| 主权项 |
1. A patient support for supporting a patient, said patient support comprising:
an inflatable mattress; a pneumatic system for inflating the inflatable mattress, said pneumatic system including a CPR valve that is manually actuatable between a closed configuration, where a flow of air from the mattress is blocked at the CPR valve, and an open position, where the air can flow from the mattress through the CPR valve, and further configured to auto reset to its closed position after a CPR event; and wherein said CPR valve comprises a housing comprising a first chamber in fluid communication with said mattress, and a second chamber in selective fluid communication with the atmosphere, said housing including a check valve and an electrically controlled valve in fluid communication with said second chamber, said housing further including a piston movable between said first and second chambers and a spring in said second chamber, said housing further including an outlet, said spring biasing said piston to a closed position wherein said outlet is isolated from the first chamber, said piston being coupled to an actuator, which when actuated moves said piston against the force of said spring and past said outlet so that said first chamber is in communication with the atmosphere and the air from the mattress can discharge through the outlet through the first chamber, when the piston is moved to its open position air from said second chamber is discharged though said check valve, which generates a vacuum in the second chamber and which holds the piston in its open position, and the electrically controlled valve being configured to be selectively opened to release the vacuum pressure in said second chamber thereby allowing said spring to return said piston to its closed position to auto reset the CPR valve. |
