Water balance
DI vs SIADH
DI: serum concentrated, urine dilute. SIADH: serum dilute, urine concentrated.
Fast review
Start with the opposites and emergencies. The full completed guide is below in the same 24-objective order.
Thyroid
Low & slow vs high & hot
Hypothyroid = bradycardia, constipation, cold, weight gain. Hyperthyroid = tachycardia, heat, weight loss, anxiety.
Adrenal
Addison vs Cushing
Addison = low cortisol ± aldosterone. Cushing = cortisol excess. BP, glucose, weight, and potassium often move in opposite directions.
Emergency priorities
ABCs + neuro first
Stridor, shock, seizure, coma, major bleeding, and severe sodium changes outrank routine teaching.
How this version is organized
This page is rebuilt from the newly supplied Endocrine Study Guide. It keeps the lecture-first + web-supplement framework, preserves the course wording and high-yield distinctions, and reorganizes tables and bullets for faster studying.
24 objectives27 lettered sub-objectivesLecture firstATI / NCLEX focusNo dropdowns
No sections match your search.
Objective 1
Recognize endocrine situations requiring immediate nursing intervention
LectureWeb supplementLecture emergencies/complications + W1-W5, W9-W13
Prioritize acute airway, breathing, circulation, neurologic, and severe electrolyte threats before stable chronic endocrine findings. The endocrine diagnosis matters, but the immediate physiologic threat determines the first action.
| Situation | Red flags | Priority nursing response |
|---|---|---|
| Post-thyroidectomy airway obstruction / neck hematoma | Stridor, respiratory distress, rapidly enlarging neck swelling, choking sensation, severe bleeding | Stay with the patient; call rapid response/surgeon; support airway/oxygen; prepare emergency airway equipment. Do not delay for routine labs. |
| Thyroid storm | Very high fever, marked tachycardia, agitation/delirium, heart failure, severe hypermetabolism | Emergency ABCs, cardiac monitoring, cooling, prescribed beta blocker/antithyroid therapy/iodine/steroids, and treatment of the trigger. |
| Myxedema coma | Hypothermia, bradycardia, hypotension, hypoventilation, severe lethargy/coma | Airway/ventilation support, IV thyroid hormone and glucocorticoids as ordered, cautious warming, correct glucose/electrolytes. |
| Adrenal crisis | Shock/hypotension, vomiting/diarrhea, weakness, confusion, hypoglycemia, hyponatremia, hyperkalemia | Rapid IV fluids, IV hydrocortisone, dextrose/electrolyte treatment, ECG and hemodynamic monitoring. |
| Severe SIADH hyponatremia | Seizure, severe confusion, coma, rapidly falling sodium | Seizure precautions, urgent provider/rapid response, controlled hypertonic saline when ordered; avoid overly rapid sodium correction. |
| Severe DI dehydration / hypernatremia | Massive polyuria, hypotension, tachycardia, altered mental status, rising Na/osmolality | Restore circulating volume/water as ordered, strict I/O, frequent sodium/osmolality, desmopressin for central DI. |
| Pheochromocytoma crisis | Severe/labile hypertension, headache, palpitations, diaphoresis, chest pain or neurologic symptoms | Reduce stimulation; continuous BP/cardiac monitoring; prescribed alpha-directed BP control; do not vigorously palpate the abdomen. |
| Post-transsphenoidal CSF leak | New clear watery drainage from nose, severe headache, meningitis signs | Report immediately; protect from straining; assess neurologic status and infection risk; follow surgical protocol for testing drainage. |
NCLEX/ATI priority cue: Airway obstruction after thyroid surgery, shock in adrenal crisis, seizure from severe hyponatremia, and major neurologic change outrank routine teaching or scheduled medications.
Objective 2
Physiology and hormones of the pituitary, thyroid, and adrenal glands
LectureWeb supplementPt1 slides 6-8, 18-21; Pt2 slides 10-11 + W28-W29
| Gland / axis | Hormone | Main effect / feedback pattern |
|---|---|---|
| Hypothalamus → posterior pituitary | ADH (vasopressin) | Synthesized in the hypothalamus and released from the posterior pituitary. Rising serum osmolality or falling blood volume increases ADH → kidneys retain water → urine becomes more concentrated. |
| Anterior pituitary → thyroid | TSH | Stimulates thyroid production of T4/T3. High circulating T3/T4 suppress TSH; low T3/T4 stimulates TSH in an intact primary axis. |
| Anterior pituitary → body tissues/liver | Growth hormone (GH) | Stimulates somatic growth and regulates metabolism; much of the growth effect is mediated through IGF-1. Web supplement. |
| Anterior pituitary → mammary glands | Prolactin | Stimulates milk production; normally held in check mainly by hypothalamic dopamine. Web supplement. |
| Anterior pituitary → gonads | FSH and LH | FSH supports ovarian follicle development and spermatogenesis. LH triggers ovulation/corpus luteum function and stimulates testicular testosterone production. Web supplement. |
| Hypothalamus → posterior pituitary | Oxytocin | Synthesized in the hypothalamus and stored/released from the posterior pituitary; promotes uterine contractions and milk ejection. Web supplement. |
| Thyroid | T4, T3; calcitonin | T3/T4 increase cellular metabolic activity and affect oxygen use, heat production, heart rate, GI motility, growth/development, and energy expenditure. Calcitonin tends to lower serum calcium. Calcitonin detail = web supplement. |
| Parathyroid (lecture extension) | PTH | Raises serum calcium through bone, kidney, and vitamin-D-mediated intestinal effects. Loss/damage can cause hypocalcemia and tetany after thyroid surgery. |
| Anterior pituitary → adrenal cortex | ACTH | Stimulates adrenal glucocorticoid production, especially cortisol. Cortisol provides negative feedback to the hypothalamus/pituitary. |
| Adrenal cortex | Aldosterone | Promotes sodium/water retention and potassium excretion, supporting intravascular volume and blood pressure. |
| Adrenal cortex | Cortisol | Supports the stress response, glucose availability, vascular tone, and immune/inflammatory regulation. |
| Adrenal cortex | Androgens | Adrenal sex steroids contribute to secondary sexual characteristics/libido, especially in females. |
| Adrenal medulla | Epinephrine / norepinephrine | Catecholamines mediate the sympathetic fight-or-flight response: increased HR, vascular tone, glucose availability, and metabolic activity. |
Feedback rule: Target hormone high → pituitary trophic hormone usually low; target hormone low → pituitary trophic hormone usually high, unless the pituitary/hypothalamus itself is the problem.
