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NUO 2505 Color Duplex-Doppler us of intrarenal arteries in detection of renal artery stenosis & evaluation of PTA successfulness
NEPHRO-UROLOGY
s.59
NU02503
NU02506
SCREENING OF THE RENAL ARTERY STENOSIS WITH COLOR DOPPLER SONOGRAPHY (COMPARATIVE STUDY WITH ANGIOGRAFHY).
IDENTIFICATION OF CROSSING VESSELS AT THE URETEROPELVIC JUNCTION BY MEANS OF COLOR DOPPLER SONOGRAPHY nd Frauscha. Vinzenz Smekal, Girnter Janetschek, Gernot Helweg, Georg Bartsch, Dieter zur Nedden Department of Radiology II and Urology, University of Innsbruck. Austria
Ilka R.S. de Oliveira, Azzo Widmann Giovanni Guido Cerri. Divisao de Ultra-sonografia, Instituto de Radiologia, Hospital das Clinicas, Faculdade de Medicina da Universidade 60 Paulo, Brasil.
de
Duplex ultrasound is proposed as a reliable noninvasive method for the populational screening of the renal artery disease. Fifty patients were submitted to a renal duplex evaluation and to an angiography of the renal arteries. The diagnosis of renal artery stenosis was determined by duplex scanning based on renal artery peak svstolic velocitv (PSV). the ratio of the renal artery"PSV to'that of the adjacent abdominal aorta (renal-aortic ratio, or RAR), the ratio of the renal artery PSV to that ot the intra-renal segmental artery (renal-segmental artery ratio,or RSR) and the absolute systolic acceleration of the segmental intrarenal vessels. There is a comparison between the sensibility and specificity of each of the parameters. The preliminary results indicate that the renal artery PSV is still the major criterion on the diagnosis, the segmental vessel systolic acceleration providing a marginal improvement in sensitivity.
Objectives: To investigate the value of color Doppler ultrasound (CDU) in the identification of crossing vessels at the ureteropelvic junction (UPJ) prior to surgery. Methods: 22 patients with a mean age of 50 years (2 19.8) were examined using CDU. In all cases ultrasound contrast agent (Levovist, Schering Germany) was injected before examination. Pulsed Doppler (PD) measurement was performed to differentiate between arterial and venous flow. In addition the position of the vessel (ventral or dorsal) relative to the UPJ was assessed. Following this preoperative workup 13 patients underwent surgery. Results: In 20 of 22 patients crossing vessels were identified. The vessels were between 1.5 and 5mm in diameter; 16 were ventral and 4 dorsal located. 14 arteries and 6 veins were identified.The results obtained on CDU were confirmed by the findings on surgery in 12 of 13 cases. Conclusions: The diagnostic accuracy of CDU is greatly enhanced by the use of an ultrasound contrast agent and a diuretic and is helpful in planning surgery.
NUO2505
NU02507
COLOR DUPLEX-DOPPLERUS OF INTRARENAL ARTERIES IN DETECTION OF RENAL ARTERY STENOSIS & EVALUATION OF PTA SUCCESSFULNESS
COLOR-DOPPLER ULTRASOUND OF THE PROSTATE: ASSESSMENT OF THE RESISITIVE INDEX (RI) Gernot HelwegFerdinand Frauscher. Peter Sdgner. Hannes Strasser. Dieter zur Nedden. Gernot Bartsch Department of Radiology II and Urology, University of Innsbruck. Austria
Boris Brkliacic. Ivan Drinkovic, Andrea Cvitkovic, Andrija Hebrang. US Ccntcr, Department of Radiology, University Hospital “Merkur”, Zagreb, Croatia To compare color Duplex-Doppler US (CDD US) findings in intrarcnal arteries with DSA of renal arteries in detection of renal artery stenosis @AS). To evaluate CDD US in the assessment of successfulness of percutaneous transluminal angioplasty (PTA) of renal arteries. Methods: In 35 pts with DSA findings of RAS CDD US of intrarenal arteries was performed, as well as in 9 pts before and after the PTA of RA. Doppler spcctras were compared between two kidneys and assessedsubjectively as normal or pathological. Results: “Parvus and tardus” type of spectra was found in 16 pts with high grade (80% or higher) RAS on DSA. In I9 pts with lower degrees of RAS on DAS, Doppler spectra were not significantly different compared to normal kidneys. In all 9 pts, after the successful PTA “parvus and tardus” spectra dissapcared in intrarenal arteries on CCD US examination. Conclusion: “Parvus and Tardus” Doppler spectra in in&arena1 arteries are noted only in high-degree angiographical RAS; their disappearance indicates the successfulnessof PTA of the RAS. Objectives:
Objectives: To evaluate the role of color-Doppler (CDU) using the resistive-index (RI) in the normal prostatic hyperplasia (BPH) and prostate cancer.
ultrasound prostate, benign
Methods: 88 patients (22 with normal prostate, 41 with BPH and 25 with prostate cancer) with a mean age of 55 (+ 18.4) were examined by CDU. We measured the RI in peripheral, central and transitional zones. The diagnosis of BPH and prostate cancer was histologically proven. Results: In the peripheral and transitional zones the RI did not vary significantly between any of the groups (measuring 0.83 f0.05 in the periphery and 0.64 f0.06 in the transitional zone). In the central zone the RI was significantly elevated in only the BPH patients, measuring 0.77 kO.05 compared to 0.65 +0.07 in the other groups. Conclusions: Resistive index measurements cannot be used to exclude prostate cancer. An elevated RI (over 0.75) in the central zone, however, is indicative of BPH.
s.59
NU02503
NU02506
SCREENING OF THE RENAL ARTERY STENOSIS WITH COLOR DOPPLER SONOGRAPHY (COMPARATIVE STUDY WITH ANGIOGRAFHY).
