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| Name | Class |
|---|---|
| Ludwig Boltzmann Institute Digital Health and Patient Safety | OTHER |
| Emergency Medical Service of Vienna | UNKNOWN |
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The goal of this prospective observational study is to investigate B-mode point-of care ultrasound with arterial compressibility assessment on the femoral artery as a method to determine the presence of a pulse and to compare it with concurrently conducted manual pulse checks.
In this prospective observational study, a dedicated research team will be dispatched to cardiac arrest patients treated in the prehospital environment by emergency medical services (EMS). The team will use a portable ultrasound device to identify the femoral artery and employ B-mode ultrasound during rhythm checks. These ultrasound pulse checks will be conducted in parallel with the normal treatment of the patient, including manual pulse checks, and will only be conducted if ultrasound is possible without interference in the resuscitation. All treatment decisions will rest with the treating EMS team.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Included patients |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Point of Care Ultrasound | Other | Point-of-care ultrasound will be used to image the femoral vessels and to assess the presence or absence of a pulse and the compressibility of the artery during rhythm checks. |
| Measure | Description | Time Frame |
|---|---|---|
| Results of POCUS pulse check | If the femoral artery is both non-compressible and pulsatile, the POCUS pulse check will be considered positive | During cardiac arrest, up to 45 minutes |
| Results of the concurrently conducted manual pulse check | Parallel to our study team the treating team will conduct standard care, consisting of determining the presence or absence of a pulse by palpation. The results of these manual pulse checks will be recorded by our study team. | During cardiac arrest, up to 45 minutes |
| Measure | Description | Time Frame |
|---|---|---|
| Arterial compressibility during chest compressions | Before each pulse check, during the last 30 seconds of cardiac compressions, the research team will apply pressure with the ultrasound probe until complete collapse of the femoral vein and visually assess if the neighbouring femoral is compressible as well. | During cardiac arrest, up to 45 minutes |
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Inclusion Criteria:
Exclusion Criteria:
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The study population comprises non-pregnant adults suffering out-of-hospital cardiac arrest of any cause who are treated with CPR by emergency medical services.
| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Philipp Metelka, MD | Contact | +43 699 10659528 | philipp.metelka@meduniwien.ac.at | |
| Christina Hafner, MD, PhD | Contact | christina.hafner@meduniwien.ac.at |
| Name | Affiliation | Role |
|---|---|---|
| Philipp Metelka, MD | Medical University of Vienna | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Emergency Medical Service of Vienna | Recruiting | Vienna | 1030 | Austria |
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| ID | Term |
|---|---|
| D058687 | Out-of-Hospital Cardiac Arrest |
| D006323 | Heart Arrest |
| ID | Term |
|---|---|
| D006331 | Heart Diseases |
| D002318 | Cardiovascular Diseases |
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| Arterial compressibility during rhythm checks | The compressibility of the femoral artery during rhythm checks (part of the "POCUS pulse check" primary outcome) will be recorded and analysed, independently of pulsatility | During cardiac arrest, up to 45 minutes |
| Arterial pulsatility during rhythm checks | The pulsatility of the femoral artery during rhythm checks (part of the "POCUS pulse check" primary outcome) will be recorded and analysed, independently of compressibility | During cardiac arrest, up to 45 minutes |
| Time needed for POCUS pulse checks | The POCUS pulse checks will be recorded and the time until presence or absence of a pulse could be determined will be recorded in seconds | During cardiac arrest, up to 45 minutes |