US5480398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endoscopic instrument with disposable auto-regulating heater
Assignee: Hemostatic Surgery Corp
•
Filing: 1994-05-17
•
Granted: 1996-01-02
•
Expires: 2014-05-17
Abstract
Abstract An instrument for use in endoscopic surgery is provided. The instrument has a reusable shaft to which a disposable working tip can be removably attached. The disposable working tip has a working surface for providing hemostasis at an auto-regulated temperature. The working surface may include a tapered edge for providing thermally-enhanced cutting and a non-stick coating for operating the instrument at low auto-regulation temperatures. The instrument is capable of being used for a wide variety of endoscopic surgical procedures.
Inventors
- 👤 Philip E. Eggers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:01
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/08; A61B18/082; A61B17/00; A61B17/32; A61B17/320016; A61B18/12; A61B18/14; A61B18/1482; A61B17/00234; A61B18/10; A61B2018/00053; A61B2018/00107; A61B2018/00636; A61B2018/00642; A61B2018/00773; A61B2018/00791; A61B18/1206; A61B2018/1246; A61B2018/1253; A61B2018/126; A61B2218/00; A61B2218/001; A61B2218/002; A61B2218/007
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
164 words
A disposable working tip for use in endoscopically manipulating and coagulating tissue, the disposable working tip adapted to be removably connected to the end of a reusable elongated shaft, the disposable working tip comprising: a working end having a working surface for contacting tissue and a cross-section extending perpendicularly to the working surface, the working end integrally formed of a heating element, the working surface maintained at an auto-regulated temperature by conducting a current throughout the entire cross-section of the working end, the heating element comprising a material having a skin depth extending substantially throughout the cross-section of said working end responsive to the temperature of the heating element and that decreases as the temperature of the heating element falls below the auto-regulated temperature; first and second terminals electrically coupled to the working end and adapted to be removably coupled to the end of the reusable elongated shaft; and means for coupling the disposable working tip to the end of the reusable elongated shaft.
Claim 2
Dependent Claim
164 words
A disposable working tip for use in endoscopically manipulating and coagulating tissue, the disposable working tip adapted to be removably connected to the end of a reusable elongated shaft, the disposable working tip comprising: a working end having a working surface for contacting tissue and a cross-section extending perpendicularly to the working surface, the working end integrally formed of a heating element, the working surface maintained at an auto-regulated temperature by conducting a current throughout the entire cross-section of the working end, the heating element comprising a material having a skin depth extending substantially throughout the cross-section of said working end responsive to the temperature of the heating element and that decreases as the temperature of the heating element falls below the auto-regulated temperature; first and second terminals electrically coupled to the working end and adapted to be removably coupled to the end of the reusable elongated shaft; and means for coupling the disposable working tip to the end of the reusable elongated shaft.
Claim 3
Dependent Claim
23 words
A disposable working tip as defined in claim 1 wherein the material further comprises a material that exhibits a Curie transition in permeability.
Claim 4
Dependent Claim
17 words
A disposable working tip as defined in claim 2 wherein the material further comprises a ferromagnetic material.
Claim 5
Dependent Claim
33 words
A disposable working tip as defined in claim 1 wherein the working surface further comprises a tapered edge for thermally-enhanced cutting of tissue at a temperature in the range of the auto-regulated temperature.
Claim 6
Dependent Claim
29 words
A disposable working tip as defined in claim 4 wherein the tapered edge defines an apex having an angle in the range of approximately 15 to approximately 50 degrees.
Claim 7
Dependent Claim
34 words
A disposable working tip as defined in claim 1 wherein the working end further comprises a material that can be bent and configured during surgery in order to reach tissue otherwise difficult to access.
Claim 8
Dependent Claim
31 words
A disposable working tip as defined in claim 1 wherein the working surface further comprises a coating of electrically-insulating non-stick material to reduce the accumulation of coagulum on the working surface.
Claim 9
Dependent Claim
48 words
A disposable working tip as defined in claim 1 further comprising: an end cap having a passageway therethrough adapted to permanently hold the working end; and engagement means disposed on said end cap for removably attaching said disposable working tip to said end of the reusable elongated shaft.
