Office of the Chief Health and Medical Officer (OCHMO) | Simple Site

General

Curiosity (Rover)

Exploration Systems Development Mission Directorate

Human Health and Performance

Human Spaceflight Mission Directorate

Human System Risks

Humans in Space

Johnson Space Center

Mars

Mars Campaign Development Division

Mars Climate Orbiter

Mars Exploration Rovers (MER)

Office of the Chief Health and Medical Officer (OCHMO)

Perseverance (Rover)

Sojourner (Rover)

The Human Body in Space

Establishing Crew Exposure Limits of Martian Dust

Background Human exploration of Mars will expose crews to a persistent, fine particulate environment whose physicochemical properties and health implications remain only partly understood.

Posted July 21, 2026

Office of the Chief Health and Medical Officer (OCHMO)

General

Human Health and Performance

Human System Risks

Humans in Space

The Human Body in Space

Establishing a VTE Risk Score for Astronauts Algorithm

In April 2026, NASA’s Office of the Chief Health and Medical Officer (OCHMO) initiated a working group to review updated VTE case information, additional data gathered revealing altered blood flow status within a cohort of astronauts, and discuss progress of research and clinical activities intended to mitigate the risk of VTE during spaceflight wi

Posted July 18, 2026

Office of the Chief Health and Medical Officer (OCHMO)

General

Human Health and Performance

Humans in Space

The Human Body in Space

Risk of Venous Thromboembolism During Spaceflight

In October 2024, NASA’s Office of the Chief Health and Medical Officer (OCHMO) initiated a working group to review the status and progress of research and clinical activities intended to mitigate the risk of venous thromboembolism (VTE) during spaceflight.

Posted March 15, 2025

Office of the Chief Health and Medical Officer (OCHMO)

Human Health and Performance

Humans in Space

The Human Body in Space

Hydrogen Sulfide (H2S) Independent Assessment

NASA’s Office of the Chief Health and Medical Officer (OCHMO) assembled a small working group to review hydrogen sulfide (H2S) Spacecraft Maximum Allowable Concentration (SMAC) values. The group met virtually three times during February and March 2023, and panel members submitted individual opinion statements in April 2023.

Posted January 17, 2025

Office of the Chief Health and Medical Officer (OCHMO)

Human Health and Performance

Humans in Space

International Space Station (ISS)

Assessment of PFO as Related to DCS in the Spaceflight Environment and During Ground Testing

In June 2024, the NASA Office of the Chief Health and Medical Officer (OCHMO) Standards Team hosted an independent assessment working group to review the status and progress of research and clinical activities intended to mitigate the risk of decompression sickness (DCS) related to patent foramen ovale (PFO) during spaceflight and associated ground

Posted December 31, 2024

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80

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22

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8

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26

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4

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9

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378

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29

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1

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1

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38

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8

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26

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21

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3

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22

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30

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77

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18

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4

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29

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4

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1

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47

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4

7

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114

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84

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22

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4

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28

8

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2

1

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1

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30

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11

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297

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42

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44

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7

29

6

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47

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7

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4

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1

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18

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29

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6

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19

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10

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17

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8

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1

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1

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3

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1

1

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5

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3

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1

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20

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7

6

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15

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9

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2

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28

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16

1

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11

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3

39

134

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11

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21

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17

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4

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11

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33

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54

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4

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6

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51

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35

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13

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59

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3

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2

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18

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2

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1

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74

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3

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3

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45

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203

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6

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