Metabolic Disorders & Endocrinology Nursing

Comprehensive clinical reference for GCC-registered nurses. Evidence-based protocols covering metabolic syndrome, adrenal and pituitary disorders, thyroid emergencies, calcium disorders, and endocrine crises. Aligned with DHA, DOH, SCFHS, and MOH examination standards.

Metabolic Syndrome — Diagnostic Criteria (IDF/AHA/NHLBI Joint Statement)

Diagnosis requires 3 of 5 criteria. Any three qualifies, regardless of which three.

ComponentThresholdNotes
Central ObesityWaist >94 cm (male, Europid) / >80 cm (female, Europid)GCC Arab populations use same IDF Europid thresholds. Adipose distribution key driver.
Triglycerides≥1.7 mmol/L or on TG-lowering RxFasting sample preferred. Fibrates/omega-3 used in treatment.
HDL-Cholesterol<1.0 mmol/L (male) / <1.3 mmol/L (female) or on HDL-raising RxLow HDL strongly associated with CVD risk in GCC populations.
Blood Pressure≥130/85 mmHg or on antihypertensive RxHypertension component; even stage-1 HTN counts.
Fasting Glucose≥5.6 mmol/L or on glucose-lowering Rx (T2DM qualifies)Impaired fasting glucose or established T2DM both count.
GCC Prevalence: Metabolic syndrome affects an estimated 35–40% of adult GCC populations — among the highest rates globally. Prevalence is driven by high-calorie diet, sedentary lifestyle, genetic predisposition, and Vitamin D deficiency.
Insulin Resistance — Pathophysiology
  • Cells fail to respond normally to insulin signalling; pancreatic β-cells compensate with hyperinsulinaemia
  • Excess adipose tissue (visceral > subcutaneous) releases free fatty acids and pro-inflammatory cytokines (TNF-α, IL-6), impairing insulin receptor signalling
  • Hepatic glucose output increases; skeletal muscle glucose uptake decreases
  • Progressive β-cell exhaustion leads to overt T2DM
  • Hyperinsulinaemia promotes dyslipidaemia, hypertension, NAFLD
HOMA-IR Formula
HOMA-IR = [Fasting Insulin (µU/mL) × Fasting Glucose (mmol/L)] ÷ 22.5

HOMA-IR >2.5–3.0 suggests significant insulin resistance (clinical cut-offs vary).

