A coma rarely lasts more than 2 to 4 weeks. Some patients may regain a degree of awareness after persistent vegetative state
persistent vegetative state
A persistent vegetative state (PVS) or post-coma unresponsiveness (PCU) is a disorder of consciousness in which patients with severe brain damage are in a state of partial arousal rather than true awareness.
https://en.wikipedia.org › wiki › Persistent_vegetative_state
Typically, a coma does not last more than a few days or couple of weeks. In some rare cases, a person might stay in a coma for several weeks, months or even years. Depending on what caused the person to go into a coma, some patients are able to return to their normal lives after leaving the hospital.
Coma is the body's least responsive level of consciousness before death. Approximately 70% of patients who lapse into coma die without regaining normal consciousness. Comas may last from a few hours to years. Comas outwardly resemble a state of deep sleep, but are actually quite more complex.
the cellular mechanism for ageing has been associated with progressive shortening of telomere length on the ends of each chromosome with each cell cycle.. in the contect of this, a coma wouldnt necessarily keep you young, but you would age just the same.
People in a coma are completely unresponsive. They do not move, do not react to light or sound and cannot feel pain. Their eyes are closed. The brain responds to extreme trauma by effectively 'shutting down'.
A coma is a prolonged state of unconsciousness. During a coma, a person is unresponsive to their environment. The person is alive and looks like they are sleeping. However, unlike in a deep sleep, the person cannot be awakened by any stimulation, including pain.
Patients in a coma appear unconscious. They do not respond to touch, sound or pain, and cannot be awakened. Their brains often show no signs of the normal sleep-wakefulness cycle, which means they are unlikely to be dreaming.
Nearly every coma patient who reaches the state of post-traumatic amnesia will make a functional recovery. In fact, patients who transition from a coma to a minimally conscious state within 8 weeks are most likely to transition to post-traumatic amnesia and regain higher functions.
Because patients who are in a coma can't eat or drink on their own, they receive nutrients and liquids through a vein or feeding tube so that they don't starve or dehydrate. Coma patients may also receive electrolytes -- salt and other substances that help regulate body processes.
Usually, coma patients have their eyes closed and cannot see what happens around them. But their ears keep receiving sounds from the environment. In some cases, the brains of coma patients can process sounds, for example the voice of someone speaking to them .
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.
They make sure the person gets fluids, nutrients, and any medicines needed to keep the body as healthy as possible. These are sometimes given through a tiny plastic tube inserted in a vein or through a feeding tube that brings fluids and nutrients directly to the stomach.
They are not “brain dead”; they have a functioning brain stem and can usually breathe on their own. But they have no awareness of themselves or their environment. And the longer they remain unconscious the less likely it is that they will ever become conscious again.
Sometimes the cause of a coma can be completely reversed, and the affected person will regain normal function. Recovery usually occurs gradually. A person with severe brain damage might have permanent disabilities or never regain consciousness.
They won't normally respond to sound or pain, or be able to communicate or move voluntarily, and basic reflexes, such as coughing and swallowing, will be greatly reduced. They may be able to breathe on their own, although some people require a machine to help them breathe.
Even though those in a persistent vegetative state lose their higher brain functions, other key functions such as breathing and circulation remain relatively intact. Spontaneous movements may occur, and the eyes may open in response to external stimuli. Individuals may even occasionally grimace, cry, or laugh.
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.
When someone is in a coma, they cannot interact with their environment. The brain is still working, however, and the degree of brain activity varies from patient to patient. New tools for mapping brain activity have helped doctors illuminate what is happening inside the brain, which informs their treatment and care.
If the unconsciousness persists, it is called coma. After a couple of weeks in coma due to damage to the arousal system, the remaining structures in the brainstem and the forebrain reorganize their activity, and the patient recovers apparent wake-sleep cycles, with eye opening and faster EEG waves during the day.
What are good signs someone is coming out of a coma?
Signs of coming out of a coma include being able to keep their eyes open for longer and longer periods of time and being awakened from “sleep” easier—at first by pain (pinch), then by touch (like gently shaking of their shoulder), and finally by sound (calling their name).
Post-traumatic amnesia typically occurs after a survivor wakes up from a coma, a period of unconsciousness. During this time the survivor may not be able to recall certain memories. This can last from a few minutes to a couple weeks, depending on the severity of the brain injury.