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Color doppler imaging (GDI) is a diagnostic tool that allows non-invasive evaluation of the orbital and intra-cranial structures. It operates by the doppler principle, which is detecting changes in the frequency of sound that is r...
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Color doppler imaging (GDI) is a diagnostic tool that allows non-invasive evaluation of the orbital and intra-cranial structures. It operates by the doppler principle, which is detecting changes in the frequency of sound that is reflected from flowing blood, allowing estimation of flow velocity. GDI has been used in the diagnosis and follow up of ophthalmic conditions such as central retinal artery occlusion, central retinal vein occlusion, arteritic and non-arteritic ischemic optic neuropathy and the ocular ischemic syndrome. In addition, orbital conditions like varices can be evaluated. Transcranial doppler has been used to assess strokes and arteriovascular malformations of the brain. The main limitation of GDI is that it provides information about velocity and not flow. Despite this, it remains a valuable tool to diagnose ocular and intracranial conditions characterized by ischemia or abnormal blood flow.
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Estimated foetal weight less than the 10th percentile at that gestational age is known as intra st st uterine growth restriction (IUGR). Over the period of 1 July 2021 till 31 June 2022, a descriptive longitudinal study was conduc...
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Estimated foetal weight less than the 10th percentile at that gestational age is known as intra st st uterine growth restriction (IUGR). Over the period of 1 July 2021 till 31 June 2022, a descriptive longitudinal study was conducted in department of OBGY DVVPF’s medical college and hospital Ahmednagar. 90 women visiting OBGY OPD at DVVPF’s medical college and hospital Ahmednagar carrying single fetus with 32 completed weeks of gestation, having IUGR were included in the study. There are considerable differences between categories and within categories when umbilical artery Doppler indices were used to analyse newborn outcome in terms of birth weight. P value exceeded 0.0005. A better outcome in terms of birth weight of more than 2 kg occurs when the umbilical artery Doppler diastolic flow revealed strong forward diastolic flow. Planning the antenatal fetal surveillance requires the identification of IUGR fetuses caused by uteroplacental insufficiency. Doppler imaging of the umbilical artery reveals changes, which in turn forecasts the resistance present at the placenta. Increased prenatal mortality and morbidity are related to the absence or reversal of umbilical artery diastolic flow. Hence One of the most useful tools for performing prenatal fetal surveillance on IUGR fetuses is the umbilical artery Doppler.
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The ultrasonographic pattern of intestinal intussusception was studied in 19 young dogs with acute enteritis or gastroenteritis. The intussusception was observed to be a target-like mass consisting of a hyperechoic or anechoic cen...
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The ultrasonographic pattern of intestinal intussusception was studied in 19 young dogs with acute enteritis or gastroenteritis. The intussusception was observed to be a target-like mass consisting of a hyperechoic or anechoic center surrounded by multiple hyperechoic and hypoechoic concentric rings in transverse sections. In longitudinal sections, the intussusception appeared as multiple hyperechoic and hypoechoic parallel lines, as a tumor-like or pseudokidney mass, and as a trident-like configuration. Ultrasonography may provide a sensitive, specific, and accurate method of diagnosing intestinal intussusception in young dogs.
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The objective was to determine the accuracy of color Doppler ultrasound for diagnosis of early pregnancy in buffaloes based on the evaluation of corpus luteum blood flow (CLBF) on days 20 and 21 after mating. Local Egyptian buffal...
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The objective was to determine the accuracy of color Doppler ultrasound for diagnosis of early pregnancy in buffaloes based on the evaluation of corpus luteum blood flow (CLBF) on days 20 and 21 after mating. Local Egyptian buffaloes, (n=12) during 3rd and 4th lactational season were kept in the farm of Animal Reproduction Research Institute (ARRI). The animals were divided into two groups, group A (n=6) was mated naturally by a fertile bull during late estrus phase and group B (n=6) was left. Animals underwent grayscale ultrasonography (US) to locate the CL , then color flow Doppler and power Doppler were activated to evaluate CLBF and pulsed wave Doppler to evaluate uterine blood flow on days 1,5,10,12,14,16,18,19,20,21,23,25,27,30 after mating, using a portable, battery operated color Doppler and B-mode ultrasound scanner equipped with a 10-5MHz, rectal transducer (M-turbo, Fujifilm sonosite, USA). Based on subjective (visual) and objective (Doppler parameters) corpus luteum blood flow (CLBF) evaluation. Animals in group A were classified as pregnant or non- pregnant on day 20 and day 21 after mating depending on CLBF. Blinded from results of the previous diagnosis, we performed a final pregnancy diagnosis using US to visualize the fetal heartbeat on day 30 after mating. Blood samples were collected from jugular vein after examination to determine by ELIZA kits, serum estradiol and progesterone concentration. The final pregnancy outcome on day 30 was retrospectively compared with the CLBF on days 20 and 21 diagnoses and then classified as true positive, true negative, false positive, and false negative. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of the CLBF-d20- 21 test were calculated using specific equations. The CLBF decreased markedly on days 20-21 in case of non-mated group (CL regression), while it remained constant or slightly increased in case of pregnant animals. Moreover the uterine blood flow markedly increased in case of non-mated group during the same period.
