Patent US4520810A successfully refreshed from Google Patents.
US4520810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for performing an emergency cricothyrotomy
Assignee: Bivona Inc
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Filing: 1984-04-24
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Granted: 1985-06-04
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Expires: 2004-04-24
Abstract
Abstract An improved apparatus and method for performing an emergency cricothyrotomy comprising a tracheostomy device which can be inserted into a patient's neck without danger of puncture of the posterior wall and which permits insertion of an airway tube without popping out of the device from the incision in the patient's neck or penetrating the posterior wall. An airway tube can be quickly and easily substituted for another airway tube of differing internal diameter without the need for redefining the puncture area or utilization of additional instrumentation. If desired, a closed system can be quickly and easily coupled to the device without the need for making a bigger opening in the patient's neck.
Inventors
- 👤 Sol Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:53
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/04; A61M16/0465; A61M16/0472; A61B; A61B17/00; A61B17/34; A61B17/3415
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
429 words
A surgical device adapted to puncture human skin for performing an emergency tracheostomy comprising: a housing, a hollow needle insertible in and retained in said housing and having a proximal end portion and a distal end portion of a reduced cross-sectional area, said distal end portion of said needle comprising at least two sections which, taken together, define a throughbore and terminate in a blunt distal end; spring means for holding said sections of said distal end portion of said needle together and to enable said sections of said distal end portion of said needle to be separable from each other and expand radially from the said reduced cross-sectional area of said distal end portion; a stylet of lesser cross-sectional area than said distal end portion and insertible in said throughbore through said needle without expansion of said sections, said stylet having a distal cutting end for limited projection beyond said blunt distal end of said needle for a cooperative insertion of the distal ends of the needle and stylet into a skin incision, and a wider main body portion on the proximal end thereof; first indexing means on the proximal end of the housing and cooperative second indexing means on the main body portion of said stylet; an airway tube movable through said needle, subsequent to removal of the stylet from the proximal end portion thereof to the distal end thereof, said airway tube being of larger cross-sectional area than the said cross-sectional area of said distal end portion of said needle whereby to expand radially said distal end portion of said needle from its normal cross-sectional area as said airway tube is moved through the distal end portion and distal end of said needle, said needle including guiding means for guiding said airway tube through said needle and camming said needle sections apart gradually and progressively before the tube reaches the skin level, said guiding means including an intermediate portion on each of the needle sections, each intermediate portion of said needle sections having an elongated tapered internal area between said proximal end portion and said distal end portion thereof, said internal tapered area being defined by elongated protrusions extending along said intermediate portion and extending interiorly thereof for guidance of said airway tube from the proximal end portion into the distal end portion such that, when said needle sections have their ends inserted into the trachea of a patient, said airway tube engages said guiding means and said guiding means cams said needle sections apart gradually and progressively before the airway tube reaches the skin level.
Claim 2
Dependent Claim
429 words
A surgical device adapted to puncture human skin for performing an emergency tracheostomy comprising: a housing, a hollow needle insertible in and retained in said housing and having a proximal end portion and a distal end portion of a reduced cross-sectional area, said distal end portion of said needle comprising at least two sections which, taken together, define a throughbore and terminate in a blunt distal end; spring means for holding said sections of said distal end portion of said needle together and to enable said sections of said distal end portion of said needle to be separable from each other and expand radially from the said reduced cross-sectional area of said distal end portion; a stylet of lesser cross-sectional area than said distal end portion and insertible in said throughbore through said needle without expansion of said sections, said stylet having a distal cutting end for limited projection beyond said blunt distal end of said needle for a cooperative insertion of the distal ends of the needle and stylet into a skin incision, and a wider main body portion on the proximal end thereof; first indexing means on the proximal end of the housing and cooperative second indexing means on the main body portion of said stylet; an airway tube movable through said needle, subsequent to removal of the stylet from the proximal end portion thereof to the distal end thereof, said airway tube being of larger cross-sectional area than the said cross-sectional area of said distal end portion of said needle whereby to expand radially said distal end portion of said needle from its normal cross-sectional area as said airway tube is moved through the distal end portion and distal end of said needle, said needle including guiding means for guiding said airway tube through said needle and camming said needle sections apart gradually and progressively before the tube reaches the skin level, said guiding means including an intermediate portion on each of the needle sections, each intermediate portion of said needle sections having an elongated tapered internal area between said proximal end portion and said distal end portion thereof, said internal tapered area being defined by elongated protrusions extending along said intermediate portion and extending interiorly thereof for guidance of said airway tube from the proximal end portion into the distal end portion such that, when said needle sections have their ends inserted into the trachea of a patient, said airway tube engages said guiding means and said guiding means cams said needle sections apart gradually and progressively before the airway tube reaches the skin level.
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) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |