Related Experiment Video
Updated: Aug 17, 2026

Ultrasonography of the Adult Male Urinary Tract for Urinary Functional Testing
Published on: August 14, 2019
[Etiology and treatment of bladder spasm associated with benign prostatic hyperplasia]
Jun Zhao1, Da-lin He, Run-ming Liu
1Department of Urology, the First Hospital of Xi'an Jiaotong University, Institute of Urology, Medical School of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China. zj9488@sina.com.cn
Objective:
To investigate the etiology and treatment of bladder spasm associated with benign prostatic hyperplasia (BPH).
Methods:
Urodynamic tests were performed in 102 cases of BPH before operation. The correlation of bladder spasm with aging, international prostate symptom score (IPSS), quality of life, prostatic volume, operation methods and urodynamic indexes was studied by t and chi2 tests.
Results:
The incidences of bladder spasm in the lower compliant bladder and unstable bladder were 32.1% (9/28) and 42.5% (13/20), and those after suprapubic prostatectomy and transurethral resection of the prostate (TURP) were 50.9% (26/51) and 23.3% (12/51). There was significant difference between operation methods (P < 0.05).
Conclusion:
Bladder spasm easily develops in the lower compliant bladder and unstable bladder, especially after suprapubic prostatectomy. TURP might decrease the incidence of bladder spasm after BPH operation.
Related Concept Videos
Anatomy of the Genitourinary System II: Bladder and Urethra
The Micturition Reflex
The process begins with bladder filling, where the bladder wall stretches as urine accumulates. This stretching activates the urine storage reflex, mediated by the sacral spinal segments and the pontine storage center. Efferent sympathetic impulses stimulate the detrusor muscle to relax and the internal urethral sphincter to contract, facilitating urine...
Disorders of the Male Reproductive System
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra. Symptoms...
Spasmolytic Agents: Chemical Classification
A major class of centrally acting spasmolytics is the α2-agonist, such as tizanidine. These drugs bind to α2-adrenoceptors, inhibiting the release of the excitatory neurotransmitter glutamate. They also promote...
Urinary Tract Calculi III: Medical Management
Vascular Spasm