Cooperation of platen and pump cassette for pump device

Abstract

A pumping mechanism includes a housing containing the pumping mechanism, the housing defining a seat configured to receive a pump cassette having a fluid lumen that can be acted upon by the pumping mechanism so as to pump fluid through the fluid lumen of the pump cassette. A platen pad is movably attached to the housing mechanism, wherein the platen pad can movably adjust in position relative to the pump cassette as the pump cassette is secured in the seat of the housing.

1 . A pump device, comprising:
 a pumping mechanism;   a housing containing the pumping mechanism, the housing defining a seat configured to receive a pump cassette having a fluid lumen that can be acted upon by the pumping mechanism so as to pump fluid through the fluid lumen of the pump cassette;   a platen pad movably attached to the housing mechanism, wherein the platen pad can movably adjust in position relative to the pump cassette as the pump cassette is secured in the seat of the housing.   
     
     
         2 . A pump device as in  claim 1 , further comprising a door movably attached to the housing, wherein the platen pad is movably mounted in the door. 
     
     
         3 . A pump device as in  claim 2 , wherein the door is rotatably attached to the housing. 
     
     
         4 . A pump device as in  claim 2 , wherein the platen pad is spring-mounted in the door. 
     
     
         5 . A pump device as in  claim 1 , wherein the pump cassette defines a platen. 
     
     
         6 . A pump device as in  claim 1 , wherein the pumping mechanism is a peristaltic pumping mechanism. 
     
     
         7 . A pump device as in  claim 1 , further comprising:
 the pump cassette for coupling with the pump device, the pump cassette comprising: a fluid lumen adapted for passage of an infusion fluid toward a patient; a valve assembly that can be actuated to regulate fluid flow through the fluid lumen; and a frame coupled to the fluid lumen and the valve assembly, the frame adapted to be inserted into a seat of a pump device.   
     
     
         8 . A pump device as in  claim 2 , wherein the door transitions between an open position wherein the seat is exposed for receipt of the pump cassette and a closed position wherein the door secures the pump cassette within the seat. 
     
     
         9 . A pump device as in  claim 8 , further comprising a door actuator configured to transitioned to a locked state that locks the door in the closed position, wherein the door actuator is configured to automatically transition a valve assembly of the pump cassette to the open state when the door actuator is transitioned to the locked state. 
     
     
         10 . A pump device as in  claim 9 , wherein the door actuator automatically transitions the valve assembly to the off state when the door actuator is transitioned to the unlocked state. 
     
     
         11 . A device as in  claim 7 , wherein the pump cassette can only be inserted into the seat when the pump cassette is aligned in a predetermined orientation relative to the seat. 
     
     
         12 . A method of coupling a pump cassette with a pump device, comprising:
 inserting the pump cassette into a seat of the pump device;   closing a door of the pump device to secure the pump cassette in the seat, wherein the door includes a platen pad that adjusts in position relative to the pump as the door is closed.   
     
     
         13 . A method as in  claim 12 , further comprising locking the door, wherein locking the door automatically causes a valve of the pump cassette to open. 
     
     
         14 . A method as in  claim 12 , further comprising unlocking the door, wherein locking the door automatically causes a valve of the pump cassette to close. 
     
     
         15 . A method as in  claim 12 , further comprising activating a pump mechanism of the pump device such that the pump mechanism cooperates with the pump cassette and the platen pad to pump fluid through the pump device. 
     
     
         16 . A method as in  claim 12 , wherein closing the door comprises rotating the door from an open position to a closed position. 
     
     
         17 . A method as in  claim 12 , wherein the pump cassette comprises a fluid lumen adapted for passage of an infusion fluid toward a patient; a valve assembly that can be actuated to regulate fluid flow through the fluid lumen; and a frame coupled to the fluid lumen and the valve assembly, the frame adapted to be inserted into a seat of a pump device.