Air Cystometry

A Decade of Experience with Electronic Simulation of the Micturition Reflex

“…Investigation of the neural innervation of the detrusor muscle [17] indicated that preganglionic nerve fibers, intramural ganglia and nerve fibers were also stimulated and that examination of stimulation of these elements was required. In addition, the vascular supply to the detrusor muscle may be al tered during stimulation [14]. This would be expected to induce neural and mus cular excitability changes.…”

“…To delineate reflex abnormalities in the patient with neurologic impairment of bladder function we have employed air cystometry [14], percutaneous stimulation of the sacral nerve root innervation of the urinary bladder [13] and electromy ography of voiding [1], To quantitate end organ change we have employed histo logical examination and biochemical testing of detrusor muscle biopsies. These techniques have been supplemented by conventional radiographic methods of mea suring change in the urinary tract including intravenous pyelogram and voiding cystogram, residual urine estimation and urine cultures.…”

Advances in Diagnostic Urology

“…Gas cystometry is the less complicated technique and therefore particularly suited for urological use (Bradley et al 1968(Bradley et al , 1975. The basic requirement for clinical employment of gas cystometers is secure reducing valves which reduce the high gas pressure in the supply cylinders ofmore than 600 mb ar to physiological filling pressure.…”

A Comparative Study of Water Cystometry and CO₂ Cystometry

“…In 1968, Bradley et al (1) de scribed an air cystometer with continuous flow and continuous pressure record ing. Since then gas cystometry has gained in popularity although air has been replaced with C 0 2 as filling medium after the report of a case of fatal air embolism (8).…”