Patent US4313434A successfully refreshed from Google Patents.
US4313434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fracture fixation
Assignee: Individual
•
Filing: 1980-10-17
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Granted: 1982-02-02
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Expires: 2000-10-17
Abstract
Abstract Fixation of a long bone is accomplished by drilling a small opening into the medullary cavity, inserting a deflated flexible bladder into the medullary cavity through the opening, inflating the bladder with sterile air through an opening accessible outside the bone, sealing the opening, unsealing the opening after the fracture has healed, removing the bladder and then filling the opening.
Inventors
- 👤 David Segal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:18
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/72; A61B17/7233; A61B17/7258; A61B17/7275; A61B2017/00535; A61B2017/00544; A61B2017/00557; Y; Y10; Y10S; Y10S128/00; Y10S128/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
66 words
A method of long bone fixation which method includes the steps of, forming an opening in a long bone extending from the outside of the bone into the medullary cavity, inserting a deflated flexible bladder through said opening into said medullary cavity, and then inflating said bladder until the inflated bladder firmly engages the walls of said medullary cavity to provide fixation of said long bone.
Claim 2
Independent Claim
66 words
A method of long bone fixation which method includes the steps of, forming an opening in a long bone extending from the outside of the bone into the medullary cavity, inserting a deflated flexible bladder through said opening into said medullary cavity, and then inflating said bladder until the inflated bladder firmly engages the walls of said medullary cavity to provide fixation of said long bone.
Claim 3
Dependent Claim
39 words
A method of long bone fixation in accordance with claim 1 wherein said bladder is inflated through an opening accessible from outside said bone and further including the step of sealing said opening after said bladder has been inflated.
Claim 4
Dependent Claim
26 words
A method in accordance with claim 2 and further including the step of unsealing said opening after said long bone has healed to deflate said bladder.
Claim 5
Dependent Claim
16 words
A method in accordance with claim 3 and further including the step of removing said bladder.
Claim 6
Dependent Claim
16 words
A method in accordance with claim 4 and further including the step of filling said opening.
Claim 7
Dependent Claim
25 words
A long bone fixation made in accordance with the method of claim 2 with said inflated bladder firmly engaging the walls of said medullary cavity.
Claim 8
Dependent Claim
30 words
A long bone fixation in accordance with claim 6 wherein said bladder is made of material from the group consisting of natural rubber-like material, synthetic rubber-like material and flexible plastic.
Claim 9
Dependent Claim
31 words
A long bone fixation in accordance with claim 6 and further comprising fluid means inside said bladder for maintaining said bladder in firm engagement with the walls of said medullary cavity.
Claim 10
Dependent Claim
29 words
A long bone fixation in accordance with claim 8 wherein said fluid means is from the group consisting of sterile air, sterile oxygen, sterile nitrogen, sterile gas and liquid.
Claim 11
Dependent Claim
38 words
A long bone fixation in accordance with claim 6 wherein said bladder is formed with an inflated shape that is narrower in the middle than at each end for improved conformity with the shape of said medullary cavity.
Claim 12
Dependent Claim
19 words
A long bone fixation in accordance with claim 6 wherein the outer surface of said inflated bladder is serrated.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |