NLE Endocrine & Metabolic Nursing — Adrenal DisordersRevision Notes

Exam Tips

• If a question gives you an ACTH level, use it to locate the problem: HIGH ACTH = problem is above the adrenal (pituitary or ectopic); LOW ACTH = problem is IN the adrenal or due to exogenous steroids.
• The HPA axis negative feedback loop is tested both directly and indirectly — always think about it when reading adrenal questions.
• Remember: cortisol = glucose UP, immune response DOWN. Aldosterone = sodium UP, potassium DOWN.

Key Points

• The ADRENAL CORTEX has three zones: zona glomerulosa (aldosterone), zona fasciculata (cortisol), zona reticularis (androgens). Mnemonic: GFR — just like kidney function.
• CORTISOL (glucocorticoid): raises blood glucose, suppresses immunity and inflammation, supports the stress response, and affects fat/protein metabolism.
• ALDOSTERONE (mineralocorticoid): retains sodium and water, excretes potassium — controls blood volume and pressure. Think 'aldosterone SAVES sodium, SPILLS potassium.'
• CATECHOLAMINES (epinephrine, norepinephrine from the medulla): the fight-or-flight response — raise heart rate, blood pressure, and glucose.
• CORTISOL REGULATION: The HPA axis — Hypothalamus releases CRH → Anterior Pituitary releases ACTH → Adrenal cortex releases cortisol → Cortisol feeds back negatively to suppress CRH and ACTH.
• NEGATIVE FEEDBACK: When blood cortisol is HIGH, ACTH falls. When cortisol is LOW, ACTH RISES. This explains hyperpigmentation in Addison's (very high ACTH triggers melanocytes).
• EXOGENOUS STEROIDS suppress ACTH → adrenal cortex atrophies → NEVER stop steroids abruptly or adrenal crisis results.
• ACTH level is the key to localizing Cushing's source: HIGH ACTH = pituitary or ectopic source; LOW ACTH = adrenal tumor or exogenous steroids.

Definitions

Section Title

Adrenal Physiology: The Foundation You Must Know

Common Mistakes

• Confusing the cortex (cortisol, aldosterone) with the medulla (catecholamines) — Cushing's and Addison's involve the CORTEX; pheochromocytoma involves the MEDULLA.
• Forgetting that the zona mnemonic GFR stands for Glomerulosa-Fasciculata-Reticularis (outer to inner), not kidney filtration rate.
• Thinking high cortisol means high ACTH — the OPPOSITE is true due to negative feedback (unless the source is pituitary/ectopic).

Exam Tips

• MEMORY AID for Cushing's labs: '3 HIGHs, 1 LOW' — HIGH glucose, HIGH BP, HIGH sodium retention, LOW potassium (hypokalemia).
• If a question describes 'moon face + buffalo hump + purple striae + easy bruising + hyperglycemia' — that is Cushing's. No need to overthink.
• For nursing management priority: PROTECT FROM INFECTION AND INJURY is always a safe answer for Cushing's patients.
• Low-sodium, HIGH-potassium, HIGH-protein, HIGH-calcium diet = the dietary prescription for Cushing's patients.
• After adrenalectomy, watch for ADRENAL INSUFFICIENCY (the patient now has no cortisol source) — this is the post-op priority.

