High-frequency doppler ultrasound examination of blood flow in the anterior segment of the eye

1998 ◽  
Vol 126 (4) ◽  
pp. 597-600 ◽  
Author(s):  
Charles J. Pavlin ◽  
Don A. Christopher ◽  
Peter N. Burns ◽  
F.Stuart Foster
2021 ◽  
Vol 11 (3) ◽  
pp. 1004-1012
Author(s):  
Xiuchun Zhang

Abdominal wall endometriosis is a common endometriosis, which is located outside the endometrium, such as the myometrium or subcutaneous fat layer of the abdominal wall, forming a mass, active and infiltrating into the surrounding tissue, accompanied by menstrual pain, and seriously affecting the quality of life of patients. With the increasing operation of caesarean section and other traumatic operations, the incidence rate of abdominal wall endometriosis is increasing. Because of the variety of clinical manifestations of abdominal wall endometriosis, there are many kinds of diagnostic methods. Choosing the appropriate diagnostic methods to confirm abdominal wall endometriosis has become the primary work of diagnosis and treatment of abdominal wall endometriosis. This paper discusses the clinical value of high frequency colour doppler ultrasound in the diagnosis of abdominal wall endometriosis. Compared with the diagnosis of ordinary ultrasound and high frequency colour doppler ultrasound, the location, shape, size, boundary, internal echo, blood flow velocity, blood flow resistance and other parameters of the mass in the focus were observed. It is proved that the application of high-frequency colour doppler ultrasound can greatly improve the ultrasonic diagnosis rate of abdominal wall endometriosis, and it is non-invasive, radiation-free, low price, easy for patients to accept. It provides a high value clinical diagnosis basis for the early detection and treatment of abdominal wall endometriosis.


1995 ◽  
Vol 88 (6) ◽  
pp. 635-641 ◽  
Author(s):  
Andrea Mauric ◽  
Nilesh J. Samani ◽  
David P. de Bono

1. The aim of the present study was to investigate the effects of exercise and of sublingual glyceryl trinitrate on the pattern of blood flow, as studied by Doppler ultrasound, in internal mammary artery grafts performed to relieve severe stenosis of the left anterior descending coronary artery. The accessibility of the graft to transcutaneous ultrasound examination allows the effects of exercise and nitrate administration on coronary blood flow to be studied non-invasively. 2. Angina-free patients with left internal mammary to left anterior descending coronary artery grafts were studied using transcutaneous duplex ultrasound at rest, after leg exercise and after sublingual administration of 0.5 mg or 1 mg of glyceryl trinitrate. 3. Resting graft blood flow showed a biphasic pattern, with forward flow in both systole and diastole. Exercise caused an increase in time-averaged velocity of graft blood flow from 17.3 (3.3) to 24.0 (7.2) cm/s (P = 0.001), and of calculated volume flow from 44.7 (3.08) to 59.8 (5.89) ml/min (P = 0.002). Diastolic peak velocity increased from 36.1 (9.9) cm/s to 46.8 (16.2) cm/s (P = 0.04), while peak systolic velocity was unchanged. Nitrate administration caused a fall in systolic and diastolic blood pressure and an increase in heart rate; graft flow was maintained [time-averaged velocity 18.3 (6.2) cm/s before and 16.7 (5.7) cm/s after 500 μg of glyceryl trinitrate], but systole was shortened and the proportion of blood flow in diastole increased [systolic/diastolic flow ratio 0.558 (0.139) before and 0.374 (0.156) after 500 μg of glyceryl trinitrate, P = 0.01]. 4. Doppler ultrasound examination of internal mammary artery to coronary artery grafts is one of the few ways in which physiological changes in coronary flow can be assessed non-invasively in human subjects. Exercise-induced increases in graft flow involve both increased graft distension in systole and increased run-off in diastole — the elasticity of internal mammary artery grafts may be important in sustaining an exercise-induced increase in graft flow. Limitations of the technique include the difficulty of accurately measuring graft diameter, the possibility of flow through persisting connections between the graft and chest wall vessels and competing flow from the native circulation.


2020 ◽  
Vol 20 (83) ◽  
pp. 268-272
Author(s):  
Dominka Jaguś ◽  
◽  
Ewa Skrzypek ◽  
Bartosz Migda ◽  
Witold Woźniak ◽  
...  

Introduction: In recent years, ultrasonography has been used in an increasing number of fields, such as dermatology, aesthetic medicine and cosmetology. For skin imaging, research has shown the usefulness of both classic scanners equipped with linear transducers, and high-frequency scanners with mechanical transducers. An increasing number of reports indicating high usefulness of Doppler sonography have been published recently. The aim of this study was to assess the usefulness of high-frequency Doppler imaging in the diagnosis of vascular complications after aesthetic procedures using tissue fillers. Materials and methods: A total of 12 women aged 19–48 years (mean age 36.08 years) who had undergone hyaluronic acid treatment were included in the study group. Ultrasound scans were performed using standard ultrasound scanners, i.e. Philips Epiq 5 with a linear transducer and Samsung RS85 with linear transducers and Doppler Microflow Imaging option. Ultrasound scans were performed to assess the presence of blood flow using Color Power Doppler (CPA). Pulsed- Wave Doppler was used only for arteries. If no blood flow was recorded with Color Power Doppler, Microflow Imaging was used. Results: Doppler ultrasound showed normal blood flow despite reported symptoms in 3 cases. Vascular stenosis was found in 2 patients. In the other 7 patients, Doppler ultrasound showed no blood flow at the sites where complications developed. Conclusions: Skin ultrasound with Doppler options is a useful tool in the diagnosis of aesthetic medicine complications.


1997 ◽  
Vol 23 (7) ◽  
pp. 997-1015 ◽  
Author(s):  
Donald A. Christopher ◽  
Peter N. Burns ◽  
Brian G. Starkoski ◽  
F.Stuart Foster

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