Objective 3
Define and use key endocrine terms
LectureWeb supplementLecture patterns/complications + W4, W5, W7-W10
A. Goiter: Enlargement of the thyroid gland. Can occur with hyperthyroidism, hypothyroidism, or normal thyroid function; Graves disease and iodine deficiency are classic causes. [Lecture + Web]
B. Thyroiditis (Hashimoto's): Autoimmune destruction/inflammation of the thyroid and a major cause of primary hypothyroidism. [Lecture + Web]
C. Thyrotoxicosis: Clinical state caused by excessive circulating thyroid hormone from any source. Hyperthyroidism is thyrotoxicosis caused by increased thyroid synthesis; thyroiditis or excess replacement can also cause thyrotoxicosis. [Web supplement]
D. Myxedema: Severe/long-standing hypothyroid tissue change with thickened, dry skin and nonpitting edema from mucopolysaccharide accumulation. Myxedema coma is the life-threatening decompensated form. [Lecture + Web]
E. Tetany: Neuromuscular irritability with painful spasms, tingling, hyperreflexia, and possible laryngospasm or seizures, classically due to hypocalcemia after parathyroid injury. [Lecture + Web]
F. Thyrotoxic crisis: Thyroid storm: extreme hypermetabolism with high fever, severe tachycardia, agitation/delirium, GI symptoms, and possible heart failure. [Lecture + Web]
G. Dilutional hyponatremia: Low serum sodium caused by excess water relative to sodium. In SIADH, excess ADH retains water and dilutes serum sodium even though total body sodium may not be truly depleted. [Lecture + Web]
H. Euthyroid: Normal thyroid functional state: thyroid hormone effect is appropriate and TSH/T4 are in the expected range for the clinical context. [Web supplement]
I. Hypoparathyroidism: Inadequate PTH secretion, causing low serum calcium and usually high phosphate. It may occur after thyroid/parathyroid surgery and can produce tetany. [Lecture + Web]
J. Exophthalmos: Forward protrusion/proptosis of the eyes. Graves ophthalmopathy can cause proptosis, lid retraction, dryness, exposure injury, and visual complications. [Lecture + Web]
Fast associations: SIADH = dilutional hyponatremia. Graves = hyperthyroidism + goiter ± eye disease. Post-thyroidectomy tingling/tetany = think hypocalcemia from parathyroid injury.
Objective 4
Tasks that may be delegated to assistive personnel (AP)
Web supplementNCSBN delegation principles [W18]
Delegation depends on patient stability, predictability, AP competence, state law, and facility policy. The RN retains accountability for assessment, nursing judgment, evaluation, and appropriate supervision.
| Appropriate for trained AP when patient is stable | Keep with the RN |
|---|---|
| Routine vital signs and promptly report abnormal values | Initial or focused assessment of endocrine instability |
| Daily weight using the same scale/time | Interpretation of weight change, sodium, osmolality, thyroid/adrenal labs |
| Measure and record intake/output and urine volume | Evaluate DI/SIADH fluid balance and decide treatment changes |
| Assist with hygiene, oral care, toileting, positioning, ambulation, fall precautions | Teach new medication regimens, fluid restriction, stress dosing, or emergency plans |
| Collect routine urine specimens if trained and directed | Clinical judgment about seizure risk, airway compromise, shock, CSF leak, or thyroid/adrenal crisis |
| Report new confusion, weakness, excessive urine, dizziness, or distress immediately | Administer/titrate high-risk IV therapy or evaluate response to therapy |
Delegation cue: AP can collect data; the RN interprets the data. Unstable endocrine patients and tasks requiring assessment, teaching, or clinical judgment stay with the licensed nurse.
Objective 5
Compare diabetes insipidus (DI) and SIADH
LectureWeb supplementPt1 slides 11-15 + W1-W2
| Feature | Diabetes insipidus (DI) | SIADH |
|---|---|---|
| Core problem | Too little ADH effect: central/neurogenic deficiency or nephrogenic renal resistance. Lecture also lists psychogenic polydipsia in the differential. | Too much/inappropriate ADH effect → excessive water retention. |
| Common causes | Head trauma, pituitary/hypothalamic tumor, infection, neurosurgery; nephrogenic causes include renal resistance and certain drugs. | CNS disease, pulmonary disease, malignancy, medications, pain/nausea, or postoperative stress. |
| Urine | Very large volume, very dilute; low urine osmolality and low specific gravity. | Lower volume, concentrated; urine osmolality is inappropriately high for the low serum osmolality. |
| Serum sodium | Often high if water intake cannot match losses. | Low — dilutional hyponatremia. |
| Serum osmolality | High or high-normal from free-water loss. | Low from water excess. |
| Volume / weight | Fluid-volume deficit, dehydration, weight loss, hypotension/tachycardia if severe. | Usually clinically euvolemic; weight may rise from water retention without dramatic peripheral edema. |
| Key symptoms | Polyuria, nocturia, intense thirst, dry mucosa, weakness, dizziness, altered mental status if hypernatremic. | Headache, nausea, confusion, lethargy, muscle cramps; seizures/coma when hyponatremia is severe. |
| Memory cue | “Dry Inside.” | “Soaked Inside.” |
High-yield opposite pattern: DI = serum concentrated, urine dilute. SIADH = serum dilute, urine concentrated.
Objective 6
Nursing diagnoses, priority interventions, and teaching for DI and SIADH
LectureWeb supplementPt1 slides 12-15 + W1, W2, W26
Diabetes insipidus (DI)
- Likely nursing problems: Deficient fluid volume, risk for electrolyte imbalance, risk for injury/falls, disturbed sleep from polyuria, knowledge deficit.
- Assessment priorities: Strict I/O, hourly urine output when acute, daily weight, vital signs/orthostatics, neurologic status, serum sodium/osmolality, urine specific gravity/osmolality, mucous membranes and thirst.
- Treatment focus: Replace water/volume as prescribed, treat the cause, and give desmopressin for central DI. Watch for over-treatment causing water intoxication and hyponatremia.
- Teaching: Take desmopressin exactly as prescribed; know route-specific technique; maintain access to water unless specifically restricted; track unusual changes in thirst/urination/weight; seek care for confusion, severe weakness, inability to drink, or hyponatremia symptoms.
SIADH
- Likely nursing problems: Risk for electrolyte imbalance, risk for acute confusion/seizure, excess water retention, knowledge deficit.
- Assessment priorities: Strict I/O, daily weight, frequent sodium/osmolality as ordered, vital signs, lung/volume assessment, and repeated neurologic checks.
- Treatment focus: Identify and treat the cause; fluid restriction is a major intervention. Severe symptomatic hyponatremia may require carefully controlled 3% saline. Sodium correction must be gradual enough to reduce osmotic demyelination risk.
- Safety: Seizure precautions for severe/symptomatic hyponatremia; reduce free-water intake as ordered; provide frequent oral care and ice chips only if permitted within the fluid limit.
- Teaching: Explain why drinking extra water can worsen SIADH; include all liquids in the restriction; monitor daily weight and neurologic symptoms; review medications that may contribute to SIADH with the prescriber.
Priority trend: For both disorders, daily weight and neurologic status often reveal clinically important change faster than a single isolated I/O or lab value.
Objective 7
Pre- and postoperative care for transsphenoidal hypophysectomy
LectureWeb supplementPt1 slides 16-17 + W3
Preoperative care
- Establish baseline neurologic status and visual acuity/visual fields; review pituitary hormone abnormalities and replacement needs.
- Explain the nasal/endoscopic route, expected nasal packing, mouth breathing, oral dryness, and need for frequent oral care.
- Teach postoperative precautions before surgery: no forceful nose blowing; avoid bending, heavy lifting, straining, and forceful coughing when possible; sneeze with the mouth open if needed.
- Complete routine pre-op preparation: consent verification, NPO status, medications/labs, infection assessment, and questions about postoperative monitoring.
Postoperative care
- Position: HOB 15–30° unless otherwise ordered; maintain alignment and avoid maneuvers that increase ICP.
- Nasal packing / oral care: Do not manipulate packing. Provide frequent mouth care and humidification measures per protocol.
- CSF leak: Watch for clear watery nasal drainage, persistent salty/metallic taste, severe headache, fever, or meningitis signs. Clear drainage requires prompt evaluation.
- Vision / neuro: Reassess visual acuity/fields, LOC, headache pattern, and cranial nerve changes.
- Fluid / hormone complications: Strict I/O, urine output, daily weight, serum sodium, and urine concentration. Watch for postoperative DI and later SIADH.
- Activity: Avoid straining, heavy lifting, and other actions that raise pressure across the surgical site until cleared.
Report immediately: Clear nasal drainage, sudden visual loss, declining LOC, severe polyuria with rising sodium, seizure/confusion from hyponatremia, or meningitis signs.
Objective 8
Diagnostic studies for DI and SIADH
LectureWeb supplementPt1 slides 12-14 + W1-W2
| Test | DI — anticipated pattern | SIADH — anticipated pattern / responsibility |
|---|---|---|
| Serum sodium | Often increased from free-water loss, especially if thirst/access to water is impaired. | Decreased (dilutional). Trend closely; severe symptoms matter more than the number alone. |
| Serum osmolality | Increased/high-normal. | Decreased. Low serum osmolality should normally suppress ADH, but urine remains concentrated. |
| Urine osmolality | Low/inappropriately dilute for the serum concentration. | Inappropriately high/concentrated despite low serum osmolality. |
| Urine specific gravity | Low; often <1.005 in marked water diuresis, but use the lab/course range. | Higher than expected for the dilute serum; not maximally dilute. |
| ADH / vasopressin level | Central DI: low/inappropriately low; nephrogenic DI: normal/high because kidneys are resistant. Levels are not always routinely available. | Inappropriately present/elevated relative to hypo-osmolality; diagnosis usually relies more on the serum/urine pattern and context than ADH alone. |
| Desmopressin / vasopressin challenge | Lecture: central DI shows urine osmolality increase >50% after desmopressin; little response suggests nephrogenic resistance. | Not the routine test for SIADH. |
| 24-hour urine / measured output | Documents high urine volume and water loss. Ensure complete collection and accurate I/O. | May document reduced output, but diagnosis centers on hyponatremia + low serum osmolality + concentrated urine in a euvolemic patient. |
Testing safety: Formal water-deprivation testing can cause serious dehydration and must be performed under close medical supervision; it is not a bedside self-test.
Objective 9
Risk factors and etiology of hypothyroidism and hyperthyroidism
LectureWeb supplementPt1 slides 22-28; Pt2 slides 3-6 + W4-W8
| Disorder | Major causes / risk factors | Course-specific points |
|---|---|---|
| Hypothyroidism | Hashimoto autoimmune thyroiditis; prior radioactive iodine or thyroid surgery; neck radiation; iodine deficiency; some medications; pituitary/hypothalamic disease (central hypothyroidism). | Lecture highlights Hashimoto disease, treatment for hyperthyroidism, radiation therapy, and iodine deficiency. |
| Hyperthyroidism / thyrotoxicosis | Graves disease; toxic multinodular goiter or toxic adenoma; thyroiditis; excess thyroid hormone replacement; less often TSH-driven disease. | Lecture identifies Graves as autoimmune and also lists thyroiditis, overmedication with synthetic thyroid hormone, and thyroid nodules. |
| Goiter | Thyroid enlargement can occur with Graves/hyperthyroidism, iodine deficiency/hypothyroidism, nodular disease, or even euthyroid states. | Do not assume goiter automatically means hyperthyroidism; interpret with TSH/T4 and cause. |
Primary thyroid lab rule: Primary hypothyroidism = low free T4 + high TSH. Primary hyperthyroidism = high T4/T3 + suppressed TSH. Pituitary disease can break this usual inverse pattern.
Objective 10
Compare clinical manifestations of hypothyroidism and hyperthyroidism
LectureWeb supplementPt1 slides 23, 29; Pt2 slides 4-8 + W4-W5
| System | Hypothyroidism — “low and slow” | Hyperthyroidism — “high and hot” |
|---|---|---|
| Metabolism / weight | Decreased BMR, fatigue, lethargy, weight gain, cold intolerance. | Increased metabolism, weight loss despite appetite, heat intolerance, sweating. |
| Cardiovascular | Bradycardia, reduced cardiac output; possible enlarged heart in severe disease. | Tachycardia, palpitations, systolic HTN/widened pulse pressure, atrial fibrillation risk. |
| GI | Decreased motility, constipation. | Increased motility, frequent stools/diarrhea. |
| Neuro / mood | Slowed thinking, impaired memory, somnolence, depression-like symptoms. | Anxious, nervous, irritable, tremor, hyperreflexia, insomnia. |
| Skin / hair | Dry/coarse skin, thickening, brittle/coarse hair, possible nonpitting myxedema. | Warm moist skin, fine hair; Graves may cause pretibial skin change. |
| Eyes | Usually no Graves-type exophthalmos. | Graves: lid retraction/proptosis/exophthalmos, dryness/exposure. |
| Muscle / bone | Weakness, cramps, slowed reflex relaxation. | Proximal weakness; long-term excess can contribute to osteoporosis/fracture. |
| Reproductive | Menstrual changes may occur. | Menstrual irregularity/decreased fertility may occur. |
| Severe emergency | Myxedema coma: hypothermia, hypoventilation, bradycardia, hypotension, altered LOC. | Thyroid storm: high fever, severe tachycardia, agitation/delirium, heart failure. |
Objective 11
Thyroid diagnostic tests: purpose, anticipated results, and nursing responsibilities
LectureWeb supplementPt1 slides 20-25; Pt2 slide 5 + W3-W5
| Test | Purpose / expected pattern | Nursing responsibilities |
|---|---|---|
| A. Serum T3 | Measures active thyroid hormone. Often elevated in hyperthyroidism; may remain normal in some hypothyroid states. Useful when T3-toxicosis is suspected. | Review medications/supplements and lab instructions; biotin can interfere with some thyroid assays. Interpret with TSH and free T4, not alone. |
| B. Serum free T4 | Estimates unbound thyroxine. Primary hypothyroidism: low; primary hyperthyroidism: high. | No special bedside care beyond blood draw. Trend with TSH and clinical state; critical illness and drugs can alter interpretation. |
| C. RAIU | Measures how much radioiodine the thyroid takes up. Graves/toxic hyperfunction usually shows increased uptake; thyroiditis or exogenous hormone often shows low uptake. | Verify pregnancy/breastfeeding status and nuclear-medicine instructions; review recent iodine-containing contrast/meds; explain diagnostic tracer and return imaging schedule. |
| D. Serum TSH | Best initial screening test for most primary thyroid disorders. Primary hypothyroid: high TSH; primary hyperthyroid: low/suppressed TSH. | Interpret with free T4/T3 and pituitary context. Central hypothyroidism may have low or inappropriately normal TSH despite low T4. |
RAIU distinction: High thyroid hormone + high uptake = the gland is actively making hormone (e.g., Graves). High thyroid hormone + low uptake = hormone is leaking/released without active synthesis (e.g., thyroiditis) or coming from outside the gland.
