persistent vegetative state


Also found in: Dictionary, Thesaurus, Legal, Acronyms, Encyclopedia, Wikipedia.
Related to persistent vegetative state: Minimally conscious state

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 ?
Some disabled activists seem actually to identify with people in persistent vegetative states.
First, the pope stated that the prognosis for persistent vegetative state is not certain, and he used this statement to justify much of his moral argument.
The better path to take, he said, is crafting your own living will that "gives your general philosophy about terminal illness and life with a significant brain injury, including, but maybe not limited to, persistent vegetative state.
Both decisions stand for the proposition that neither a court order nor the consent of a family member/guardian is necessary in order for a physician to make a Do Not Resuscitate Order in respect of an individual who is in a persistent vegetative state.
This article presents the most current information on persistent vegetative state, including its definition, diagnostic criteria and prognostic indicators, practice issues for the neuroscience nurse and ethical considerations regarding the use of life sustaining treatments.
Both Igou and Savage acknowledge that although larger studies need to be done on some of these issues, families of people in a persistent vegetative state can see hope that their brain injured loved one may be far more conscious than realized.
The judge said an English court had never before been asked to consider whether lifesupporting treatment should be withdrawn from a patient who was not in a persistent vegetative state but was minimally conscious.
Is the soul of someone identified as being in a persistent vegetative state not possibly in communication with God?
Characters included a frog, a chimpanzee, a human fetus, a baby, a 5-year-old girl, a man in a persistent vegetative state, an adult woman, God, and a robot that interacts with people.
Armey complained about the Terri Schiavo imbroglio, referring to an incident last year during which Republicans passed legislation trying to force a Florida man to keep his wife hooked to a feeding tube, even though she was in a persistent vegetative state.
Starting with details about the Schiavo case, he surprisingly objectively uses case law and his personal experience to clarify some of the questions you may have before you make your most final of decisions, including what constitutes a persistent vegetative state, how doctors define consciousness, and what medical advances have done to end-of-life decisions by patients and their families.
But the father-of-one has been in a persistent vegetative state ever since, and his mother says a proper investigation has never been conducted.

Full browser ?