Organ donation is one of the most profound gifts one human can give to another, yet the medical pathways that make it possible are often misunderstood. When discussing deceased organ donation, two distinct medical pathways determine how organs are recovered: Donation after Brain Death (DBD) and Donation after Circulatory Death (DCD) or due to Cardiac Death.

While both result in the ultimate gift of life, understanding how they differ helps demystify the donation process.

Donation after Brain Death (DBD)

Brain death is defined as the irreversible cessation of all brain activity, including the brainstem. It is legally and medically recognized as death.

• How it happens: Often caused by severe traumatic head injury, stroke, or major brain hemorrhage.

• The donation process: Because the brainstem no longer functions, the body cannot breathe on its own. However, mechanical ventilators and medications keep the heart beating and oxygen flowing through the bloodstream artificially. This keeps organs well-oxygenated until surgical recovery takes place, allowing a wider window for matching and transplanting heart, lungs, liver, kidneys, pancreas, and intestines.

Donation after Circulatory Death (DCD)

Circulatory death occurs when a person’s heart permanently stops beating and circulation of blood ceases.

• How it happens: DCD typically applies when a patient has a severe, non-survivable illness or neurological injury, but does not meet the strict criteria for brain death. In these cases, the family and medical team decide to withdraw life-sustaining treatment.

• The donation process: Once support is withdrawn and the patient’s heart stops naturally, a mandatory waiting period (usually 5 minutes) is observed to confirm death before organ recovery begins. Because oxygen flow stops prior to recovery, speed and advanced preservation technologies—such as machine perfusion—are critical. Primarily, only tissues such as corneas (eyes), skin, bone, and blood vessels can be donated.

Whether through DBD or DCD, every donor has the potential to save up to eight lives and restore health to many more.