Objective 12
Nursing diagnoses, interventions, and teaching for thyroid dysfunction
LectureWeb supplementPt1 slides 27-29; Pt2 slides 6-8 + W4-W8, W16-W23
Hypothyroidism
- Common nursing problems: Fatigue/activity intolerance, constipation, risk for falls, impaired thermoregulation, altered cognition, knowledge deficit.
- Interventions: Monitor HR/BP/temperature, cardiac status in significant disease, bowel function, skin integrity, mental status, and thyroid labs. Pace activity with rest and prevent falls.
- Levothyroxine teaching: Take consistently on an empty stomach 30–60 minutes before breakfast (or consistently at bedtime if prescribed), separate from calcium/iron by at least 4 hours, and do not stop without prescriber guidance. Improvement is gradual and TSH guides dosing.
- Safety: Report chest pain, marked palpitations, severe dyspnea, or signs of over-replacement. Older adults/cardiac patients may require slower dose titration.
Hyperthyroidism / Graves disease
- Common nursing problems: Imbalanced nutrition from hypermetabolism, anxiety, hyperthermia, risk for decreased cardiac output/dysrhythmia, sleep disturbance, eye discomfort/exposure injury, knowledge deficit.
- Interventions: Cardiac monitoring as indicated, frequent VS, calm/cool environment, rest, high-calorie/high-protein nutrition in smaller frequent meals, daily weights, eye lubrication/protection, and medication education.
- Antithyroid teaching: Methimazole is generally preferred for nonpregnant adults; PTU is reserved for selected situations. Fever or sore throat can signal agranulocytosis; jaundice/dark urine/RUQ pain can indicate liver injury.
- Lecture medication cue: Avoid stimulant/decongestant products unless approved because they can aggravate tachycardia and adrenergic symptoms. Monitor for transition to hypothyroidism after definitive therapy.
Objective 13
Clinical manifestations and management of myxedema coma and thyroid storm
LectureWeb supplementPt1 slide 29; Pt2 slides 7-8 + W4, W10
A. Myxedema coma
- Recognition: Extreme severe hypothyroidism; hypothermia, bradycardia, hypotension, hypoventilation/hypoxemia, hyponatremia, possible hypoglycemia, lethargy progressing to coma.
- Triggers: Infection, cold exposure, sedatives/opioids, stroke/MI, trauma, or stopping thyroid replacement.
- Management: ICU-level ABC support, oxygen/ventilatory assistance, IV thyroid hormone, empiric glucocorticoids until adrenal insufficiency is excluded, careful fluids/glucose/electrolytes, and treatment of the precipitating cause.
- Nursing caution: Rewarm cautiously; aggressive external warming can worsen vasodilation/hypotension. Avoid unnecessary sedatives because drug metabolism is slowed.
B. Thyroid storm / thyrotoxic crisis
- Recognition: Severe hypermetabolism: high fever, marked tachycardia/arrhythmia, agitation/delirium, tremor, GI symptoms, possible heart failure.
- Triggers from lecture: Graves disease, abrupt stopping of antithyroid medication, thyroid surgery, infection, trauma.
- Management: ABCs, oxygen, cooling, IV fluids/dextrose/electrolyte correction, beta blockade as ordered, antithyroid drug, iodine after the thionamide, glucocorticoid, and treatment of the trigger. Cholestyramine may be used as an adjunct in selected cases.
- Nursing focus: Continuous ECG/VS, temperature and neurologic checks, fluid balance, reduced stimulation, medication timing, and rapid recognition of heart failure or shock.
Do not confuse: Myxedema coma = cold, slow, hypoventilating. Thyroid storm = hot, fast, hyperadrenergic. Both are life-threatening and require immediate stabilization.
Objective 14
Preoperative and postoperative care for thyroidectomy
LectureWeb supplementPt1 slides 30-31 + W8-W9
Preoperative care
- Control hyperthyroidism before surgery when possible with prescribed antithyroid medication and beta blocker; iodine drops such as SSKI/Lugol may be used for about 7–10 days pre-op to reduce thyroid blood flow in Graves disease.
- Assess baseline voice/hoarseness, airway, thyroid size/compressive symptoms, calcium/vitamin D status when ordered, cardiac rhythm, and thyroid function.
- Teach postoperative neck support, position, coughing/deep-breathing technique without excessive neck strain, expected incision/drain care, and symptoms to report immediately.
- Ensure emergency airway equipment and calcium replacement are available according to facility protocol.
Postoperative care
- Airway first: Assess for stridor, dyspnea, choking sensation, neck swelling, tracheal deviation, and rapidly increasing drainage. A neck hematoma can obstruct the airway.
- Hemorrhage: Inspect anterior dressing and behind neck/shoulders for hidden drainage; monitor HR/BP and swallowing frequency.
- Laryngeal nerve: Assess voice quality and ability to speak. Persistent hoarseness, weak voice, or respiratory difficulty may indicate nerve injury or edema.
- Hypocalcemia: Monitor perioral/fingertip tingling, muscle cramps, Chvostek/Trousseau signs, tetany, laryngospasm, and serum calcium.
- Position / pain: Semi-Fowler unless contraindicated; support head/neck; avoid hyperextension; provide analgesia and pulmonary hygiene.
- Hormone status: Total thyroidectomy requires lifelong thyroid hormone replacement. Monitor for hypothyroidism and immediate perioperative thyroid storm if surgery followed uncontrolled hyperthyroidism.
Post-op bedside priorities: Airway/tracheostomy or emergency airway supplies, suction/oxygen, and calcium replacement access are more urgent than routine comfort measures if stridor, swelling, or tetany appears.
