TECHNOLOGY & MATERIALS | MEDICAL
Medical Devices to provide safety and durability to oxygenators. Membrane oxygenators can be used to replace lung function during open heart surgery by oxygenating blood outside the human body. This requires its material to have good blood compatibility and durability. “Thanks to its outstanding balance of properties, medical-grade Makrolon polycarbonate from Covestro makes oxygenators safe and durable,” says Chengwu Liu, Production Director of Wego. “The glass-like clarity of Makrolon 2458 polycar- bonate makes for an entirely transparent shell that enables clear observation of the proper function- ing of the oxygenating process. The polycarbonate also exhibits high impact strength and reduces the risk of accidental damage during the course of a surgery. Its biocompatibility has been tested according to ISO10993-1, ensuring highest safety for the human body.” Roche Diabetes Care has selected low-friction
Delrinacetal homopolymer from DuPont Perfor- mance Materials for its insulin placement assis- tant, the Accu-Chek LinkAssist Plus. The device helps to insert an infusion set easily and virtually pain free, even at hard to reach places on the body. Its integrated safety release prevents accidental insertion. DuPont says that the flow characteristics of
Delrin, in conjunction with its good dimensional stability and mechanical properties, make it the ideal material for producing small and thin parts that are both cost-effective and create minimal waste in the manufacturing process. “In this application, the low friction characteristics and spring-like behaviour of Delrin contribute to the smooth and fast operation of the device, which has four key components in the mechanism – wing front, primer, latch lock and slider,” says Laurent Hanen, Healthcare Segment Leader at DuPont Performance Materials. The US Food and Drug Administration (FDA) has
recently reclassified semi-rigid spinal stabilisation systems from Class III to Class II offering a regula- tory pathway to 510(k) clearance in the US for devices using PEEK-Optima polymer based rods from Invibio Biomaterial Solutions. The company says that when compared to rigid systems, semi-rigid PEEK-Optima rods can deliver similar benefits to titanium and are strong enough to stabilise the spine. The FDA decision supports the safety of
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Left: Optima PEEK from Invibio is used in spinal rod components providing semi-rigid fixation to
bridge the gap between rigid and dynamic spinal con- structs
semi-rigid systems and provides greater options for surgeons who prefer more flexibility than traditional rigid pedicle screw systems to achieve fusion. Alliqua BioMedicals is using Resilience HC, a rigid vinyl formulation from PolyOne, for housings that need to withstand stress cracking from exposure to a wide range of hospital disinfectants in the UltraMIST Ultrasound Healing Therapy system for wounds. As hospitals implement robust cleaning protocols designed to battle healthcare associated infections, medical devices are subject- ed to various types of disinfectants at different concentrations and frequency of use. Selecting the wrong material can lead to stress cracking in the device housing within weeks of field use. After extensive material evaluation, PolyOne says that the UltraMIST R&D team identified Resilience HC as a potential solution for their new device. In addition to its disinfectant resistance, this material contains the necessary flammability and UV resistance needed for the application while also providing good mouldability and surface finish. Repsol has introduced a new healthcare
portfolio comprising 28 grades of polypropylene, polyethylene and EVA copolymers. The products will be supplying pharmaceutical packaging and medical device markets. The company’s pharma facilities are at its Tarragona and Puertollano sites in Spain. Repsol has also selected distribution partners Arcoplex, Quimidroga, Velox and Snetor for its healthcare product rnage. RTP Company is highlight- ing how coloured thermo- plastic compounds are changing the medical world, and how it is taking proactive steps to provide new options for designers and manu- facturers of medical
Left: Alliqua BioMedical is using Resil- ience HC, a rigid vinyl formulation from PolyOne, for housings in the UltraMIST Ultrasound Healing Therapy system
September 2017 | INJECTION WORLD 33
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