title: [Qualitative grading of detrusor contractility in benign prostatic hyperplasia patients].
abstract: To grade qualitatively detrusor contractility in benign prostatic hyperplasia (BPH), we studied 120 BPH patients aged from 58 to 89 years. The pressure-flow studies were performed. The passive urethral resistance relation (PURR) and Schäfer diagram were used to analyse the results. The detrusor contractility was divided into 4 classes: very weak (VW), weak (W), normal (N), and strong (ST). The types of pressure-flow were high pressure--low flow (HP-LF), high pressure--high flow (HP-HF), low pressure--low flow (LP-LF) and low pressure--high flow (LP-HF) type. The results showed that the incidence of VW, W, N and ST class was 12.5%, 26.7%, 47.5% and 13.3% respectively; the incidence of HP-LF, HP-HF and LP-LF type was 55%, 1.7% and 43.3% respectively. The weak detrusor strength could become powerful by the surgery treatment of bladder outflow obstruction (BOO) and the function training of detrusor. The detrusor strength class of a BPH patient was improved from W before surgery to N after surgery in our studies. The principles of the fluid dynamics and urodynamic and the clinical application of the qualitative grading of detrusor contractility were discussed.
authors.affiliation: Department of Urology, Beijing 309 Hospital.
authors.forename: L
authors.initials: L
authors.lastname: Liao
authors.forename: B
authors.initials: B
authors.lastname: Shi
authors.forename: C
authors.initials: C
authors.lastname: Liang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D006801:Humans; D008297:Male; D008875:Middle Aged; D009119:Muscle Contraction; D009130:Muscle, Smooth / Q000503:physiopathology; D011470:Prostatic Hyperplasia / Q000503:physiopathology*; D001743:Urinary Bladder / Q000503:physiopathology*; D014563:Urodynamics