Even though it makes up only about 2 percent of total body weight, it uses roughly 20 percent of the body’s oxygen supply. The brain cannot survive without oxygen, and honestly, it can’t last long without it. It is one of the most oxygen-dependent organs we have. It has very limited storage, so when circulation is cut off even briefly, it becomes extremely fragile. In an interview with HT Lifestyle, Dr Sumeet Pawar, MBBS, DNB (Neurosurgery), minimally invasive brain and spine surgeon, explains what happens when blood flow to the brain stops.
Because they carry small reserves, yet the brain is different, other organs can manage a little.
Why It Matters
People who get through a cardiac arrest might return to normal; other patients—depending on how long the oxygen was cut off—can need neurological rehabilitation. Spot it early, call for emergency help immediately, and then follow a structured rehab plan; all of that matters for better results.
What goes on inside the brain?
The longer the brain sits without oxygen, the higher the chance of lasting neurological harm, such as memory trouble, problems with speech, movement issues, or possibly brain death. Usually, the person goes unconscious after 10 to 20 seconds. If circulation isn’t brought back within 3 to 5 minutes, irreversible damage to the brain tissue can begin.
Dr Sumeet said, “When oxygen-rich blood no longer makes it to the brain, the cells start misfiring within seconds.
