NLE Endocrine & Metabolic Nursing — Pituitary, Thyroid & Parathyroid DisordersRevision Notes

Formulas

Exam Tips

• NLE SHORTCUT: SIADH = Soaked (fluids in, restrict fluids, low Na, high urine SG). DI = Dry (fluids out, replace fluids, high Na, low urine SG).
• Lab pattern to memorize: SIADH — serum Na LOW, serum Osm LOW, urine Na HIGH, urine Osm HIGH, urine SG HIGH. DI — serum Na HIGH, serum Osm HIGH, urine SG LOW.
• If the question asks 'what is the PRIORITY nursing intervention for SIADH?' — answer: FLUID RESTRICTION.
• If the question asks 'what drug is given for central DI?' — answer: Desmopressin (DDAVP).
• Neuro changes (confusion, seizures) in SIADH are from HYPONATREMIA — seizure precautions are a nursing priority.
• Watch for questions that ask about DAILY WEIGHT — this is the most accurate way to monitor fluid balance in both SIADH and DI.

Key Points

• Antidiuretic hormone (ADH/vasopressin) is produced in the hypothalamus and released from the POSTERIOR pituitary — it tells the kidneys to RETAIN water.
• SIADH = TOO MUCH ADH → water retention → DILUTIONAL HYPONATREMIA (low serum sodium). Think: 'Soaked' — the body is waterlogged.
• Diabetes Insipidus (DI) = TOO LITTLE ADH (or kidney unresponsiveness) → massive water LOSS → HYPERNATREMIA (high serum sodium). Think: 'Dry' — the body is losing water rapidly.
• DI has NOTHING to do with blood sugar — the word 'diabetes' here simply means 'passing through' (excessive urination).
• Central DI: problem is in the pituitary/hypothalamus — NOT enough ADH made or released. Treated with DDAVP (desmopressin).
• Nephrogenic DI: kidneys do not respond to ADH — treat the cause; thiazide diuretics paradoxically help.
• SIADH causes: small-cell lung cancer (ectopic ADH), CNS disorders (head trauma, meningitis), certain drugs (carbamazepine, SSRIs, vincristine), post-surgery stress.
• SIADH key labs: LOW serum sodium (<135 mEq/L), LOW serum osmolality (<275 mOsm/kg), HIGH urine sodium (>20 mEq/L), HIGH urine osmolality, HIGH urine specific gravity (>1.020).
• DI key labs: HIGH serum sodium (>145 mEq/L), HIGH serum osmolality (>295 mOsm/kg), LOW urine specific gravity (<1.005), LOW urine osmolality.
• SIADH priority nursing intervention: FLUID RESTRICTION (800–1000 mL/day is the cornerstone of management).
• DI priority nursing intervention: REPLACE FLUIDS to match massive output; administer DDAVP for central DI.
• CRITICAL: In SIADH, correct sodium SLOWLY — rapid correction of hyponatremia causes OSMOTIC DEMYELINATION SYNDROME (ODS/central pontine myelinolysis). Rate: no faster than 8–12 mEq/L per 24 hours.
• Hypertonic saline (3% NaCl) is used CAUTIOUSLY in severe/symptomatic SIADH (seizures, coma) — only in ICU setting.
• Vaptans (e.g., tolvaptan, conivaptan) are vasopressin-receptor antagonists used for SIADH — they block ADH's effect, allowing free water excretion.
• Nursing priorities for BOTH: strict I&O, daily weight (same time, same scale, same clothing), serum sodium monitoring, and NEURO/LOC assessment — neurological deterioration from sodium imbalance is life-threatening.
• SIADH: enforce fluid restriction even when patient is thirsty (this is a nursing challenge — patient education is key).
• DI: NEVER restrict water in a conscious DI patient — they must be able to compensate by drinking.

