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. Improper placement of the first and second tubes within the sequence valve during setup is prevented.

대표청구항 ▼

An IV administration system comprising: a first source of a first IV fluid; a second source of a second IV fluid; an IV control device having an inlet and an outlet for delivering IV fluids; a first flexible tube connected between the first source and the inlet; a second flexible tube connected betw

An IV administration system comprising: a first source of a first IV fluid; a second source of a second IV fluid; an IV control device having an inlet and an outlet for delivering IV fluids; a first flexible tube connected between the first source and the inlet; a second flexible tube connected between the second source and the inlet; a sequence valve positioned between the first and second sources and the inlet for selectively occluding the first and second flexible tubes in sequence, the sequence valve comprising: a base having channel means for receiving the first and second flexible tubes; crank means pivotally connected to the base for movment about a first pivot axis along a first path between first and second crank positions; bias means for providing a bias force to the crank means which urges the crank means toward the second crank position; occluder means connected to a first end of the crank means for occluding the first flexible tube when the crank means is in the first crank position, and for occluding the second flexible tube when the crank means is in the second crank position; releasable latch means connected to the base for latching the crank means in the first crank position and for releasing the crank means in response to a control signal to allow the bias force to pivot the crank means to the second crank position; tube retainer means connected to the base for pivoting about a second axis along a second path between an open position in which tubes can be inserted into or removed from the channel and a closed position which holds the tubes in the channel means; and gate means for pivoting about a third axis along a third path between an open position in which the first tube can be inserted into or removed from the channel means, and a closed position which holds the first tube in the channel means where the first, second and third axes are positioned so that at least two of the first, second and third paths intersect, wherein the gate means includes means for preventing the tube retainer means from moving along the second path to its closed position unless the gate means is in its closed position; and means for providing the control signal to the sequence valve.