Infusion Device Provided with Septum Housing
The invention concerns an infusion device for subcutaneous administering a medication or a therapeutic fluid to a patient. Said infusion device comprises a base element ( 1 ), which comprises fluid receiving means for receiving said fluid and fluid communication means for transferring said fluid into a cannula, said base element being provided with at least one recess ( 20 ) accommodating a septum ( 5 ) being pierceable by a needle. Said septum is secured to said base element by a septum housing ( 3 ) in such a way that a fluid transfer volume is formed in said at least one recess between an internal surface of said septum and an inner section of said recess. Said fluid transfer volume is communicating with said fluid communication means, and said septum housing is accommodating a premounted septum. The infusion device is characterized in that the septum housing is fixed and fluid sealed to said base element in said inner section of said recess.
1 - 13 . (canceled)
14 : Infusion device for subcutaneous administering a medication or a therapeutic fluid to a patient, comprising
a base element, comprising
fluid receiving means for receiving said fluid,
fluid communication means for transferring said fluid into a cannula, and
at least one recess for accommodating a septum pierceable by a needle; and
a septum housing accommodating said septum, at least part of said septum housing substantially also accommodated within said recess;
wherein said septum is secured to said base element by said septum housing in such a way that a fluid transfer volume is formed in said at least one recess between an internal surface of said septum and an inner section of said recess in said base element, said fluid transfer volume communicating with said fluid communication means, wherein said septum, due to the selected resilient material and selected dimensions of said septum and said septum housing, is substantially mainly radially compressed in said septum housing in order to provide a fluid-tight seal between said septum and said septum housing, and for assisting in the fixing and fluid-sealing of said septum housing to said base element.
15 : Infusion device according to claim 14 , wherein said fluid transfer volume is accommodating cannula securing means.
16 : Infusion device according to claim 14 , wherein said septum housing is a tubular element accommodating said septum, at least one end of which tubular element forming a substantially partial enclosure over one surface of said septum.
17 : Infusion device according to claim 14 , wherein said septum housing includes an integrally formed cannula bushing.
18 : Infusion device according to claim 14 , wherein one of the surfaces of said septum is substantially exposed.
19 : Infusion device according to claim 14 , wherein said septum housing is fixed to said base element by welding.
20 : Infusion device according to claim 19 , wherein said septum housing is fixed to said base element by ultrasonic welding.
21 : Infusion device according to claim 14 , wherein said septum housing is fixed to said base element by a snap-lock.
22 : Infusion device according to claim 14 , wherein said septum housing is fluid-sealed by ultrasonic welding to said base element.
23 : Infusion device according to claim 14 , wherein said septum housing is fluid-sealed by a gasket arranged between said septum housing and said inner section of said recess.
24 : Infusion device according to claim 14 , wherein said septum is fixed inside said septum housing by friction.
25 : Infusion device according to claim 14 , wherein said septum is fixed inside said septum housing by welding.
26 : Infusion device according to claim 25 , wherein said septum is fixed inside said septum housing by ultrasonic welding.