Claim 10
Dependent Claim
33 words
A disposable working tip as defined in claim 8 wherein the reusable elongated shaft includes a portion defining a window and said engagement means includes a locking tongue adapted to interengage the window.
Claim 11
Dependent Claim
37 words
A disposable working tip as defined in claim 8 wherein said end cap includes a second passageway for allowing a tube to pass therethrough, said tube being permanently disposed from the end of the reusable elongated shaft.
Claim 12
Dependent Claim
19 words
A disposable working tip as defined in claim 10 wherein the tube is adapted to provide irrigation during surgery.
Claim 13
Dependent Claim
19 words
A disposable working tip as defined in claim 10 wherein the tube is adapted to provide suction during surgery.
Claim 14
Dependent Claim
171 words
An instrument for use in endoscopically manipulating and coagulating tissue comprising: a reusable elongated shaft having a proximal end and a distal end, the proximal end having first and second electrical connectors adapted to be coupled to a power supply; and a working end having a working surface for contacting tissue and a cross-section extending perpendicularly to the working surface, the working end integrally formed of a heating element, the working surface maintained at an auto-regulated temperature by conducting a current throughout the entire cross-section of the working end, the heating element comprising a material having a skin depth extending substantially throughout the cross-section of the working end responsive to the temperature of the heating element and that decreases as the temperature of the heating element falls below the auto-regulated temperature; first and second terminals electrically coupled to the working end and adapted to be coupled to the first and second electrical connectors, respectively; and means for removably coupling the working end to the distal end of the reusable elongated shaft.
Claim 15
Dependent Claim
171 words
An instrument for use in endoscopically manipulating and coagulating tissue comprising: a reusable elongated shaft having a proximal end and a distal end, the proximal end having first and second electrical connectors adapted to be coupled to a power supply; and a working end having a working surface for contacting tissue and a cross-section extending perpendicularly to the working surface, the working end integrally formed of a heating element, the working surface maintained at an auto-regulated temperature by conducting a current throughout the entire cross-section of the working end, the heating element comprising a material having a skin depth extending substantially throughout the cross-section of the working end responsive to the temperature of the heating element and that decreases as the temperature of the heating element falls below the auto-regulated temperature; first and second terminals electrically coupled to the working end and adapted to be coupled to the first and second electrical connectors, respectively; and means for removably coupling the working end to the distal end of the reusable elongated shaft.
Claim 16
Dependent Claim
21 words
An instrument as defined in claim 13 wherein the material further comprises a material that exhibits a Curie transition in permeability.
Claim 17
Dependent Claim
15 words
An instrument as defined in claim 14 wherein the material further comprises a ferromagnetic material.
Claim 18
Dependent Claim
31 words
An instrument as defined in claim 13 wherein the working surface further comprises a tapered edge for thermally-enhanced cutting of tissue at a temperature in the range of the auto-regulated temperature.
Claim 19
Dependent Claim
32 words
An instrument as defined in claim 13 wherein the working end further comprises a material that can be bent and configured during surgery in order to reach tissue otherwise difficult to access.
Claim 20
Dependent Claim
29 words
An instrument as defined in claim 13 wherein the working surface further comprises a coating of electrically-insulating non-stick material to reduce the accumulation of coagulum on the working surface.
Claim 21
Dependent Claim
48 words
A disposable working tip as defined in claim 13 further comprising: an end cap having a passageway therethrough adapted to permanently hold the working end; and engagement means disposed on said end cap for removably attaching said disposable working tip to said end of the reusable elongated shaft.
Claim 22
Dependent Claim
31 words
An instrument as defined in claim 19 wherein the reusable elongated shaft includes a portion defining a window and said engagement means includes a locking tongue adapted to interengage the window.
Claim 23
Dependent Claim
36 words
An instrument as defined in claim 19 wherein said end cap includes a second passageway for allowing a tube to pass therebetween, said tube being permanently disposed from the distal end of the reusable elongated shaft.
Claim 24
Dependent Claim
19 words
An instrument as defined in claim 21 wherein the tube is adapted to provide irrigation or suction during surgery.
