Intramedullary canal seal for cement pressurization
First Claim
1. A method for inserting bone cement through the open proximal end of a prepared intramedullary canal of a bone and into said canal, and pressurizing said cement therein, prior to the cementation of a surgical implant within said canal, said method comprising the steps of(a) providing a bone cement extruder having a nozzle;
- (b) providing a cannula comprising a hollow tube having a distal end and a proximal end, an inflatable cuff surrounding at least a portion of said tube, and means to inflate said cuff, with said tube being adapted to receive said nozzle in sliding fit;
(c) sliding said tube over said nozzle so that said cannula is held by said extruder;
(d) inserting said nozzle and said cannula through said open end into said intramedullary canal;
(e) inflating said inflatable cuff so that it forms a seal against the wall of said canal; and
(f) applying bone cement through said nozzle into said canal until said cement becomes pressurized,whereby escape of cement through the open end of said intramedullary canal is prevented by said seal.
6 Assignments
0 Petitions
Accused Products
Abstract
A novel cannula is disclosed for use in the application of bone cement to the prepared intramedullary canal of a bone prior to the cementation of a surgical implant therein. The novel cannula comprises a hollow tube adapted to slidingly receive the nozzle of a bone cement extruder, an inflatable cuff surrounding the tube, and means to inflate the cuff. In operation, the inflated cuff forms a seal against the wall of the intramedullary canal, thereby preventing escape of cement through the open end of the prepared canal and insuring that the applied cement is properly pressurized within the canal. As a result, a highly secure cementation of the surgical implant within the intramedullary canal is achieved.
284 Citations
9 Claims
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1. A method for inserting bone cement through the open proximal end of a prepared intramedullary canal of a bone and into said canal, and pressurizing said cement therein, prior to the cementation of a surgical implant within said canal, said method comprising the steps of
(a) providing a bone cement extruder having a nozzle; -
(b) providing a cannula comprising a hollow tube having a distal end and a proximal end, an inflatable cuff surrounding at least a portion of said tube, and means to inflate said cuff, with said tube being adapted to receive said nozzle in sliding fit; (c) sliding said tube over said nozzle so that said cannula is held by said extruder; (d) inserting said nozzle and said cannula through said open end into said intramedullary canal; (e) inflating said inflatable cuff so that it forms a seal against the wall of said canal; and (f) applying bone cement through said nozzle into said canal until said cement becomes pressurized, whereby escape of cement through the open end of said intramedullary canal is prevented by said seal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A cannula for use in inserting bone cement into the intramedullary canal of a bone and pressurizing said cement therein comprising a hollow tube having a distal end and a proximal end, an inflatable cuff surrounding at least a portion of said tube, and means to inflate said cuff,
with said inflatable cuff having a substantially frustoconical shape when inflated and unrestrained, and with said cuff being adapted to form a seal against the wall of said intramedullary canal when said cannula is inserted into said canal and said cuff is inflated.
Specification