Sealing assembly for a fluid reservoir of a fluid infusion device
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61M-037/00
A61M-039/00
A61M-005/142
A61M-005/145
A61M-005/162
A61M-005/168
A61M-005/31
A61M-039/10
A61M-039/12
A61M-039/24
A61M-039/26
출원번호
US-0399857
(2012-02-17)
등록번호
US-9339639
(2016-05-17)
발명자
/ 주소
Halili, Edgardo C.
Lorenzen, Eric M.
Yavorsky, Matthew William
출원인 / 주소
Medtronic MiniMed, Inc.
대리인 / 주소
Ingrassia Fisher & Lorenz, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
194
초록▼
Disclosed herein is a fluid infusion device of the type that delivers medication fluid to the body of a patient. The device includes or cooperates with a fluid reservoir, and the device has a sealing assembly to receive and form a fluid seal with the fluid reservoir. A retractable sealing element su
Disclosed herein is a fluid infusion device of the type that delivers medication fluid to the body of a patient. The device includes or cooperates with a fluid reservoir, and the device has a sealing assembly to receive and form a fluid seal with the fluid reservoir. A retractable sealing element surrounding a hollow fluid delivery needle may be used to seal a port of the fluid reservoir. The port may include a pressure vent that is sealed by the retractable sealing element. In one variation, the reservoir includes a moving valve sleeve that holds a septum. The septum moves to allow the reservoir to vent, and to form a seal with the port when the needle pierces the septum. In another variation, the device includes a needleless sealing assembly. In yet other variations, the device uses a needled fluid reservoir.
대표청구항▼
1. A sealing assembly for a fluid infusion device, the sealing assembly comprising: a durable housing that receives and mates with a removable fluid reservoir having a fluid delivery port extending from the fluid reservoir and having a funnel-shaped interior defined therein, wherein the durable hous
1. A sealing assembly for a fluid infusion device, the sealing assembly comprising: a durable housing that receives and mates with a removable fluid reservoir having a fluid delivery port extending from the fluid reservoir and having a funnel-shaped interior defined therein, wherein the durable housing houses the removable fluid reservoir and retains the removable fluid reservoir in a particular position and orientation;a base plate having an adhesive layer of material to adhere the base plate to skin of a patient, and having a coupling structure to removably couple the base plate to the durable housing of the fluid infusion device;a reservoir port receptacle integrally formed with the base plate to receive and engage the fluid delivery port of the fluid reservoir in the particular position and orientation when the durable housing is coupled to the base plate, wherein the fluid delivery port of the fluid reservoir resides within the reservoir port receptacle when the durable housing is coupled to the base plate;a hollow fluid delivery needle coupled to the base plate and extending within the reservoir port receptacle to provide a fluid flow path from the fluid reservoir to a user of the fluid infusion device when the durable housing is coupled to the base plate; anda sealing element coupled to the base plate and overlying at least a portion of the hollow fluid delivery needle, the sealing element comprising: a base section;a tip section extending from the base section, the tip section shaped to enter and seal with the funnel-shaped interior of the fluid delivery port when the durable housing is coupled to the base plate;a retractable body section between the base section and the tip section;a needle cavity formed in the retractable body section and continuing through the base section to define a needle opening in the base section, the needle cavity sized to receive the hollow fluid delivery needle; anda self-sealing slit formed in the tip section to accommodate the hollow fluid delivery needle when the sealing element is in a retracted position caused by coupling of the durable housing with the base plate. 2. The sealing assembly of claim 1, wherein the sealing element further comprises a guide channel formed in the tip section and communicating with the needle cavity and the self-sealing slit, wherein the guide channel leads a tip of the hollow fluid delivery needle into the self-sealing slit during retraction of the sealing element caused by coupling of the durable housing with the base plate. 3. The sealing assembly of claim 1, wherein: the needle cavity defines internal relief features of the retractable body section;the internal relief features facilitate refraction of the sealing element over the hollow fluid delivery needle in response to a longitudinal force applied to the tip section by the fluid delivery port of the fluid reservoir, the longitudinal force caused by coupling of the durable housing with the base plate; andthe internal relief features cause the sealing element to extend over and cover the hollow fluid delivery needle in response to removal of the longitudinal force. 4. The sealing assembly of claim 3, wherein the internal relief features comprise an accordion structure within the needle cavity. 5. The sealing assembly of claim 3, wherein the internal relief features comprise a plurality of internal annular channels within the needle cavity. 6. The sealing assembly of claim 3, wherein the internal relief features comprise a plurality of internal annular ridges within the needle cavity. 7. The sealing assembly of claim 3, wherein the internal relief features comprise a plurality of bottleneck structures within the needle cavity. 