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公开(公告)号：CA2200535A1
公开(公告)日：1997-09-21
申请号：CA2200535
申请日：1997-03-20
Applicant: VALLEYLAB INC
Inventor： STODDARD ROBERT B , KETCHAM CLIFF R , RESCHKE ARLAN J
Abstract: A circuit (10) concurrently activates a gas flow control valve (15) and electrosurgical generator (11) from an electrosurgical pencil (13). An automaticswitch (16) receives current flow upon the operation of the energy request button (12) by the surgeon. The switch connects to the gas surgical unit (26) flow control valve (15) operating it to control inert gas to the pencil. An electrode (32) and nozzle combination (30) transports ionizable gas to a tip (31) on the pencil for gas enhanced electrosurgery on a patient. An electrode (32) has proximal and distal ends (34) with a length (35) between and along an axis. A shroud (36) surrounds the electrode (32) along its length (35) leaving the proximal and distal ends (34) exposed. A patient part (37) on the shroud (36) points toward the patient. A rear part (38) on the shroud (36) points toward the rear or the pencil. The parts align substantially along the axis so a passage (39) between the parts defines a space(40) within the shroud (36) and about the length (35). A port in the shroud (36) has a lumen (42) protruding therefrom at an angle to the axis. The lumen (42) connects with the passage (39) for fluid communication. An end cap (43) attaches to the proximal end (33) for surrounding the electrode (32) and for forming a gas tight seal between the proximal end (33) and the rear part (38) of the shroud (36). A complimentary portion (44) on the rear part (38) and an anti rotation lock (45) on the end cap (43) engage to prevent relative rotary motion. An anti twist posterior (46) on the end cap (43) interengages with the pencil to prevent relative rotation. The anti twist posterior (46) and the pencil each have hexagonal interengaging features thereon. The shroud (36) and end cap (43) are of polymers that can be injection and overmolded, respectively to the electrode (32). A method makes a gas tight seal between a shroud (36) and an electrode (32) by injection molding then fixturing the electrode (32) without contact with the shroud (36). Overmolding an end cap (43) to the shroud (36) attaches the electrode (32) and to form the seal.
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公开(公告)号：DE29580791U1
公开(公告)日：1997-09-11
申请号：DE29580791
申请日：1995-11-08
Applicant: VALLEYLAB INC
Abstract: A partially coated electrosurgical electrode has a portion of a medical grade metallic material as a substrate for energy application. Conductive of sites of metallic material or alloys thereof pass energy through peaks that define valleys nearby. A partial coating in the valleys has a low surface free energy. A treated surface across the peaks and generally over the filled valleys is relatively smooth for non stick characteristics during application of electrosurgery to tissue and bodily fluids. Openings in the treated surface through the partial coating are at the peaks of conductive sites to expose the metallic material or alloys thereof. The partial coating is a fluorinated polymer. The treated surface is a relatively even level that is not flat. The metallic material substrate is an alloy of stainless steel or nickel chrome. A mechanically deformed surface finish, plasma or vapor deposition on the substrate forms the conductive sites. A method of manufacturing the electrode has steps including preparing it the metallic conductor, making it with the conductive material having peaks above the valleys as conductive sites, applying the partial coating to it and treating the surface across the peaks and generally over the filled valleys of the partially coated electrically conductive electrode. Locating the openings among the valleys is a step. Treating may be mass finishing, such as vibratory or tumbling the partially coated electrodes with or without abrasive material media or polishing, buffing, surface grinding, abrasive belt grinding or sanding with abrasive material. Making the peaks and valleys can be by stamping, coining, burnishing, embossing, threading, tumbling, vibrating, shot peening, wire brushing, grit blasting, thermal spraying, with powder, with wire supplied to melt and be distributed, or with high velocity oxygen fuel and a nickel, cobalt alloy, stainless steel or a nickel chrome alloy. A manufacturing method for the electrode has coating a strip of metal with the low surface energy polymer and forming it in a stamping operation with a raw edge metal edge.
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公开(公告)号：GB9708729D0
公开(公告)日：1997-06-18
申请号：GB9708729
申请日：1997-04-29
Applicant: VALLEYLAB INC
Abstract: An apparatus for transcervical sterilization or transcatheter embolization with a controlled bipolar RF catheter for creating thermal lesions in the fallopian tubes or thrombosing vessels has a catheter elongate along an axis thereof with a patient end. The catheter is circular and sized for transcervical insertion into the fallopian tube or transcatheter vessel insertion, respectively. A connector on an end of the catheter opposite the patient end has the terminations for RF and monitoring and is shaped for the surgeon to manipulate during placement and withdrawal. Two or more bipolar electrodes on the patient end are placed so each electrode is spaced from another with each circumscribing the catheter. A mucosa or thrombus sensor responsive to applied RF energy passing between the two or more bipolar electrodes determines the condition of the transmural formation of a lesion or the thrombus between each of the electrodes. The sensor is a temperature sensor positioned in the space between the electrodes measures the change in mucosal layer temperature or the thrombus during the application of RF energy. An RF generator electrically coupled to the electrodes and the sensor is alternately a phase detector in circuit with the coupling determines reactance of tissue as an indicator of lag or lead of the voltage wave form or current wave form delivered or is an impedance responsive circuit positioned in the RF generator to determine voltage and current delivered so a calculator finds impedance delivered for finding initial electrode contact with the tissue and for measuring the change in mucosal layer. The temperature sensor connects to an RF generator with control circuitry regulating delivery to a temperature range. A method for sterilization has the steps of inserting a catheter, delivering RF and monitoring the effect on the mucosa or thrombus, circumscribing the catheter with two or more bipolar electrodes, each of the electrodes spaced from one another and passing RF energy therebetween.
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公开(公告)号：AU678228B2
公开(公告)日：1997-05-22
申请号：AU6436294
申请日：1994-04-26
Applicant: VALLEYLAB INC
Inventor： KLICEK MICHAEL S , PATERSON WILLIAM G
Abstract: Apparatus and method find leakage due to tissue load or transients and has active and return electrodes for RF energy sensed by transformers for a circuit that finds leakage at more than two thousand times per second or a frequency dependent on the phase shift between voltage and current. Software and feedback manage Vrms to reduce the voltage or increase the crest factor, which is Vrms divided by peak voltage, by pulse width modulation of the RF drive. Voltage and current phase shift changes, angle theta , are compared to a threshold, and when greater, the frequency at which the differences between the active and return current signals are examined is increased. The differences between the active and return currents are examined and when greater than maximum leakage while in coagulation mode, the RF drive pulse width is reduced to maintain voltage wave peaks at a preset value and reduce Vrms thereby reducing leakage to the allowable maximum. Reducing the duty cycle or the pulse width of the output wave increases the crest factor. When the differences between active and return currents are greater than a maximum for leakage while in cut or bipolar mode, the Vrms is reduced to limit leakage to a maximum level. When the phase angle theta is less than a threshold, the frequency with which leakage is examined is reduced.
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Patent Agency Ranking
公开(公告)号：CA2227236A1
公开(公告)日：1997-04-03
申请号：CA2227236
申请日：1996-06-28
Applicant: VALLEYLAB INC
Inventor： MILLBERG BRIAN A , CARR JAN E , LONTINE MICHAEL D , KUK-NAGLE KAREN T , ARTS GENE H
Abstract: A design and method of manufacture are disclosed for an electrosurgical electrode (10) with a silicone coating. The coating resists the build-up of eschar. The silicone material is thick enough in the flat area of the blade to withstand the electrosurgical voltage without breakdown. The electrosurgical current path is primarily through the blade edges (15) and tip. The flat of the blade remains insulated under most conditions. The relatively thick coating also provides high tear strength and added durability. The composition of the electrode (10) coatings may include silicone elastomers (11) in the form of adhesives, dispersions, or liquid rubbers. The coating composition may also contain adhesion promoters, heat stabilizers, plasticizers, release enhancers, cross-linking agents, and colorants. Several methods of manufacture are illustrated by way of examples.
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公开(公告)号：CA2228890A1
公开(公告)日：1997-03-27
申请号：CA2228890
申请日：1996-07-11
Applicant: VALLEYLAB INC
Inventor： RYAN THOMAS PATRICK , KENNEDY JENIFER SERAFIN , LUKIANOW STEPHEN WADE , BUYSSE STEVEN PAUL
Abstract: Electrosurgical energy is used in combination with a surgical tool (12) to seal vessels and vascular tissue of a patient (13). One of the important advances of the present system is that is can effectively seal vessels of a patient (13) without leaving any foreign material in the body of the patient (13). The present system is also capable of sealing vessels as large as ten millimeters in diameter. Another advantage of the present system is that the surgeon can visually inspect the integrity of the seal. The invention works with a combination of pressure and controlled application of electrosurgical energy to achieve the desired result. A surgical tool (12) is used to grasp and apply an appropriate amount of closure force to the tissue of the patient (13). The tool is capable of conducting electrosurgical energy to the tissue concurrently with the application of the closure force. A method for sealing vessels and vascular tissue of a patient (13) includes the steps of applying pressure to the vessels and other tissues of the patient (13); applying a first level of electrosurgical power to the vessels and other tissues sufficient to melt proteins in the tissue; applying a second level of electrosurgical power to the vessels and other tissues sufficient to cause desiccation without charring; reducing the electrosurgical power substantially to zero for a length of time sufficient to allow the vessels and other tissues to cool into a new compressed form; and relieving the pressure on the tissue.
