| Summary: | 碩士 === 國立中興大學 === 生命科學院碩士在職專班 === 97 === OBJECTIVE: To predict the time point for removing urethral catheter is equivocal. Urologists make use of transballoon cystometry to evaluate bladder function. But the classic examples of cystometry diagram which the bladder function is good enough to urinate are difficult to determine. It is necessary to interpret functional characters of bladder by transballoon cystometry in acute urinary retention. MATERIALS AND METHODS: A total of 81 patients with acute urinary retention in a regional teaching hospital completed cystometry analysis which was done after indwelling urinary catheter or before removing urethral catheter. RESULTS: Intravesical pressure differed significantly between these two groups of ability and in-ability to urinate. Intravesical pressure and detrusor pressure at first desire (p=0.000), normal desire (p=0.009&0.002), strong desire (p=0.001), urgency (p=0.003) were significantly higher in the group of in-ability to urinate. The pressure difference between these two groups is 31% ~ 50%. CONCLUSIONS: When the decrease in intravesical pressure and detrusor pressure are around 31% ~ 50%, the urinary catheter could be removed successfully. We also construct a micturition equation from binary logistic regression. The equation is reliable, its sensitivity and specificity are 83.3% and 91.2% respectively. This micturition equation can be installed in urodynamic software and the successful rate of removing urinary catheter can be obtained whenever patient completes a cystometry analysis.
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