C.E. Constantinou, D.E. Govan Division of Urology, Department of Surgery, Stanford University School of Medicine, Standford Ca./U.S.A. 1. INTRODUCTION The purpose of thls paper 1s to descrlbe the b1omedlcal Instrumentation routlnely used 1n the Urodynamlcs Laboratory at Stanford to monltor and assess bladder and urethral functlon. In prlnclple thls Instrumentation 1s deslgned to evaluate the prlmary functlon of the bladder äs a storage vlscus and that of the urethra äs an outlet valve. Under Physiologie condltlons the bladder and urethra work synerglstlcally; storage of urlne proceedlng subconsclously and very slowly, whereas evacuatlon 1s 1n1t1ated at will and lasts less than one mlnute. In outHnlng the materlal of thls presentatlon the cHnlcal tests used 1n each phase of a urodynamlcs study will be Illustrated wlth sample recordlngs to demonsträte the Signal qualltles and transducer sens1t1v1t1es best sulted for the objectlve evaluatlon of the lower urlnary System. 2. METHODS A prlnclpal prerequlslte 1n the executlon of a urodynamlc study 1s the m1n1m1zat1on of catheter Invasion to the patlent. The scheme chosen here reduces the number of catheterlzatlons to a m1n1mum. To achleve thls a double lumen s'IHcon catheter 1s Inserted through the urethra 1nto the bladder. One lumen of the
Biomedizinische Technik / Biomedical Engineering – de Gruyter
Published: Jan 1, 1976
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