PTU - Polskie Towarzystwo Urologiczne
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The usefulness of pQ Schäfer?s nomogram in recommendation patients with benign prostatic hyperplasia to interventional therapies
Article published in Urologia Polska 2005/58/4.


Andrzej Prajsner 1, Wojciech Szewczyk 1, Włodzimierz Błaszkiewicz 2
1 I Katedra i Klinika Urologii Śląskiej Akademii Medycznej w Katowicach
Kierownik kliniki: prof. nadzw. ŚAM dr hab. Andrzej Prajsner
2 Oddział Urologiczny Szpitala Wojewódzkiego im. Jana Pawła II w Bełchatowie
Ordynator oddziału: dr n. med. Piotr Marks


prostate, benign prostatic hyperplasia, pressure-flow study, pQ Schäfer's nomogram


the aim of the study
The aim of the study was to answer the question to what extent the estimation of the subvesical resistance and the strength of the detrusor, which was based on pressure-flow study, may have an effect on the verification of indications to the TUR of the prostate, established on LUTS intensity and data from natural uroflowmetry.
material and methods
A total number of 84 men, ranged in age from 45 to 74 years (the average 61.8), was examined in the study. All these patients were qualified to the transurethral electoresection of the BPH on the basis of individual's medical history, LUTS intensity, digital rectal examination (DRE) and natural uroflowmetry (maximal peak flow was less than 15 ml/sec). The degree of subvesical resistance and strenght of the detrusor were determinated on the basis of pressure-flow study using PQ Schäfer's nomogram.
A low subvesical resistance (I and II degree) was detected among 22 patients (26.1%), whereas moderate resistance (III degree) among 6 (7.2%). The remaining 56 men (66.7%) presented high subvesical resistance including 6 patients with the highest degree. A surgery treatment was performed only on the patients with III and higher degrees of subvesical resistance and these with II degree, but with weak detrusor and with post voiding residual more than 20% of functional bladder capacity.
The indication to interventional therapies among men with BPH can be verified by pressure-flow study which establishes the degree of the subvesical resistance as well as the strenght of the detrusor. The use of simple PQ Schäfer's nomogram doesn't require a very complicated software and can be usefull for owners of very simple urodynamical devices.


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Andrzej Prajsner
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