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3D-Printable Rotary Valves for Low-Pressure Pneumatic and Fluidic Applications in Analytical Chemistry.
Anal Chem
December 2024
NASA Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, United States.
We report on a fused deposition modeling 3D-printable rotary valve fabricated from high-grade plastics such as polyether ether ketone or lower-grade plastics like polylactic acid. The valve weighs less than 90 g and has the potential to be integrated into portable and autonomous chemical analysis systems. It has been demonstrated to be leak-proof up to 2.
View Article and Find Full Text PDFManagement of Surgical Transcatheter Aortic Valve Replacement (TAVR) Valve Explantation for Early Degeneration: A Case Report.
Cureus
October 2024
Cardiothoracic Surgery, Albany Medical Center, Albany, USA.
Early degeneration of the bioprosthetic aortic valve after transcatheter aortic valve replacement (TAVR) requires aortic valve reintervention, especially in young patients. However, the management of aortic valve reintervention after TAVR is not established. In this case report, the authors report a young patient with an early degenerated TAVR valve who underwent TAVR valve explantation and surgical aortic valve replacement with a mechanical valve.
View Article and Find Full Text PDFmodel of pathological calcification of human aortic valve.
Front Cardiovasc Med
August 2024
Research Laboratory of Diseases with Excessive Calcification, Almazov National Medical Research Centre, Saint Petersburg, Russia.
The development of drug therapy for the pathological calcification of the aortic valve is still an open issue due to the lack of effective treatment strategies. Currently, the only option for treating this condition is surgical correction and symptom management. The search for models to study the safety and efficacy of anti-calcifying drugs requires them to not only be as close as possible to conditions, but also to be flexible with regard to the molecular studies that can be applied to them.
View Article and Find Full Text PDFPositive correlation between echocardiographic tricuspid E peak velocity and central venous pressure in dogs: A preliminary study.
Vet Radiol Ultrasound
May 2024
Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
In the absence of vascular obstruction, central venous pressure (CVP) is a hydrostatic pressure in the cranial and caudal vena cava, providing valuable information about cardiac function and intravascular volume status. It is also a component in evaluating volume resuscitation in patients with septic shock and monitoring patients with right heart disease, pericardial disease, or volume depletion. Central venous pressure is calculated in dogs by invasive central venous catheterization, which is considered high-risk and impractical in critically ill patients.
View Article and Find Full Text PDFMitral valvuloplasty using real-time three-dimensional transesophageal echocardiography.
Ann Noninvasive Electrocardiol
January 2024
Department of Ultrasound, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China.
Objective: This study aimed to investigate the structure of the mitral valve in patients undergoing mitral valvuloplasty (MVP) using real-time three-dimensional transesophageal echocardiography (RT-3D-TEE). The main objective was to study the relationship between intraoperative annuloplasty ring size and mitral valve structure dimensions, with a focus on exploring the application value of RT-3D-TEE in MVP.
Methods: A total of 28 patients with degenerative mitral regurgitation (DMR), who underwent MVP between February and September 2022, as well as 12 normal control cases, were enrolled in this study.
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