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. 2024 Feb 6;14(2):e071923. doi: 10.1136/bmjopen-2023-071923

Table 3.

Changes in the urinary flow rate, PVR and IPSS after balloon dilation

Study Location of the strictures Length of strictures
Virasoro et al28 Anterior urethra ≤ 2 cm
Elliott et al27 Anterior urethra ≤ 3 cm
Zhou et al35 Anterior urethra (n=36, 80%); posterior urethra (n=9, 20%) ≤ 2 cm
Chhabra et al36 Anterior urethra (n=110, 76%); posterior urethra (n=8, 6%); both (n=26, 18%) ≤ 1.5 cm (n=130, 90%);
> 1 cm (n=14, 10%)
Vyas et al39 Anterior urethra (n=114, 95%); posterior urethra (n=6, 5%) ≤ 1.5 cm
MacDiarmid et al41 Anterior urethra (n=49, 96%); posterior urethra (n=2, 4%) /
IPSS
Before surgery 3 months 6 months 1 year 2 years 3 years
25.2±4.5 (n=53) 6.1±7.6 (n=51) 4.6±5.2 (n=45) 4.5±3.9 (n=40) 6.9±7.7 (n=38) 5.5±6.9 (n=33)
22.0±6.8 (n=79) 7.4±5.8 (n=74) 8.3±6.2 (n=71) 9.0±7.1 (n=67) / /
/ / / / / /
/ / 12.7 (n=112) 12.6 (n=112) / /
21.6 (n=120) 11.4 (n=120) 12.6 (n=120) / / /
/ / / / / /
Qmax (mL/s)
Before surgery 3 months 6 months 1 year 2 years 3 years
5.0±2.6 (n=46) 22.2±12.5 (n=51) 19.8±10.8 (n=45) 20.1±10.0 (n=39) 17.5±10.4 (n=38) 15.1±8.3 (n=33)
7.6±3.4 (n=78) 18.6±10.9 (n=71) 16.6±8.9 (n=69) 15.5±9.0 (n=65) / /
5.6±1.4 (n=45) 19.8±3.9 (n=45) / / / /
5.2±2.7 (n=144) / 15.4±7.2 (n=112) 12.6±5.7 (n=112) / /
5.7 (n=120) 14.3 (n=120) 12.7 (n=120) / / /
10.4 (n=48) 15.3 (n=43) 17.7 (n=27) 15.2 (n=5) / /
PVR (mL)
Before surgery 3 months 6 months 1 year 2 years 3 years
141.4±105.1 (n=43) 141.4±105.1 (n=51) 30.0±42.8 (n=45) 24.6±32.1 (n=39) 45.5±49.5 (n=38) 50.2±62.5 (n=33)
109.8±116.9 (n=77) 103.4±134.4 (n=70) 73.1±117.7 (n=67) 94.6±121.8 (n=66) / /
/ / / / / /
/ / / / / /
90.2 (n=120) 34.2 (n=120) 20.2 (n=120) / / /
/ / / / / /

IPSS, International Prostate Symptom Scores; PVR, postvoid residual urine volume; Qmax, maximum uroflow.