Claim 25
Dependent Claim
190 words
A disposable working tip for use in endoscopically manipulating and hemostatically cutting tissue, the disposable working tip adapted to be removably connected to the end of a reusable elongated shaft, the disposable working tip comprising: a working end having a working surface for contacting tissue and a cross-section extending perpendicularly to the working surface, the working end integrally formed of a heating element, the working surface maintained at an auto-regulated temperature by conducting a current throughout the entire cross-section of the working end, the working surface including an atraumatic edge that becomes capable of cutting tissue when heated to a temperature in the range of the auto-regulated temperature, the heating element comprising a material having a skin depth extending substantially throughout the cross-section of said working end responsive to the temperature of the heating element and that decreases as the temperature of the heating element falls below the auto-regulated temperature; first and second terminals electrically coupled to the working end and adapted to be removably attached to the end of the reusable elongated shaft; and means for coupling the disposable working tip to the end of the reusable elongated shaft.
Claim 26
Dependent Claim
190 words
A disposable working tip for use in endoscopically manipulating and hemostatically cutting tissue, the disposable working tip adapted to be removably connected to the end of a reusable elongated shaft, the disposable working tip comprising: a working end having a working surface for contacting tissue and a cross-section extending perpendicularly to the working surface, the working end integrally formed of a heating element, the working surface maintained at an auto-regulated temperature by conducting a current throughout the entire cross-section of the working end, the working surface including an atraumatic edge that becomes capable of cutting tissue when heated to a temperature in the range of the auto-regulated temperature, the heating element comprising a material having a skin depth extending substantially throughout the cross-section of said working end responsive to the temperature of the heating element and that decreases as the temperature of the heating element falls below the auto-regulated temperature; first and second terminals electrically coupled to the working end and adapted to be removably attached to the end of the reusable elongated shaft; and means for coupling the disposable working tip to the end of the reusable elongated shaft.
Claim 27
Dependent Claim
23 words
A disposable working tip as defined in claim 23 wherein the material further comprises a material that exhibits a Curie transition in permeability.
Claim 28
Dependent Claim
17 words
A disposable working tip as defined in claim 24 wherein the material further comprises a ferromagnetic material.
Claim 29
Dependent Claim
33 words
A disposable working tip as defined in claim 23 wherein the atraumatic edge comprises a tapered edge defining an apex having an angle in the range of approximately 15 to approximately 50 degrees.
Claim 30
Dependent Claim
34 words
A disposable working tip as defined in claim 23 wherein the working end further comprises a material that can be bent and configured during surgery in order to reach tissue otherwise difficult to access.
Claim 31
Dependent Claim
31 words
A disposable working tip as defined in claim 23 wherein the working surface further comprises a coating of electrically-insulating non-stick material to reduce the accumulation of coagulum on the working surface.
Claim 32
Dependent Claim
48 words
A disposable working tip as defined in claim 23 further comprising: an end cap having a passageway therethrough adapted to permanently hold the working end; and engagement means disposed on said end cap for removably attaching said disposable working tip to said end of the reusable elongated shaft.
Claim 33
Dependent Claim
33 words
A disposable working tip as defined in claim 29 wherein the reusable elongated shaft includes a portion defining a window and the engagement means includes a locking tongue adapted to interengage the window.
Claim 34
Dependent Claim
45 words
A disposable working tip as defined in claim 29 wherein said end cap includes a second passageway for allowing a tube to pass therethrough, the tube being permanently disposed from the end of the reusable elongated shaft, the tube adapted to provide suction or irrigation.
Claim 35
Dependent Claim
197 words
An instrument for use in endoscopically manipulating and hemostatically cutting tissue comprising: a reusable elongated shaft having a proximal end and a distal end, the proximal end having first and second electrical connectors adapted to be coupled to a power supply; and a working end having a working surface for contacting tissue and a cross-section extending perpendicularly to the working surface, the working end integrally formed of a heating element, the working surface maintained at an auto-regulated temperature by conducting a current throughout the entire cross-section of the working end, the working surface including an atraumatic edge that becomes capable of cutting tissue when heated to a temperature in the range of the auto-regulated temperature, the heating element comprising a material having a skin depth extending substantially throughout the cross-section of the working end responsive to the temperature of the heating element and that decreases as the temperature of the heating element falls below the auto-regulated temperature; first and second terminals electrically coupled to the working end and adapted to be coupled to the first and second electrical connectors, respectively; and means for removably coupling the working end to the distal end of the reusable elongated shaft.
