OBJECTIVE: We compared color Doppler velocity sonography and color Doppler energy sonography for the diagnosis of spermatic cord torsion in a canine model and determined the degree of torsion necessary to acutely halt testicular blood flow. MATERIALS AND METHODS: Spermatic cord torsion was created in five dogs by exposing and ...

OBJECTIVE: To evaluate the role of Doppler flow in the diagnostic process of ovarian torsion. METHODS: Twenty-two patients who displayed the clinical symptoms of abdominal pain concomitant with an ovarian mass and were scheduled for explorative laparoscopy were enrolled in the study. The cohort was divided into 3 groups: (A) ...

To test the impact of Joint Photographic Expert Group (JPEG) compression on the quantitative data encoded in color Doppler echocardiographic images, digital images from transesophageal echocardiography and an in vitro model of proximal flow convergence were analyzed before and after JPEG compression with compression ratios (CRs) as high as 65:1. ...

Endothelin-1 (ET-1), a well-known vasoconstrictor substance, is present in the testis but its functional role is unknown. The present study was undertaken to elucidate whether ET-1 may influence testicular blood flow. ET-1 (0.1, 1, 10, 100 ng), an ETA antagonist (BQ123; 0.01, 1, 100 micrograms), or saline were administered by ...

A new method for multiple, quantitative estimation of regional splanchnic blood flow is presented which overcomes all the limitations of the radionuclide microsphere technique. By direct comparison of two methods, i.e., simultaneous blood flow measurement with radionuclide-labeled and colored microspheres, it was shown that the quality of flow measure was ...

The causes of poor semen quality following spinal cord injury (SCI) are unknown. One possible mechanism is decreased testicular blood flow. Chronic testicular ischemia in non-SCI animals has been shown to have significant adverse impact on spermatogenesis. This study was designed to evaluate testicular blood flow following SCI in the ...

PURPOSE: To examine the effect of an ultrasound contrast medium (UCM), Infoson, on Doppler examination of stenotic arteries. METHODS: Stenoses were created in the common carotid artery of six piglets, and examined with spectral Doppler and color Doppler imaging during UCM infusion in the left ventricle. RESULTS: UCM caused a ...

Sixty-eight patients with thoracic lesions (48 with lung cancer and 20 with benign lesions) underwent color Doppler ultrasound (US) examinations. Of those, 21 patients (13 with lung cancer and eight with benign lesions) also received resections, and the correlation between color Doppler US signals and resected histologic specimens was evaluated. ...

OBJECTIVE: To evaluate the use of color-flow Doppler ultrasonography, a direct, noninvasive technique, for measurement of kidney blood flow in patients with systemic sclerosis (SSc). METHODS: Twenty-five normal volunteers and 25 SSc patients (median disease duration 8 years, range 2-21 years) were studied. All were free of clinical symptoms of ...

PURPOSE: To correlate the endosonographic and color Doppler flow imaging alterations observed in irradiated rectal cancers with the pathologic features of radiation response, and to evaluate the potential impact of altered blood flow on the integrity of the surgical anastomosis. METHODS AND MATERIALS: Endosonography with color and pulsed wave Doppler ...

Testicular microvascular blood flow is known to exhibit vasomotion, or pulsatile flow. In the present study we have used laser-Doppler flowmetry to study microvascular blood flow in the rat testis and to examine the response of the microvasculature to pharmacological stimulation and pathophysiological conditions. With a mean microvascular flow rate ...

PURPOSE: To determine the cause of unilateral dilated tortuous episcleral vessels in a 34-year-old patient. METHODS: The patient underwent slit-lamp examination, visual field testing, tonographic measurement, orbital ultrasound examination, orbital color Doppler blood flow measurement, dye-enhanced computed topographic scan, and selective carotid angiography. RESULTS: Disk cupping and early scotoma were ...

