Surgery – Instruments – Electrical application
Reexamination Certificate
1998-04-24
2001-04-10
Cohen, Lee (Department: 3739)
Surgery
Instruments
Electrical application
C606S045000, C606S049000, C606S180000
Reexamination Certificate
active
06214001
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to improved surgical and cauterizing apparatus and methods for their use.
2. Description of Related Art
Arthroscopic surgery is becoming increasingly popular, because it generally does less damage than open procedures, produces less scarring in and around joints, and results in faster healing and return of the patient to full productivity.
Nevertheless, arthroscopic surgery has its limitations. The surgeon must operate through a narrow tube formed in the body on which surgery is being carried out, which is awkward. Only one probe can be used at a time for many operations. Often the viewing camera is positioned at an angle different from the surgeon's normal gaze. This contrasts with “open surgery” where the surgeon has relative ease of viewing the surgical site and can freely move both hands.
Occasionally, during the performance of an arthroscopic or similar minimally invasive procedure, a surgeon will penetrate a vessel within the surgical site. At this point, the surgeon may desire to cauterize the vessel.
One way of cauterizing the vessel is the use of radio frequency (RF) energy, as described in U.S. Pat. No. 5,100,402 to Fan. Such RF methods offer a quick and relatively easy way of cauterizing penetrated vessels. However, use of current RF cauterizing devices usually requires the surgeon to withdraw the surgical tool being used at the time, and insert a tool for cauterizing the penetrated vessel. This switching of the tools is usually required because of the space limitations involved in arthroscopic surgery.
This switching of tools during surgery can be time consuming, awkward, and potentially dangerous to the patient. Additionally, there is the danger of not being able to locate the penetrated vessel. Therefore, there is the need for an improved surgical apparatus and cutting and cauterizing device and methods for using the apparatus and device to avoid the above-mentioned problems.
SUMMARY OF THE INVENTION
In one aspect, the invention relates to a surgical apparatus, comprising a surgical instrument including a housing and a cannula, and the cannula attached at a proximal end to the housing and defining at a distal end thereof an opening and the housing containing a drive interface; and a surgical tool including a shaft and a tip, and the tip located in the opening, and the shaft contained within the cannula and the shaft mechanically and electrically coupled at a distal end to the tip, and at a proximal end, to the drive interface and an electrical interface, and the drive interface producing a surgical motion of the tip, and the electrical interface producing a cauterizing action of the tip.
In another aspect, the invention relates to a cutting and cauterizing device for connection to a surgical instrument, and the surgical instrument including a drive interface and a first interconnector, and the cutting and cauterizing device comprising a cannula defining at a distal end thereof an opening; a second interconnector, suitable for switchably coupling to a power supply, and the second interconnector located at the proximal end of the cannula and shaped to couple to the first interconnector; and a surgical tool including a shaft and a tip, and the tip located in the opening, and the shaft contained within the canula, and the shaft coupled at a distal end to the tip and at a proximal end mechanically coupled to the drive interface to permit a surgical motion of the tip, and electrically coupled to the second interconnector to permit a cauterizing action of the tip.
In yet another aspect, the invention relates to methods of performing surgical procedures, using the surgical apparatus or the cutting and cauterizing device in the course of performing the surgical procedure.
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Casscells Christopher D.
Reyes Ramiro L.
Sharkey Hugh R.
Cohen Lee
David J. Weitz, Wilson Sonsini. Goodrich & Rosati
Kearney R.
Oratec Interventions, Inc.
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