Results 11 to 20 of about 2,174 (175)

Unusual Spinal Epidural and Paraspinal Venous Engorgement Secondary to Hepatosplenic Schistosomiasis: A Rare Cause of Severe Low Back Pain. [PDF]

Clin Case Rep
ABSTRACT Severe low back pain from spinal epidural and paraspinal venous engorgement secondary to hepatosplenic schistosomiasis is rare. MRI revealed dilated epidural veins and neural foraminal narrowing. The patient was managed conservatively with analgesia and carvedilol for portal hypertension and subsequently experienced complete resolution of back
Birara ED, Bejiga YD, Girmaye R, Bayu EG, Anberber HM, Tadesse AA, Kidanu HF, Bayisa RG, Woyimo TG.   +8 more
europepmc   +2 more sources

Using an artificial intelligence-based device to investigate pain outcomes in robotic prostatectomy at low pressure pneumoperitoneum: The RALP clinical trial. [PDF]

BJUI Compass
Abstract Objective This study aims to investigate any differences in the levels of intra‐operative (measured by an artificial intelligence device) and post‐operative pain between two different abdominal insufflators (AirSeal vs Stryker) used for a low‐pressure pneumoperitoneum robotic prostatectomy.
Vasdev N, Isherwood L, Feyissa M, Spencer N, Roxas-Saguil C, Jonsson A, Irvine K, Wellsted D, King S, Daniels J, Peacock L, Odedra T, Smith P, Dasgupta P, Decaestecker K, Belavadi P, Shukla B, Prasad V, Gowrie-Mohan S.   +18 more
europepmc   +2 more sources

The Effect Of The Valveless Pulse Combustor’s Design Components On Its Performance And NOx Emissions

Journal of Applied Science and Engineering, 2022
The goal of this research is to develop a pulse combustion simulation model in order to determine the parameters that influence the pulse combustor’s performance when the design geometry is optimized.
Said M. A. Ibrahim, Mohamed. R. Taha, Mahmoud. N. Elqammash   +2 more
doaj   +1 more source

Design and Fabrication of Pneumatically Actuated Valveless Pumps

Micromachines, 2021
In this study, a valveless pump was successfully designed and fabricated for the purpose of medium transportation. Different from traditional pumps, the newly designed pump utilizes an actuated or a deflected membrane, and it serves as the function of a ...
Jr-Lung Lin
doaj   +1 more source

Building Valveless Impedance Pumps From Biological Components: Progress and Challenges

Frontiers in Physiology, 2022
Valveless pumping based on Liebau mechanism entails asymmetrical positioning of the compression site relative to the attachment sites of the pump’s elastic segment to the rest of the circuit.
Narine Sarvazyan
doaj   +1 more source

Design and Analysis of a Cardioid Flow Tube Valveless Piezoelectric Pump for Medical Applications

Sensors, 2023
Piezoelectric pumps play an important role in modern medical technology. To improve the flow rate of valveless piezoelectric pumps with flow tube structures and promote the miniaturization and integration of their designs, a cardioid flow tube valveless ...
Jialong Wang, Fan Zhang, Zhenzhen Gui, Yuxin Wen, Yaohua Zeng, Tang Xie, Tian Tan, Bochuan Chen, Jianhui Zhang   +8 more
doaj   +1 more source

Novel characteristics of valveless pumping [PDF]

Physics of Fluids, 2009
This study investigates the occurrence of valveless pumping in a fluid-filled system consisting of two open tanks connected by an elastic tube. We show that directional flow can be achieved by introducing a periodic pinching applied at an asymmetrical location along the tube, and that the flow direction depends on the pumping frequency.
Timmermann, Stine, Ottesen, Johnny T.
openaire   +2 more sources

Positive Periodic Solution for Pipe/Tank Flow Configurations with Friction

Mathematics, 2023
In this article, we study a periodic boundary value problem related to valveless pumping. The valveless pumping is described by the unidirectional flow of liquid in a system.
Haiqing Du, Xiaojing Wang, Bo Du
doaj   +1 more source

Analysis of the characteristics of valveless piezoelectric pump with crescent dune bluff body

Science Progress, 2023
To improve the output flow characteristics of the piezoelectric pump in one direction, a new valveless piezoelectric pump with a crescent dune bluff body has been proposed.
Changxiong Xie, Shuaishuai Zhou, Yong Zhang, Jianchen Wang, Xiaolei Deng, Jun Yang   +5 more
doaj   +1 more source

Research on a Piezoelectric Pump with Flexible Valves

Applied Sciences, 2021
Imitating the structure of the venous valve and its characteristics of passive opening and closing with changes in heart pressure, a piezoelectric pump with flexible valves (PPFV) was designed. Firstly, the structure and the working principle of the PPFV
Weiqing Huang, Liyi Lai, Zhenlin Chen, Xiaosheng Chen, Zhi Huang, Jietao Dai, Fan Zhang, Jianhui Zhang   +7 more
doaj   +1 more source