Method of preventing short sampling of a capillary or wicking fill device
First Claim
Patent Images
1. A device for sampling a fluid, comprising:
- a pre-chamber having a first interior surface, a first volume and a first mesh material of a first mesh size, the pre-chamber being adapted to exert a first capillary force;
a sensing chamber in fluid communication with the pre-chamber, the sensing chamber having a second interior surface, a second volume and a second mesh material of a second mesh size that is smaller than the first mesh size, the sensing chamber being adapted to exert a second capillary force;
wherein the first volume is not less than the second volume, and wherein a differential exists between the first and second capillary forces, the differential being sufficient to cause flow of fluid from the pre-chamber to substantially fill the sensing chamber.
4 Assignments
0 Petitions
Accused Products
Abstract
The current invention provides a device, and a method for using the device, for ensuring that a capillary or wicking fill device is fully filled. In particular this invention is directed to, but not limited to, use with capillary or wicking action filled electrochemical sensors suitable for use in analyzing blood or interstitial fluids.
261 Citations
37 Claims
-
1. A device for sampling a fluid, comprising:
-
a pre-chamber having a first interior surface, a first volume and a first mesh material of a first mesh size, the pre-chamber being adapted to exert a first capillary force;
a sensing chamber in fluid communication with the pre-chamber, the sensing chamber having a second interior surface, a second volume and a second mesh material of a second mesh size that is smaller than the first mesh size, the sensing chamber being adapted to exert a second capillary force;
wherein the first volume is not less than the second volume, and wherein a differential exists between the first and second capillary forces, the differential being sufficient to cause flow of fluid from the pre-chamber to substantially fill the sensing chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
-
-
37. A device for sampling a fluid, comprising:
-
at least one pre-chamber having a first interior surface and a first volume, the pre-chamber being adapted to exert a first capillary force; and
a sensing chamber in fluid communication with the at least one pre-chamber, the sensing chamber having a second interior surface and a second volume, the sensing chamber being adapted to exert a second capillary force;
wherein the first volume is not less than the second volume, and wherein a differential exists between the first and second capillary forces, the differential being sufficient to cause flow of fluid from the at least one pre-chamber to substantially fill the sensing chamber, and wherein two or more chambers comprise two or more materials, which can be the same or different, selected from the group consisting of a mesh material, a fibrous filling material, and a powder.
-
Specification