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Journal Article

Citation

McDonald QH. Proc. Am. Assoc. Automot. Med. Annu. Conf. 1979; 23: 452-479.

Copyright

(Copyright © 1979, Association for the Advancement of Automotive Medicine)

DOI

unavailable

PMID

unavailable

Abstract

For the infant who cannot sit up by himself the most protective car restraint is one which is designed to face the infant rearward in the automobile and is sufficiently reclined to afford support for the infant's back, neck and head at all times. If the restraint is too upright, the infant's head falls forward onto his chest and receives no support whatsoever. If the restraint is too reclined, under impact it tends to "flatten out" risking undue loading of the possible partial or total release of the infant from the device. In this study rear-facing restraints were installed on an auto seat with a seat slope representative of the average slope of the seats in a survey of 1978 and 1979 automobiles. An infant was placed in each restraint which was then positioned at the manufacturer's recommended reclining angle or angles. The restraints were studied to evaluate the back and head support provided by each. These restraints were then impact sled tested installed on an auto seat with the same average seat slope employed in the first phase of this study. The harness loading on the shoulders of the 6-months dummy was measured for each restraint. The purpose of this study is to determine for a rear-facing infant restraint: (1) the optimum reclining angle that will provide adequate support for the infant at rest; and (2) the optimum reclining angle on impact that will afford the best back, neck and head support for the infant without imposing undue loading on the infant's shoulders.

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