Korean J Urol.  2003 Jun;44(6):534-539.

The Usefulness of Pressure-Flow Study as Preoperative Evaluation in Benign Prostatic Hyperplasia Patients

• Seo YJ
• Seo HK
• Chung MK

Abstract

PURPOSE: To evaluated the usefulness of pressure-flow study (PFS) as a preoperative technique, and to compare its sensitivity and specificity, with uroflow, post void residual urine and prostate volume, in benign prostatic hyperplasia patients.
MATERIALS AND METHODS
The records of 109 men, with lower urinary tract symptoms that underwent a transurethral resection of prostate (TURP), between May 1995 and June 2002, were retrospectively analyzed. Fifty one patients underwent preoperative PFS and 58 did not. The PFSs were performed with an 8Fr suprapubic catheter. The results of the PFS were divided into two groups: obstructed and unobstructed, using an ICS nomogram, pQ slope or the minimal urethral opening pressure. The outcomes of the operations were estimated with IPSS and the maximal flow rate 3 month after the operations.
RESULTS
With the PFS operations, 47 cases (81.0%) were obstructed and 11 (19.0%) unobstructed. The success rates of the TURP for the obstructed, unobstructed and non-invasive study groups were 87.2, 63.6 and 88.2%, respectively. The sensitivity and specificity of the PFS were 84.5 and 40.4%, respectively. The sensitivity of the maximal flow rate (or=30gm) was 50.0%.
CONCLUSIONS
PFS is not a mandatory preoperative technique for men, with lower urinary tract symptoms, who undergo a TURP. However, it can decrease the TURP failure rate. Other noninvasive parameters can be preoperatively useful for men who undergo TURP, as long as they are applied compositely carefully.

Keyword

Prostatic hyperplasia; Urodynamics; Transurethral resection of prostate

MeSH Terms

Catheters
Humans
Lower Urinary Tract Symptoms
Male
Nomograms
Prostate
Prostatic Hyperplasia*
Retrospective Studies
Sensitivity and Specificity
Transurethral Resection of Prostate
Urodynamics