US4317458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode apparatus for pacing
Assignee: Top KK
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Filing: 1980-04-22
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Granted: 1982-03-02
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Expires: 2000-04-22
Abstract
Abstract An electrode apparatus for cardiac pacing suitable for use in an emergency in which there is provided a needle, a sheath and an electrode needle wire. First, the chest wall is pierced through with the needle covered with the sheath. Thereafter, the needle is pulled out from the sheath and, in place thereof, the electrode needle wire is inserted and subsequently the heart is pierced with the electrode needle wire in preparation for the pacing operation.
Inventors
- 👤 Masayoshi Yokoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:41
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/0502; A61B; A61B17/00; A61B17/34; A61B17/3468; A61D; A61D1/00; A61N1/0587
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
An apparatus for cardiac pacing comprising: a hollow needle for making a piercing hole in the chest wall of a person; a plastic tubular sheath covering the needle with the exception of a sharp-pointed portion of the needle; said plastic tubular sheath being slidable and removable in relation to said needle; and an elastic electrode needle wire insertable into said sheath adapted for piercing the heart of the person through a hollow opening of said sheath after said needle is pulled out subsequently to piercing the chest wall by said needle together with said sheath; said sheath being formed at its forward end portion into a taper; said electrode needle wire having an insulation coating applied at its greater part, with the exception of a forward end portion and a rearward end portion thereof; said electrode needle wire having upper and lower criterion marks; said lower criterion mark being spaced from the top of said electrode needle wire by a length equal to the length of said sheath, said criterion marks being spaced from each other by a distance equal to the length of a forward end portion of said electrode needle wire.
Claim 2
Independent Claim
193 words
An apparatus for cardiac pacing comprising: a hollow needle for making a piercing hole in the chest wall of a person; a plastic tubular sheath covering the needle with the exception of a sharp-pointed portion of the needle; said plastic tubular sheath being slidable and removable in relation to said needle; and an elastic electrode needle wire insertable into said sheath adapted for piercing the heart of the person through a hollow opening of said sheath after said needle is pulled out subsequently to piercing the chest wall by said needle together with said sheath; said sheath being formed at its forward end portion into a taper; said electrode needle wire having an insulation coating applied at its greater part, with the exception of a forward end portion and a rearward end portion thereof; said electrode needle wire having upper and lower criterion marks; said lower criterion mark being spaced from the top of said electrode needle wire by a length equal to the length of said sheath, said criterion marks being spaced from each other by a distance equal to the length of a forward end portion of said electrode needle wire.
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) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |