Acute glomerulonephritis is an inflammatory condition of the renal glomeruli that typically presents with a sudden onset of hematuria, edema, hypertension, and mild to moderate renal insufficiency. The glomeruli, which serve as the primary filtering units of the kidneys, become congested and inflamed due to an immune-mediated injury. This disruption impairs the filtration membrane, allowing red blood cells and protein to leak into the urine while reducing the overall glomerular filtration rate (GFR). In clinical practice across Nigeria, recognising this syndrome early helps prevent permanent nephron damage and long-term chronic kidney disease.
The pathogenesis of acute glomerulonephritis is fundamentally rooted in an immune complex reaction. Antibodies produced in response to an antecedent infection bind with circulating antigens, forming immune complexes. These complexes travel through the bloodstream and become trapped within the glomerular capillary loops. Their deposition triggers the complement cascade, attracting neutrophils and monocytes that release inflammatory mediators. This inflammatory storm damages the capillary endothelium and basement membrane, leading to decreased urine formation and fluid overload.
While post-streptococcal glomerulonephritis remains the classic post-infectious prototype globally, local epidemiological factors shape the presentation in Nigeria.
The clinical picture of acute glomerulonephritis is distinct and easily recognized during physical examination. Patients typically present with sudden facial puffiness, especially around the eyes in the morning.
Confirming acute glomerulonephritis requires a combination of urinalysis, blood tests, and sometimes serological markers. Urinalysis consistently reveals gross or microscopic hematuria, alongside proteinuria and red blood cell casts. Serum chemistry typically shows elevated urea and creatinine, signaling impaired renal clearance. Antistreptolysin O titers are measured to confirm a recent streptococcal infection, though a normal titer does not rule out the disease if skin lesions were the primary cause. Complement component levels, specifically C3, are characteristically depressed during the active phase of immune complex consumption.
Management of acute glomerulonephritis focuses on supportive care, controlling blood pressure, and eradicating any persistent infectious triggers. Loop diuretics are frequently prescribed to manage severe fluid overload and reduce systemic hypertension. Antibiotic therapy, typically penicillin, is administered if a streptococcal infection is still active, to prevent transmission and eliminate the source. Dietary sodium and fluid restrictions are implemented immediately to limit intravascular volume expansion. Corticosteroids or immunosuppressive agents are reserved for rapidly progressive forms with severe cellular proliferation.
| Nursing Intervention | Clinical Purpose | Frequency |
|---|---|---|
| Accurate daily weight | Monitors fluid retention and diuretic efficacy | Every morning |
| Strict fluid intake and output | Evaluates renal function and oliguria severity | Hourly to 24-hourly |
| Blood pressure monitoring | Detects dangerous hypertensive spikes early | Every 4 hours |
| Urine dipstick testing | Assesses changes in hematuria and proteinuria | Every shift |
Nurses play a vital role in executing these monitoring protocols while educating the family on dietary compliance, particularly regarding salt and potassium restriction during the oliguric phase.
Severe complications can arise quickly if fluid overload and hypertension remain unmanaged. Hypertensive encephalopathy is a critical medical emergency characterized by severe headache, confusion, vomiting, and potential seizures due to acute cerebral vessel vasospasm. Acute cardiac decompensation and pulmonary edema can also develop from hypervolemia. Nurses must recognize early signs of respiratory distress and be prepared to assist with emergency antihypertensive infusions, oxygen administration, or emergency dialysis if uremic symptoms become life-threatening.
The prognosis for children and young adults with acute post-streptococcal glomerulonephritis is generally favorable, with the vast majority achieving complete spontaneous recovery. Microscopic hematuria, however, can persist for several months after normal renal function returns. Discharge education must emphasize the importance of completing any prescribed antibiotic courses, maintaining dietary modifications until clearance is given, and keeping follow-up appointments. Parents should be instructed to monitor urine output and watch for recurrence of facial swelling or dark urine.