View clinical trials related to Ultrasound.
Filter by:The purpose of this study is to assess validity of extended duplex ultrasound examination for diagnosis of proximal deep vein thrombosis performed by general intensive care unit nurses in the critically ill patients.
The objective is to validate the use of ultrasound measurements (urethral mobility, movement of the ano-rectal angle, elastography measurements) in women with urinary incontiennce before and after pelvic floor muscle training (PFMT) : inter and intra-observer reproducibility; correlation with clinical examination (modified Oxford scale); sensitivity to change before/after pelvic floor muscle training
The study aims to provide a timely update on the role of combining clinical and neuromuscular ultrasound assessments in diagnosis and follow-up of various muscle diseases in clinical practice over 12 months period, and correlating US findings with functional scales, biochemical and electrophysiological studies.
The objective of this study is: (1) to investigate the correlation of ultrasound parameters (SW speed, Dispersion slope, Attenuation value, Normalized Local Variance, Liver / Kidney Intensity Ratio) with the pathological parameters (fibrosis, intralobular inflammation, ballooning degeneration and steatosis); (2) to evaluate the diagnostic performance of SW speed for liver fibrosis, Dispersion slope for intralobular inflammation and Attenuation value for steatosis by comparison with the tissue diagnosis by liver biopsy.
Based on the ultrasound measurement of CSF/spinal cord ratio in neonates the investigators plan to define a normal range of CSF volume for 0-7 day old newborns. The investigators hypothise to be able to create an ultrasound measurement index/number to predict unsuccessful neonatalal LPs.
Endovascular abdominal aortic aneurysm repair (EVAR) aims to reduce the risk of aneurysm (AAA) rupture by reducing the blood pressure transmitted to the wall of the aneurysm. Aneurysms that remain pressurized despite EVAR may continue to grow, therefore requiring additional surgical interventions. The purpose of this study is to infer the reduction of pressure transmitted to the aneurysm wall by using intraoperative ultrasound ('M-Mode') to assess the pulsatility of the aneurysm wall. The hypothesis is that intraoperative reduction in aneurysm wall pulsatility after EVAR will correlate with improved aneurysm sac size reduction.
Rationale: Ulcerative colitis (UC) is remitting disease with a variable course. Predicting disease relapse after remission is important for the adjustment of medical treatment. Ileocolonoscopy is the best tool for doing this, but due to its invasiveness should be replaced by a method better accepted by the patient. Gastrointestinal ultrasound (GIUS) could be such a method.The PRELAPSE study will include UC patients who have been on maintenance anti-TNF therapy for at one year or more and in clinical remission for the 3 past months at least in two centres, Haukeland University Hospital and Ålesund Hospital. The infrastructure for recruiting these patients has already been established in the BIOSTOP study (Protocol ID no: HMR2016-0.6 and EudraCT (European Clinical Trials Database) no: 2016-001409-18). Objective: To study if GIUS or individual US parameters can predict endoscopic relapse at follow up examinations in a group of patients with ulcerative colitis in sustained clinical and endoscopic remission Study design: Prospective, longitudinal, explorative, observational multi-centric study for diagnostic accuracy Study population: Adult patients with histo-pathologically confirmed diagnosis of UC between 18 and 80 years of age that have entered the BIOSTOP trial (Trial number: EudraCT: 2016-001409-18) will be considered for inclusion in the proposed study. Intervention: All patients will be subjected to trans-abdominal gastrointestinal ultrasound and ileocolonoscopy. Blood and faeces samples will be collected at one time point for measuring relevant inflammatory markers. Main study parameter: Ultrasound measurements of the intestine of patients with ulcerative colitis Nature and extent of the burden and risks associated with participation, benefit and group relatedness: All patients will be examined repeatedly with gastrointestinal ultrasound (GIUS) and at certain time points with ileocolonoscopy or sigmoidoscopy. As all these procedures already are scheduled as a part of the BIOSTOP study the only extra burden for the patients will be the ultrasound examination. GIUS is a safe procedure that uses high frequency sound waves for the visualization of internal organs. The implementation of GIUS for the assessment of disease activity in UC patients might result in a reduced need for ileocolonoscopy, thereby reducing costs and the burden for patients. Compared to invasive endoscopic procedures GIUS can be performed without preparation, which is an advantage for the patients as treatment decisions can be made without delay. GIUS is also cheaper than ileocolonoscopy, causes little discomfort and has few or no complications.
