The Schmitz-Hinkelbein Method. A New Technique for CPR in Space.

The Schmitz-Hinkelbein Method. A New Method for the Performance of External Chest Compressions During Microgravity.

The risk of a severe medical event during long-duration spaceflight is significant and can endanger both the whole mission and crew. There is a certain risk for a cardiac arrest in space requiring cardiopulmonary resuscitation (CPR). So far, 5 known techniques to perform CPR in microgravity have been reported.

The aim of the present study was to describe and gather data for two new CPR techniques useful in microgravity.

Study Overview

• Status: Completed
• Conditions: Cardiac Arrest
• Intervention / Treatment: Procedure: External Chest Compressions on Manikin in Underwater Setting

Detailed Description

The risk of a severe medical event during long-duration spaceflight is significant and can endanger both the whole mission and crew. There is a certain risk for a cardiac arrest in space requiring cardiopulmonary resuscitation (CPR). So far, 5 known techniques to perform CPR in microgravity have been reported.

The aim of the present study was to describe and gather data for two new CPR techniques useful in microgravity.

The investigators conducted a randomized controlled manikin trial and asked 15 participants with valid diving-license to resuscitate a manikin in two different techniques of CPR in a free-floating position underwater. The first technique, (Schmitz-Hinkelbein-Method) is similar to conventional CPR, with the patient in a supine position on the performer's knees for stabilization. The second technique (Hinkelbein-Schmitz-Method) is similar to the first, but chest compressions are conducted with the elbow.

• Study Type: Interventional
• Enrollment (Actual): 15
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Germany
  • Northrhine-Westphalia
    • Cologne, Northrhine-Westphalia, Germany, 50937
      • University Hospital of Cologne

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (ADULT, OLDER_ADULT)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Valid diving-license(SSI - Open Water Diver (OWD), CMAS *, PADI Open Water Diver, ISO 24801-2 (Autonomous Diver), NAUI Scuba Diver or equal license
• German EMT-qualification

Exclusion Criteria:

• any acute or chronic ENT illness/injury
• no valid diving/EMT license

Study Plan

How is the study designed?

Design Details

• Primary Purpose: TREATMENT
• Allocation: RANDOMIZED
• Interventional Model: PARALLEL
• Masking: NONE

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
ACTIVE_COMPARATOR: Schmitz-Hinkelbein-Method	Procedure: External Chest Compressions on Manikin in Underwater Setting; Two different methods of CPR in an analogue model of mircogravity
ACTIVE_COMPARATOR: Hinkelbein-Schmitz-Method	Procedure: External Chest Compressions on Manikin in Underwater Setting; Two different methods of CPR in an analogue model of mircogravity

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
total number of chest compressions	defined as >2 cm of compression depth	60 seconds video clip with afterwards evaluation
number of correct chest compressions	defined as 50-60 mm of depth	60 seconds video clip with afterwards evaluation
compression rate	defined as any compression of the thorax	60 seconds video clip with afterwards evaluation
correct compression rate	defined as 100-120 compressions min-1	60 seconds video clip with afterwards evaluation
depth rate	defined as 50-60 mm of depth	60 seconds video clip with afterwards evaluation

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
no-flow-time	time without effective compression after the onset of chest compressions	60 seconds video clip with afterwards evaluation
thorax release	correct thorax release after compression	60 seconds video clip with afterwards evaluation
Self-Satisfaction-Score	Depth Frequency Feasibility Exhaustion All in All Quality	60 Seconds, Questionnaire filled out by participants after dive

Collaborators and Investigators

• Sponsor: Universitätsklinikum Köln

Publications and helpful links

General Publications

• Schmitz J, Ahlback A, DuCanto J, Kerkhoff S, Komorowski M, Low V, Russomano T, Starck C, Thierry S, Warnecke T, Hinkelbein J. Randomized Comparison of Two New Methods for Chest Compressions during CPR in Microgravity-A Manikin Study. J Clin Med. 2022 Jan 27;11(3):646. doi: 10.3390/jcm11030646.

Study record dates

Study Major Dates

• Study Start (ACTUAL): January 2, 2020
• Primary Completion (ACTUAL): March 30, 2020
• Study Completion (ACTUAL): April 1, 2020

Study Registration Dates

• First Submitted: April 2, 2020
• First Submitted That Met QC Criteria: April 20, 2020
• First Posted (ACTUAL): April 21, 2020

Study Record Updates

• Last Update Posted (ACTUAL): April 21, 2020
• Last Update Submitted That Met QC Criteria: April 20, 2020
• Last Verified: April 1, 2020

More Information

Terms related to this study

• Keywords: CPR; cardiopulmonary resuscitation
• Additional Relevant MeSH Terms: Heart Diseases; Cardiovascular Diseases; Heart Arrest
• Other Study ID Numbers: 19-1069_1

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No