This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.
The apparatus for the estimation of blood-pressure which I desire to present has the following features to recommend it:
Extreme simplicity; the avoidance of all ground joints, cocks, valves and complicated mechanisms.
Absence of metal parts to amalgamate the mercury.
Ease of manipulation; only one hand being required to work the apparatus, the other being free to feel the pulse or manipulate the stethoscope in auscultation.
Cheapness; there being no expensive parts or construction, this apparatus can be sold for one-half the price of the cheapest instrument at present on the market.
Portability; it may be taken apart readily, carried in any convenient bag and quickly put together again for use. The entire apparatus weighs fourteen ounces.
This apparatus consists of:
1. Wooden base with supports for small glass mercury cistern and for upright 300 mm. scale graduated in millimeters. Lying in a groove in this
KERCHER DE. A NEW APPARATUS FOR THE ESTIMATION OF BLOOD-PRESSURE. JAMA. 1910;LIV(14):1136. doi:10.1001/jama.1910.92550400001001g