Vitamin D Deficiency in GCC
Near-universal deficiency in GCC populations due to indoor lifestyle, modest traditional clothing, deliberate sun avoidance in extreme heat, and darker skin pigmentation.
  • Vitamin D <50 nmol/L: deficiency; <25 nmol/L: severe deficiency
  • Vitamin D receptors present on pancreatic β-cells and insulin-sensitive tissues
  • Deficiency exacerbates insulin resistance and impairs insulin secretion
  • Associated with higher rates of metabolic syndrome, T2DM, CVD
Supplementation Protocols (GCC National Guidelines)
  • Maintenance: 1,000–2,000 IU/day (adult)
  • Deficiency correction: 50,000 IU weekly for 8 weeks, then maintenance
  • Monitor: 25(OH)D level at 3–6 months post-correction
  • Target: 75–125 nmol/L (30–50 ng/mL)
Obesity Management — Stepwise Approach
Lifestyle Interventions
  • Mediterranean / Low-GI diet: high fibre, unsaturated fats, complex carbohydrates
  • Calorie restriction: deficit of 500–750 kcal/day (evidence-based)
  • Physical activity: ≥150 min moderate-intensity/week (e.g., brisk walking); muscle-strengthening 2×/week
  • Behavioural counselling; cultural dietary adaptations
Pharmacological Options
  • Orlistat: pancreatic lipase inhibitor; reduces fat absorption by ~30%; GI side-effects; fat-soluble vitamin supplementation required
  • GLP-1 Receptor Agonists: Semaglutide (Wegovy) — up to 15% weight loss; Liraglutide (Saxenda) — 5–10%
  • Naltrexone/Bupropion (Contrave): reduces appetite via hypothalamic pathway
  • SGLT2 inhibitors: modest weight loss + cardiometabolic/renal benefit
Bariatric Surgery (GCC Context)
  • Indicated: BMI ≥40 or BMI ≥35 + comorbidity; after failed medical therapy
  • Sleeve gastrectomy: most common in GCC; reduces ghrelin, restricts volume
  • Roux-en-Y gastric bypass: malabsorptive + restrictive; superior glycaemic outcomes in T2DM
  • Nursing: pre-op nutritional optimisation; post-op: VTE prophylaxis, nutritional supplementation, blood glucose monitoring, psychological support
Adrenal Anatomy — Cortex & Medulla
Zone / RegionHormone ProducedPrimary Action
Cortex — Zona Glomerulosa (outer)Mineralocorticoids (Aldosterone)Na+ retention, K+ excretion, water retention; regulated by renin-angiotensin
Cortex — Zona Fasciculata (middle)Glucocorticoids (Cortisol)Stress response, gluconeogenesis, immune suppression; regulated by ACTH
Cortex — Zona Reticularis (inner)Androgens (DHEA, androstenedione)Precursor sex steroids; regulated by ACTH
MedullaCatecholamines (Adrenaline 80%, Noradrenaline 20%)Fight-or-flight response; regulated by sympathetic NS
Cushing's Syndrome — Cortisol Excess
Clinical Features
Central obesityBuffalo humpMoon facePurple striaeThin skin / easy bruisingProximal myopathyHypertensionHyperglycaemiaOsteoporosisHypokalaemiaImmunosuppression
Aetiology
TypeCauseACTH Level
ACTH-Dependent (80%)Cushing's disease — pituitary adenoma (70%); Ectopic ACTH — SCLC, carcinoidElevated
ACTH-Independent (20%)Adrenal adenoma or carcinoma; Exogenous steroids (commonest cause)Suppressed
Investigations
  • 24-hour urinary free cortisol: elevated (>2× ULN diagnostic)
  • Overnight dexamethasone suppression test (1 mg): morning cortisol >50 nmol/L = failure to suppress
  • Late-night salivary cortisol: elevated (cortisol normally nadir at midnight)
  • MRI pituitary / CT adrenal for localisation
Management
  • Pituitary adenoma: trans-sphenoidal surgery (first-line)
  • Steroidogenesis inhibitors: ketoconazole (blocks CYP450), metyrapone (blocks 11β-hydroxylase)
  • Post-op: adrenal insufficiency expected — hydrocortisone replacement until HPA axis recovers
Addison's Disease — Primary Adrenal Insufficiency
Aetiology
  • Autoimmune adrenalitis (70–80% in developed nations) — 21-hydroxylase antibodies
  • TB (historically common; GCC context: relevant in expatriate workers from TB-endemic regions)
  • Bilateral adrenal haemorrhage (Waterhouse-Friderichsen in meningococcaemia), metastases, fungal
Clinical Features
Fatigue / weaknessWeight loss / anorexiaHyperpigmentation (ACTH/MSH cross-reactivity)Postural hypotensionHyponatraemiaHyperkalaemiaHypoglycaemiaSalt craving
Investigations
  • 8 am serum cortisol: <100 nmol/L strongly suggestive; >500 nmol/L excludes
  • Short Synacthen (ACTH stimulation) test: peak cortisol <500 nmol/L = insufficient
  • ACTH elevated (distinguishes primary from secondary)
Replacement Therapy
  • Hydrocortisone 15–25 mg/day in divided doses (2/3 morning, 1/3 afternoon)
  • Fludrocortisone 50–200 mcg/day (mineralocorticoid replacement)
  • Sick day rules: double/triple dose during illness, surgery, or significant stress; IM hydrocortisone kit prescribed for emergencies
Addisonian Crisis — EMERGENCY
ACUTE ADRENAL INSUFFICIENCY — LIFE-THREATENING. Triggered by: physiological stress (infection, surgery, injury) in a patient with known/undiagnosed adrenal insufficiency or on long-term steroids. Do NOT wait for investigation results before treating.
Clinical Presentation
  • Severe vomiting and diarrhoea
  • Profound hypotension / circulatory shock
  • Confusion, reduced GCS, coma
  • Severe abdominal pain
  • Hypoglycaemia, hyponatraemia, hyperkalaemia
  • Fever (infection trigger)
Immediate Management
  1. Hydrocortisone 100 mg IV bolus immediately
  2. Hydrocortisone 200 mg/24h by continuous IV infusion (or 50 mg IV q6h)
  3. 0.9% NaCl 1L stat IV (correct hypovolaemia; also corrects Na)
  4. IV dextrose if hypoglycaemic (<4 mmol/L)
  5. Identify and treat precipitating cause (antibiotics if sepsis)
  6. Continuous monitoring: BP, HR, GCS, glucose, electrolytes
  7. ICU/HDU escalation
Phaeochromocytoma — Catecholamine-Secreting Tumour

