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PubMed · 10180743

Detecting sterilization effects on packaging.

R H West
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Abstract

There must be evidence to show that medical devices and their packaging are compatible with the sterilization process that is used. Here, results from analysis of some medical-grade polystyrene packaging highlight the benefits offered by current surface analysis techniques.

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Durable Medical EquipmentHumansPolystyrenesProduct LabelingProduct PackagingSterilizationJournal Article

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R H West. 1998. Detecting sterilization effects on packaging.. https://pubmed.ncbi.nlm.nih.gov/10180743/

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PubMed2000

Prescription safety eyewear: impact studies of lens and frame failure.

OBJECTIVES: To determine if a plano lens could be the test lens for all prescription (Rx) lenses and to investigate why Rx lenses pop out of safety eyewear. DESIGN: Plano and Rx polycarbonate lenses (n = 641) with varying thickness and edge geometry, mounted on steel lens holders, and Rx safety eyewear (n = 128) placed on headforms were impacted with test objects of varying diameter and hardness. Impacts were studied with 500 to 2,000 frames-per-second motion analysis. RESULTS: Plano lenses were at least, or more, prone to failure (dislodgment, perforation, shatter, or crack) than -3.00 or +3.00 lenses of the same minimum thickness. More than 40% of safety frames with removable lenses broke or had lenses pop out when impacted with energies expected in industry and sports. CONCLUSIONS: Plano lenses can be used as the test lenses for all Rx lenses made of the same material with the same minimal thickness. The ANSI Z87.1-1989 industrial standard for Rx eyewear is inadequate for sports or other activities with high-impact potential. The best lens-retention system has, as a component, a frame with a bevel perpendicular to a frontal impact force.

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