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Spatial Volume Necessary to Perform Open Appendectomy in a Spacecraft.

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    Performing an appendectomy in space is feasible, requiring a minimum of 2.87 m³. This volume is comparable to current spacecraft, highlighting the need for surgical preparedness in space exploration.

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    Area of Science:

    • Space Medicine
    • Surgical Procedures
    • Aerospace Engineering

    Background:

    • Increased crewed spaceflight necessitates planning for surgical emergencies.
    • Appendicitis is a common surgical condition, and appendectomy is the standard procedure.
    • Current spacecraft have limited habitable volumes, ranging from 4 m³ to 425 m³.

    Purpose of the Study:

    • To determine the minimum volume required for performing an appendectomy.
    • To compare this required volume with existing spacecraft habitable volumes.

    Main Methods:

    • Simulated operating room used to measure volume requirements.
    • Surgeons and a physician performed a Focused Assessment with Sonography for Trauma and appendectomy on a simulated patient.
    • Volume measurements were collected and analyzed using unpaired t-tests.

    Main Results:

    • The mean volume needed for an appendectomy was 3.83 m³ (standing) and 3.68 m³ (kneeling).
    • The minimal volume required was 3.20 m³ (standing) and 3.26 m³ (kneeling).
    • Theoretical minimal volume ranged from 2.87 m³ to 2.99 m³.

    Conclusions:

    • An open appendectomy may be feasible in spacecraft as small as 4 m³ (Soyuz-MS).
    • Spacecraft operating without rapid evacuation capabilities must consider surgical emergency preparedness.
    • Further research is needed on microgravity effects and procedure standardization for novice space surgeons.