NLE Renal & Urinary Nursing — Acute & Chronic Kidney DiseaseDetailed Explanation

Acute Kidney Injury (AKI): Pathophysiology, Causes, and Classification

Acute Kidney Injury (AKI) — formerly called Acute Renal Failure (ARF) — is a SUDDEN, often REVERSIBLE decline in kidney function characterized by a rapid rise in serum creatinine and BUN, with usually decreased urine output (oliguria). Think of the kidney as a filter: in AKI, the filter suddenly stops working, but unlike CKD, there is potential to recover if the cause is identified and corrected early. Causes are classified by WHERE the problem originates: 1. PRERENAL AKI (Most Common — about 60-70% of cases): The problem is BEFORE the kidney — there is inadequate blood flow (perfusion) reaching the kidneys. The kidney tissue itself is actually INTACT and healthy; if you restore perfusion, the kidneys recover. Think of a washing machine with no water supply — the machine is fine, but without water, it cannot work. Causes include: hemorrhage, severe dehydration (diarrhea/vomiting — common in Philippine tropical settings), burns, sepsis, heart failure, and shock. KEY DIAGNOSTIC CLUE: BUN:Creatinine ratio is HIGH (>20:1) because the kidney reabsorbs urea (BUN) preferentially when perfusion is poor, but creatinine rises less. Urine is concentrated (specific gravity >1.020). 2. INTRARENAL (Intrinsic) AKI: The problem is WITHIN the kidney — actual damage to kidney tissue. The most common cause is Acute Tubular Necrosis (ATN), which occurs from: (a) nephrotoxins such as aminoglycoside antibiotics (gentamicin — frequently used in Philippine hospitals), contrast dye used in CT scans, NSAIDs (like mefenamic acid and ibuprofen — very commonly self-medicated in the Philippines), and (b) prolonged ischemia (prerenal that progresses to tissue damage). Other intrarenal causes: glomerulonephritis, interstitial nephritis. 3. POSTRENAL AKI: The problem is AFTER the kidney — obstruction of urine outflow. Causes: kidney stones (urolithiasis — common in Filipinos with high seafood diet), tumors, BPH (enlarged prostate in older men), urethral strictures. The back-pressure from obstruction damages the nephrons if not relieved.

The Four Phases of AKI: Clinical Progression and Nursing Priorities

AKI does not happen all at once — it progresses through four distinct phases, each with different nursing priorities. Think of AKI like a flood in a city: the flood comes suddenly, causes the most damage at peak flooding, then slowly recedes, and finally the city rebuilds. PHASE 1 — ONSET (Initiating) Phase: From the initial insult until the first signs of kidney dysfunction appear. Duration is variable (hours to days). The damage is beginning but signs may not yet be clinically obvious. The insult (ischemia, toxin, obstruction) is damaging nephrons. NURSING PRIORITY: If the insult can be identified and removed NOW, the severity of AKI can be minimized. This is the most PREVENTABLE phase. PHASE 2 — OLIGURIC Phase: Urine output drops to LESS THAN 400 mL/day (about 17 mL/hour). This is the MOST DANGEROUS phase. Lasts approximately 1-3 weeks. The kidneys are barely functioning. Everything starts to accumulate: BUN and creatinine rise, POTASSIUM rises (HYPERKALEMIA), metabolic acidosis develops (bicarbonate falls), FLUID OVERLOAD occurs (edema, hypertension, pulmonary edema, crackles), phosphate rises and calcium drops, sodium may be low (dilutional). NURSING PRIORITY: HYPERKALEMIA (peaked T waves → arrhythmia → cardiac arrest) and FLUID OVERLOAD (pulmonary edema → respiratory failure) are the two killers. Strict I&O, daily weight, dietary restrictions, and preparation for dialysis. PHASE 3 — DIURETIC Phase: The tubules begin to recover structurally but cannot yet function normally — they cannot concentrate urine well. Urine output RISES dramatically — sometimes 3,000-5,000 mL/day (3-5 liters!). This looks like good news, but it is a new set of dangers. The patient loses too much fluid, potassium, and sodium. Risks: DEHYDRATION, HYPOKALEMIA (watch for muscle weakness, cardiac arrhythmias — but now the T waves will be FLATTENED or U waves appear instead of peaked), HYPONATREMIA. NURSING PRIORITY: REPLACE fluids and electrolytes; monitor for fluid/electrolyte LOSS (opposite of the oliguric phase). Continue monitoring BUN/creatinine — they may still be elevated even as urine output increases. PHASE 4 — RECOVERY (Convalescent) Phase: Gradual improvement in GFR and BUN/creatinine levels over weeks to months. Some patients recover completely; others have a permanent reduction in GFR and may progress to CKD. The patient may still fatigue easily. NURSING PRIORITY: Patient education, medication review, follow-up monitoring of renal function, lifestyle modifications to prevent recurrence.

