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Carbon Dioxide Physiological Training at NASA.

Jennifer Law, Millennia Young, David Alexander

Aerospace Medicine and Human Performance

|September 20, 2017

Summary

This summary is machine-generated.

Astronauts train with carbon dioxide (CO2) exposure to recognize symptoms. Training reveals wide variations in reported symptoms, with respiratory issues most common, and suggests refresher training is needed.

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Area of Science:

Aerospace Medicine
Human Physiology
Occupational Health

Background:

Astronauts require training to identify acute symptoms from carbon dioxide (CO2) exposure.
This training is crucial for both ground simulations and in-flight scenarios.

Purpose of the Study:

To describe NASA's acute CO2 exposure training protocol.
To analyze symptoms reported by astronauts during this training.

Main Methods:

Astronauts were exposed to up to 8% CO2 (60 mmHg) using a rebreathing apparatus in a controlled setting.
Symptoms were documented using standardized forms over a period of 18 years (April 1994 - February 2012).

Main Results:

Data from 130 astronauts showed symptom reporting varied with age and sex; older individuals and women reported more symptoms on average.
The most frequent symptoms were respiratory (90%), flushing/sweating (56%), and dizziness (43%).
Respiratory symptoms were consistently reported across multiple training sessions.

Conclusions:

CO2 exposure training effectively educates astronauts on potential symptoms.
Significant interindividual variability in symptoms necessitates personalized recognition and response strategies.
Periodic refresher training is recommended due to symptom variability over time and the need to inform operational decisions.