Why the study?
Does cardiopulmonary bypass surgery cause postoperative cognitive impairment in patients?
Does cardiopulmonary bypass surgery cause postoperative cognitive impairment in patients?
The study highlights the presence of preoperative memory impairments and new postoperative attention impairments in CPB patients, emphasizing the importance of appropriate statistical methods in assessing cognitive decline.
Answers are grounded in this paper and cite their sources.
Preoperative cognitive assessment is warranted in CPB candidates; observational data leaves open whether bypass causes attention decline.
Cognitive decline after cardiopulmonary bypass (CPB) surgery has been a concern since the advent of CPB procedures. A primary focus of many studies on this topic has been to quantify the incidence of post-CPB cognitive impairment. However, studies that have used traditional parametric statistics have generally failed to confirm that long-lasting (> or = 1 month) cognitive declines occur reliably after CPB surgery. For the present study, the authors used a split-plot analysis of variance model that revealed preoperative memory impairments in the CPB patients and new postoperative impairments of attention. The authors discuss the assumptions of, and problems associated with, analysis methods that are often used to quantify the incidence of cognitive impairment following CPB surgery.
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Keith et al. (2002) studied this question.
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