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Open Access 01-08-2010 | Research

Haemodynamic optimisation improves tissue microvascular flow and oxygenation after major surgery: a randomised controlled trial

Authors: Shaman Jhanji, Amanda Vivian-Smith, Susana Lucena-Amaro, David Watson, Charles J Hinds, Rupert M Pearse

Published in: Critical Care | Issue 4/2010

Abstract

Introduction

Post-operative outcomes may be improved by the use of flow related end-points for intra-venous fluid and/or low dose inotropic therapy. The mechanisms underlying this benefit remain uncertain. The objective of this study was to assess the effects of stroke volume guided intra-venous fluid and low dose dopexamine on tissue microvascular flow and oxygenation and inflammatory markers in patients undergoing major gastrointestinal surgery.

Methods

Randomised, controlled, single blind study of patients admitted to a university hospital critical care unit following major gastrointestinal surgery. For eight hours after surgery, intra-venous fluid therapy was guided by measurements of central venous pressure (CVP group), or stroke volume (SV group). In a third group stroke volume guided fluid therapy was combined with dopexamine (0.5 mcg/kg/min) (SV & DPX group).

Results

135 patients were recruited (n = 45 per group). In the SV & DPX group, increased global oxygen delivery was associated with improved sublingual (P < 0.05) and cutaneous microvascular flow (P < 0.005) (sublingual microscopy and laser Doppler flowmetry). Microvascular flow remained constant in the SV group but deteriorated in the CVP group (P < 0.05). Cutaneous tissue oxygen partial pressure (PtO₂) (Clark electrode) improved only in the SV & DPX group (P < 0.001). There were no differences in serum inflammatory markers. There were no differences in overall complication rates between the groups although acute kidney injury was more frequent in the CVP group (CVP group ten patients (22%); pooled SV and SV & DPX groups seven patients (8%); P = 0.03) (post hoc analysis).

Conclusions

Stroke volume guided fluid and low dose inotropic therapy was associated with improved global oxygen delivery, microvascular flow and tissue oxygenation but no differences in the inflammatory response to surgery. These observations may explain improved clinical outcomes associated with this treatment in previous trials.

Trial registration number

ISRCTN 94850719

Available only for authorised users

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Title: Haemodynamic optimisation improves tissue microvascular flow and oxygenation after major surgery: a randomised controlled trial
Authors: Shaman Jhanji
Amanda Vivian-Smith
Susana Lucena-Amaro
David Watson
Charles J Hinds
Rupert M Pearse
Publication date: 01-08-2010
Publisher: BioMed Central
Published in: Critical Care / Issue 4/2010
Electronic ISSN: 1364-8535
DOI: https://doi.org/10.1186/cc9220

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Haemodynamic optimisation improves tissue microvascular flow and oxygenation after major surgery: a randomised controlled trial

Abstract

Introduction

Methods

Results

Conclusions

Trial registration number

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Introduction

Methods

Results

Conclusions

Trial registration number

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