crosmuscle.blogg.se - Cough reflex vs gag reflex nerve

COUGH REFLEX VS GAG REFLEX NERVE FREE

When the CO2 level reaches a level of 55 mm Hg, the active brain will cause the patient to breathe spontaneously. With the cessation of breathing by the machine, the body will immediately start to build up metabolic waste of carton dioxide (CO2) in the blood.

The patient is temporarily removed from life support (the ventilator).

The patient has no spontaneous respiration.

The movement of the breathing tube (in and out) or the insertion of a smaller tube down the breathing tube will cause a gag reflex in a comatose patient, but will not elicit a reflex in the brain-dead patient. The drastic change in ear temperature will cause a violent eye twitching by the intact brain but no reaction in the brain-dead patient.

While holding the eyes open, ice water is injected into the ear canal.

COUGH REFLEX VS GAG REFLEX NERVE FREE

The patient's ear canal is inspected to ensure an intact tympanic membrane and that the ear is free of wax.

The patient has no oculovestibular reflex.

The resulting stimulation pressure will cause motion of the extremities, either purposeful or primitive posturing, in the living-brain patient, but none in the brain-dead patient. The patient's eyebrow ridge is compressed with the thumb.

The patient has no response - either purposeful or posturing - to supra-orbital stimulation.

The intact brain will want the eye to blink. A cotton swab is dragged across the cornea while the eye is held open. The active brain will allow a roving motion of the eyes the non-functional brain will not. The patient's eyes are opened and the head turned from side to side.

The patient has no oculocephalic reflex.In the non-viable brain, no impulse will be generated. In the normal brain, the brain will send an impulse back to the eye to constrict the pupil. The light will activate the optic nerve and send a message to the brain. The patient's eyes are opened and a very bright light is shined into the pupil. The patient has no movements - the arms and legs are raised and allowed to fall to see if there are adjacent movements, restraint or hesitation in the fall. The patient is flaccid, with areflexic extremities.The patient has no response to command, verbal, visual or otherwise.