Murata aims to be a player in the medical space. And they’ve got a series of products to prove it. The company is paying particular attention to small and easy-to-use health-care equipment for the prevention of illness. Some of the product categories the company participates in includes wireless communication modules such as Wi-Fi, Bluetooth Smart module, and NFC (Near Field Communication...
The newly upgraded intrinsically safe Earth-Rite TELLUS II from Newson Gale offers effective, constantly verified static ground monitoring for drums, IBCs, and other mobile or portable equipment during hazardous area operations. It’s suitable for use in the handling, transporting, or mixing of combustible products. The TELLUS II provides the operator with a bright green flashing LED to...
Electromagnetic compatibility (EMC) is a major concern in medical electronics, considering that functional anomalies may be life threatening. In addition, design constraints, notably leakage current limitations, make the EMC design of medical electronic devices more difficult than their nonmedical counterparts.   With many devices, particularly small ones, the design approach is...
The initial design is essentially done. It could be a device for fluid flow/control, a diagnostic instrument, or other medical device using an aluminum electronic enclosure. Now the design engineer needs to house the boards and electronics into an enclosure, and it needs to get done quickly and cost-effectively. There are four main areas that the enclosure needs to balance: be the right size and...
In a hospital environment, many types of diagnostic and clinical equipment are used to monitor and control patients’ health. Due to the fact that increasing numbers of electronic devices are transmitting data, the electromagnetic interference (EMI) between the different pieces of equipment can cause malfunctioning of the medical devices, and this is becoming a serious concern. In a medical...
AAMI has just released an updated technical information report to offer guidance on preventing electromagnetic interference, hoping to provide a template for a wireless and electromagnetic compatibility policy. The report, ANSI/AAMI TIR18: 2010, Guidance on Electromagnetic Compatibility of Medical Devices in Healthcare Facilities, was developed with clinical and biomedical engineers in mind. AAMI...
  Originally Published MEM Fall 2009 ELECTROSTATIC DISCHARGE         Figure 1. CDM versus CBE damage (formerly diagnosed as EOS). A common myth persists that once a device is mounted onto a printed circuit board (PCB), it is significantly less vulnerable to electrostatic discharge (ESD).1–3 However, it has long been known that integrated circuits (ICs)...
  Originally Published MEM Fall 2008 COMPONENTS       (click to enlarge) An EMI-hardened op amp (top) and a low-noise precision op amp (bottom) from National Semiconductor. Companies developing medical diagnostic equipment are faced with the challenge of providing customers with the best possible functionality at the most attractive price. Reducing...
  WaveZero (Sunnyvale, CA), which specializes in custom EMC services for medical devices, has debuted an expert design service to assist medical electronics contract manufacturers in guaranteeing EMC compliance with IEC 60601-1-2, RoHS, WEEE, FDA, and FCC requirements with designed-in EMC offerings. “Many EMC product manufacturers provide only stock or ‘design-it-yourself'...
  Device and system designers encounter a wide variety of emissions and immunity problems. Some electromagnetic interference (EMI) problems are common to a range of technology sectors, while others are specific to a single field of business. Medical device electronics, for example, involve some unique problems. These concerns are partly because of the need for patient safety and partly...
  Originally Published MEM Fall 2005 POWER SUPPLIES   Understanding the electromagnetic interference issues for power supplies helps designers to select the right power supply to integrate into their medical electronics. Ryan Gordon Benhard Ferite core selection is integral to achieving low EMI. Of the three cores shown here (left to right: EER, RM, and E types), RM may be the...
  Originally Published MEM Fall 2004 EMC REQUIREMENTS   The deadline for compliance with new test standards to qualify equipment for sale in the European Union is November 1, 2004. Jack Black The European Union (EU) requirements for selling and marketing electrical and electronic medical devices in Europe are spelled out in the Medical Devices Directive (MDD; 93/42/EEC). This product...
  Originally Published MEM Fall 2003 EMC   An on-line EMI distribution mapping system pinpoints potential EMI threats and provides information for determining preventive action. Basile Spyropoulos, Dimitris Glotsos, Dimitris Batistatos, and Ioannis Marneris The electromagnetic environment of hospitals has changed dramatically over the past 20 years, and such change is ongoing. New,...
