Abstract
We have designed and constructed a ruler (“Torrstick”) calibrated in millimeters of mercury for the measurement of hydrostatic pressure differences. Marks are placed on a measuring stick every 1.34 cm, to afford the best compromise between a column of 0.9% saline solution and a column of blood. Several uses for this ruler are proposed, including the measurement of central venous pressure.
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Block, F.E., Schulte, G.T., Morris, T. et al. The “Torrstick”: A ruler calibrated in millimeters of mercury for measurement of hydrostatic pressure. J Clin Monitor Comput 8, 136–138 (1992). https://doi.org/10.1007/BF01617433
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DOI: https://doi.org/10.1007/BF01617433