title: The "Torrstick": a ruler calibrated in millimeters of mercury for measurement of hydrostatic pressure.
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.
authors.affiliation: Department of Anesthesiology, Ohio State University, School of Medicine, Columbus 43210.
authors.forename: F E
authors.initials: FE
authors.lastname: Block
authors.forename: G T
authors.initials: GT
authors.lastname: Schulte
authors.forename: T
authors.initials: T
authors.lastname: Morris
authors.forename: M
authors.initials: M
authors.lastname: Ramsey
mesh_terms: D001795:Blood Pressure Determination / Q000295:instrumentation*; D002138:Calibration; D004867:Equipment Design; D006801:Humans; D006874:Hydrostatic Pressure; D008628:Mercury; D014160:Transducers, Pressure
chemical_list: D008628:Mercury