We measured regional blood flow in synovial tissue of the antebrachiocarpal, midcarpal, and metacarpophalangeal joints of six normal adult anesthetized horses by using 15-microns-diameter polystyrene colored microspheres. The midcarpal fibrous capsule and synovial membrane blood flows (SMBF) were compared, and the effect of increased intra-articular pressure (30 and 60 mmHg) ...

The aim of the present study was to compare the diagnostic accuracy of transvaginal sonography, color flow imaging, and serum CA 125 assay in pre- and postmenopausal women undergoing laparotomy for a clinical diagnosis of an adnexal mass. In 109 consecutive women, the morphology of the mass was evaluated with ...

RATIONALE AND OBJECTIVES: We examined whether the intravenous (IV) Doppler ultrasound contrast agent SHU 508 would improve the detection of reduced perfusion of rabbit testes when normal flow was otherwise difficult to detect. METHODS: Seventeen anesthetized prepubertal rabbits underwent random unilateral spermatic cord ligation and a contralateral sham operation. Immediate, ...

Clinical assessment of the testicular torsion and epididymoorchitis is inherently difficult. Inadequate clinical information may prevent differentiation testicular torsion from non-surgical condition. We reported 3 cases with symptoms of acute scrotal condition who had received color Doppler sonography. One man had epididymoorchitis and color Doppler sonography showed profusely increased blood ...

PURPOSE: Pathologies like varicocele and testicular torsion are known to alter testicular blood flow, either acutely or chronically. The present study was undertaken to determine whether or not alterations in testicular vascular permeability accompany these changes in testicular blood flow. MATERIALS AND METHODS: Testicular vascular permeability was examined by determining ...

PURPOSE: To compare power Doppler ultrasonography (US) with standard color Doppler US in the evaluation of testicular and epididymal blood flow in children. MATERIALS AND METHODS: Testicular and epididymal flow were analyzed retrospectively in 24 testes in 12 prepubertal boys (mean age, 4 years) and 49 testes in 25 postpubertal ...

PURPOSE: To determine whether ultrasonography (US) can be used to differentiate inflammatory from ischemic bowel wall thickening. MATERIALS AND METHODS: Thirty-five patients (aged 23-96 years) with inflammatory or ischemic bowel wall thickening underwent US. Thickness was recorded, echotexture categorized, color Doppler flow graded, presence of intramural arterial signal recorded, and ...

To ascertain the factors related to the transesophageal echocardiographic diagnosis of patent foramen ovale, the primary echocardiographic data were reviewed from 74 patients with that diagnosis. Similar detection rates were observed with contrast echocardiography (82%) and color flow mapping (78%), but contrast was more sensitive in patients with normal-sized atria ...

OBJECTIVES: This study was designed to assess the accuracy of a new Doppler method for quantification of volumetric flow in vivo. BACKGROUND: Noninvasive assessment of volumetric flow through heart valves and the great vessels remains a clinical goal. We present a new method for quantification of volumetric flow based on ...

Digital rectal examination, prostate-specific antigen and transrectal sonography (TRS) are the main diagnostic tools for evaluating men at risk for carcinoma of the prostate (PCa). PCa has a hypoechoic echo pattern via TRS in 60- 85% of cases. Hypoechoic areas are observed, however, in benign prostatic hyperplasia (BPH) as well. ...

PURPOSE: To establish the feasibility of determining changes in regional cerebral blood flow using amplitude-mode color Doppler ultrasound in the newborn lamb. METHODS: Regional cerebral blood flow was modified by intrastriatal injection of N -methyl-D-aspartic acid (NMDA) in two newborn lambs and compared with that in a control animal receiving ...

A cross-sectional study was performed in 85 low-risk singleton first trimester pregnancies to assess corpus luteum blood flow during this period. Gestational age, established by measuring crown-rump length, ranged from 6 to 12 weeks. All cases were studied by transvaginal color velocity imaging and pulsed Doppler ultrasonography. After corpus luteum ...

