View clinical trials related to Ultrasonography.
Filter by:Spinal anesthesia can be challenging in patients with lumbar scoliosis or previous lumbar spine surgery. This study aims to evaluate whether the use of the ultrasound-assisted spinal anesthesia reduces the number of passes required to successful dural puncture compared with the conventional surface landmark-guided technique in patients with abnormal spinal anatomy.
When performing vascular cannulation such as radial artery cannulation, ultrasonography (US) helps proper positioning of the tip of needle in the vascular lumen, which facilitating cannulation of the catheter and successful pressure monitoring. Conventionally, short-axis out-of-plane (SAX) and long-axis in-plane (LAX) views are commonly used method to image the target vessel during cannulation under US guidance. Dynamic needle tip positioning (DNTP) method is newly introduced by one group of investigators who conducted a related study using vascular phantom model. In DNTP, SAX is used, and additionally, when the needle tip is imaged in the screen as an echogenic point, the practitioner (a) proximally moves the US probe a bit, and then (b) the needle is advanced until the needle tip reappears in the screen. In this manner, the practitioner repeats (a) and (b) until the needle is inserted 1 cm into the lumen of vessel, and then the catheter is inserted to finish the procedure. DNTP has not been compared to conventional imaging methods. The aim of this trial is to see the effect of DNTP on success rate of the radial artery cannulation at the first attempt, compared to the conventional LAX.
Patients with acute respiratory failure (ARF) who were receiving mechanical ventilator support, had significant pleural effusion (both transudates and exudates) and drainage plan were evaluated. Decision to drain, timing and duration of drainage were made by primary physician according to the intensive care unit (ICU) protocols.The estimated amount of effusion (mL) was calculated as the maximum pleura-lung distance (mm) x 20 and significant effusion is accepted as ≥ 800 mL according to thoracic ultrasonography (USG) performed by the intensivist. The amount of effusion drained, mechanical ventilator parameters, arterial blood gas results and hemodynamic data were recorded before, at the 1st hour and at the end of drainage up to 30 days after drainage.
To compare safely and efficacy of intraprostatic injection of botulinum toxin A versus ethanol for treatment of benign prostatic hyperplasia (BPH).
The central venous catheters (CVC) related thrombosis is an issue of importance to ICU clinicians.This study conducts the daily ultrasound-screening for CVC-related thrombosis (DUCT).Its aim is to evaluate the characteristic and regularity of the central venous catheters (CVC) related thrombosis in ICU patients, and optimize the screening program of CVC-related thrombosis.
Multiple passes and attempts during spinal anesthesia might be associated with a greater incidence of paraesthesia, postdural puncture headache, and spinal hematoma. We hypothesized that the use of a preprocedural ultrasound-assisted paramedian technique for spinal anesthesia in patients with old age would reduce the number of passes required to entry into the subarachnoid space when compared with the landmark-guided paramedian approach. The study participants will be randomized into group L (landmark-guided) and group U (ultrasound-assisted). In group L, spinal anesthesia will be performed via paramedian approach using conventional landmark palpation technique. In group U, a preprocedural ultrasound scan will be used to mark the needle insertion site, and spinal anesthetic will be done via the paramedian approach.
The study contains the result from a comparison of diagnostic outcomes about lung collapse by using lung ultrasonography as a new diagnostic test compares to fiberoptic bronchoscopy as the standard test.
We plan to compare single person short axis view with two person long axis view
The aim of this research study is to describe the impact of rheumatologist performed ultrasound on the diagnosis and management pathways of patients with rheumatoid arthritis. Primarily, to compare the time from first visit to treatment initiation between patients with and without rheumatologist-performed ultrasound assessment.
Evaluate whether discrete landmarks of the proximal humerus can be identified using ultrasound in patients with various body habitus and BMI.