Surgery – Means for introducing or removing material from body for... – With means for cutting – scarifying – or vibrating tissue
Reexamination Certificate
2000-03-07
2001-08-28
Yasko, Jr., J. (Department: 3763)
Surgery
Means for introducing or removing material from body for...
With means for cutting, scarifying, or vibrating tissue
Reexamination Certificate
active
06280407
ABSTRACT:
BACKGROUND
1. Technical Field
The present disclosure relates to an ultrasonic dissection and coagulation system for surgical use. More specifically, the present disclosure relates to an ultrasonic instrument including an angled blade and a clamp member particularly suited for performing dissection and coagulation of tissue.
2. Background of Related Art
Ultrasonic instruments for surgical use and the benefits associated therewith are well known. For example, the use of an ultrasonic generator in conjunction with a surgical scalpel facilitates faster and easier cutting of organic tissue and accelerates blood vessel clotting in the area of the cut, i.e., accelerate coagulation. Improved cutting results from increased body tissue to scalpel contact caused by the high frequency of vibration of th e scalpel blade with respect to body tissue. Improved coagulation results from heat generated by contact between the scalpel blade and the body tissue as the scalpel blade is vibrated at a high frequency. Thus, in order to reap the advantages associated with ultrasonic energy, good blade to tissue contact is important.
U.S. Pat. No. 3,862,630 (“Balamuth”) discloses an ultrasonic system including an ultrasonic motor, a tool member having a working surface oriented normal to the direction of mechanical vibration generated by the ultrasonic motor, and a clamp member extending parallel to the tool member for compressing tissue against the tool member. U.S. Pat. No,. 5,322,055 (“Davison”) discloses an ultrasonic surgical instrument adapted for endoscopic use having a blade and a clamp movable in relation to the blade to capture tissue therebetween. The blade and the clamp define a clamping region having a plane which is parallel to the longitudinal axis of the surgical instrument. During an endoscopic procedure, movement of the instrument is limited to movement along an axis parallel to the plane of the clamping region. Thus, no additional blade force is imposed on the body tissue as a result of movement of the instrument.
Accordingly, a need exists for an improved ultrasonic surgical instrument which is easy to use and provides fast and easy cutting and improved coagulation.
SUMMARY
In accordance with the present disclosure, an ultrasonic tissue dissector is provided for dissection and coagulation of tissue. The surgical instrument includes a housing and a vibration coupler supported within the housing operably connected to an ultrasonic generator. An angled blade member is connected to the distal end of the vibration coupler to conduct high frequency vibration to the blade member. The blade member has a cutting surface that forms an obtuse angle with respect to an axis transverse to the longitudinal axis of the vibration coupler. The blade member may also have a width that tapers in the distal direction. A clamp member may be positioned adjacent to the blade member and is movable from an open position to a clamped position to capture tissue therebetween. The clamp member and angled blade member combine to enhance contact between the tissue and the blade member during operation of the instrument to improve the performance of the instrument.
In an alternate embodiment, the surgical instrument is operatively associated with a control module and a remote actuator and has a housing and an elongated body portion extending from the housing. An ultrasonic transducer supported within the housing is operatively connected to a cutting blade by a vibration coupler. The vibration coupler conducts high frequency vibration from the ultrasonic transducer to the cutting blade. The cutting blade has a cutting surface which is angled with respect to the longitudinal axis of the elongated body portion and, thus, with respect to the axis of vibration. A clamp member having a tissue contact surface is positioned adjacent to the blade member and is movable via an actuator tube from an open position in which the tissue contact surface is spaced from the cutting surface to a clamped position in which the tissue contact surface is in close juxtaposed alignment with the cutting surface to clamp tissue therebetween. Because the cutting blade is angled with respect to the longitudinal axis of the elongated body portion, the contact pressure applied by the blade surface is increased as the force applied to the instrument is increased.
REFERENCES:
patent: 2002594 (1935-05-01), Wappler et al.
patent: 2011169 (1935-08-01), Wappler
patent: 2714890 (1955-08-01), Vang
patent: 2874470 (1959-02-01), Richards
patent: 3086288 (1963-04-01), Balamuth et al.
patent: 3427480 (1969-02-01), Robinson
patent: 3526219 (1970-09-01), Balamuth
patent: 3636943 (1972-01-01), Balamuth
patent: 3752161 (1973-08-01), Bent
patent: 3792701 (1974-02-01), Kloz et al.
patent: 3862630 (1975-01-01), Balamuth
patent: 3899829 (1975-08-01), Storm et al.
patent: 3930173 (1975-12-01), Banko
patent: 4428748 (1984-01-01), Peyman et al.
patent: 4672965 (1987-06-01), Baum
patent: 4682597 (1987-07-01), Myers
patent: 5026387 (1991-06-01), Thomas
patent: 5047043 (1991-09-01), Kubota et al.
patent: 5057098 (1991-10-01), Zelman
patent: 5059210 (1991-10-01), Clark et al.
patent: 5167725 (1992-12-01), Clark et al.
patent: 5180363 (1993-01-01), Idemoto et al.
patent: 5188102 (1993-02-01), Idemoto et al.
patent: 5190541 (1993-03-01), Abele et al.
patent: 5201759 (1993-04-01), Ferzli
patent: 5217460 (1993-06-01), Knoepfler
patent: 5222937 (1993-06-01), Kagawa
patent: 5263957 (1993-11-01), Davison
patent: 5267998 (1993-12-01), Hagen
patent: 5322055 (1994-06-01), Davison et al.
patent: 5334183 (1994-08-01), Wuchinich
patent: 5352222 (1994-10-01), Rydell
patent: 5389104 (1995-02-01), Hahnen et al.
patent: 5441512 (1995-08-01), Muller
patent: 5562693 (1996-10-01), Devlin et al.
patent: 5776155 (1998-07-01), Beaupre et al.
patent: 5800448 (1998-09-01), Banko
patent: 5810859 (1998-09-01), DiMatteo et al.
patent: 6063050 (2000-05-01), Manna et al.
patent: 2 032 501 (1972-01-01), None
patent: 0 456 470 (1981-11-01), None
patent: 0 394 583 (1990-10-01), None
patent: 1-232949 (1989-09-01), None
patent: 1 232 948 (1989-09-01), None
patent: 63-061609 (1993-05-01), None
patent: 1155256 (1985-05-01), None
patent: WO 86/02257 (1986-04-01), None
patent: WO 94/20025 (1994-09-01), None
Aranyi Ernie
Isola Scott
Manna Ronald
Mastri Dominick L.
Stone Corbett W.
United States Surgical Corporation
Yasko, Jr. J.
LandOfFree
Ultrasonic dissection and coagulation system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ultrasonic dissection and coagulation system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic dissection and coagulation system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2456235