The effects of 5-hydroxytryptamine (5-HT), 5-HT2 receptor antagonists (ritanserin and ketanserin), histamine and substance 48/80 on testicular blood flow and microcirculation were studied in adult rats. The substances were administered by topical application on the testicular surface and by intratesticular injections, and blood flow was measured by radioactive microspheres and ...

Power Doppler sonography is a new technique that displays the strength of the Doppler signal in color, rather than the speed and direction information. It has three times the sensitivity of conventional color Doppler for detection of flow and is particularly useful for small vessels and those with low-velocity flow. ...

PURPOSE: The purpose of this study was to characterize the hemodynamic changes in the contralateral testis during acute spermatic cord torsion in anesthetized rats. MATERIALS AND METHODS: We used videomicroscopy to examine the microcirculation of the contralateral testis following acute torsion. Specifically, we examined the effect on vasomotion, a rhythmic ...

PURPOSE: To evaluate the ability of power Doppler ultrasonography to depict changes in renal perfusion after pharmacologic manipulations. MATERIALS AND METHODS: Six domestic swine were intubated and anesthetized. The right renal artery was catheterized for injection of epinephrine (100 micrograms) and papaverine (2 mg/kg). Intraarterial blood pressure, heart rate, and ...

The aim of this experimental study in rats was to consider the supplementary role of an omental pedicle flap on the neovascularization of the testicle through the spermatic vessels, for which a Fowler-Stephens procedure had been planned. To compare results, 12 animals had only the spermatic vessels ligated, without an ...

Transthoracic dynamic 3-dimensional reconstruction of the heart with tissue depiction has been proved to be feasible when using various methods of data acquisition. The same method can theoretically be applied to color Doppler flows to generate dynamic 3-dimensional images of intracardiac blood flow jets. To explore the feasibility of this ...

PURPOSE: Pathologic studies have suggested that periventricular intraparenchymal hemorrhages (IPH) occur as the result of compression and occlusion of terminal veins (TV) by germinal matrix hemorrhages (GMH). This study used color Doppler ultrasound techniques to test this hypothesis in vivo. MATERIALS AND METHODS: Twenty-four infants with 32 intracranial hemorrhages (20 ...

The prenatal diagnosis of tetralogy of Fallot (TOF) can be difficult, as the routine sonographic four-chamber view may be normal before birth. Unlike the normal fetus, in which blood flows adjacent to the left side of the interventricular septum, on color Doppler mapping a fetus with TOF also demonstrates antegrade ...

PURPOSE: To determine the color Doppler sonographic characteristics and clinical relevance of persistent needle tracts after femoral arterial puncture. MATERIALS AND METHODS: After diagnostic (n = 18,825) or interventional (n = 8,489) cardiac catheterization, 1,327 color Doppler sonograms of the groin were obtained over a 54-month period. Gray-scale images, color ...

PURPOSE: We determined the shortcomings of color Doppler sonography for the diagnosis of testicular torsion. MATERIALS AND METHODS: We reviewed 5 cases of testicular torsion in which findings on color Doppler sonography were inconsistent with surgical findings. RESULTS: Color Doppler sonography showed blood flow in 2 patients who had necrotic ...

A total of 96 women undergoing in vitro fertilization (IVF) treatment were studied on the day of human chorionic gonadotropin (hCG) administration by transvaginal ultrasonography with color and pulsed Doppler ultrasound. We assessed endometrial thickness, endometrial morphology, presence or absence of subendometrial or intraendometrial color flow, intraendometrial vascular penetration and ...

BACKGROUND: Ultrasonic Doppler color flow mapping was applied to detect urinary flow in this study. The purpose of the study was to provide fresh insight into urodynamic and functional studies of the kidney and ureter. METHODS: Ultrasonic Doppler color flow mapping was performed from the abdominal surface to detect the ...

After single stage Fowler-Stephens orchiopexy testicular atrophy is common. Previous experimental study in the scrotal testis of the adult rat has shown that ligation of the internal spermatic artery often causes focal testicular infarction or atrophy and exogenous human chorionic gonadotropin increases testicular blood flow. We questioned whether division of ...

