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To the Editor.—
In his answer to a reader's question on central venous hyperalimentation catheterization (1981;247:521), Dr R. M. Vazquez has pointed out ways and means of decreasing catheter-induced sepsis. We would like to bring to the attention of readers that it is possible to measure central venous pressure (CVP) using hyperalimentation catheters without the use of a water manometer, thus maintaining the integrity and sterility of the system. The method entails simply disconnecting the intravenous (IV) tubing from the infusion pump and opening up the stopcock to facilitate rapid infusion of the solution. The bottle is then lowered slowly until the solution stops dripping. The distance between the midaxillary line of the patient (which usually corresponds to the level of the right atrium) and the meniscus of the fluid in the drip chamber represents the CVP. To be more accurate, the bottle may be lowered even further, and then
Sriram K. Measuring Central Venous Pressure Through Hyperalimentation Catheters. JAMA. 1982;248(7):830. doi:10.1001/jama.1982.03330070018014