NCT05742412: CAM-VISION

Dispatch of Emergency Call Using Video Streaming Compared With Traditional Telephone Communication

Completed NA Last updated 30 August 2023

What this trial tests

NA trial testing Video streaming (smartphone camera) in Emergency Medical Dispatch Centre in 20,539 participants. Completed in 30 April 2023.

Timeline

1 January 2023

Primary endpoint
30 April 2023

30 April 2023

Quick facts

Lead sponsor	Central Denmark Region
Phase	NA
Status	Completed
Study type	INTERVENTIONAL
Allocation	randomized
Design	parallel
Masking	single
Primary purpose	diagnostic
Enrollment	20,539
Start date	1 January 2023
Primary completion	30 April 2023
Estimated completion	30 April 2023
Sites	1 location across Denmark

Drugs / interventions tested

• Video streaming (smartphone camera)
• Telephone (telephone microphone)

Conditions studied

• Emergency Medical Dispatch Centre — all drugs for Emergency Medical Dispatch Centre →
• Video Streaming — all drugs for Video Streaming →
• Emergency Call — all drugs for Emergency Call →
• Prehospital Emergency Medical Services — all drugs for Prehospital Emergency Medical Services →

Sponsor

Central Denmark Region — full company profile →

Who can join

Eligibility, any sex, with Emergency Medical Dispatch Centre or Video Streaming. Patients with the condition only — healthy volunteers not accepted.

Sponsor's own description

In the Emergency Medical Dispatch Center, all EMS dispatchers were divided into one of two clusters with 11 EMS dispatchers in each cluster. Because of few clusters, a matched-pair (MP) design was used based on the average proportion of the dispatched level of urgency (highest level of urgency used as primary matching criteria), years of employment and the average duration of emergency calls in a 3-months period (1st of January 2022 - 31st of March 2022) before the implementation of video streaming. Newly employed personnel where matching was not possible were randomly assigned to one of the two clusters. Prior to the study period, video streaming was gradually implemented in the intervention group during a 6-months period (1st of July 2022 - 31st of December 2022).

Using a cluster randomized setup, the aim was to investigate differences in the management of emergency calls (dispatches) when emergency medical service (EMS) dispatchers use video streaming compared with telephone-only (audio-only) communication. All emergency calls will be randomly distributed between the two clusters.

Publications & conference data

3 peer-reviewed publications reference this trial (live from Europe PMC):

1. Video Streaming or Telephone Communication During Emergency Medical Services Dispatch Calls: A Cluster Randomized Clinical Trial.
   Gude MF, Valentin JB, Meisner-Jensen M, Bohnstedt-Pedersen NH, et al · · 2025 · cited 6× · PMID 40591356 · DOI 10.1001/jamanetworkopen.2025.19020
2. Can video reduce conflict between dispatcher and caller during emergency medical calls? A randomized substudy of the CAM-VISION trial.
   Søhoel JE, Gehrt TB, Bohnstedt-Pedersen NH, Dalgaard AK, et al · · 2026 · PMID 41944280 · DOI 10.1177/1357633x261435246
3. Video-assisted versus telephone-only pediatric emergency calls: a predefined substudy of the cluster randomized CAM-VISION trial.
   Bohnstedt-Pedersen NH, Gehrt TB, Blauenfeldt RA, Væggemose U, et al · · 2026 · PMID 41888824 · DOI 10.1186/s13049-026-01602-8