Task Book: Biological & Physical Sciences Division and Human Research Program
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Project Title:  Medical Oxygen Delivery System in Exploration Atmosphere Minimizing the Risk of Fire (Postdoctoral Fellowship) Reduce
Fiscal Year: FY 2020 
Division: Human Research 
Research Discipline/Element:
Start Date: 09/01/2020  
End Date: 08/31/2022  
Task Last Updated: 10/22/2020 
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Principal Investigator/Affiliation:   Rahman, Arifur  Ph.D. / University of Hawaii, Honolulu 
Address:  Department of Electrical Engineering 
Honolulu , HI 96822 
Phone: 808-308-3275  
Congressional District:
Organization Type: UNIVERSITY 
Organization Name: University of Hawaii, Honolulu 
Joint Agency:  
Ohta, Aaron  Ph.D. MENTOR: University of Hawaii, Honolulu 
Project Information: Grant/Contract No. NNX16AO69A-P0504 
Responsible Center: TRISH 
Grant Monitor:  
Center Contact:   
Solicitation / Funding Source: 2020 TRISH-RFA-2001-PD: Translational Research Institute for Space Health (TRISH) Postdoctoral Fellowships 
Grant/Contract No.: NNX16AO69A-P0504 
Project Type: GROUND 
Flight Program:  
TechPort: Yes 
No. of Post Docs:
No. of PhD Candidates:  
No. of Master's Candidates:  
No. of Bachelor's Candidates:  
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No. of Master's Degrees:  
No. of Bachelor's Degrees:  
Human Research Program Elements: None
Human Research Program Risks: None
Human Research Program Gaps: None

Astronaut’s health is critical to the success of space exploration missions. Hence, onboard medical interventions may require addressing planned and unplanned health issues. Besides, NASA’s recent change in Exploration Atmosphere to 8.2 psia and 34% Oxygen (O2) increased the risk of mild hypobaric hypoxia. The primary treatment for hypoxia is the administration of supplementary medical-grade oxygen, most commonly through the means of an oxygen mask. Currently, NASA uses a portable oxygen ventilator to supply medical grade oxygen which increases the oxygen concentration of the closed vehicle due to oxygen-enriched exhalation by the patient, which increases the likelihood of fire. This research effort aims to design an oxygen delivery system that is able to reversibly absorb the oxygen from the exhaled air of the patient through a chemical reaction. The system is comprised of an airtight, soft-cushioned, transparent, and low breathing resistance mask. The air inlet of the mask is connected to the ventilator, and the outlet is connected to a reservoir bag through a valve which allows the air to flow unidirectional out from the mask. The other end of the reservoir bag is fitted with an electric valve controlled by the signal from an embedded Zirconium oxygen sensor. The valve remains closed when the oxygen concentration inside the bag is higher than room air restricting the oxygen-enriched air to mix with room air. In addition, the inner surface of the reservoir bag is coated with cationic multimetallic crystalline cobalt complexes ([{CO2(bpdp)(O2)}2(bdc)] (BF4)4.5H2O.MeOH(2a(BF4)4.5H2O.MeOH)) which reversibly, selectively, and stoichiometrically chemisorb dioxygen from the air exhaled by the patient. Dioxygen absorption by BF4¯ salt is a reversible process where complete desorption takes place when the salt is heated to 120ºC. An indium tin oxide (ITO) coated transparent heater fabricated over the reservoir facilitates the oxygen desorption in case the BF4¯ salt is saturated.

Research Impact/Earth Benefits:

Task Progress & Bibliography Information FY2020 
Task Progress: New project for FY2020.

Bibliography Type: Description: (Last Updated: )  Show Cumulative Bibliography Listing
 None in FY 2020