title: Relationships between Prostatic Volume and Intravesical Prostatic Protrusion on Transabdominal Ultrasound and Benign Prostatic Obstruction in Patients with Lower Urinary Tract Symptoms.
abstract: BACKGROUND
  The objective of this study is to determine the relationships between prostatic volume (PV) and intravesical prostatic protrusion (IPP) with benign prostatic obstruction (BPO).
  
  
  METHODS
  A total of 408 males (aged 50 years and above) who presented with lower urinary tract symptoms (LUTS) suggestive of benign prostatic hyperplasia (BPH) were recruited. All had International Prostate Symptoms Score (IPSS), quality of life (QOL) index, uroflowmetry (Qmax) and postvoid residual urine (PVR) measured by transabdominal ultrasonography (TAUS). The PV and the degree of IPP were also measured by TAUS in the transverse and sagittal planes respectively. The PV is classified as Grade a, (20 ml or less), Grade b, (more than 20 ml to 40 ml) and Grade c, (more than 40 ml), while the IPP is graded as Grade 1 (5 mm or less), Grade 2 (more than 5 mm to 10 mm) and Grade 3 (more than 10 mm).
  
  
  RESULTS
  There was a fair positive correlation between the PV and IPP (Spearman, r(s) = 0.62, P <0.001) with important clinical exceptions. There was negative correlation between the PV and Qmax (rs = -0.20, P = 0.022), IPP and Qmax (r(s) = -0.30, P <0.001). PV and IPP were good predictors of BPO. However, IPP was slightly better (r(s) of -0.30 vs -0.20) than PV.
  
  
  CONCLUSIONS
  PV is related to IPP with important clinical exceptions. IPP is a better predictor of BPO than PV.
authors: Department of Urology, The First Affiliated Hospital of Chongqing Medical University, People's Republic of China.
authors: Delin
authors: D
authors: Wang
authors: Honghong
authors: H
authors: Huang
authors: Yan Mee
authors: YM
authors: Law
authors: Keong Tatt
authors: KT
authors: Foo
mesh_terms: D006801:Humans; D059411:Lower Urinary Tract Symptoms / Q000000981:diagnostic imaging / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D011467:Prostate / Q000000981:diagnostic imaging / Q000473:pathology*; D011470:Prostatic Hyperplasia / Q000000981:diagnostic imaging*; D011788:Quality of Life; D014463:Ultrasonography; D001743:Urinary Bladder / Q000000981:diagnostic imaging