Hyperkalemia in Renal Failure: Recognition and Emergency Management

HYPERKALEMIA (serum potassium >5.0 mEq/L, life-threatening at >6.5 mEq/L) is the NUMBER ONE LIFE-THREATENING complication in both AKI and CKD. The kidneys normally excrete 90% of the body's potassium; when they fail, potassium accumulates in the blood. High potassium destabilizes cardiac cell membranes, leading to fatal arrhythmias. This is why monitoring the ECG and serum potassium is a TOP PRIORITY nursing action in any patient with renal failure. ECG CHANGES in Hyperkalemia (memorize the progression): - K+ 5.5-6.5: PEAKED (tall, narrow, tent-shaped) T waves — earliest sign - K+ 6.5-7.5: Widened QRS complex, flattened/absent P waves - K+ >7.5: Sinusoidal wave pattern → Ventricular fibrillation → Cardiac arrest EMERGENCY MANAGEMENT — There are THREE strategies, and you must know WHY each is used: 1. PROTECT THE HEART (Fastest, but temporary — does NOT lower K+): - IV CALCIUM GLUCONATE (or calcium chloride): Given first when ECG changes are present. Calcium stabilizes the cardiac cell membrane — it does NOT lower serum potassium, but it PROTECTS the heart from the dangerous effects of high potassium. Effect: within 1-3 minutes. Duration: 30-60 minutes. Think of it as putting a shield on the heart while the other treatments work. 2. SHIFT POTASSIUM INTO CELLS (Temporary reduction of serum K+): - IV INSULIN + DEXTROSE: Insulin drives K+ into cells; dextrose prevents hypoglycemia. Most reliable shift mechanism. - IV SODIUM BICARBONATE: Corrects acidosis; in acidosis, H+ ions move into cells and K+ moves out; by correcting acidosis, K+ moves back into cells. - NEBULIZED BETA-2 AGONISTS (albuterol/salbutamol): Activates the Na-K-ATPase pump, driving K+ into cells. These measures are TEMPORARY (last 1-4 hours) — they buy time for definitive removal. 3. REMOVE POTASSIUM FROM THE BODY (Definitive treatment): - SODIUM POLYSTYRENE SULFONATE (Kayexalate): An oral or rectal cation exchange resin that literally traps K+ in the gut and removes it via stool. Acts in hours; useful but not for emergencies. - DIALYSIS: The fastest and most effective way to remove K+ — used when K+ is critically high, ECG changes are severe, or other measures fail. This is the definitive treatment in ESRD patients. - LOOP DIURETICS (furosemide): Increase renal K+ excretion IF the kidneys still have some function (less useful in anuric AKI). DIETARY RESTRICTION: Limit high-potassium foods. In the Philippine context, these include: kamote (sweet potato), saging (banana), abokado (avocado), kalabasa (squash), dried fruits, coconut water (buko juice), and leafy vegetables. Patients must read food labels and avoid salt substitutes (which contain KCl — potassium chloride).