Definitions

Section Title

Posterior Pituitary: ADH Disorders — SIADH vs. Diabetes Insipidus

Common Mistakes

• Confusing DI with diabetes mellitus — DI is a water regulation disorder, NOT a blood sugar disorder.
• Thinking SIADH patients need sodium supplementation as the FIRST intervention — fluid restriction is the cornerstone, not sodium replacement (unless severe symptomatic hyponatremia).
• Forgetting that urine findings in SIADH and DI are OPPOSITE to serum findings: SIADH has concentrated urine (high SG) but dilute serum (low Na); DI has dilute urine (low SG) but concentrated serum (high Na).
• Correcting hyponatremia too fast — this is a patient safety error. Always correct slowly (max 8–12 mEq/L per 24 hours) to prevent osmotic demyelination.
• Restricting fluids in a conscious DI patient — this is dangerous and incorrect. They MUST have access to water.
• Mixing up DDAVP side effects: over-treatment with DDAVP in DI causes water retention (manifests as SIADH-like symptoms: headache, weight gain, low sodium).

Exam Tips

• THYROID STORM 'MUST-KNOW' drug sequence: Beta-blocker (propranolol) + PTU (antithyroid + blocks conversion) + Iodine (given AFTER PTU) + Corticosteroids + Cooling (NOT aspirin).
• Post-thyroidectomy: AIRWAY is Priority 1 (Maslow's physiological). Keep trach set/O2/suction at bedside. This is tested repeatedly.
• Labs for hyperthyroidism: HIGH T3 and T4 + LOW TSH. This inverse relationship is the key to identifying primary thyroid disease.
• Graves' disease = autoimmune + exophthalmos + diffuse goiter. These are the specific findings that differentiate it.
• PTU vs. Methimazole: PTU is preferred in PREGNANCY (first trimester) and THYROID STORM (blocks peripheral conversion of T4 to T3). Methimazole is used for long-term management.
• If the NLE question describes 'sore throat and fever in a patient on antithyroid drugs' — the answer is AGRANULOCYTOSIS. Stop the drug and check CBC.

Key Points

• The thyroid gland produces T3 (triiodothyronine) and T4 (thyroxine), which control the body's METABOLIC RATE — think of it as the body's 'thermostat and engine speed.'
• TSH (Thyroid-Stimulating Hormone) from the ANTERIOR pituitary drives the thyroid. TSH and thyroid hormones have an INVERSE (opposite) relationship in primary disease.
• TSH is the MOST SENSITIVE screening test for thyroid disorders: LOW TSH = hyperthyroid (gland is overactive, feedback suppresses TSH). HIGH TSH = hypothyroid (gland underactive, pituitary pumps out more TSH).
• Graves' Disease is the most common cause of hyperthyroidism — it is an AUTOIMMUNE disorder where antibodies (TSI) stimulate the TSH receptor, causing excess hormone production.
• Graves' disease-specific signs: EXOPHTHALMOS (proptosis/bulging eyes) and diffuse GOITER — these are unique to Graves' and won't appear with other causes of hyperthyroidism.
• Hyperthyroidism manifestations: EVERYTHING SPED UP — tachycardia, palpitations, hypertension, atrial fibrillation, weight loss WITH increased appetite, heat intolerance, diaphoresis (excessive sweating), nervousness, tremor, insomnia, diarrhea, warm moist skin, fine hair.
• Diagnostics for hyperthyroidism: ELEVATED T3 and T4 + SUPPRESSED (LOW) TSH + elevated RAIU (radioactive iodine uptake).
• Antithyroid drugs: METHIMAZOLE and PTU (propylthiouracil) — they BLOCK thyroid hormone synthesis. Effect takes WEEKS (not immediate). PTU is preferred in FIRST TRIMESTER of pregnancy and in thyroid storm (also blocks T4→T3 conversion).
• CRITICAL side effect of antithyroid drugs: AGRANULOCYTOSIS (bone marrow suppression) — teach patient to report SORE THROAT, FEVER, or UNUSUAL BLEEDING immediately.
• Beta-blockers (propranolol): given for SYMPTOM CONTROL (tachycardia, tremor, palpitations) — they do NOT reduce thyroid hormone levels.
• Lugol's iodine/SSKI: given BEFORE thyroid surgery to reduce gland vascularity (makes it less vascular/bloody during surgery). Must be given AFTER antithyroid drugs have been started, DILUTED in juice, and through a STRAW (prevents teeth staining).
• Radioactive iodine (I-131): ablates (destroys) thyroid tissue. Most patients eventually become HYPOTHYROID and need lifelong levothyroxine. Radiation safety precautions: avoid close contact with pregnant women and young children for a few days.
• High-calorie diet needed in hyperthyroidism — increased metabolic rate burns more calories.
• Eye care for exophthalmos: artificial tears/lubricating eye drops, sunglasses for photophobia, elevate head of bed, tape eyelids if unable to close completely.
• Cool, calm, quiet environment is a nursing priority — reduces stimulation and metabolic demand.
• POST-THYROIDECTOMY PRIORITIES (HIGH-YIELD NLE): (1) Semi-Fowler's position — reduces neck strain, promotes drainage. (2) Keep TRACHEOSTOMY SET, OXYGEN, and SUCTION at the bedside — airway obstruction from edema or hemorrhage is the TOP priority. (3) Check BEHIND the neck and under the dressing — blood pools posteriorly, not just at the front incision. (4) Monitor voice/hoarseness — indicates laryngeal nerve damage. (5) Monitor for HYPOCALCEMIA/TETANY — accidental removal of parathyroid glands is a post-op complication. Check Chvostek's and Trousseau's signs. CALCIUM GLUCONATE must be at the bedside.

