What are the types of anaesthesia under which surgeries can be conducted ?

Answer 1

Local anaesthesia, giving injections to numb the area of operation.
Regional anaesthesia, eg. - spinal and epidural, by which the entire lower part of body becomes immobile and painless; patient will be conscious.
General anaesthesia, in which patient will be fully unconscious.

Answer 2

there is general anaesthesia which makes the patient loss conciousness , and there is spinal anaesthesia which is given at the lumbar area and patient can't feel this lower half, and there is also local anaesthia at one part of the body

Answer 3

There are several forms of anesthesia:

General: anesthesia resulting in amnesia, with a loss of protective airway reflexes. While usually administered with inhalational agents, general anesthesia can be achieved with intravenous agents, such as propofol. Amnesia is the main characteristic, while analgesia and muscle relaxation may be present, to varying degrees.
Regional: Loss of pain sensation, with varying degrees of muscle relaxation, in certain regions of the body. Administered with local anesthesia to peripheral nerve bundles, such as the brachial plexus in the neck. Examples include the interscalene block for shoulder surgery, axillary block for wrist surgery, and femoral nerve block for leg surgery. While traditionally administered as a single injection, newer techniques involve placement of indwelling catheters for continuous or intermittent administration of local anesthetics.
Spinal: aka "Sub Arachnoid Block" Refers to a regional block resulting from a small volume of local anesthetics being injected into the spinal canal. The spinal canal is covered by the dura mater, through which the spinal needle enters. The spinal canal contains cerebrospinal fluid and the spinal cord. The sub arachnoid block is usually injected between the 4th and 5th lumbar vertebrae, because the spinal cord usually stops at the 1st lumbar vertebra, while the canal continues to the sacral vertebrae. It results in a loss of pain sensation and muscle strength, usually up to the level of the chest (nipple line or 4th thoracic dermatome).
Epidural: Regional block resulting from an injection of a large volume of local anesthetic into the epidural space. The epidural space is a potential space that lies underneath the ligamenta flava, and outside the dura mater(outside layer of the spinal canal). This is basically an injection around the spinal canal.
Local anesthesia is similar to regional anesthesia, but exerts its effect on a smaller area of the body.
Not all surgical procedures require anesthetic. Sometimes no anesthetic is required, and conscious sedation is used, which does not result in loss of consciousness or significant analgesia, but frequently produces a degree of amnesia, and relaxes the patient.

According to a 1999 report from the Institute of Medicine, anesthesia care today is nearly 50 times safer than it was 20 years ago.

Answer 4

General and local.