NCLEX Review Guide: Pyelonephritis in Pregnancy

Understanding Pyelonephritis in Pregnancy

• Pyelonephritis is a serious upper urinary tract infection affecting the kidneys and renal pelvis, occurring in 1-2% of pregnancies.
• Pregnancy-related anatomical changes increase risk: ureteral dilation, decreased peristalsis, and urinary stasis due to progesterone effects.
• Most commonly caused by E. coli (80-90%), followed by Klebsiella and Enterobacter species.
• Typically develops as ascending infection from untreated asymptomatic bacteriuria or cystitis.

Signs and Symptoms

• Classic triad: fever, flank pain, and costovertebral angle tenderness - present in most cases.
• Systemic symptoms include chills, malaise, nausea, vomiting, and may progress to sepsis.
• Lower urinary tract symptoms: dysuria, frequency, urgency, suprapubic pain may be present.
• Uterine contractions and preterm labor may occur due to prostaglandin release from infection.

Laboratory and Diagnostic Findings

• Urinalysis: >10 WBCs/hpf, bacteria, possible RBCs and protein; nitrites and leukocyte esterase positive.
• Urine culture: >100,000 CFU/mL confirms diagnosis and guides antibiotic therapy.
• CBC shows leukocytosis with left shift; blood cultures if sepsis suspected.
• Renal ultrasound may be performed to rule out obstruction or complications.

Maternal and Fetal Complications

Medical Management

1. Immediate hospitalization for IV antibiotic therapy - most cases require inpatient treatment.
2. First-line antibiotics: Ceftriaxone, ampicillin plus gentamicin, or aztreonam if penicillin allergic.
3. IV therapy continued until patient is afebrile for 24-48 hours, then switch to oral antibiotics.
4. Total antibiotic course: 10-14 days with follow-up urine cultures.
5. Suppressive therapy may be indicated for recurrent infections.

Nursing Interventions

• Monitor vital signs every 4 hours - watch for signs of sepsis (hypotension, tachycardia, altered mental status).
• Assess fetal well-being: continuous fetal monitoring if >24 weeks, monitor for uterine contractions.
• Maintain strict intake and output monitoring; encourage fluid intake 2-3 L/day unless contraindicated.
• Administer antipyretics as ordered; position client for comfort (avoid supine position).
• Provide patient education on completing full antibiotic course and follow-up care.

Prevention Strategies

• Screen and treat asymptomatic bacteriuria early in pregnancy - reduces pyelonephritis risk by 80%.
• Encourage proper perineal hygiene: wipe front to back, urinate after intercourse.
• Promote adequate hydration and frequent voiding to prevent urinary stasis.
• Avoid potential irritants like bubble baths, douches, and tight-fitting clothing.

Quick Check Questions

• ☐ Can you identify the classic triad of pyelonephritis symptoms?
• ☐ Do you know the first-line antibiotic treatments for pregnant women?
• ☐ Can you list the major maternal and fetal complications?
• ☐ Do you understand the difference between cystitis and pyelonephritis?