Immunoassay apparatus and kit
First Claim
1. A biological sampling apparatus, comprising:
- a barrel defining a chamber having a first end and a narrow passageway at a second end opposite the first end;
an absorbent analytical test means located in the chamber; and
a frit having a first portion acting as a splash filter and located in said chamber, and a second portion integral with said first portion acting as a wick, said second portion extending through said narrow passageway, at least a portion of said splash filter being hydrophobic, and at least a portion of said wick being treated with a wetting agent to be hydrophilic.
2 Assignments
0 Petitions
Accused Products
Abstract
Biological sampling apparatus have a barrel defining a chamber with a narrow passageway at one end and an absorbent analytical test means in the chamber. In one embodiment, an integral frit is provided with a first portion acting as a splash filter and located in the chamber, and a second portion integral with said first portion acting as a wick. The second portion extends through the narrow passageway. A portion of the splash filter is hydrophobic, and at least a portion of the wick is treated with a wetting agent and is hydrophilic. In another embodiment, a splash filter is located in the chamber and a separate hydrophilic wick is provided having a first portion located in the narrow passageway and a second portion located outside the passageway and barrel. The second portion has a bulbous portion capable of absorbing substantially more fluid sample than the first portion.
39 Citations
22 Claims
-
1. A biological sampling apparatus, comprising:
-
a barrel defining a chamber having a first end and a narrow passageway at a second end opposite the first end; an absorbent analytical test means located in the chamber; and a frit having a first portion acting as a splash filter and located in said chamber, and a second portion integral with said first portion acting as a wick, said second portion extending through said narrow passageway, at least a portion of said splash filter being hydrophobic, and at least a portion of said wick being treated with a wetting agent to be hydrophilic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A biological sampling apparatus, comprising:
-
a barrel defining a chamber having a first end and a narrow passageway at a second end opposite the first end; an absorbent analytical test means located in the chamber; and a hydrophobic splash filter located in said chamber adjacent said narrow passageway; and a hydrophilic wick having a first portion located in said narrow passageway and a second portion located outside said passageway and outside said barrel, said second portion having a bulbous portion capable of absorbing substantially more fluid sample than said first portion. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
-
21. A biological sampling apparatus, comprising:
-
a barrel defining a chamber having a first end and a narrow passageway at a second end opposite the first end; an absorbent analytical test means located in the chamber; a hydrophilic wick extending through said narrow passageway; and an integral splash filter located in said chamber and in contact with said hydrophilic wick, wherein a first portion of said integral splash filter adjacent said wick is hydrophilic, and a second portion of said integral splash filter closest said test means is hydrophobic. - View Dependent Claims (22)
-
Specification