Claim 36
Dependent Claim
197 words
An instrument for use in endoscopically manipulating and hemostatically cutting tissue comprising: a reusable elongated shaft having a proximal end and a distal end, the proximal end having first and second electrical connectors adapted to be coupled to a power supply; and a working end having a working surface for contacting tissue and a cross-section extending perpendicularly to the working surface, the working end integrally formed of a heating element, the working surface maintained at an auto-regulated temperature by conducting a current throughout the entire cross-section of the working end, the working surface including an atraumatic edge that becomes capable of cutting tissue when heated to a temperature in the range of the auto-regulated temperature, the heating element comprising a material having a skin depth extending substantially throughout the cross-section of the working end responsive to the temperature of the heating element and that decreases as the temperature of the heating element falls below the auto-regulated temperature; first and second terminals electrically coupled to the working end and adapted to be coupled to the first and second electrical connectors, respectively; and means for removably coupling the working end to the distal end of the reusable elongated shaft.
Claim 37
Dependent Claim
23 words
A disposable working tip as defined in claim 32 wherein the material further comprises a material that exhibits a Curie transition in permeability.
Claim 38
Dependent Claim
17 words
A disposable working tip as defined in claim 33 wherein the material further comprises a ferromagnetic material.
Claim 39
Dependent Claim
33 words
A disposable working tip as defined in claim 32 wherein the atraumatic edge comprises a tapered edge defining an apex having an angle in the range of approximately 15 to approximately 50 degrees.
Claim 40
Dependent Claim
34 words
A disposable working tip as defined in claim 32 wherein the working end further comprises a material that can be bent and configured during surgery in order to reach tissue otherwise difficult to access.
Claim 41
Dependent Claim
31 words
A disposable working tip as defined in claim 32 wherein the working surface further comprises a coating of electrically-insulating non-stick material to reduce the accumulation of coagulum on the working surface.
Claim 42
Dependent Claim
48 words
A disposable working tip as defined in claim 32 further comprising: an end cap having a passageway therethrough adapted to permanently hold the working end; and engagement means disposed on said end cap for removably attaching said disposable working tip to said end of the reusable elongated shaft.
Claim 43
Dependent Claim
33 words
A disposable working tip as defined in claim 38 wherein the reusable elongated shaft includes a portion defining a window and the engagement means includes a locking tongue adapted to interengage the window.
Claim 44
Dependent Claim
45 words
A disposable working tip as defined in claim 38 wherein said end cap includes a second passageway for allowing a tube to pass therethrough, the tube being permanently disposed from the end of the reusable elongated shaft, the tube adapted to provide suction or irrigation.
References Cited (Backward Citations)
US1975436A
Cited
US2181274A
Cited
US2951927A
Cited
US2947841A
Cited
US3218384A
Cited
GB1076772A
Cited
US3296364A
Cited
US3316344A
Cited
US3515837A
Cited
US3489884A
Cited
US3524966A
Cited
US3584190A
Cited
US4185632A
Cited
US4207896A
Cited
US3826263A
Cited
US3662152A
Cited
JPS495699A
Cited
US3768482A
Cited
US4079192A
Cited
JPS5084373A
Cited
US3975819A
Cited
US3987795A
Cited
US4091813A
Cited
JPS5457242A
Cited
US4701587A
Cited
US4256945A
Cited
US4848337A
Cited
US4481057A
Cited
US4485810A
Cited
US4456186A
Cited
EP0107927A1
Cited
EP0110692A1
Cited
EP0130671A2
Cited
US4615330A
Cited
US4745264A
Cited
US4626767A
Cited
US4839501A
Cited
EP0209215A1
Cited
USRE33644E
Cited
US4640279A
Cited
US4869248A
Cited
US4936842A
Cited
US4802476A
Cited
US4770067A
Cited
US5078256A
Cited
US5089002A
Cited
US5223689A
Cited
US5047025A
Cited
US5013312A
Cited
US5071419A
Cited
US5080660A
Cited
US5197963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-01 | 1999-07-03 | 2000-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-01 | 2003-07-03 | 2004-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-01 | 2007-07-03 | 2008-01-02 | $7700.00 | Window Closed / Lapsed |