Ring Knife
The ring knife has been developed to provide access to the target lesion using RF current in connection with an endosonographic intervention. The ring knife set consists of a ring knife with pushed and connected pusher and a preloaded 3-flap straight endoprosthesis. After creating access to the target lesion, the endoprosthesis can be placed for drainage without changing instruments.
Example of Use
Ring knife for EUS-guided internal bile duct and pancreatic duct drainage
Figure 4
Jaundice caused by local recurrence of gastric cancer:
1. Transjejunal EUS-puncture of the biliary tract
2. The ring knife is pushed into the common biliary duct
Figure 5
X-ray control of the ring knife feed:
1. Good visibility of the knife
2. Widening of the tumor stenosis by ring knife
Figure 6
Transjejunal-transhepatic insertion of a covered metal stent. Bridging of the tumor stenosis of the bile duct and restorati-on of the orthograde drainage.
Example of Use
Ring knife for the therapy of pseudocysts
Figure 1
After EUS-FNA of a pseudocyst, the ring knife is positioned above the lying guide wire and a cystostomy is performed.
Figure 2
Figure 3
After the cystostomy a drainage is introduced via the ring knife support system during the same session.