Objective 15
Tetany, Chvostek and Trousseau signs after thyroidectomy
LectureWeb supplementPt1 slides 31-33 + W9
Parathyroid glands lie on the posterior thyroid and regulate serum calcium through PTH. Accidental removal, injury, or temporary ischemia after thyroid surgery can lower PTH and produce hypocalcemia.
| Finding | What it looks like | Nursing significance |
|---|---|---|
| Early hypocalcemia | Perioral numbness/tingling, fingertip paresthesias, muscle cramps, anxiety, hyperreflexia | Check calcium promptly; trend symptoms and ECG if significant. |
| Chvostek's sign | Facial muscle twitching when the facial nerve is tapped near the cheek. | Supports neuromuscular irritability from hypocalcemia but is not perfectly specific. |
| Trousseau's sign | Carpal spasm after inflating a BP cuff above systolic pressure for several minutes. | More suggestive of latent tetany/hypocalcemia. |
| Severe tetany | Generalized spasms, laryngospasm/stridor, seizures, prolonged QT/arrhythmia | Airway and cardiac emergency; IV calcium (commonly calcium gluconate) may be required as ordered. |
NCLEX cue: After thyroidectomy, tingling around the mouth or fingers is not a minor comfort complaint — it can be the first sign of clinically important hypocalcemia.
Objective 16
Etiology, risk factors, and manifestations of Cushing's syndrome and Addison's disease
LectureWeb supplementPt2 slides 12-22 + W11-W14
| Feature | Addison's disease / primary adrenal insufficiency | Cushing syndrome / hypercortisolism |
|---|---|---|
| Core hormone problem | Low cortisol; primary disease also reduces aldosterone. | Excess cortisol. |
| Common causes | Autoimmune adrenal destruction is most common in developed countries; also infection, hemorrhage, metastasis/infiltration, or bilateral adrenal removal. | Chronic exogenous glucocorticoids; pituitary ACTH tumor (Cushing disease); adrenal cortisol-producing tumor; ectopic ACTH. |
| Important clarification | Abruptly stopping chronic glucocorticoids causes secondary/tertiary adrenal insufficiency rather than autoimmune Addison disease, but it can still precipitate adrenal crisis. | Lecture shorthand says “syndrome: adrenal tumor”; current definition is broader — syndrome includes any cause of excess cortisol. |
| Appearance / weight | Weight loss/emaciation, weakness, dehydration; primary disease can cause hyperpigmentation from elevated ACTH. | Central weight gain, moon face, dorsocervical fat pad (“buffalo hump”), thin limbs, purple striae, acne/hirsutism. |
| BP / electrolytes | Hypotension/orthostasis; hyponatremia and hyperkalemia are classic in primary disease. | Hypertension; sodium/water retention may occur; potassium can fall in severe cortisol excess. |
| Glucose | Hypoglycemia risk, especially during crisis. | Hyperglycemia/glucose intolerance. |
| Immune / skin / bone | Weakness and chronic fatigue; GI symptoms common. | Poor wound healing, bruising/thin skin, infection risk, osteoporosis/fracture, proximal muscle weakness. |
| Neuro / psych | Fatigue, irritability/depression, confusion in crisis. | Depression, anxiety, irritability, cognitive changes; sleep disturbance. |
Objective 17
Differentiate Cushing's disease from Cushing syndrome
LectureWeb supplementPt2 slide 19 + W14
| Term | Definition | ACTH pattern / implication |
|---|---|---|
| Cushing syndrome | Umbrella term for chronic cortisol excess from any cause: exogenous steroids, pituitary ACTH, ectopic ACTH, or adrenal cortisol production. | ACTH may be low or high depending on cause. |
| Cushing disease | Specific subtype of Cushing syndrome caused by an ACTH-secreting pituitary adenoma. | ACTH is inappropriately normal/high; excess ACTH drives bilateral adrenal cortisol production. |
| Adrenal Cushing syndrome | Cortisol-producing adrenal adenoma/carcinoma or adrenal hyperplasia. | ACTH is typically suppressed by negative feedback. |
Exam wording correction: All Cushing disease is Cushing syndrome, but not all Cushing syndrome is Cushing disease.
Objective 18
Teaching, medical management, and nursing management of Addison's disease, adrenal crisis, and Cushing syndrome
LectureWeb supplementPt2 slides 16-18, 22-23 + W11-W14, W24-W25
Addison's disease — chronic management
- Hormone replacement: Hydrocortisone or another glucocorticoid replaces cortisol; fludrocortisone replaces mineralocorticoid in primary adrenal insufficiency when needed.
- Teaching: Do not stop corticosteroids abruptly. Learn sick-day/stress dosing. Wear medical alert identification. Keep prescribed emergency injectable glucocorticoid available and teach family how/when to use it.
- Monitoring: BP/orthostasis, weight, sodium, potassium, glucose, hydration, infection/illness, and symptoms of too little versus too much replacement.
- Diet: Some patients with primary adrenal insufficiency need additional dietary sodium, particularly with heavy sweating/heat, but follow the individualized plan.
Addisonian / adrenal crisis — emergency management
- Lecture: fluid replacement with D5%NS, IV glucocorticoid replacement (hydrocortisone preferred), replace glucose/electrolytes, and identify/reduce the stressor.
- Continuous hemodynamic/ECG monitoring; watch hyperkalemia, hypoglycemia, severe hypotension/shock, altered mental status, and urine output.
- Treat the precipitating infection, trauma, surgery-related stress, vomiting/diarrhea, or steroid withdrawal.
Cushing syndrome — management and teaching
- Treat the source: taper exogenous glucocorticoids safely when possible; pituitary disease may need transsphenoidal surgery; adrenal tumors may require adrenalectomy; radiation or cortisol-lowering medications may be used in selected cases.
- Monitor glucose, BP, potassium/sodium, infection, skin integrity/wounds, edema, weight, bone health, mood/cognition, and fall risk.
- Use gentle skin care, protect from trauma, provide adequate protein and calcium/vitamin D as appropriate, and reduce excess sodium if ordered for fluid/BP control.
- After successful treatment, temporary or long-term adrenal hormone replacement may be needed because the HPA axis can remain suppressed.
Objective 19
Adrenal diagnostic tests: purpose, expected results, and nursing responsibilities
LectureWeb supplementPt2 slides 15, 22, 27 + W11, W14-W17
| Test | Purpose / expected result | Nursing responsibilities |
|---|---|---|
| A. Serum cortisol / 24-h urinary free cortisol | Low AM cortisol supports adrenal insufficiency in the correct context. Elevated 24-h urinary free cortisol is one screening approach for Cushing syndrome. | Serum cortisol varies by time/stress; note collection time and steroid medications. For 24-h urine, collect every void for the full period and follow storage instructions. |
| B. Dexamethasone suppression test | Tests whether cortisol suppresses after dexamethasone. Normal physiology suppresses cortisol; failure to suppress on low-dose testing supports endogenous Cushing syndrome. | Give dexamethasone at the ordered time, obtain timed cortisol exactly as ordered, review interfering drugs, and explain that it is a diagnostic test rather than routine steroid treatment. |
| C. ACTH stimulation test | Baseline cortisol → synthetic ACTH (cosyntropin) → repeat cortisol. Normal adrenal glands increase cortisol; little/no rise supports adrenal insufficiency. | Obtain timed baseline and post-dose specimens accurately; monitor the patient during the test; baseline ACTH helps distinguish primary (often high ACTH) from secondary disease. |
| D. 24-h urinary fractionated metanephrines | Detects catecholamine metabolites for pheochromocytoma. Elevated metanephrines support a catecholamine-secreting tumor; imaging follows biochemical confirmation. | Ensure complete timed collection and correct storage. Minimize stress; review foods/medications that can interfere according to the laboratory. Avoid vigorous abdominal palpation if pheochromocytoma is suspected. |
Collection cue: A 24-hour urine is only useful if the collection is complete. Missing one void can invalidate the result; follow the lab policy for whether the collection must be restarted.
