CPT® Code 0584T

1. Indications

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

• Type 1 Diabetes Mellitus - Patients with this autoimmune condition are unable to produce insulin due to the destruction of beta cells in the pancreas.
• Severe Hypoglycemia - Individuals experiencing recurrent episodes of severe hypoglycemia that pose a risk to their health may be candidates for islet cell transplantation.
• Inadequate Glycemic Control - Patients who have difficulty achieving stable blood glucose levels despite intensive insulin therapy may benefit from this procedure.
• Desire for Insulin Independence - Patients seeking to reduce or eliminate their dependence on exogenous insulin may be considered for islet cell transplantation.

2. Procedure

The islet cell transplantation procedure involves several critical steps to ensure the successful transfer of islet cells from the donor to the recipient. The following outlines the procedural steps:

• Step 1: Donor Islet Cell Harvesting - The procedure begins with the harvesting of islet cells from a deceased donor's pancreas. This is accomplished using an automated filtering method that efficiently isolates the islet cells while preserving their viability for transplantation.
• Step 2: Preparation of Islet Cells - Once harvested, the islet cells undergo a purification process to remove any impurities. This step is crucial to ensure that only healthy islet cells are prepared for implantation.
• Step 3: Patient Preparation - The recipient patient is prepared for the procedure, which typically involves local anesthesia and sedation. Imaging guidance, such as X-ray and ultrasound, is set up to assist the physician during the transplant.
• Step 4: Catheter Placement - Under imaging guidance, a catheter is carefully inserted into the portal vein of the liver. This step is essential for the subsequent infusion of the donor islets.
• Step 5: Infusion of Islet Cells - The purified donor islet cells are then infused through the catheter into the portal vein, allowing them to migrate to the liver where they can begin to function and produce insulin.
• Step 6: Monitoring and Recovery - After the infusion, the patient is monitored for any immediate complications. The entire procedure typically takes about one hour, after which the patient will be observed for recovery.

3. Post-Procedure

Following the islet cell transplantation, 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 and overall health. It is important for patients to be aware of potential complications, including the risk of infection and the need for ongoing management of their diabetes. The recovery process may vary among individuals, and patients are encouraged to maintain open communication with their healthcare team to address any concerns that may arise during their recovery.