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Signa Vitae

Journal of Intensive Care and Emergency Medicine

Haemodynamic monitors in laparoscopy

Abstract

Laparoscopic procedures are often performed on high risk surgical patients that could benefit from close haemodynamic monitoring and goal directed fluid therapy. Pneumoperitoneum has been shown to influence haemodynamic variables and alter arterial pressure waveform upon which many minimally invasive haemodynamic monitors rely. There are a few individual studies verifying various less invasive haemodynamic devices. With the possible exception of oesophageal Doppler, their measurements under pneumoperitoneum conditions are less reliable. Besides modifying reliability of monitors, pneumoperitoneum possibly also exerts independent influence on haemodynamic variables, such as lowering predictive value of pulse pressure variation for fluid responsiveness.

KEYWORDS: pneumoperitoneum, laparoscopy, haemodynamic monitoring

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Current concepts in fluid therapy and non-invasive haemodynamic monitoring

Abstract

Advantages of goal directed therapy (GDT) have recently become more and more difficult to prove in the face of newly implemented protocolised patient care approaches that also clearly improve patient outcome. However, individualised approach using GDT has been suggested to be superior to protocolised care and large meta-analyses still consistently show beneficial effects of GDT. Concerns of invasiveness were the reason why some patients’ haemodynamics was not measured and in turn were not included in any GDT protocols. Recently, non-invasive devices to measure arterial blood pressure and haemodynamic variables emerged, and although they are very appealing and easy to use, they require further validation both by comparison to more invasive methods and by outcome trials.

Keywords: Haemodynamic monitoring, non-invasive haemodynamic monitoring, goal-directed therapy, fluid therapy, validation

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