EMDT_European Medical Device Technology

European Medical Device Technology, Spring 2014

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marketplace In Focus emdt.co.uk European Medical Device Technology Spring 2014 | 65 Optical Technologies Capillary-refill sensing technology Bodkin Design and Engineering LLC, is an electrooptical systems research and design firm serving the biomedical and healthcare industries. The company designs, builds and tests prototypes of optical instruments such as a capillary-refill-time (CRT) device that represents a new optical sensing technique designed for improved diagnostic accuracy in determining dehydration in young children. The company developed a beta prototype for data collection in clinical trials, which uses special biomedical sensors that monitor CRT in infants objectively, by contrast with error-prone assessments based only on a paediatrician's clinical judgement. Capillary refill time is a common meas- ure of blood flow based on pinching and releasing a patient's fingertip and observing the time it takes for the blood to refill. The longer the refill time, the more dehydrated the patient. The CRT instrument employs an optical sensor and computer to meas- ure this effect objectively. The method is suited for infants, the elderly, and impaired patients who cannot report whether they are dehydrated. The concept development company provides research and design services that are in full compliance with medical device industry regulations and standards. Bodkin Design and Engineering LLC Newton, MA, USA +1 617 795 1968 www.bodkindesign.com Wavefront aberrometers Lumetrics Inc., a manufacturer of measurement technology, offers medical and ophthalmic device companies wavefront aberrometer products in the CLAS line, including CLAS-XP wavefront sensors used to characterize optics and laser beams. These latter systems are intended to minimise inspection costs, optimise yields and satisfy stringent requirements for new and existing products. The wavefront devices embody a patented technology the supplier acquired from Abbott. The current product suite ranges from a microcamera through a larger infrared camera for sophisticated laboratory inspection. Lumetrics Inc. Rochester, NY, USA +1 585 214 2455 www.lumetrics.com Optical lens inspection system A machine vision system with two separately tasked inspection stations, built by ATM Automation Ltd for a manufacturer of plastic moulded optical components, is suited for performing both vision and optical inspection of precision disposable tonometer lenses as part of a production cell. The vision inspection station checks each component for contamination and correct laser degating; then the optical inspection station measures the surface flatness of each moulded lens, ensuring that the optical surfaces are flat to within a few microns. The first part of the system inspects for the presence of contaminants or gate witness marks on every lens. Lenses are indexed into the inspection station by means of a rotary table and then backlit to allow inspection. Any detected lens contaminant larger than 0.3 mm2 or gate witness mark measuring 1.0 mm or greater results in the rejection of the lens in question. Lenses passing these inspection checks are presented to the second vision system for confirmation of optical flatness. This PC- based machine vision system uses a special lighting arrangement to facilitate micron- level measurement of the flatness of the optical surface and determine whether the component is within its fine-tolerance specification. ATM Automation Ltd Blaby, UK +44 1162 773 607 www.atmautomation.com ES430776_EMDT1405_065.pgs 04.29.2014 03:29 UBM black yellow magenta cyan

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