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SABIC Innovative Plastics provides EMI/RFI shielding for Multigon’s Transcranial Doppler device

SABIC Innovative Plastics : 27 February, 2008  (New Product)
SABIC Innovative Plastics' LNP Faradex compound has been used to provide
EMI/RFI shielding for Multigon Industries’ new portable Transcranial Doppler (TCD) device that provides a new way to detect unseen, yet traumatic, brain injuries in the field.
The Neurovision 500P pocket TCD, EMI/RFI shielding provided by LNP Faradex compound, makes it easier for doctors and other medical personnel to evaluate a potential brain injury on site, possibly improving outcomes from head injuries through early diagnosis and intervention.

Before the use of TCD technology, assessing a possible brain injury in the field was an inexact process: ask questions; check speech patterns; look for dilated pupils. However, lacking these clues and access to a CT scan, an injured athlete or soldier might be sent back into action instead of receiving treatment.

To meet the need for a highly precise yet highly portable diagnostic tool, Multigon developed the handheld Neurovision 500P device. The company sought a solution for the housing that would offer shielding yet help keep costs down to spur wide adoption and minimise weight for maximum portability.

The Neurovision TCD requires EMI/RFI shielding to prevent interference that could impair its performance. Multigon turned to SABIC Innovative Plastics to find a cost-effective and lightweight shielding solution for the housing. Traditional plastic using a copper overspray is expensive, labour-intensive, and may result in uneven application that can affect performance.

SABIC Innovative Plastics supplied LNP Faradex DS 1003 FR HI composite, a polycarbonate-based material infused with stainless steel fibres. By avoiding the secondary metal-spraying operation, LNP Faradex compound reduced manufacturing costs while delivering equivalent or better shielding performance.

'SABIC Innovative Plastics reaffirms our dedication to helping the healthcare industry achieve diagnostic and clinical breakthroughs,' said Clare Frissora, market director for Healthcare, SABIC Innovative Plastics. 'By leveraging our global resources, material technologies and strong customer relationships, such as the one with Multigon Industries, we are supporting the industry's efforts to improve quality of care.'

'We initially used a copper overspray to provide shielding for the Neurovision housing,' said William Stern, vice president, Multigon Industries. 'However, the time and labour associated with spraying added a significant amount to the cost of producing the housing. We also were concerned about inconsistencies in the application that could impact performance. By working with SABIC Innovative Plastics, we found a much better solution that not only cut our costs by 60 percent, but also provides uniform shielding performance. LNP Faradex compound helps us keep costs down to drive adoption of the Neurovision 500P.'

The Neurovision 500P pocket TCD system opens up new possibilities for TCD exams and patient care. The system’s small size, portability, and full feature set, as well as low cost, make it a perfect diagnostic tool for any setting. Intuitive and convenient one-handed operation helps clinicians conduct exams accurately and efficiently.

Completed studies are stored on removable flash cards and transferred to a personal computer for post-processing and patient report generation. By using a complete range of Doppler probes, the Neurovision 500P can be used for transcranial, carotid, and peripheral Doppler analysis.

LNP Faradex DS 1003 FR HI compound uses stainless steel fibres to provide enhanced shielding performance without the need for secondary metal-coating operations.

Shielding effectiveness is 40 - 55db (at about 0.125inch). The compound also provides flame retardance that supports requirements for elimination of halogenated additives, as well as high impact resistance performance and low shrinkage.
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