CCTC - Certified Clinical Transplant Coordinator Immediate Postoperative Care Questions and Answers — Questions and Answers
Question 1: A kidney transplant recipient, 6 hours postoperative, experiences a sudden decrease in urine output from 150 mL/hr to less than 20 mL/hr. The patient's blood pressure and central venous pressure are stable. What is the MOST appropriate initial action for the transplant coordinator to anticipate?
- Administration of an intravenous fluid bolus.
- Obtaining an urgent renal ultrasound with Doppler. (Correct answer)
- Sending a urine sample for culture and sensitivity.
- Preparing for emergent hemodialysis.
Correct answer: Obtaining an urgent renal ultrasound with Doppler.
A sudden drop in urine output in a patient with stable hemodynamics is highly suspicious for a vascular or urological emergency. An urgent renal ultrasound with Doppler is the most critical first step to rule out renal artery or vein thrombosis, or a ureteral obstruction, which would require immediate surgical intervention. While fluid status is important, stable CVP makes severe hypovolemia less likely. Infection is unlikely to cause such an abrupt change this early, and dialysis would only be considered after a cause for the oliguria is determined.
Question 2: A heart transplant recipient is receiving basiliximab as part of their induction immunosuppression. The coordinator knows this medication works by which of the following mechanisms?
- Depleting circulating T-lymphocytes.
- Inhibiting the production of Interleukin-2 (IL-2).
- Binding to the IL-2 receptor on activated T-cells. (Correct answer)
- Blocking the mTOR signaling pathway in lymphocytes.
Correct answer: Binding to the IL-2 receptor on activated T-cells.
Basiliximab is a monoclonal antibody that specifically targets the alpha chain (CD25) of the Interleukin-2 (IL-2) receptor on the surface of activated T-lymphocytes. By blocking this receptor, it prevents IL-2 from binding and signaling for T-cell proliferation, thereby preventing an acute rejection response. It does not deplete T-cells (like ATG), inhibit IL-2 production (like calcineurin inhibitors), or block the mTOR pathway (like sirolimus).
Question 3: A patient is 48 hours post-liver transplant. The transplant coordinator is reviewing labs and notes a progressively rising INR to 3.0, AST >3000 IU/L, metabolic acidosis, and minimal bile output. These findings are most indicative of which immediate postoperative complication?
- Biliary stricture
- Acute cellular rejection
- Primary Graft Non-function (PNF) (Correct answer)
- Hepatic artery stenosis
Correct answer: Primary Graft Non-function (PNF)
Primary Graft Non-function (PNF) is a catastrophic failure of the transplanted liver to function, occurring within the first week. Its hallmark signs include severe coagulopathy (INR ≥2.5), markedly elevated transaminases (AST >2000-3000), metabolic acidosis, and little to no bile production. Acute rejection typically occurs later, and while biliary strictures and hepatic artery stenosis are serious, they would not usually cause such a global and rapid systemic collapse.
Question 4: A patient 12 hours post-bilateral lung transplant develops progressive hypoxemia with increasing oxygen requirements and diffuse infiltrates on chest x-ray. Hemodynamics are stable and there is no evidence of fluid overload. Which complication is the most likely cause?
- Primary Graft Dysfunction (PGD) (Correct answer)
- Hospital-acquired pneumonia
- Acute cellular rejection
- Post-transplant lymphoproliferative disorder (PTLD)
Correct answer: Primary Graft Dysfunction (PGD)
Primary Graft Dysfunction (PGD) is a form of acute lung injury that is a common and serious complication within the first 72 hours after lung transplantation. It is characterized by hypoxemia and radiographic infiltrates not attributable to other causes like pneumonia, fluid overload, or rejection. Pneumonia and acute rejection are less likely in this immediate timeframe, and PTLD is a much later complication.
Question 5: A kidney transplant recipient is started on a standard postoperative regimen of high-dose corticosteroids and tacrolimus. The transplant coordinator should be vigilant in monitoring the patient for which common metabolic side effect?
- Hypokalemia
- Hyponatremia
- Hypoglycemia
- Hyperglycemia (Correct answer)
Correct answer: Hyperglycemia
Both high-dose corticosteroids and tacrolimus have significant diabetogenic effects. Corticosteroids induce insulin resistance, while tacrolimus is directly toxic to pancreatic beta-cells, impairing insulin secretion. The combination puts the patient at high risk for developing hyperglycemia and new-onset diabetes after transplantation (NODAT).
Question 6: A transplant coordinator is preparing discharge education for a liver recipient. Which medication is routinely prescribed for prophylaxis against Pneumocystis jirovecii pneumonia (PJP) in the initial postoperative period?
- Valganciclovir
- Trimethoprim-sulfamethoxazole (Correct answer)
- Nystatin suspension
- Fluconazole
Correct answer: Trimethoprim-sulfamethoxazole
Trimethoprim-sulfamethoxazole is the first-line agent recommended for the prevention of Pneumocystis jirovecii pneumonia (PJP), an opportunistic fungal infection, in solid organ transplant recipients. Prophylaxis is typically recommended for at least 6-12 months post-transplant during the period of highest immunosuppression. Valganciclovir is for CMV, while Nystatin and Fluconazole are for other fungal infections like thrush.
CCTC - Certified Clinical Transplant Coordinator Immediate Postoperative Care Questions and Answers
A kidney transplant recipient, 6 hours postoperative, experiences a sudden decrease in urine output from 150 mL/hr to less than 20 mL/hr.
The patient's blood pressure and central venous pressure are stable.
What is the MOST appropriate initial action for the transplant coordinator to anticipate?