Definitions

Section Title

Thyroid Disorders — Hyperthyroidism & Thyroid Storm

Common Mistakes

• Giving ASPIRIN for fever in thyroid storm — CRITICAL ERROR. Aspirin displaces thyroid hormone from protein-binding sites, INCREASING free hormone levels and worsening the crisis. Use acetaminophen and cooling blankets instead.
• Forgetting to check BEHIND the neck for post-thyroidectomy hemorrhage — blood pools posteriorly, not just at the visible dressing.
• Thinking beta-blockers (propranolol) TREAT hyperthyroidism — they only control SYMPTOMS (tachycardia, tremor). They do NOT lower thyroid hormone levels.
• Giving Lugol's iodine BEFORE starting antithyroid drugs — iodine must be given AFTER antithyroid drugs to prevent the gland from using the iodine to make MORE hormone initially.
• Expecting immediate results from antithyroid drugs — these take WEEKS to reduce hormone levels. Propranolol provides faster symptom relief.
• Forgetting to place calcium gluconate at the bedside post-thyroidectomy — accidental parathyroid removal causes hypocalcemia.

Exam Tips

• HYPOTHYROIDISM MNEMONIC: Everything is COLD and SLOW — Cold intolerance, Obesity/weight gain, Low heart rate (bradycardia), Depression/lethargy.
• KEY LABS: Low T3/T4 + HIGH TSH = hypothyroidism (pituitary 'screaming' at a failing gland).
• Myxedema coma 4 HYPOs: Hypothermia, Hypotension, Hypoglycemia, Hypoventilation. AIRWAY IS PRIORITY 1.
• Levothyroxine nursing: Empty stomach + morning + separate from Ca/Fe/antacids = the classic NLE patient teaching question.
• Loss of OUTER THIRD OF EYEBROWS = classic hypothyroidism exam clue. Always flag this in clinical vignettes.
• NLE comparison question: Thyroid storm = HOT (hyperpyrexia, tachycardia, agitation). Myxedema coma = COLD (hypothermia, bradycardia, coma).

