Our objective was to characterize tubal abnormalities with color Doppler ultrasonography. We evaluated 25 women with adnexal masses suggestive of tubal masses using gray scale sonography. Color Doppler flow was added to further characterize the adnexal lesion. Of 18 women diagnosed as having hydrosalpinx, in 6 cases the diagnosis was ...

The aim of this study was to quantify the anatomic and hemodynamic components of the testicular venous drainage for the purpose of understanding their mechanisms of interacting in producing mutual effects, such as "nutcracker" phenomenon, reflux, and varicoceles. Seventy-five male subjects were studied at rest and during Valsalva maneuver. Aortomesenteric ...

BACKGROUND: Conventional 2-dimensional Doppler large vessels are prone to inaccuracy. Three-dimensional (3D) volume imaging provides the opportunity to make cross-sectional flow calculations through digital spatiotemporal integration of flow velocity, area, and profile. METHODS: A new digital 3D color Doppler reconstruction method was used to generate radially acquired flow data sets. ...

The effects of unilateral testicular torsion on the blood flow of the contralateral testis were investigated. Fourteen adult male dogs were recruited. Seven dogs underwent unilateral testicular torsion of 4 h duration, and the other seven dogs had a control operation. Testicular blood flow was determined by colour Doppler ultrasonography ...

Chromated-copper-arsenate (CCA) is a compound used worldwide for wood preservation. Occupational hazards from chronic exposure to CCA are well known, but acute ingestion of CCA wood preservative is very rare. We describe a case of suicide by ingestion of a CCA wood preservative. A 33-year-old man attempted suicide by ingesting ...

Thrombosis of the superior vena cava (SVC) is an important clinical problem that requires prompt diagnosis. Confirmation of suspected SVC syndrome requires the use of an imaging study to document the obstruction and presence of collateral venous channels. Echocardiography is often used to evaluate suspected SVC obstruction; however, previous methods ...

The use of 2,2'-azino-di-[3-ethylbenzthiazolinesulfonate(6)] diammonium salt (ABTS) for the enhancement of fingerprints in blood has been investigated. Optimal pH conditions and H2O2 concentrations have been determined using UV/Vis spectroscopy. ABTS is an effective and safe noncarcinogenic (though more expensive) alternative to the presently used 3,3'-diaminobenzidine (DAB) for the development of ...

PURPOSE: We determine whether the chronic prostatitis/pelvic pain syndrome is associated with abnormal prostate blood flow. MATERIALS AND METHODS: We used color Doppler ultrasonography to examine 53 patients with inflammation, 80 men without inflammation and 22 healthy controls. Images were recorded and scored using standardized criteria to characterize the degree ...

The feasibility of reliably measuring clitoral blood flow using standard color Doppler ultrasonography was evaluated by two independent assessors in a sample of 40 pre- and post-menopausal women. High positive correlations with no significant mean differences between examiners were found for three major standard blood flow measures including maximum velocity, ...

AIM: To analyze the usefulness of color Doppler flow imaging in the differentiation of benign and malign ocular tumors. METHODS: Blood flow in tumor and ocular blood vessels was assessed by color Doppler flow imaging in 20 patients with malignant melanoma of the uvea and 19 patients with cavernous hemangioma. ...

OBJECTIVE: The purpose of this study was the characterization of normal and abnormal third stage placental separation using gray scale and color Doppler sonography. METHODS: The third stage of labor was examined in 62 patients using gray scale and color Doppler sonography. After identification of placental basal plate vessels by ...

Acoustic stimuli are being reported as a cause of changes in resistance in the basilar artery (BA). It was the aim of this study to investigate this effect under standardized conditions dependent upon the intensity of the evoking stimulus. Twenty healthy subjects with normal hearing (male/female 14/6; mean age 26.4 ...

Although varicoceles are common in adolescence, the indications for surgery as well as the procedure of choice are controversial. We have evaluated the use of color Doppler ultrasound (CDUS) as an objective tool in the assessment of such patients in a 5-year prospective study for determination of varicocele size, venous ...