Chronic Kidney Disease (CKD): Staging, Pathophysiology, and Multisystem Effects

Chronic Kidney Disease (CKD) is a PROGRESSIVE, IRREVERSIBLE loss of kidney function due to gradual destruction of nephrons over months to years. Unlike AKI, there is NO recovery — the goal of management is to SLOW progression and manage complications. The key concept is that as nephrons are destroyed, the remaining nephrons compensate by working harder (hyperfiltration), which paradoxically causes further damage to those remaining nephrons — a vicious cycle. STAGING by GFR (Glomerular Filtration Rate): - Stage 1: GFR ≥90 mL/min (kidney damage present but GFR normal/increased — early) - Stage 2: GFR 60-89 mL/min (mild reduction) - Stage 3a/3b: GFR 30-59 mL/min (moderate reduction — complications begin) - Stage 4: GFR 15-29 mL/min (severe — prepare for renal replacement therapy) - Stage 5: GFR <15 mL/min = END-STAGE RENAL DISEASE (ESRD) — dialysis or transplant needed LEADING CAUSES in the Philippines and globally: (1) DIABETES MELLITUS (diabetic nephropathy) — #1 cause, (2) HYPERTENSION (hypertensive nephrosclerosis) — #2 cause. In the Philippine context where hypertension and diabetes are highly prevalent, CKD is a growing public health concern. UREM IA — the systemic toxic syndrome: When GFR falls severely, retained waste products (urea, creatinine, and other uremic toxins) affect EVERY body system: FLUID/ELECTROLYTE/ACID-BASE: Fluid overload → edema, hypertension, heart failure. HYPERKALEMIA (K+ not excreted). METABOLIC ACIDOSIS (kidneys cannot excrete H+ or regenerate bicarbonate). HYPERPHOSPHATEMIA + HYPOCALCEMIA → bone disease. HEMATOLOGIC: ANEMIA — the kidneys produce ERYTHROPOIETIN (EPO) which signals the bone marrow to make red blood cells. Failed kidneys = no EPO = normocytic, normochromic anemia. Uremic toxins also cause platelet dysfunction → bleeding tendency (bruising, GI bleeding, prolonged bleeding time). BONE: RENAL OSTEODYSTROPHY — a complex process: (1) Kidneys cannot activate Vitamin D → reduced intestinal Ca2+ absorption → hypocalcemia → (2) Hypocalcemia stimulates parathyroid hormone (PTH) release (secondary hyperparathyroidism) → PTH pulls calcium FROM bones → bone demineralization, fractures, bone pain. (3) Hyperphosphatemia further suppresses calcium and worsens the cycle. NEURO: Fatigue, difficulty concentrating, peripheral neuropathy (burning/tingling in feet), restless leg syndrome, confusion, seizures, uremic encephalopathy (in severe uremia). SKIN: Sallow/gray-yellow discoloration (due to urochrome pigment accumulation), severe pruritus (itching — from calcium-phosphate deposits in the skin), UREMIC FROST (white crystalline deposits of urea on the skin — sign of severe, advanced uremia). GI: Anorexia, nausea, vomiting, metallic taste in mouth, UREMIC FETOR (ammonia smell on breath — urea converted to ammonia in the mouth by bacteria). CARDIOVASCULAR: Hypertension, left ventricular hypertrophy, heart failure, UREMIC PERICARDITIS (friction rub on auscultation — a serious complication), and accelerated atherosclerosis. Cardiovascular disease is the LEADING CAUSE OF DEATH in CKD/ESRD patients.

CKD Pharmacological Management: Medications, Rationale, and Nursing Considerations

