Grasping forceps for performing cholangiography

Abstract: A device for injecting dye into the ampulla and bile duct for cholangiography in conjunction with surgical removal of a gall bladder comprises grasping forceps 10 with a side channel 14. A catheter 20 is passed through the side channel and carries a needle 22 at its leading end. The clamp 16 of the forceps is clamped around the ampulla 32 to prevent stones in the gall bladder from passing into the bile duct. The dye is administered through the catheter 20 and the needle 22 into the ampulla.

Description: BACKGROUND OF THE INVENTION The present invention relates generally to devices and techniques used in gall bladder surgery and more particularly to a device for performing a cholangiography at the time of gall bladder surgery, to assure that no stones from the gall bladder are retained in the bile ducts and related structures. It will be appreciated by those skilled in the art that an important part of gall bladder surgery is cholangiography, which involves the injection of dye into the bile ducts at the time of surgery to assure that no stones from the gall bladder have passed into the bile ducts. After injection of a dye, an x-ray is taken. The developed x-ray outlines the bile ducts, thereby showing any stone or other abnormalities that need to be removed or corrected in the course of the surgical procedure. Historically, when open surgery is performed, cholangiography is accomplished by inserting a plastic tube or catheter into the cystic duct which connects the gall bladder to the bile duct. This same method is currently being used in conjunction with laparoscopic cholecystectomy. Unfortunately, threading a catheter through a long hollow tube and into a cystic duct which is 3-4 mm in diameter is very difficult and technically frustrating, because of the size, bad angle, and catheter flexibility. The use of a rigid catheter will not work because it will not pass through the curved course. External support of the flexible catheter with a hollow metal tube has also failed to work satisfactorily. Laparoscopic cholecystectomy was offered as an improvement to open surgery. Using this surgical technique, the gall bladder is removed by use of four 0.5 to 1.0 cm sized round metal tubes into the abdomen instead of an open surgical incision. A tube inserted through the navel carries a visualizing lens or laparoscope and camera that is connected to a video monitor, providing a picture of an internal view of the abdomen. Using long, narrow instruments inserted through three other small holes along the right upper part of the abdomen, the surgeon dissects and identifies the cystic duct which connects the gall bladder to the common bile duct. The surgeon also dissects and identifies the cystic artery. The cystic duct and artery are clipped and divided. The gall bladder is then removed, along with the contained stones. The surgical procedure appears to be quite successful, and patients can leave the hospital in a day instead of the four or five days required for recovery from open surgery. Patients can also return to work in as little as a week, instead of the four to six weeks of recovery required after open surgery. A prior art method of performing a cholangiography is to clamp the gall bladder. A metal clip is then placed around the ampulla to prevent stones from flowing through the ampulla to the bile duct and to reduce leakage of bile from the gall bladder. Another metal tube is then placed into the abdomen. This metal tube directs a catheter into the cystic duct, between the ampulla and the common bile duct, after a small opening is cut into the cystic duct. Unfortunately, this method requires clamping, encircling, application of a different tube carrying the catheter, and placement of the dye into the cystic duct. US Patent Specification No 4325375 describes a device for introducing or removing a lens into the eye. The device comprises a grasping forceps with jaws manipulable by use of the fingers for inserting and removing a lens. French specification No 2469912 describes a surgical or endoscopic grasper. The device comprises a grasping forceps with a handle, gripping jaws and a channel connecting the gripping jaws to the handle. A side channel is secured to the channel of the grasping forceps. According to the present invention there is provided a device for performing a cholangiography according to Claim 1. In the preferred embodiment, the grasping forceps have a channel which directs wire between the handle and clamp or forceps. A side channel directs a catheter with a needle in parallel with the grasping forceps channel. The grasping forceps with side channel are placed into the abdomen of the patient through a laparascopic cannula. The grasping forceps are closed proximate to and around the ampulla of the gall bladder to prevent stones from the gall bladder from travelling into the common bile duct and to prevent leakage of bile. The clamped forceps prevent the flow of bile into the gall bladder. The side channel then directs the catheter to penetrate the ampulla on the side of the ampulla away from the gall bladder. Dye is then injected into the ampulla. The clamped forceps prevent the dye from reaching the gall bladder. An embodiment of the invention will be described with reference to the accompany drawings of which:- Fig. 1 is a side view of the grasping forceps with side channel according to the present invention; Fig. 2 is a cutaway view of the grasping forceps with side channel as it clamps the ampulla and penetrates the ampulla away from the gall bladder; and Fig. 3 is a cutaway view of the grasping forceps with side channel as it clamps the ampulla and applies dye into the ampulla through the extended catheter away from the gall bladder. Referring now to Fig. 1, there is shown generally at 10 the grasping forceps with side channel of the present invention. Device 10 has grasping forceps channel 12 which directs wire 24 from handle 18 to clamp 16 . As handle 18 is clamped together, clamp 16 closes. As handle 18 moves apart, clamp 16 opens. Device 10 is provided with side channel 14 which runs substantially parallel to channel 12 . Through side channel 14 there is placed catheter 20 . On end of side channel 14 proximate to clamp 16 , needle 22 can be passed. End of side channel 14 proximate to handle 18 is angled away from handle 18 to allow the user to feed catheter 20 without interference with handle 18 . Referring now to Fig. 2, there is shown generally at 10 the device of the present invention. As one can see, clamp 16 closes around ampulla 32 to prevent stones 36 in gall bladder 34 from passing into ampulla 32 curing a cholecystectomy. This clamp 16 prevents stones 36 in gall bladder 34 from also passing into common bile duct 38 . After ampulla 32 has been closed by clamp 16 , needle 22 is directed through side channel 14 . Needle 22 then administers dye into ampulla 32 away from gall bladder 34 . Needle 22 punctures ampulla 32 to apply dye. Back flow of dye into gall bladder 34 is prevented by clamp 16 . Therefore, dye can only travel into ampulla 32 and on into bile duct 38 . In the preferred embodiment, clamp 16 is substantially 1.9 cm to 2.5 cm (3/4 inch to 1 inch), to enable clamp 16 to clamp off entire ampulla 32 . In the preferred embodiment, the length of channel 14 is substantially 35 cm. However, any length may be used, as long as the surgeon is able to reach ampulla 32 . Needle 22 is, in the preferred embodiment, a 23 gauge needle and is substantially 1.3 cm (1/2 inch) long. In the preferred embodiment, device 10 enters stomach from the left side of the abdomen, angling to the right. Clamp 16 can have flat or serrated teeth. In the preferred embodiment, device 10 is directed through a conventional surgical cannula. Channel 12 is substantially 3 mm in diameter, and side channel 14 is sized so that device 10 can pass through a standard 5 mm cannula. In the preferred embodiment, end of side channel 14 proximate to handle 18 is angled away from handle 18 so as to allow the surgeon to feed catheter 20 through side channel 14 without interfering with handle 18 . Further, to achieve a preferred angle of entry of needle 22 into the ampulla, the distal or lower end of channel 14 should be cut at an angle such that an oval opening is created which will direct the needle 22 at approximately 15 to 20 degrees away from channel 12 . Prior to placement of device 10 into the cannula, carbon dioxide is placed into the abdomen through the cannula to enlarge the natural channels of the abdomen. After device 10 is placed in cannula, a certain amount of pressure of CO 2 is applied to the cannula to ensure that the proper amount of carbon dioxide remains in the abdomen. To ease application of the dye through catheter 20 , end of side channel 14 proximate to handle 18 is angled away from channel 12 . Stopper 40 is placed in opening 42 of end of side channel 14 proximate to handle 18 to ensure that liquid and gas do escape through channel 14. Stopper 40 could conceivably be placed in other end of channel 14. However, this may interfere with catheter 20 . Thus, although there have been particular embodiments of the present invention of a new and useful device of cholangiography, it is not intended that such references be construed as limitations upon the scope of this invention, except as set forth in the following claims. Further, although there have been described certain dimensions used in the preferred embodiment, it is not intended that such dimensions be construed as limitations upon the scope of this invention, except as set forth in the following claims.

