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排序方式: 共有175条查询结果,搜索用时 15 毫秒
1.
Clifford L. Cua MD Pace Johnston MD Jill Harmon RDCS Kathryn Shelton RDCS Patrick I. McConnell MD 《Echocardiography (Mount Kisco, N.Y.)》2017,34(12):1956-1958
Mitral valve construction using extracellular matrix (ECM) is a relatively new procedure. In this case, a 15‐month‐old boy with a history of severe mitral valve regurgitation secondary to endocarditis underwent mitral valve surgery. Mitral valve repair was not possible, and thus, a 17 mm extracellular matrix cylinder valve (ECM‐CV) was constructed for valve replacement. The ECM‐CV is clearly imaged using echocardiography, especially three‐dimensional imaging, that helped define valve function. As the use of ECM for valve construction increases, echocardiography will play an essential role in evaluating the function and mechanics of these novel valves. 相似文献
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Hamid Shokoohi MD MPH RDMS RDCS FACEP Zachary Kendrick MD Neal Sikka MD Keith S. Boniface MD RDMS RDCS 《Journal of clinical ultrasound : JCU》2018,46(4):296-298
A retained urethral foreign body is an uncommon presentation in the Emergency Department. The diagnosis and treatment of retained urethral foreign bodies are determined by their size, location, shape, and mobility and often require specialty consultation and operative intervention. In this case of a 74‐year‐old man with a self‐inserted, retained urethral foreign body, we present the utility of a bedside ultrasound to detect the depth, size, and distance from the meatus of the object to guide the approach to extraction of the object at the bedside in the Emergency Department. © 2017 Wiley Periodicals, Inc. J Clin Ultrasound 46 :296–298, 2018 相似文献
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Kendall S. Hunter PhD Justin K. Gross BSc Craig J. Lanning BSc K. Scott Kirby RDCS Karrie L. Dyer MD D. Dunbar Ivy MD Robin Shandas PhD 《Congenital heart disease》2008,3(2):106-116
Objective. Noninvasive diagnostics for pulmonary arterial hypertension (PAH) have traditionally sought to predict main pulmonary artery pressure from qualitative or direct quantitative measures of the flow velocity pattern obtained from spectral Doppler ultrasound examination of the main pulmonary artery. A more detailed quantification of flow velocity patterns in the systemic circuit has been obtained by parameterizing the flow trace with a simple dynamic system model. Here, we investigate such a model's utility as a noninvasive predictor of total right heart afterload and right heart function. Design. Flow velocity and pressure was measured within the main pulmonary artery during right heart catheterization of patients with normal hemodynamics (19 subjects, 20 conditions) and those with PAH undergoing reactivity evaluation (34 patients, 69 conditions). Our model parameters were obtained by least‐squares fitting the model velocity to the measured flow velocity. Results. Five parameter means displayed significant (P < .05) differences between normotensive and hypertensive groups. The model stiffness parameter correlated to actual pulmonary vascular resistance (r = 0.4924), pulmonary vascular stiffness (r = 0.6811), pulmonary flow (r = 0.6963), and stroke work (r = 0.7017), while the model initial displacement parameter had good correlation to stiffness (r = 0.6943) and flow (r = 0.6958). Conclusions. As predictors of total right heart afterload (resistance and stiffness) and right ventricle work, the model parameters of stiffness and initial displacement offer more comprehensive measures of the disease state than previous noninvasive methods and may be useful in routine diagnostic monitoring of patients with PAH. 相似文献
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A Cost‐effective,Gelatin‐Based Phantom Model for Learning Ultrasound‐Guided Fine‐Needle Aspiration Procedures of the Head and Neck 下载免费PDF全文
Clare Richardson BS Stewart Bernard BS Vi Am Dinh MD RDMS RDCS 《Journal of ultrasound in medicine》2015,34(8):1479-1484
The rise in popularity of ultrasound imaging has seen a corresponding increase in demand for effective training tools such as phantom models. They are especially useful for teaching and practice of invasive procedures, such as fine‐needle aspiration of lesions of the head and neck. We have created 2 gelatin models out of inexpensive, commonly available materials that can be used in sequence to learn head and neck fine‐needle aspiration. Fundamental skills can be learned first on the flat, rectangular model, whereas the second, cylindrical model more closely represents human anatomy and can be used to develop more advanced technique. 相似文献
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Hamid Shokoohi MD MPH RDMS RDCS Sigrid Nasser MD Matthew Pyle MD James P. Earls MD FSCCT Andrew Liteplo MD Keith Boniface MD RDMS 《Journal of clinical ultrasound : JCU》2020,48(6):337-342
In emergency department (ED) cases with clinically suspected diverticulitis, diagnostic imaging is often needed for diagnostic confirmation, to exclude complications, and to direct patient management. Patients typically undergo a CT scan in the ED; however, in a subset of cases with suspected diverticulitis, point-of-care ultrasound (POCUS) may provide sufficient data to confirm the diagnosis and ascertain a safe plan for outpatient management.We review the main sonographic features of diverticulitis and discuss the diagnostic accuracy and potential benefits of a POCUS First model. 相似文献
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Shiro Hoshida MD PhD Yukinori Shinoda MD Hirooki Inui MD Ryoji Hosoi RDCS Fumiko Teranishi RDCS Nobuaki Asaoka RDCS Toshifumi Sugitani PhD Toshimitsu Hamasaki PhD 《Journal of clinical hypertension (Greenwich, Conn.)》2014,16(8):606-611
This study aimed to define the difference in cardiac hypertrophy between hypertensive patients with and without renal artery stenosis (RAS). When cardiac ultrasonographic examination was performed in 971 consecutive hypertensive outpatients, renal peak systolic velocity (PSV) was examined. Compared with patients without RAS, those with RAS (PSV ≥180 cm/s, 4.1%) were significantly older and included a higher proportion of male patients and had a higher left ventricular mass index (LVMI). A stratified analysis in the selected 120 patients showed that the LVMI was significantly higher in patients with RAS than in those without RAS for each confounding factor such as age and blood pressure. RAS was independently associated with a higher LVMI on propensity score analysis and multivariate analysis. Thus, the difference in LVMI between hypertensive patients with and without RAS was confirmed, irrespective of age and blood pressure, by stratified propensity score analysis and multivariate regression analysis. 相似文献