CPT® Code 0585T

1. Indications

The islet cell transplant procedure is indicated for patients with Type 1 diabetes who meet specific criteria. The following conditions are typically considered for this procedure:

• Type 1 Diabetes Mellitus Patients diagnosed with Type 1 diabetes, characterized by the autoimmune destruction of pancreatic beta cells, leading to insulin deficiency.
• Severe Hypoglycemia Individuals experiencing recurrent episodes of severe hypoglycemia that pose a risk to their health and safety.
• Inadequate Glycemic Control Patients who have difficulty achieving adequate glycemic control despite intensive insulin therapy and continuous glucose monitoring.
• Age and Health Status Candidates must be within an appropriate age range and have a suitable health status to undergo surgical procedures, including the ability to tolerate immunosuppressive therapy.

2. Procedure

The islet cell transplant procedure involves several critical steps to ensure successful transplantation of the islet cells into the recipient's pancreas. The following procedural steps are outlined:

• Step 1: Donor Islet Cell Harvesting The procedure begins with the harvesting of islet cells from a deceased donor's pancreas. This process utilizes an automated filtering method to extract the islets while preserving their viability for transplantation.
• Step 2: Preparation of Islet Cells Once harvested, the islet cells undergo a purification process to remove any non-islet tissue. This preparation is crucial to ensure that only viable islet cells are used for transplantation.
• Step 3: Catheter Placement The next step involves the placement of a catheter into the portal vein of the liver. This is typically performed under imaging guidance, such as X-ray or ultrasound, to ensure accurate placement.
• Step 4: Infusion of Islet Cells After the catheter is positioned correctly, the prepared donor islet cells are infused through the catheter directly into the portal vein. This infusion allows the islet cells to migrate to the liver, where they can begin to function and produce insulin.
• Step 5: Monitoring and Recovery Following the infusion, the patient is monitored for any immediate complications. The entire procedure generally takes about one hour, after which the patient will be placed under observation for recovery.

3. Post-Procedure

After the islet cell transplant, patients are required to adhere to a strict regimen of immunosuppressive medications to prevent rejection of the transplanted islet cells. This medication regimen is critical for the long-term success of the transplant. Patients will also undergo regular follow-up appointments to monitor their blood glucose levels, assess the function of the transplanted islets, and manage any potential complications. Recovery times may vary, and patients are advised to maintain a healthy lifestyle, including a balanced diet and regular physical activity, to support their overall health and the success of the transplant.