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United States Patent
Lu et al.
(io) Patent No.: (45) Date of Patent:
US 7,927,327 B2 Apr. 19, 2011
(54) (75) (73) (*)
(21) (22) (65)
MEDICAL INSTRUMENT HAVING AN
ARTICULATABLE END EFFECTOR
Inventors: Ifung Lu, Skokie, IL (US); Rudolph H.
Nobis, Mason, OH (US)
Assignee: Ethicon Endo-Surgery, Inc., Cincinnati, OH (US)
Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 1128 days.
Filed: Apr. 25, 2006
Prior Publication Data
US 2007/0250111 Al Oct. 25, 2007
U.S. CI 606/1; 606/205
Field of Classification Search 606/1
See application file for complete search history.
U.S. PATENT DOCUMENTS
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4,884,557 A 12/1989 Takehana et al.
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4,893,613 A 1/1990 Hake
4,930,494 A 6/1990 Takehana et al.
4,963,147 A 10/1990 Agee et al.
5,002,041 A 3/1991 Chikama
A medical instrument includes a flexible tube, a distal member, a flexible end-effector activation wire, a proximal member, and a flexible first cable. The distal member is connected to the distal tube portion. The activation wire is positioned within the tube. The proximal member is attached to the tube. The first cable is positioned outside the tube, is substantially transversely constrained by the proximal member, and has a first distal cable portion attached to the distal member. Lengthwise translation of the first cable articulates the distal member with respect to the proximal member. Another instrument includes a drive screw which articulates an end effector (e.g., a grasper) pivotally connected to a tube. An additional instrument includes a drive screw which articulates a distal medical instrument member pivotally connected to a tube. A medical end effector (e.g., a snare) is positionable in a lumen of the distal medical instrument member.
18 Claims, 10 Drawing Sheets
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