Originally Published MEM Fall 2002 EMC Standards Stricter EMC Requirements in Store for Electrical Medical Devices A new electromagnetic compatibility (EMC) standard for electrical medical devices will impose more-stringent requirements on products before being placed on the market. Dan Hoolihan The International Electrotechnical Commission (IEC) released a new international...
  Originally Published MEM Fall 2002 From the Editor Decade of Dedication: MEM Marks 10 Years in Medical Electronics Sherrie Conroy In 2001, a new standard expanded the EMC requirements for medical devices. Now, IEC 60601-1-2 has taken on even more significance because the Food and Drug Administration has recently begun accepting test results to the international standard as...
Originally Published MEM Fall 2002 EMI Shielding Mechanical Design Guidelines for EMI Shielding Shielding problems with EMI gaskets can often be traced back to improper mechanical compression. Michael Keough and Jason Davis Portable wireless devices are being used to connect medical devices and patient information to hospital networks. As these devices grow more sophisticated,...
Electrostatic Discharge   Douglas C. Smith Hidden sources of electrostatic discharge, from hospital-room furniture to pocketed coins, can cause interference to sensitive equipment. Like other electronic products, medical electronics are not immune to unexplained electrostatic discharge (ESD) problems that are becoming more difficult to identify and reproduce. ESD from personnel or metal...
  Electromagnetic Compatibility Daniel D. Hoolihan Forthcoming standard ANSI C63.19 ought to clarify issues of compatibility between hearing aids and wireless telephones used by hearing-aid wearers. As U.S. baby boomers age, their use of personal hearing aids for sound amplification will surely increase. At the same time, the high-technology device called a cellular telephone has been...
Medical Electronics Manufacturing Fall 1999 ELECTROMAGNETIC COMPATIBILITY Understanding the issues surrounding IEC 61000-4-3 can ensure that the laboratory results are sufficient for the product being tested. Clark Vitek Since 1996, many medical electronic products have been required to meet standards for immunity to radiated electromagnetic fields. In Europe, radiated electromagnetic field...
Medical Electronics Manufacturing Magazine MEM Article Index Medical Electronics Manufacturing Fall 1998 EMC Regulations Manufacturers should take note of recent developments in the EMC regulatory arena to ensure that their devices make it through the approval process. Daniel D. Hoolihan Recent reports of medical device malfunctions caused by interference from licensed radio-frequency sources...
Medical Electronics Manufacturing Magazine MEM Article Index Medical Electronics Manufacturing Fall 1998 Electromagnetic Compatibility Common-mode currents on printed wiring boards can be controlled through simple design concepts. Thurman J. (Bill) Ritenour Electromagnetic compatibility is a dual phenomenon, involving both immunity to and suppression of electromagnetic interference. Immunity has...
A Medical Electronics Manufacturing Fall 1997 Feature ELECTROMAGNETIC COMPATIBILITY   Joseph E. Butler Board-level shielding, laminates, and enclosures can resolve EMI problems and help designers comply with international medical equipment standards. The importance of effective EMI shielding of medical devices continues to escalate, due in large part to two European regulatory requirements...
A Medical Electronics Manufacturing Fall 1997 Feature ELECTROMAGNETIC COMPATIBILITY Chris M. Kendall Using high-frequency design methods along with PCB layout and CM filtering results in medical devices that can withstand immunity threats. With the advent of recent national and international immunity standards, manufacturers of medical electronic equipment have become increasingly concerned about...
A Medical Electronics Manufacturing Fall 1997 Feature EMC REGULATIONS William D. Kimmel and Daryl D. Gerke Assessing the effects of EU and FDA EMI and EMC regulations is critical to the design of medical electronic products. Because the sensitive analog amplifiers, sophisticated microprocessors, and other components in medical electronic equipment can be adversely affected by electromagnetic...
Medical Electronics Manufacturing Magazine | MEM Article Index An MEM 1996 Designer's Guide Feature   William D. Kimmel and Daryl D. Gerke Some 12 common EMI-related mistakes account for most typical EMI problems in medical devices; with careful planning in the design stage, they can be easily prevented.   Although some EMI problems are quite subtle, most are readily understood and...