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| Name | Class |
|---|---|
| Centre National d'Etudes Spatiales | OTHER_GOV |
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In a non-randomized, controlled, cross-over simulation study, the investigators evaluated and compared intubation performance of trained operators, using either a conventional laryngoscope in an ice-pick position or a video laryngoscope in a free-floating classic position, in weightlessness and in normogravity.
Data were analyzed with the generalized linear mixed-effects models.
Primary endpoint was the success rate of tracheal intubation. Time to intubation and the confidence score into the success of tube placement were also recorded as secondary endpoints.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Direct laryngoscopy in the ice-pick position | Experimental | In this arm, participants are assigned to intubations attempts in weightlessness on a manikin. The insertion of a 7.0 mm cuffed oro-tracheal tube was performed by using a direct laryngoscope with a Macintosh non-angulated size 3 blade, in a "face-to-face" or ice-pick position. |
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| Video-laryngoscopy in free-floating position | Experimental | In this arm, participants are assigned to intubations attempts in weightlessness on a manikin. The insertion of a 7.0 mm cuffed oro-tracheal tube was performed by using a video laryngoscopy in a semi-free-floating position (McGrath model, Covidienâ„¢, Medtronicâ„¢). |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Videolaryngoscopy / Direct Laryngoscopy | Device | First pass success analysis |
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| Measure | Description | Time Frame |
|---|---|---|
| First pass success | Bi-pulmonary ventilation success was assessed by the intubating operator performing chest auscultation and by the measurement of a tidal volume on the mannequin's electronic sensors. Selective side intubation was considered as failure | 1 day (1 flight) |
| Measure | Description | Time Frame |
|---|---|---|
| Time | The duration (seconds) of each attempt was recorded and ended with vocal confirmation of tube placement from the intubating operator or at the end of the parabola | 1 day (1 flight) |
| Confidence Score |
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Inclusion Criteria:
Healthy volunteers
Exclusion Criteria before the flight
Exclusion Criteria during the flight
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| Name | Affiliation | Role |
|---|---|---|
| Séamus Thierry, MD | Groupe Hospitalier de Bretagne Sud | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Groupe Hospitalier de Bretagne Sud | Lorient | 56100 | France |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 37684267 | Derived | Thierry S, Jaulin F, Starck C, Aries P, Schmitz J, Kerkhoff S, Bernard CI, Komorowski M, Warnecke T, Hinkelbein J. Evaluation of free-floating tracheal intubation in weightlessness via ice-pick position with a direct laryngoscopy and classic approach with indirect videolaryngoscopy. NPJ Microgravity. 2023 Sep 8;9(1):73. doi: 10.1038/s41526-023-00314-y. |
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All relevant data, anonymized, will be available from Dr S.Thierry on request
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A simulation study, in which participants alternatively perform oro-tracheal intubation on a manikin, either using a videolaryngoscope (McGrath model, Medtronic TM) or a direct laryngoscope
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A subjective score of confidence in the correct tube placement was recorded after each attempt and ranked from minus ten (complete certainty about failure) to plus ten (complete certainty about success). A score of zero was pronounced by the operator when he/she had maximum uncertainty about success or failure.
| 1 day (1 flight) |