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Perioperative risk assessment - focus on functional capacity.

PMID: 33935179 (view PubMed database entry)
DOI: 10.1097/aco.0000000000000988 (read at publisher's website )

Ciara Hanley, Duminda N Wijeysundera,

<h4>Purpose of review</h4>This review examines how functional capacity informs preoperative risk stratification, as well as strengths and limitations of options for estimating functional capacity.<h4>Recent findings</h4>Functional capacity (or cardiopulmonary fitness) overlaps with other important characteristics, including muscular strength, balance, and frailty. Poor functional capacity is associated with postoperative morbidity, especially noncardiovascular complications. Both patient interviews and exercise tests are used to assess functional capacity. The usual approach of an unstructured patient interview does not predict outcomes. Structured interviews that incorporate validated questionnaires (Duke Activity Status Index) or standardized questions about physical activity (ability to climb stairs) do predict moderate-or-severe complications and cardiovascular complications. Among exercise tests, cardiopulmonary exercise testing (CPET) has shown the most consistent association with risks of complications. Other tests (6-min walk test, incremental shuttle walk test, stair climbing) might predict complications, but still require further high-quality evaluation.<h4>Summary</h4>A straightforward way to better assess functional capacity is a structured interview with validated questionnaires or standardized questions about physical activities. Functional capacity can also be assessed by exercise tests, with the strongest evidence supporting CPET. Although some simpler exercise tests have shown promise, more research remains needed to better define their role in preoperative evaluation.

Curr Opin Anaesthesiol (Current opinion in anaesthesiology)
[2021, 34(3):309-316]

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