Subcutaneous injection set for use with a reservoir that has a septum
First Claim
1. A medication infusion set comprising:
- a base tube having an exterior surface, a proximal end, a distal end, and an inner lumen extending between the proximal and distal ends, the base tube formed of a material selected from the group consisting of polyethylene and polypropylene;
a rigid cannula having a proximal end, a distal end, and a lumen extending between the proximal and distal ends, the cannula proximal end positioned in the base tube lumen; and
a tube of a heat shrinkable material positioned on the base tube exterior surface at least in a region of the base tube in which the cannula is inserted, the heat shrinkable tube having been heat shrunk to the exterior of the base tube and compressing the base tube and the cannula together to form a seal.
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0 Petitions
Accused Products
Abstract
An infusion set includes a needle hub with a needle to be inserted in a through passageway of the cannula housing through a sealing surface of a soft cannula. The infusion set includes a guide for centering the needle relative to the cannula sealing surface, a dirt trap, and the through passageway, as well as a locking device for locking the cannula housing and the needle hub together to prevent inadvertent disengagement. The guide includes co-operating guide pins and guide openings and a draft angle on the needle hub. The pins are located on each side of the needle and the through passageway. The connecting tube includes an inner tube of polyethylene and shrink fitted tubing at each end suitable for a solvent bonding layer. The composite can be reinforced with monofilament strands sandwiched between the two tubular layers to prevent kinking, or the inner tube can be formed in a triangular shape. The triangular shape composite is incased in a thin polyester shrink tube.
102 Citations
17 Claims
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1. A medication infusion set comprising:
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a base tube having an exterior surface, a proximal end, a distal end, and an inner lumen extending between the proximal and distal ends, the base tube formed of a material selected from the group consisting of polyethylene and polypropylene;
a rigid cannula having a proximal end, a distal end, and a lumen extending between the proximal and distal ends, the cannula proximal end positioned in the base tube lumen; and
a tube of a heat shrinkable material positioned on the base tube exterior surface at least in a region of the base tube in which the cannula is inserted, the heat shrinkable tube having been heat shrunk to the exterior of the base tube and compressing the base tube and the cannula together to form a seal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An infusion device comprising:
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a housing including a proximal end, a distal end, two lateral sides, and a bore extending between the proximal end and the distal end;
a soft cannula having a proximal end, a distal end, and a lumen extending between the proximal end and the distal end, the cannula positioned in part in the housing bore with the cannula distal end outside of the housing;
a locking device attached to a lateral side of the housing, the locking device including a locking finger and a lever, the lever extending distally and the locking finger extending proximally, the locking finger including a distally facing surface. - View Dependent Claims (8, 9, 10)
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11. A connecting device comprising:
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a hub including a proximal end face, a distal end face, two lateral sides, and a bore extending between the proximal end and the distal end;
a rigid cannula including a proximal end, a distal end, and a lumen extending between the proximal end and the distal end, the rigid cannula mounted in the hub bore with the rigid cannula distal end exterior of the hub;
a pin extending distally from the hub distal end face and offset laterally from the rigid cannula;
a proximally facing surface on one of the lateral sides positioned between the proximal end face and the distal end face. - View Dependent Claims (12, 13)
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14. A process of forming a medical infusion set, comprising the steps of:
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inserting an end of a rigid cannula into the lumen of a length of tubing;
heat shrinking a tube of heat shrinkable material over the portion of the tubing in which the end of the rigid cannula is positioned to compress the tubing onto the rigid cannula. - View Dependent Claims (15, 16, 17)
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Specification