US5849014A
Expired / Lapsed
US
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Cement restrictor system and method of forming a cement plug within the medullary canal of a bone
Assignee: Johnson and Johnson Professional Inc
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Filing: 1997-03-20
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Granted: 1998-12-15
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Expires: 2017-03-20
Abstract
Abstract A cement restrictor system is provided for making a cement plug within the medullary canal of a long bone. The system includes an inflatable body, a conduit having first and second ends that defines a fluid passage to and from the inflatable body, and a shield releasably securable to the conduit. In an exemplary method of making a cement plug with the system an obstruction, such as the shield, is placed in a medullary canal of a long bone beyond the isthmus of the long bone. The obstruction is held in place with the flatable body. A predetermined quantity of bone cement is poured into the medullary canal and localized by the obstruction. The bone cement is allowed to harden; and the conduit and inflatable body are removed from the bone.
Inventors
- 👤 Brooke W. Mastrorio
- 👤 Pierre S. Ostiguy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:17
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4657; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/8802; A61B17/8805; A61B17/8808; A61F2/30721; A61F2/30723; A61F2/4603; A61F2/4614; A61F2/32; A61F2/36; A61F2/3662; A61F2/3676; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/3008; A61F2002/30108; A61F2002/30199; A61F2002/30205; A61F2002/3021; A61F2002/30316; A61F2002/30535; A61F2002/30581; A61F2002/4625; A61F2002/4627; A61F2002/4662; A61F2230/00; A61F2230/0063; A61F2230/0067; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0098
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
107 words
A cement restrictor system for providing a cement bone plug in the medullary canal of a bone, comprising: an inflatable body; a conduit having a first end and a second end, the conduit defining a fluid passage to the to the inflatable body for inflating and deflating the inflatable body; and a shield releasably securable to the conduit, the shield having a proximal surface for impeding the flow of bone cement and a distal surface for abutting the inflatable body, the shield and inflatable body being insertable in the medullary canal to form a seal therein allowing the formation of the cement bone plug adjacent the shield.
Claim 2
Dependent Claim
107 words
A cement restrictor system for providing a cement bone plug in the medullary canal of a bone, comprising: an inflatable body; a conduit having a first end and a second end, the conduit defining a fluid passage to the to the inflatable body for inflating and deflating the inflatable body; and a shield releasably securable to the conduit, the shield having a proximal surface for impeding the flow of bone cement and a distal surface for abutting the inflatable body, the shield and inflatable body being insertable in the medullary canal to form a seal therein allowing the formation of the cement bone plug adjacent the shield.
Claim 3
Dependent Claim
16 words
The cement restrictor system of claim 1, wherein the shield extends radially outward from the conduit.
Claim 4
Dependent Claim
31 words
The cement restrictor system of claim 2, wherein the proximal surface of the shield includes a plurality of protuberances extending therefrom for promoting adhesion of the bone cement to the shield.
Claim 5
Dependent Claim
38 words
The cement restrictor system of claim 3, wherein each of the protuberances includes a stalk having a first end secured to the shield and a second end having a greater diameter than the first end of the stalk.
Claim 6
Dependent Claim
21 words
The cement restrictor system of claim 2, wherein the promixal surface faces the first end of the conduit and is roughened.
Claim 7
Dependent Claim
26 words
The cement restrictor system of claim 1, wherein the shield is located at a point between the first end of the conduit and the inflatable body.
Claim 8
Dependent Claim
76 words
The cement restrictor system of claim 1, wherein the conduit includes: a rigid tubular guide having a first end and a second end, the second end being releasably securable to the shield, and a flexible catheter having a first end and a second end, the flexible catheter being disposed at least partially within the tubular guide, wherein the inflatable body surrounds a portion of the catheter between the shield and the second end of the conduit.
Claim 9
Dependent Claim
20 words
The cement restrictor system of claim 7, further including a radiopaque element proximate the second end of the flexible catheter.
Claim 10
Dependent Claim
23 words
The cement restrictor system of claim 7, further including a plurality of measurement indicia on an exterior portion of the rigid tubular guide.
Claim 11
Dependent Claim
45 words
The cement restrictor system of claim 1, wherein the shield defines an obstruction surface having a diameter greater than the diameter of an isthmus of a selected bone, and wherein the inflatable body is inflatable to a diameter greater than the diameter of the shield.
Claim 12
Dependent Claim
27 words
The cement restrictor system of claim 1, further comprising a collar that is positionable proximate the shield to define a space between the shield and the collar.
Claim 13
Dependent Claim
25 words
The cement restrictor system of claim 11, further comprising a cement supply tube for directing cement into the space between the shield and the collar.
Claim 14
Dependent Claim
17 words
The cement restrictor system of claim 12, wherein the cement supply tube is secured to the collar.
Claim 15
Dependent Claim
57 words
A cement restrictor system comprising: an inflatable body; a conduit having a first end and a second end, the conduit defining a fluid passage to the inflatable body; and a shield releasably securable to the conduit, the shield extending radially outward from the conduit, wherein the shield includes a frustroconical body that is flexible at its periphery.
