US Patent No: 5,047,026

Number of patents in Portfolio can not be more than 2000

Electrosurgical implement for tunneling through tissue

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Abstract

An electrosurgical implement for tunneling through tissue for effecting drainage of an organ or to restore patency to a blood vessel is described. The implement comprises a stainless steel, helically wound, wire body similar to a conventional guidewire of the type used in angiography, angioplasty or in implanting cardiac pacing leads. The exterior of the guidewire is coated with an insulating material, save for one or two convolutions at its distal end. A core wire having a Teflon.RTM. shrink tube surrounding it over substantially its entire length is disposed within the lumen of the helical guidewire and only a short segment of the distal end of the core wire is allowed to extend out from the distal end of the guidewire. This short segment is stripped free of insulation. The implement may be routed through an endoscope into the stomach or colon and when an RF voltage of an appropriate amplitude is connected across terminals electrically joined to the proximal ends of both of the guidewire and the core wire, an arc discharge is created when the distal end of the implement is brought into contact with tissue, thereby allowing the device to readily pierce this tissue. The same implement may also be used for restoring patency to a blocked blood vessel.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
GYRUS MEDICAL, INC.MAPLE GROVE, MN36
ST. PAUL FIRE AND MARINE INSURANCE COMPANYMINNEAPOLIS, MN39

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Rydell, Mark A Golden Valley, MN 95 11561

Cited Art

Patent Info (Count) # Cites Year
 
ST. PAUL FIRE AND MARINE INSURANCE COMPANY (3)
4,802,476 Electro-surgical instrument 90 1987
4,976,711 Ablation catheter with selectively deployable electrodes 521 1989
4,905,691 Polypectome snare with bipolar electrodes 83 1989
 
CORDIS CORPORATION (1)
4,920,980 Catheter with controllable tip 233 1987
 
EVERST MEDICAL CORPORATION (1)
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MARVELL WORLD TRADE LTD. (1)
7,869,248 Bit line decoder architecture for NOR-type memory array 1 2008
 
OLYMPUS OPTICAL CO., LTD. (1)
4,311,143 Apparatus for resecting tissue inside the body cavity utilizing high-frequency currents 114 1979

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
ARTHROCARE CORPORATION (89)
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6,632,220 Systems for electrosurgical tissue treatment in conductive fluid 100 1999
7,572,251 Systems and methods for electrosurgical tissue treatment 16 1999
6,632,193 Systems and methods for electrosurgical tissue treatment 184 2000
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7,094,215 Systems and methods for electrosurgical tissue contraction 98 2003
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6,960,204 Electrosurgical method using laterally arranged active electrode 83 2003
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8,114,071 Hard tissue ablation system 0 2007
7,988,689 Electrosurgical apparatus and methods for treatment and removal of tissue 2 2007
7,717,912 Bipolar electrosurgical clamp for removing and modifying tissue 0 2007
8,192,424 Electrosurgical system with suction control apparatus, system and method 8 2008
7,824,405 Electrosurgical apparatus and methods for laparoscopy 4 2008
7,794,456 Systems and methods for electrosurgical intervertebral disc replacement 2 2008
7,819,863 System and method for electrosurgical cutting and ablation 4 2008
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Other [Check patent profile for assignment information] (1)
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