8. The sealing assembly of claim 1, wherein: the sealing element has a nominal state and a refracted state caused by coupling of the durable housing with the base plate;when in the nominal state, a tip of the hollow fluid delivery needle resides within the needle cavity, and the self-sealing slit forms a fluid seal to inhibit fluid ingress into the needle cavity; andwhen in the retracted state, an end section of the hollow fluid delivery needle resides in the self-sealing slit, and the tip of the hollow fluid delivery needle extends from the tip section of the sealing element. 9. The sealing assembly of claim 8, wherein: the retractable body section expands when the sealing element is retracting; andthe retractable body section forms a fluid seal with the funnel-shaped interior of the fluid delivery port when the sealing element is in the retracted state. 10. The sealing assembly of claim 1, further comprising a circumferential compression element coupled around the tip section to impart an inward biasing force to the self-sealing slit. 11. The sealing assembly of claim 10, wherein the circumferential compression element comprises a rigid ring. 12. The sealing assembly of claim 10, wherein the circumferential compression element comprises a resilient band. 13. A sealing assembly for a fluid infusion device, the sealing assembly comprising: a durable housing that receives and mates with a removable fluid reservoir having a fluid delivery port extending from the fluid reservoir and having a funnel-shaped interior defined therein, wherein the durable housing houses the removable fluid reservoir and retains the removable fluid reservoir in a particular position and orientation;a base plate having an adhesive layer of material to adhere the base plate to skin of a patient, and having a coupling structure to removably couple the base plate to the durable housing of the fluid infusion device;a reservoir port receptacle integrally formed with the base plate to receive and engage the fluid delivery port of the fluid reservoir in the particular position and orientation when the durable housing is coupled to the base plate, wherein the fluid delivery port of the fluid reservoir resides within the reservoir port receptacle when the durable housing is coupled to the base plate;a hollow fluid delivery needle coupled to the base plate and extending within the reservoir port receptacle to provide a fluid flow path from the fluid reservoir to a user of the fluid infusion device when the durable housing is coupled to the base plate; anda sealing element coupled to the base plate and overlying at least a portion of the hollow fluid delivery needle, the sealing element comprising: a base section;a tip section extending from the base section, the tip section shaped to enter and seal with the funnel-shaped interior of the fluid delivery port when the durable housing is coupled to the base plate;a retractable body section between the base section and the tip section; anda needle cavity formed in the retractable body section and continuing through the base section to define a needle opening in the base section, the needle cavity sized to receive the hollow fluid delivery needle, and the needle cavity defining internal relief features of the retractable body section; wherein:the internal relief features promote deformation of the sealing element and retraction of the sealing element over the hollow fluid delivery needle in response to a longitudinal force applied to the tip section of the sealing element by the funnel-shaped interior of the fluid delivery port, the longitudinal force caused by coupling of the durable housing with the base plate; andthe internal relief features cause the sealing element to automatically extend over the hollow fluid delivery needle into a nominal state in response to removal of the longitudinal force. 14. The sealing assembly of claim 13, wherein the sealing element encloses the hollow fluid delivery needle when the sealing element is in the nominal state. 15. The sealing assembly of claim 13, wherein the sealing element further comprises a self-sealing slit formed in the tip section to accommodate the hollow fluid delivery needle when the sealing element is in a retracted state caused by coupling of the durable housing with the base plate. 16. The sealing assembly of claim 15, wherein the sealing element further comprises a guide channel formed in the tip section and communicating with the needle cavity and the self-sealing slit, wherein the guide channel leads a tip of the hollow fluid delivery needle into the self-sealing slit during retraction of the sealing element caused by coupling of the durable housing with the base plate. 17. The sealing assembly of claim 13, wherein the internal relief features comprise an accordion structure within the needle cavity. 18. The sealing assembly of claim 13, wherein the internal relief features comprise a plurality of internal annular channels within the needle cavity. 19. The sealing assembly of claim 13, wherein the internal relief features comprise a plurality of internal annular ridges within the needle cavity. 20. The sealing assembly of claim 13, wherein the internal relief features comprise a plurality of bottleneck structures within the needle cavity. 21. The sealing assembly of claim 13, wherein: the retractable body section comprises an exterior surface;the exterior surface moves outward when the sealing element is retracting; andthe exterior surface forms a fluid seal with the funnel-shaped interior of the fluid delivery port when the sealing element is retracted.
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