Claim 16
Dependent Claim
57 words
A cement restrictor system comprising: an inflatable body; a conduit having a first end and a second end, the conduit defining a fluid passage to the inflatable body; and a shield releasably securable to the conduit, the shield extending radially outward from the conduit, wherein the shield includes a frustroconical body that is flexible at its periphery.
Claim 17
Dependent Claim
21 words
The cement restrictor system of claim 14, wherein the frustroconical body includes sealing structure that defines an aperture through the shield.
Claim 18
Dependent Claim
16 words
The cement restrictor system of claim 15, wherein the sealing structure includes two opposed flexible elements.
Claim 19
Dependent Claim
139 words
A cement restrictor system comprising: an inflatable body; a conduit having a first end and a second end, the conduit defining a fluid passage to the inflatable body; and a shield releasably securable to the conduit, wherein the conduit includes: a rigid tubular guide having a first end and a second end, the second end being releasably securable to the shield, and a flexible catheter having a first end and a second end, the flexible catheter being disposed at least partially within the tubular guide, wherein the inflatable body surrounds a portion of the catheter between the shield and the second end of the conduit and the flexible catheter and the inflatable body can be passed through the rigid tubular guide from the second end of the rigid tubular guide to the first end of the rigid tubular guide.
Claim 20
Dependent Claim
139 words
A cement restrictor system comprising: an inflatable body; a conduit having a first end and a second end, the conduit defining a fluid passage to the inflatable body; and a shield releasably securable to the conduit, wherein the conduit includes: a rigid tubular guide having a first end and a second end, the second end being releasably securable to the shield, and a flexible catheter having a first end and a second end, the flexible catheter being disposed at least partially within the tubular guide, wherein the inflatable body surrounds a portion of the catheter between the shield and the second end of the conduit and the flexible catheter and the inflatable body can be passed through the rigid tubular guide from the second end of the rigid tubular guide to the first end of the rigid tubular guide.
Claim 21
Dependent Claim
144 words
A cement restrictor system comprising: a rigid tubular guide having a first end and a second end; a flexible catheter having a first end and a second end, the flexible catheter being positionable at least partially within the tubular guide, wherein the second end of the flexible catheter is extensible from the second end of the tubular guide; an inflatable body surrounding a portion of the catheter proximate the second end of the catheter, wherein the catheter defines a fluid path to and from the interior of the inflatable body; a flexible shield releasably securable to the rigid tubular guide at a point between the first end of the rigid tubular guide and the inflatable body; and a collar that is positionable between the first end of the rigid tubular guide and the shield to define a space between the collar and the shield.
Claim 22
Dependent Claim
144 words
A cement restrictor system comprising: a rigid tubular guide having a first end and a second end; a flexible catheter having a first end and a second end, the flexible catheter being positionable at least partially within the tubular guide, wherein the second end of the flexible catheter is extensible from the second end of the tubular guide; an inflatable body surrounding a portion of the catheter proximate the second end of the catheter, wherein the catheter defines a fluid path to and from the interior of the inflatable body; a flexible shield releasably securable to the rigid tubular guide at a point between the first end of the rigid tubular guide and the inflatable body; and a collar that is positionable between the first end of the rigid tubular guide and the shield to define a space between the collar and the shield.
Claim 23
Dependent Claim
35 words
The cement restrictor system of claim 18, further including a cement supply tube for directing cement into the space between the shield and the collar, wherein the cement supply tube is securable to the collar.
Claim 24
Independent Claim
89 words
A method of forming a cement plug comprising the steps of: placing a first obstruction in a medullary canal of a long bone beyond the isthmus of the long bone; holding the first obstruction in place with an inflatable body such that first obstruction and the inflatable body form a seal in the medullary canal that is effective to prevent the flow of bone cement; depositing a predetermined quantity of bone cement into the medullary canal; and allowing the bone cement to harden to form a cement bone plug.
Claim 25
Independent Claim
89 words
A method of forming a cement plug comprising the steps of: placing a first obstruction in a medullary canal of a long bone beyond the isthmus of the long bone; holding the first obstruction in place with an inflatable body such that first obstruction and the inflatable body form a seal in the medullary canal that is effective to prevent the flow of bone cement; depositing a predetermined quantity of bone cement into the medullary canal; and allowing the bone cement to harden to form a cement bone plug.
Claim 26
Dependent Claim
33 words
The method of claim 20, further comprising the step of deflating the inflatable body and removing the inflatable body from the long bone after the step of allowing the bone cement to harden.
Claim 27
Dependent Claim
60 words
The method of claim 20, further comprising the step of placing a second obstruction in the medullary canal in a spaced apart relationship with the first obstruction to define a space, and wherein the step of depositing includes the step of depositing the predetermined quantity of bone cement into the space defined by the first obstruction and the second obstruction.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-12-14 | 2002-06-15 | 2002-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-14 | 2006-06-15 | 2006-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-14 | 2010-06-15 | 2010-12-15 | $7700.00 | Window Closed / Lapsed |