Key Points

• DEFINITION: Chronic excess glucocorticoid (cortisol) causing a constellation of metabolic, physical, and psychological changes.
• MOST COMMON CAUSE (NLE favorite): EXOGENOUS — long-term corticosteroid therapy (prednisone, dexamethasone) for conditions like asthma, lupus, or transplant rejection.
• ENDOGENOUS CAUSES: Cushing's DISEASE (pituitary ACTH-secreting adenoma — most common endogenous cause), adrenal tumor, ectopic ACTH secretion (e.g., lung cancer).
• CLASSIC PHYSICAL SIGNS: Moon face (round, puffy face), Buffalo hump (fat pad at back of neck/upper back), Truncal/central obesity with THIN EXTREMITIES (fat redistribution), Purple/violaceous STRIAE on abdomen and thighs.
• METABOLIC EFFECTS: HYPERGLYCEMIA (cortisol raises glucose → steroid-induced diabetes), HYPERTENSION (fluid retention), HYPOKALEMIA (mineralocorticoid effect).
• SKIN AND MUSCULOSKELETAL: Thin, fragile skin, easy bruising, poor wound healing; muscle wasting and weakness; OSTEOPOROSIS (pathologic fractures).
• IMMUNE: Immunosuppression → INCREASED INFECTION RISK, but signs of infection may be MASKED (no fever, no inflammatory response).
• WOMEN: Hirsutism (excess facial/body hair), acne, menstrual irregularities (excess androgens).
• MOOD/PSYCH: Depression, irritability, psychosis ('steroid psychosis').
• DIAGNOSTICS: Elevated serum cortisol with LOSS of diurnal variation (normally peaks at 8 AM, lowest at midnight); elevated 24-hour urinary free cortisol; DEXAMETHASONE SUPPRESSION TEST (in Cushing's, cortisol is NOT suppressed); ACTH level to localize source.
• NURSING PRIORITY DIAGNOSES (NANDA): Risk for Infection, Risk for Injury (falls, fractures), Disturbed Body Image, Excess Fluid Volume, Risk for Unstable Blood Glucose.

Definitions

Section Title

Cushing's Syndrome — TOO MUCH Cortisol

Common Mistakes

• Forgetting that in Cushing's, the LIMBS are THIN despite central obesity — fat redistributes centrally, not peripherally.
• Confusing Cushing's striae (PURPLE/violaceous) with normal stretch marks (which are lighter/silvery).
• Missing the danger of masked infection — a patient with Cushing's can have a serious infection with minimal fever or inflammatory signs due to immunosuppression.
• Thinking weight gain in Cushing's is all over — it is CENTRAL (face, trunk, upper back) with THIN arms and legs.

Exam Tips

• NLE question about post-adrenalectomy priority nursing action: Monitor for hemorrhage/shock AND administer ordered IV hydrocortisone — both are correct priorities, but hemodynamic stability (ABCs) comes first.
• Cushing's dietary prescription is the OPPOSITE of Addison's in terms of sodium — Cushing's = LOW sodium; Addison's = ADEQUATE/HIGH sodium.
• Transsphenoidal hypophysectomy (pituitary surgery) is the treatment for Cushing's DISEASE — expect post-op care questions about diabetes insipidus, CSF leak, and hormone replacement.

Key Points

• TREATMENT GOAL: Reduce cortisol to normal — either by tapering/stopping exogenous steroids, removing a pituitary tumor (transsphenoidal surgery), or performing adrenalectomy for an adrenal tumor.
• NEVER stop corticosteroids abruptly — always TAPER to allow the suppressed adrenal cortex to recover.
• MONITORING PRIORITIES: Blood glucose (hyperglycemia), blood pressure (hypertension), weight and I&O (fluid retention), electrolytes (especially potassium for hypokalemia).
• INFECTION PREVENTION: Strict hand hygiene, avoid exposure to infected persons, monitor for subtle signs of infection (even slight temperature elevation is significant in an immunosuppressed patient).
• INJURY PREVENTION: Fall precautions (osteoporosis = fracture risk), gentle handling of fragile skin, pressure ulcer prevention, no tight clothing.
• DIET: Low sodium (reduces fluid retention and hypertension), high protein (counteracts muscle wasting), high potassium (replaces what is lost), adequate calcium and Vitamin D (prevents osteoporosis).
• BODY IMAGE SUPPORT: Cushingoid appearance (moon face, buffalo hump, striae, obesity) is distressing — provide empathetic communication, reassure that physical changes often improve with treatment.
• POST-ADRENALECTOMY: The adrenal glands are highly vascular — monitor for HEMORRHAGE and SHOCK (vital signs, dressing checks, hematoma). Give IV corticosteroids perioperatively and taper — watch for adrenal insufficiency (hypotension, weakness, hypoglycemia) if dose is too low. After UNILATERAL adrenalectomy, the remaining gland may be suppressed for months — steroid replacement is needed until recovery.
• After BILATERAL adrenalectomy: LIFELONG steroid replacement is mandatory — both glucocorticoid AND mineralocorticoid.

