- Top of page
- Patients and Methods
- Conflicts of Interest
- Appendix 1. Modified IPSS nomogram
- To assess whether the penile cuff non-invasive urodynamic test serves as an effective diagnostic tool for predicting outcomes prior to disobstructive surgery for men presenting with voiding lower urinary tract symptoms.
- Patients with proven urodynamic obstruction do better after surgery. The current gold standard, invasive pressure-flow studies, imposes cost, resource demand, discomfort and inconvenience to patients.
Patients and Methods
- Patients undergoing surgery for prostatic obstruction at Palmerston North Hospital had pre-operative non-invasive urodynamics and completed an International Prostate Symptom Score (IPSS). Catheterised patients were excluded.
- Two months post-operatively they completed a further IPSS score.
- An improvement of seven or greater was defined as a clinically successful outcome.
- Results were compared with the outcome predicted by the nomogram supplied with the urodynamic device.
- Data was obtained for 62 patients with mean age 70 years (range 49 to 86 years; SD 9 years). Follow-up was complete for all patients.
- Thirty-eight patients underwent transurethral resection and 24 holmium laser enucleation of the prostate. Mean IPSS score was 21 (range 5 to 35; SD 6) pre-operatively and 11 (range 1 to 31; SD 9) post-operatively.
- Thirty-five patients were predicted obstructed and 27 not obstructed.
- 94% of those predicted obstructed had a successful outcome (p < 0.01).
- 70% predicted as not obstructed did not have a successful outcome after surgery (p < 0.01).
- The penile cuff test is an exciting adjunct in the decision to proceed to surgery for prostatic obstruction.
- Patients predicted to be obstructed have an excellent likelihood of a good surgical outcome, yet 30% of those shown not to be obstructed will still do well.
- Whilst numbers in our study are small, outcomes compare favourably with published results on invasive urodynamic methods.