Feasibility of Doppler Ultrasound for Pulse Detection in Out-of-Hospital Cardiac Arrest Patients

NCT06249893 | Completed

• 1 other identifier: 1549/2023
• Study Type: observational
• Target: 75
• Locations: 1 country
• Sites: 1

Brief Summary

The goal of this prospective observational study is to investigate the feasibility of using doppler point-of-care ultrasound on the femoral artery with a portable device to assess the presence of a pulse in patients suffering from cardiac arrest in the out-of-hospital environment. The main question is how often researchers are successful in acquiring the necessary ultrasound signal in the out-of-hospital environment.

Conditions

Cardiac Arrest, Out-Of-Hospital

Keywords

Cardiac Arrest; Out-Of-Hospital Cardiac Arrest; OHCA; Ultrasound; Point-Of-Care Ultrasound; POCUS; Pulse Check; POCUS Pulse Check; Doppler Ultrasound; Femoral Artery

Outcome Measures

Primary Outcomes (1)

• Feasibility of femoral artery doppler ultrasound

  If an ultrasound image of the femoral artery of sufficient quality for Doppler ultrasound can be obtained, the primary outcome will be considered to be positive.

  During cardiac arrest, up to 45 minutes

Secondary Outcomes (5)

• Time until ultrasound signal acquisition

  During cardiac arrest, up to 45 minutes

• Discordance between doppler ultrasound and manual pulse checks.

  During cardiac arrest, up to 45 minutes

• Correlation of the result of manual pulse checks with doppler peak systolic velocity

  During cardiac arrest, up to 45 minutes

• Patient factors influencing probability of successful doppler ultrasound image acquisition

  After cardiac arrest, through study completion (a maximum of 1 year)

• Inter-observer variability in determining the quality of the doppler ultrasound signal.

  After cardiac arrest, through study completion (a maximum of 1 year)

Study Arms (1)

Included patients

Other: Point-of-care vascular ultrasound

Interventions

Point-of-care vascular ultrasound OTHER

Point-of-care ultrasound will be used to image the femoral vessels and to perform a pulsed-wave doppler measurement of blood flow during chest compressions and during pauses for rhythm and manual pulse checks.

Included patients

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

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.

You may qualify if:

• Out-of-hospital cardiac arrest treated by EMS
• Minimum age of 18 years

You may not qualify if:

• 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

Sponsors & Collaborators

• Medical University of Vienna: lead
• Ludwig Boltzmann Institute Digital Health and Patient Safety: collaborator
• Emergency Medical Service of Vienna: collaborator

Study Sites (1)

Emergency Medical Service of Vienna

Vienna, 1030, Austria

Location

MeSH Terms

Conditions

Out-of-Hospital Cardiac Arrest; Heart Arrest

Condition Hierarchy (Ancestors)

Heart Diseases; Cardiovascular Diseases

Study Officials

• Philipp Metelka, MD

  Medical University of Vienna

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: CASE ONLY
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Dr., Resident

Study Record Dates

• First Submitted: January 2, 2024
• First Posted: February 8, 2024
• Study Start: January 4, 2024
• Primary Completion: April 18, 2024
• Study Completion: April 18, 2024
• Last Updated: August 7, 2024

Record last verified: 2024-08

Locations

AU (1)