F-2-06-03
THE INFLUENCE OF BLADDER FULLNESS ON SONOGRAPHIC DIAGNOSIS OF HYDRONEPHROSIS IN SPINAL CORD INJURED PATIENTS
Liu I. Bih, Su J. Tsai, Lie J. Dong, (Taichung Rehabilitation Hospital, Taichung, Taiwan)
Purpose: To evaluate the accuracy of pre-voiding and post-voiding renal sonography on hydronephrosis in spinal cord injured patients.
Methods: There were 67 spinal cord injury patients recruited consecutively from January 1993 through June 1996 at Taichung Rehabilitation Hospital. Hydronephrosis demonstrated by excretory urogrphy was used as golden diagnostic standard. Renal sonography was performed twice when patient's bladder was physiologically full and just emptied individually. The sensitivity, specificity and negative predictive value were calculated separately for pre-voiding and post-voiding sonography.
Results: There were 24 renal units of 16 patients (23.9%) revealed hydronephrosis by excretory urography. The sensitivity, specificity and negative predictive value of pre-voiding renal sonography were 95.8%, 84.5% and 99.0% while the sensitivity, specificity and negative predictive value were 87.5%, 94.8% and 97.4% respectively for post-voiding renal sonography.
Conclusions: Non-invasive and cost-effective renal sonography is a sensitive screening test in detecting hydronephrosis on spinal cord injured patients especially in pre-voiding phase.
F-2-06-04
APPLICATION OF RENAL SONOGRAPHY AND RADIOISOTOPE SCANNING FOR SCREENING OBSTRUCTIVE NEPHROPATHY ON SPINAL CORD INJURED PATIENTS
Su J. Tsai, Liu I. Bih (Taichung Rehabilitation Hospital, Taichung, Taiwan)
Objective: To evaluate the accuracy of renal sonography and radioisotope scanning on obstructive nephropathy in spinal cord injured patients.
Material and methods: The renal sonography, renal radioisotope scanning, excretory urography were performed for 170 spinal cord injured patients from January 1993 through June 1996 at Taichung Rehabilitation Hospital. The sensibility, specificity, positive predictive value and negative predictive value of renal sonography and radioisotope scanning were calculated separately accorded with the excretory urography.
Results: The sensibility, specificity, positive predictive value and negative predictive value of renal sonography in detecting renal obstruction were 0.92, 0.87, 0.59, 0.98 respectively while the sensibility, specificity, positive predictive value and negative predictive value of radioisotope scanning were 0.89, 0.83, 0.55, 0.97.
Conclusion: The renal sonography and radioisotope scanning are safe, sensitive and specific tests in detecting obstructive nephropathy probably because the renal sonography provides intrarenal anatomic information and the radioisotope scanning offers additional renal drainage function regarding effective renal plasma flow. The combination of both diagnostic modalities was postulated to be a reliable alternative to excretory urography.