Claims: A device for performing a cholangiography comprising a grasping forceps with a handle (18), gripping means (16) and a channel (12) connecting the gripping means (16) to the handle (18), and a side channel (14) secured to the channel (12) characterised in that the gripping means comprise a clamp (16), in that the clamp (16) is sufficiently long to enable it to clamp off entirely an ampulla of a gall bladder, and in that the device includes means (22) for applying a dye into the ampulla clamped by the clamp (16), the side channel (14) serving for directing the dye applying means (22) into the said ampulla. A device according to Claim 1, in which the clamp (16) is substantially 1.9 cm to 2.5 cm (¾ inch to 1 inch) long. A device according to Claim 1 or 2, in which the clamp (16) is elongate. A device according to Claim 1, 2 or 3, in which the means for applying dye into an ampulla comprises a catheter (20) and an ampulla penetration means (22). A device according to Claim 4, in which the ampulla penetration means comprises a needle (22) attached to the catheter (20). A device according to Claim 5, in which the catheter is slidable in the side channel (14), the side channel (14) being positioned relative to the clamp so as to direct the needle to penetrate the ampulla away from the gall bladder when a gall bladder is clamped off in the clamp (16). A device according to any of the preceding claims, in which the side channel (14) is attached to and substantially parallel to the channel (12). A device according to any of the preceding claims, in which the end of the side channel (14) is cut at an angle such that an oval opening is created which will direct the dye applying means (22) at an angle of approximately 15 to 20 degrees away from the channel (14).

Inventors: KUMAR SARBJEET, KUMAR, SARBJEET
Applicants: KUMAR SARBJEET, KUMAR, SARBJEET
Application year: 1992
Main classification: A61B17
IPC codes: A61B19, A61B17, A61B6, A61M3