EchocardiographyNCT04817488
Live Stream of Prehospital Emergency Ultrasound in Patients With Acute Dyspnoea
An observational study of Echocardiography and Acute Dyspnea, run by Medical University of Vienna at 1 site in Austria.
Trial summary
Background: Acute dyspnoea is a common symptom in prehospital emergency medicine. As ultrasound gained in importance for diagnosis in patients with acute respiratory distress, it plays even a role in the prehospital setting. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Echocardiography, Acute Dyspnea
- What is being tested?
- Prehospital emergency ultrasound with tele-supervision and Prehospital emergency ultrasound without tele-supervision
- How many people
- 350 participants
- Where
- 1 siteAustria
- Study dates
- 1 Jul 2021to 31 Dec 2026
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
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 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: 350 critically ill patients with acute dyspnoea will be included in this study. In 175 patients ultrasound with tele-supervision and in 175 patients ultrasound without tele-supervision will be performed. Allocation to one of the two groups depends on the availability of tele-supervision. Tele-supervision is available in 50% of the time.
Who may be able to join
- Patients will be included, if they suffer from acute dyspnoea and at least one of the two following signs of respiratory failure:
- Respiratory rate >20 breaths per minute
- Peripheral oxygen saturation without oxygen supplementation <90%
Who cannot join
- under the age of 18
- if PEU will lead to a delay of live-saving treatment or transportation
- if patient rejects the PEU, the patient will be excluded
Trial locations and contacts
1 site in 1 country.
Austria1 site
Medical University of Vienna, Department of Anaesthesia & General Intensive Care
Vienna, 1090
About this study
Background: Acute dyspnoea is a common symptom in prehospital emergency medicine. As ultrasound gained in importance for diagnosis in patients with acute respiratory distress, it plays even a role in the prehospital setting. However, prehospital emergency ultrasound (PEU) remains challenging and requires knowledge and skills. New prehospital ultrasound devices offer the possibility for tele-supervision. The impact of tele-supervision of PEU in patients with acute dyspnoea is unclear.
Objective: This prospective observational study aims to evaluate the effect of PEU with tele-supervision on diagnosis, treatment strategies and cognitive load in comparison to PEU without tele-supervision in patients with acute dyspnoea.
Methods: In total 350 prehospital emergency patients with acute dyspnoea will be included in this study. Patients will be observed in two groups. In group 1 PEU will be performed with tele-supervision, whereas in group 2 PEU will be performed without tele-supervision (tele-supervision not available).
- Conditions
- Echocardiography, Acute Dyspnea
- Being tested
- Prehospital emergency ultrasound with tele-supervision, Prehospital emergency ultrasound without tele-supervision
- Keywords
- Ultrasound diagnostics, Prehospital emergency medicine
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Prehospital emergency ultrasound with tele-supervisionOther
Prehospital emergency ultrasound with tele-supervision in patients with acute dyspnoea
Prehospital emergency ultrasound without tele-supervisionOther
Prehospital emergency ultrasound without tele-supervision in patients with acute dyspnoea
| Study group | Role | What they receive |
|---|---|---|
| Prehospital emergency ultrasound with tele-supervision | Prehospital emergency ultrasound of patients with acute dyspnea will be performed with tele-supervision. Receives: Other: Prehospital emergency ultrasound with tele-supervision | |
| Prehospital emergency ultrasound without tele-supervision | Prehospital emergency ultrasound of patients with acute dyspnea will be performed without tele-supervision. Receives: Other: Prehospital emergency ultrasound without tele-supervision |
What is being measured
The primary outcome is the main question the study is designed to answer.
Accuracy of prehospital diagnosis after PEU in relation to the (correct) in-hospital diagnosis
The aim of this study is to compare the accuracy of a prehospital emergency ultrasound (PEU) done with or without tele-supervison in patients suffering from acute dyspnoea and evaluate the accuracy of the diagnosis in relation to the (correct) in-hospital diagnosis.
Measured: through study completion, an average of 1 year
Secondary outcomes (2)
Agreement of diagnosis before PEU and after PEU
Is there an agreement between the diagnosis before performing the prehospital emergency ultrasound (PEU) and after performing it.