Tumour of adrenal medulla chromaffin cells (or extra-adrenal paraganglioma). Secretes adrenaline ± noradrenaline episodically or continuously. 10% rule: 10% bilateral, 10% malignant, 10% extra-adrenal, 10% familial (MEN2, NF1, VHL).

Classic Tetrad — "HHHA"
Headache (severe, episodic) Hypertension (paroxysmal or sustained) Hyperhidrosis (sweating) pAlpitations / anxiety

Hypertensive crisis may be triggered by: surgery, certain drugs (beta-blockers, metoclopramide, tricyclics), direct tumour pressure.

Investigations
  • 24h urinary metanephrines (catecholamine metabolites) — gold standard
  • Plasma metanephrines (highly sensitive)
  • CT/MRI abdomen for localisation; MIBG scintigraphy for metastatic/extra-adrenal
Pre-operative Management (Critical)
  • Alpha-blockade FIRST: phenoxybenzamine (irreversible) or doxazosin for 10–14 days
  • Beta-blockade AFTER alpha: only after adequate alpha-blockade (beta-alone causes paradoxical hypertension)
  • High-salt diet and fluid loading pre-op to expand contracted intravascular volume
  • Surgery: laparoscopic adrenalectomy
Pituitary Apoplexy — EMERGENCY
Haemorrhage or infarction into a pre-existing pituitary adenoma. Sudden onset — requires immediate recognition and treatment.
Presentation
  • Sudden severe "thunderclap" headache (retro-orbital / generalised)
  • Bitemporal hemianopia — compression of optic chiasm
  • Ophthalmoplegia — CN III, IV, VI involvement (cavernous sinus)
  • Reduced GCS / coma
  • Meningism (blood in CSF space)
  • Features of hypopituitarism (adrenal crisis most dangerous)
Immediate Management
  1. Hydrocortisone 100 mg IV IMMEDIATELY (adrenal crisis is life-threatening)
  2. Urgent MRI brain/pituitary (CT may miss)
  3. Neurosurgical / endocrinology review
  4. Airway, breathing, circulation — stabilise
  5. Trans-sphenoidal decompression: indicated for visual deterioration, impaired consciousness, or failed medical management
  6. Monitor electrolytes (DI or SIADH may develop)
Hypopituitarism — Pan-Hypopituitarism

Deficiency of multiple anterior pituitary hormones. Causes: pituitary tumour/surgery/radiotherapy/trauma/apoplexy/Sheehan's syndrome.

