Nowadays injection of short-acting barbiturates, such as sodium penthothal, is frequently used to induce anesthesia rapidly; inhaled agents, including halothane, ether, nitrous oxide, trichloroethylene, and cyclopropane, are used for induction and maintenance. Local and regional anesthesia are the reversible blocking of pain impulses by chemical action of cocaine derivatives (e.g., procaine, lignocaine). Nerve trunks are blocked for minor surgery and dentistry, and more widespread anesthesia may be achieved by blocking spinal nerve roots, useful in obstetrics and patients unfit for general anesthesia. Pathological anesthesia describes loss of sensation following trauma or disease.
Epidural anesthesiaEpidural anesthesia involves the injection of a local anesthetic into the epidural space surrounding the spinal cord. It is done to anesthetize the spinal nerve roots and so prevent pain during surgery or childbirth.
Related category• HEALTH AND DISEASE
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