The goal of this study is to assess the impact of perioperative point-of-care ultrasound (POCUS) assessment on patient-important outcomes (e.g. hospital length of stay, length of stay in recovery, mortality etc.) and perioperative patient management strategies, in patients undergoing non-elective non-cardiac surgeries.
Adult soft tissue sarcomas (STS) are rare tumours with an estimated incidence averaging 5/100 000/year in Europe. The prognosis of soft tissue sarcomas is dominated by local recurrence and distant metastasis. A link seems to exist between local recurrence and overall survival. Local recurrence occurs in approximately 16-29% of STS of the limbs. A combination of resection and radiotherapy is the optimal treatment of primary tumours according to histological grade and surgical result. Modern imaging techniques such as ultrasound (US), magnetic resonance (MR) and computed tomography (CT) are normally used to rule-out a recurrence in patients operated on for STS. However, none of this technique is perfect and different advantages and drawbacks have to be considered in choosing one or another technique. In the past, US was used in tumour follow-up to detect tumour recurrences, however these studies didn't use high-resolution transducers and the timing of imaging respect to surgery was not defined. The recent advances in transducer technology improved the diagnostic capabilities of US. For the evaluation of limbs soft-tissue masses, US is widely used as a first level modality. The reasons are that US is widely available, fast, easily repeatable and often more accessible than CT and MR Imaging. In addition, US equipped with high-frequency transducers have a spatial resolution that may be comparable or higher than that of MR Imaging and CT in the evaluation of superficial soft-tissues. US and MR Imaging are often not able to differentiate benign from malignant tumours, therefore several lesions detected with US or MR Imaging warrant biopsy. The clinical practice guidelines of the ESMO (European Society of Medical Oncology) published in 2010 found that there are no published data to indicate the optimal routine follow-up policy of surgically treated patients with localized disease. Moreover, it has not been demonstrated that, for limb sarcomas recurrences, MR Imaging is superior and cost-effective compared to US for the assessment of the primary site. Considering that surgically treated intermediate-/high-grade patient may be followed frequently, even every 3-4 months in the first 2-3 years and considering that performing US is easier than having MR Imaging, the purpose of this study is to evaluate the diagnostic performance of US in the detection of local recurrences of adults patients with soft tissue sarcomas of the limb.
Thousands of vein punctures are done every day at hospitals worldwide. Vein puncture are performed in connection with blood sampling, peripheral intravenous catheter (PIV) placement or blood donation. The predominantly used venous for blood withdraw are in the cubital region because in this area venous are most superficial placed and most often visible for the human eye. However, when using the usual blind landmark and palpation method in this region, it often proves exceedingly difficult or even impossible to obtain peripheral venous access on patients who are obese, chronically ill, hypovolemic or intravenous drug users. Various studies have shown that the success rate for establishing a vascular access with ultrasound compared to blind landmark technique is higher in patients with difficult access. When ultrasound is used to establish intravascular access, the prerequisite sterile puncture area can be challenging to meet due to ultrasound gel on the area and the fact that the ultrasound transducer cannot be wiped clean with alcohol after being in contact with a patient's skin or blood. A strict sterile procedure is important to reduce complications related to infection.The traditional way of coping with this is by covering the transducer and the wire in a long sterile sheet and using sterile gel. The sheet must be tight with rubber band around the transducer and pulled tightly around the transducer foot to prevent artefacts from appearing on the screen. This is an expensive and time consuming method, and it still leaves the problem with gel in the puncture area. The investigators have developed a method by where all these problems are solved by using, a slightly modified, commercial drape in combination with the Dynamic Needle Tip Positioning technique The investigators hypothesize that it is possible to perform ultrasound-guided venous puncture with a sterile and dry puncture area and that puncture can be performed proximal and distal to the traditional puncture side. It is a procedure presenting study that serves to demonstrate the feasibility of the method in ten healthy volunteers. The study will take place at Aarhus University Hospital, Skejby.