Detrusor Muscle Thickness and Prostate Volume in the Diagnosis of Bladder Outlet Obstruction
Nwosu CS *
Department of Radiology, Nnamdi Azikiwe University Teaching Hospital Nnewi, Anambra State, Nigeria.
Ezenekwe EF
Department of Radiology, Nnamdi Azikiwe University Teaching Hospital Nnewi, Anambra State, Nigeria.
Nwammuo CBI
Department of Radiology, Nnamdi Azikiwe University Teaching Hospital Nnewi, Anambra State, Nigeria.
Nwabunike MO
Department of Radiology, Nnamdi Azikiwe University Teaching Hospital Nnewi, Anambra State, Nigeria.
Isiakpu IO
Department of Radiology, Nnamdi Azikiwe University Teaching Hospital Nnewi, Anambra State, Nigeria.
Mbanefo IB
Department of Radiology, Nnamdi Azikiwe University Teaching Hospital Nnewi, Anambra State, Nigeria.
Obi-Nwosu, AL
Department of General Out-patient, Nnamdi Azikiwe University Teaching Hospital Nnewi, Anambra State, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
Introduction: Bladder outlet obstruction (BOO) is a common diagnosis and it is reported to be the most common urological problem of elderly male patients which can lead to detrusor instability in 50% to 70% of men with benign prostatic hyperplasia. This study aimed to determine the relationship between detrusor muscle thickness, prostate volume, and International Prostate Symptom Score [IPSS] in patients with BOO using ultrasound.
Methods: This is a prospective, descriptive comparative sonographic evaluation of the detrusor muscle thickness in participants with BOO using IPSS as a gold standard.
Results: The most frequent age group with BOO was 60 – 69 years 32[32%] subjects. IPSS score distribution showed mild in 17 [17%] subjects, moderate in 78 subjects [78%], and severe in 5 subjects [5%] in the BOO group. The control group showed that 100 [100%] subjects fell within the mild score category. Statistical significance was a p-value of 0.000. Moderate and severe IPSS showed p- value of 0.006. Association between IPSS and DWT showed a value of 0.675, Association between IPSS and prostate volume had a value of 0.657, and association between DWT and Prostate volume had a value of 0.787. DWT and prostate volume each had sensitivity, NPV, and PPV of 52%, 0.53, and 0.51 for BWT and 59%, 0.63, and 0.56 for prostate volume respectively. Both parameters also showed low specificity of 48% for DWT and 44% for prostate volume. Both parametres show sensitivity of 52% for DWT and 59% for prostate volume.
Conclusion: Sonographic measurement of BWT is a good tool in the assessment of BOO.
Keywords: Subjects, DWT, BOO, IPSS, prostate volume