Key Points

• Hypothyroidism = insufficient thyroid hormone → SLOWED METABOLISM. Think: everything 'slows down.'
• Most common cause in the Philippines and worldwide: HASHIMOTO'S THYROIDITIS (autoimmune destruction of thyroid tissue). Also caused by post-I-131 therapy, post-thyroidectomy, iodine deficiency (common in endemic goiter areas of the Philippines like mountain provinces), and certain drugs (amiodarone, lithium).
• Manifestations: EVERYTHING SLOWED DOWN — weight gain, cold intolerance (feels cold when others are warm), fatigue/lethargy, BRADYCARDIA, constipation, dry and coarse skin, hair loss (especially the outer third of eyebrows — a classic NLE clue), depression, slowed cognition, and non-pitting periorbital/facial edema (MYXEDEMA).
• Myxedema: the distinctive non-pitting facial edema of hypothyroidism — puffy face, swollen eyelids, thickened tongue. NOT the same as the emergency (myxedema COMA).
• Diagnostics: LOW T3 and T4 + HIGH TSH (in primary hypothyroidism — pituitary is 'shouting louder' to stimulate a failing thyroid).
• Treatment: LEVOTHYROXINE (Synthroid) — synthetic T4, must be taken LIFELONG.
• Levothyroxine administration: EMPTY STOMACH, 30–60 minutes BEFORE BREAKFAST, same time every morning, separate from calcium supplements/iron/antacids/food by at least 4 hours (they impair absorption).
• NEVER STOP LEVOTHYROXINE ABRUPTLY — can precipitate myxedema coma.
• START LOW AND GO SLOW in OLDER ADULTS and CARDIAC PATIENTS — too-rapid dosing increases myocardial oxygen demand, risking angina or arrhythmia.
• Monitor for signs of OVER-replacement (iatrogenic hyperthyroidism): palpitations, tachycardia, weight loss, heat intolerance, nervousness.
• MYXEDEMA COMA — life-threatening emergency: severe, decompensated hypothyroidism. Precipitating factors: cold exposure, infection, sedatives/opioids in an untreated hypothyroid patient.
• Signs of myxedema coma (the '4 HYPOs'): HYPOTHERMIA, HYPOTENSION, HYPOGLYCEMIA, HYPOVENTILATION (CO2 retention). Plus: decreased level of consciousness → coma.
• Management of myxedema coma: (1) AIRWAY support / mechanical ventilation for hypoventilation. (2) IV LEVOTHYROXINE (T4) IV. (3) WARM GRADUALLY — passive rewarming only (external warming causes vasodilation and worsening hypotension/shock). (4) IV fluids and glucose for hypotension/hypoglycemia. (5) CORTICOSTEROIDS (adrenal insufficiency may coexist). (6) Treat the precipitating trigger.
• WARNING: Do NOT actively/aggressively rewarm a myxedema coma patient — use passive rewarming (blankets). Active external warming causes peripheral vasodilation and cardiovascular collapse.
• NANDA nursing diagnoses for hypothyroidism: Activity Intolerance (bradycardia, fatigue); Constipation; Risk for Impaired Skin Integrity (dry skin); Disturbed Thought Processes (slowed cognition).
• Patient teaching: levothyroxine is a lifelong medication — skipping doses leads to return of symptoms; never adjust dose without physician guidance; report chest pain, palpitations, or worsening symptoms.

Definitions

Section Title

Thyroid Disorders — Hypothyroidism & Myxedema Coma

Common Mistakes

• Actively/aggressively rewarming a myxedema coma patient — this causes vasodilation and cardiovascular collapse (hypotension/shock). Use PASSIVE rewarming (blankets) only.
• Expecting rapid symptom improvement with levothyroxine — effects are gradual (4–6 weeks for full effect). Patients must be counseled about patience.
• Starting full-dose levothyroxine in elderly or cardiac patients — must start with LOW dose and increase gradually (titrate up) to prevent angina or arrhythmia.
• Forgetting that hypothyroidism causes BRADYCARDIA, not tachycardia — a common confusion when contrasting with hyperthyroidism.
• Mistaking myxedema (the facial edema finding) for myxedema COMA — these are different. Myxedema is a clinical finding; myxedema coma is an emergency state.
• Telling patients to take levothyroxine with breakfast or coffee — impairs absorption. Must be taken on empty stomach 30–60 minutes before eating.

