ADVANCED PATHOPHYSIOLOGY MIDTERM NUR 6501 WALDEN UNIVERSITY / COMPLETE ACTUAL EXAM / 150+ QUESTIONS AND CORRECT DETAILED ANSWERS / 2025/202

Ace the Advanced Pathophysiology Midterm (NUR 6501) at Walden University with this comprehensive exam preparation guide. This resource contains 150+ actual exam questions with correct detailed answers covering every major topic tested in this rigorous nurse practitioner course. What's Inside: Hematologic Disorders: Anemia classification by MCV: microcytic (MCV 80 – iron deficiency, GI blood loss, beta thalassemia), normocytic (MCV 80-100), macrocytic (MCV 100 – pernicious anemia, B12/folate deficiency). Peripheral blood smear findings: microcytic/hypochromic cells → GI blood loss; schistocytes → TTP; sickle cells → sickle cell disease. Von Willebrand disease – excessive bleeding following tooth extraction. Acute lymphoblastic leukemia (ALL) – blasts with TdT+, CD19+, PAS-positive aggregates; lacks peroxidase granules. Anemia of chronic disease – low serum iron, low TIBC, normal/high ferritin (e.g., rheumatoid arthritis patient). Thalassemia – reduced synthesis of hemoglobin (alpha or beta chains); microcytic anemia with normal serum iron. DIC (disseminated intravascular coagulation) – high risk in post-partum women, post-surgical patients. Thrombotic thrombocytopenic purpura (TTP) – schistocytes, headaches, neurologic problems. Aspirin inhibits platelet aggregation (not von Willebrand factor synthesis or factor Xa). Cardiovascular Disorders: Uncontrolled hypertension → left ventricular hypertrophy (LVH) on echocardiogram and ECG (enlarged QRS waves). Aortic stenosis – crescendo-decrescendo murmur at right upper sternal border, radiation to carotids, syncope, LVH. Aortic dissection – sudden severe chest/back pain, unequal radial/pedal pulses, history of hypertension. Wide complex ventricular tachycardia – cause of sudden collapse in healthy individual playing basketball. Idiopathic dilated cardiomyopathy – four-chamber dilation, ejection fraction 30%, no obstructive CAD on CT. Bradycardia from blocked pathway at or below AV node (not SA node). Prosthetic aortic valve – expected long-term complication: aortic stenosis (not regurgitation or embolization). Pulmonary edema from myocardial infarction – increased hydrostatic pressure. Tetralogy of Fallot – severity determined primarily by degree of pulmonary stenosis. Hypertrophic cardiomyopathy – LVH on ECG, normal ECHO? (ECHO appears normal but LVH noted – likely HCM), systolic murmur, decreased distal pulses. Atrial fibrillation – rapid chaotic atrial impulse formation causing ineffective quivering; risk factors include valvular heart disease, mitral valve prolapse, hypertension (NOT Asian descent). Dilated cardiomyopathy – all 4 chambers enlarged and dilated. Acid-Base & Electrolyte Disorders: Respiratory alkalosis – pH 7.45, PaCO2 35; acute SOB, anxiety, normal CXR/ECG (e.g., pulmonary embolism until proven otherwise). Chronic respiratory acidosis – pH 7.34, PCO2 59, HCO3 28 (compensated). SIADH (Syndrome of Inappropriate Antidiuretic Hormone) – hyponatremia (Na+ 121), normal glucose, history of small cell lung cancer. Hypocalcemia – Chvostek sign (facial twitching on tapping facial nerve). Hypercalcemia + hypophosphatemia → primary hyperparathyroidism. Pulmonary Disorders: Asthma diagnosis – FEV1 80% predicted, FEV1 increases ≥15% after short-acting bronchodilator. COPD – chronic productive cough, dyspnea, flattened diaphragm on CXR, smoking history (35 pack-years), coarse breath sounds. Community-acquired pneumonia – fever, crackles, infiltrates/consolidation on CXR, elevated WBC. Abscess formation – round density with air-fluid level after treated pneumonia. Restrictive lung disease – prohibits air flow into alveoli by not allowing chest expansion; decreased expansion of lung. Cystic fibrosis – hyperinflated lungs with bronchiectasis on CXR; sweat chloride test negative: 30 mmol/L (21 = negative). Active TB – weight loss, night sweats, hemoptysis (NOT "fever in the morning"). GOLD guidelines – diagnose and treat COPD. Endocrine Disorders: Hypothyroidism – elevated TSH, decreased free T4; Hashimoto's thyroiditis (most common cause in US); symptoms: fatigue, weight gain, constipation, puffy face. Type 2 diabetes – fasting glucose 140-160, overweight (BMI 30+), family history, hypertension; early metabolic derangement often includes hyperlipidemia. Type 1 diabetes – polydipsia, polyuria, polyphagia, weight loss, fatigue; multifactorial inheritance (not simple Mendelian). Pheochromocytoma – paroxysmal hypertension (BP 210/105), palpitations, panic, headache, nausea, diaphoresis; catecholamine-secreting tumor. Myxedema coma – not this case; pheochromocytoma fits episodic symptoms. Primary