Deficient HormoneClinical EffectReplacement
ACTH (→ cortisol)Fatigue, hypotension, hypoglycaemiaHydrocortisone 15–25 mg/day
TSH (→ thyroxine)Hypothyroidism (secondary)Levothyroxine (monitor T4, not TSH)
LH/FSH (→ sex steroids)Hypogonadism, infertility, osteoporosisTestosterone (M) / Oestrogen (F)
GHFatigue, dyslipidaemia, reduced QoL in adultsGrowth hormone (somatropin) SC
ADH (posterior)Diabetes insipidus (polyuria)DDAVP (desmopressin)
ProlactinLactation failure (rarely replaced)Not replaced
SIADH — Syndrome of Inappropriate ADH
Diagnostic Criteria
  • Serum sodium <135 mmol/L (hyponatraemia)
  • Serum osmolality <275 mOsm/kg (hypotonic)
  • Urine osmolality >100 mOsm/kg (inappropriately concentrated)
  • Urine sodium >20 mmol/L (renal Na wasting)
  • Clinically euvolaemic (no oedema, no hypovolaemia)
  • Normal thyroid, adrenal, and renal function
Common Causes
CNS: meningitis/stroke/SAH/head injury Pulmonary: pneumonia/TB/abscess SSRIsCarbamazepine CyclophosphamideMDMA Malignancy (ectopic ADH)
Management
  • Mild-moderate (Na 125–134): fluid restriction 500–750 mL/day + treat underlying cause
  • Severe (Na <125 + symptoms — seizure/coma): 100 mL of 3% NaCl IV over 20 min; may repeat ×2
  • Correction rate: max 1–2 mmol/L/hour acutely, max 10–12 mmol/L per 24h
Central Pontine Myelinolysis (Osmotic Demyelination): over-rapid sodium correction, especially in chronic hyponatraemia. Causes: quadriplegia, locked-in syndrome, death. Maximum correction = 10–12 mmol/L per 24h.
Thyroid Storm (Thyrotoxic Crisis)
Life-threatening extreme hyperthyroidism. Mortality 10–30%. Precipitants: surgery, infection, trauma, iodine load, RAI in unprepared patient.
Burch-Wartofsky Score >45 = Thyroid Storm (treat empirically)
ParameterScore
Temperature >38.5°C5–30 (higher = hotter)
HR >150 bpmup to 25
Atrial fibrillation10
CNS effects (agitation/seizure/coma)10–30
GI/hepatic effects (vomiting/jaundice)10–20
Precipitating event10
Treatment — Sequential Order Matters
  1. Propylthiouracil (PTU) 600 mg loading, then 200–300 mg q4–6h — blocks synthesis AND T4→T3 conversion
  2. Propranolol IV/oral — controls HR; also blocks peripheral T4→T3 conversion
  3. Lugol's iodine 8 drops q6–8h — give ≥1h AFTER PTU (Wolff-Chaikoff: iodine blocks thyroid hormone release; if given before PTU, used as substrate)
  4. Hydrocortisone 100 mg IV q8h — reduces T4→T3, treats co-existing adrenal insufficiency
  5. Active cooling (paracetamol preferred; avoid aspirin — displaces T4 from binding proteins)
  6. Supportive: IV fluids, thiamine, electrolytes, treat precipitant
Myxoedema Coma — Severe Hypothyroidism
Medical emergency. Mortality 20–50%. Most common in elderly women, winter months, after physiological stress (infection, sedative drugs).
Clinical Features
Hypothermia (core temp <35°C) Bradycardia Reduced GCS / coma Hypoventilation / CO2 retention Hypotension Hyponatraemia (SIADH-like) Delayed tendon reflexes Periorbital oedema / macroglossia
Management
  • IV Levothyroxine (T4) 200–400 mcg loading, then 50–100 mcg/day IV
  • Some centres add T3 (liothyronine) 5–20 mcg IV — faster onset
  • Hydrocortisone 50–100 mg IV q6–8h — co-existing adrenal insufficiency very common; give before or with thyroid hormone
  • Passive external warming (avoid active — vasodilation and hypotension)
  • Ventilatory support (often required for hypoventilation)
  • IV glucose, fluids, electrolyte correction
  • ICU admission; monitor ECG (QT prolongation)
Hypercalcaemia — Causes & Management
Common Causes
CategoryKey Causes
