CCTC - Certified Clinical Transplant Coordinator Organ-Specific Transplant Knowledge Questions and Answers — Questions and Answers
Question 1: A patient who received a simultaneous pancreas-kidney (SPK) transplant 48 hours ago develops sudden hyperglycemia and requires an insulin infusion. What is the most likely cause of this early pancreas allograft dysfunction?
- Hyperacute rejection
- Graft pancreatitis
- Venous thrombosis of the graft (Correct answer)
- Cytomegalovirus (CMV) infection
Correct answer: Venous thrombosis of the graft
Venous thrombosis is the most common cause of early technical failure and graft loss in pancreas transplantation, often occurring within the first few days. The pancreas is a low-flow organ, making it susceptible to thrombosis. Hyperacute rejection is extremely rare with modern crossmatching. Graft pancreatitis typically presents with pain and elevated amylase/lipase but may not cause immediate, complete loss of endocrine function. CMV infection is a later complication.
Question 2: Which of the following laboratory values is a component of the Model for End-Stage Liver Disease-Sodium (MELD-Na) score used for adult liver allocation?
- Serum Albumin
- Total Bilirubin (Correct answer)
- Aspartate aminotransferase (AST)
- Prothrombin Time (PT)
Correct answer: Total Bilirubin
The MELD-Na score is calculated using four variables: total bilirubin, serum creatinine, International Normalized Ratio (INR), and serum sodium. While serum albumin and PT are important measures of liver function, they are not direct components of the current MELD-Na formula used for organ allocation (INR is the standardized value derived from PT).
Question 3: According to long-term outcome data, which of the following is a leading cause of mortality in heart transplant recipients AFTER the first year post-transplant?
- Primary graft dysfunction
- Acute cellular rejection
- Cardiac Allograft Vasculopathy (CAV) (Correct answer)
- Bacterial pneumonia
Correct answer: Cardiac Allograft Vasculopathy (CAV)
While primary graft dysfunction and infections are major causes of mortality in the early post-transplant period, Cardiac Allograft Vasculopathy (CAV) and malignancies are the leading causes of death after the first year. CAV is an accelerated, diffuse form of coronary artery disease in the transplanted heart that limits long-term graft survival.
Question 4: A transplant coordinator is reviewing data for a patient with idiopathic pulmonary fibrosis being evaluated for the lung transplant waitlist. Which of the following factors will contribute MOST significantly to increasing the patient's Lung Allocation Score (LAS) or Composite Allocation Score (CAS)?
- A six-minute walk distance of 350 meters
- A serum creatinine of 1.0 mg/dL
- A diagnosis of well-controlled type 2 diabetes
- The requirement for 6 L/min of continuous supplemental oxygen at rest (Correct answer)
Correct answer: The requirement for 6 L/min of continuous supplemental oxygen at rest
The Lung Allocation Score (LAS)/Composite Allocation Score (CAS) is designed to prioritize sicker patients who have a higher risk of waitlist mortality. The need for and amount of supplemental oxygen at rest is a critical variable that directly reflects the severity of respiratory failure and significantly increases the medical urgency component of the score. The other factors are either normal findings or less heavily weighted in the calculation.
Question 5: A kidney transplant recipient's biopsy confirms acute antibody-mediated rejection (AMR) with C4d staining and circulating donor-specific antibodies (DSAs). In addition to optimizing maintenance immunosuppression, which therapy is specifically aimed at the physical removal of the pathogenic circulating antibodies?
- Plasmapheresis (Plasma Exchange) (Correct answer)
- High-dose intravenous corticosteroids
- Antithymocyte globulin (ATG)
- Rituximab
Correct answer: Plasmapheresis (Plasma Exchange)
Plasmapheresis, or plasma exchange, is a therapeutic procedure that directly removes antibodies, including DSAs, from the patient's bloodstream. While corticosteroids, ATG, and Rituximab are used to treat AMR by modulating the immune response (targeting T-cells and B-cells), only plasmapheresis physically removes the existing antibodies causing the damage.
Question 6: A transplant coordinator is evaluating a patient for an intestinal transplant. Which of the following is considered a primary indication for transplantation due to a life-threatening complication of total parenteral nutrition (TPN)?
- Patient preference to resume an oral diet
- A single episode of catheter-related line sepsis
- Development of TPN-associated progressive liver disease (PNALD) (Correct answer)
- Frequent high stoma output requiring IV fluid replacement
Correct answer: Development of TPN-associated progressive liver disease (PNALD)
While all options are related to intestinal failure, the development of progressive, potentially irreversible parenteral nutrition-associated liver disease (PNALD) is a life-threatening complication and a primary indication for intestinal transplantation. This complication signifies that the life-sustaining therapy (TPN) is now causing irreversible damage to another vital organ.
CCTC - Certified Clinical Transplant Coordinator Organ-Specific Transplant Knowledge Questions and Answers
A patient who received a simultaneous pancreas-kidney (SPK) transplant 48 hours ago develops sudden hyperglycemia and requires an insulin infusion.
What is the most likely cause of this early pancreas allograft dysfunction?