Systems and methods for parenterally procuring bodily-fluid samples with reduced contamination
The present invention is directed to the parenteral procurement of bodily-fluid samples. The present invention is also directed to systems and methods for parenterally procuring bodily-fluid samples with reduced contamination from dermally-residing microbes. In some embodiments, a bodily-fluid withdrawing system is used to withdraw bodily fluid from a patient for incubation in culture media in one or more sample vessels. Prior to withdrawing bodily fluid into the one or more sample vessels for incubation, an initial volume of withdrawn bodily fluid is placed in one or more pre-sample reservoirs and is not used for the incubation in culture media.
1. An apparatus for obtaining a blood sample with reduced contamination from a patient, the apparatus comprising:
an input tube configured to be fluidically coupled to the patient; and
a diverter including a reservoir and a junction configured to control fluid flow from the patient, the junction including an inlet fluidically coupled to the input tube, a first outlet fluidically coupled to the reservoir, and a second outlet configured to be fluidically coupled to a sample vessel containing a culture media,
the junction configured to (a) allow an initial volume of blood to flow from the patient to the reservoir, and (b) transition without manual intervention as a direct result of filling the reservoir to allow a subsequent volume of blood from the patient to flow away from the reservoir, thereby bypassing the initial volume of blood sequestered in the reservoir.
2. The apparatus of claim 1 , whereby sequestering the initial volume of blood sequesters contaminants present in the initial volume of blood, thereby reducing contamination in the blood used as the blood sample in the culture testing.
3. The apparatus of claim 1 , wherein the initial volume of blood is less than 5 ml.
4. The apparatus of claim 1 , wherein the diverter is configured to transition at the junction from a first state to a second state, the first state operable to allow the initial volume of blood to flow into the reservoir, the second state operable to (a) sequester the initial volume of blood in the reservoir, and (b) establish fluid communication between the input tube and the second outlet.
5. The apparatus of claim 1 , wherein the reservoir is integrated into the diverter.
6. The apparatus of claims 1 , wherein all of the initial volume of blood from the patient flows into the reservoir.
7. The apparatus of claim 1 , wherein the initial volume of blood is fluidically isolated in the reservoir.
8. An apparatus for obtaining a blood sample with reduced contamination from a patient, the apparatus comprising:
a needle having a lumen configured for insertion into the patient;
an input tube configured to be fluidically coupled to the needle;
a reservoir configured to receive and sequester an initial volume of blood withdrawn from the patient; and
a junction including an inlet fluidically coupled to the input tube and a first outlet fluidically coupled to the reservoir, the input tube, at least a portion of the junction, and the reservoir collectively defining a first fluid flow path that allows the initial volume of blood to flow from the needle to the reservoir,
the junction configured to be fluidically coupled to a sample vessel containing a culture media via a second outlet, the input tube and the junction defining a second fluid flow path that allows a subsequent volume of blood to bypass the initial volume of blood sequestered in the reservoir, the junction configured to transition without manual intervention as a direct result of filling the reservoir to divert the subsequent volume of blood toward the second fluid flow path,
whereby sequestering the initial volume of blood in the reservoir sequesters contaminants present in the initial volume of blood thereby reducing contamination of the blood flowing away from the reservoir.
9. The apparatus of claim 8 , whereby filling the reservoir sequesters the initial volume of blood in the reservoir.
10. The apparatus of claim 8 , wherein the junction has a first state operable to allow the initial volume of blood to flow into the reservoir and a second state operable to direct the subsequent volume of blood away from the reservoir, thereby bypassing the initial volume of blood sequestered in the reservoir.
11. The apparatus of claim 8 , wherein the junction is configured to transition from a first state to a second state as a result of at least a portion of the initial volume of blood filling the reservoir.
12. The apparatus of claim 8 , wherein the subsequent volume of blood is substantially free of microbial artifacts.
13. The apparatus of claim 8 , wherein the initial volume of blood is less than 5 ml.
14. The apparatus of claim 8 , wherein the initial volume of blood is greater than the volume of the lumen of the needle and less than 5 ml.
15. The apparatus of claims 8 , wherein all of the initial volume of blood from the patient flows into the reservoir.
16. The apparatus of claim 8 , wherein the initial volume of blood is fluidically isolated in the reservoir.
17. An apparatus for obtaining a blood sample with reduced contamination from a patient, the apparatus comprising:
an input tube configured to be fluidically coupled to the patient;
a reservoir configured to receive an initial volume of blood withdrawn from the patient; and
a diverter fluidically coupled to the input tube, the diverter configured to allow the initial volume of blood withdrawn from the patient to flow to the reservoir and to sequester the initial volume of blood in the reservoir, the diverter further configured to transition without manual intervention as a direct result of filling the reservoir to divert a subsequent volume of blood toward an outlet,
whereby sequestering the initial volume of blood in the reservoir sequesters contaminants present in the initial volume of blood thereby reducing contamination of the blood diverted toward an outlet.
18. The apparatus of claim 17 , wherein the initial volume of blood is less than 5 ml.
19. The apparatus of claim 17 , wherein the diverter is configured to transition from a first state to a second state, the first state operable to allow the initial volume of blood to flow into the reservoir, the second state operable to (a) sequester the initial volume of blood in the reservoir, and (b) direct the subsequent volume of blood from the patient away from the reservoir.
20. The apparatus of claim 19 , wherein the diverter is further configured to establish fluid communication between the input tube and the outlet in the second state.
21. The apparatus of claim 17 , wherein the reservoir is integrated into the diverter.
22. The apparatus of claims 17 , wherein all of the initial volume of blood from the patient flows into the reservoir.
23. The apparatus of claim 17 , wherein the initial volume of blood is fluidically isolated in the reservoir.
24. An apparatus for obtaining a blood sample with reduced contamination from a patient, the apparatus comprising:
a reservoir configured to receive an initial volume of blood withdrawn from the patient; and
a housing having an inlet, a first outlet and a second outlet, the inlet configured to be fluidically coupled to the patient and the first outlet fluidically coupled to the reservoir,
the housing configured to (a) direct the initial volume of blood from the patient to the reservoir, and (b) transition without manual intervention as a direct result of filling the reservoir to allow a subsequent volume of blood from the patient to flow away from the reservoir, thereby bypassing the initial volume of blood sequestered in the reservoir,
whereby sequestering the initial volume of blood in the reservoir sequesters contaminants present in the initial volume of blood thereby reducing contamination of the blood flowing away from the reservoir.
25. The apparatus of claim 24 , wherein the housing is configured to direct the initial volume of blood to towards the first outlet.
26. The apparatus of claim 25 , wherein the housing is configured to direct the subsequent volume of blood away from the reservoir via the second outlet.
27. The apparatus of claim 24 , wherein the initial volume of blood is less than 5 ml.
28. The apparatus of claim 24 , wherein the reservoir is integrated into the housing.
29. The apparatus of claim 24 , wherein all of the initial volume of blood from the patient flows into the reservoir.
30. The apparatus of claim 24 , wherein the initial volume of blood is fluidically isolated in the reservoir.