Objective 20
Pre- and postoperative care for adrenalectomy
LectureWeb supplementPt2 slides 23-25 + W12, W15, W17
Preoperative care
- Identify which hormone is excessive or deficient and stabilize the physiologic problem before surgery: BP, glucose, sodium/potassium, fluid volume, infection risk, and cardiovascular status.
- For pheochromocytoma, preoperative BP control and volume preparation are critical; alpha-adrenergic blockade is commonly used before resection. A beta blocker, if needed for tachycardia, is added only after adequate alpha blockade.
- For cortisol-producing tumors/Cushing syndrome, anticipate perioperative glucocorticoid coverage because the opposite adrenal gland and HPA axis may be suppressed.
- Teach deep breathing, coughing/splinting, incentive spirometry, pain control, early ambulation, and the possibility of temporary or lifelong hormone replacement.
Postoperative care
- Hemorrhage / hemodynamics: Monitor for hemorrhage. Trend BP/HR, incision/drains, Hgb/Hct if ordered, urine output, and shock signs.
- Respiratory: Deep breathing, coughing, incentive spirometry, pain control, and early mobilization.
- Hormones / electrolytes: Monitor cortisol status, BP, glucose, sodium, potassium, and fluid balance. Watch for acute adrenal insufficiency after removal of a cortisol-secreting tumor.
- Steroid replacement: Give perioperative glucocorticoids exactly as ordered; taper only under prescriber direction. Bilateral adrenalectomy requires lifelong glucocorticoid and mineralocorticoid replacement.
- Pheochromocytoma-specific: After tumor removal, watch for hypotension and hypoglycemia as catecholamine excess abruptly resolves; continue close hemodynamic monitoring.
Lecture cue: “Bilateral Addison” on the lecture slide means removal of both adrenal glands creates permanent primary adrenal insufficiency, so lifelong hormone replacement is required.
Objective 21
Risk factors and etiology of pheochromocytoma
LectureWeb supplementPt2 slide 26 + W15-W17
- Definition: Catecholamine-producing tumor arising from chromaffin cells, usually in the adrenal medulla; extra-adrenal tumors are called paragangliomas.
- Lecture: Described as usually benign, catecholamine excess, about 40% genetic, and characterized by unpredictable attacks.
- Web clarification: A substantial minority are hereditary; associated syndromes/genes include MEN2, von Hippel-Lindau disease, neurofibromatosis type 1, and SDHx-related paraganglioma syndromes. Modern references emphasize variable metastatic potential rather than relying only on a benign/malignant label.
- When to suspect: Paroxysmal or resistant hypertension, classic episodic headache/sweating/palpitations, adrenal incidentaloma, or family/genetic history.
Objective 22
Clinical manifestations and nursing management of pheochromocytoma
LectureWeb supplementPt2 slides 26-28 + W15-W17
Clinical manifestations — the 5 Hs
| 5 Hs | Meaning |
|---|---|
| Hypertension | Persistent or episodic severe BP elevation. |
| Headache | Often sudden/severe during a catecholamine spell. |
| Hyperhidrosis | Profuse sweating/diaphoresis. |
| Hypermetabolism | Tachycardia/palpitations, tremor, weight loss, anxiety, increased metabolic activity. |
| Hyperglycemia | Catecholamines increase glucose availability and can elevate blood glucose. |
Other common features: palpitations/rapid heartbeat, pallor, tremor, anxiety or sense of doom, chest/abdominal discomfort, and unpredictable paroxysmal attacks. Symptoms may be triggered by stress, exertion, surgery/anesthesia, some medications, and sometimes high-tyramine foods.
Nursing management
- Frequent/continuous BP and cardiac monitoring during symptomatic or perioperative periods; assess for chest pain, dysrhythmia, stroke symptoms, or end-organ injury.
- Provide a quiet, low-stimulation environment and avoid unnecessary procedures that trigger sympathetic surges. Do not vigorously palpate the abdomen/tumor.
- Monitor fluid balance and glucose; chronic vasoconstriction can leave the patient volume depleted despite hypertension.
- Administer prescribed alpha-blocker before surgery and monitor for orthostatic hypotension. If a beta blocker is added for tachycardia, it follows adequate alpha blockade.
- Surgery/adrenalectomy is definitive treatment for localized disease after adequate preoperative preparation. Post-op, watch closely for hypotension and hypoglycemia.
Medication sequence: Alpha blockade comes before beta blockade. Giving beta blockade first can worsen vasoconstriction and precipitate a dangerous hypertensive response.
Objective 23
Interdisciplinary healthcare collaboration
Web supplementTeam-based endocrine care + W18
| Team member | Common role in these endocrine disorders |
|---|---|
| Endocrinologist | Hormone diagnosis, interpretation of complex tests, medication titration, long-term thyroid/pituitary/adrenal follow-up. |
| Neurosurgeon + ENT/skull-base surgeon | Transsphenoidal pituitary surgery and postoperative CSF/visual complications. |
| Endocrine / thyroid surgeon | Thyroidectomy or adrenalectomy, surgical complication management. |
| Pharmacist | Medication reconciliation; antithyroid, thyroid-replacement, steroid, desmopressin, and interaction teaching; safe tapering plans. |
| Dietitian | Fluid restriction strategies, high-calorie hyperthyroid nutrition, sodium guidance in adrenal insufficiency/Cushing, bone-supportive nutrition. |
| Ophthalmology | Graves eye disease/proptosis, corneal exposure, vision-threatening orbitopathy. |
| Cardiology | Dysrhythmias, severe tachycardia, heart failure, difficult hypertension, perioperative risk. |
| Nephrology / critical care | Severe sodium/osmolality disorders, symptomatic hyponatremia/hypernatremia, ICU management. |
| Physical / occupational therapy | Weakness, deconditioning, fall prevention, safe return to ADLs. |
| Case management / social work | Medication access, follow-up coordination, home support, emergency identification/supplies, transportation and education resources. |
RN role: The RN coordinates the team while retaining responsibility for nursing assessment, interpretation of patient response, teaching, and escalation of unstable findings.
Objective 24
Medication profiles: classification, action, indications, route, adverse effects, and nursing implications
LectureWeb supplementOriginal medication list + lecture medication slides + W6-W8, W16-W27, W30
A. Levothyroxine sodium (Synthroid) — thyroid replacement
Classification: Synthetic thyroid hormone (T4) replacement.
Action: Replaces endogenous thyroxine; tissues convert T4 to active T3 as needed, restoring metabolic activity.
Indications: Hypothyroidism; replacement after total thyroidectomy/RAI; IV formulation is used in severe myxedema coma.
