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a glass tube inserted into an artery at right angles to its axis, the pressure being shown by the height to which the blood ascends in the tube.
Farlex Partner Medical Dictionary © Farlex 2012
Hales,Stephen, English physiologist, 1677-1761.
Hales piesimeter - a glass tube inserted into an artery at right angles to its axis to measure pressure.
Medical Eponyms © Farlex 2012