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How correlated is BOO with different objective parameters commonly used in evaluation of BPH: a prospective study

  • Urology - Original Paper
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Abstract

Objectives

The use of non-intubated uroflowmetry, PVR, prostate volume, and I-PSS are the most commonly used tools for the evaluation of patients with BPH. In this prospective study, we elucidated the correlation between BOO as rated by pressure-flow study in men with LUTS attributed to BPH and those parameters.

Methods

Over a period of 2 years 460 men above the age of 45 years old (mean age 60.46 ± 9.4) were prospectively included in this study. Symptoms were evaluated using the International Prostate Symptom Score, and digital rectal examination, prostate-specific antigen, and transrectal ultrasound were done. The urodynamic evaluation included uroflowmetry, filling cystometry, and voiding cystometry with the plotting of pressure-flow study according to Lin-PURR (Schäfer’s nomogram). The correlation coefficient was calculated between these variables.

Results

The correlation of other objective parameters with total score was not much better. The Spearman’s correlation coefficient were − 0.09, 0.07 and − 0.1 for prostate weight, post voiding residual urine and maximum free flow rate respectively. Correlations between Schäfer’s grade and Qmax, PVR and prostate volume were found to be weak to fair correlation (r values were − 0.4, 0.18, and 0.39 respectively).

Conclusion

Objective non-invasive parameters most commonly used in the evaluation of men with LUTS attributed to BPH have limited correlation with obstruction, as diagnosed by pressure flow nomogram.

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Abbreviations

BPH:

Benign prostatic hyperplasia

LUTS:

Lower urinary tract symptoms

BOO:

Bladder outflow obstruction

I-PSS:

International prostate symptom score

Q max :

Maximum flow rate

P det Q max :

Detrusor pressure at maximum flow

Lin PURR:

Linear passive urethral resistance relation

PVR:

Post-voiding residual urine

TRUS:

Transrectal ultrasound

DRE:

Digital rectal examination

PSA:

Prostate-specific antigen

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  1. Urology and Nephrology Center, Mansoura University, Mansoura, Egypt

    Bassem S. Wadie

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Correspondence to Bassem S. Wadie.

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Wadie, B.S. How correlated is BOO with different objective parameters commonly used in evaluation of BPH: a prospective study. Int Urol Nephrol 53, 635–640 (2021). https://doi.org/10.1007/s11255-020-02707-4

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