Definitions

Section Title

Cushing's Nursing Management and Adrenalectomy Care

Common Mistakes

• Giving the WRONG diet for Cushing's — students sometimes say 'high sodium' (wrong) or 'low protein' (wrong). Cushing's diet = LOW sodium, HIGH protein, HIGH potassium, HIGH calcium.
• Forgetting that after UNILATERAL adrenalectomy, steroid replacement is STILL needed temporarily because the remaining gland has been suppressed.
• Not recognizing subtle infection in Cushing's — immunosuppression masks classic inflammatory signs. Any slight fever in a Cushing's patient is a red flag.

Exam Tips

• MEMORY AID for Addison's: '3 LOWs, 1 HIGH' — LOW blood pressure, LOW sodium, LOW glucose, HIGH potassium.
• Bronze skin hyperpigmentation = PRIMARY Addison's = HIGH ACTH. No hyperpigmentation = SECONDARY (low ACTH from pituitary).
• The ACTH stimulation test result for primary Addison's: cortisol DOES NOT RISE (the cortex is destroyed). This is the opposite of normal.
• NLE context: A patient with long-term TB treatment who develops weakness, weight loss, hypotension, and bronze skin = suspect Addison's from TB adrenalitis.

Key Points

• DEFINITION: Adrenal cortex hypofunction resulting in deficiency of BOTH cortisol AND aldosterone.
• PRIMARY ADDISON'S: The adrenal cortex itself is destroyed — most commonly by AUTOIMMUNE adrenalitis (the body attacks its own adrenal cortex). Other causes: tuberculosis (historically significant in the Philippines where TB is endemic), fungal infection, metastatic cancer.
• SECONDARY ADRENAL INSUFFICIENCY: Adrenal cortex is intact but ACTH is insufficient — caused by ABRUPT WITHDRAWAL OF LONG-TERM STEROIDS (most common cause in clinical practice) or pituitary/hypothalamic dysfunction.
• KEY DISTINCTION: In primary Addison's, BOTH cortisol AND aldosterone are deficient. In secondary, only CORTISOL is deficient (aldosterone is relatively preserved because it is also regulated by the renin-angiotensin system, not just ACTH).
• CLASSIC MANIFESTATIONS — the MIRROR IMAGE of Cushing's: HYPOTENSION (low aldosterone → Na/water loss → volume depletion), HYPONATREMIA, HYPERKALEMIA, HYPOGLYCEMIA (low cortisol), weight loss, anorexia, nausea/vomiting/diarrhea, fatigue, muscle weakness.
• HALLMARK SIGN: HYPERPIGMENTATION — bronze/tan skin especially in sun-exposed areas, pressure points, buccal mucosa, and skin folds. ONLY in PRIMARY Addison's (not secondary) — caused by very HIGH ACTH stimulating melanocytes.
• SALT CRAVING is a notable symptom — the body craves sodium because aldosterone is absent.
• DIAGNOSTICS: Low serum cortisol (drawn early morning); ACTH STIMULATION TEST (Cosyntropin test) — gold standard for primary Addison's: cortisol FAILS TO RISE after synthetic ACTH because the cortex is destroyed; ACTH level is HIGH in primary (negative feedback loss), LOW in secondary; electrolytes show LOW sodium, HIGH potassium, LOW glucose.
• NURSING PRIORITY DIAGNOSES (NANDA): Deficient Fluid Volume, Risk for Electrolyte Imbalance, Activity Intolerance, Risk for Unstable Blood Glucose, Deficient Knowledge (steroid therapy and crisis prevention).

