Blood collection tube with surfactant
Improvements in blood collection and testing. In one aspect, an improved method of manufacturing a blood collection tube, particularly illustrated for use in sedimentation rate testing, including providing an elongated glass tube with an open first end for receiving a venipuncture blood sample of at least 1 ml, formed with a closed end opposite the first end; and applying to a substantial portion of the receptacle a containment barrier. The improvements also pertain to resulting blood collection tubes, additives for blood collection tubes that permit reliable sedimentation test data after 8 hours from the blood draw, and methods of administering health care using the aforenoted tubes, additives or both.
1. A method of managing the diagnosis and treatment of a condition, comprising the steps of:
a) coordinating the delivery of a blood sampling kit to at least one remote blood draw site, where blood samples are drawn from each of a plurality of persons directly into a tube corresponding to each person, wherein each tube has a containment barrier on the exterior of the tube and a surfactant inside of the tube;
b) performing an erythrocyte sedimentation rate (ESR) analysis on each of the plurality of blood samples located in the tubes at a remote site more than 6 hours after each sample is drawn;
c) receiving information at any site about the results of the ESR analysis of each blood sample; and
d) based on the results, coordinating administering a pharmacological therapy to a plurality of such persons whose blood sample indicates treatment is necessary.
2. The method of claim 1 , wherein the coordinating step (a) includes providing an elongated glass tube with an open first end for receiving a venipuncture blood sample of at least 1 ml, formed with a closed end opposite the first end.
3. The method of claim 2 , further comprising applying to a substantial portion of the glass tube a containment barrier that is sufficiently transparent that accurate and reproducible sedimentation rate tests are obtainable by an optical detection technique, and following a fracture of the tube, blood is contained within the tube.
4. The method of 3 , further comprising a step of evacuating the elongated glass tube to below atmospheric pressure and sealing the evacuated glass tube.
5. The method of claim 3 , further comprising a step of introducing into the tube, prior to introducing any blood, an additive including a surfactant and at least one additional additive selected from the group consisting of an anti-microbial, an anti-coagulant, a preservative, and any combination thereof.
6. The method of claim 5 , wherein the surfactant is a nonionic surfactant of the form C x E y , where C is an alkyl chain and E is a polyoxyethelyne chain, x is the number of carbons in the alkyl chain (C) and y is the number of ethyiene oxide units in the polyoxyethylene chain (E).
7. The method of claim 6 , wherein x is from about 6 to about 18 and y is from about 4 to about 40.
8. The method of claim 7 , wherein the surfactant is present in sufficient amount that it is capable of providing reproducible sedimentation rate tests, in a consistent and reproducible manner that approximates that of a fresh blood sample, after a delay of more than about 12 hours.
9. The method of claim 8 , further comprising refrigerating the blood sample before testing it.
10. The method of claim 9 , wherein the temperature of the sample is maintained between about 2 to about 10° C.
11. The method of claim 8 , further comprising maintaining the blood sample at ambient temperature before testing it.