Search results for "ULTRASOUND"

Usability of photoplethysmography method in estimation of conduit artery stiffness

2011

Three channel photoplethysmography (PPG) signal waveform studies of leg conduit arteries during a provocative occlusion test were performed. PPG waveform second derivative amplitude ratio and arterial pulse wave velocity values showed significant correlations with ultrasound (US) reference method of local and regional arterial stiffness (AS), showing the ability to use PPG for AS change quantitative assessment.

Pulmonary Thromboembolism Diagnosed by Endobronchial Ultrasound

2013

GI/Liver/Biliary/Pancreas

2009

Chronic cerebrospinal venous insufficiency: current perspectives

2014

This review summarizes the research to date on chronic cerebrospinal venous insufficiency (CCSVI). CCSVI was initially defined as a clinical syndrome comprising stenoses of the internal jugular and/or azygos veins, characterized by collateral venous outflows and reduced cerebral blood flow, and was found primarily in patients with multiple sclerosis. However, the published evidence on CCSVI is very discordant. Catheter venography studies gave a regular picture, with the majority of patients with multiple sclerosis presenting with demonstrable outflow abnormalities in the veins draining the central nervous system. The prevalence of these lesions was over 50%, and even higher (about 90%) when…

SU-G-201-02: Application of RayStretch in Clinical Cases: A Calculation for Heterogeneity Corrections in LDR Permanent I-125 Prostate Brachytherapy

2016

Purpose: Tissue heterogeneities and calcifications have significant impact on the dosimetry of low energy brachytherapy (BT). RayStretch is an analytical algorithm developed in our institution to incorporate heterogeneity corrections in LDR prostate brachytherapy. The aim of this work is to study its application in clinical cases by comparing its predictions with the results obtained with TG-43 and Monte Carlo (MC) simulations. Methods: A clinical implant (71 I-125 seeds, 15 needles) from a real patient was considered. On this patient, different volumes with calcifications were considered. Its properties were evaluated in three ways by i) the Treatment planning system (TPS) (TG-43), ii) a M…

Towards clinical application of RayStretch for heterogeneity corrections in LDR permanent 125-I prostate brachytherapy

2017

Purpose RayStretch is a simple algorithm proposed for heterogeneity corrections in low-dose–rate brachytherapy. It is built on top of TG-43 consensus data, and it has been validated with Monte Carlo (MC) simulations. In this study, we take a real clinical prostate implant with 71 125I seeds as reference and we apply RayStretch to analyze its performance in worst-case scenarios. Methods and Materials To do so, we design two cases where large calcifications are located in the prostate lobules. RayStretch resilience under various calcification density values is also explored. Comparisons against MC calculations are performed. Results Dose–volume histogram–related parameters like prostate D90, …

ESRA19-0275 The efficacy and safety of ultrasound-guided superficial cervical plexus block (SCPB) in patient undergoing thyroid surgery: a case report

2019

Background and aims The SCPB provides effective anesthesia and analgesia for the head and neck region. CPBs can be performed more safely and accurately under ultrasound guidance, which is used to easily identify various important landmarks. This case report was carried out to assess the efficacy of SCPB in reducing the intra and postoperative use of opioids/analgesics to control pain due to thyroidectomy. Methods Case report: 45-year-old woman, ASA II, underwent left hemithyroidectomy under general anesthesia (sevoflorane 2% and remifentanil TCI 0.7–1 ng/ml). Ultrasound-guided left superficial cervical plexus block (SCPB) was performed using levobupivacaine 10 ml 0.25%. Pain score was measu…

Ultrasound in Varicose Vein Treatment

2014

Diagnosis is a prerequisite for all treatment strategies. Duplex ultrasound is the best diagnostic tool for varicose veins for all expressions of the disease (Nicolaides Circulation 102:126–163, 2000). All types of intervention on varicose veins have their own special demands on ultrasound. Ultrasound-guided vein mapping on the skin is very helpful prior to saphenous stripping (See Sect. 12.1), and it is absolutely indispensible for CHIVA (See Sect. 12.2). In endovascular thermal therapies (See Sect. 12.3) or foam sclerotherapy of trunk veins (See Sect. 12.4), ultrasound is an essential part of the treatment process. The actual procedures will only be explained here in relation to ultrasoun…

1583 Clinical and Ultrasound Examination after Unilateral Orchiopexy

2012

Aim To compare testis volume and ultrasound texture post unilateral orchiopexy with the other side. Methods Clinical re-examination and ultrasound measurement of testicle volume and echostructure were performed in 99 children after unilateral orchiopexy, performed between 2003 and 2007. Results Intraoperatively, 30 testis were described as hypoplastic. further 5 patients displayed pathologic funicular structures. On Follow-up clinical exam, 45 patients displayed a small or atrophic testis on the side of surgery. In 10 patients, the testis was described as bigger on the side of surgery. On ultrasound, 65 patients had similar pictures on the side of surgery compared to the other side. In the …

Sekundäre Achalasie bei niedrigmalignem Non-Hodgkin-Lymphom und Leiomyomatose der Kardia

2008

A 28-year-old man had been dysphagic for 9 months with a weight loss of 4 kg. A preliminary diagnosis of primary achalasia was made on the basis of typical radiological and manometric findings. Despite balloon dilatation of the cardia the symptoms did not improve and further diagnostic tests were performed. Ultrasound demonstrated a 4 cm tumour below the cardia. But its type and possible malignancy remained uncertain even at laparotomy. But as a malignant tumour was suspected a gastrectomy and omentectomy with removal of the local and regional lymph nodes were performed. After this the symptoms regressed and postoperative food intake was without problem. Histological examination of the surg…