Kidney Transplant I: Introduction

A kidney transplant replaces a non-functioning kidney with a healthy donor organ, typically for patients with end-stage renal disease (ESRD). This surgical procedure offers patients significantly improved quality of life compared to other renal replacement therapies. The transplanted kidney restores the body's ability to filter waste and regulate fluid balance.

Key contraindications include advanced cancers, chronic respiratory failure, untreated infections like tuberculosis, and uncontrolled heart disease. Candidates with severe peripheral artery disease, aortic aneurysms, or extensive vascular disease may also be excluded. Additionally, poorly controlled diabetes, severe obesity, or inability to quit smoking despite interventions can disqualify potential recipients.

Histocompatibility studies, including Human Leukocyte Antigen (HLA) typing and crossmatching, assess donor-recipient compatibility to minimize rejection risk. These tests ensure the recipient's immune system is more likely to accept the transplanted kidney. Crossmatching is performed during initial evaluation and repeated close to transplant surgery to detect any new antibodies against the donor.

Living donors receive comprehensive health evaluations including complete health history, physical examination, and diagnostic tests such as glomerular filtration rate (GFR) assessment to evaluate kidney function. Screening for infections like hepatitis B and C, HIV, and cytomegalovirus is standard. Imaging such as renal ultrasound or CT scan assesses kidney anatomy, and psychological assessment ensures emotional stability and informed consent.

Living donor kidneys offer improved patient and graft survival rates due to minimal cold time, the period when the kidney remains outside the body at low temperatures. Reduced cold time preserves organ viability and function, enabling faster recovery of kidney function. Additionally, living donors allow for planned surgery and immediate availability, optimizing transplant timing and outcomes.

Unresolved psychosocial issues such as poor adherence to treatment plans, substance abuse, or inability to comply with post-transplant medical regimens can disqualify candidates. Transplant centers assess whether patients understand the benefits and risks of transplantation and can commit to lifelong immunosuppressive therapy and follow-up care. Emotional stability and demonstrated reliability are essential for successful long-term outcomes.

Deceased donors, typically individuals declared brain dead from stroke, cerebral trauma, or cardiac arrest complications, must be maintained on a ventilator to preserve cardiovascular function. Healthcare providers maintain effective cardiovascular function and ventilation until organ retrieval to ensure the kidney remains viable for transplantation. This careful management prevents organ deterioration during the retrieval process.