Routes: PO; IV in selected acute settings.
Adverse effects: Usually signs of excessive dose: tachycardia, palpitations, angina, tremor, anxiety, heat intolerance, sweating, diarrhea, weight loss, insomnia; long-term overtreatment can contribute to bone loss/arrhythmia.
Nursing / teaching: Take consistently on an empty stomach 30–60 min before breakfast; separate iron/calcium by at least 4 h; monitor TSH/free T4 and clinical response; do not switch or stop without guidance; use caution in older adults/cardiac disease.
B. Methimazole (Tapazole) and propylthiouracil (PTU) — antithyroid drugs
Classification: Thionamide antithyroid drugs.
Action: Both inhibit synthesis of thyroid hormone. PTU also decreases peripheral conversion of T4 to T3.
Indications: Graves/hyperthyroidism; preoperative control. PTU has a role in thyroid storm and selected pregnancy situations; methimazole is generally preferred for routine therapy.
Route: PO.
Major adverse effects: Agranulocytosis, rash, hypothyroidism; liver injury can occur. PTU carries a boxed warning for severe liver injury/acute liver failure.
Nursing / teaching: Fever or sore throat → stop/hold per prescriber instructions and obtain urgent evaluation/CBC; report jaundice, dark urine, severe fatigue, or RUQ pain; monitor thyroid labs and hypothyroid symptoms. Symptom relief takes weeks because stored hormone must be depleted.
C. Propranolol (Inderal) — beta blocker
Classification: Nonselective beta-adrenergic blocker.
Action: Controls adrenergic manifestations such as tachycardia, tremor, anxiety, and palpitations; higher doses also reduce peripheral T4-to-T3 conversion.
Indications: Symptomatic hyperthyroidism/Graves; thyroid storm as part of emergency therapy when appropriate.
Routes: PO; IV formulations can be used in monitored acute care.
Adverse effects: Bradycardia, hypotension, fatigue, dizziness, AV block; bronchospasm risk in susceptible patients.
Nursing / teaching: Check HR/BP before and after dosing; monitor ECG when acute; use caution with asthma/reactive airway disease and heart block; do not stop chronic beta-blocker abruptly without medical guidance.
D. Iodine and radioactive iodine — RAI-131 and SSKI
| Drug | Action / indication / route | Adverse effects / nursing implications |
|---|---|---|
| Radioactive iodine (I-131) | Taken up by thyroid tissue and destroys thyroid cells. Used as definitive treatment for Graves/toxic hyperthyroidism in appropriate nonpregnant patients. Route: PO/oral capsule or solution. | Delayed effect; hypothyroidism is common/expected after definitive treatment and requires follow-up. Contraindicated in pregnancy and breastfeeding. Follow nuclear-medicine radiation-safety instructions; lecture notes it leaves the body mainly through urine. |
| SSKI / potassium iodide | High-dose iodide acutely suppresses thyroid hormone release and decreases gland vascularity; used short-term as adjunct therapy and before thyroidectomy in selected Graves patients. Route: PO/oral solution. | GI upset, rash, salivary swelling, iodism/metallic taste, thyroid dysfunction, hyperkalemia interactions. Lecture: administer diluted and through a straw. In thyroid storm, iodine is given after an antithyroid drug to avoid providing substrate for new hormone synthesis. |
Course vs current practice: The lecture labels RAI-131 as the preferred treatment and cites high single-dose success. Current ATA patient guidance presents antithyroid medication, radioactive iodine, and surgery as options chosen according to patient factors rather than one universal best treatment.
E. Hydrocortisone (Solu-Cortef) — glucocorticoid
Classification: Glucocorticoid / corticosteroid.
Action: Replaces cortisol and provides glucocorticoid anti-inflammatory/stress effects.
Indications: Chronic adrenal insufficiency; adrenal crisis; perioperative/stress coverage; adjunct in thyroid storm/myxedema coma when adrenal status is uncertain.
Routes: PO formulations; Solu-Cortef is IV/IM.
Adverse effects: Hyperglycemia, sodium/fluid retention, potassium loss, hypertension, infection risk/masked infection, GI irritation, bruising/poor wound healing, osteoporosis, HPA-axis suppression.
Nursing / teaching: Never stop chronic systemic steroids abruptly. Monitor glucose, BP, weight/edema, sodium/potassium, infection and GI symptoms; teach stress dosing and medical-alert/emergency injection plan for adrenal insufficiency.
F. Fludrocortisone (Florinef) — mineralocorticoid
Classification: Mineralocorticoid.
Action: Promotes renal sodium and water retention and potassium excretion, supporting circulating volume and blood pressure.
Indication: Mineralocorticoid replacement in primary adrenal insufficiency/Addison disease when aldosterone is deficient.
Route: PO.
Adverse effects: Hypertension, edema/fluid overload, potassium loss/hypokalemia, possible heart failure; steroid effects increase with higher/prolonged exposure.
Nursing / teaching: Monitor BP, daily weight/edema, sodium and potassium; assess orthostasis and hydration; follow individualized salt/fluid plan and dose adjustments.
G. Vasopressin (Pitressin) and desmopressin (DDAVP) — pituitary/ADH agents
| Drug | High-yield profile |
|---|---|
| Desmopressin (DDAVP) | Synthetic ADH analog with strong antidiuretic effect and less vasoconstriction. First-line replacement for central DI. Lecture routes: oral, intranasal, or injection. Major danger = water intoxication/hyponatremia; nasal forms can cause rhinitis/congestion. Monitor sodium, I/O, weight, neurologic symptoms; teach prescribed fluid guidance. |
| Vasopressin | Natural ADH/vasopressin with antidiuretic and vasoconstrictor effects. Historically used for DI; current U.S. IV product labeling is primarily for vasodilatory shock, while desmopressin is generally preferred for chronic central DI. Adverse effects include hyponatremia, ischemia, brady/tachyarrhythmias and reduced cardiac output; requires hemodynamic monitoring when used IV. Current U.S. route: IV. |
Medication memory: Levothyroxine replaces. Methimazole/PTU block synthesis. Propranolol controls adrenergic symptoms. SSKI blocks release/reduces vascularity. Hydrocortisone replaces cortisol. Fludrocortisone replaces aldosterone effect. DDAVP replaces ADH effect.