Real-time, 3D color Doppler echocardiography (RT3D) is capable of quantifying flow at the LV outflow tract (LVOT). However, previous works have found significant underestimation for flow rate estimation due to finite scanning time (ST) of the color Doppler. The authors have, therefore, developed a mathematical model to correct the impact ...

This report concerns the antenatal visualization and velocimetry of an arterioarterial and a venovenous anastomosis in a monochorionic twin pregnancy using color Doppler sonography. The phenomenon of 'interference beating' occurs when two flow velocity waveforms are superimposed in one blood vessel. This characteristic image can be generated antenatally to confirm ...

The bases of the left and right aortae in snakes are joined by the interaortic foramen. Previous anatomical and physiological studies have raised the possibility of blood flow through this foramen playing an important role in the redistribution of blood throughout the body, particularly during periods of hemostatic stress. Echocardiography ...

Temporal variations in microcirculatory blood flow in the testis and blood pressure were examined in intact, pentobarbital-anesthetized rats with a two-channel laser Doppler flowmeter. The laser Doppler probes that measure local blood flow in a tissue volume of about 2 mm3 were placed either over the mid portion of the ...

We investigated the capability of color Doppler sonography in evaluating acute osteomyelitis in children. Twelve children suspected of having osteomyelitis were evaluated with color Doppler ultrasonography at admission and at regular intervals to observe the inflammatory process of osteomyelitis, determine the response of antibiotic therapy, and predict the need of ...

OBJECTIVE: The purpose of this study was to determine the effect of gallbladder contraction on the conspicuity of flow in the normal gallbladder wall. SUBJECTS AND METHODS: Ten healthy adult volunteers without clinical evidence of gallbladder disease participated in the study. After patients fasted overnight, the gallbladder was scanned using ...

OBJECTIVE: To assess the relationships among perifollicular blood flow; follicular fluid pO2, pCO2, and pH; oocyte developmental capacity; preimplantation embryo quality. DESIGN: Prospective study. SETTING: Academic, tertiary care institution. PATIENT(S): Unselected, gonadotropin-stimulated IVF cycles. INTERVENTION(S): Color, pulsed Doppler analysis of perifollicular blood flow, and follicular pO2, pCO2, and pH determinations ...

AIM: To investigate the possible role endothelin may play in the pathogenesis of varicocele and varicocele-induced infertility. METHODS: In varicocele patients, radioimmunoassay is used to determine the blood endothelin concentration in the spermatic vein and the antecubital vein separately. RESULTS: The blood endothelin concentration of the spermatic vein (66.8 +/- ...

We investigated the diagnostic utility of ultrasonography in the diagnosis of internal jugular venous ectasia. Eight children (six boys, two girls) were recruited into this prospective study. Sonography of internal jugular venous ectasia in these patients revealed fusiform dilation of the internal jugular vein, and the possibility of thrombus and ...

In order to assess mean diameters and blood flow velocities (BFV), Color Doppler Flow Imaging (CDFI) of vertebral arteries (VA) was performed. Five hundred and ninety six persons without carotid disease or symptoms related to vertebrobasilar system were analyzed by CDFI of VA. Mean right VA diameter was 3.37 +/- ...

OBJECTIVES: To evaluate the effect of varicocele on testicular blood flow and expression by Sertoli cells of transferrin and androgen-binding protein (ABP), to determine whether varicoceles impair Sertoli cell function. METHODS: Experimental varicocele was established in male Sprague-Dawley rats by partial ligation of the left renal vein. The control group ...

BACKGROUND/PURPOSE: Unilateral testicular torsion is known to cause infertility because of damage to the contralateral testis. Testicular damage has been attributed to many different mechanisms, one of which is altered contralateral blood flow. In our experiment, in an effort to identify the reason for contralateral testicular injury, the authors developed ...

