Pulse Checks Using Femoral Artery B-Mode Ultrasound With Compressibility Assessment
- Conditions
- Cardiac Arrest, Out-Of-Hospital
- Interventions
- Other: Point of Care Ultrasound
- Registration Number
- NCT06491186
- Lead Sponsor
- Medical University of Vienna
- Brief Summary
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.
- Detailed Description
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.
Recruitment & Eligibility
- Status
- RECRUITING
- Sex
- All
- Target Recruitment
- 69
- Out-of-hospital cardiac arrest treated by EMS
- Minimum age of 18 years
- Pregnancy or suspected pregnancy
- Disapproval of the treating EMS team
- Adults under legal guardianship
- Inability to perform femoral artery doppler ultrasound due to limited access to the patient and possible interference with the treating EMS team
- Inability to perform femoral artery doppler ultrasound due to injuries or anatomic abnormalities in the femoral region or necessary emergent medical interventions in the femoral region
- Decision to transfer the patient to the hospital with ongoing CPR for emergent procedures such as extracorporeal CPR before femoral artery doppler ultrasound could be attempted
- Inability to safely perform femoral artery doppler ultrasound due to environmental hazards
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Arm && Interventions
Group Intervention Description Included patients Point of Care Ultrasound -
- Primary Outcome Measures
Name Time Method Results of the concurrently conducted manual pulse check During cardiac arrest, up to 45 minutes 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.
Results of POCUS pulse check During cardiac arrest, up to 45 minutes If the femoral artery is both non-compressible and pulsatile, the POCUS pulse check will be considered positive
- Secondary Outcome Measures
Name Time Method Arterial compressibility during rhythm checks During cardiac arrest, up to 45 minutes 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
Arterial pulsatility during rhythm checks During cardiac arrest, up to 45 minutes 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
Arterial compressibility during chest compressions During cardiac arrest, up to 45 minutes 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.
Time needed for POCUS pulse checks During cardiac arrest, up to 45 minutes 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
Trial Locations
- Locations (1)
Emergency Medical Service of Vienna
🇦🇹Vienna, Austria