CClinicalTrials.gg
CompletedNCT04408417AHTUpdated Feb 1, 2022

Automated Harness Tightener for Child Safety Seat

An interventional study of Prototype child safety seat with tension indicator lights and Control child safety seat in Child Passenger Safety, sponsored by Children's Hospital of Philadelphia. Completed at 1 site in United States. Open to participants aged 18 Years to 75 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-02-01.

Sponsored by Children's Hospital of Philadelphia · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
92
Allocation
Randomized
Ages
18 Years to 75 Years
Sex
All
01

Study summary

The overall objective of this study is to evaluate the efficacy of a tensioning progress indicator light to achieve proper harness tensioning in child safety seats.

Read the detailed description

The primary objective of the study is to determine whether a prototype convertible child safety seat with visual indication of successful tensioning technology reduces the amount of harness slack compared with a standard safety seat. The secondary objective of the study is to assess caregivers' perceptions of the quality, design, and ease of use of the prototype child safety seat tensioning progress indicator lights. Participants will be parents/caregivers aged 18 to 75 years of children between 6 and 24 months of age. Approximately 130 caregiver-child dyads will be enrolled. Participants will be asked to harness their child into two versions of a convertible child safety seat, twice in each car seat. The intervention seat will be equipped with the technology that gives visual indication of successful harness tensioning. Participants will be observed, assessed, and asked a series of survey questions after each harnessing period.

02

Conditions studied

  • Child Passenger Safety
03

In context

Lead sponsor

Children's Hospital of Philadelphia is the lead sponsor of 480 studies on the registry; 85 are open to participants now.

Of its 28 completed or terminated interventional studies of FDA-regulated products, 22 (79%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 75 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Adults aged 18-75 years who are the parent/legal guardian of a child aged 6 months-24 months
  • Parent/legal guardian has harnessed a child into a safety seat in the last 30 days

Exclusion criteria

Exclusion Criteria:

  • Non-fluency in written and/or spoken English
  • Parent/legal guardian cannot install, and/or child cannot be harnessed into, a safety seat due to a physical or health limitation
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Crossover assignment
Masking
None (open label)
Enrollment
92 participants (actual)

Study arms

  • Experimental
    Harnessing Sequence A

    Participants will harness their child into the 2 different child safety seats in the following order: control, prototype, prototype, control.

    Device: Prototype child safety seat with tension indicator lights · Device: Control child safety seat

  • Experimental
    Harnessing Sequence B

    Participants will harness their child into the 2 different child safety seats in the following order: prototype, control, control, prototype.

    Device: Prototype child safety seat with tension indicator lights · Device: Control child safety seat

  • Experimental
    Harnessing Sequence C

    Participants will harness their child into the 2 different child safety seats in the following order: control, control, prototype, prototype.

    Device: Prototype child safety seat with tension indicator lights · Device: Control child safety seat

  • Experimental
    Harnessing Sequence D

    Participants will harness their child into the 2 different child safety seats in the following order: prototype, prototype, control, control.

    Device: Prototype child safety seat with tension indicator lights · Device: Control child safety seat

Interventions

  • DevicePrototype child safety seat with tension indicator lights

    The prototype child safety seat is a convertible rear-facing seat with a harness system that includes tension indicator lights.

  • DeviceControl child safety seat

    The control child safety seat is a convertible rear-facing seat without tension indicator lights.

06

What researchers measure

Primary outcomes

  1. Change in harness tension

    After each of the four harnessing periods, the tension force on the safety seat harness will be measured with a load cell in Newtons and/or a qualitative "pinch" test which provides a binary value of tight vs not-tight. Within-participant harness tension is compared.

    Time frame: Up to 5 minutes

Secondary outcomes

  1. Participant perceptions of usability of the tension progress indicator light technology: survey

    Participant perceptions of the usability of the technology will be collected and the control and prototype harnessing systems will be compared. Participants will be asked to complete a post-intervention survey that contains 4 items pertaining to the usability of the technology through Likert scales (range from Very difficult to Very easy). There is no overall score for these survey items.

    Time frame: 30 minutes

07

Study locations

1 site
  • Children's Hospital of Philadelphia Roberts Center for Pediatric Research
    Philadelphia, Pennsylvania 19146, United States
08

References and documents

Study documents

  • Informed consent form · Apr 19, 2021

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: Yes — Data and study documents will be shared with Minnesota HealthSolutions (the sponsor). No identifiable data will be used for future study without first obtaining Institutional Review Board (IRB) approval. The investigator will obtain a data use agreement between the provider (the PI) of the data and any recipient researchers (including others at CHOP) before sharing a limited dataset (PHI limited to dates and zip codes).

Supporting information: Study protocol, Sap, Icf, Csr, Analytic code

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 1, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04408417
Lead sponsor
Children's Hospital of Philadelphia
Collaborators
Minnesota HealthSolutions, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
Responsible party
Sponsor
First posted
May 29, 2020
Start date
Mar 1, 2021
Primary completion
Oct 15, 2021
Completion
Oct 15, 2021
Last update
Feb 1, 2022

Study contacts

Allison Curry, PhD, MPH
principal investigator · Children's Hospital of Philadelphia
Nick Rydberg
principal investigator · Minnesota HealthSolutions

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jan 2022. You cannot join it, but the record below documents what was studied.

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