Abstract
Direct measurement of vascular pressure requires the insertion of a cannula into a
vessel. The cannula is connected to saline filled tubing attached to a transducer
apparatus for measurement and display of the vascular pressure waveform. The transducer
apparatus is essentially the same for all intravascular pressure measurement. Direct
measurement of arterial pressure is indicated where rapid fluctuations in pressure
are anticipated, where accurate control of pressure is required, and for repeated
sampling of blood gases. Central venous pressure (CVP) and pulmonary capillary wedge
pressure (PCWP) measurement indicate the preload of the right and left side of the
heart respectively; and when considered in conjunction with other physiological measures
can give a guide to the volume status of a patient. Trends in response to therapeutic
intervention should be used rather than any individual value being used in isolation.
Direct measurement of vascular pressure involves invasive procedures which carry a
risk of complications relating to insertion of the cannulae and duration of use.
Keywords
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References
- Clinical review: complications and risk factors of peripheral arterial catheters used for haemodynamic monitoring in anaesthesia and intensive care medicine.Crit Care. 2002; 6: 199-204
- Preventing complications of central venous catheterization.N Engl J Med. 2003; 348: 1123-1133
- Complications associated with pulmonary artery catheters: a comprehensive clinical review.Scand J Surg. 2009; 98: 199-208
Article Info
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Copyright
© 2011 Elsevier Ltd. Published by Elsevier Inc. All rights reserved.