Definitions

Section Title

Addison's Disease — TOO LITTLE Cortisol (Primary Adrenal Insufficiency)

Common Mistakes

• Confusing PRIMARY vs. SECONDARY: Hyperpigmentation occurs ONLY in PRIMARY Addison's (due to HIGH ACTH). In secondary, ACTH is LOW, so no hyperpigmentation.
• Forgetting that in PRIMARY Addison's, BOTH cortisol AND aldosterone are low — the electrolyte abnormalities (hyponatremia, hyperkalemia) are worse.
• Missing the Philippine context: Tuberculosis is a significant cause of Addison's disease in the Philippines given its high TB burden — the NLE may test this.

Exam Tips

• If an NLE question asks 'What is the MOST IMPORTANT teaching for a patient with Addison's disease?' — the answer is almost always about NEVER stopping steroids abruptly AND increasing the dose during stress.
• Medical alert bracelet is a SAFETY (Maslow Level 2) intervention — it protects the patient when they cannot communicate their condition.
• The dietary instruction for Addison's is ADEQUATE/HIGH sodium — the OPPOSITE of Cushing's (which requires LOW sodium).
• For hospital nurses (Philippine context): Under RA 9173, the nurse is responsible for the safe and timely administration of medications — never delay or hold steroids for an Addison's patient without medical order.

Key Points

• CORNERSTONE OF TREATMENT: LIFELONG hormone replacement therapy — GLUCOCORTICOID (hydrocortisone is preferred, or prednisone) AND MINERALOCORTICOID (fludrocortisone/Florinef).
• HYDROCORTISONE is usually given in divided doses — the larger dose in the MORNING (mimics the natural cortisol peak) and a smaller dose in the afternoon.
• FLUDROCORTISONE replaces aldosterone function — monitor blood pressure, sodium, and potassium to assess adequacy of replacement.
• LIFE-SAVING PATIENT EDUCATION (NLE high-yield):
• 1. NEVER STOP STEROIDS ABRUPTLY — abrupt withdrawal precipitates adrenal crisis.
• 2. INCREASE the dose during STRESS, ILLNESS, SURGERY, or INFECTION ('sick-day rules' — typically double or triple the dose during illness, then return to baseline when well).
• 3. Wear a MEDICAL ALERT BRACELET at all times — in an emergency, medical personnel must know the patient is on steroid-dependent therapy.
• 4. Carry an EMERGENCY INJECTABLE HYDROCORTISONE KIT (e.g., Solu-Cortef IM) for situations where the patient cannot take oral medication.
• 5. Report early warning signs of adrenal crisis: nausea, vomiting, diarrhea, severe weakness, abdominal pain, confusion.
• DIET: Adequate to HIGH sodium intake (especially during hot weather, exercise, and any gastrointestinal illness that causes sodium loss); maintain adequate fluid intake.
• MONITORING: Weigh daily, monitor blood pressure and pulse, assess for signs of under-replacement (weakness, hypotension, hypoglycemia) versus over-replacement (Cushing-like signs).
• IN THE HOSPITAL: Administer steroids on time — even a short delay in a stressed patient can precipitate a crisis. Do not hold steroids without a physician order.
• NURSING PRIORITIES (Maslow): Physiologic safety first (fluid volume, electrolytes, glucose) → Safety (crisis prevention, patient education) → Psychosocial (coping with a lifelong chronic illness).

Definitions

Section Title

Addison's Nursing Management and Patient Education

Common Mistakes

• Telling the patient to take hydrocortisone at bedtime — it should be taken in the MORNING (largest dose) to match natural cortisol rhythm and avoid insomnia.
• Omitting fludrocortisone in the medication teaching — students sometimes only mention hydrocortisone but forget mineralocorticoid replacement.
• Forgetting the Philippine-context practicality: In community/rural settings, an injectable hydrocortisone kit may not always be available — the nurse must ensure the patient and family are taught to recognize crisis and go to the nearest health facility immediately.

Exam Tips

• NLE PRIORITY QUESTION: 'A patient with Addison's disease is admitted in shock with vomiting and hyperkalemia. What is the PRIORITY nursing action?' Answer: Administer IV hydrocortisone as ordered AND initiate IV normal saline with dextrose.
• MEMORY AID for Addisonian crisis labs: THINK '4 LOWS + 1 HIGH' — Low BP, Low Na, Low glucose, Low cortisol + HIGH potassium.
• Peaked T waves on ECG = hyperkalemia = adrenal crisis red flag.
• Never give a BETA-BLOCKER to treat the tachycardia in adrenal crisis — treat the cause (cortisol deficiency), not just the symptom.