Managing CKD requires multiple medications targeting specific complications. Philippine nurses must know not just WHAT to give, but WHY, HOW, and what ADVERSE EFFECTS to monitor. This is a HIGH-YIELD area for the NLE. ERYTHROPOIETIN-STIMULATING AGENTS (ESAs): - Drug: Epoetin alfa (Eprex) — the most commonly used in Philippine dialysis centers - Why: CKD kidneys do not produce erythropoietin → normocytic, normochromic anemia → EPO replacement stimulates bone marrow to produce RBCs - Given with IRON supplementation (iron is needed to make RBCs — useless to stimulate production without substrate) - Administer: SubQ or IV; monitor Hgb (target 10-12 g/dL — do NOT aim for normal Hgb as higher levels increase clotting risk) - Adverse effects: HYPERTENSION (most common — EPO causes vasoconstriction), thrombosis, pure red cell aplasia - Nursing: Monitor BP and Hgb regularly PHOSPHATE BINDERS: - Drugs: Calcium carbonate (most affordable), calcium acetate (PhosLo), sevelamer (non-calcium-containing) - Why: In CKD, kidneys cannot excrete phosphate → hyperphosphatemia → worsens hypocalcemia and causes calcium-phosphate deposits → vascular calcification - CRITICAL ADMINISTRATION RULE: Give WITH MEALS (not before, not after) — phosphate binders work by BINDING DIETARY PHOSPHATE in the gut and preventing its absorption. If given between meals, there is no phosphate to bind and it is wasted. - Avoid magnesium-containing antacids (Maalox, Mylanta) — they are excreted by the kidneys; in CKD, magnesium accumulates causing hypermagnesemia (toxicity) ACTIVE VITAMIN D (Calcitriol — Rocaltrol): - Why: CKD kidneys cannot convert Vitamin D to its active form (1,25-dihydroxyvitamin D / calcitriol) → hypocalcemia and secondary hyperparathyroidism. Calcitriol corrects this. - Monitor calcium levels — calcitriol can cause hypercalcemia if doses are too high ANTIHYPERTENSIVES: - ACE Inhibitors (captopril, enalapril) and ARBs (losartan, valsartan): FIRST-LINE agents in CKD with hypertension/proteinuria because they reduce intraglomerular pressure and SLOW CKD progression by protecting the remaining nephrons - Important CAVEAT: ACE inhibitors/ARBs INCREASE serum potassium (they block aldosterone) — monitor K+ carefully, especially in later CKD stages - If creatinine rises >30% after starting ACE inhibitor → may indicate bilateral renal artery stenosis — hold drug, notify physician DRUGS TO AVOID IN CKD: - NSAIDS (ibuprofen, mefenamic acid, naproxen): Cause renal vasoconstriction, reduce GFR, promote sodium and water retention, and increase hyperkalemia — ABSOLUTELY CONTRAINDICATED - MAGNESIUM-CONTAINING ANTACIDS (Maalox, Mylanta): Magnesium accumulates → hypermagnesemia → respiratory depression, cardiac arrest - POTASSIUM-SPARING DIURETICS (spironolactone, amiloride): Worsen hyperkalemia in CKD - NEPHROTOXIC ANTIBIOTICS (aminoglycosides): Worsen renal function; require careful dosing adjustment if used

Hemodialysis (HD): Procedure, Access Care, and Nursing Management

Hemodialysis (HD) is the most commonly used form of renal replacement therapy in Philippine dialysis centers. The principle is simple: pump the patient's blood through an external artificial kidney (dialyzer/dialysis membrane), remove wastes and excess fluid and electrolytes through diffusion and osmosis, then return the cleaned blood to the patient. SESSION DETAILS: Typically ~3-4 hours per session, 3 times per week (Monday-Wednesday-Friday or Tuesday-Thursday-Saturday schedule). This is a significant time commitment affecting Filipino patients' work and family life. VASCULAR ACCESS — the lifeline of hemodialysis: Access is how blood gets from the patient to the dialysis machine and back. 1. AV FISTULA (Arteriovenous Fistula) — PREFERRED and BEST access: - A surgical connection between an artery and a vein (usually in the non-dominant forearm — radial artery to cephalic vein in Cimino-Brescia fistula) - This causes the vein to 'arterialize' — it enlarges, thickens, and develops high blood flow - Needs 6-12 weeks to MATURE before it can be used - LOWEST risk of infection and clotting among all access types - The hallmarks of a PATENT (functioning) AV fistula: THRILL (a buzzing sensation felt when you palpate/touch the fistula — like feeling a vibrating phone) and BRUIT (a rushing sound heard when you auscultate with a stethoscope over the fistula — like a gentle whoosh). ABSENCE of thrill or bruit = CLOTTING = EMERGENCY — report immediately. 2. AV GRAFT: A synthetic tube connecting artery and vein — used when veins are not suitable for fistula. Higher clotting/infection risk than fistula; can be used sooner (2-3 weeks). 3. CENTRAL VENOUS CATHETER (CVC): Temporary access — internal jugular or femoral vein. Used in emergencies or while fistula matures. HIGHEST infection risk — not ideal for long-term use. AV FISTULA ARM CARE (HIGH-YIELD NLE TOPIC): The following are NEVER done on the FISTULA arm: - NO blood pressure measurement (pressure can clot the fistula) - NO venipuncture or IV catheter insertion (damages the fistula and risks infection) - NO tight clothing, watches, or jewelry over the access site - Do NOT let the patient sleep on the fistula arm (compression can clot it) - Apply pressure to needle sites after dialysis to prevent bleeding - Teach patient to check the thrill daily at home — report any change immediately HEMODIALYSIS PROCESS: - Weigh patient BEFORE and AFTER dialysis — the difference = fluid removed (ultrafiltration) - Hold certain medications UNTIL AFTER dialysis (water-soluble, dialyzable drugs like many antihypertensives — e.g., captopril — will be removed by dialysis; give after to avoid subtherapeutic levels AND post-dialysis hypotension) - HEPARIN is used to prevent blood clotting in the circuit during HD → increased bleeding risk after dialysis HEMODIALYSIS COMPLICATIONS: 1. HYPOTENSION (most common complication): Occurs when fluid is removed too rapidly. Signs: dizziness, nausea, muscle cramps. Management: slow the ultrafiltration rate, position Trendelenburg (supine with legs up), give normal saline bolus. 2. DISEQUILIBRIUM SYNDROME: Occurs especially in first few dialysis sessions or when BUN is very high. Rapid removal of urea from blood but NOT yet from brain cells creates an osmotic gradient that draws water into brain cells → cerebral edema. Signs: headache, nausea, vomiting, confusion, seizures. Management: slow/stop dialysis, treat symptoms, mannitol may be given. 3. AIR EMBOLISM: Air enters the blood circuit → chest pain, dyspnea, coughing, neurological changes. Management: clamp blood lines, position patient left lateral Trendelenburg (traps air in right ventricle away from pulmonary vasculature), administer O2. 4. MUSCLE CRAMPS: From rapid fluid/electrolyte shifts during dialysis. 5. INFECTION: Access site infection, bacteremia — especially with CVC access.

