Need for deceased donors Why Number of patients awaiting transplants Number with potential live donors Complications for live donors
Deceased donors Types Donation after brain death - DBD Donation after cardiac death - DCD
The basic principles for excellent cadaveric organ retrieval Identification of potential donors Early confirmation of the brain death consent Prompt notification of the retrieval team Careful and intensive management of the donor Rapid retrieval of the organs
Uniform Determination of Death Act Who is a deceased donor : An individual is considered dead if: 1.irreversible cessation of circulatory and respiratory function or 2.irreversible cessation of all functions of the entire brain , including the brain stem . JAMA Nov 13, 1981 – Vol 246, No. 19
Uniform Determination of Death Act Who is a deceased donor : An individual is considered dead if: 1.irreversible cessation of circulatory and respiratory function or 2.irreversible cessation of all functions of the entire brain , including the brain stem . JAMA Nov 13, 1981 – Vol 246, No. 19
Etiology of Brain Death Severe head trauma Cerebrovascular injury Prolonged cardiac resuscitation or asphyxia Tumors brain surgery
Brain Death
Determination of Brain Death
The Neurologic Examination Coma No evidence of responsiveness. No motor response to noxious stimuli
The Neurologic Examination (cont.) Absence of Brainstem Reflexes No pupillary reflex Absent corneal reflex. Absent - gag oculocephalic testing (doll’s eyes test) Oculovestibular testing – ice water irrigation of each ear canal
The Apnea Test
Brain death declaration ****Detailed documentation
Kidney donor criteria Age less than 65 years S Creatinine normal No chronic kidney disease Serological test Hep B,C, HIV No sepsis malignancy
The basic principles for excellent cadaveric organ retrieval Identification of potential donors Early confirmation of the brain death consent Prompt notification of the retrieval team Careful and intensive management of the donor Rapid retrieval of the organs
For successful deceased donor organ transplant program Members Anaesthetist Coordinators Tissue cross match facilities Retrieval team Transplant team Theatre/ ward/dialysis unit/ ICU staff Etc.
The basic principles for excellent cadaveric organ retrieval Identification of potential donors Early confirmation of the brain death consent Prompt notification of the retrieval team Careful and intensive management of the donor Rapid retrieval of the organs
CHANGES FOLLOWING BRAIN DEATH
Effective Donor/ organ Management Stabilize the donor Manage the donor – To optimize the function and viability of all transplantable organs . Preserve organ “
Donor management guidelines Cardiac Respiratory Renal Endocrine General care
Potential brain dead donor management
Organ retrieval (A) Sternotomy and midline laparotomy with or without bilateral extension . ( B) Exposure of the thoracoabdominal organs
Exposure of aorta and cold perfusion
Cellular changes during ischaemia
Principles of organ preservation Hypothermia Prevention of oedema Prevention of acidosis Neutralise the formation of reactive O2 species
Principles of organ preservation Hypothermia Metablism at 4 C – 10% Ideal temperature - 4 C Prevention of oedema Prevention of acidosis Neutralise the formation of reactive O2 species
BASIC COMPONENTS OF PRESERVATION SOLUTIONS Prevention of oedema Impermeants – saccharides e.g – Mannitol Anions – citrate, gluconate , lactobionate Colloids – dextran,polyethylene glycol Prevention of acidosis Buffers – phosphate and histidine Neutralise the formation of reactive O2 species Antioxidants – glutathione, tryptophan, allopurinol
Preservation solutions Euro-Collins - EC University of Wisconsin - UW Histidine -tryptophan- ketoglutarate - HTK Celsior
Preservation solutions Euro-Collins - EC University of Wisconsin - UW Histidine -tryptophan- ketoglutarate - HTK Celsior
Comparison of select preservation solutions Euro-Collins University of Wisconsin Histidine -tryptophan- ketoglutarate Celsior Impermeant Glucose Lactobionate Mannitol Lactobionate Mannitol Raffinose Mannitol Hydroxyethyl starch Buffer Phosphate Phosphate Histidine Histidine Bicarbonate Antioxidant Mannitol Allopurinol Tryptophan Glutathione glutathione Mannitol Mannitol Histidine Histidine All units expressed in mmol /L.
Comparison of select preservation solutions Euro-Collins University of Wisconsin Histidine -tryptophan- ketoglutarate Celsior Impermeant Glucose Lactobionate Mannitol Lactobionate Mannitol Raffinose Mannitol Hydroxyethyl starch Buffer Phosphate Phosphate Histidine Histidine Bicarbonate Antioxidant Mannitol Allopurinol Tryptophan Glutathione glutathione Mannitol Mannitol Histidine Histidine All units expressed in mmol /L.
In situ hypothermic perfusion and packing of abdominal cavity with ice Lower aorta mobilised Heparin 300 IU/Kg Aorta cannulated Suprarenal aorta clamped Perfused with Cold preservation solution
Kidney removal
Back bench dissection
Make sure all areas are perfused well Back table perfusion
Organ packaging and transport
Transplantation
Future recommendations National protocol development Maintenance of common list for recepient Establishment of donor coordination programme – countrywide Education on recognition of potential donor, donor management, consent Education of public Establish clear legal pathways Train more personnel - ? Surgeons (8 vs 4) Transplantation and post op facilities Operating theatres and ICU facilities Follow up plans