PTH-mediatedPrimary hyperparathyroidism (adenoma 80%); Familial hypocalciuric hypercalcaemia
MalignancyPTHrP (solid tumours: lung, breast, renal); Osteolytic mets; Haematological (myeloma)
Vitamin D excessGranulomatous disease (sarcoidosis, TB); Excess supplementation
DrugsThiazides, lithium, excess calcium/VitD
ImmobilisationEspecially in Paget's disease, malignancy
Mnemonic: "Bones, Stones, Groans, Thrones, Moans"
Bones: pain, fractures Stones: renal calculi Groans: nausea, vomiting, constipation Thrones: polyuria, polydipsia Moans: depression, confusion, reduced GCS
Primary Hyperparathyroidism — Surgical Indications
  • Symptomatic disease (any criterion)
  • Serum calcium >2.85 mmol/L (0.25 above upper normal)
  • Age <50 years
  • Creatinine clearance <60 mL/min
  • Nephrolithiasis or nephrocalcinosis
  • Bone density T-score <-2.5
Acute Management (Severe Ca >3.5 mmol/L or Symptomatic)
  1. IV 0.9% NaCl 3–4 L/24h (volume expansion — first and most important step)
  2. IV Bisphosphonate: Zoledronic acid 4 mg IV over 15 min (effect in 2–4 days); Pamidronate 60–90 mg IV
  3. Consider calcitonin 4 IU/kg SC/IM q12h (rapid onset, tachyphylaxis)
  4. Treat underlying cause
  5. Denosumab for malignant hypercalcaemia refractory to bisphosphonates
Hypocalcaemia — Causes & Management
Causes
CauseMechanism
Post-thyroidectomy / neck surgeryParathyroid gland damage or inadvertent removal; most common surgical cause
HypoparathyroidismAutoimmune or post-surgical; low PTH
Vitamin D deficiencyReduced intestinal calcium absorption
Acute pancreatitisSaponification (Ca2+ complexed with fatty acids)
Hungry bone syndromePost-parathyroidectomy or thyroidectomy; massive uptake by bones
CKD / renal failureReduced Vit D activation + hyperphosphataemia
Critical illness / massive transfusionCitrate (blood product preservative) chelates Ca2+
HypomagnesaemiaImpairs PTH secretion and action
Clinical Features — Neuromuscular Excitability
Perioral/fingertip paraesthesia Muscle cramps / tetany Chvostek's sign (facial nerve tap → twitch) Trousseau's sign (BP cuff → carpal spasm) Laryngospasm (emergency) Seizures QT prolongation (arrhythmia risk)
Treatment
  • Symptomatic / severe (Ca <1.9 mmol/L): IV Calcium Gluconate 10 mL of 10% (2.25 mmol Ca2+) slow IV over 10 min; repeat or infusion (50 mL of 10% CaGluc in 500 mL over 24h)
  • Mild / asymptomatic: Oral calcium carbonate 500–1000 mg 2–3×/day
  • Calcitriol (activated Vit D): for hypoparathyroidism (bypasses PTH-dependent activation)
  • Correct hypomagnesaemia if present (magnesium required for PTH secretion)
  • ECG monitoring during IV calcium
  • Post-thyroidectomy nursing: monitor for stridor, perioral tingling, Trousseau's/Chvostek's in 24–48h post-op
Phosphate Disorders — Overview
Hyperphosphataemia
  • Commonest cause: CKD (reduced renal excretion + secondary hyperparathyroidism)
  • Also: hypoparathyroidism, tumour lysis syndrome, rhabdomyolysis
  • Consequences: calcium-phosphate deposition (vascular calcification), hypocalcaemia, renal osteodystrophy
  • Management: dietary phosphate restriction, phosphate binders (calcium carbonate, sevelamer, lanthanum carbonate — take with meals), active Vit D analogues
Hypophosphataemia
CauseContext
Refeeding syndromeRecommencing nutrition after prolonged starvation — Pi shifts intracellularly with glucose; cardiac arrest, respiratory failure
AlcoholismPoor intake + increased urinary excretion
DKA treatmentInsulin drives Pi intracellularly
MalabsorptionIBD, coeliac, bariatric surgery
Primary hyperparathyroidismPTH causes phosphaturia