Pituitary adenylate cyclase-activating polypeptide (PACAP) is synthesized in developing germ cells in the testis and may act as a paracrine modulator of spermatogenesis and/or participate in tubule-interstitial interactions. Despite the abundance of PACAP in the organ, its role in testicular function has not yet been studied in vivo. Using laser ...

PURPOSE: Our objective was to evaluate the differences between leiomyoma and adenomyosis by color Doppler sonography with new criteria. METHODS: A total of 78 patients with symptomatic uterine nodularities who were sonographically suspected to have leiomyoma or adenomyosis without other coexisting pathologic conditions was enrolled in the study. All patients ...

OBJECTIVE: The purpose of this study was to investigate whether fatty sparing adjacent to the gallbladder fossa is related to efferent blood flow from the gallbladder wall. SUBJECTS AND METHODS: Color and power Doppler sonography were performed in 80 patients with a fatty liver that appeared as a fine echogenic ...

BACKGROUND/PURPOSE: Infertility occurs in 25% of patients after unilateral testicular torsion; hence, the authors examined hemodynamic and histological changes in both testes after acute testicular torsion in neonatal piglets. METHODS: The animals were anesthetized, intubated, ventilated, catheterized, and assigned randomly to a sham group or one of three experimental groups ...

A chronic, large thrombus in the right main pulmonary artery (PA) was detected in a 54-year-old woman with a history of surgical repair of atrial septal defect. Color flow imaging revealed a prominent red signal along the right border of the markedly dilated PA. Pulsed Doppler echocardiography showed that the ...

The aim of this study was 1) to investigate the validity of repeated estimations of blood flow using colored microspheres (CMS) and 2) to develop and validate a method that permits four consecutive estimations in the same animal using nonradiolabeled microspheres (NRMS). Several mixtures of different types of microspheres were ...

RATIONALE AND OBJECTIVES: To determine the capacity of color and spectral Doppler ultrasonography (US) to quantify angiogenesis in vivo and to characterize low-resistance intratumor blood flow. METHODS: Thirty-two tumors, xenografted into mice, were studied with Doppler US. The number of intratumor vessels visualized with color Doppler US was compared with ...

PURPOSE: The aim of the study is to determine blood flow and resistance parameters (Resistance Index-RI, Pulsatility Index-PI) in the retrobulbar arteries of patients suffering from amaurosis fugax. METHODS: Color Doppler velocity was used to measure blood flow velocity and vascular resistance in the ophthalmic artery, central retinal artery and ...

A six-month-old Pomeranian was referred for evaluation of cyanosis. The puppy had been cyanotic since it was acquired at six weeks of age, but otherwise appeared normal. Diagnostics were aimed at the most common causes (i.e., congenital defects in the cardiovascular and respiratory systems) of cyanosis in a juvenile animal. ...

Amplitude-coded color Doppler sonography (ACD) has become an useful adjunct to gray-scale US and conventional color Doppler sonography (CD) for the assessment of vascular diseases and pathologic conditions that might affect or alter tissue vascularization or perfusion. Basically, all US units that generate conventional color Doppler information through autocorrelation technique ...

BACKGROUND: Colour Doppler sonography (CDS) has become the procedure of choice in evaluating testicular perfusion but false negative findings have been reported. OBJECTIVE: To determine if direct visualisation of the twisted spermatic cord using high resolution US is a reliable sign to assess testicular torsion. MATERIAL AND METHODS: Thirty patients ...

In a prospective study, 200 healthy female breasts were examined using color Doppler sonography to study the detectability and the resistive indices (RIs) of arterial vessels. In each breast, we attempted to detect two to three vessels and recorded the frequency spectrum with RI of each vessel. Blood vessels (n ...

PURPOSE: We evaluated the hemodynamic effects of transurethral alprostadil in 21 patients with erectile dysfunction using color duplex ultrasonography. MATERIALS AND METHODS: Penile arterial diameter, peak flow velocity and end diastolic velocity were compared following intraurethral administration of 500 microg. alprostadil and intracavernosal injection of 10 microg. alprostadil. RESULTS: A ...

OBJECTIVE: The purpose of this study was to evaluate the changes of blood flow of the submandibular gland in comparison with salivary secretion after gustatory stimulation through use of color Doppler sonography. STUDY DESIGN: High-frequency color Doppler sonography was performed on 30 healthy volunteers, aged 22 to 31 years. The ...

Neuropeptide Y (NPY) receptors have recently been described in intratesticular arterioles, but the role of NPY in testicular blood-flow regulation has not been examined. To explore this, we administered NPY in various doses (0.01-10 microg) via intratesticular injections and studied testicular microcirculation using a laser Doppler flow meter. NPY injection ...

Testicular infarction is most commonly associated with acute testicular torsion. We present the sonographic findings in a case of segmental testicular infarction associated with epididymitis. The gray-scale abnormalities included a round, well-defined, hypoechoic intratesticular mass and heterogeneity and enlargement of the epididymis. Color Doppler sonography demonstrated only minimal blood flow ...

The ultrasonographic appearance of splenic torsion has been described; the splenic parenchyma can be normal, hypoechoic or anechoic with interspersed linear echoes (coarse/"lacy" appearance). The ultrasonographic parenchymal appearance of 15 dogs in this report with splenic torsion varied: mottled hypoechoic regions (n=2), diffusely hypoechoic (n=11) and normal (n=2). Because splenic ...

Color Doppler ultrasound was used transrectally in 6 mares to locate both the left and right Aa. uterinae and to obtain flow velocity waveforms at defined times (Days 0, 5, 10, 15 and 20) during 4 estrous cycles. Blood flow reflected by the resistance index (RI) was determined for both ...

BACKGROUND: Ovarian hemangioma is extremely rare. CASE: We report a case of a 32-year-old woman who complained of pelvic pain due to a large right adnexal mass. On color Doppler sonography the mass showed very rich and complex vascularity, with prominent blood flow. A 10 x 8-cm hemangioma of the ...

PURPOSE: To describe a feasibility study in a sheep model using an intravascular ultrasound (IVUS) instrument in an intravenous position to produce color flow, B-mode images of arterial segments along with Doppler blood flow velocities. METHODS: Four healthy adult male sheep were anesthetized for surgical exposure of the right external ...

OBJECTIVE: We assessed the feasibility of contrast-enhanced color Doppler, power Doppler, and spectral duplex sonography for visualization and quantification of flow through transjugular intrahepatic portosystemic shunts (TIPS) in patients in whom the baseline sonographic evaluation was unsatisfactory. SUBJECTS AND METHODS: Thirty-three patients underwent color Doppler, power Doppler, and spectral duplex ...

The uteroplacental circulation of the cynomolgus monkey was examined in early pregnancy using a high-resolution ultrasound scanner. Intravenous injection of an echo-contrast agent, Albunex (sonicated albumin), was used to enhance the color Doppler images obtained. The flow of blood into and out of the intervillous compartment was readily assessed and ...

The purpose of this study was to assess the diagnostic value of ultrasonography for the detection of twisted vascular pedicle in ovarian torsion and to verify whether the blood flow alterations in the twisted vascular pedicle on color Doppler sonography can predict the viability of adnexal structures. In 28 of ...

Color Doppler sonographic detection of tumor flow within superficial melanoma metastases was investigated to determine if tumor size, vessel size, or vessel number influences signal detection. Color Doppler imaging of 32 pathologically proved melanoma metastases was performed at 6 MHz with color Doppler imaging parameters optimized for each lesion scanned. ...

The aim of this study was to evaluate the ability of power Doppler sonography to distinguish between hypoechoic fluid and synovium in patients with suspected tenosynovitis. Gray scale sonography and power Doppler sonography were performed on 26 tendons in 24 patients with tenosynovitis and 30 tendons in five asymptomatic volunteers. ...