Exam review
One-page endocrine pattern review
LectureWeb supplementExam-focused synthesis of the full guide
| Disorder | Signature pattern | Priority treatment / nursing focus |
|---|---|---|
| DI | Polyuria + polydipsia + high serum osmolality/Na + dilute urine | Fluids + DDAVP for central DI; strict I/O, weight, Na, neuro. |
| SIADH | Hyponatremia + low serum osmolality + concentrated urine + neuro symptoms | Fluid restriction; seizure precautions; 3% saline for severe symptomatic cases with careful correction. |
| Hypothyroid | Low/slow/cold: bradycardia, constipation, weight gain, fatigue; primary = high TSH/low T4 | Levothyroxine; monitor cardiac status and myxedema coma. |
| Hyperthyroid / Graves | High/hot: tachycardia, weight loss, heat intolerance, anxiety; low TSH/high T4/T3; goiter/exophthalmos | Beta blocker + antithyroid therapy/RAI/surgery; eye care; watch thyroid storm. |
| Addison's | Low cortisol ± aldosterone: hypotension, weight loss, hyperpigmentation, low Na/high K, low glucose | Hydrocortisone ± fludrocortisone; stress dosing; crisis = IV steroid + fluids/dextrose. |
| Cushing | High cortisol: central obesity, moon face, buffalo hump, thin skin/striae, HTN, hyperglycemia, infection/osteoporosis | Treat source; protect skin/bone, monitor glucose/BP/infection; steroid taper if exogenous. |
| Pheochromocytoma | 5 Hs + episodic catecholamine spells; metanephrines high | Alpha blockade then surgery; beta only after alpha; minimize stimulation, monitor BP/ECG. |
Highest-yield lab opposites: DI vs SIADH: serum and urine concentration move in opposite directions. Primary thyroid disease: TSH usually moves opposite T3/T4. Addison vs Cushing: cortisol deficiency vs cortisol excess.
Sources
References and web supplement sources
Primary course sources
- DellaSalla, K., MSN, RN. STU_Endocrine_Pt1 - Tagged. NUR 123, County College of Morris, Fall 2026. 33-slide course lecture provided by the student.
- DellaSalla, K., MSN, RN. STU_Endocrine_Pt2 - Tagged. NUR 123, County College of Morris, Fall 2026. 28-slide course lecture provided by the student.
- Unit 6 Endocrine Study Guide. NUR 123 Basic Medical/Surgical Nursing, Spring 2024. Three-page course objective sheet provided by the student.
Web sources used to fill lecture gaps
W1. Merck Manual Professional — Arginine Vasopressin Deficiency (Central Diabetes Insipidus) — https://www.merckmanuals.com/professional/endocrine-and-metabolic-disorders/pituitary-disorders/arginine-vasopressin-deficiency-central-diabetes-insipidus
W2. Merck Manual Professional — Syndrome of Inappropriate ADH Secretion (SIADH) — https://www.merckmanuals.com/professional/nephrology/electrolyte-disorders/syndrome-of-inappropriate-adh-secretion-siadh
W3. Johns Hopkins Medicine — Endoscopic Pituitary Surgery — https://www.hopkinsmedicine.org/health/treatment-tests-and-therapies/endoscopic-pituitary-surgery
W4. Merck Manual Professional — Hypothyroidism — https://www.merckmanuals.com/professional/endocrine-and-metabolic-disorders/thyroid-disorders/hypothyroidism
W5. Merck Manual Professional — Hyperthyroidism — https://www.merckmanuals.com/professional/endocrine-and-metabolic-disorders/thyroid-disorders/hyperthyroidism
W6. American Thyroid Association — Thyroid Hormone Treatment — https://www.thyroid.org/thyroid-hormone-treatment/
W7. American Thyroid Association — Graves' Disease — https://www.thyroid.org/graves-disease/
W8. American Thyroid Association — Surgical Management of Graves' Disease — https://www.thyroid.org/surgical-management-graves-disease/
W9. MedlinePlus — Thyroid Gland Removal — https://medlineplus.gov/ency/article/002933.htm
W10. Merck Manual Professional — Treatment of Thyroid Storm — https://www.merckmanuals.com/professional/multimedia/table/treatment-of-thyroid-storm
W11. NIDDK — Diagnosis of Adrenal Insufficiency & Addison's Disease — https://www.niddk.nih.gov/health-information/endocrine-diseases/adrenal-insufficiency-addisons-disease/diagnosis
W12. NIDDK — Treatment for Adrenal Insufficiency & Addison's Disease — https://www.niddk.nih.gov/health-information/endocrine-diseases/adrenal-insufficiency-addisons-disease/treatment
W13. NIDDK — Adrenal Insufficiency & Addison's Disease: Definition & Facts — https://www.niddk.nih.gov/health-information/endocrine-diseases/adrenal-insufficiency-addisons-disease/definition-facts
W14. NIDDK — Cushing's Syndrome — https://www.niddk.nih.gov/health-information/endocrine-diseases/cushings-syndrome
W15. National Cancer Institute — Pheochromocytoma and Paraganglioma Treatment (PDQ) — https://www.cancer.gov/types/pheochromocytoma/hp/pheochromocytoma-treatment-pdq
W16. Mayo Clinic — Pheochromocytoma: Symptoms and Causes — https://www.mayoclinic.org/diseases-conditions/pheochromocytoma/symptoms-causes/syc-20355367
W17. Endocrine Society / Endocrine Reviews — Management of Pheochromocytoma — https://www.endocrine.org/journals/endocrine-reviews/management-of-pheochromocytoma
W18. NCSBN — Delegation — https://www.ncsbn.org/nursing-regulation/practice/delegation.page
W19. DailyMed — Levothyroxine Sodium Tablets — https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=65b266af-72a5-4409-ab55-bd14341135aa
W20. DailyMed — Methimazole Tablets — https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=06bb4bcc-5e47-48b6-a76c-648f846704e8
W21. DailyMed — Propylthiouracil Tablets — https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=a032648a-a6e4-4356-a483-8eee03779030
W22. DailyMed — Propranolol Hydrochloride Tablets — https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=29ace768-8fef-482b-e063-6394a90aa2ac
W23. DailyMed — SSKI Potassium Iodide Oral Solution — https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=ca1d3449-ea29-49a4-8863-365ec95f1553
W24. DailyMed — Solu-Cortef — https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=386942d3-c75f-25f1-e063-6394a90a5af2
W25. DailyMed — Fludrocortisone Acetate Tablets — https://dailymed.nlm.nih.gov/dailymed/fda/fdaDrugXsl.cfm?setid=001e72ea-2c9e-468c-90cc-6c347234e2a9&type=display
W26. DailyMed — Desmopressin Acetate Nasal Solution — https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=ceee4883-6c49-4538-a747-354d0743b221
W27. DailyMed — Vasopressin Injection — https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=ad3ac280-49da-4816-9097-14517d0c0f85
W28. Merck Manual Professional — Overview of the Endocrine System — https://www.merckmanuals.com/professional/endocrine-and-metabolic-disorders/principles-of-endocrinology/overview-of-the-endocrine-system
W29. Merck Manual Consumer — Endocrine Function — https://www.merckmanuals.com/home/hormonal-and-metabolic-disorders/biology-of-the-endocrine-system/endocrine-function
W30. DailyMed — Sodium Iodide I-131, therapeutic, for oral use — https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=380e8e26-0625-4233-b36e-afb9f66e8a77
Use for school questions: When a course-specific statement conflicts with a current source, know the professor lecture wording for the exam, but use current evidence and facility policy for real clinical care. The source guide explicitly flags the biggest differences: Cushing terminology, RAI preference, and vasopressin use.