Key Points

• DEFINITION: Acute, life-threatening deficiency of cortisol causing cardiovascular collapse. It is a true medical emergency.
• PRECIPITATING FACTORS: Physical STRESS (infection, surgery, trauma), Illness with vomiting/diarrhea (unable to absorb oral medications), ABRUPT STEROID WITHDRAWAL, or any major physiological stress in a patient with known or unknown adrenal insufficiency.
• CLINICAL FEATURES — Severe and Acute: Profound HYPOTENSION progressing to SHOCK (vascular collapse), Severe HYPONATREMIA (very low sodium), HYPERKALEMIA (high potassium — risk of fatal cardiac arrhythmia), HYPOGLYCEMIA (low glucose — altered consciousness, seizure), High FEVER, Severe nausea/vomiting/diarrhea/abdominal pain, Extreme weakness, confusion, and loss of consciousness.
• CONTRAST WITH CUSHING'S CRISIS PICTURE: In Addisonian crisis — LOW BP + HIGH K + LOW glucose + LOW Na (everything is low except potassium). In Cushing's — HIGH BP + LOW K + HIGH glucose + HIGH Na.
• PRIORITY NURSING MANAGEMENT (ABC-based Maslow prioritization):
• STEP 1: IV HYDROCORTISONE (Solu-Cortef) 100 mg BOLUS immediately — this is the PRIORITY FIRST action. It replaces the missing cortisol and reverses the crisis.
• STEP 2: IV FLUIDS — Normal Saline (0.9% NaCl) with DEXTROSE to correct HYPOVOLEMIA, HYPONATREMIA, and HYPOGLYCEMIA simultaneously.
• STEP 3: TREAT HYPERKALEMIA — cardiac monitoring (ECG for peaked T waves), potassium-lowering interventions as ordered.
• STEP 4: Identify and TREAT THE TRIGGER — culture blood/urine if infection suspected, antibiotics as ordered.
• STEP 5: Continuous monitoring — vital signs (especially BP), blood glucose, electrolytes, I&O.
• STEP 6: Minimize STRESS — quiet environment, clustering care, minimize stimulation.
• DO NOT DELAY HYDROCORTISONE — administer immediately upon recognition of crisis, even before all diagnostic results are available if the clinical picture is clear.
• NURSING DIAGNOSES (NANDA/Maslow Priority): Deficient Fluid Volume, Decreased Cardiac Output, Risk for Electrolyte Imbalance (Hyperkalemia), Risk for Unstable Blood Glucose, Risk for Shock.

Definitions

Section Title

Addisonian (Adrenal) Crisis — EMERGENCY

Common Mistakes

• Giving IV FLUIDS before IV HYDROCORTISONE — the correct priority is hydrocortisone FIRST (to reverse the hormonal deficiency), but realistically they are given simultaneously. If forced to choose ONE priority, hydrocortisone or fluids are both acceptable answers — but hydrocortisone is the specific treatment.
• Forgetting the HYPERKALEMIA danger — the cardiac arrhythmia risk from high potassium can be fatal. ECG monitoring is essential.
• Using hypotonic fluids in crisis — always use NORMAL SALINE (isotonic) to replace volume and sodium. Never give plain water or hypotonic saline first.
• Confusing adrenal crisis management with diabetic crisis — in adrenal crisis, you give SALINE WITH DEXTROSE; in DKA, initial fluid is plain normal saline.

Exam Tips

• CLASSIC NLE QUESTION: 'Which drug should be given FIRST before surgery for pheochromocytoma?' Answer: ALPHA-BLOCKER (phenoxybenzamine) — ALWAYS before beta-blockers.
• Remember the triad: HEADACHE + PALPITATIONS + DIAPHORESIS = pheochromocytoma.
• Diagnostic test: 24-hour urine for METANEPHRINES and VMA. Avoid caffeine and certain foods/drugs.
• Paroxysmal hypertension (episodic, not constant) is the clue that distinguishes pheochromocytoma from other causes of hypertension.
• DO NOT PALPATE THE ABDOMEN — this is a safety nursing priority for pheochromocytoma patients.