Refeeding protocol: introduce calories slowly (10 kcal/kg/day), monitor PO4/K/Mg/glucose 4–6 hourly, replace electrolytes proactively (Pabrinex for thiamine).

Diabetes Insipidus (DI)
Types & Causes
TypeMechanismCauses
Central DIDeficient ADH production/secretionHead injury, neurosurgery, pituitary apoplexy, tumour (craniopharyngioma), sarcoidosis, idiopathic
Nephrogenic DIRenal ADH resistanceLithium (commonest drug cause), hypercalcaemia, hypokalaemia, CKD, genetic (V2 receptor mutation)
DipsogenicExcess water intake (primary polydipsia)Psychiatric disorders, hypothalamic lesions
Clinical Features
Polyuria >3 L/day (may reach 10–20 L) Dilute urine (SG <1.005, osmolality <300) Polydipsia Hypernatraemia (if inadequate fluid access) Nocturia / sleep disturbance
Water Deprivation Test (Supervised in Hospital)
  • Withhold fluids; monitor urine osmolality hourly; stop if weight drops >3% or serum Na >145
  • At plateau: give DDAVP 2 mcg SC/IV
  • Central DI: urine osmolality rises >50% post-DDAVP
  • Nephrogenic DI: minimal rise post-DDAVP
  • Primary polydipsia: urine concentrates during deprivation (partial response)
Treatment
  • Central: DDAVP (desmopressin) intranasal / oral / SC — titrate to urine output; risk of hyponatraemia with over-replacement; withhold if hyponatraemic
  • Nephrogenic: treat underlying cause; thiazide diuretics (paradoxically reduce polyuria via Na depletion); low-salt, low-protein diet; NSAIDs (indomethacin) in resistant cases
Hypernatraemia — Na >145 mmol/L
Causes
MechanismExample
Water deficit (most common)DI, excessive sweating (GCC: extreme heat), fever, burns, poor fluid intake (elderly, disabled)
Salt excessIatrogenic (NaCl infusions), mineralocorticoid excess, Conn's syndrome
Hypotonic fluid lossVomiting, diarrhoea, osmotic diuresis (DKA, hyperglycaemia)
GCC context: Extreme heat (summer temperatures 45–50°C) causes significant insensible losses, especially in outdoor workers (construction, agriculture). Hypernatraemia from dehydration is common and preventable.
Correction Principles
  • Maximum correction: 10–12 mmol/L per 24h (too fast → cerebral oedema)
  • Chronic hypernatraemia (>48h): correct even more slowly (over 48–72h)
  • Fluid choice: oral water / nasogastric water (preferred if accessible); 5% dextrose IV; 0.45% NaCl IV
Free Water Deficit Formula
Free Water Deficit (L) = 0.6 × Lean Body Weight (kg) × [(Na/140) - 1]

Use 0.5 for females. Replace calculated deficit over 24–48h in addition to ongoing losses + maintenance.

Primary Aldosteronism (Conn's Syndrome)
Classic Triad
Hypertension (often resistant) Hypokalaemia Suppressed plasma renin

Note: hypokalaemia absent in ~40% of cases. Screen all patients with resistant HTN or HTN + unprovoked hypokalaemia.

Causes
  • Aldosterone-producing adenoma (APA / Conn's adenoma): ~35%
  • Bilateral adrenal hyperplasia (idiopathic): ~60%
  • Familial hyperaldosteronism: rare
Investigation Pathway
  1. Screening: Aldosterone-to-Renin Ratio (ARR) >30 (with aldosterone >15 ng/dL) = positive screen
  2. Confirmatory: fludrocortisone suppression test / salt loading test
  3. Localisation: CT adrenals (but has limitations); Adrenal Vein Sampling (AVS) = gold standard for lateralisation
Treatment
  • Unilateral adenoma: laparoscopic adrenalectomy (curative in ~50%)
  • Bilateral hyperplasia: spironolactone (aldosterone antagonist, first-line) or eplerenone (fewer anti-androgen side-effects)
Acromegaly — Growth Hormone Excess
Pathophysiology

Excess GH from pituitary GH-secreting adenoma (somatotroph adenoma). GH stimulates IGF-1 (insulin-like growth factor 1) from liver, driving somatic effects. In adults, growth plates fused → acral and soft tissue overgrowth.

