Medication infusion set
First Claim
1. A medication infusion set for transcutaneous delivery of a selected medication to a patient, said infusion set comprising:
- a cannula housing having a soft cannula mounted thereon with a distal end of said cannula protruding from said cannula housing, a resilient self-sealing septum mounted on said cannula housing generally at a proximal end of said cannula for normally closing said cannula proximal end, and a retainer mounted within said cannula housing for retaining said septum within said cannula housing, wherein said retainer comprises a retainer clip for snap-fit mounting within said cannula housing, said retainer clip having a needle port formed therein; and
an infusion hub having an infusion needle mounted thereon with a distal end of said infusion needle protruding from said infusion hub and being adapted for connection to a source of the selected medication, said infusion needle being adapted for insertion through said septum for coupling with said cannula,wherein said infusion hub further includes a protective shroud protruding therefrom in overlying relation with said infusion needle, said shroud being a guide slidably insertable into a generally matingly shaped slot formed in said cannula housing for one-way guided reception of said infusion needle through said septum andwherein said cannula housing and said infusion hub further includes releasibly interengageable latch members for releasibly connecting said infusion hub to said cannula housing with said infusion needle inserted through said septum.
2 Assignments
0 Petitions
Accused Products
Abstract
An improved medication infusion set is provided of the type having a soft cannula for subcutaneous delivery of a selected medication to a patient. The infusion set comprises a cannula housing having a soft cannula protruding therefrom and a self-sealing septum mounted at an upstream end of the cannula. The cannula housing is initially assembled with an insertion hub having an elongated insertion needle extending through the septum and cannula for transcutaneously placing the cannula followed by separation of the insertion hub from the cannula housing. An infusion hub is then assembled with the cannula housing and includes a short infusion needle for coupling the cannula with the selected medication supplied from a source via a length of infusion tubing. The infusion hub includes a protective shroud plate protruding beyond a tip end of the infusion needle to minimize risk of patient contact therewith, and adapted for slide-fit reception into a matingly shaped slot formed in the cannula housing to insure a one-way and high strength interconnection between the cannula housing and infusion hub. Releasible latch members interlock the infusion hub with the cannula housing in a manner permitting periodic separation when desired.
696 Citations
35 Claims
-
1. A medication infusion set for transcutaneous delivery of a selected medication to a patient, said infusion set comprising:
-
a cannula housing having a soft cannula mounted thereon with a distal end of said cannula protruding from said cannula housing, a resilient self-sealing septum mounted on said cannula housing generally at a proximal end of said cannula for normally closing said cannula proximal end, and a retainer mounted within said cannula housing for retaining said septum within said cannula housing, wherein said retainer comprises a retainer clip for snap-fit mounting within said cannula housing, said retainer clip having a needle port formed therein; and an infusion hub having an infusion needle mounted thereon with a distal end of said infusion needle protruding from said infusion hub and being adapted for connection to a source of the selected medication, said infusion needle being adapted for insertion through said septum for coupling with said cannula, wherein said infusion hub further includes a protective shroud protruding therefrom in overlying relation with said infusion needle, said shroud being a guide slidably insertable into a generally matingly shaped slot formed in said cannula housing for one-way guided reception of said infusion needle through said septum and wherein said cannula housing and said infusion hub further includes releasibly interengageable latch members for releasibly connecting said infusion hub to said cannula housing with said infusion needle inserted through said septum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A medication infusion set for transcutaneous delivery of a selected medication to a patient, said infusion set comprising:
-
a cannula housing having a soft cannula mounted thereon with a distal end of said cannula protruding from said cannula housing, and a resilient self-sealing septum mounted on said cannula housing generally at a proximal end of said cannula for normally closing said cannula proximal end; and an infusion hub having an infusion needle mounted thereon with a distal end of said infusion needle protruding from said infusion hub and being adapted for connection to a source of the selected medication said infusion needle being adapted for insertion through said septum for coupling with said cannula, wherein said infusion hub further includes a protective shroud plate protruding therefrom in overlying relation with said infusion needle said shroud plate being slidably insertable into a generally matingly shaped slot formed in said cannula housing for guided reception of said infusion needle through said septum, wherein said cannula housing and said infusion hub further includes releasibly interengageable latch members for releasibly connecting said infusion hub to said cannula housing with said infusion needle inserted through said septum, and wherein said shroud plate comprises a plurality of generally planar facets, said slot formed in said cannula housing being generally matingly shaped for one-way reception of said shroud plate. - View Dependent Claims (21, 22)
-
-
