Articles: general-anesthesia.
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Review Case Reports
[Definitive transient monocular blindness caused by ocular compression during general anesthesia].
We present a case of irreversible monocular blindness caused by obstruction of the central retinal artery detected in a young patient without any previous history, when waking up from a surgical procedure performed under general anesthesia. Clinical and complementary investigations were not conclusive. ⋯ The fact that the patient was simultaneously submitted to a controlled low blood pressure may have worsened the effects of the compression. Reviewing the medical literature on the subject reveals that, although rare, such accidents do occur; they must be prevented by a constant surveillance when performing surgical procedures.
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Laparoscopic surgery may be associated with increased perioperative morbidity due to respiratory and cardiocirculatory problems. Preoperative assessment requires a diagnostic program including laboratory tests and noninvasive diagnostic studies, and a physical status classification. ⋯ Increased intraoperative morbidity is expected in patients with manifest cardiac failure or severely restricted pulmonary function. In patients with moderate pulmonary dysfunction laparoscopic procedures seem to be associated with the benefit of a better postoperative pulmonary function.
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General pharmacology · Nov 1992
ReviewEvaluation of the actions of general anaesthetics in the human brain.
1. General anaesthesia is a state of analgesia and impaired cognitive function that results from the depressant effects of anaesthetics. 2. Graded increases in anaesthetic concentration cause a progressive impairment of cognitive function, the extremes of which are commonly described as "light" and "deep" anaesthesia. 3. ⋯ The auditory evoked potential measures the resulting effects of anaesthetic depression and surgical stimulation which is "depth of anaesthesia". 9. However it is not yet certain whether a particular feature e.g. Nb latency, or a collection of features between 20 and 80 msec gives the most reliable index of conscious awareness.