Kidney Transplant Recipient with Fever and Elevated Creatinine: Differentiating Rejection and Infection
Ms. T, a 38-year-old woman who received a living-donor kidney transplant 8 months ago, presents with a 2-day history of fever (38.3°C), malaise, and decreased urine output. Her baseline serum creatinine was 1.2 mg/dL, but today it is 1.8 mg/dL. Her immunosuppressive regimen includes tacrolimus (trough level 7 ng/mL), mycophenolate mofetil, and prednisone. She reports that she has been non-adherent with her medications for the past week because of a busy work schedule. Vital signs: BP 130/80 mmHg, HR 98 bpm, RR 20 breaths/min. Physical exam reveals a slightly tender transplanted kidney in the right lower quadrant. The nurse must determine the likely cause of her symptoms and prioritize care.
1. What are the possible causes of the patient's fever and elevated creatinine, and what initial assessments should the nurse perform?
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Possible causes: 1) acute rejection, suggested by fever, graft tenderness, and elevated creatinine, especially with medication non-adherence; 2) infection (e.g., urinary tract infection, pneumonia, cytomegalovirus) due to immunosuppression; 3) tacrolimus toxicity (though trough level is within therapeutic range, non-adherence could cause fluctuations); 4) dehydration or obstruction (less likely given graft tenderness). Initial assessments: 1) Obtain a thorough history of medication adherence, sick contacts, and urinary symptoms. 2) Perform a focused physical exam: assess for graft tenderness, bruit, and thrill; check for signs of infection (e.g., lung sounds, costovertebral angle tenderness). 3) Obtain vital signs and monitor for sepsis. 4) Collect urine and blood cultures, and a urine analysis. 5) Draw blood for creatinine, electrolytes, tacrolimus level, and complete blood count with differential. 6) Prepare the patient for a renal ultrasound to rule out obstruction or vascular thrombosis. 7) Notify the transplant team immediately. The nurse should also assess the patient's understanding of immunosuppressive therapy and reinforce adherence.
2. How should the nurse manage the patient's immunosuppression and what education is needed?
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Management: 1) Do not administer additional immunosuppressants without a physician's order; if rejection is suspected, the team may prescribe high-dose corticosteroids or adjust the regimen. 2) Continue current immunosuppressants as prescribed, but clarify any held doses. 3) Monitor tacrolimus levels closely and adjust as needed. 4) Administer antipyretics for fever and ensure adequate hydration. 5) If infection is confirmed, antibiotics should be started promptly and immunosuppression may need to be reduced. Education: 1) Emphasize the importance of strict adherence to immunosuppressive medications; discuss strategies to remember doses (e.g., pillbox, alarms). 2) Teach the patient to report fever, decreased urine output, graft tenderness, or other symptoms immediately. 3) Reinforce infection prevention measures (hand hygiene, avoiding sick contacts, food safety). 4) Explain the risks of rejection and the need for regular follow-up. 5) Provide emotional support and refer to a transplant coordinator or social worker for adherence support. The nurse should document all findings and collaborate with the interdisciplinary team to optimize outcomes.