Measured: through study completion, an average of 1 year
Duration of prehospital emergency ultrasound (PEU)
Duration of prehospital emergency ultrasound (PEU)
Measured: through study completion, an average of 1 year
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted26 Mar 2021
- Study start1 Jul 2021
- Primary completion31 Dec 2026 (estimated)
- Study completion31 Dec 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for EchocardiographyStudies 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
- Observational
- Observational model
- Case-control
- Time perspective
- Prospective
- Enrolment
- 350 participants (estimated)
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
- Investigators
- Department of Anaesthesia & General Intensive Care, Study chair, Medical University of Vienna
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04817488
- Sponsor's protocol ID
- 2411/2020
- Status last verified
- Apr 2026
- First submitted
- 23 Mar 2021
- Last updated
- 20 Apr 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Study at a glance
From the registry record, last updated by the sponsor on 20 Apr 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Live Stream of Prehospital Emergency Ultrasound in Patients With Acute Dyspnoea
- ClinicalTrials.gov ID
- NCT04817488
- Acronym / sponsor ID
- 2411/2020
- Conditions
- Echocardiography, Acute Dyspnea
- Keywords
- Ultrasound diagnostics, Prehospital emergency medicine
- Study type
- Observational
- Recruitment status
- Active, not recruiting
- Enrolment
- 350 participants (estimated)
- Lead sponsor
- Medical University of ViennaUniversity, hospital or other
- Study start
- 1 Jul 2021 (actual)
- Primary completion
- 31 Dec 2026 (estimated)
- Study completion
- 31 Dec 2026 (estimated)
- First posted
- 26 Mar 2021 (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.
Background: Acute dyspnoea is a common symptom in prehospital emergency medicine. As ultrasound gained in importance for diagnosis in patients with acute respiratory distress, it plays even a role in the prehospital setting. However, prehospital emergency ultrasound (PEU) remains challenging and requires knowledge and skills. New prehospital ultrasound devices offer the possibility for tele-supervision. The impact of tele-supervision of PEU in patients with acute dyspnoea is unclear.
Objective: This prospective observational study aims to evaluate the effect of PEU with tele-supervision on diagnosis, treatment strategies and cognitive load in comparison to PEU without tele-supervision in patients with acute dyspnoea.
Methods: In total 350 prehospital emergency patients with acute dyspnoea will be included in this study. Patients will be observed in two groups. In group 1 PEU will be performed with tele-supervision, whereas in group 2 PEU will be performed without tele-supervision (tele-supervision not available).
Study design
- Observational model
- Case-control
- Time perspective
- Prospective
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Prehospital emergency ultrasound with tele-supervision | – | Other: Prehospital emergency ultrasound with tele-supervisionPrehospital emergency ultrasound of patients with acute dyspnea will be performed with tele-supervision. |
| Prehospital emergency ultrasound without tele-supervision | – | Other: Prehospital emergency ultrasound without tele-supervisionPrehospital emergency ultrasound of patients with acute dyspnea will be performed without tele-supervision. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- 350 critically ill patients with acute dyspnoea will be included in this study. In 175 patients ultrasound with tele-supervision and in 175 patients ultrasound without tele-supervision will be performed. Allocation to one of the two groups depends on the availability of tele-supervision. Tele-supervision is available in 50% of the time.
Key inclusion criteria (3 listed)
- Patients will be included, if they suffer from acute dyspnoea and at least one of the two following signs of respiratory failure:
- Respiratory rate >20 breaths per minute
- Peripheral oxygen saturation without oxygen supplementation <90%
Key exclusion criteria (3 listed)
- under the age of 18
- if PEU will lead to a delay of live-saving treatment or transportation
- if patient rejects the PEU, the patient will be excluded
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 |
|---|---|---|
| Prehospital emergency ultrasound with tele-supervisionPrehospital emergency ultrasound with tele-supervision in patients with acute dyspnoea | Other | Prehospital emergency ultrasound with tele-supervision |
| Prehospital emergency ultrasound without tele-supervisionPrehospital emergency ultrasound without tele-supervision in patients with acute dyspnoea | Other | Prehospital emergency ultrasound without tele-supervision |
Primary outcome
Accuracy of prehospital diagnosis after PEU in relation to the (correct) in-hospital diagnosis
Time frame: through study completion, an average of 1 year
The aim of this study is to compare the accuracy of a prehospital emergency ultrasound (PEU) done with or without tele-supervison in patients suffering from acute dyspnoea and evaluate the accuracy of the diagnosis in relation to the (correct) in-hospital diagnosis.
2 secondary outcomes
Agreement of diagnosis before PEU and after PEU
Time frame: through study completion, an average of 1 year
Duration of prehospital emergency ultrasound (PEU)
Time frame: through study completion, an average of 1 year
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 20 Apr 2026.
- Individual participant dataSharing planned: Undecided
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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.
Department of Anaesthesia & General Intensive Care study chair
Medical University of Vienna
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Echocardiography and Acute Dyspnea, 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 3 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: under way, not looking for participants, as of the sponsor's last update on 20 Apr 2026. 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. 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?
This study is still under way. Results are not available in the source record yet.
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?
Accuracy of prehospital diagnosis after PEU in relation to the (correct) in-hospital diagnosis (time frame: through study completion, an average of 1 year). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
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 20 Apr 2026.