Journal of Yeungnam Medical Science

Original Articles

Power Doppler Sonography for the Upper Urinary Tract Infection in Children.: Jung Youn Choi, Jae Ho Cho, Yong Hoon Park; Yeungnam Univ J Med. 2007;24(2):179-185. Published online December 31, 2007; DOI: https://doi.org/10.12701/yujm.2007.24.2.179

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BACKGROUND
Urinary tract infection (UTI) is common in children. The available gold standard methods for diagnosis, Tc-99m dimercaptosuccinic acid (DMSA) scan and computed tomography (CT) are invasive and expensive. This study was performed to assess the role of power Doppler ultrasound (PDU) for diagnosis of acute pyelonephritis (APN). MATERIALS AND METHODS: A prospective study was conducted in 25 children with aged 2 weeks to 5 years who were hospitalized with the first episode of febrile UTI suggesting acute pyelonephritis. All children were examined in the first 3-5 days of admission by PDU and Tc-99m DMSA scan. The comparison between PDU and DMSA scan was performed on the basis of patients. RESULTS: The sensitivity and specificity of PDU for the detection of affected kidneys were 38.1% and 50.0%, and the positive predictive value and negative predictive value were 61.9% and 50.0%, respectively. Vesicoureteral refluxes (VUR) were identified in 11 patients (44.4%) and 18 kidneys (36%). The PDU and DMSA scan showed a matching perfusion defect in 23.8% and 50.0% respectively. CONCLUSION: These data indicate the PDU has a relatively low sensitivity and specificity for differentiating APN from lower UTI but may be a complement tool to DMSA scan for the prediction of VUR in infants and children.

Citations

Citations to this article as recorded by

Comparison of 99mTc-DMSA Renal Scan and Power Doppler Ultrasonography for the Detection of Acute Pyelonephritis and Vesicoureteral Reflux
Hee Jung Bae, Yong-Hoon Park, Jae Ho Cho, Kyung Mi Jang
Childhood Kidney Diseases.2018; 22(2): 47. CrossRef
Urinary tract infections in pediatric oncology patients with febrile neutropenia
Kyoo Hyun Suh, Sun Young Park, Sae Yoon Kim, Jae Min Lee
Yeungnam University Journal of Medicine.2016; 33(2): 105. CrossRef

Impact of Hemodialysis on Left Ventricular Performance: A Doppler Echocardiographic Study.: Dong Oh Kang, Du Ha Lee, Hyun Seo Kim, Hyun Su Kim, Sung Rok Kim, Jong Seon Park; Yeungnam Univ J Med. 1999;16(2):309-317. Published online December 31, 1999; DOI: https://doi.org/10.12701/yujm.1999.16.2.309

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Abstract PDF: BACKGROUND
Left ventricular diastolic filling is an important determinant for maintenance of cardiac output during hemodialysis. Few investigators have studied the influence of hemodialysis on diastolic function. To evaluate the change of left ventricular systolic and diastolic function, we performed M-mode and Doppler echocardiopraphic studies before and after hemodialysis. METHODS: The study population consisted of 30 patients(15 patients were male, mean age 45+/-10 years) with CRF on maintenance henodialysis. They have normal left ventricular systolic function(Fractional shortening > 30%) and no evidence of valvular heart disease or regional wall motion abnormalities. The ejection fraction(EF) was measured using M-mode echocardiography and Doppler indices such as peak E velocity, peak A velocity, isovolumetric relaxaion time(IVRT), deceleration time(DT), and left ventricular ejection time(LVET) obtained from Doppler echocardiography. The index of myocardial performance(IMP) was calculated from each of the Doppler velocity indices. RESULTS: The weight reduction after hemodialysis was 2.1+/-1.0kg(p<0.0001). After hemodialysiss, there was some decrease in blood pressure(p<0.05), but no significant change in heart rate, EF and fractional shortening, mean VCF, peak A velocity, and DT. And significant in IVRT and IMP(p<0.05, p<0.0001) were noted. CONCLUSTION: In conclusion, preload reduction is the main mechanism that accounts for changes in Doppler diastolic indices after hemodialysis. And and increased IMP suggests that diastolic function may be aggravated after gemodialysis, and that implies impaired left ventricular filling and disturbed left ventricular compliance.

The Measurement of Blood Flow of Anterior Cerebral Artery in Premature Newborns Using Duplex Dopple Ultrasonography.: Mi Soo Hwang, Kyeung Kug Bae, Jae Kyo Lee; Yeungnam Univ J Med. 1997;14(1):77-84. Published online June 30, 1997; DOI: https://doi.org/10.12701/yujm.1997.14.1.77

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Abstract PDF: We measured the blood flow velocity of the anterior cerebral artery via anterior fontanelle approach of fifty five preterm neonates with duplex Doppler sonography and analyzed the waveform and calculated pulsatility index were increased with increasing gestational age, birth weight, and age of the neonate, but resistive indices decreased. In sick babies, characteristic resistive index increment were seen in patients with intraventricular hemorrhage, but no statistical difference was seen in patients with respiratory distress syndrome. Our results suggest that duplex Doppler sonography is a use ful noninvasive means of monitoring cerebrohemodynamics in normal pretem neonates and flow change of sick babies.

A study on the fetal umbilical artery doppler blood flow velocity waveforms in normal pregnancy.: Cheol Seong Bae, Gee Jin Kwun, Doo Jin Lee, Yoon Kee Park, Sung Ho Lee, Kil Ho Cho; Yeungnam Univ J Med. 1991;8(1):63-71. Published online June 30, 1991; DOI: https://doi.org/10.12701/yujm.1991.8.1.63

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Abstract PDF: Noninvasive techniques of antenatal detection of the fetal development and well-being such as biophysical profile, non-stress and stress remain major challenges in modern obstetric practice. To obtain and analyze umbilical artery velocity waveform by pulsed-wave doppler ultrasound, a total of 160 determinations were carried out on 157 normal pregnant women between 16th to 41st week gestation. The ratio of peak systolic to end-diastolic flow velocity (S/D ratio), pulsatility index and resistance index were measured as indices of the resistance in feto-placental circulation. The results were as follows: As gestation advances, the mean values for peak systolic and end-diastolic velocities raised progressively. As gestation advances, the mean values for the S/D ratio declined progressively, exhibiting high diastolic flow velocity caused by low resistance. Pulsatility index, and resistance index were also declined progressively, as gestation advances. The analysis of umbilical artery blood flow velocity waveforms provides a new noninvasive technique to evaluate fetal development and well-being, and may be expected a reliable method for assessment of fetal life.

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