Key result
Aortic reconstructive surgery is linked to a ~3-fold increase in respiratory abnormalities, unpredictable by oximetry.
Why the study?
The occurrence and timing of nocturnal dips in oxygen saturation after major abdominal vascular surgery and their predictability from pre-operative studies were unclear.
Does major abdominal vascular surgery increase the incidence of nocturnal dips in oxygen saturation in the late postoperative period?
Observational (n=24)
Does major abdominal vascular surgery increase the incidence of nocturnal dips in oxygen saturation in the late postoperative period?
Absolute Event Rate: 50% vs 17%
Significant nocturnal hypoxemia occurs frequently in the late postoperative period after major abdominal vascular surgery and is not reliably predicted by pre-operative overnight pulse oximetry.
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Nocturnal hypoxemia frequently complicates late recovery after aortic reconstruction and evades preoperative prediction; leaves open optimal monitoring strategies for prospective trials.
REEDER et al. (1992) conducted an observational in Aortic reconstructive surgery (n=24). Aortic reconstructive surgery vs. Pre-operative baseline was evaluated on Significant abnormality of respiration (≥5 dips in oxygen saturation >4% per hour). Following aortic reconstructive surgery, significant respiratory abnormalities occurred in 50% of patients postoperatively versus 17% pre-operatively, which pre-operative oximetry failed to predict.
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