US3910279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrosurgical instrument
Assignee: Olympus Corp
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Filing: 1974-06-19
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Granted: 1975-10-07
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Expires: 1994-06-19
Abstract
Abstract In the forward end portion of the flexible insulating tube of an electrosurgical instrument there is formed an opening or fenestra at the side surface thereof, and when an electrode wire is forced into the insulating tube, the working section thereof is outwardly looped through said opening, so that said looped working section is brought into contact with the tissue of the body cavity to resect the same. This instrument is introduced into a predetermined position of the body cavity using an endoscope while an operator is observing the endoscope.
Inventors
- 👤 Takeshi Okada
- 👤 Kazuhiko Mitsui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:57
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B17/00; A61B17/32; A61B17/3205; A61B17/32056; A61B18/1492; A61B2018/1405; A61B2018/1407
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
207 words
An electrosurgical instrument for resecting the tissue of a body cavity comprising: a flexible insulating tube including a forward end portion substantially straight along the axial line of the tube and having a fixed tip end and a pair of axially aligned holes formed in a side of the forward end portion of the tube; a flexible electrode wire affixed to said tip end and capable of being manually forced into and withdrawn from the tube along its axis, said electrode wire including a body section having a base end disposed within said tube lengthwise thereof, an end section fixed within the tip end of the forward end portion of the tube and a working section outside of the tube having both of its ends respectively connected to the body section and the enD section and projectively looped in an axial plane through said pair of holes and radially adjustable in response to the force exerted on said electrode wire; and means for connecting said base end of the body section to a source of electric current including means to radially adjust the working section whereby said looped working section may be brought into contact with the tissue of the body cavity thereby to resect said tissue.
Claim 2
Dependent Claim
207 words
An electrosurgical instrument for resecting the tissue of a body cavity comprising: a flexible insulating tube including a forward end portion substantially straight along the axial line of the tube and having a fixed tip end and a pair of axially aligned holes formed in a side of the forward end portion of the tube; a flexible electrode wire affixed to said tip end and capable of being manually forced into and withdrawn from the tube along its axis, said electrode wire including a body section having a base end disposed within said tube lengthwise thereof, an end section fixed within the tip end of the forward end portion of the tube and a working section outside of the tube having both of its ends respectively connected to the body section and the enD section and projectively looped in an axial plane through said pair of holes and radially adjustable in response to the force exerted on said electrode wire; and means for connecting said base end of the body section to a source of electric current including means to radially adjust the working section whereby said looped working section may be brought into contact with the tissue of the body cavity thereby to resect said tissue.
Claim 3
Dependent Claim
16 words
An electrosurgical instrument according to claim 1, wherein said flexible electrode wire is a single wire.
Claim 4
Dependent Claim
154 words
An electrosurgical instrument according to claim 1, which further comprises a second pair of axially aligned holes formed in a side of said forward end portion of the tube, a second flexible electrode wire capable of being manually forced into and withdrawn from the tube along its axis and having a second body section disposed within the tube lengthwise thereof and secured to the body section of the first aforesaid electrode wire, and a second end section fixed within the tip end of the forward end portion together with the end section of the first aforesaid electrode wire and a second working section outside of the tube disposed between said second body section and said second end section and projectively looped in another axial plane through said second pair of holes and radially adjustable in response to the force exerted on both electrode wires, said second body section being connected to said connecting means.
Claim 5
Dependent Claim
107 words
An electrosurgical instrument according to claim 1, which further comprises a grip member secured to a base end of the insulating tube and having an insertion hole for allowing said electrode wire to be inserted therethrough in the axial direction of the tube, a grip surface at its outer circumference, and a rigid guide pipe covering the electrode wire at the base end of the body section and slidably extending through the insertion hole of the grip member, thereby to prevent the electrode wire from buckling during insertion and withdrawal of said wire, said connecting means including a manually operable knob member secured to said guide pipe.
Claim 6
Dependent Claim
117 words
An electrosurgical instrument according to claim 1, which further comprises a second electrode wire having a second working section outside of the tube and having one end thereof connected to the body section of said first aforesaid electrode wire and the other end fixed within the tip end of said forward end portion; a second pair of axially aligned holes provided for different portions of the side of the forward end portion of the tube, said second working section being connected to the body section and tip end and being projectively looped in another plane in relation to the axial line of the tube through said second pair of holes transversely with respect to said axial line.
Claim 7
Dependent Claim
31 words
An electrosurgical instrument according to claim 5, wherein the body section of the electrode wire is constructed of a single wire larger in thickness than that of each respective working section.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |