View clinical trials related to Ultrasound.
Filter by:The American Society of Anesthesiologists (ASA) does not specify a fasting period for patients with certain comorbidities, such as diabetes, for elective surgery, and does not make a separate recommendation for surgery. The European Society of Anesthesiology (ESA) guidelines do not differentiate between diabetic patients and normal patients. Aspiration of gastric contents is a common cause of perioperative morbidity and mortality. Aspiration can cause hypoxia, bronchospasm, pneumonia, acute respiratory distress syndrome and death. The presence of food or fluid in the stomach before induction of anesthesia is one of the greatest risk factors for perioperative pulmonary aspiration. Sedation and general anesthesia suppress or inhibit physiologic mechanisms (tone of the lower esophageal sphincter and upper airway reflexes) that protect against aspiration. Because restriction of fluid and food intake before general anesthesia is vital for patient safety, Anesthesiology societies have developed guidelines for preoperative fasting. Current ASA guidelines recommend at least 2 hours fasting for clear liquids, 6 hours fasting after a light meal (toast and clear liquids) and 8 hours fasting after a high calorie or fat meal. The information obtained from gastric ultrasound allows anesthesiologists to determine the optimal timing of procedures, type of anesthesia and airway management technique.
Spinal anesthesia is frequently administered using the conventional landmark technique. Ultrasound is a non-invasive and safe approach. Neuroaxial anesthesia procedures can be conducted using two different ultrasound techniques; Real-Time Ultrasound Guided (USRTG) and Ultrasound-Assisted (USAS). The primary objective of this study is to compare the successes of spinal anesthesia applications using USRTG, USAS, and conventional landmark techniques on the first attempt in obese patients undergoing orthopedic surgery.
The aim of this work to compare between the efficacy of ultrasound guided TAP block with dexamethasone as an adjuvant versus ultrasound guided TAPB with methyl prednisolone as an adjuvant to local anesthetic for postoperative pain management in lower abdominal hysterectomy procedures.
The aim of this pilot study is to develop a feasible and quantifiable ultrasonographic method to grade the severity of adenomyosis and to determine the interobserver variation.
The aim of this study is to compare laparoscopic -assisted, ultrasound-guided transversus abdominis plane block and laparoscopic intraperitoneal instillation of local anesthetic in pediatrics undergoing inguinal hernia repair.
The use of lung ultrasound is instrumental in the evaluation of many chest pathologies and its ability to detect pleuro-pulmonary pathology is widely accepted. However, the use of ultrasound to explore the state of the peripheral lung parenchyma, when the organ is still aerated, is a relatively new application. Horizontal and vertical artifacts are separate and distinct artifacts that can be seen during ultrasound examination of the lungs. While the practical role of lung ultrasound artifacts is accepted to detect and monitor many conditions, further research is needed for the physical interpretation of ultrasound artifacts. These artifacts are diagnostic signs, but we don't fully understand their origin. The artifactual information deriving from the surface acoustic interaction, beyond the pleural line, in the ultrasound images of the normally aerated and non-deflated lung, represents the final result of complex interactions of acoustic waves with a specific three-dimensional structure of the biological tissue. Thus, the umbrella term "vertical artifacts" oversimplifies many physical phenomena associated with a pathological pleural plane. There is growing evidence that vertical artifacts are caused by physiological and pathological changes in the superficial lung parenchyma. Therefore, the need emerges to explore the physical phenomena underlying the artifactual ultrasound information deriving from the surface acoustic interaction of ultrasound with the pleuro-pulmonary structures.
The goal of this clinical trial is to prospectively evaluate the potential benefits of injections with Augmented Reality enhanced Ulrasound versus standard Ultrasound or fluoroscopy participants where assigend for fluoroscopic joint injections oder for Ultrasound guided injection. The main question[s] it aims to answer are: - The primary objective is to evaluate the duration of the different interventions - the count of needle passes - assess the reduction of radiation exposure using AR US rather than fluoroscopic guidance for joint injections
This study aims to evaluate the ultrasonographic parameters (distance from skin to epiglottis (DSE) and distance from skin to vocal cords (DSVC)) as preoperative predictors of difficult laryngoscopy in non-suspected difficult airway patients undergoing elective surgery.
The aim of this study is to early detect kidney disease in the natural population cohort of children by urine and ultrasound screening, to assist in the precise prevention and treatment of children's kidney disease, and to establish a risk prediction system for children's kidney disease. About 10,000 children called KunQi Cohort are born in Jiangsu Province(8,000 in Kunshan and 2,000 in Qidong) and about 3,000 born in Shanghai. Through the project, child who is found with abnormal urine or ultrasound result will be referred to Children's Hospital of Fudan University to get further examination and treatment.
It has well accepted that tumor angiogenesis present aberrant vascular architecture and functional abnormalities, which is associated with tumorigenesis, tumor propagation and progression. By locating, separating and tracking microbubbles, the recently introduced and upgraded Ultrasound Localization Microscopy (ULM) surpassed classical wave diffraction limit. However, the acquisition of structural and functional parameters of microcirculation in vivo for ULM is still confined by the compromise between the resolution and penetration depth. The relatively long acquisition time induced the difficulty of motion correction potentially, which hampers the preclinical to clinical application in organs with distinct tissue motion such as the liver. Therefore, we take the lead in studying human liver lesion microvasculature, which remains a challenge for noninvasive, quantitative and functional intravital imaging especially due to its deep-seated location and strong motion. We developed a Super-resolution Ultrasound (SR-US) imaging technique based on ULM to assess its feasibility of visualizing and quantifying microvasculature in human organs.