Effects on left ventricular performance of changes in cardiac loading conditions depend on 'relative load'

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Why the study?

Does the Trendelenburg position increase preload volume in hypovolemic post-operative patients?

Structured PICO

Does the Trendelenburg position increase preload volume in hypovolemic post-operative patients?

Population

Hypovolemic patients post-operation in intensive care with closed chests

Intervention

Trendelenburg position (head down-tilt position of 30°)

Outcome

Intrathoracic blood volume index (preload volume)surrogate

Patients were not instrumented with left ventricular conductance catheters
Needs further analysis using a greater number of patients
Needs differentiation between solitary leg elevation and tilting the whole patient head down

No takes yet. Share an insight, caveat, or question.

The Trendelenburg position may not effectively increase preload volume via autotransfusion in hypovolemic post-operative patients.

Reuter et al. (2004) studied this question.

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