Key Points

• DEFINITION: Usually BENIGN tumor of the adrenal MEDULLA that secretes excess EPINEPHRINE and NOREPINEPHRINE (catecholamines).
• Can be part of the MEN (Multiple Endocrine Neoplasia) syndrome — NLE may reference this.
• CLASSIC TRIAD (NLE FAVORITE): 1. SEVERE HEADACHE, 2. PALPITATIONS/tachycardia, 3. Profuse DIAPHORESIS (sweating).
• ADDITIONAL MANIFESTATIONS: SEVERE, often PAROXYSMAL (episodic) HYPERTENSION — blood pressure can spike to dangerously high levels then return to near normal between episodes; tremor, anxiety, pallor or flushing, HYPERGLYCEMIA (catecholamines raise glucose), weight loss.
• The hypertension is PAROXYSMAL (episodic) — this distinguishes pheochromocytoma from essential hypertension. Episodes may be triggered by physical activity, emotional stress, palpation of the abdomen, or certain foods/medications.
• DIAGNOSTICS: GOLD STANDARD — 24-hour urine collection for METANEPHRINES and VANILLYLMANDELIC ACID (VMA), which are catecholamine breakdown products. Also plasma metanephrines. CT/MRI to locate the tumor. INSTRUCTION TO PATIENT: avoid CAFFEINE, certain foods (vanilla, bananas, citrus), and medications (tricyclic antidepressants, MAOIs) that can alter VMA results.
• TREATMENT: Surgical removal — ADRENALECTOMY.
• PRE-OPERATIVE NURSING CARE (CRITICAL — NLE HIGH-YIELD):
• ALPHA-BLOCKERS FIRST (phenoxybenzamine/Dibenzyline) — block alpha receptors to control hypertension and prevent hypertensive crisis during surgery. Must be given for 7-14 days before surgery.
• BETA-BLOCKERS (propranolol) — given ONLY AFTER alpha-blockade is established, to control tachycardia.
• NEVER give BETA-BLOCKERS ALONE or FIRST — beta-blockade without alpha-blockade leaves alpha receptors unopposed → massive vasoconstriction → HYPERTENSIVE CRISIS.
• DO NOT PALPATE THE ABDOMEN — manual pressure on the tumor triggers a massive catecholamine release and can cause a life-threatening hypertensive crisis.
• Provide a CALM, QUIET, RESTFUL environment to minimize catecholamine release.
• POST-OPERATIVE: Monitor for HYPOTENSION (catecholamine levels drop sharply after tumor removal — the body is suddenly without excess catecholamines); monitor for adrenal insufficiency if bilateral adrenalectomy was performed.
• NURSING PRIORITY DIAGNOSES: Risk for Decreased Cardiac Output, Risk for Ineffective Tissue Perfusion (hypertensive crisis/hypotension), Anxiety, Deficient Knowledge.

Definitions

Section Title

Pheochromocytoma — Catecholamine-Secreting Adrenal Tumor

Common Mistakes

• MOST DANGEROUS MISTAKE: Giving a beta-blocker WITHOUT first establishing alpha-blockade in pheochromocytoma — this causes a life-threatening hypertensive crisis due to unopposed alpha stimulation.
• Palpating the abdomen of a pheochromocytoma patient — this is explicitly contraindicated and can trigger a catecholamine surge.
• Confusing the post-op complication: after pheochromocytoma surgery, expect HYPOTENSION (not hypertension) — the sudden removal of catecholamine excess causes blood pressure to drop.

Exam Tips

• Resistant hypertension + hypokalemia + NO edema = THINK Conn's syndrome.
• Spironolactone is the drug of choice for Conn's — it blocks aldosterone receptors.
• Renin level: in PRIMARY hyperaldosteronism (Conn's), renin is SUPPRESSED (the high aldosterone from the adenoma suppresses renin via feedback). In SECONDARY hyperaldosteronism (from renal artery stenosis), renin is HIGH.

