Correction to: Development of a simple device enabling percutaneous flow regulation for a small vascular graft for a Blalock–Taussig shunt capable of flow regulation: complete translation of an original article originally published in Pediatric Cardiology and Cardiac Surgery (154–159, 2016: vol. 32)

4区 · 医学

Article

作者: Dan, Kazunori ; Shimada, Ryo ; Nemoto, Shintaro ; Sasaki, Tomoyasu ; Motohashi, Yoshikazu ; Katsumata, Takahiro ; Tsutsui, Yasuhiro

In the original publication of the article, the title was incorrectly published.

2018-03-01·General Thoracic and Cardiovascular Surgery4区 · 医学

Development of a simple device enabling percutaneous flow regulation for a small vascular graft for a Blalock–Taussig shunt capable of flow regulation: complete translation of a review article originally published in Pediatric Cardiology and Cardiac Surgery (154–159, 2016: vol. 32)

4区 · 医学

Article

作者: Dan, Kazunori ; Nemoto, Shintaro ; Shimada, Ryo ; Sasaki, Tomoyasu ; Motohashi, Yoshikazu ; Katsumata, Takahiro ; Tsutsui, Yasuhiro

OBJECTIVESThe Blalock-Taussig shunt (BTS) operation is a cornerstone as initial palliative surgery for congenital heart disease with severely reduced pulmonary blood flow (PBF). The ideal PBF provided by BTS is crucial for an uneventful postoperative course, since excess PBF results in acute distress of the systemic circulation and insufficient PBF requires another BTS surgery. Therefore, the goal of this study was to develop a simple device to control the shunt graft flow percutaneously using a constrictor balloon connected to a subcutaneous port.METHODSThe device consists of a cylindrical balloon and an anti-bending structure extension connected to the balloon center. A PTFE vascular graft wrapped by the device was connected to a simulated closed circuit to measure the relationship between pressure and blood flow while changing the inner volume of the balloon. In a beagle model of replacement of the right carotid artery, blood flow velocity was measured in the carotid artery after saline injection into the balloon. The blood flow velocity before and after balloon inflation was compared immediately after implantation of the device and at 3 months after implantation.RESULTSThe device provided good flow control by inflating and deflating the balloon ex vivo and in vivo for up to 3 months in a canine model with a small graft wrapped with the device.CONCLUSIONSThe simple device developed in this study may enable regulation of PBF through a small vascular graft and help to prevent severe morbidity and mortality in the clinical setting of BTS.

2009-01-01·Journal of Solid Mechanics and Materials Engineering

Segment-Structured Diamond-Like Carbon Coatings on Polymer Catheter

作者: OHISHI, Ryusuke ; OGURA, Jyunpei ; MURAKI, Yasuhiro ; TAKAI, Osamu ; OHTAKE, Naoto ; NAKAGAWA, Taku ; TSUTSUI, Yasuhiro ; TSUTSUI, Nobumasa

Diamond-like carbon (DLC) has remarkable mechanical and tribological properties. Besides those mechanical properties, it has been clarified that DLC shows high biocompatibility in recent years. DLC coating can give high strength, abrasion resistance, and biocompatibility for surface of substrates. Hence DLC is a candidate for the coating material for medical devices such as artificial organ, joint, catheter, etc. The objective of this study is to develop safety protection films for implantable medical polymer devices utilizing segment-structured DLC (S-DLC) coatings. S-DLC and continuous-structured DLC were deposited on polyurethane and nylon sheet for balloon catheters. As a result, friction coefficient of DLC coated polyurethane sheet was approximately one-sixth of that of pristine polyurethane sheet, and S-DLC showed very low friction coefficient of μ=0.1-0.15. DLC coating can prevent polyurethane sheet from worn out. The puncture-resistance of nylon sheets increased 0.2MPa on average by DLC coatings regardless of the film structure. It was confirmed that DLC inhibits adsorption of blood coagulation factor. In conclusion, we succeed to verify that these DLC films can improve tribological property, abrasion-resistance, puncture-resistance, and anti-thrombogenicity of polymer catheters. Moreover, segment-structured DLC films exhibits high performance for protection of polymer material for polymer catheters.

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2019-12-04

·BioPortfolio

Global Balloon Catheter Market Research Report 20122024 [Report Updated: 25052019] Prices from USD $1830

Summary The global Balloon Catheter market will reach xxx Million USD in 2019 with CAGR xx% 20192024. The objective of report is to define, segment, and project the market on the basis of product type, application, and region, and to describe the content about the factors influencing market dynamics, policy, economic, technology and market entry etc. Based on products type, the report describes major products type share of regional market. Products mentioned as follows: Normal Balloon Catheter Cutting Balloon Catheter Scoring Balloon Catheter Drug Eluting Balloon Catheter Stent Graft Balloon Catheter Leading vendors in the market are included based on profile, business performance etc. Vendors mentioned as follows: Boston Scientific Medtronic Terumo B. Braun Melsungen Cook Medical MicroPort Scientific QX Medical Meril Life Hexacath Abbott Laboratories Tokai Medical Products Biosensors International Jotech Cardionovum Cordis Biotronik Based on Application, the report describes major application share of regional market. Application mentioned as follows: Hospitals Ambulatory Surgical Centres Cardiac Catheterisation Laboratories Based on region, the report describes major regions market by products and application. Regions mentioned as follows: AsiaPacific North America Europe South America Middle East Africa

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