Peritoneal Dialysis (PD): Procedure, Complications, and Nursing Management

Peritoneal Dialysis (PD) uses the patient's own PERITONEAL MEMBRANE (the lining of the abdominal cavity) as the dialysis filter. A special catheter (Tenckhoff catheter) is surgically placed through the abdominal wall into the peritoneal cavity. Dialysate solution is infused, left to dwell, then drained — over and over in cycles. The peritoneal membrane, rich in blood vessels, acts as a semipermeable membrane: wastes and excess electrolytes diffuse from the blood into the dialysate by DIFFUSION; excess fluid is removed by OSMOSIS (the dialysate contains DEXTROSE as an osmotic agent — higher dextrose concentration = more fluid pulled out). THE PD CYCLE — Fill → Dwell → Drain: 1. FILL: Warm dialysate is instilled into the peritoneal cavity through the catheter (usually 2 liters per cycle) 2. DWELL: Dialysate stays in the abdomen for a specified time (30 minutes to hours depending on PD type) — this is when diffusion and osmosis occur 3. DRAIN: Dialysate (now loaded with waste products) is drained out by gravity into a collection bag TYPES OF PD: - CAPD (Continuous Ambulatory Peritoneal Dialysis): Done manually, 4-5 exchanges per day, 24/7. Patient can move around during dwell time. Most common type in the Philippines for home PD. - CCPD (Continuous Cycling Peritoneal Dialysis): Uses an automated cycler machine at night while the patient sleeps. KEY NURSING POINTS FOR PD: 1. WARM THE DIALYSATE: Always warm the dialysate to BODY TEMPERATURE (37°C) before instilling. Cold dialysate causes: abdominal pain and cramping (vasoconstriction), decreased effectiveness (warm temp optimizes diffusion rates), patient discomfort. Method: warm water bath or dialysate warmer. NEVER use a microwave (uneven heating). 2. STRICT ASEPTIC TECHNIQUE at every connection and disconnection — the peritoneal cavity is normally sterile. ANY break in asepsis can introduce bacteria → PERITONITIS. 3. ASSESS OUTFLOW (DRAINED) DIALYSATE: - NORMAL: Clear, pale yellow (straw-colored) - CLOUDY outflow = PERITONITIS (the most serious complication) — the cloudiness is caused by white blood cells in the dialysate fighting infection. Report IMMEDIATELY along with fever and abdominal pain. - Bloody outflow: Normal in first few exchanges after catheter insertion; abnormal if persistent - Fibrin strands (white strings): Can clog the catheter; often treated by adding heparin to the dialysate 4. POOR OUTFLOW / INADEQUATE DRAINAGE: - If drained volume is less than instilled volume, there is FLUID RETENTION - Causes and solutions: Kinked tubing → check and straighten; Patient position → reposition, have patient turn side-to-side or ambulate; Full rectum (constipation) → can compress the catheter; Catheter migration — physician evaluation needed - IMPORTANT: Monitor fluid balance carefully — if patient consistently retains dialysate, it contributes to fluid overload 5. CALCULATE FLUID BALANCE: - Fluid balance = Volume drained - Volume instilled - Positive balance (more out than in) = fluid was removed from the body (desired) - Negative balance (less out than in) = fluid was retained in the body (problem) PERITONITIS — THE MAJOR COMPLICATION: - SIGNS: Cloudy outflow + fever + SEVERE abdominal pain and tenderness + nausea/vomiting + rebound tenderness - CAUSE: Contamination during bag exchanges, catheter exit site infection, or bowel contamination - TREATMENT: Send cloudy effluent for culture and sensitivity; intraperitoneal antibiotics (added to dialysate); if severe or persistent, catheter may be removed - PREVENTION: Meticulous aseptic technique — this is the MOST IMPORTANT nursing intervention in PD COMPARISON: PD vs. HD: - PD is gentler, more continuous, better for hemodynamically unstable patients - PD can be done at home (CAPD) — important for Philippine patients in rural areas - PD has fewer dietary/fluid restrictions than HD - PD major risk: PERITONITIS; HD major risk: ACCESS complications and rapid shifts

