Organ and Tissue Transplantation and GVHD

Organ and Tissue Donation

  • Organ and tissue donation is the process of recovering organs and tissues from donors to transplant into others.

    • Types of Donors:

    • Living donors

      • Can donate a kidney, part of the liver, or regenerative tissues like bone marrow.

    • Deceased donors

      • Often individuals who have suffered brain death due to trauma, stroke, or catastrophic injuries.

      • Maintained on life support to preserve organ function until recovery.

  • Consent Process:

    • Nursing responsibility to verify advanced directives or wishes are documented before donation.

    • If the donor cannot decide, next of kin can give consent, and documentation must be signed.

  • Local Organization:

    • Southwest Transplant Alliance (STA) in Dallas facilitates organ and tissue donation.

Organ Transplantation

  • Organ transplantation is a surgical procedure where a failing organ is replaced with a healthy one from a donor.

    • Common Transplants:

    • Kidney

    • Liver

    • Heart

    • Lung

    • Pancreas

    • Intestine

    • Careful selection of donor and recipient based on medical criteria is crucial (ex: blood and tissue typing).

    • Multiple organs can be transplanted simultaneously.

  • Statistics:

    • Over 116,000 people are on the organ transplant list.

    • Fewer than 35,000 receive transplants annually.

    • Kidney, heart, and liver are in highest demand.

  • Eligibility Considerations:

    • Patients not eligible if:

    • Medically unstable

    • Current/recent cancer diagnosis (e.g., metastatic lung cancer)

    • Morbid obesity

  • Incompatibility Avoidance:

    • Matches based on ABO blood typing and human leukocyte antigen (HLA) typing.

    • Closer HLA matches reduce rejection risk.

Transplant Rejection

  • Definition:

    • Transplant rejection occurs when the immune system recognizes the foreign organ/tissue and attacks it.

  • Immunosuppression Therapy:

    • Medications used to suppress/ weaken the immune system to prevent rejection.

    • Balance necessary: must prevent rejection while avoiding infections and cancers.

  • Major Immunosuppressive Agents:

    • Calcineurin Inhibitors:

    • Example: Tacrolimus blocks T cell activation and IL-2 production.

    • Antiproliferative Agents:

    • Example: Mycophenolate mofetil inhibits TMB cell proliferation involved in rejection.

    • Corticosteroids:

    • Example: Prednisone reduces inflammation and suppresses immune cells.

    • Mechanistic Target of Rapamycin (mTOR) Inhibitors:

    • Example: Sirolimus blocks pathways involved in T cell activation.

    • Induction Agents:

    • Example: Basiliximab depletes/inhibits T cells during early transplant period.

  • Complications of Organ Transplants:

    • Rejection of organ

    • Infections (recipient or donor)

    • Postsurgical complications (e.g., bleeding, organ damage)

    • Adverse medication side effects (e.g., nephrotoxicity, neurotoxicity)

    • Graft failure, PTLD (Post Transplant Lymphoproliferative Disorder) due to EBV.

  • Signs and Symptoms of Rejection:

    • Common in kidney transplants: increased creatinine, flank pain, decreased urine output.

    • Chronic rejection symptoms: weight loss, organ failure, graft dysfunction.

Nursing Management Before and After Transplantation

  • Pre-Transplant Education:

    • Explain transplant procedures and expected lifestyle changes.

    • Discuss potential risks and complications.

    • Importance of psychosocial support.

  • Post-Op Monitoring and Care:

    • Observe for signs/symptoms of rejection and medication side effects.

    • Reinforce adherence to healthcare provider's care regimen.

    • Monitor surgical site healing; provide nutritional support.

    • Teach patients to recognize infection signs and when to seek help.

  • Examples of Patient Care:

    • Self-donor of bone marrow: teach dietary needs for recovery and hygiene to reduce infection risk.

    • Kidney transplant: increase immunosuppression if signs of rejection occur.

    • Assess patients on peritoneal dialysis to ensure they are empty before surgery to avoid fluid overload.

    • Manage fluid and electrolyte balance post-kidney transplant, especially during initial diuresis.

Graft versus Host Disease (GVHD)

  • Definition:

    • Occurs when donor's immune cells recognize recipient's cells as foreign and attack them.

  • Types of GVHD:

    • Most common with hematopoietic stem cell transplants.

    • Acute GVHD:

    • Develops 7-30 days after transplantation.

    • Chronic GVHD:

    • Develops over several months.

  • Signs and Symptoms:

    • Skin: fever, rash (particularly hands), itching.

    • Liver: jaundice, potential hepatic failure.

    • GI tract: abdominal pain, severe diarrhea.

  • Treatment:

    • Primarily involves immunosuppressive medications to suppress donor T cells.

    • Corticosteroids are first-line therapy.

    • Close monitoring, education for early recognition to prevent complications.