Patent US1824577A successfully refreshed from Google Patents.
US4158893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective sleeve for implantable prosthesis and method of protecting the prosthesis
Assignee: Wright Medical Technology Inc
•
Filing: 1976-10-12
•
Granted: 1979-06-26
•
Expires: 1996-10-12
Abstract
Abstract A protective device for a surgically implantable prosthesis having a pair of outwardly directed intramedullary stem portions, includes an elongated, one-piece sleeve defining a passage for receipt of one of said stem portions and insertable within one of the intramedullary canals of the bones adjacent the joint. The sleeve has an end portion extending from the canal and protecting the implant from lacerations or tearing by the edges of the bone.
Inventors
- 👤 Alfred B. Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:10
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30721; A61F2/30728; A61F2/42; A61F2/4241; A61F2/0095; A61F2/4261; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30138; A61F2002/30153; A61F2002/30154; A61F2002/30158; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30362; A61F2002/30364; A61F2002/30367; A61F2002/30535; A61F2002/30563; A61F2002/30594; A61F2002/30667; A61F2002/30718; A61F2002/30731; A61F2/30767; A61F2/30771; A61F2002/3082; A61F2/30907; A61F2002/30919; A61F2/4225; A61F2002/4228; A61F2002/4251; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2230/00; A61F2230/0002; A61F2230/0017; A61F2230/0019; A61F2230/0021; A61F2230/0026
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
137 words
A protective device for a flexible surgically implantable prosthesis used in replacing knuckle bone joints, the prosthesis being of the type having at least one outwardly directed stem portion, corresponding generally to the dimensions of the intramedullary canal of a bone adjacent said joint for implantation therein, said device comprising: an elongated one-piece member defining a passage for receipt of said stem portion of said prosthesis, said member being insertable within said intramedullary canal and including a protective end portion dimensioned to extend adjacent the open end of said canal and to cover the exterior surface of the bone edge to protect said prosthesis from impingement by the end of said bone said protective device being fabricated from a material permitting reciprocating movement between the stem of the prosthesis and the interior surface of the protective device.
Claim 2
Dependent Claim
137 words
A protective device for a flexible surgically implantable prosthesis used in replacing knuckle bone joints, the prosthesis being of the type having at least one outwardly directed stem portion, corresponding generally to the dimensions of the intramedullary canal of a bone adjacent said joint for implantation therein, said device comprising: an elongated one-piece member defining a passage for receipt of said stem portion of said prosthesis, said member being insertable within said intramedullary canal and including a protective end portion dimensioned to extend adjacent the open end of said canal and to cover the exterior surface of the bone edge to protect said prosthesis from impingement by the end of said bone said protective device being fabricated from a material permitting reciprocating movement between the stem of the prosthesis and the interior surface of the protective device.
Claim 3
Dependent Claim
36 words
A protective device as defined by claim 1 wherein said protective end portion comprises a fluted portion, flared radially outwardly around the circumference of the member to prevent laceration of said prosthesis by said bone end.
Claim 4
Dependent Claim
26 words
A protective device as defined by claim 2 wherein said member has a rectangular exterior surface in cross section to prevent rotation within said intramedullary canal.
Claim 5
Dependent Claim
30 words
A protective device as defined by claim 3 wherein said member has an interior surface in cross section corresponding to the exterior surface of said stem portion of said prosthesis.
Claim 6
Dependent Claim
15 words
A protective device as defined by claim 4 wherein said material is a porous polytetrafluoroethylene.
Claim 7
Dependent Claim
16 words
A protective device as defined by claim 4 wherein said material is a high density polyethylene.
Claim 8
Dependent Claim
33 words
A protective device as defined by claim 4 wherein said member is a sleeve and said sleeve has a length equal to approximately one-third the length of the stem portion of said prosthesis.