Kidney Transplantation: Post-operative Care, Rejection, and Immunosuppression

Kidney transplantation is the DEFINITIVE and BEST treatment for ESRD — it offers the best quality of life and survival compared to any form of dialysis. The donor kidney (from a living relative or cadaver donor) is placed in the ILIAC FOSSA (the lower pelvis, on either the right or left side) — NOT where the original kidneys are. The original (native) kidneys are usually LEFT IN PLACE unless they are causing problems (e.g., hypertension, infection). The transplanted kidney's artery and vein are anastomosed to the iliac vessels, and the ureter is connected to the bladder. IMMEDIATE POST-OPERATIVE NURSING PRIORITIES: 1. MONITOR URINE OUTPUT HOURLY — the most important post-transplant assessment. A functioning new kidney should produce urine almost IMMEDIATELY after being connected to blood flow. Target urine output: >30-50 mL/hour minimum. Decreasing urine output after initial good output is a RED FLAG for rejection, thrombosis, or obstruction. The urine may initially be pink-tinged (bloody) from the surgery — this is EXPECTED and should clear within 24-48 hours. 2. MONITOR VITAL SIGNS closely: Blood pressure, temperature (fever = possible rejection or infection), respiratory rate, O2 saturation. 3. ASSESS THE GRAFT SITE: The transplanted kidney is palpable in the lower abdomen. Swelling, tenderness, and firmness over the graft site are signs of REJECTION. 4. MAINTAIN FLUID BALANCE: Large amounts of IV fluids may be needed to support the new kidney's initial diuresis (high urine output after transplant). Replace urine output mL-for-mL. REJECTION — the body fighting the new organ: The immune system recognizes the new kidney as 'foreign' and attacks it. Three types: 1. HYPERACUTE REJECTION: Occurs within MINUTES to HOURS of transplant, in the operating room or immediately post-op. Due to pre-formed antibodies against donor antigens (ABO or HLA incompatibility). The kidney turns dark blue/mottled and never functions. Must be removed immediately. PREVENTED by careful crossmatching before surgery. 2. ACUTE REJECTION: Most common type. Occurs within WEEKS to MONTHS of transplant (most often 1-3 months). TREATABLE with high-dose corticosteroids (pulse methylprednisolone) and increased immunosuppression. SIGNS TO KNOW (high-yield NLE): DECREASED URINE OUTPUT (oliguria), FEVER, PAIN/TENDERNESS over the graft site (in the iliac fossa), WEIGHT GAIN, HYPERTENSION, RISING CREATININE/BUN. Report ANY of these immediately. 3. CHRONIC REJECTION: Gradual, progressive decline in graft function over YEARS. Not fully reversible. Eventually leads to graft failure and return to dialysis/retransplant. LIFELONG IMMUNOSUPPRESSION: Transplant patients take immunosuppressive drugs FOR LIFE to prevent rejection. The three main agents: - CALCINEURIN INHIBITORS: Tacrolimus (Prograf) or Cyclosporine (Sandimmune) — the backbone of immunosuppression. Very narrow therapeutic window — blood levels must be monitored regularly. Tacrolimus adverse effects: nephrotoxicity, hypertension, hyperglycemia (can cause post-transplant diabetes), neurotoxicity. Cyclosporine: nephrotoxicity, hypertension, hirsutism, gingival hyperplasia. - MYCOPHENOLATE MOFETIL (CellCept): Antiproliferative agent — reduces lymphocyte proliferation. Adverse effects: GI upset (take with food), leukopenia. - CORTICOSTEROIDS (Prednisone): Anti-inflammatory and immunosuppressive. Long-term use causes: weight gain, hyperglycemia, hypertension, osteoporosis, poor wound healing, Cushing syndrome features. THE GREAT TRADE-OFF: Immunosuppression prevents rejection but LEAVES THE PATIENT VULNERABLE TO INFECTIONS and MALIGNANCY (especially skin cancers and lymphomas). The nurse must teach: meticulous handwashing, avoid crowded places and sick contacts, report fever immediately, wear sunscreen (sun exposure risk + skin cancer), and NEVER SKIP OR STOP IMMUNOSUPPRESSANT DOSES.

