US4674498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro cautery surgical blade
Assignee: EVERST MEDICAL Corp
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Filing: 1985-07-18
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Granted: 1987-06-23
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Expires: 2005-07-18
Abstract
Abstract An electro surgical instrument comprising a handle and a replaceable blade. The handle includes a blade receiving slot and means for clamping the proximal portion of the blade within the slot. Also formed internally of the handle and within the slot is a cavity for containing an electrical-to-mechanical transducer and a plurality of conductive terminal pad areas. The blade is provided with a pattern of conductors which are insulated from one another and which lead to contact pad areas on the distal portion of the blade. When the blade is appropriately inserted into the handle and clamped in place, the transducer abuts the blade and electrical contact is established to energize the conductors and the transducer whereby the blade may be vibrated at a frequency and amplitude to limit the build-up of tissue debris on the blade during an electro surgery procedure.
Inventors
- 👤 Peter Stasz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:18
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1402; A61B2018/00053; A61B2018/00059; A61B2018/00071; A61B2018/00077; A61B2018/00083; A61B2018/00107; A61B2018/00148; A61B2018/00184; A61B2018/0019; A61B2018/1405; A61B2018/1412; A61B2018/1422
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
39 words
An electro-cautery surgical instrument comprising: (a) an electro-cautery surgical blade means including means for electrically cauterizing tissue; and (b) means for vibrating said surgical blade means at a frequency and amplitude to prevent the build-up of tissue debris thereon.
Claim 2
Dependent Claim
39 words
An electro-cautery surgical instrument comprising: (a) an electro-cautery surgical blade means including means for electrically cauterizing tissue; and (b) means for vibrating said surgical blade means at a frequency and amplitude to prevent the build-up of tissue debris thereon.
Claim 3
Dependent Claim
15 words
The surgical instrument of claim 1 wherein said electro-cautery blade means exhibits a capacitive effect.
Claim 4
Dependent Claim
27 words
The surgical instrument of claim 1 wherein said electro-cautery blade means causes heating of the tissue by a current flowing through said tissue as a resistive element.
Claim 5
Dependent Claim
19 words
The surgical instrument of claim 1 wherein said means for vibrating said surgical blade means is a piezo-ceramic transducer.
Claim 6
Dependent Claim
17 words
The surgical instrument of claim 4 wherein said transducer is affixed directly to said surgical blade means.
Claim 7
Dependent Claim
21 words
The surgical instrument of claim 1 wherein said means for vibrating said surgical blade means is a barium titanate piezo-ceramic transducer.
Claim 8
Dependent Claim
44 words
The surgical instrument of claim 1 and further including power source means electrically connected to said surgical blade means and to said means for vibrating said surgical blade means for powering said surgical blade means and said means for vibrating said surgical blade means.
Claim 9
Dependent Claim
208 words
In combination, a blade holder and a blade comprising: (a) a blade holder including a longitudinal slit for receiving a predetermined portion of said blade and including electrical power source contact pad connection means in said slit; (b) electrical-to-mechanical transducer means positioned in a distal portion of said blade holder; (c) mechanical compression means for drawing said slit into a substantially closed position about both said blade and said transducer means for urging said transducer means into engagement against said blade; and (d) said blade including a proximal portion, a working edge extending distally of said proximal portion, a first conductor extending across said blade, a first insulation layer disposed over said first conductor and up to said working edge of said blade, a second conductor extending generally parallel to said first conductor and spaced by said first insulation layer from said first conductor and from said working edge on at least one side of said blade, a second insulation layer covering said second conductor, and two or more electrical contact pads electrically connected to said first and second conductors and located on said proximal portion of said blade and operatively connected to said contact pad connection means in said slit for coupling electrical energy to said blade.
Claim 10
Dependent Claim
208 words
In combination, a blade holder and a blade comprising: (a) a blade holder including a longitudinal slit for receiving a predetermined portion of said blade and including electrical power source contact pad connection means in said slit; (b) electrical-to-mechanical transducer means positioned in a distal portion of said blade holder; (c) mechanical compression means for drawing said slit into a substantially closed position about both said blade and said transducer means for urging said transducer means into engagement against said blade; and (d) said blade including a proximal portion, a working edge extending distally of said proximal portion, a first conductor extending across said blade, a first insulation layer disposed over said first conductor and up to said working edge of said blade, a second conductor extending generally parallel to said first conductor and spaced by said first insulation layer from said first conductor and from said working edge on at least one side of said blade, a second insulation layer covering said second conductor, and two or more electrical contact pads electrically connected to said first and second conductors and located on said proximal portion of said blade and operatively connected to said contact pad connection means in said slit for coupling electrical energy to said blade.
Claim 11
Dependent Claim
12 words
The combination of claim 8 wherein said transducer means is a piezo-ceramic.
Claim 12
Dependent Claim
15 words
The combination of claim 8 wherein said transducer means is a barium titanate piezo-ceramic transducer.
Claim 13
Dependent Claim
15 words
The combination of claim 8 wherein said transducer means is directly affixed on said blade.
Claim 14
Dependent Claim
45 words
The combination of claim 8 including power source means for powering said blade and power source means for powering said transducer means, each of said power source means being connected to said contact pad connection means of said surgical blade holder by a flexible cable.
Claim 15
Dependent Claim
43 words
The combination of claim 8 wherein said first conductor is a base member of said blade and said second conductor is parallel to and insulatively spaced from said base member to generate a capacitive field therebetween when an electrical potential is connected thereacross.
Claim 16
Dependent Claim
18 words
The combination of claim 8 wherein said first insulation layer is between 0.005 and 0.015 inches in thickness.
Claim 17
Dependent Claim
16 words
The combination of claim 8 wherein said second conductor is less than 0.030 inches in thickness.
Claim 18
Dependent Claim
18 words
The combination of claim 8 wherein said second insulation layer is between 0.005 and 0.0024 inches in thickness.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |