Audio-Emergency CallNCT06598592
Video Emergency Calls of Bystanders
A study testing Video-Emergency and Audio-Emergency Call in people with Audio-Emergency Call and Video-Emergency Call, run by Medical University of Vienna at 1 site in Austria.
Trial summary
Emergency center dispatchers often face the challenge that emergency calls typically provide only verbal information. However, many first responders use smartphones, which could enable the option for video calls during emergencies. Read more about this study
- Who is it for?
- Ages 18 to 70 yearsHealthy volunteers can take part
- Conditions the study is for
- Audio-Emergency Call, Video-Emergency Call
- What is being tested?
- Video-Emergency and Audio-Emergency Call
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 80 participants
- Where
- 1 siteAustria
- Study dates
- 16 Sep 2024to 28 Feb 2025
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 70 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- 18-70 years
- User of a smartphone
- German Language
Who cannot join
- EMS personnel
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Video Emergency Calls of Bystanders - a Simulation Study
Emergency center dispatchers often face the challenge that emergency calls typically provide only verbal information. However, many first responders use smartphones, which could enable the option for video calls during emergencies. Leveraging this technology could offer control center staff additional insights, potentially transforming the way they manage emergency situations. Despite this, the impact of video emergency calls on call duration and user experience remains largely unexplored.
In this project, 20 control center employees will undergo a one-hour training session on a video emergency call system. After the training, each dispatcher will handle four simulated emergency calls-two via audio and two via video. To facilitate this, 80 first responders will be recruited from public spaces, such as shopping centers. These responders will face simulated emergencies, including epileptic seizures, shortness of breath, forehead lacerations, or injuries to the upper extremities with minor bleeding. Professional medical actors will simulate the emergencies, and the responders will be tasked with making either an audio or video emergency call.
- Conditions
- Audio-Emergency Call, Video-Emergency Call
- Being tested
- Video-Emergency, Audio-Emergency Call
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Video-EmergencyOther
Video Emergency Call using a webbased platform
Audio-Emergency CallOther
Audio Emergency Call
| Study group | Role | What they receive |
|---|---|---|
| Audio Emergency Call | Sham comparator | An Emergency Call will be performed Receives: Other: Audio-Emergency Call |
| Video-Emergency Call | Active comparator | Video-Emergency Call Receives: Other: Video-Emergency |
What is being measured
The primary outcome is the main question the study is designed to answer.
Duration of the Emergency Call
Measured: Up to 10 Minutes
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted19 Sep 2024
- Study start16 Sep 2024
- Primary completion31 Oct 2024
- Study completion28 Feb 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Audio-Emergency CallStudies of the same condition, open and under way.
- More trials run by Medical University of ViennaThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Health services research
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 80 participants (actual)
Sponsor and investigators
- Lead sponsor
- Medical University of Vienna
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Christina Hafner, Medical University of Vienna
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06598592
- Sponsor's protocol ID
- Video-Emergency-Call
- Status last verified
- Sep 2024
- First submitted
- 11 Sep 2024
- Last updated
- 2 Oct 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Krammel M, Degischer B, Kahlfuss F, Lintschinger JM, Reischmann L, Hribersek M, Gleiss A, Grassmann D, Hamp T, Lagara A, Glaninger P, Schnaubelt S, Hafner C. Live video versus audio-only emergency calls in simulated emergency medical dispatch: a randomized mixed-methods study. BMC Emerg Med. 2026 Apr 2;26(1):138. doi: 10.1186/s12873-026-01557-0.
PubMed 41928098
Study at a glance
From the registry record, last updated by the sponsor on 2 Oct 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Video Emergency Calls of Bystanders - a Simulation Study
- ClinicalTrials.gov ID
- NCT06598592
- Acronym / sponsor ID
- Video-Emergency-Call
- Conditions
- Audio-Emergency Call, Video-Emergency Call
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 80 participants (actual)
- Lead sponsor
- Medical University of ViennaUniversity, hospital or other
- Study start
- 16 Sep 2024 (actual)
- Primary completion
- 31 Oct 2024 (actual)
- Study completion
- 28 Feb 2025 (actual)
- First posted
- 19 Sep 2024 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Emergency center dispatchers often face the challenge that emergency calls typically provide only verbal information. However, many first responders use smartphones, which could enable the option for video calls during emergencies. Leveraging this technology could offer control center staff additional insights, potentially transforming the way they manage emergency situations. Despite this, the impact of video emergency calls on call duration and user experience remains largely unexplored.
In this project, 20 control center employees will undergo a one-hour training session on a video emergency call system. After the training, each dispatcher will handle four simulated emergency calls-two via audio and two via video. To facilitate this, 80 first responders will be recruited from public spaces, such as shopping centers. These responders will face simulated emergencies, including epileptic seizures, shortness of breath, forehead lacerations, or injuries to the upper extremities with minor bleeding. Professional medical actors will simulate the emergencies, and the responders will be tasked with making either an audio or video emergency call.
Study design
- Primary purpose
- Health services research
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Audio Emergency Call | Sham comparator | Other: Audio-Emergency CallAn Emergency Call will be performed |
| Video-Emergency Call | Active comparator | Other: Video-EmergencyVideo-Emergency Call |
Who may qualify
- Ages
- 18 to 70 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (3 listed)
- 18-70 years
- User of a smartphone
- German Language
Key exclusion criteria (1 listed)
- EMS personnel
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Video-EmergencyVideo Emergency Call using a webbased platform | Other | Video-Emergency Call |
| Audio-Emergency CallAudio Emergency Call | Other | Audio Emergency Call |
Primary outcome
Duration of the Emergency Call
Time frame: Up to 10 Minutes
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 2 Oct 2025.
- Derived from this study: PubMed 41928098Krammel M, Degischer B, Kahlfuss F, Lintschinger JM, Reischmann L, Hribersek M, Gleiss A, Grassmann D, Hamp T, Lagara A, Glaninger P, Schnaubelt S, Hafner C. Live video versus audio-only emergency calls in simulated emergency medical dispatch: a randomized mixed-methods study. BMC Emerg Med. 2026 Apr 2;26(1):138. doi: 10.1186/s12873-026-01557-0.
- Individual participant dataSharing planned: No
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Video-Emergency and Audio-Emergency Call in people with Audio-Emergency Call and Video-Emergency Call, run by Medical University of Vienna at 1 site in Austria.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 2 Oct 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Austria. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Duration of the Emergency Call (time frame: Up to 10 Minutes). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT06598592, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Oct 2025.