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公开(公告)号：CA2221285A1
公开(公告)日：1996-12-12
申请号：CA2221285
申请日：1996-06-03
Applicant: VALLEYLAB INC
Inventor： BEK ROBIN B
Abstract: An electrosurgical generator (10) is disclosed that includes an exit spark control system. Exit sparking occurs when energy arcs to the patient (13) as the active electrode (12) is withdrawn from the patient (13). A basis for controlling the exit spark is to automatically change the frequency at which the final amplifier is driven whenever the conditions for an exit spark are detected. The change in frequency acts to lower the gain and efficiency in the final amplifier and dissipate energy as heat. The exit spark control system includes a frequency adjustable waveform generator (14) and a logic capability for determining the conditions when exit sparking is likely to occur. Sensors and an algorithm in a microcontroller (16) are preferably required to detect the conditions preceding exit sparking occurrence. It is further preferred that, the algorithm also controls the sequencing of events: first stopping the electrosurgical output to prevent an arc from initiating and then changing the driving frequency appropriately to dissipate excess stored energy. The output waveform may be stopped for only a short time or the surgeon will detect drag while cutting through tissue.
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公开(公告)号：DE9490471U1
公开(公告)日：1996-09-26
申请号：DE9490471
申请日：1994-12-14
Applicant: VALLEYLAB INC
Abstract: Disclosed herein is a telescoping bipolar electrode (1) having an inner electrode (4) with an outer diameter (D4), length and outer side surface, such that up to the entire side surface is covered with an insulation sheath (5), which alternatively is fixed to the inner electrode (4) or is lengthwise adjustable with respect thereto, the inner electrode (4) and insulation sheath (5) together being slidably mounted within the inner space of an outer electrode (2) having an inner diameter greater than that of the inner electrode and its insulation sheath, an outer diameter (D2), thickness, length and an outer side surface area, the outer electrode (2) also having an insulation sheath (3) around its outer diameter (D2), covering up to the entire side surface area of the outer electrode (2), with the insulation sheath (3) around the outer electrode (2) being alternatively fixed to the outer electrode (2) or lengthwise adjustable with respect thereto. The bipolar electrode (1) is capable of being inserted into the human body through a body cavity or through the lumen of a vessel. At least one of the outer and inner electrodes is supplied with radio frequency energy from an external source (10). The bipolar electrode (1) is utilized to cut, desiccate or ablate neoplasms (12) in the body. In an alternative embodiment, the bipolar electrode (1) is configured such that the two component electrodes (2, 4) are arranged externally parallel to one another and are telescopically slidable relative to one another.
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公开(公告)号：AU672284B2
公开(公告)日：1996-09-26
申请号：AU6030194
申请日：1994-01-28
Applicant: VALLEYLAB INC
Inventor： BEATY MICHAEL A , JEFFREY-COKER BANDELE , OLICHNEY MICHAEL D , PAGE JON P , RESCHKE ARLAN J , ROSE EMERY S , STODDARD ROBERT B
Abstract: An ultrasonic and electrosurgical handpiece housing has an axis, a distal end, a proximal end and a passage defined by an inside wall. A piezo stack has elements carried along a plane generally transverse to the axis. A retainer for the elements has distal, intermediate and proximal portions. The distal portion has a fastener; the proximal portion has a threaded shoulder bolt. The stack about the shoulder has an energy input and a reference output positioned axially apart from one another. An insulating sleeve about the bolt is between central openings of the elements and the bolt. A pair of insulators about the bolt has the stack therebetween; one insulator is between the plane and the stack and the other is near the threads. The intermediate portion attaches to the housing at the plane with decoupling and sealing. An irrigation channel conveys fluid. The drive energy input, the feedback signal and the reference outputs are insulated by the sleeve and pair from the bolt. A washer against the insulator and about the threads applies axial but not torsion to the insulator when a clamping nut on the threads holds components on the bolt. The clamping nut is in circuit with electrosurgical energy as the reference return for electrosurgery. A tool fastens to a connector for transmitting axial vibrations in the form of a predefined stroke at a tip thereof.
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