hyperparathyroidism – hypercalcemia + hypophosphatemia. DI (Diabetes Insipidus) – excessive urination/thirst from inadequate ADH. Cushing's syndrome – ACTH hypersecretion by pituitary gland. Somogyi effect – nocturnal hypoglycemia followed by surge of counter-regulatory hormones (rebound hyperglycemia). Dawn phenomenon – morning hyperglycemia without preceding hypoglycemia. Neurologic Disorders: Multiple sclerosis (MS) – relapses and remissions; increased IgG, oligoclonal bands in CSF; periventricular demyelination on MRI. Myasthenia gravis – progressive weakness worse at end of day (fatigable weakness), diplopia, ptosis; AChR antibodies and MuSK receptor antibodies. Cluster headache – severe periorbital pain, occurs daily for weeks, wakes patient at night, more common in middle-aged white males. Temporal arteritis – transient visual loss, headache, scalp tenderness, jaw claudication, elevated ESR; can cause blindness if untreated. OCD (Obsessive-Compulsive Disorder) – rituals (reorganizing bookshelf, brushing teeth 3x), distress with change in plans. Schizophrenia – core symptoms: hallucinations and disorganized speech (DSM-5: two or more core symptoms). Parkinson's disease – dopamine deficiency; tremor that occurs at rest and improves with activity (NOT "tremor with activity that improves with rest"). ALS (Amyotrophic lateral sclerosis) – no cure; patients under 25 less likely to develop bulbar symptoms rapidly. Carpal tunnel syndrome – numbness/tingling in hand/arm from pinched nerve. Hemorrhagic CVA – acute onset focal neurological deficits. TIA (Transient Ischemic Attack) – focal deficits that resolve within 24 hours. Renal & Genitourinary Disorders: Cholelithiasis (gallstones) – excessive bile saturated with cholesterol; most sensitive diagnostic test: abdominal ultrasound. Nephrolithiasis (kidney stones) – most common type: calcium oxalate; acute flank pain radiating to groin, costovertebral tenderness. Polycystic kidney disease – autosomal dominant (adult type, diagnosed age 30-40); best diagnostic test: ultrasound. Acute prostatitis – most common organism: E. coli. Renal blood flow – diminishes up to 10% per decade after age 30-40 (TRUE). Rheumatologic & Autoimmune Disorders: Rheumatoid arthritis (RA) – early signs: joint pain, tenderness, swelling, loss of ROM, limping; immune system abnormality. Ankylosing spondylitis – inflammatory arthritis affecting spine and large joints; diagnosed by physical exam and X-ray. Systemic lupus erythematosus (SLE) – proteinuria and hematuria on urinalysis (renal involvement); African American female, fatigue, weight loss, joint pain, malar rash worse with sun exposure. Patient teaching for SLE – "Wear sunscreen and large brimmed hats when exposed to the sun" (NOT tanning beds). Dermatologic Disorders: Malignant melanoma – ABCDEE criteria; mole with ragged borders, bleeds frequently (asymmetry, irregular borders, color variation, diameter 6mm, evolving). Melanoma prevention – avoid direct sunlight exposure between 1000 and 1600 (peak UV hours). Seborrheic keratoses – benign, painless, "stuck on" appearance, brown/black/beige. Herpes zoster (shingles) – acute vesicular eruption from varicella-zoster virus reactivation. Cellulitis – red, hot, painful swelling; most common bacteria: Staphylococcus & Streptococcus; outpatient treatment: Penicillins. Infectious Diseases: C. difficile – watery diarrhea and abdominal cramps after antibiotic use for UTI. Pneumocystis pneumonia – most common infection in AIDS (80% occurrence); AIDS diagnosis: CD4+ count 200. Bacterial meningitis in unvaccinated 4-year-old – most likely H. influenzae (CSF: numerous neutrophils, low glucose, increased protein). HIV patient with SOB, chest pain, lymphadenopathy, splenomegaly – mediastinal mass on CXR (likely lymphoma). Genetics & Oncology: BRCA-1 mutation – associated with breast cancer. Benign tumor characteristics – well differentiated (low mitotic index, encapsulated, grows slowly). X-linked recessive disorders – Duchenne muscular dystrophy, hemophilia, color vision deficiency (NOT cystic fibrosis – autosomal recessive). Miscellaneous: Infertility definition – after 6 months of trying to conceive (for woman over 35). Male infertility causes – genetic disorders, hormonal disruption, varicoceles (ALL OF THE ABOVE). MCV ranges: 80 = microcytic; 80-100 = normocytic; 100 = macrocytic. Chvostek sign = hypocalcemia. Gold guidelines for COPD: GOLD. GINA guidelines for asthma. Why This Guide is Different: 150+ Actual Exam Questions – real NUR 6501 midterm content. Verified Correct Answers (ANS....) – all answers detailed and accurate. Walden University Specific – tailored to this specific course. Quick Reference – perfect for last-minute review before exam day