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ObjectiveThe purpose of this study was to compare the feasibility of transrectal ultrasonography (TRUS) and color Doppler ultrasonography (CDUS) with transabdominal ultrasonography (TAUS) for the diagnosis of transitional cell car...
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ObjectiveThe purpose of this study was to compare the feasibility of transrectal ultrasonography (TRUS) and color Doppler ultrasonography (CDUS) with transabdominal ultrasonography (TAUS) for the diagnosis of transitional cell carcinoma (TCC) involving the distal ureter.
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The purpose of this study was to evaluate the feasibility of transrectal ultrasonography (TRUS) and color Doppler ultrasonography (CDUS) in differentiating malignant from benign distal ureteral obstructions.
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Objective. The purpose of this study was to determine whether hydrocele has any effect on the volume and shape of the ipsilateral testis and can be implicated as a cause of testicular ischemia. Methods. Group 1 consisted of 23 pat...
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Objective. The purpose of this study was to determine whether hydrocele has any effect on the volume and shape of the ipsilateral testis and can be implicated as a cause of testicular ischemia. Methods. Group 1 consisted of 23 patients with unilateral idiopathic hydrocele, whereas 30 healthy men constituted group 2. All patients underwent scrotal ultrasonography by which testicular dimensions in craniocaudal (Dcc), anteroposterior (Dap), and mediolateral axes were measured, followed by calculation of the Dcc/Dap ratio and testicular volume. By color Doppler analysis, the resistivity index of the subcapsular artery (RIsc) and the resistivity index of the intratesticular artery were determined. Results. The mean Dcc/Dap ratio ± SD for group 1 was 1.7 ± 0.3 (range, 1.1–2.3), significantly lower than that of group 2, which was 1.9 ± 0.3 (range, 1.3–2.2) (P = .028). Mean testicular volume values of subjects having hydrocele for more than and less than 6 months were 13.4 ± 7.3 and 22.5 ± 5.1 cm3, respectively; the difference between the subgroups was significant (P = .003). For the ipsilateral testis, mean RIsc values were 0.70 ± 0.06 (range, 0.60–0.80) in group 1 and 0.65 ± 0.06 (range, 0.59–0.83) in group 2. The mean RIsc was significantly higher in group 1 (P = .006). Conclusions. Unilateral idiopathic hydrocele has a tendency for rounding rather than flattening the ipsilateral testis as well as elevating the RIsc on the affected side. To the best of our knowledge, no strict spectral Doppler analysis criteria have been proposed for testicular ischemia yet. Therefore, the impact of the difference of the RIsc should raise the suspicion for ischemia, and further research is needed to elucidate any effect on spermatogenesis.
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ObjectiveThe purpose of this study was to verify whether high-resolution and color Doppler ultrasonography could distinguish schwannomas from neurofibromas.
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BACKGROUND AND PURPOSE: To study hemodynamic changes and to determine the value of contrast-enhanced transcranial color-coded sonography (TCCS) for the evaluation of dural arteriovenous fistulae (DAVF) before and after transcathet...
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BACKGROUND AND PURPOSE: To study hemodynamic changes and to determine the value of contrast-enhanced transcranial color-coded sonography (TCCS) for the evaluation of dural arteriovenous fistulae (DAVF) before and after transcatheter embolization. METHODS: Twenty-four patients (mean age 61+/-11 years) with occipitally located DAVF were studied with contrast-enhanced TCCS using the transtemporal bone window in transverse-axial and coronal insonation planes. Blood flow velocity measurements of all depictable basal cerebral veins and sinuses were obtained before and after transcatheter embolization. Pretreatment and post-treatment flow velocity values were compared. RESULTS: Four of the 24 patients (17%) could not be studied because of an insufficient temporal bone window. In all remaining patients (n=20), draining veins/sinuses could be identified because of pathologically increased blood flow velocities with peak systolic flow velocities of >50 cm/s. Of the 27 draining vessels depicted by DSA, TCCS correctly identified 25 (93%): the basal vein (3 of 3), the straight sinus (3 of 3), the superior sagittal sinus (1 of 3), the transverse sinus (9), the sigmoid sinus (4), and the superior petrosal sinus (5/5). However, TCCS failed to depict supplementary drainage via cortical veins. After transcatheter embolization, mean reduction of blood flow velocity was 44+/-18% (P<0.01) compared with pretreatment values. CONCLUSIONS: Contrast-enhanced TCCS is a promising technique for monitoring embolization of DAVF, follow-up after complete fistula occlusion, and may even be useful as a screening tool in patients with pulsatile tinnitus.
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The concept of neovascularization in tendinopathy seems to have gained nearly mythological proportions and quasi-religious state: it is considered of diagnostic and prognostic value, related to clinical outcome, and the exclusive ...
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The concept of neovascularization in tendinopathy seems to have gained nearly mythological proportions and quasi-religious state: it is considered of diagnostic and prognostic value, related to clinical outcome, and the exclusive target of some therapeutic interventions. However, we question whether these assumptions are based on scientific evidence, and we come to the conclusion that, in the light of recent well-performed research, it seems that detecting neovessels has no additional value for the diagnosis, no firmly confirmed prognostic value, and no proven relation with symptoms. The role of neovascularization in this field should be re-thought. Level of evidence V.
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