23. A medication infusion set for transcutaneous delivery of a selected medication to a patient, said infusion set comprising:
-
a cannula housing having a soft cannula mounted thereon with a distal end of said cannula protruding from said cannula housing, and a resilient self-sealing septum mounted on said cannula housing generally at a proximal end of said cannula for normally closing said cannula proximal end; and an infusion hub having an infusion needle mounted thereon with a distal end of said infusion needle protruding from said infusion hub and being adapted for connection to a source of the selected medication, said infusion needle being adapted for insertion through said septum for coupling with said cannula, wherein said infusion hub further including a protective shroud plate of multifaceted configuration protruding therefrom in overlying relation with said infusion needle and projecting from said infusion hub at least slightly beyond a distal tip end of said infusion needle, said shroud plate being slidably insertable into a generally matingly shaped slot formed in said cannula housing for one-way guided reception of said infusion needle through said septum, and wherein said cannula housing and said infusion hub further including releasibly interengageable latch members for releasibly connecting said infusion hub to said cannula housing with said infusion needle inserted through said septum. - View Dependent Claims (24, 25)
-
-
26. A medication infusion set for transcutaneous delivery of a selected medication to a patient, said infusion set comprising:
-
a cannula housing; a soft cannula; a rigid tubular needle guide having a downstream end press-fit mounted with a proximal end of said soft cannula, said needle guide and said cannula proximal end being carried within a bore formed in said cannula housing with a distal end of said cannula protruding from said cannula housing, said needle guide having an upstream end flared outwardly in a generally conical configuration; a resilient self-sealing septum; and a retainer for retaining said septum seated within said flared upstream of said needle guide, wherein said retainer fits within the cannula housing. - View Dependent Claims (27, 28, 29, 30, 31, 32)
-
-
33. A medication infusion set for transcutaneous delivery of a selected medication to a patient, said infusion set comprising:
-
a cannula housing having a soft cannula mounted thereon with a distal end of said cannula protruding from said cannula housing, and a resilient self-sealing septum mounted on said cannula housing generally at a proximal end of said cannula for normally closing said cannula proximal end; and an infusion hub having an infusion needle mounted thereon with a distal end of said infusion needle protruding from said infusion hub and being adapted for connection to a source of the selected medication, said infusion needle being adapted for insertion through said septum for coupling with said cannula, wherein said infusion hub further includes a protective shroud protruding therefrom in overlying relation with said infusion needle, said shroud being a guide slidably insertable into a generally matingly shaped slot formed in said cannula housing for one-way guided reception of said infusion needle through said septum, wherein said cannula housing and said infusion hub further includes releasibly interengageable latch members for releasibly connecting said infusion hub to said cannula housing with said infusion needle inserted through said septum, and wherein said septum comprises a resilient self-sealing ball.
-
-
34. A medication infusion set for transcutaneous delivery of a selected medication to a patient, said infusion set comprising:
-
a cannula housing having a soft cannula mounted thereon with a distal end of said cannula protruding from said cannula housing, and a resilient self-sealing septum mounted on said cannula housing generally at a proximal end of said cannula for normally closing said cannula proximal end; and an infusion hub having an infusion needle mounted thereon with a distal end of said infusion needle protruding from said infusion hub and being adapted for connection to a source of the selected medication, said infusion needle being adapted for insertion through said septum for coupling with said cannula, wherein said infusion hub further including a protective shroud plate of multifaceted configuration protruding therefrom in overlying relation with said infusion needle and projecting from said infusion hub at least slightly beyond a distal tip end of said infusion needle, said shroud plate being slidably insertable into a generally matingly shaped slot formed in said cannula housing for one-way guided reception of said infusion needle through said septum, wherein said cannula housing and said infusion hub further including releasibly interengageable latch members for releasibly connecting said infusion hub to said cannula housing with said infusion needle inserted through said septum, and wherein said shroud plate has a three-sided construction.
-
-
35. A medication infusion set for transcutaneous delivery of a selected medication to a patient, said infusion set comprising:
-
a cannula housing; a soft cannula; a rigid tubular needle guide having a downstream end press-fit mounted with a proximal end of said soft cannula, said needle guide and said cannula proximal end being carried within a bore formed in said cannula housing with a distal end of said cannula protruding from said cannula housing, said needle guide having an upstream end flared outwardly in a generally conical configuration; a resilient self-sealing septum; and a retainer for retaining said septum seated within said flared upstream of said needle guide, wherein said needle guide downstream end is press-fitted into said cannula proximal end, and wherein a channel is formed in an underside surface of said cannula housing, and further including an adhesive layer covering said underside surface.
-
Specification