Pharmacy Study Material

Free pharmacy material General Anaesthetics INTRODUCTION— ANAESTHESIA AND ITS STAGES General anaesthetics are CNS depressants that produce anaesthesia, which extends to the entire body, and are characterized by a state of unconsciousness, analgesia, and amnesia with skeletal muscle relaxation and loss of reflexes. General anaesthetics are employed for surgical operations, and four stages of anaesthesia may be recognized as: Stage I (Analgesia): The patient is conscious and experiences sensations of warmth, remoteness, drifting, falling, and giddiness. There is a marked reduction in the perception of painful stimuli. This stage is used often in obstetrics and minor surgery. Stage II (Delirium): This stage begins with the loss of consciousness. Depression of higher centres produces a variety of effects including excitement, involuntary activity, and increased skeletal muscle tone and respiration. Stage III (Surgical anaesthesia): This is the stage of unconsciousness...