Subjective reporting of the color of blood passed per rectum has been used to predict the location of gastrointestinal bleeding, but the validity of this clinical approach has never been evaluated systematically. In this study we determined the spectrum of patient and physician descriptors used to characterize the color of ...

The purpose of this study was to describe the color Doppler sonographic findings in adnexal torsion that distinguish viable from nonviable ovaries. We present the color Doppler sonographic features in 13 patients with surgically proved adnexal torsion that help determine whether or not the ovaries were viable or nonviable at ...

BACKGROUND: This study was designed to evaluate radiation-induced changes in tumor blood flow by color Doppler ultrasonography. METHODS: Color Doppler examination was performed on 14 patients with advanced cervical carcinoma treated with external radiotherapy. The total dose of radiation varied from 30 to 65 Gy and was given as 1.9 ...

This study was undertaken as a phase I, placebo controlled, nonblinded investigation of the safety and efficacy of topical prostaglandin-E1 for the treatment of erectile dysfunction. Nine men with erectile dysfunction secondary to spinal cord injury and 1 man with mild arterial insufficiency were enrolled in the trial and underwent ...

The purpose of this study is to examine prospectively the efficacy of intraoperative transesophageal echocardiography (TEE) monitoring in reducing the incidence of residual ductal flow during video-assisted thoracoscopic (VATS) patent ductus arteriosus (PDA) interruption. Thirty consecutive patients undergoing PDA interruption via the VATS procedure were monitored with an appropriately sized ...

Anaesthetized adult rats were exposed repeatedly to cigarette smoke for 2 s interspersed with exposure to fresh air for either 10, 15 or 30 s using a smoking apparatus. The acute effects of this treatment on testicular microcirculation were studied using laser Doppler flowmetry. Peripheral tissue O2 saturation was measured ...

BACKGROUND: Much evidence has suggested that vascular density reflects the clinical behavior of cancer. In this study, the intratumoral blood flow in cervical carcinomas was assessed by transvaginal color Doppler ultrasound, and its clinical significance was evaluated. METHODS: Sixty-five patients with Stage Ib-IIb cervical carcinoma exhibiting visible cervical tumor by ...

Acute mitral regurgitation is a medical emergency that requires prompt, accurate diagnosis and urgent therapy. Although the use of echo Doppler imaging has been described in these patients, preliminary observations have suggested that color flow Doppler performed from the standard transthoracic windows may underestimate the severity of mitral insufficiency in ...

Transcranial duplex color-flow sonography provides visualization of intracranial structures, and measures angle-corrected blood flow velocity in the basal cerebral arteries of adults. In 44 patients with central nervous system disease, the oblique diameters of the third and the middle part of the lateral ventricle were measured by transcranial duplex color-flow ...

OBJECTIVES: To assess the usefulness of color Doppler ultrasound in evaluating the newborn with suspected antenatal testis torsion. METHODS: Nine newborns with 10 antenatally torsed testes were examined using color Doppler and gray-scale ultrasound. RESULTS: Each examination revealed lack of intratesticular blood flow on the affected side and normal flow ...

The safe use of transvaginal sonography in patients with placenta previa has been confirmed, and has revolutionized precise placental localization. The aim of our study was to evaluate the efficacy of transvaginal sonography and color-coded blood flow in the prediction of placenta accreta. Twenty-one patients with persistent placenta previa were ...

The differentiation between a pseudocystic solid tumor and a fluid collection containing echoes is sometimes difficult. The purpose of this study was to evaluate the contribution of color Doppler sonography in confirming the solid nature of pseudocystic malignant tumors by demonstrating internal vascularity. Fourteen consecutive masses with an indeterminate solid ...

Endovaginal color Doppler flow imaging is a relatively new technique that combines gray-scale sonography with duplex Doppler and color Doppler flow techniques. However, such imaging is associated with multiple pitfalls. Technical errors are caused by improper setting of the color flow parameters. The color velocity scale, color priority, color gain, ...