Formulas

Exam Tips

• MEMORY HOOK: PTH RAISES Calcium, LOWERS Phosphate. 'P(T)H and P(hosphate) are enemies — when PTH goes UP, phosphate goes DOWN.'
• HYPERPARATHYROIDISM = HIGH Ca + LOW PO4 = Bones, Stones, Groans, Psychiatric Moans.
• HYPOPARATHYROIDISM = LOW Ca + HIGH PO4 = TETANY + Chvostek's + Trousseau's + Seizures + Laryngospasm.
• POST-THYROIDECTOMY question about tingling and muscle spasms = HYPOPARATHYROIDISM/HYPOCALCEMIA. Priority action: check Chvostek's and Trousseau's, have calcium gluconate IV ready.
• Trousseau's sign is MORE SENSITIVE AND SPECIFIC than Chvostek's for hypocalcemia — remember this for NLE comparison questions.
• Diuretic choice: Furosemide (loop) = LOWERS calcium (used in hypercalcemia). Thiazides = RAISE calcium (AVOID in hypercalcemia).

Key Points

• The four PARATHYROID GLANDS are embedded in the posterior thyroid gland. They secrete PARATHYROID HORMONE (PTH).
• PTH's main job: RAISE SERUM CALCIUM. It does this by: (1) Pulling calcium OUT of BONE (osteoclast activation → bone resorption), (2) Increasing RENAL reabsorption of calcium, (3) Activating Vitamin D → increases GI calcium absorption.
• CALCIUM AND PHOSPHATE MOVE IN OPPOSITE DIRECTIONS: PTH raises calcium and LOWERS phosphate (PTH promotes phosphate excretion in urine).
• Normal serum calcium: 8.5–10.5 mg/dL. Values outside this range are clinically significant.
• HYPERPARATHYROIDISM = TOO MUCH PTH → HIGH calcium (HYPERCALCEMIA) + LOW phosphate (HYPOPHOSPHATEMIA).
• Classic mnemonic for hyperparathyroidism: 'Bones, Stones, Groans, and Psychiatric Moans.' Bones = bone pain, pathological fractures; Stones = kidney stones (nephrolithiasis); Groans = GI problems (constipation, nausea, peptic ulcers, pancreatitis); Psychiatric Moans = fatigue, depression, confusion, altered mental status.
• Management of hyperparathyroidism: HYDRATION with IV normal saline + LOOP DIURETICS (furosemide) to promote urinary calcium excretion. BISPHOSPHONATES (e.g., pamidronate) and CALCITONIN to reduce calcium. PARATHYROIDECTOMY is the definitive treatment. Nursing: encourage MOBILITY (reduces bone calcium loss), encourage oral FLUIDS, STRAIN URINE for kidney stones, SAFETY precautions for weak bones.
• Avoid thiazide diuretics in hypercalcemia — they INCREASE calcium reabsorption and worsen hypercalcemia. Use LOOP DIURETICS (furosemide) instead.
• HYPOPARATHYROIDISM = TOO LITTLE PTH → LOW calcium (HYPOCALCEMIA) + HIGH phosphate (HYPERPHOSPHATEMIA).
• Most common cause: ACCIDENTAL REMOVAL OF PARATHYROID GLANDS during thyroid or neck surgery — this is why calcium gluconate must be at the bedside post-thyroidectomy.
• Manifestations of hypocalcemia (LOW calcium → increased neuromuscular excitability — the nerves and muscles become hyperexcitable): TETANY, numbness and tingling (perioral, fingertips, toes), muscle cramps, LARYNGOSPASM (life-threatening — can obstruct airway), bronchospasm, and SEIZURES.
• CHVOSTEK'S SIGN: Tap the facial nerve in front of the ear → ipsilateral facial twitching = POSITIVE (indicates hypocalcemia).
• TROUSSEAU'S SIGN: Inflate blood pressure cuff on arm above systolic BP for 3 minutes → CARPAL SPASM (wrist/hand flexion) = POSITIVE (indicates hypocalcemia). Trousseau's is MORE SPECIFIC and SENSITIVE than Chvostek's.
• Management of acute hypocalcemia/tetany: IV CALCIUM GLUCONATE (slowly — monitor for bradycardia/arrhythmia during infusion). Long-term: ORAL CALCIUM SUPPLEMENTS + ACTIVE VITAMIN D (calcitriol — because PTH is needed to activate Vitamin D, so in hypoparathyroidism, you must give the ACTIVE form).
• Diet for hypoparathyroidism: HIGH CALCIUM, LOW PHOSPHATE diet.
• Nursing: seizure precautions, airway precautions (laryngospasm risk), quiet environment, keep CALCIUM GLUCONATE at bedside.
• NANDA nursing diagnoses: Risk for Injury (seizures, fractures); Acute Pain (bone pain, muscle cramps); Risk for Decreased Cardiac Output (arrhythmias from electrolyte imbalance).