Key Points

• DEFINITION: Excess aldosterone secretion from an aldosterone-secreting adrenal adenoma (most common) or bilateral adrenal hyperplasia.
• PATHOPHYSIOLOGY: Excess aldosterone → kidneys RETAIN sodium and water (→ hypertension) and EXCRETE potassium (→ hypokalemia).
• MANIFESTATIONS: HYPERTENSION (often severe and resistant to standard antihypertensive treatment — a key clue), HYPOKALEMIA (muscle weakness, cramps, fatigue, arrhythmias, polyuria/polydipsia), Metabolic ALKALOSIS.
• IMPORTANT: Edema is usually ABSENT despite sodium retention — because sodium is retained with water, expanding intravascular volume (causing hypertension) without causing third-spacing/edema.
• DIAGNOSTICS: Elevated aldosterone-to-renin ratio (aldosterone is high, renin is SUPPRESSED because the body detects elevated blood volume); CT scan to identify adenoma.
• MANAGEMENT: SPIRONOLACTONE (potassium-sparing diuretic that BLOCKS aldosterone receptors) — first-line medical management; correct potassium deficit; ADRENALECTOMY for unilateral adenoma (Conn's adenoma); monitor blood pressure and potassium.
• NURSING PRIORITY DIAGNOSES: Risk for Electrolyte Imbalance (Hypokalemia), Risk for Decreased Cardiac Output (arrhythmia from hypokalemia), Excess Fluid Volume (hypertension).

Definitions

Section Title

Primary Hyperaldosteronism (Conn's Syndrome)

Common Mistakes

• Expecting edema in Conn's syndrome — unlike other sodium-retaining conditions, edema is usually ABSENT because the fluid stays in the intravascular space.
• Confusing Conn's hypokalemia with Cushing's hypokalemia — both cause hypokalemia, but Conn's features SUPPRESSED renin (because the problem is in the adrenal, not the renin system).

Exam Tips

• NLE favorite: 'A patient asks why they cannot stop their prednisone suddenly.' Answer: Because the adrenal glands have been suppressed by the exogenous steroid and cannot produce sufficient cortisol; abrupt withdrawal can cause adrenal crisis.
• Take steroids IN THE MORNING WITH FOOD — this is a two-part answer that is commonly tested.
• If an NLE question describes a patient on long-term steroids who develops a 'wound that is not healing' or 'mild fever' — think MASKED INFECTION due to immunosuppression.

Key Points

• Because corticosteroids are used to treat MANY conditions (asthma, lupus, rheumatoid arthritis, organ transplant, inflammatory bowel disease, nephrotic syndrome), steroid teaching is one of the MOST FREQUENTLY TESTED NLE topics.
• CRITICAL TEACHING POINTS FOR PATIENTS ON LONG-TERM STEROIDS:
• 1. NEVER STOP ABRUPTLY — always taper. Abrupt withdrawal causes ADRENAL CRISIS. (Rationale: exogenous steroids suppress ACTH → adrenal cortex atrophies → cannot produce cortisol when needed.)
• 2. TAKE WITH FOOD — steroids irritate the gastric mucosa and can cause peptic ulcer disease. Take with meals or milk.
• 3. TAKE IN THE MORNING — to mimic the natural cortisol peak and minimize insomnia and disruption of the HPA axis.
• 4. INCREASE DOSE DURING STRESS — any physical stress (illness, surgery, trauma, infection) requires stress dosing because the suppressed adrenals cannot respond adequately.
• 5. MONITOR FOR CUSHINGOID EFFECTS during long-term use: hyperglycemia, hypertension, fluid retention, weight gain, hypokalemia, mood changes, osteoporosis, delayed healing, and MASKED INFECTION.
• 6. MASKED INFECTION DANGER: Steroids suppress the immune response, so signs of infection (fever, inflammation, redness, swelling) may be ABSENT or MINIMAL even when a serious infection is present. Report ANY signs of infection, no matter how mild.
• 7. MEDICAL ALERT BRACELET: Patients on long-term steroids should wear identification in case of emergency.
• 8. BONE HEALTH: Take calcium and Vitamin D supplements; weight-bearing exercise; monitor bone density.
• COMMON STEROID MEDICATIONS: Hydrocortisone (Solu-Cortef), Prednisone, Methylprednisolone (Solu-Medrol), Dexamethasone.
• TAPER SCHEDULE PRINCIPLE: The longer the patient has been on steroids and the higher the dose, the slower the taper. The adrenal cortex needs time to recover its natural function.

