Abstract:

Objective  To analyze the correlation between the bladder weight (BW) and intravesical prostatic protrusion (IPP) and the degree of bladder outlet obstruction（BOO） in  the patients with benign prostatic hyperplasia (BPH) and to explore the clinical value of transabdominal ultrasonography in judgement of BOO in the patients with BPH. Methods Urodynamic examination was performed in 124 BPH patients from March 2009 to January 2011.

124 patients were divided into 2 groups (non-obstruction and obstruction). The  BW  and IPP were measured by transabdominal ultrasonography,the correlation between BW,IPP and the parameters reflecting BOO was analyzed.  Results  The BW values in  obstruction group and  non-obstruction group were (77.47±44.34) g and (57.47±23.10) g. There was significant difference in BW between  obstruction group and  non-obstruction group(P<0.05). The IPP values in   obstruction group and non-obstruction group were (11.05±9.65) mm and

(7.67±7.99) mm. There was significant difference in IPP between obstruction group and non- obstruction group(P<0.05). The BW value of all the patients with BPH was negatively correlated with Qmax(r=－0.177,P<0.05) and positively  correlated with PdetQmax (P<0.05,r=0.201). The IPP value was negatively correlated with Qmax(r=－0.403,P<0.01) and positively correlated with PdetQmax (r=0.192,P<0.01). Conclusion
The BW and IPP are highly correlated with BOO ,and evaluating BW and IPP with ultrasound is a reliable method to determine the degree of BOO.

Key words: prostatic hyperplasia;bladder outlet obstruction;urodynamics