Persistent vegetative state

Persistent vegetative state (PVS) was first proposed by Jennett and Plum in 1972, which means that after a period of severe brain damage, people still lack conscious activity and lose language, but only retain unconscious attitude adjustment and motor functions. status. Vegetative state refers to the living state in which the body can survive and develop, but is unconscious and thinking, and lacks the ability to perceive itself and its surrounding environment. The patient has a sleep-wake cycle, which partially or fully preserves hypothalamus and brainstem functions, but lacks any adaptive responses and lacks any functional thinking that accepts and reflects information. The plant state can be temporary or persistent plant state (PVS). Some people think that the state of plants is more than one month, or one year is called PVS, but it is generally believed that one year is required to diagnose PVS. Persistent vegetative state (PVS) is similar to coma and is easily confused with coma. Moreover, patients who are initially comatose can gradually develop into these states after varying lengths of time. Once the patient has a sleep-wake cycle, the actual coma no longer exists. The distinction between persistent vegetative state (PVS) and true coma is important for proper treatment and prognosis.

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