. The clinical study of blood-pressure : a guide to the use of the sphygmomanometer in medical, surgical, and obstetrical practice, with a summary of the experimental and clinical facts relating to the blood-pressure in health and in disease . hollow rubber tube coveredwith silk, of 4^ cm. diameter. It is provided with a specialclamp for fastening in place on the arm. Near its closed endis inserted a small tube (D) leading to the manometer. C C. The inflating apparatus is a Richardson double bulb,such as used for a thermo-cautery. Special Technique.—The armlet is placed about the armand the op
. The clinical study of blood-pressure : a guide to the use of the sphygmomanometer in medical, surgical, and obstetrical practice, with a summary of the experimental and clinical facts relating to the blood-pressure in health and in disease . hollow rubber tube coveredwith silk, of 4^ cm. diameter. It is provided with a specialclamp for fastening in place on the arm. Near its closed endis inserted a small tube (D) leading to the manometer. C C. The inflating apparatus is a Richardson double bulb,such as used for a thermo-cautery. Special Technique.—The armlet is placed about the armand the open end secured firmly in the clamp. The pressureis best raised by means of the terminal bulb (C) until the pulse Riva-Rooci. Gaz. Med. di Torino, 1896, Nos. 51, 52. MEASURING SYSTOLIC PRESSURE 79 has nearly disappeared, then the final gradual compression andrelease regulated from the distended second bulb (C). Thisrequires some practice and, for high pressure, a little strength,but it saves enough time to be worth acquiring. If not pos-sible, then the slow lowering of pressure must be accomplishedwith the screw-valve (E). Advantages.—It is the original instrument. The ma-nometer stands firmly and the scale is easily read. It is not. ( Fig. 21.—lil\A-KoOOls SPI!Y(: easily broken. The armlet can be neatly adjusted. Thedouble bulb inflation re(iuires no special knack. Defects.—The manometer is not easily portable. Thearmlet possesses the fatal defect of too small width (sec page57). The double bulb as an inflator consumes an unnecessaryamount of time and is not very durable. The C(_)nnecting tubesare of distensible rubber. Makers.—Zambelli & Co., Turin, Italy. Cost.—In Germany, 45 marks. Can be obtained in theUnited States only bj importation. 80 THE MODERN SPHYGMOMANOMETERS d. Martins* Modification with Gumprechts Manometer.—This substitutes a manometer with glass cistern of larger capacity,in order to make the zero point accurate; also a 10 cm. armlet
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbloodpr, bookyear1904