IDENTIFICATION OF CROSSING VESSELS AT THE URETEROPELVIC JUNCTION BY MEANS OF COLOR DOPPLER SONOGRAPHY nd Frauscha. Vinzenz Smekal, Girnter Janetschek, Gernot Helweg, Georg Bartsch, Dieter zur Nedden Department of Radiology II and Urology, University of Innsbruck. Austria
Ilka R.S. de Oliveira, Azzo Widmann Giovanni Guido Cerri. Divisao de Ultra-sonografia, Instituto de Radiologia, Hospital das Clinicas, Faculdade de Medicina da Universidade 60 Paulo, Brasil.
de
Duplex ultrasound is proposed as a reliable noninvasive method for the populational screening of the renal artery disease. Fifty patients were submitted to a renal duplex evaluation and to an angiography of the renal arteries. The diagnosis of renal artery stenosis was determined by duplex scanning based on renal artery peak svstolic velocitv (PSV). the ratio of the renal artery"PSV to'that of the adjacent abdominal aorta (renal-aortic ratio, or RAR), the ratio of the renal artery PSV to that ot the intra-renal segmental artery (renal-segmental artery ratio,or RSR) and the absolute systolic acceleration of the segmental intrarenal vessels. There is a comparison between the sensibility and specificity of each of the parameters. The preliminary results indicate that the renal artery PSV is still the major criterion on the diagnosis, the segmental vessel systolic acceleration providing a marginal improvement in sensitivity.
Objectives: To investigate the value of color Doppler ultrasound (CDU) in the identification of crossing vessels at the ureteropelvic junction (UPJ) prior to surgery. Methods: 22 patients with a mean age of 50 years (2 19.8) were examined using CDU. In all cases ultrasound contrast agent (Levovist, Schering Germany) was injected before examination. Pulsed Doppler (PD) measurement was performed to differentiate between arterial and venous flow. In addition the position of the vessel (ventral or dorsal) relative to the UPJ was assessed. Following this preoperative workup 13 patients underwent surgery. Results: In 20 of 22 patients crossing vessels were identified. The vessels were between 1.5 and 5mm in diameter; 16 were ventral and 4 dorsal located. 14 arteries and 6 veins were identified.The results obtained on CDU were confirmed by the findings on surgery in 12 of 13 cases. Conclusions: The diagnostic accuracy of CDU is greatly enhanced by the use of an ultrasound contrast agent and a diuretic and is helpful in planning surgery.
NUO2505
NU02507
COLOR DUPLEX-DOPPLERUS OF INTRARENAL ARTERIES IN DETECTION OF RENAL ARTERY STENOSIS & EVALUATION OF PTA SUCCESSFULNESS
COLOR-DOPPLER ULTRASOUND OF THE PROSTATE: ASSESSMENT OF THE RESISITIVE INDEX (RI) Gernot HelwegFerdinand Frauscher. Peter Sdgner. Hannes Strasser. Dieter zur Nedden. Gernot Bartsch Department of Radiology II and Urology, University of Innsbruck. Austria
Boris Brkliacic. Ivan Drinkovic, Andrea Cvitkovic, Andrija Hebrang. US Ccntcr, Department of Radiology, University Hospital “Merkur”, Zagreb, Croatia To compare color Duplex-Doppler US (CDD US) findings in intrarcnal arteries with DSA of renal arteries in detection of renal artery stenosis @AS). To evaluate CDD US in the assessment of successfulness of percutaneous transluminal angioplasty (PTA) of renal arteries. Methods: In 35 pts with DSA findings of RAS CDD US of intrarenal arteries was performed, as well as in 9 pts before and after the PTA of RA. Doppler spcctras were compared between two kidneys and assessedsubjectively as normal or pathological. Results: “Parvus and tardus” type of spectra was found in 16 pts with high grade (80% or higher) RAS on DSA. In I9 pts with lower degrees of RAS on DAS, Doppler spectra were not significantly different compared to normal kidneys. In all 9 pts, after the successful PTA “parvus and tardus” spectra dissapcared in intrarenal arteries on CCD US examination. Conclusion: “Parvus and Tardus” Doppler spectra in in&arena1 arteries are noted only in high-degree angiographical RAS; their disappearance indicates the successfulnessof PTA of the RAS. Objectives:
Objectives: To evaluate the role of color-Doppler (CDU) using the resistive-index (RI) in the normal prostatic hyperplasia (BPH) and prostate cancer.
ultrasound prostate, benign
Methods: 88 patients (22 with normal prostate, 41 with BPH and 25 with prostate cancer) with a mean age of 55 (+ 18.4) were examined by CDU. We measured the RI in peripheral, central and transitional zones. The diagnosis of BPH and prostate cancer was histologically proven. Results: In the peripheral and transitional zones the RI did not vary significantly between any of the groups (measuring 0.83 f0.05 in the periphery and 0.64 f0.06 in the transitional zone). In the central zone the RI was significantly elevated in only the BPH patients, measuring 0.77 kO.05 compared to 0.65 +0.07 in the other groups. Conclusions: Resistive index measurements cannot be used to exclude prostate cancer. An elevated RI (over 0.75) in the central zone, however, is indicative of BPH.