US 4,044,758 AGranted

Cholangiography device and method

AssigneeThe Kendall Company

InventorBhupendra C. Patel

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Abstract

A device for use in cholangiography and similar procedures comprising, a syringe having a barrel defining a chamber. The syringe has a plunger having one end received in a proximal end of the syringe chamber for pumping liquid from the chamber, a floating barrier received in the chamber and defining a first compartment intermediate the barrier and a distal end of the chamber for retaining an irrigation liquid and a second compartment intermediate the barrier and the one end of the plunger for retaining a liquid contrast medium. The device has a catheter having a distal end, a proximal end, and a lumen extending through the catheter. The device has a liquid receiving receptacle having a chamber, means for selectively connecting the syringe to the catheter lumen and the receptacle chamber, and means for establishing communication between the connecting means and the second compartment when the barrier is located adjacent the distal end of the chamber.

Claims22

Dependent claims

A device for use in cholangiography and similar procedures, comprising:

a syringe having a barrel defining a chamber, a plunger having one end received in a proximal end of the syringe chamber for pumping liquid from the chamber, a floating barrier received in the chamber and defining a first compartment intermediate the barrier and a distal end of the chamber for retaining an irrigation liquid and a second compartment intermediate the barrier and said one end of the plunger for retaining a liquid contrast medium;
a catheter having a distal end, a proximal end, and a lumen extending through the catheter;
a liquid receiving receptacle having a chamber;
means for selectively connecting the syringe to the catheter lumen and the receptacle chamber;
and
means for establishing communication between the connecting means and said second compartment when said barrier is located adjacent the distal end of the chamber, whereby an initial portion of the irrigation liquid may be pumped through the catheter, a remaining portion of the irrigation liquid may be pumped into the receptacle chamber until the barrier is located adjacent the distal end of the syringe chamber to establish communication with the second compartment, and the liquid contrast medium may be pumped through the catheter lumen without introducing air into the device.

3 more elements

For a syringe of the type having a barrel defining a chamber, a plunger having one end received in a proximal end of the chamber, a floating barrier received in the chamber and defining a first compartment intermediate the barrier and a distal end of the chamber for retaining a first liquid and a second compartment intermediate the barrier and said one end of the plunger for retaining a second liquid, the distal end of the chamber having a passageway therethrough, and a hollow needle positioned in the passageway and projecting a sufficient distance into the chamber to puncture the barrier when the barrier is located adjacent the distal end of the chamber, a method of filling the chamber comprising the steps of:

establishing communication between the needle and the second compartment by puncturing the barrier with the needle;
filling the second compartment with the second liquid through the needle by withdrawing the plunger proximally in the chamber from a location adjacent the barrier and drawing the second liquid into the second compartment;
expelling air from the second compartment through an elongated slot of the needle located in a proximal recess of the barrier by pressing the plunger into the chamber;
removing the needle from the syringe;
and
filling the first compartment with the first liquid by withdrawing the plunger proximally in the chamber and drawing the first liquid through the passageway and into the first compartment.

3 more elements

Dependencies are inferred from the claim text.