Synchronous Cystosphincterometry Using an Air-Filled Catheter for Assessing Detrusor-External Sphincter Coordination:...

Area of Science:

• Urology
• Urodynamics
• Medical Devices

Background:

• Assessing detrusor-external sphincter coordination is crucial for diagnosing voiding dysfunction.
• Current urodynamic methods may require specialized equipment like fluoroscopy or electromyography, limiting accessibility.

Purpose of the Study:

• To describe an air-filled catheter (AFC)-based technique for synchronous cystosphincterometry.
• To evaluate the technical feasibility and fluoroscopic correlation of this AFC method.
• To explore its potential as an adjunctive assessment in urodynamic laboratories lacking advanced imaging or EMG.

Main Methods:

• A retrospective feasibility study involving 32 patients undergoing video urodynamic studies.
• Utilized a 7-Fr air-filled dual-balloon catheter to simultaneously record vesical and urethral pressures.
• Correlated pressure recordings with voiding-phase fluoroscopic images.

Main Results:

• Synchronous bladder-urethral pressure measurement was technically feasible in all 32 patients without adverse events.
• Identified four distinct pressure-fluoroscopy patterns during voiding, characterizing sphincter relaxation and detrusor activity.
• Two cases suggested potential catheter displacement based on low urethral pressure readings.

Conclusions:

• Air-filled catheter-based synchronous cystosphincterometry is technically feasible and allows real-time characterization of detrusor-external sphincter pressure dynamics.
• This simplified pressure-based method can serve as a practical adjunctive tool for evaluating sphincter coordination, especially in resource-limited settings.
• Further prospective studies are needed to establish its diagnostic accuracy and reproducibility.