Coronary artery perforation is a rare and dangerous complication of percutaneous coronary intervention. Its consequences may range from minimal dye staining of the pericardial cavity to haemodynamic collapse, and it requires urgent treatment. Nearly half of cases occur due to the use of stiff and hydrophilic guidewires. Perforations due to stent deployment or strut rupture are seen more rarely,...

Inferior vena cava filters are increasingly used in patients with recurrent venous thromboembolism who are contraindicated to anticoagulation. Migration of a broken strut to the pulmonary artery is a very rare complication of these filters. We report the case of an 83-year-old female who experienced this complication with the migratory strut remaining in the same position for years. This case p...

This paper presents a design alternative and the rationale for a stage separation system based on Metering Adiabatic Gas Struts (MAG Struts) for the Ares 1 launch vehicle. The MAG Strut separation system was proposed as an alternative to the current Ares 1 separation system, which relies on small solid rocket motors to provide the main separation force. This paper will describe technical issues...

Coronary artery perforation is a rare and dangerous complication of percutaneous coronary intervention. Its consequences may range from minimal dye staining of the pericardial cavity to haemodynamic collapse, and it requires urgent treatment. Nearly half of cases occur due to the use of stiff and hydrophilic guidewires. Perforations due to stent deployment or strut rupture are seen more rarely,...

Transjugular intrahepatic portocaval shunt (TIPS) is performed in patients with symptomatic Budd-Chiari syndrome (BCS) who do not have repairable hepatic veins. We report the case of a patient who had an inferior vena cava (IVC) stent placed previously as part of the management for BCS, and who subsequently required TIPS. The TIPS tract was created through the strut of the previously placed IVC...

Introduction: One possible cause of thigh pain following noncemented total hip arthroplasty is increased stress in the mid-portion of the femur. Anterolateral placement of a cortical strut allograft has successfully alleviated thigh pain in symptomatic patients. The purpose of this study was to show experimentally whether the surface strains on the femur are altered by the presence of cemented ...

Compression-compression fatigue testing of metallic-glass foam is performed. A stress-life curve is constructed, which reveals an endurance limit at a fatigue ratio of about 0.1. The origin of fatigue resistance of this foam is identified to be the tendency of intracellular struts to undergo elastic and reversible buckling, while the fatigue process is understood to advance by anelastic strut b...

The present study aims to establish comprehensive test methods to evaluate the mechanical properties of the intravascular coronary stent with a closed cell design. We focused on three important mechanical properties required to the stent, bending flexibility, radial strength, and longitudinal strength. Test apparatuses and testing procedures were then developed for precise evaluation of those p...

INTRODUCTION: Stability of the proximal humeral fracture can be difficult to achieved if osteoporosis or severe loss of bone stock is presented. Recently, locking plate technology has included these fractures, but appears that may not be predictable as hoped. Recent studies have demonstrated the importance of both reduction and mechanical support of the medial column in proximal humerus fractur...