Definitions

Section Title

Corticosteroid Therapy — The Cross-Cutting NLE Teaching Point

Common Mistakes

• Telling a patient on prednisone to take it at NIGHT — steroids should be taken in the MORNING to mimic natural cortisol rhythm and reduce insomnia.
• Not educating patients about masked infection — this is a SAFETY issue. A patient on steroids may have pneumonia with minimal or no fever.
• Overlooking peptic ulcer risk — steroids thin the gastric mucosa. Always advise taking with food and monitor for GI symptoms.

Exam Tips

• ELECTROLYTES ARE YOUR FASTEST CLUE: Low Na + High K + Low glucose = ADDISON'S or adrenal crisis. High glucose + Low K + High BP = CUSHING'S.
• If the NLE gives you a patient with all-LOW values (low BP, low Na, low glucose) plus high K = think Addison's/adrenal crisis.
• If the NLE gives you a patient with a round face, fat upper back, purple stretch marks, and high blood sugar = think Cushing's.
• Practice reading the comparison table until you can fill it in from memory — it is one of the most tested patterns in adrenal NLE questions.

Key Points

• BLOOD PRESSURE: Cushing's = HIGH (fluid retention, mineralocorticoid effect); Addison's = LOW (sodium/water loss).
• SODIUM: Cushing's = HIGH or normal (retention); Addison's = LOW (hyponatremia — major feature).
• POTASSIUM: Cushing's = LOW (hypokalemia); Addison's = HIGH (hyperkalemia — major feature).
• GLUCOSE: Cushing's = HIGH (hyperglycemia); Addison's = LOW (hypoglycemia).
• WEIGHT: Cushing's = GAIN (central obesity); Addison's = LOSS.
• SKIN: Cushing's = THIN, fragile, purple striae, easy bruising; Addison's = HYPERPIGMENTATION (bronze skin — primary only).
• CORTISOL LEVEL: Cushing's = HIGH; Addison's = LOW.
• ACTH LEVEL (primary causes): Cushing's disease = HIGH; Primary Addison's = HIGH (but with LOW cortisol); Cushing's from adrenal tumor = LOW.
• FLUID STATUS: Cushing's = EXCESS fluid volume; Addison's = DEFICIENT fluid volume.
• DIETARY FOCUS: Cushing's = LOW sodium, HIGH potassium, HIGH protein, HIGH calcium; Addison's = ADEQUATE/HIGH sodium.
• EMERGENCY: Cushing's post-adrenalectomy = adrenal insufficiency; Addison's = Addisonian CRISIS (hypotension + hyperkalemia + hypoglycemia).
• MEMORY AID: 'CUSHING'S IS HIGH EVERYTHING EXCEPT POTASSIUM. ADDISON'S IS LOW EVERYTHING EXCEPT POTASSIUM.'

Section Title

Cushing's vs. Addison's — The Master Comparison Table

Common Mistakes

• Getting confused about ACTH levels — remember: ACTH is HIGH when the adrenal cortex is NOT making enough cortisol (Addison's primary, Cushing's disease) and LOW when the adrenal cortex is making TOO MUCH cortisol autonomously (adrenal tumor causing Cushing's) or from exogenous steroids.
• Mixing up the dietary instructions — Cushing's = LOW sodium; Addison's = HIGH sodium. Students frequently swap these.
• Forgetting that in Addisonian crisis, the POTASSIUM is HIGH (not low like in Cushing's) — hyperkalemia is the cardiac danger.