persistent vegetative state

(redirected from Permanent vegetative state)
Also found in: Dictionary, Encyclopedia.

state

 [stāt]
condition or situation.
alpha state the state of relaxation and peaceful awakefulness associated with prominent alpha brain wave activity.
anxiety state the condition of experiencing undue anxiety, as in anxiety disorders.
excited state the condition of a nucleus, atom, or molecule produced by the addition of energy to the system as the result of absorption of photons or of inelastic collisions with other particles or systems.
ground state the condition of lowest energy of a nucleus, atom, or molecule.
persistent vegetative state a condition of profound nonresponsiveness in the wakeful state caused by brain damage at whatever level and characterized by a nonfunctioning cerebral cortex, the absence of any discernible adaptive response to the external environment, akinesia, mutism, and inability to signal; the electroencephalogram may be isoelectric or show abnormal activity. Vegetative states raise ethical questions regarding appropriate care, use of resources, and allowing a patient to die.
refractory state a condition of subnormal excitability of muscle and nerve following excitation.
resting state the physiologic condition achieved by complete bed rest for at least 1 hour.
steady state dynamic equilibrium.

persistent vegetative state (PVS),

vegetative state (q.v.) of prolonged duration (defined in different sources as duration of longer than 1 month, 1 year, or 2 years); usually permanent.
See also: vegetative.

persistent vegetative state

a state of wakefulness accompanied by an apparent complete lack of cognitive function, experienced by some patients in an irreversible coma. Vegetative functions and brainstem reflexes are intact, but the cortex is permanently damaged.

persistent vegetative state

Choice in dying A condition caused by injury, disease or illness in which a Pt has suffered a loss of consciousness, with no behavioral evidence of awareness of self or surroundings in a learned manner, other than reflex activity of muscles and nerves for low level conditioned response, and from which to a reasonable degree of medical probability, there can be no recovery; PVS is characterized by a prolonged loss of upper cortical function that may follow acute–eg, infections, toxins, trauma, or vascular events, or chronic–eg, degenerative events; in PVS, Pt is bed-ridden, nutritional support is completely passive, either parenteral or by NG tube; PVS Pts do not require respiratory support or circulatory assistance for survival and are in a state of chronic wakefulness which may be accompanied by spontaneous eye opening, grunts or screams, brief smiles, sporadic movement of facial muscles and limbs; while the eyes blink upon stimulation, they do not do so in response to visual threats; some Pts chew or clamp their teeth; urinary and fecal incontinence is universal; recovery occurs within the 1st month–if at all, recovery is rare beyond the 3rd month. See Advanced directives, DNR, Harvard criteria, Living will, Quinlan. Cf Procurement.
Persistent vegetative state–criteria
1.  No evidence of awareness of environment; inability to interact with others
.
2.  No evidence of sustained, reproducible, purposeful, or voluntary behavioral responses to visual, tactile, auditory, or noxious stimuli
.
3.  No evidence of language comprehension or expression
.
4.  Intermittent wakefulness manifested by the presence of sleep-wake cycles
.
5.  Sufficiently preserved hypothalamic and brain-stem autonomic functions to permit survival with medical and nursing care
.
6.  Bowel and bladder incontinence
.
7. Variably preserved cranial nerve reflexes (pupillary, oculocephalic, corneal, vestibulo-ocular, gag) and spinal reflexes
.

per·sis·tent ve·ge·ta·tive state

(PVS) (pĕr-sis'tĕnt vej'ĕ-tā-tiv stāt)
Vegetative state of prolonged duration (defined in different sources as duration of longer than 1 month, 1 year, or 2 years); usually permanent.
See also: vegetative

persistent vegetative state

A condition caused by diffuse lesions of the thalami, the cortical neurons or of the white matter tracts that connect them. The disorder has proved difficult to define because of uncertainties as to the real meaning of ‘consciousness’, ‘awareness’ and ‘wakefulness’. Patients in a persistent vegetative state can breathe without mechanical assistance. Heart, kidney and intestinal functions are normal and the bladder and bowels empty automatically. At times they appear to be awake. They will respond to painful stimuli by opening their eyes, moving their limbs, breathing more quickly, and occasionally grimacing. The type and degree of brain damage indicates, however, that they cannot perform any of the higher neurological or mental functions known to be essential for any mental processes or appreciation of their situation.

per·sis·tent ve·ge·ta·tive state

(pĕr-sis'tĕnt vej'ĕ-tā-tiv stāt)
Condition of a patient of prolonged duration (defined in different sources as duration of longer than 1 month, 1 year, or 2 years); usually permanent.
References in periodicals archive ?
Neither persistent or permanent vegetative states nor MCS are pathologically or pathophysiologically homogenous conditions, and while such terms may make sense now as clinical designations, further investigation with newer technologies will surely lead to finer distinctions and improved prognostication.
She said: "We were told he would die, and if he did survive they said he would be in a permanent vegetative state.
Over 15 years, including during the recent flurry of activity, numerous judges - many of them conservative Republicans - have heard the evidence and ruled every time that Michael Schiavo has legal standing in the case and that Terri's desires (therefore, her hopes) were that she not be kept alive in a permanent vegetative state.
The treating doctor and a consulting doctor find the patient is either in a terminal condition, in a permanent vegetative state, or has an end-stage disease.
The FTAA] is likely to be in a permanent vegetative state.
Never again will I put up with shop assistants talking to me as if I was in a permanent vegetative state.
THERE are few cases sadder than the lad who, for the last 12 years, has been in a permanent vegetative state in a Rochdale nursing home, after being hit by a car in Newmarket.
The problem with the Nancy Cruzan case, in which the family of a woman in a permanent vegetative state attempted to have her life support removed, was not that the law required evidence of the patient's wishes but that the legal standard of proof was too high.
With regard to euthanasia, Dworkin defends the right of each individual, again on philosophic and constitutional grounds, to end his life when his personal condition is one of endless misery or falls into the void of a permanent vegetative state.
In an exclusive interview with ABC News' Robin Roberts, Texas Democratic gubernatorial nominee Wendy Davis talks about her "difficult decision" to have an abortion in 1996, when doctors told her the baby had severe brain abnormalities and would be deaf, blind and in a permanent vegetative state.
London, May 28 ( ANI ): Formula One legend Michael Schumacher has reportedly spent his 150th day in a medically-induced coma as speculations claim that he may be in a permanent vegetative state for the rest of his life.
Schumacher's wife Corinna and his brother Ralf are now believed to be consulting other specialists in Europe over fears the German racing legend could remain in a permanent vegetative state for the rest of his life.

Full browser ?