acute confusional state


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acute confusional state (ACS)

a form of delirium caused by interference with the metabolic or other biochemical processes essential for normal brain functioning. Symptoms may include disturbances in cognition and levels of awareness, short-term memory deficit, retrograde and anterograde amnesia, and disturbances in orientation, accompanied by restlessness, apprehension, irritability, and apathy. The condition may be associated with an acute physiological state, delirium, toxic psychosis, or acute brain syndrome which constitutes a medical emergency.

Acute Confusional State

A state of severe confusion or an abrupt change in mental status, due to either psychiatric or organic disease.
Clinical findings Lethargy, agitation, confusion, disorientation, delirium.

acute confusional state

Acute brain syndrome Neurology A state of severe confusion or an abrupt change in mental status, due either to psychiatric or organic disease Clinical Lethargy, agitation, confusion, disorientation, delirium. Cf Dementia.
References in periodicals archive ?
Of these events, the most frequent were seizure disorders, cerebrovascular disease, mononeuropathy, acute confusional states, cranial neuropathy, myelopathy, polyneuropathy, aseptic meningitis, mood disorders, and psychosis, with each of the remaining syndromes affecting no more than 2% of patients.
inflammatory mediated injury, in which increased permeability of the blood-brain barrier, formation of immune complexes, and production of IFN-[alpha] and other inflammatory mediators leads to diffuse NP manifestations, such as psychosis and acute confusional states.
Acute confusional states and dementia in the elderly: The role of dehydration/volume depletion.
Acute confusional states are precipitated by a disruption in neurotransmission often associated with medications, especially drugs with anticholinergic effects, or altered cerebral metabolism.
Gustafson Y, Berggren D, Brannstrom B, Bucht G, Norberg A, Hansson L, Winblad B: Acute confusional states in elderly patients treated for femoral neck fracture J Amer Geriatr Soc 1988; 36:525-530.
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