Endocrine Disorders Diabetes, Thyroid, Adrenal NURS 5051/6051 study notes.

🧬 Endocrine System Overview
The endocrine system regulates metabolism, growth, reproduction, and stress responses through hormone secretion.

Disorders often arise from hypo- or hypersecretion of hormones, receptor dysfunction, or autoimmune destruction.

🍬 Diabetes Mellitus
Types

Type 1: Autoimmune destruction of pancreatic beta cells → absolute insulin deficiency.

Type 2: Insulin resistance + relative insulin deficiency; linked to obesity and lifestyle.

Gestational Diabetes: Glucose intolerance during pregnancy.

Pathophysiology

Hyperglycemia due to impaired glucose uptake and increased hepatic glucose production.

Chronic hyperglycemia damages blood vessels → microvascular (retinopathy, nephropathy, neuropathy) and macrovascular (CAD, stroke) complications.

Clinical Manifestations

Polyuria, polydipsia, polyphagia, weight loss (Type 1), fatigue, blurred vision.

Long-term: poor wound healing, infections, neuropathy.

Management

Lifestyle: diet, exercise, weight control.

Medications: insulin (Type 1), oral agents/insulin (Type 2).

Technology: Continuous glucose monitors (CGM), insulin pumps, telehealth for monitoring.

🦋 Thyroid Disorders
Hypothyroidism

Causes: Hashimoto’s thyroiditis (autoimmune), iodine deficiency, thyroidectomy.

Pathophysiology: Low T3/T4 → slowed metabolism.

Symptoms: Fatigue, cold intolerance, weight gain, constipation, bradycardia, dry skin.

Complication: Myxedema coma (life-threatening).

Hyperthyroidism

Causes: Graves’ disease (autoimmune), toxic multinodular goiter.

Pathophysiology: Excess T3/T4 → increased metabolism.

Symptoms: Weight loss, heat intolerance, tachycardia, tremors, anxiety, exophthalmos (Graves).

Complication: Thyroid storm (acute, severe hyperthyroidism).

Management

Hypothyroidism: Levothyroxine replacement.

Hyperthyroidism: Antithyroid drugs, radioactive iodine, surgery.

Technology: EHR alerts for abnormal thyroid labs, patient portals for medication adherence.

🧾 Adrenal Disorders
Cushing’s Syndrome (Hypercortisolism)

Causes: Prolonged corticosteroid use, adrenal tumors, pituitary adenoma (Cushing’s disease).

Symptoms: Moon face, buffalo hump, truncal obesity, muscle weakness, hypertension, hyperglycemia.

Addison’s Disease (Adrenal Insufficiency)

Causes: Autoimmune destruction, infection, adrenal hemorrhage.

Symptoms: Fatigue, weight loss, hyperpigmentation, hypotension, hyponatremia, hyperkalemia.

Complication: Addisonian crisis (acute adrenal failure → shock).

Pheochromocytoma

Rare adrenal medulla tumor → excess catecholamines.

Symptoms: Episodic hypertension, palpitations, sweating, headaches.

Management

Cushing’s: Surgery, tapering steroids, medications to block cortisol.

Addison’s: Lifelong glucocorticoid/mineralocorticoid replacement.

Pheochromocytoma: Surgical removal, alpha/beta blockers pre-op.

Technology: Wearable BP monitors, telehealth for crisis prevention.

📊 Quick Comparison Table
Disorder Hormone Imbalance Key Symptoms Major Complications
Type 1 Diabetes ↓ Insulin Polyuria, weight loss DKA, microvascular disease
Type 2 Diabetes Insulin resistance Fatigue, infections CAD, stroke, nephropathy
Hypothyroidism ↓ T3/T4 Fatigue, cold intolerance Myxedema coma
Hyperthyroidism ↑ T3/T4 Weight loss, tachycardia Thyroid storm
Cushing’s Syndrome ↑ Cortisol Obesity, hypertension Diabetes, osteoporosis
Addison’s Disease ↓ Cortisol/aldost Fatigue, hypotension Addisonian crisis
Pheochromocytoma ↑ Catecholamines Hypertension, palpitations Stroke, cardiac arrhythmia
✅ Key Takeaway for Nursing Practice:
Endocrine disorders require vigilant monitoring, patient education, and integration of technology (EHRs, wearables, telehealth) to improve outcomes. Nurses play a critical role in recognizing early signs, preventing crises, and supporting long-term management.

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