When one hears the word coma, it is often accompanied by a negative connotation. This reaction is understandable, as a coma is a natural response by the body to a trauma of some kind. However, a coma can also be used as a medical tool. This kind of coma is known as a drug-induced coma or medically induced coma, and it has been found to be effective in the treatment of some patients.
Anesthetics are used to induce a coma, as a person is put into a controlled state of unconsciousness. According to Scientific American, putting someone into a drug-induced coma is not all that different than the anesthesiologic process that more than 60,000 people undergo every year prior to surgeries. It’s the slowing of brain function that is necessary to prevent damage that can be done by a lack of blood flow. Anesthesia essentially induces the coma. This state can be controlled and monitored by medical professionals until they deem it safe to bring the patient out of the coma.
According to the American Society of Anesthesiologists, the most common uses of drug-induced comas involve the presence of serious brain injuries, but other causes include drug overdoses and strokes. Such incidents can often cause a person’s brain to swell, which can be extremely dangerous to the organ itself. Blood flow to the brain can be constricted, and in some cases, brain tissue itself can be harmed.
A drug-induced coma puts a person into a deep state of unconsciousness, which allows the brain to rest and thus decreases its swelling. The decrease in swelling can result in less pressure being put on the brain, which lessens the risk of damaging effects.
The most common drugs used to induce a coma are propofol, pentobarbital, and thiopental. These drugs have a continuous effect on a patient, keeping them in a sustained state of unconsciousness that is necessary for healing to begin.
There are some risks associated with medically induced comas. According to National Public Radio, the procedure lowers blood pressure, which can lead to complications for some individuals. There can also be issues with a person’s heart that arise during a coma. Infection in the chest is another problem that can occur, as the cough reflex is suppressed.
This is why consistent monitoring is paramount. Monitoring can include the measurement of brain waves and even the direct measurement of pressure on the brain. Neurological testing, such as use of the Glasgow Scale, might also be employed to assess brain functioning and response to stimuli.