Endoscopic transduodenal biliary drainage system
First Claim
1. An endoscopic transduodenal biliary drainage system comprising a puncture needle (2) having a sharp pointed portion (5) at a distal end thereof, an expandable metallic stent (1) provided on a distal end portion of the needle (2), and a delivery sheath (3) having the stent (1) enclosed therein in a contracted state, the biliary drainage system being adapted for use in a surgical method comprising endoscopically puncturing the gallbladder (7) with the sharp pointed portion (5) of the needle (2) from the duodenum (6) while passing a high-frequency current through the needle (2), thereafter pulling the delivery sheath (3) to expand the stent (1) and cause both the duodenum (6) and the gallbladder (7) to retain the stent (1), and removing the needle (2).
1 Assignment
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Accused Products
Abstract
The invention relate to a new procedure for physiologically draining bile into the duodenum, and provides a biliary drainage system for use in this procedure. The biliary drainage system comprises a puncture needle 2 having a sharp pointed portion 5 at a distal end thereof, an expandable metallic stent 1 provided on a distal end portion of the needle 2, and a delivery sheath 3 having the stent 1 enclosed therein in a contracted state. The system is useful for a surgical method comprising endoscopically puncturing the gallbladder 7 with the sharp pointed portion 5 of the needle 2 from the duodenum 6 while passing a high-frequency current through the needle 2, thereafter pulling the delivery sheath 3 to expand the stent 1 and cause both the duodenum 6 and the gallbladder 7 to retain the stent 1, and removing the needle 2.
74 Citations
4 Claims
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1. An endoscopic transduodenal biliary drainage system comprising a puncture needle (2) having a sharp pointed portion (5) at a distal end thereof, an expandable metallic stent (1) provided on a distal end portion of the needle (2), and a delivery sheath (3) having the stent (1) enclosed therein in a contracted state, the biliary drainage system being adapted for use in a surgical method comprising endoscopically puncturing the gallbladder (7) with the sharp pointed portion (5) of the needle (2) from the duodenum (6) while passing a high-frequency current through the needle (2), thereafter pulling the delivery sheath (3) to expand the stent (1) and cause both the duodenum (6) and the gallbladder (7) to retain the stent (1), and removing the needle (2).
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2. An endoscopic transduodenal biliary drainage system comprising a puncture needle (2) having a sharp pointed portion (5) at a distal end thereof, a guiding catheter (10) having the needle (2) inserted therethrough, a tube stent (11) provided around a distal end portion of the needle (2), and a delivery sheath (3) provided around the catheter (10) on the proximal side of the stent (11), the biliary drainage system being adapted for use in a surgical method comprising endoscopically puncturing the gallbladder (7) with the sharp pointed portion (5) of the needle (2) from the duodenum (6) while passing a high-frequency current through the needle (2), and thereafter pulling the needle (2) and the catheter (10) to cause both the duodenum (6) and the gallbladder (7) to retain the stent (11).
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3. A surgical method of endoscopic transduodenal biliary drainage with use of a biliary drainage system comprising a puncture needle (2) having a sharp pointed portion (5) at a distal end thereof, an expandable metallic stent (1) provided on a distal end portion of the needle (2), and a delivery sheath (3) having the stent (1) enclosed therein in a contracted state, the surgical method comprising endoscopically puncturing the gallbladder (7) with the sharp pointed portion (5) of the needle (2) from the duodenum (6) while passing a high-frequency current through the needle (2), thereafter pulling the delivery sheath (3) to expand the stent (1) and cause both the duodenum (6) and the gallbladder (7) to retain the stent (1), and removing the needle (2).
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4. A surgical method of endoscopic transduodenal biliary drainage with use of a biliary drainage system comprising a puncture needle (2) having a sharp pointed portion (5) at a distal end thereof, a guiding catheter (10) having the needle (2) inserted therethrough, a tube stent (11) provided around a distal end portion of the needle (2), and a delivery sheath (3) provided around the catheter (10) on the proximal side of the stent (11), the surgical method comprising endoscopically puncturing the gallbladder (7) with the sharp pointed portion (5) of the needle (2) from the duodenum (6) while passing a high-frequency current through the needle (2), and thereafter pulling the needle (2) and the catheter (10) to cause both the duodenum (6) and the gallbladder (7) to retain the stent (11).
Specification