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Postanesthetic shivering is one of the leading causes of discomfort in patients recovering from general anesthesia. It usually results due to the anesthetic inhibiting the body's thermoregulatory capability, although cutaneous vasodilation (triggered by post-operative pain) may also be a causative factor.
General anaesthesia reduces the tonic contraction of the orbicularis oculi muscle, causing lagophthalmos i.e. the eyelids do not close fully in 59% of patients. [3]In addition, general anaesthesia reduces tear production and tear-film stability, resulting in corneal epithelial drying and reduced lysosomal protection.
General anesthesia is usually considered safe; however, there are reported cases of patients with distortion of taste and/or smell due to local anesthetics, stroke, nerve damage, or as a side effect of general anesthesia. [46] [47] At the end of surgery, administration of anaesthetic agents is discontinued.
Postoperative nausea and vomiting (PONV) is the phenomenon of nausea, vomiting, or retching experienced by a patient in the post-anesthesia care unit (PACU) or within 24 hours following a surgical procedure. PONV affects about 10% of the population undergoing general anaesthesia each year. PONV can be unpleasant and lead to a delay in ...
Although complications during anesthesia are rare, potentially life-threatening consequences may occur if an anaphylactic reaction develops. The severity of the reaction whilst under anesthesia is because the anesthetist is only made aware of the allergy when it is severe enough to compromise the cardiovascular system and the respiratory system.
POCD is just as likely to occur after operations under regional anesthesia as under general anesthesia. [2] [4] More likely after major operations than minor operations. [9] [11] More likely after heart operations than other types of surgery. [9] [11] More likely in aged than in younger patients. [9] [11] More likely in older patients with high ...
Amnesia is desirable during surgery, so general anaesthesia procedures are designed to induce it for the duration of the operation. Sedatives such as benzodiazepines, which are commonly used for anxiety disorders, can reduce the encoding of new memories, particularly in high doses (for example, prior to surgery in order for a person not to recall the surgery). [2]
Halothane, an agent introduced in the 1950s, has been almost completely replaced in modern anesthesia practice by newer agents because of its shortcomings. [10] Partly because of its side effects, enflurane never gained widespread popularity. [10] In theory, any inhaled anesthetic agent can be used for induction of general anesthesia.