دورية أكاديمية
Mean systemic filling pressure and venous return to assess the effects of passive leg raising and volume expansion in acute circulatory failure patients: a posthoc analysis of a multi-centre prospective study.
العنوان: | Mean systemic filling pressure and venous return to assess the effects of passive leg raising and volume expansion in acute circulatory failure patients: a posthoc analysis of a multi-centre prospective study. |
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المؤلفون: | Mallat, Jihad1,2,3,4 (AUTHOR) mallatjihad@gmail.com, Abou-Arab, Osama5 (AUTHOR), Lemyze, Malcolm1 (AUTHOR), Fischer, Marc-Olivier6 (AUTHOR), Guinot, Pierre-Grégoire7 (AUTHOR) |
المصدر: | Anaesthesia Critical Care & Pain Medicine. Feb2024, Vol. 43 Issue 1, pN.PAG-N.PAG. 1p. |
مصطلحات موضوعية: | *VENOUS pressure, *CENTRAL venous pressure, *LONGITUDINAL method, *CIRCULATION models, *PHYSIOLOGICAL models |
مستخلص: | The main aim of the study was to investigate the behaviours of the mean systemic filling pressure (P msf), calculated by the mathematical method, and its derived variables of venous return after volume expansion (VE) and passive leg raising (PLR), with analysis according to fluid and PLR responsiveness. This was a post-hoc analysis of a multicentre prospective study. We included 202 mechanically ventilated patients with acute circulatory failure. P msf , dVR (difference between P msf and central venous pressure [CVP]), and resistance to venous return (RVR) were calculated before/after PLR and before/after VE. Fluid- and PLR-responsiveness were defined according to the increase in cardiac index (CI) >15% after VE and >10% after PLR, respectively. P msf increased significantly after VE and PLR in both fluid and PLR-responder and non-responder groups. In fluid-responder patients, the increase in dVR was significantly higher than in non-responder group (1.5 [IQR:1.0−2.0] vs. 0.3 [IQR:-0.1−0.6] mmHg, p < 0.001) because of the larger increase in CVP relative to P msf in the non-responder group. The same findings were observed after PLR. RVR significantly decreased only in the fluid-responder and PLR-responder groups after VE and PLR. Venous return, derived from the mathematical model, increased in preload-dependent patients after VE and PLR because of the larger increases in P msf relative to CVP and the decreases in RVR. In preload-independent patients, VR did not change because of the larger rise in CVP compared to P msf after VE and PLR. These findings agree with the physiological model of circulation described by Guyton. [ABSTRACT FROM AUTHOR] |
قاعدة البيانات: | Academic Search Index |
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