Title:
TEST TUBE FOR MEASURING ERYTHROCYTE SEDIMENTATION RATE
Document Type and Number:
Japanese Patent JP3103308
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To realize quick and accurate measurement of erythrocyte sedimentation rate(ESR) by forming a blood column in a test tube for measuring ESR and specifying the length of tubular wall part where an anticoagulant limits the air gap and the inside diameter of tube within a specified range.
SOLUTION: An anticoagulant is sucked and mixed quickly with a blood sample using a small diameter vacuum blood sampling tube filed with the anticoagulant. Consequently, the effect of anticoagulant is exhibited to the maximum and erythrocytes are suspended uniformly, as a whole, in a test tube T prior to ESR inspection. The test tube T is provided with a function for preventing an additive/anticoagulant from interfering with hemotological parameters. For that purpose, surface tension of blood sample is reduced with respect to a glass test tube T which is added with a surfactant for mixing contents quickly. The test tube T has tubular wall part and the length thereof is set in the range of 80-120mm while the inside diameter is set in the range of 5-7mm. The surfactant has radiation stability and a nonionic buffer trisodium citrate, for example, which allows the test tube T to be sterilized with cobalt 60.
Inventors:
Christopher Dufrannes
Georges Bonneville
Jean Eman
Robert Es. Gorabek Jr.
Georges Bonneville
Jean Eman
Robert Es. Gorabek Jr.
Application Number:
JP19256596A
Publication Date:
October 30, 2000
Filing Date:
July 22, 1996
Export Citation:
Assignee:
BECTON, DICKINSON AND COMPANY
International Classes:
B01L3/14; B01L9/06; G01N33/48; G01N33/49; (IPC1-7): G01N33/49; G01N33/48
Domestic Patent References:
| JP60153843A | ||||
| JP63115058A | ||||
| JP3144364A |
Other References:
【文献】米国特許4474056(US,A)
Attorney, Agent or Firm:
Yoshikazu Tani (1 person outside)