Benign Prostatic Hyperplasia (BPH): Assessment, Treatment, and Post-TURP Nursing Care

Benign Prostatic Hyperplasia (BPH) is NON-MALIGNANT (non-cancerous) enlargement of the prostate gland that occurs in aging men due to hormonal changes (increased dihydrotestosterone — DHT). The enlarged prostate compresses the urethra (the tube that carries urine through the prostate to the outside), causing BLADDER OUTLET OBSTRUCTION. This is a POSTRENAL cause of urinary problems and, if severe, can lead to AKI and CKD from back-pressure on the kidneys (hydronephrosis). PHYSIOLOGY REVIEW: The prostate surrounds the urethra just below the bladder neck. When it enlarges (hyperplasia = too many cells), it squeezes the urethral channel, making it hard for urine to flow out. MANIFESTATIONS — LOWER URINARY TRACT SYMPTOMS (LUTS): Obstructive symptoms (due to the blockage itself): - Weak, hesitant, or intermittent urine stream (poor force of stream) - Straining to urinate - Prolonged urination - Incomplete bladder emptying (sensation of residual urine) - Urinary retention (inability to void — emergency) Irritating symptoms (due to bladder overworking against obstruction): - Urinary FREQUENCY (voiding often in small amounts) - URGENCY (sudden, strong urge to void) - NOCTURIA (waking up multiple times at night to urinate — common complaint in Filipino elderly men) - Dysuria DIAGNOSTICS: Digital Rectal Exam (DRE) — smooth, firm, UNIFORMLY ENLARGED prostate (smooth = benign; irregular/hard = suspicious for cancer). PSA (Prostate-Specific Antigen) — elevated in BPH but MORE elevated in prostate cancer. Post-void residual urine (ultrasound or catheter). International Prostate Symptom Score (IPSS) — symptom questionnaire. PHARMACOLOGICAL TREATMENT: 1. ALPHA-1 BLOCKERS (tamsulosin/Harnal, terazosin, doxazosin, alfuzosin): - Relax smooth muscle in the prostate and bladder neck → urine flows more easily - Effect is RAPID (within days) - Do NOT shrink the prostate — just relax the muscle - KEY NURSING TEACHING: ORTHOSTATIC HYPOTENSION — the alpha-1 blockade also affects blood vessel smooth muscle → BP drops when patient stands up → dizziness, fainting. Teach patients to: RISE SLOWLY from sitting/lying, sit at edge of bed for a moment before standing, take the first dose at bedtime (first-dose syncope), avoid alcohol and hot showers. 2. 5-ALPHA-REDUCTASE INHIBITORS (finasteride/Proscar, dutasteride/Avodart): - Block the enzyme that converts testosterone to DHT (the hormone that stimulates prostate growth) - SHRINK the prostate over 3-6 MONTHS — not for immediate symptom relief - CRITICAL SAFETY: TERATOGENIC — can cause birth defects (specifically abnormal development of male fetus external genitalia). Pregnant women or women who might become pregnant must NOT touch crushed tablets. The tablet must be SWALLOWED WHOLE (the coating protects handlers). In the Philippines where family members often assist with medications, this is important to teach. - Also used in: male pattern baldness (finasteride 1 mg = Propecia) SURGICAL TREATMENT — TURP (Transurethral Resection of the Prostate): Used for significant obstruction or when medications fail. A resectoscope is passed through the urethra (no external incision) and prostate tissue is resected (cut away) using electrical current. The chips of prostate tissue are flushed out. POST-TURP NURSING CARE (HIGH-YIELD NLE TOPIC): 1. CONTINUOUS BLADDER IRRIGATION (CBI): After TURP, the bladder is irrigated continuously with normal saline through a THREE-WAY urethral catheter to: prevent blood clots from obstructing the catheter, keep the bladder free of clots. The irrigation solution flows IN through one port and DRAINS OUT through another, continuously. 2. ASSESS DRAINAGE COLOR: - PINK to LIGHT RED with some clots = EXPECTED initially after TURP; should gradually clear over 24-48 hours - BRIGHT RED, KETCHUP-THICK drainage WITH LARGE CLOTS = HEMORRHAGE — increase CBI rate (to dilute blood and flush clots), notify surgeon IMMEDIATELY. This is a medical emergency. - Clear or pale yellow = too-dilute, well-irrigated urine 3. CALCULATE TRUE URINE OUTPUT: - With CBI running, you CANNOT read the drainage bag as actual urine output — irrigation fluid is mixed in - Formula: TRUE URINE OUTPUT = Total drainage volume - Total irrigation fluid instilled - Example: If 1,000 mL irrigation was instilled and 1,400 mL drained → True urine = 400 mL. This formula is frequently tested on the NLE! 4. TUR SYNDROME (Post-TURP hyponatremia): - During TURP, irrigating fluid can be absorbed through open venous sinuses in the prostate → DILUTIONAL HYPONATREMIA - Signs: confusion, nausea, bradycardia, hypertension, visual disturbances, seizures - Management: restrict fluids, hypertonic saline if severe, diuretics - Nursing alert: sudden mental status change after TURP → think TUR syndrome 5. OTHER POST-TURP CARE: - Bladder spasms are common and painful — antispasmodics may be ordered (B&O suppositories, oxybutynin) - Avoid constipation (straining increases bleeding risk) - After catheter removal: patient may have temporary urinary incontinence (muscles were stretched) and dysuria — reassure this is EXPECTED and temporary - Teach KEGEL exercises (pelvic floor exercises) to regain bladder control

