Automatic algorithm for monitoring systolic pressure variation and difference in pulse pressure

Pestel, Gunther; Fukui, Kimiko; Hartwich, Volker; Schumacher, Peter M; Vogt, Andreas; Hiltebrand, Luzius B; Kurz, Andrea; Fujita, Yoshihisa; Inderbitzin, Daniel; Leibundgut, Daniel (2009). Automatic algorithm for monitoring systolic pressure variation and difference in pulse pressure. Anesthesia and analgesia, 108(6), pp. 1823-9. Hagerstown, Md.: Lippincott Williams & Wilkins 10.1213/ane.0b013e3181a2a8bf

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BACKGROUND: Difference in pulse pressure (dPP) reliably predicts fluid responsiveness in patients. We have developed a respiratory variation (RV) monitoring device (RV monitor), which continuously records both airway pressure and arterial blood pressure (ABP). We compared the RV monitor measurements with manual dPP measurements. METHODS: ABP and airway pressure (PAW) from 24 patients were recorded. Data were fed to the RV monitor to calculate dPP and systolic pressure variation in two different ways: (a) considering both ABP and PAW (RV algorithm) and (b) ABP only (RV(slim) algorithm). Additionally, ABP and PAW were recorded intraoperatively in 10-min intervals for later calculation of dPP by manual assessment. Interobserver variability was determined. Manual dPP assessments were used for comparison with automated measurements. To estimate the importance of the PAW signal, RV(slim) measurements were compared with RV measurements. RESULTS: For the 24 patients, 174 measurements (6-10 per patient) were recorded. Six observers assessed dPP manually in the first 8 patients (10-min interval, 53 measurements); no interobserver variability occurred using a computer-assisted method. Bland-Altman analysis showed acceptable bias and limits of agreement of the 2 automated methods compared with the manual method (RV: -0.33% +/- 8.72% and RV(slim): -1.74% +/- 7.97%). The difference between RV measurements and RV(slim) measurements is small (bias -1.05%, limits of agreement 5.67%). CONCLUSIONS: Measurements of the automated device are comparable with measurements obtained by human observers, who use a computer-assisted method. The importance of the PAW signal is questionable.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > Department of Intensive Care, Emergency Medicine and Anaesthesiology (DINA) > Clinic and Policlinic for Anaesthesiology and Pain Therapy 04 Faculty of Medicine > Department of Gastro-intestinal, Liver and Lung Disorders (DMLL) > Clinic of Visceral Surgery and Medicine > Visceral Surgery
UniBE Contributor:	Fukui, Kimiko, Vogt, Andreas, Hiltebrand, Luzius, Inderbitzin, Daniel
ISSN:	0003-2999
Publisher:	Lippincott Williams & Wilkins
Language:	English
Submitter:	Jeannie Wurz
Date Deposited:	04 Oct 2013 15:11
Last Modified:	05 Dec 2022 14:21
Publisher DOI:	10.1213/ane.0b013e3181a2a8bf
PubMed ID:	19448207
Web of Science ID:	000266285500017
URI:	https://boris.unibe.ch/id/eprint/31256 (FactScience: 195685)