Clinical Trial

Smartphone Application for Automated Measurement of Capillary Refill Time (CRT)

Study acronym: CRTApp
Not Yet Recruiting
View on ClinicalTrials.gov →
Record status
This record was last updated March 16, 2026 (before its estimated June 1, 2026 completion). Its status may not reflect the trial's current state.
Summary
This prospective, monocenter observational study aims to validate a smartphone application (CRTApp) that automatically measures capillary refill time (CRT) from a short video of a standardized finger compression. Sixty adult intensive care unit (ICU) patients will undergo a CRT measurement recorded with a professional Android smartphone. Clinical CRT will be determined from the video by three blinded observers (reference = median of the three measurements). The application will analyze the same video locally to provide an automated CRT measurement. Agreement between automated and clinical reference CRT will be assessed, and predefined subgroup analyses will explore performance across skin tone, ambient lighting, smartphone characteristics, and severity of peripheral hypoperfusion.
Trial Details
NCT Number NCT07473869
Lead Sponsor Assistance Publique - Hôpitaux de Paris
Conditions Capillary Refill Time, Peripheral Tissue Perfusion
Enrollment 60 participants
Start Date 2026-06-01
Primary Completion 2026-06-01 (estimated)
Study Completion 2027-06-01 (estimated)
Updated on ClinicalTrials.gov 2026-03-16