This practice problem integrates multiple high-yield NLE concepts: phosphate binder administration timing, hyperkalemia recognition and emergency management with the Protect-Shift-Remove sequence, and medication management on dialysis days. In Philippine dialysis centers, nurses must manage all of these simultaneously. The sequence for hyperkalemia treatment: (1) IV Calcium gluconate — protects heart (ECG changes present = give this FIRST), (2) Insulin + D50W — shifts K+ into cells, (3) Sodium bicarbonate — shifts K+ into cells (if acidosis present), (4) Dialysis — removes K+ definitively.

This question tests recognition of peritonitis (the most dangerous PD complication), fluid balance calculation in PD, troubleshooting poor drainage, and patient education for prevention. Filipino nurses must be able to triage PD patients over the phone and determine when immediate clinic attendance is needed. Peritonitis requires prompt treatment — delayed treatment can lead to sepsis, catheter loss, and transfer to hemodialysis.

This case integrates BPH, postrenal AKI, and the concept of post-obstructive diuresis (analogous to the diuretic phase of AKI). The nurse must recognize that relief of obstruction — while therapeutic — creates a new set of problems (fluid and electrolyte loss). The BUN:Creatinine ratio is an important differentiating tool in AKI classification and is tested on the NLE.

The AEIOU mnemonic for dialysis indications: A = Acidosis (metabolic, refractory), E = Electrolyte imbalance (hyperkalemia), I = Intoxication (drug overdose), O = Overload (fluid), U = Uremia (symptomatic). This patient meets at least 3 criteria. The sequential management of hyperkalemia (Protect → Shift → Remove) is the core skill being tested. The fluid calculation and weight-to-fluid conversion (1 kg = 1 L) are essential clinical math for the NLE.

This comprehensive question tests acute rejection recognition, differentiation of rejection from infection, emergency response, AND patient education on immunosuppression adherence. Tacrolimus side effects (tremors, headache, neurotoxicity, nephrotoxicity, hypertension, hyperglycemia) are important to know. The key teaching point is NEVER stop immunosuppressants without physician guidance — medication non-adherence is the most common cause of preventable acute rejection in transplant patients.