• Kruger GH, Shanks A, Kheterpal S, Tremper T, Chiang CJ, Freundlich RE, Blum JM, Shih AJ, Tremper KK. Influence of non-invasive blood pressure measurement intervals on the occurrence of intra-operative hypotension. Journal of clinical monitoring and computing. 2017 Sep 30. PMID: 28965158 [PubMed].


The American Society of Anesthesiologists Standards for Basic Monitoring recommends blood pressure (BP) measurement every 5 min. Research has shown distractions or technical factors can cause prolonged measurement intervals exceeding 5 min. We investigated the relationship between prolonged non-invasive BP (NIBP) measurement interval and the incidence of hypotension, detected post-interval. Our secondary outcome was to determine independent predictors of these prolonged NIBP measurement intervals. Retrospective data were analyzed from 139,509 general anesthesia cases from our institution's Anesthesia Information Management System (AIMS). Absolute hypotension (AH) was defined a priori as a systolic BP  6 min OR 4.0 / 3.6; AH/RH > 10 min OR 4.3 / 3.9; p  10-minute AH model" indicated that age 41-80, increased co-morbidity profile, obesity and turning (repositioning) of the operative room table were significant predictors of prolonged NIBP measurement intervals (p