Results 81 to 90 of about 1,526,722 (293)

HEART VALVE SURGERY

The Journal of Thoracic and Cardiovascular Surgery, 1965
SUMMARY This paper summarizes the experience in the treatment of a series of 1,370 cases of open-heart surgery. Of these, 964 valvular lesions and the associated pathologic lesion are analyzed. Details of correction and immediate and late results in the treatment of the following groups of lesions were studied: 74 cases of congenital aortic stenosis ...
E J, ZERBINI, D, BITTENCOURT, A D, JATENE   +2 more
openaire   +2 more sources

Biodegradable and Edible Milli‐Fluidic Logic Circuits

Advanced Materials Technologies, EarlyView.
Fully biodegradable and edible fluidic circuits are developed using gelatin‐based valves that operate at low pressure. Logic gates, a one‐bit memory, and a ring oscillator are demonstrated, showing that biodegradable materials can perform computation and control.
Shuhang Zhang, Bokeon Kwak, Özgün Ekrem, Dario Floreano   +3 more
wiley   +1 more source

Bioengineered self-seeding heart valves [PDF]

, 2012
ObjectiveMechanical and biological prostheses are used to replace damaged heart valves but are associated with significant morbidities. Although there is increased interest in bioengineering cell-seeded heart valve scaffolds, it is a time-consuming and ...
Lee, Sang-Jin, Sang-Jin Lee, J. Koudy Williams, Jordan, James E., Williams, J. Koudy, Raghavan, Devanathan, Atala, Anthony, James E. Jordan, Anthony Atala, Devanathan Raghavan, James J. Yoo, Yoo, James J.   +11 more
core   +1 more source

Liquid Metal Resistive Sensing Architectures for Measuring Diaphragm Strain Responses on Obstructed Surfaces

Advanced Materials Technologies, EarlyView.
A liquid metal‐based strain‐sensing architecture to measure the deformation of a circular diaphragm against obstructed surfaces is formulated using finite element modeling and confocal imaging to establish the mechanical framework and is utilized to control diaphragm‐induced confinement on a bead array, as validated by biomolecular loading level ...
Abdullah‐Bin Siddique, Jui‐Hong Weng, Deng‐Kai Yang, Chia‐Fu Chou, Nathan S. Swami   +4 more
wiley   +1 more source

Multimodal Locomotion in Insect‐Inspired Microrobots: A Review of Strategies for Aerial, Surface, Aquatic, and Interfacial Motion

Advanced Robotics Research, EarlyView.
This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska, Kaushik Jayaram, Nicole Xu   +2 more
wiley   +1 more source

Two phase discharge flow prediction in safety valves [PDF]

, 2013
Safety Relief Valves (SRV) are necessary elements in the protection of any pressurised system and the prediction of the expected discharge flows is an important consideration for the valve sizing to ensure that rupture pressures do not occur.
Elmayyah, Wael, Dempster, William
core   +2 more sources

Degenerate calcification off heart valves and heart valves disease in patients with angina [PDF]

, 2011
Aim. То investigate the occurrence of heart valves disease and degenerate calcification of heart valves in patients with angina, to determine it's effect on the development of heart failure.Material and methods.
Павлова, А. С., Празднов, А. С., Pavlova, A. S., Prazdnov, A. S.   +3 more
core  

Compliant Pneumatic Feet with Real‐Time Stiffness Adaptation for Humanoid Locomotion

Advanced Robotics Research, EarlyView.
A compliant pneumatic foot with real‐time variable stiffness enables humanoid robots to adapt to changing terrains. Using onboard vision and pressure control, the foot modulates stiffness within each gait cycle, reducing impact forces and improving balance. The design, cast in soft silicone with embedded air chambers and Kevlar wrapping, offers durable,
Irene Frizza, Hiroshi Kaminaga, Philippe Fraisse, Gentiane Venture   +3 more
wiley   +1 more source

Immune Shielding of Human Heart Valves

JACC: Basic to Translational Science
Summary: Children born with defective heart valves require multiple donor valve replacements throughout life, because these cannot grow and can cause early failure through immune degeneration.
Marijn C. Peters, PhD, Arnaud Zaldumbide, PhD, Esmee J. Groeneveld, BSc, Martijn J.W.E. Rabelink, BSc, Janneke H. Peerlings, MSc, Antoon van den Bogaerdt, MSc, Carlijn V.C. Bouten, PhD, Rob C. Hoeben, PhD, Marie-Jose Goumans, PhD, Abraham van Wijk, MD, PhD   +9 more
doaj   +1 more source

Modular, Textile‐Based Soft Robotic Grippers for Agricultural Produce Handling

Advanced Robotics Research, EarlyView.
This article introduces textile‐based pneumatic grippers that transform simple textiles into robust bending actuators. Detailed experiments uncover how cut geometry and fabric selection shape performance. Successful handling of fragile agricultural items showcases the potential of textile robotics for safe, scalable automation in food processing and ...
Zeyu Hou, Eran Beeri Bamani, Joao Buzzatto, Bryan Busby, Lucas Ferrari Gerez   +4 more
wiley   +1 more source