Transient stop-flow arm arterial-venous equilibrium pressure measurement: determination of precision of the technique

Journal of Clinical Monitoring and Computing
Hollmann D AyaMaurizio Cecconi

Abstract

Transient stop-flow arm arterial-venous equilibrium pressure (Pmsf-arm) is a validated technique for measuring the mean systemic filling pressure (Pmsf). Pmsf is a functional measure of the effective intravascular volume status. This study aims to assess the precision of the Pmsf-arm measurement. Pmsf-arm was measured by inflating a pneumatic tourniquet around the upper arm 50 mmHg above systolic pressure for 60 s, four times consecutively, with an interval of 5 min. Arterial (Pa) and venous pressure (Pv) were recorded every 10 s. Pa-Pv difference was calculated to determine the stop-flow time. The coefficient error (CE) was determined and used to derive the least significant change (LSC) in Pmsf-arm that this technique could reliably detect. The rANOVA test was used to compare repeated measurements of the four determinations of Pmsf-arm. 80 measurements of Pmsf-arm were studied in 20 patients. Pa and Pv equalised after 60 s of inflation (Pa-Pv difference 0 ± 0.01 mmHg). There were no significant differences of Pmsf-arm values among determinations. For a single measurement, the CE was 5 % (±2 %) and the LSC was 14 % (±5 %). Averaging two, three and four measurements the CE improves to 4 % (±1 %), 3 % (±1 %) and 3 % (±1 %) respe...Continue Reading

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Citations

Jan 22, 2017·The Journal of Thoracic and Cardiovascular Surgery·Satoshi MasutaniHideaki Senzaki
Mar 22, 2018·Critical Care : the Official Journal of the Critical Care Forum·Victoria A BennettMaurizio Cecconi
Jan 17, 2019·Acta Anaesthesiologica Scandinavica·Konstantin YastrebovEvgeniy Polovnikov
Aug 5, 2017·Critical Care : the Official Journal of the Critical Care Forum·Laura ToscaniMaurizio Cecconi
Mar 1, 2019·Journal of Applied Physiology·Per Werner-MollerDavid Berger

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