Definitions

Section Title

Parathyroid Disorders — Hyperparathyroidism & Hypoparathyroidism

Common Mistakes

• Using THIAZIDE diuretics for hypercalcemia — WRONG. Thiazides INCREASE calcium reabsorption. Use LOOP DIURETICS (furosemide) for hypercalcemia.
• Forgetting that calcium and phosphate move in OPPOSITE directions: in hyperparathyroidism, calcium is HIGH and phosphate is LOW. In hypoparathyroidism, calcium is LOW and phosphate is HIGH.
• Thinking Vitamin D supplements alone (ergocalciferol/cholecalciferol) are sufficient in hypoparathyroidism — patients need ACTIVE Vitamin D (calcitriol) because PTH is required to activate Vitamin D in the kidneys, and PTH is absent.
• Not checking for laryngospasm in hypocalcemia — this can obstruct the airway and is a life-threatening complication. Always have airway management equipment ready.
• Confusing the direction of signs: HYPERCALCEMIA causes muscle WEAKNESS (calcium depresses neuromuscular excitability). HYPOCALCEMIA causes muscle HYPEREXCITABILITY (tetany, spasms). Think: 'too much calcium = relaxed/weak; too little calcium = tight/spastic.'
• Forgetting to check BEHIND the neck post-thyroidectomy for hemorrhage that could indicate accidental parathyroid disruption or bleeding.

Exam Tips

• MASTER THE PAIRS: For every disorder in this chapter, know the opposite. NLE loves paired-opposite MCQs.
• USE THE HORMONE'S FUNCTION to reason out EVERY symptom and lab finding: PTH raises Ca → too much PTH = too high Ca; too little PTH = too low Ca. No memorization needed if you know the hormone's job.
• EMERGENCY RECOGNITION is the most high-stakes skill: thyroid storm (hot, fast, agitated), myxedema coma (cold, slow, unconscious), hypocalcemic tetany/laryngospasm (spasms, stridor after neck surgery), SIADH seizures (confusion, seizures with low sodium).
• APPLY MASLOW'S in every priority question: Airway > Breathing > Circulation > Safety > Psychosocial.
• DRUG MNEMONICS: 'PTU for Pregnancy and Thyroid storm. Methimazole for Maintenance.' 'Furosemide for Falling calcium from hypercalcemia.' 'Calcium Gluconate for tetany after neck surgery.'
• REVIEW RA 9173 scope of nursing practice — the NLE may ask about legal/ethical accountability when nurses fail to recognize or act on endocrine emergencies.

Key Points

• PAIRED OPPOSITES SUMMARY — ADH Disorders: SIADH (too much ADH) = water retention, low Na, high urine SG, restrict fluids. DI (too little ADH) = water loss, high Na, low urine SG, replace fluids + DDAVP.
• PAIRED OPPOSITES SUMMARY — Thyroid: Hyperthyroidism = ↑T3/T4, ↓TSH, everything fast, antithyroid drugs + beta-blockers, THYROID STORM emergency. Hypothyroidism = ↓T3/T4, ↑TSH, everything slow, levothyroxine, MYXEDEMA COMA emergency.
• PAIRED OPPOSITES SUMMARY — Parathyroid: Hyperparathyroidism = ↑PTH, ↑Ca, ↓PO4, 'bones stones groans moans,' hydrate + furosemide + parathyroidectomy. Hypoparathyroidism = ↓PTH, ↓Ca, ↑PO4, tetany/spasms, IV calcium gluconate + oral Ca + active Vit D.
• THYROID STORM vs. MYXEDEMA COMA: Storm = hyperpyrexia + severe tachycardia + agitation → Cool (no aspirin) + propranolol + PTU + iodine + steroids. Coma = hypothermia + bradycardia + hypoventilation + coma → Airway + IV levothyroxine + PASSIVE warming + glucose + steroids.
• POST-THYROIDECTOMY BEDSIDE ESSENTIALS: Tracheostomy set + oxygen + suction (airway emergency), calcium gluconate (hypocalcemia), check BEHIND neck for hemorrhage.
• PRIORITY NURSING DIAGNOSES by disorder: SIADH = Risk for Injury (seizures from hyponatremia), Excess Fluid Volume. DI = Deficient Fluid Volume, Risk for Electrolyte Imbalance. Hyperthyroidism = Decreased Cardiac Output (tachycardia/AF), Imbalanced Nutrition (weight loss). Hypothyroidism = Activity Intolerance, Constipation. Hyperparathyroidism = Risk for Injury (fractures), Acute Pain. Hypoparathyroidism = Risk for Injury (seizures, laryngospasm), Ineffective Airway Clearance.
• MEDICATION TEACHING SUMMARY: Levothyroxine — empty stomach, morning, lifelong, separate from Ca/Fe/antacids, never stop abruptly. Antithyroid drugs — report fever/sore throat (agranulocytosis). DDAVP — monitor for water retention (over-treatment). Lugol's iodine — dilute, give through straw, after antithyroid drugs.
• MASLOW PRIORITIZATION: Airway and breathing (Maslow's Level 1 physiological) ALWAYS comes first. In post-thyroidectomy, laryngospasm/airway obstruction > hemorrhage > hypocalcemia in terms of immediate threat to life.
• Under RA 9173 (Philippine Nursing Act of 2002), nurses are legally accountable for competent assessment, planning, intervention, and evaluation in endocrine emergencies. Failure to recognize thyroid storm, myxedema coma, or post-thyroidectomy complications and to act promptly constitutes professional negligence.
• Philippine healthcare context: In DOH facilities and PhilHealth-accredited hospitals, thyroid disorders are among the most common endocrine admissions. Goiter prevalence remains significant in iodine-deficient regions. Community health nurses play a key role in promoting iodized salt use (Universal Salt Iodization program) and screening for thyroid enlargement during community health assessments.

Definitions

Section Title

Comparison Summary Table & High-Yield NLE Review

Common Mistakes

• Failing to apply Maslow's hierarchy in priority questions — always address AIRWAY first.
• Not differentiating post-thyroidectomy hypocalcemia from the generic hypocalcemia of hypoparathyroidism — context matters: post-op hypocalcemia is from accidental parathyroid gland removal.
• Confusing which hormone is raised in which disorder — use the table: PTH up = Ca up, PO4 down; PTH down = Ca down, PO4 up.
• Forgetting that TSH is the MOST SENSITIVE thyroid screening test — directly correlates with primary thyroid dysfunction before T3/T4 become abnormal.
• Treating all endocrine emergencies with the same initial intervention — each has a unique priority: SIADH = restrict fluids; DI = replace fluids; Thyroid storm = cool + beta-block + antithyroid; Myxedema coma = airway + IV levothyroxine + passive warming; Hypoparathyroidism = IV calcium gluconate.