Endocrine nursing becomes manageable once you stop memorising disorders and start asking a single question: is there too much hormone or too little? Nearly every sign, lab value, and intervention follows from that. These endocrine nursing study notes apply that framework to diabetes, thyroid, and adrenal conditions as they appear on the NCLEX-RN.
How to use this study guide
For each condition below, decide first whether it is a hyper- or hypo- state. Then predict the metabolic rate, the fluid status, and the electrolyte pattern before you read them. Testing your prediction is far more effective than rereading.
Diabetes: the two acute emergencies
DKA and HHS are both hyperglycaemic emergencies, but they differ in onset, in the presence of ketones, and in the degree of dehydration. Treatment in both begins with fluids, not insulin.
- DKA — usually type 1; rapid onset; ketones present; Kussmaul respirations; fruity breath; metabolic acidosis
- HHS — usually type 2; slower onset; minimal ketones; profound dehydration; very high glucose
- Priority in both — fluid replacement first, then potassium checked, then insulin. If potassium is below roughly 3.3 mEq/L, replace potassium before starting insulin: giving insulin first can drive it lower and precipitate a fatal dysrhythmia.
- Watch potassium — insulin drives potassium into cells, so a normal-looking level on arrival can fall fast once the infusion runs; monitor closely and replace throughout treatment
Hypoglycaemia
Hypoglycaemia kills faster than hyperglycaemia, which is why it is treated first whenever the picture is ambiguous. The classic rule is 15 grams of fast-acting carbohydrate, recheck in 15 minutes.
- Signs: shakiness, diaphoresis, tachycardia, confusion, irritability
- Conscious and able to swallow — give 15 g of fast-acting carbohydrate orally
- Unconscious — glucagon intramuscularly, or IV dextrose where access exists
- Follow with a longer-acting carbohydrate and protein once stable
- Beta blockers can mask the adrenergic warning signs
Thyroid disorders
- Hyperthyroidism — weight loss, heat intolerance, tachycardia, anxiety; provide a cool, calm environment
- Thyroid storm — high fever, severe tachycardia, agitation; a medical emergency
- Hypothyroidism — weight gain, cold intolerance, bradycardia, fatigue, constipation
- Levothyroxine — take in the morning on an empty stomach; effects take weeks; it is lifelong
- Post-thyroidectomy — keep tracheostomy equipment and calcium gluconate available; monitor for hypocalcaemia and airway swelling
Adrenal disorders
- Addison’s disease — insufficient cortisol; hypotension, hyperkalaemia, hyponatraemia, hyperpigmentation, weight loss
- Addisonian crisis — profound hypotension and shock; requires immediate fluids and corticosteroids
- Cushing’s syndrome — excess cortisol; hypertension, hyperglycaemia, hypokalaemia, moon face, thin skin, infection risk
- Corticosteroids — never stop abruptly; taper to allow adrenal recovery
NCLEX tips: endocrine nursing
- When both hypo- and hyperglycaemia are plausible, treat hypoglycaemia first.
- In DKA, fluids precede insulin — and potassium is checked before insulin is started.
- Addison’s is low everything except potassium; Cushing’s is high everything except potassium.
- Levothyroxine questions are usually about timing and lifelong adherence, not dosage.
- After thyroid surgery, tingling around the mouth suggests hypocalcaemia and needs prompt reporting.
Pituitary and antidiuretic hormone disorders
Two opposite disorders of antidiuretic hormone appear regularly, and separating them comes down to what the urine is doing. Diabetes insipidus produces enormous volumes of dilute urine; SIADH retains water and dilutes the blood.
- Diabetes insipidus — too little ADH; polyuria with very dilute urine, intense thirst, risk of hypernatraemia and dehydration
- Nursing care in DI — strict intake and output, daily weights, replace fluids, monitor sodium
- SIADH — too much ADH; water retention, concentrated urine, dilutional hyponatraemia
- Nursing care in SIADH — fluid restriction, daily weights, seizure precautions as sodium falls
- Both — daily weight is the most reliable measure of fluid status
Weight is the quiet answer to many endocrine questions. A change of one kilogram represents roughly one litre of fluid, which is more reliable than any single intake and output record.
Turn this guide into active review
Reading through notes once is recognition, not recall. Convert each section above into questions you answer from memory, then check yourself. The Endocrine Nursing Study Notes Bundle packages this material as condensed, exam-ready PDF notes organised by condition, if you would rather review from a prepared set than build one.
Frequently asked questions: endocrine nursing
What is the difference between DKA and HHS?
DKA is typically type 1, develops rapidly, and produces ketones and metabolic acidosis. HHS is typically type 2, develops over days, produces little or no ketosis, and causes more severe dehydration with higher glucose levels.
Why is potassium so important in DKA treatment?
Insulin moves potassium from the bloodstream into cells. A patient whose potassium looks normal on arrival can become dangerously hypokalaemic once insulin is running, so potassium is monitored closely and replaced during treatment.
How do I remember Addison’s versus Cushing’s?
Addison’s is adrenal insufficiency — everything falls except potassium, which rises. Cushing’s is cortisol excess — everything rises except potassium, which falls.
Related guides on Lectures Note
- Fundamentals of Nursing Study Notes — ADPIE, safety, and core clinical skills
- 6-Week NCLEX Study Plan — weekly review goals and exam-day strategy