Claim 9
Dependent Claim
157 words
In combination, a protective device and a surgically implantable flexible prosthesis used in replacing bone joints and the like, said prosthesis being of the type having at least one outwardly directed stem portion, corresponding generally to the dimensions of the intramedullary canal of a bone adjacent said joint for implantation therein, said protective device comprising: a one-piece member defining a passage receiving said stem portion of said prosthesis, said member being insertable within said intramedullary canal and including a protective end portion dimensioned to extend adjacent the open end of said canal and to cover the exterior surface of the bone edge to protect said prosthesis from impingement by the end of said bone, and said stem portion and said member being sized relative to one another and being of such materials to permit sliding, reciprocating movement of said stem relative to said member subsequent to implantation of said prosthesis thereby protecting the bone from excessive stress.
Claim 10
Dependent Claim
157 words
In combination, a protective device and a surgically implantable flexible prosthesis used in replacing bone joints and the like, said prosthesis being of the type having at least one outwardly directed stem portion, corresponding generally to the dimensions of the intramedullary canal of a bone adjacent said joint for implantation therein, said protective device comprising: a one-piece member defining a passage receiving said stem portion of said prosthesis, said member being insertable within said intramedullary canal and including a protective end portion dimensioned to extend adjacent the open end of said canal and to cover the exterior surface of the bone edge to protect said prosthesis from impingement by the end of said bone, and said stem portion and said member being sized relative to one another and being of such materials to permit sliding, reciprocating movement of said stem relative to said member subsequent to implantation of said prosthesis thereby protecting the bone from excessive stress.
Claim 11
Independent Claim
122 words
A method of protecting a flexible surgically implantable prosthesis used in replacing bone joints and the like, from lacerations and tears caused by contact with the bone edges, the prosthesis being of the type including a midsection and at least one outwardly extending stem portion, the stem portion being insertable into the intramedullary canal of a bone adjacent the joint, comprising the steps of: forming a member defining a passage dimensioned for receipt of one of said stem portions; surgically implanting said member within said intramedullary canal prior to insertion of said stem portion and positioning said member so that the end portion thereof is between the bone edge and said prosthesis and covers said bone edge when said prosthesis is implanted.
Claim 12
Independent Claim
122 words
A method of protecting a flexible surgically implantable prosthesis used in replacing bone joints and the like, from lacerations and tears caused by contact with the bone edges, the prosthesis being of the type including a midsection and at least one outwardly extending stem portion, the stem portion being insertable into the intramedullary canal of a bone adjacent the joint, comprising the steps of: forming a member defining a passage dimensioned for receipt of one of said stem portions; surgically implanting said member within said intramedullary canal prior to insertion of said stem portion and positioning said member so that the end portion thereof is between the bone edge and said prosthesis and covers said bone edge when said prosthesis is implanted.
Claim 13
Dependent Claim
19 words
A method as defined by claim 9 wherein said member has a generally rectangular exterior surface in cross section.
Claim 14
Dependent Claim
28 words
A method as defined by claim 10 including the step of forming said member with a fluted end portion, flared radially outwardly around the circumference of said member.
Claim 15
Dependent Claim
24 words
A method as defined by claim 11 wherein said member is formed from a material which permits bone ingrowth into the exterior surface thereof.
Claim 16
Dependent Claim
16 words
A method as defined by claim 12 wherein said material is a medical quality, porous polytetrafluoroethylene.
Claim 17
Dependent Claim
17 words
A method as defined by claim 11 wherein said member is formed from a high density polyethylene.
Claim 18
Dependent Claim
23 words
A method as defined by claim 14 further including the step of bonding the exterior surface of said member to the intramedullary canal.
References Cited (Backward Citations)
US3820167A
Cited
US3744061A
Cited
DE2154338A1
Cited
DE2253338A1
Cited
GB1443470A
Cited
US3816854A
Cited
US3924274A
Cited
US3875594A
Cited
US3992725A
Cited
DE2545821A1
Cited
US4012796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-25 | 1982-12-25 | 1983-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-25 | 1986-12-25 | 1987-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-25 | 1990-12-25 | 1991-06-26 | $7700.00 | Window Closed / Lapsed |