Clinical Features
Acral enlargement (hands, feet, jaw) Prognathism / malocclusion Soft tissue swelling Carpal tunnel syndrome Colon polyps (colonoscopy screening) Hypertension T2DM / insulin resistance Sleep apnoea Visual field defects
Investigations
  • IGF-1: elevated (screening and monitoring)
  • Oral Glucose Tolerance Test (OGTT) with GH: failure to suppress GH to <1 ng/mL at 120 min = diagnostic
  • MRI pituitary for adenoma localisation
Management
  • First-line: trans-sphenoidal surgery
  • Medical: somatostatin analogues (octreotide/lanreotide), GH receptor antagonist (pegvisomant)
  • Radiotherapy for residual/persistent disease
GCC Metabolic Disease — Global Context
Country / RegionNotable StatisticClinical Implications
Kuwait2nd highest adult obesity prevalence globally (WHO data)Bariatric surgery demand; T2DM complications; metabolic syndrome management priority
UAEDiabetes prevalence ~19% (adults); among world's highestHigh caseload of T2DM complications, DKA, HHS, neuropathy, nephropathy
Saudi ArabiaMetabolic syndrome ~35–40% adult prevalence; rapid urbanisation transitionSCFHS exams emphasise metabolic syndrome criteria, insulin resistance, obesity pharmacotherapy
All GCCVitamin D deficiency near-universal (prevalence 85–95%)National supplementation programs; exacerbates insulin resistance, osteoporosis, immune dysfunction
GCC (Expat Workers)TB-endemic origin countries (South Asia, East Africa)TB as cause of Addison's disease must be considered; adrenal calcification on CT
Qatar, BahrainHigh proportion young workforce in extreme heat occupationsHeat-related hypernatraemia, dehydration, rhabdomyolysis in outdoor workers
DHA / DOH / SCFHS / MOH Exam — High-Yield Points
Metabolic & Endocrine Key Recall Points
  • Metabolic syndrome = 3 of 5 criteria (IDF/AHA/NHLBI)
  • Central obesity thresholds: 94/80 cm (Europid; same for GCC Arab)
  • HOMA-IR formula: insulin × glucose ÷ 22.5
  • Addisonian crisis: hydrocortisone 100 mg IV bolus first, then infusion + saline
  • Pituitary apoplexy: hydrocortisone before MRI
  • Thyroid storm: PTU first, propranolol second, iodine ≥1h after PTU
  • SIADH correction max: 10–12 mmol/L per 24h (myelinolysis risk)
  • Phaeochromocytoma: alpha-block BEFORE beta-block
  • Aspirin contraindicated in thyroid storm (displaces T4 from binding)
  • Myxoedema coma: give hydrocortisone BEFORE or WITH T4 (mask adrenal crisis)
Adrenal Sick Day Rules — Patient Education
For patients on long-term steroids or with adrenal insufficiency:
  • Minor illness / fever: double normal oral dose for duration of illness
  • Vomiting / unable to take oral: administer IM hydrocortisone 100 mg immediately and seek medical attention
  • Surgery / major procedure: inform anaesthetist; peri-operative IV hydrocortisone protocol required
  • Never stop steroids suddenly (adrenal crisis risk)
  • MedicAlert bracelet / steroid card recommended
Common Exam Distractors
  • TSH is unreliable to monitor secondary hypothyroidism (monitor free T4)
  • Conn's: renin is suppressed (not elevated)
  • DI urine: dilute (SG <1.005); SIADH: concentrated
  • Central DI responds to DDAVP; nephrogenic does NOT
Practice MCQs — Metabolic & Endocrinology Nursing

1. A 45-year-old Saudi male has waist circumference 98 cm, BP 138/88 mmHg, fasting glucose 5.8 mmol/L, and HDL-C 1.1 mmol/L. Triglycerides are 1.4 mmol/L. Does he meet criteria for metabolic syndrome?

2. A patient known to have Addison's disease develops vomiting and severe hypotension following gastroenteritis. BP 80/50, confused. What is the FIRST priority intervention?

3. In thyroid storm management, Lugol's iodine must be given:

4. A post-thyroidectomy patient develops perioral tingling and a positive Trousseau's sign. Corrected calcium is 1.8 mmol/L. Immediate management is:

5. A patient with SIADH has serum Na 118 mmol/L with confusion and a generalised seizure. Urine osmolality is 650 mOsm/kg. The patient is euvolaemic. Appropriate management includes:

6. Which investigation is gold standard for lateralisation in primary aldosteronism before surgery?

7. In phaeochromocytoma pre-operative preparation, why must alpha-blockade be established BEFORE beta-blockade?

8. A patient presents with sudden severe headache, right eye ptosis, and bitemporal visual field defect. GCS 13/15. What is the IMMEDIATE nursing/medical priority?

9. A 32-year-old patient develops polyuria (8 L/day), dilute urine (SG 1.001), serum Na 149 mmol/L, and serum osmolality 308 mOsm/kg following trans-sphenoidal pituitary surgery. After DDAVP administration, urine osmolality rises to 680 mOsm/kg. The diagnosis is:

10. When treating myxoedema coma, hydrocortisone should be given:

Interactive Tool — Adrenal Insufficiency Crisis Checker

Clinical decision support tool for nursing assessment. Not a substitute for clinical judgement. Always escalate to medical team when adrenal crisis is suspected.