Brain death is defined as the irreversible loss of all brain and brain stem functions. Unlike brain death, in a vegetative state, the brain stem continues to function, allowing some basic reflexes and breathing to persist. Brain death typically occurs due to brain edema, hypoxia, and subsequent necrosis (loss of brain tissue vitality resulting from the interruption of blood supply) caused by trauma or vascular conditions such as bleeding or embolism.

Modern imaging techniques such as Doppler ultrasonography and CT angiography confirm the absence of cerebral blood flow in cases of brain death. Patients diagnosed with brain death are considered medically and legally dead, and recovery is not possible. Despite all advanced life-support measures provided in intensive care units, other vital organs also lose their function within approximately 72 hours.

Diagnosis and Medical Criteria

Organ transplantation from a cadaveric donor cannot be performed without an officially established diagnosis of brain death. This diagnosis must be confirmed by two independent physicians — one being a Neurologist or Neurosurgeon, and the other an Anesthesiologist or Intensive Care Specialist. These professionals verify the irreversible cessation of brain activity according to strict medical and ethical standards.

Statistical Overview

In Europe and the United States, the brain death reporting rate ranges from 10 to 30 cases per million population. Unfortunately, in Turkey, this rate remains significantly lower at approximately 2.5 to 3 per million. Each year, between 1,500 and 1,800 cases of brain death are officially reported in Turkey; however, only 25% of these individuals become actual organ donors due to lack of consent from their families.

Impact on Organ Transplantation

Because of low donation rates, only about 20% of transplants in Turkey are performed using cadaveric organs, compared to much higher rates in Western countries. If all organs from deceased donors were utilized, it would be possible to perform approximately 1,200 additional liver transplants and 2,400 additional kidney transplants every year. Instead, many viable organs go to waste while thousands of patients remain on waiting lists.

Given that Turkey currently performs around 3,000–3,500 kidney transplants and 1,000–1,500 liver transplants annually, the potential number of lives that could be saved through increased organ donation is significant. This underscores the vital importance of raising awareness and promoting organ donation as a life-saving humanitarian act.