초록 ▼

A piggyback IV administration system uses a solenoid actuated sequence valve to control the flow of fluid from a pair of IV fluid sources to the inlet of an IV pump or controller. The sequence valve pinches off a first tube while allowing fluid to flow through the second tube and then, in response t

A piggyback IV administration system uses a solenoid actuated sequence valve to control the flow of fluid from a pair of IV fluid sources to the inlet of an IV pump or controller. The sequence valve pinches off a first tube while allowing fluid to flow through the second tube and then, in response to a control signal, changes state so that the second tube is pinched off and fluid can flow through the first tube unimpeded. The sequence valve automatically senses conditions which indicate a failure of the sequence valve to occlude the second tube when the valve changes state.

대표청구항 ▼

A sequence valve for selectively occluding first and second flexible tubes in sequence, the sequence valve comprising: spring biased pivotable tube pincher means for pinching off the first and then the second flexible tube; pivotable latch means for holding the tube pincher in a position in which th

A sequence valve for selectively occluding first and second flexible tubes in sequence, the sequence valve comprising: spring biased pivotable tube pincher means for pinching off the first and then the second flexible tube; pivotable latch means for holding the tube pincher in a position in which the first tube is pinched off; a solenoid means which releases the latch in response to a control signal to permit the latch to pivot out of engagement with the tube pincher and thereby allow the tube pincher to pivot to a position in which the second tube is pinched off; and means for sensing a condition indicative of a failure of the tube pincher to pinch off the second tube and providing a signal in response thereto.