Blood sampling device and method
First Claim
Patent Images
1. In a disposable blood sampling device particularly for removing a small volume of blood from the epidermis of the body for testing purposes:
- a. a housing comprising inner and outer, spaced apart, walls separated by an axially compressible, axially extending bridging enclosure;
b. said outer wall carrying an axially extending, evacuated, collecting container housed within said axially compressible enclosure and having an open end closed by a penetrable end member;
c. a double-ended cannula device axially slidably carried by said inner wall in axial alignment with said end member, and having an end member-penetrating end and a skin-penetrating end;
d. said inner wall having a cannula device passing portion in axial alignment with said cannula device for passing the skin-penetrating end through the inner wall into the epidermis; and
e. means for preventing said cannula device from penetrating the end member of the collecting container when the inner and outer walls are relatively axially compressed, until after penetration of the epidermis by the cannula device.
1 Assignment
0 Petitions
Accused Products
Abstract
A disposable blood sampling device wherein inner and outer spaced apart pad members, separated by a compressible pad-bridging enclosure respectively carry an axially extending evacuated collecting container closed by a penetrable end cap and an axially aligned, double-ended cannula. In normal position the cannula is maintained in withdrawn position within the enclosure. The cannula is prevented from penetrating the cap of the collecting tube when the outer member is depressed toward the inner member until after penetration of the epidermis has occurred.
266 Citations
14 Claims
-
1. In a disposable blood sampling device particularly for removing a small volume of blood from the epidermis of the body for testing purposes:
-
a. a housing comprising inner and outer, spaced apart, walls separated by an axially compressible, axially extending bridging enclosure; b. said outer wall carrying an axially extending, evacuated, collecting container housed within said axially compressible enclosure and having an open end closed by a penetrable end member; c. a double-ended cannula device axially slidably carried by said inner wall in axial alignment with said end member, and having an end member-penetrating end and a skin-penetrating end; d. said inner wall having a cannula device passing portion in axial alignment with said cannula device for passing the skin-penetrating end through the inner wall into the epidermis; and e. means for preventing said cannula device from penetrating the end member of the collecting container when the inner and outer walls are relatively axially compressed, until after penetration of the epidermis by the cannula device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method of operating a disposable blood sampling device having inner and outer spaced apart wall surfaces separated by an axially compressible, axially extending wall surface-bridging enclosure to form a housing;
- the outer wall surface carrying an axially extending evacuating collecting tube closed by a penetrable tube end member;
a double-ended cannula device axially slidably carried by the inner wall surface in axial alignment with the end member and having an end member-penetrating end and a skin-penetrating end;
the inner wall surface having a portion in axial alignment with the cannula device for passing the skin-penetrating end through the inner wall surface into the epidermis; and
means for causing the cannula device to penetrate the epidermis prior to penetrating the end member of the collecting tube when the inner and outer wall surfaces are relatively axially compressed comprising the steps of;a. axially moving the outer wall surface toward the inner wall surface to a predetermined extent to cause the collecting tube to force the skin penetrating end of the cannula device to pass through the inner wall surface and penetrate the epidermis; b. then engaging the cannula device to halt the movement of the cannula device into the epidermis despite further movement of the outer wall surface toward the inner wall surface and continuing the movement of the outer wall surface toward the inner wall surface to puncture the collecting tube end member; and c. withdrawing the blood into the evacuated collecting tube via the suction forces in the tube. - View Dependent Claims (13, 14)
- the outer wall surface carrying an axially extending evacuating collecting tube closed by a penetrable tube end member;
Specification