Articles: general-anesthesia.
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General anesthesia is the most common form of anesthetic management for ambulatory surgery. Patients, in general, prefer general anesthesia because it is less anxiety provoking. During the last decade, the availability of several short-acting agents with high clearance has made general anesthetic techniques much safer and more predictable for outpatients. ⋯ The introduction of several new agents (e.g., propofol, desflurane, vecuronium, atracurium, mivacurium, rocuronium, alfentanil, ondansetron, ketorolac) has made ambulatory general anesthesia less challenging and more interesting. In the future, the new anesthetic sevoflurane, and the new opioid remifentanil, may prove useful for ambulatory anesthesia. The LMA has all but revolutionized airway management during general anesthesia for ambulatory surgery.
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Anaesthesia for fetal distress is usually indicated for emergency caesarean section. General anaesthesia, which is the classical technique in these cases, remains the leading cause of anaesthesia-related maternal mortality. Difficult intubation and Mendelson's syndrome are mostly responsible for these fatalities. ⋯ For example, a "prophylactic" epidural instituted soon after the beginning of labor may be lifesaving in a patient with obvious signs of difficult intubation. A clear definition of safe standards of equipment and practices both to prevent Mendelson's syndrome or to cope with a failed intubation through a "failed intubation drill" is of paramount importance. Finally, a comprehensive communication between anesthetic and obstetrical teams is one of the most useful ways to allow a safer approach of the management of obstetric emergencies such as caesarean section for fetal distress.
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In obstetric anaesthesia, general anaesthesia combined with endotracheal intubation, spinal anaesthesia and peridural anaesthesia is used. The main risks of general anaesthesia are: difficult intubation, aspiration of acid gastric content in non-fasting patients, depression of the fetus with narcotics and the occurrence of awareness of the mother. ⋯ The specific risks of peridural anaesthesia are: maternal hypotension, the possibility of inadvertent intravenous injection of local anaesthetics leading to cardiac and cerebral intoxication, inadvertent intrathecal application of local anaesthetics followed by total spinal block which requires reanimation and inadvertent dura perforation followed by long-lasting headache. Most anaesthesia-related maternal deaths by far occur during Caesarean section performed under general anaesthesia, but at present there is no clear evidence that the anaesthetic risk of spinal or peridural anaesthesia, on the one hand, is lower than that one of general anaesthesia, on the other.