Continuously monitored vital signs for detection of myocardial injury in high-risk patients – An observational study

Frederik C. Loft*, Søren M. Rasmussen, Mikkel Elvekjaer, Camilla Haahr-Raunkjaer, Helge B. D. Sørensen, Eske K. Aasvang, Christian S. Meyhoff, WARD-Project Group

*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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Abstract

Background: Patients are at risk of myocardial injury after major non-cardiac surgery and during acute illness. Myocardial injury is associated with mortality, but often asymptomatic and currently detected through intermittent cardiac biomarker screening. This delays diagnosis, where vital signs deviations may serve as a proxy for early signs of myocardial injury. This study aimed to assess the association between continuous monitored vital sign deviations and subsequent myocardial injury following major abdominal cancer surgery and during acute exacerbation of chronic obstructive pulmonary disease. Methods: Patients undergoing major abdominal cancer surgery or admitted with acute exacerbation of chronic obstructive pulmonary disease had daily troponin measurements. Continuous wireless monitoring of several vital signs was performed for up to 96 h after admission or surgery. The primary exposure was cumulative duration of peripheral oxygen saturation (SpO2) below 85% in the 24 h before the primary outcome of myocardial injury, defined as a new onset ischaemic troponin elevation assessed daily. If no myocardial injury occurred, the primary exposure was based on the first 24 h of measurement. Results: A total of 662 patients were continuously monitored and 113 (17%) had a myocardial injury. Cumulative duration of SpO2 < 85% was significantly associated with myocardial injury (mean difference 14.2 min [95% confidence interval −4.7 to 33.1 min]; p =.005). Durations of hypoxaemia (SpO2 < 88% and SpO2 < 80%), tachycardia (HR > 110 bpm and HR > 130 bpm) and tachypnoea (RR > 24 min−1 and RR > 30 min−1) were also significantly associated with myocardial injury (p <.04, for all). Conclusion: Duration of severely low SpO2 detected by continuous wireless monitoring is significantly associated with myocardial injury in high-risk patients admitted to hospital wards. The effect of early detection and interventions should be assessed next.

OriginalsprogEngelsk
TidsskriftActa Anaesthesiologica Scandinavica
Vol/bind66
Udgave nummer6
Sider (fra-til)674-683
Antal sider10
ISSN0001-5172
DOI
StatusUdgivet - 2022

Bibliografisk note

Funding Information:
The WARD‐project has received grants from the Innovation Fund Denmark, the Novo Nordic Foundation, the Danish Cancer Society, Steno Diabetes Center Denmark, Copenhagen Center for Health Technology, Radiometer, A.P. Møller Foundation as well as internal institutional funding. CSM also reports direct and indirect research funding from Ferring Pharmaceuticals, Merck, Sharp & Dohme Corp. and Boehringer Ingelheim outside the submitted work as well as lecture fees from Radiometer. EKA also reports institutional research funding from Norpharma A/S outside the submitted work as well as lecture fees from Radiometer. ME: Received departmental funding from Merck, Sharp & Dohme Corp outside the submitted work. SMR, CHR and FCL: None.

Publisher Copyright:
© 2022 The Authors. Acta Anaesthesiologica Scandinavica published by John Wiley & Sons Ltd on behalf of Acta Anaesthesiologica Scandinavica Foundation.

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