Self-healing diaphragm in a subcutaneous infusion port
First Claim
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1. A subcutaneous infusion port for peritoneal dialysis, comprising:
- (a) a housing forming an inner chamber and including(i) a vertically extending side wall disposed about the chamber, the side wall having a first and a second axially spaced ends and inside and outside side walls, the side wall forming a generally cylindrical chamber;
(ii) an entry port into the chamber located at the second end of the side wall;
(iii) a bottom solid wall axially disposed at the first end of the side wall;
(iv) an attaching means disposed at the first end of the side wall for fixing the housing to a patient;
(b) a replaceable self-sealing, self-healing, needle penetrable diaphragm axially located near the second end of the sidewall for sealing the entry port and for maintaining the sealed inner chamber, the diaphragm comprising;
(i) a bottom layer constructed of a material having properties of being inert, impermeable to fluid and preventing tissue in-growth and the bottom layer facing the bottom solid wall;
(ii) a layer above the bottom layer and laminated to the bottom layer, the layer above the bottom layer constructed of a material having properties that promote tissue in-growth;
(c) a removable sealing means in contact with both the side wall and the diaphragm in order to securely hold the diaphragm to the housing and to provide a leak resistant seal between the diaphragm and housing;
(d) a conduit for attaching to a standard dialysis catheter, wherein said conduit extends out from the outside side wall and is located near the first end of the side wall, the conduit having a fluid entry port which is in alignment with the conduit and which interconnects with the inner chamber for a fluid flow passage.
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Abstract
A subcutaneous infusion port comprising a three-piece removable unit including a self-sealing, needle penetrable diaphragm having a composite membrane comprising a bottom layer that has the properties of being inert, being impermeable to fluid and preventing tissue in-growth and a middle layer laminated to the bottom layer that has the properties of promoting tissue in-growth into the middle layer.
159 Citations
9 Claims
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1. A subcutaneous infusion port for peritoneal dialysis, comprising:
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(a) a housing forming an inner chamber and including (i) a vertically extending side wall disposed about the chamber, the side wall having a first and a second axially spaced ends and inside and outside side walls, the side wall forming a generally cylindrical chamber; (ii) an entry port into the chamber located at the second end of the side wall; (iii) a bottom solid wall axially disposed at the first end of the side wall; (iv) an attaching means disposed at the first end of the side wall for fixing the housing to a patient; (b) a replaceable self-sealing, self-healing, needle penetrable diaphragm axially located near the second end of the sidewall for sealing the entry port and for maintaining the sealed inner chamber, the diaphragm comprising; (i) a bottom layer constructed of a material having properties of being inert, impermeable to fluid and preventing tissue in-growth and the bottom layer facing the bottom solid wall; (ii) a layer above the bottom layer and laminated to the bottom layer, the layer above the bottom layer constructed of a material having properties that promote tissue in-growth; (c) a removable sealing means in contact with both the side wall and the diaphragm in order to securely hold the diaphragm to the housing and to provide a leak resistant seal between the diaphragm and housing; (d) a conduit for attaching to a standard dialysis catheter, wherein said conduit extends out from the outside side wall and is located near the first end of the side wall, the conduit having a fluid entry port which is in alignment with the conduit and which interconnects with the inner chamber for a fluid flow passage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification