Ultrasound imaging has been used for performing single-injection peripheral nerve blocks and continuous catheters. One limitation with current technology is the inability to confirm the location of the needle or catheter tip. We describe a new needle and catheter design that permits distal tip visualization using color flow Doppler. An 18-gauge 100-mm insulated Tuohy needle and a 20-gauge 50-mm...

PURPOSE The aim of this experimental study was to evaluate whether the acoustic radiation force (ARF) is a potential source of twinkling artifacts in color Doppler images. METHODS Color Doppler images were obtained using a clinical ultrasonic scanner (Voluson e, GE Healthcare) for a high contrast (+15 dB) circular scattering phantom at pulse repetition frequencies (PRFs) ranging from 0.1 to 1...

....................................................................................................... 1 POPULÄRVETENSKAPLIG SAMMANFATTNING ................................. 3 LIST OF ORIGINAL PAPERS ........................................................................ 5 ABBREVIATIONS ............................................................................................. 6 INTRODUCTIO...

turkmen horse is one of the oldest and purest breeds in the world, but there is no information on doppler echocardiographic parameters in this horse. in the present study, pulsed-wave (pw) doppler echocardiography was performed on 42 clinically normal 3- to 15-year-old racing turkmen horses. no cardiac disease was detected with two-dimensional (2-d) real-time, m-mode, and colour flow mapping. d...

Pulmonary sequestration is a rare pulmonary parenchymal anomaly. The localization of the aberrant artery and its relation with sequestration are of importance in the process of diagnosis in the preoperative period. The feeding artery can be identified by color Doppler ultrasonography. We report two cases of pulmonary sequestration in two adolescents, aged 11 and 13 years old, and this report do...

This study was performed to validate echocardiographic and Doppler techniques for the assessment of left ventricular (LV) diastolic function in spontaneously hypertensive rats (SHR) and normotensive Wistar rats. In 11 Wistar rats and 20 SHR, we compared 51 sets of invasive and Doppler LV diastolic indexes. Noninvasive indexes of LV relaxation were related to the minimal rate of pressure decline...

Objective- To create three-dimensional model of the dog's liver vessels by using threedimensionalcolor Doppler ultrasonography which can be used for surgery planning,tumor detecting, transplantation, and other diagnostic or treatment project.Design- Descriptive studyAnimals- 6 mixed breed dog, 1.6-1.7 years old, 18-20 kg weightProcedures- The liver was found by two-dimensional scan initially th...

Purpose: The aim of our investigation is studying the quantitative indicators of the blood flow in LN of children and teenagers with the first discovered Hodgkin disease, non-Hodgkin’s lymphoma and BL on the base of the computer-aided processing the ultrasonic diagnostic images. Material and methods: Pathologically enlarged cervical lymph nodes were evaluated during the primary ultrasonic inves...

OBJECTIVE To show an artifact related to color Doppler flow imaging of the orbit. METHODS Three patients with strongly reflective structures in the orbit were selected from those routinely referred by clinicians for color Doppler ultrasonography of the orbit. Gray scale and color flow images were obtained with a 7.5-MHz linear array probe for a region with strongly reflective structures. A sp...

OBJECTIVE We report three cases of high-flow priapism in three young patients who presented erectile dysfunction after perineal trauma. METHODS Complete clinical evaluation, blood tests, color Doppler ultrasonography (US), arteriography and selective embolization were performed. RESULTS The clinical history and physical assessment were compatible with high-flow priapism. Color Doppler US sh...