How Long Can Someone Be Unconscious Without Brain Damage?

How long can someone remain unconscious?

What are the long term effects of being knocked unconscious.

It depends on the severity of the injury.

If you lose consciousness briefly, and suffer a concussion, 75 to 90 percent of people will fully recover in a few months.

But severe damage to the brain can cause unconsciousness for days, weeks, or even longer..

Can someone in an induced coma hear you?

They cannot speak and their eyes are closed. They look as if they are asleep. However, the brain of a coma patient may continue to work. It might “hear” the sounds in the environment, like the footsteps of someone approaching or the voice of a person speaking.

How can you tell if someone is sleeping or unconscious?

Being asleep is not the same as being unconscious. A sleeping person will respond to loud noises or gentle shaking. An unconscious person will not.

What’s the longest someone was in a coma?

Elaine EspositoElaine Esposito (December 3, 1934 – November 25, 1978) held the record for the longest period of time in a coma according to Guinness World Records, having lost consciousness in 1941 and eventually dying in that condition more than 37 years later.

What was the longest coma?

37 years and 111 daysOn Aug. 6, 1941, 6-year-old Elaine Esposito went to the hospital for a routine appendectomy. She went under general anesthetic and never came out. Dubbed the “sleeping beauty,” Esposito stayed in a coma for 37 years and 111 days before succumbing in 1978 — the longest-ever coma, according to Guinness World Records.

What happens when you are unconscious too long?

Potential complications of being unconscious for a long period of time include coma and brain damage. A person who received CPR while unconscious may have broken or fractured ribs from the chest compressions. The doctor will X-ray the chest and treat any fractures or broken ribs before the person leaves the hospital.

What is the chance of surviving a coma?

Within six hours of coma onset those patients who show eye opening have almost a one in five chance of achieving a good recovery whereas those who do not have a one in 10 chance. Those who show no motor response have a 3% chance of making a good recovery whereas those who show flexion have a better than 15% chance.

Is brain dead and coma the same thing?

Brain death: Irreversible cessation of all functions of the entire brain, including the brain stem. A person who is brain dead is dead, with no chance of revival. Coma: A state of profound unresponsiveness as a result of severe illness or brain injury.

How long can a person be unconscious before brain damage?

Severe brain injury is usually defined as being a condition where the patient has been in an unconscious state for 6 hours or more, or a post-traumatic amnesia of 24 hours or more.

Can someone in a coma hear you?

Someone who is in a coma is unconscious and has minimal brain activity. … Additionally a person in a coma fails to respond normally to painful stimuli, light, or sound; lacks a normal sleep-wake cycle and, does not initiate voluntary actions, being unable to consciously feel, speak, hear, or move.

Can an unconscious patient hear you?

Studies of patients’ memories of their unconscious state indicate that they heard and understood conversations. Lawrence (1995) found that unconscious patients could hear and respond emotionally to verbal communication.

What’s the difference between unconscious and unresponsive?

Unconsciousness is an unresponsive state. A person who is unconscious may seem like they are sleeping, but may not respond to outside events, such as loud noises or being touched or shaken. Fainting is a type of unconsciousness that comes on suddenly and may only last a few seconds.

How do you tell if your brain is damaged?

Physical symptoms of brain damage include:Persistent headaches.Extreme mental fatigue.Extreme physical fatigue.Paralysis.Weakness.Tremors.Seizures.Sensitivity to light.More items…•

How long can someone be in a coma and still wake up?

Recovering from a coma A coma usually only lasts a few weeks, during which time the person may start to gradually wake up and gain consciousness, or progress into a different state of unconsciousness called a vegetative state or minimally conscious state.

Can a coma last for years?

Usually, a coma does not last more than a few weeks. Sometimes, however, a person stays in a coma for a long time — even years — and will be able to do very little except breathe on his or her own. Most people do come out of comas. Some of them are able to return to the normal lives they had before they got sick.