Catheter head for subcutaneous administration of an substance
First Claim
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1. A catheter head for subcutaneous administration of a substance, comprising:
- a) a cannula housing carrying a cannula to be placed in tissue, and having a passage to said cannula for the substance, said cannula housing comprising an underside for flush positioning on a tissue surface, b) a needle holder including a feed line for conducting the substance and a connecting needle to be inserted into said passage of said cannula housing, wherein said needle holder and said cannula housing are coupled to each other, said needle holder forming a guide sleeve axially surrounding said connecting needle and being narrowly slide-guided over a cylindrical extension of said cannula housing, thereby sheathing both an inlet and a section of said passage of said cannula housing adjacent to said inlet, and c) guide means for positioning of said connecting needle and, during insertion of said connecting needle into said passage of said cannula housing, for guiding said needle holder at said cannula housing.
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Abstract
The present invention provides a catheter head including a cannula housing, a needle holder connectable to the cannula housing and a guide sleeve associated with the needle holder for positioning and guiding a connecting needle, and for being narrowly slide-guided over a portion of said cannula housing.
341 Citations
11 Claims
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1. A catheter head for subcutaneous administration of a substance, comprising:
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a) a cannula housing carrying a cannula to be placed in tissue, and having a passage to said cannula for the substance, said cannula housing comprising an underside for flush positioning on a tissue surface, b) a needle holder including a feed line for conducting the substance and a connecting needle to be inserted into said passage of said cannula housing, wherein said needle holder and said cannula housing are coupled to each other, said needle holder forming a guide sleeve axially surrounding said connecting needle and being narrowly slide-guided over a cylindrical extension of said cannula housing, thereby sheathing both an inlet and a section of said passage of said cannula housing adjacent to said inlet, and c) guide means for positioning of said connecting needle and, during insertion of said connecting needle into said passage of said cannula housing, for guiding said needle holder at said cannula housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A catheter head for subcutaneous administration of an active substance, comprising:
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a) a cannula housing comprising a cannula to be placed in tissue and a passage to said cannula being formed in said cannula housing, said cannula housing having an underside adapted for substantially flush positioning on a tissue surface and adapted for attachment to the tissue surface, b) a needle holder including a feed line for feeding the active substance and a connecting needle to be inserted into said passage of said cannula housing, wherein said needle holder and said cannula housing are connectable to each other, and c) guide means for positioning of said connecting needle and, during insertion of said connecting needle into said passage of said cannula housing, for guiding said needle holder at said cannula housing, wherein d) said needle holder forms a guide sleeve axially surrounding said connecting needle, said guide sleeve being narrowly slide-guided over a cylindrical extension of said cannula housing, sheathing both an inlet and a section of said passage of said cannula housing following said inlet.
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Specification