Human physiology (1913) (14799960693)

Identifier: humanphysiology02luci (find matches)

Title: Human physiology

Year: 1913 (1910s)

Authors: Luciani, Luigi, 1842- Welby, Frances A. (Frances Alice) Camis, Marie Holmes, Gordon, Sir, 1876-1965 Pembrey, M. S. (Marcus Seymour), 1868-1934

Subjects: Physiology

Publisher: London : Macmillan and Co.

Contributing Library: MBLWHOI Library

Digitizing Sponsor: MBLWHOI Library

Text Appearing Before Image:

, Ptehfisch introduced a catheterinto the human bladder, provided with a two-way tap by whichboracic acid solution could be injected in order to increase thecontent and distension of the bladder. By a turn of the tap he ti VIII THE EXCRETION OF URINE 407 established communication between the bladder and a Gads metalmanometer which recorded the intravesical pressure on a revolvingdrum. The subject was then invited to micturate, and the urinewhich flowed from the urethra down the side of the catheterwas run into a filter communicating with a bottle connectedat atmospheric pressure with a Gads plethysmograph, which re-corded the flow of urine on the same drum. The arrangement isshown in Fig. 128. By this ingenious method Rehfisch was able ST

Text Appearing After Image:

Fio. 128.—Apparatus usediby Rehfisch to study micturition in man. The catheter K, introducedinto the bladder B, communicates either with the syringe N or the manometer .If, according asthe two-way tap D is set in position /. or II. The funnel T receives the urine which flowsfrom the urethra down the side of the catheter, and leads it through tube (. to flask F, whencethe pressure is transmitted by tube L to the plethysmograph V. The manometer records thecurve of vesical pressure A, Ii, on the revolving cylinder, and the plethysmograph the volumecurve of the urine C, D. to compare the pressure curve with that of vesical evacuation,during voluntary micturition. If the opening of the sphincter, as expressed in the rise of thelever, always coincided with the moment at which pressure in thebladder became maximal, this would show it to be the passiveeffect of the increased tension in the bladder, and would be anexperimental demonstration of the theory by which micturition 468 PHYSIOLOGY C

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1913

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