Results showed that the internal filtration flow rate increased with the increase of the blood flow rate. Although Doppler ultrasonography can be very useful for monitoring the local internal filtration flow, to date it has only been used for the dialyzer. Show moreView article Light–matter ...
The endoscopic balloon technique is strongly observer-dependant : the ideal time for pressure reading is often difficult to decide, resulting in inter- and intra-observer variances. In this study we assessed the feasibility and accuracy of a new method based on EUS power doppler for monitoring EV...
The drug was admin istered twice daily for a further 3 days and the ultrasound repeated. lOP, systemic blood pressure and pulse were also measured on each occasion. RESULTS Controls The control group (age range 20-60 years, mean 33.7' years) comprised 10 females and 20 males. Three ...
WhileHVPG (hepatic venous pressure gradient)is the gold standard for measuring the portal and hepatic venous pressure, it is an invasive procedure with the insertion of a catheter into the hepatic vessels.[13]On the other hand, Doppler ultrasound is a non-invasive procedure and can evaluate for...
For color Doppler imaging, several types of signal processing are employed in order to produce acceptable images of blood flow in blood vessels while suppressing color in moving solid tissue. The processing can produce an artifact in which color may arise from noise or from tissue motion and fill...
Inappropriately high reading will be obtained Central systolic pressure may influence the 'normal' range for the ABPI [24] A defined range for normal and abnormal ABPI has been established and the deficiencies of the technique noted. These include: Reliance on the arm systolic pressure as the...
Blood flow and therefore blood vessels can be identified non-invasively during an operative procedure using these forceps, which are being used simultaneously for tissue manipulation.收藏 引用 批量引用 报错 分享 全部来源 求助全文 掌桥科研 相似文献...
It is also used in some flow meters for metering fluids, for example, water or oil and gas. The doppler shift frequency for a wave of 2 MHz passing through blood flowing at 10 cm s−1 at 60° away from the transducer is −125 Hz (frequency reduction). The frequency of the ...
Transcranial Doppler is defined as the use of ultrasound technology to monitor blood flow in major arteries, particularly in the context of pediatric critical care. It allows for real-time assessment of cerebral blood flow patterns, aiding in the early detection of cerebral hemorrhage and ischemic ...
9.An apparatus for measuring a pulmonary blood pressure of a patient, the apparatus comprising:a pressure sensor configured to measure the air pressure in at least one of the patient's lungs;a probe or sensor configured for placement externally on the patient's chest, the probe or sensor incl...