 Patient security issues are more critical for injured astronauts than for uninjured personnel.Additionally, depending on the nature of the injury, it may be unlikely that the patient could be placed in an environmentally contained space suit or minicapsule, therefore the CRV needs to have the capability to provide a "shirt sleeve" environment.The ability to address air purity issues is included in this requirement, as air purity is especially critical in medical as well as toxic exposure situations.