Thus It is usually aplied however, to reduce individual's sensation of a pain to enable surgery to be performed. This is effected by administering drugs or by the use of other methods such as ACUPUNCTURE or HYPNOSIS.
GENERAL ANAESTHESIA: Is the total unconsciousness, usually achieved by administering a combination of injections and gases.
LOCAL ANAESTHESIA: This abolishes pain in a limited area of the body and is used for minor operations, particularly in many dental procedures. It may be achieved by injections of substances such as LIDOCAINE close to a local nerve, which deadens the tissues supplied by that nerve.
Local anaesthesia can be combined with intravenous sedation. An appropriate injection into the spinal column produces spinal anaesthesia or Epidural anaesthesia in the lower limbs or abdomen.
SPINAL ANAESTHESIA: Suppression of sensation, usually inthe lower part of the body, by injection of a local anaesthetics in to the subarachnoid space subarachnoid space is the space between the arachnoid and pia meninges of the brain and spinal cord, containing circulating cerebrospinal fluid and large blood vessels.
A very fine needle is used to reduce the amount of cerebrospinal fluid that escapes as the needle penetrates the dura. The injection site for spinal anaesthetic is most often in the lumbar region of the vertebral column. The extent of the area anaesthetised depends upon the amount and strength of local anethetic injected.
REGIONAL ANAESTHESIA: Is achieved by encircling local anaesthetic solutions or direct application of anaesthetic to one or more peripheral nerves.
ANAESTHETIC
It is an agent that abolishes sensation affecting either the whole body General Anaesthetic or a region Local Anaesthetic
General anaesthetics are used for surgical procedures, depressing the activity of the central nervouse system resulting to loss of consciousness. Anaesthesia is induced by short-acting barbiturate such as thiopental and is maintained by inhalation anaesthetics such as halothane.Halothane is a potent general anaethetic administered by inhalation, used for inducing and maintaining anaesthesia in all types of surgical operations.LOCAL ANAESTHETICS inhibits conduction of impulses in sensory nerves in the region where they are injected; they includes Tetracaine, Bupivacaine and Lidocaine..
Dilute local anaesthetic solutions are used when the sensory nerves are targeted rather than the motor nerves
