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medical instruments

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001805
EISBN: 978-1-62708-241-9
... procedures. Given the extreme conditions to which surgical tools can be exposed, and the potential for misuse, failures are inevitable and systematic methods for analyzing them are necessary to keep them in check. medical instruments fracture hydrogen embrittlement stainless steel corrosion pits...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006811
EISBN: 978-1-62708-329-4
... and Drug Administration (FDA) defines a medical device as an instrument, apparatus, implement, machine, or implant intended for use in the diagnosis, cure, mitigation, treatment, or prevention of disease that does not achieve its primary intended purposes through chemical action and is not dependent upon...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006769
EISBN: 978-1-62708-295-2
... on the secondary electron detector can also be varied on some instruments to obtain a highly directional BSE image (sometimes referred to as a reflected electron image). Figure 8 shows a fracture surface for a titanium alloy implantable medical device where the fracture radial ridges that mark a fracture origin...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006943
EISBN: 978-1-62708-395-9
.... Scanning electron microscopy instruments combined with an energy-dispersive spectroscopy (EDS) attachment (also referred to as EDX) allow the elemental chemical analysis of plastic materials. The EDS analysis with an SEM instrument can produce additional information for the plastic surfaces. The SEM...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006938
EISBN: 978-1-62708-395-9
... interactions may take on a special meaning for particular classes of polymeric parts such as implantable medical devices, which are subject to particular design controls and associated regulatory requirements. The conditions experienced by such devices initially involve surgeon handling and placement, which...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003533
EISBN: 978-1-62708-180-1
... Abstract The scanning electron microscopy (SEM) is one of the most versatile instruments for investigating the microstructure of metallic materials. This article highlights the development of SEM technology and describes the operation of basic systems in an SEM, including the electron optical...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.9781627083959
EISBN: 978-1-62708-395-9
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006917
EISBN: 978-1-62708-395-9
... and market sectors. Some examples of plastic parts commonly seen in day-to-day failure analysis investigations that fail from ESC include: Housings and enclosures for medical devices Assemblies joined with metal screws Poly(acrylonitrile-butadiene-styrene), polyvinyl chloride, and chlorinated...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006933
EISBN: 978-1-62708-395-9
... through the instrument computer to internal standards. Fig. 5 Typical energy-dispersive x-ray spectroscopy spectrum showing absorption features indicative of unique elements and the quantitation of those elements. cps, counts per second Uses of EDS in Failure Analysis Identification...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003550
EISBN: 978-1-62708-180-1
... of this effect in the polyvinyl chloride (PVC) industry. The PVC can be altered from the rigid material from which plastic pressure pipes are made to the extremely soft, flexible material from which medical tubing is made through the judicious use of plasticizers ( Ref 6 ). However, the plasticization effect...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006925
EISBN: 978-1-62708-395-9
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006911
EISBN: 978-1-62708-395-9
... of polymers and the tribometers and instrumentation used to measure the tribological properties of polymers. The article discusses the processes involved in calculating the wear rate of polymers and the methods of characterization of the sliding interface. It provides information on the pressure and velocity...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
... of production and tooling applications. Metal AM processes also proliferated in the early 2000s, especially in the aerospace and medical industries, where tailored, low-volume, high-performance parts are required. This article gives an overview on metal AM processes and describes sources of failures...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003523
EISBN: 978-1-62708-180-1
... to be responding to accidents should be made aware of the necessity of documentation and preservation of the accident scene. There are numerous reasons, both intentional and unintentional, why the condition of the accident scene may change after an accident: Medical Attention to Injured Persons...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006864
EISBN: 978-1-62708-395-9
... is in historical record keeping with proper instrumentation. The most critical things to measure are melt pressure, melt temperature, motor load, and screw speed. Table 1 lists common defects and process irregularities encountered during extrusion, the likely causes, and suggested troubleshooting steps...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006772
EISBN: 978-1-62708-295-2
... an accident: Medical attention to injured persons: Persons who may be injured during the accident usually become the top priority of personnel responding to the accident. However, during this process, relocation and/or alteration of evidence can occur that may make explanation of the events...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006867
EISBN: 978-1-62708-395-9
... which medical tubing is made through the judicious use of plasticizers ( Ref 6 ). However, the plasticization effect reduces both tensile strength and stiffness of the affected plastic and also accelerates the creep rate of the material if it is under stress. If an application of a particular plastic...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006942
EISBN: 978-1-62708-395-9
... be the immediate cause of failure, but other information, namely the design, manufacturing process, or operating instructions, can and often do aid in determining the root cause of a product failure. For example, suppose a particular medical equipment housing was manufactured using a polycarbonate. During use...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003518
EISBN: 978-1-62708-180-1
... of factors or damage mechanism (see the article “Determination and Classification of Damage” in this Volume). Root cause analysis There are many approaches. Most of this work has been done in the nuclear and chemical industries, in response to disastrous failures. It is also being used by medical...