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Laryngeal Mask Airway (LMA) Placement in a Neonatal Patient Simulator Using a Non-Inflatable Supraglottic Airway (SGA)

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Vehicle LATCH system features associated with correct child restraint installations.

Kathleen D Klinich¹, Carol A C Flannagan, Jessica S Jermakian

¹University of Michigan Transportation Research Institute, Ann Arbor, Michigan, USA. kklinich@umich.edu

Traffic Injury Prevention

|May 21, 2013

Summary

Improving vehicle Lower Anchors and Tethers for Children (LATCH) accessibility can increase correct child restraint installations. Vehicle design features like anchor clearance, force, and depth significantly impact correct lower anchor use, but tether use remains a challenge.

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Area of Science:

Pediatric Safety Engineering
Automotive Human Factors
Child Passenger Safety

Background:

The Lower Anchors and Tethers for Children (LATCH) system aims to simplify child safety seat installation.
Variations in LATCH system design across vehicles impact ease of correct installation.
Identifying vehicle-specific factors can guide improvements for child restraint system (CRS) usability.

Purpose of the Study:

To identify vehicle characteristics associated with correct child restraint system installation using LATCH.
To provide data for designing more user-friendly LATCH systems in vehicles.
To assess the impact of specific LATCH hardware features on installation success.

Main Methods:

Surveyed 98 vehicles (2010-2011 models) for LATCH system features.
Selected 12 vehicles based on LATCH characteristics for volunteer testing.
Utilized a split-plot experimental design with 36 volunteers, 4 CRS types, and 2 installation methods (LATCH anchors, seat belts).
Employed mixed-effects logistic regression to analyze predictors of correct installation and lower anchor use.

Main Results:

Only 13% of all trials resulted in a completely correct child restraint installation.
Correct lower anchor use was achieved in 60% of LATCH installations; top tether use was correct in 46% of trials where used.
Vehicle LATCH anchor accessibility features (clearance >54°, force <178 N, depth <2 cm) were strongly associated with correct lower anchor use (19x higher likelihood).
No vehicle features were found to predict correct top tether use.

Conclusions:

Improvements in vehicle LATCH system design, particularly lower anchor accessibility, can enhance correct installation rates.
Further research is necessary to understand and address challenges related to top tether attachment and correct usage.
Vehicle manufacturers should consider specific LATCH hardware characteristics to improve child safety seat installation accuracy.