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 Prior to withdrawing bodily fluid into the one or more sample vessels for incubation, an initial volume of withdrawn bodily fluid is placed in one or more pre-sample reservoirs and is not used for the incubation in culture media.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. A method of using a sample procurement device for obtaining a blood sample from a patient with reduced contamination, the sample procurement device including a needle configured for insertion into the patient, and a junction, the method comprising:
inserting the needle into the vasculature of the patient;
receiving a first volume of blood from the patient while the sample procurement device is in a first state;
the sample procurement device configured to transition to a second state at the junction as a result of sequestration of an initial portion of the first volume of blood and to establish fluid communication between the needle and a sample vessel, the sample vessel containing culture media for facilitating growth of one or more types of microbes; and
receiving a second volume of blood into the sample vessel,
whereby sequestering the initial portion of the first volume of blood sequesters contaminants present in the first volume of blood, thereby reducing contamination that can lead to false positives in culture tests of the second volume of blood.
2. The method of claim 1 , wherein the initial portion of blood is less than 5 ml.
3. The method of claim 1 , wherein the initial portion of blood is sequestered in a reservoir.
4. The method of claim 3 , wherein the reservoir is a vacuum-sealed reservoir.
5. The method of claim 1 , wherein the needle is a first needle, the sample procurement device configured to be fluidically coupled to a second needle, the second needle being removably insertable into the sample vessel.
6. The method of claim 1 , wherein the contaminants are dermally-residing microbes.
7. A method of establishing a fluid flow path between a patient and a sample vessel using a sample procurement device, the sample procurement device including a needle configured for insertion into the patient, tubing configured to be fluidically coupled to the needle, and a diverter, the method comprising:
inserting the needle into the vasculature of the patient;
receiving a first volume of blood from the patient while the diverter is in a first state;
in response to blood flow from the patient stopping, automatically transitioning the diverter to a second state whereby an initial portion of the first volume of blood is sequestered and fluid communication is established between the needle and the tubing;
establishing fluid communication between the tubing and a sample vessel, the sample vessel containing culture media for facilitating growth of one or more types of microbes; and
receiving a second volume of blood into the sample vessel,
whereby sequestering the initial portion of blood sequesters contaminants present in the first volume of blood from the tubing, thereby reducing contamination that can lead to false positives in culture tests of the second volume of blood.
8. The method of claim 7 , wherein the initial portion of blood is less than 5 ml.
9. The method of claim 7 , wherein the initial portion of blood is sequestered in a reservoir.
10. The method of claim 9 , wherein the reservoir is integrated into the sample procurement device.
11. The method of claim 7 , wherein the needle is a first needle, the tubing configured to be fluidically coupled to a second needle, the second needle being removably insertable into the sample vessel.
12. The method of claim 7 , wherein the contaminants are dermally-residing microbes.
13. A method of establishing a fluid flow path between a patient and a sample vessel using a sample procurement device, the sample procurement device including a needle configured for insertion into the patient, and a flow controller configured to be fluidically coupled to the needle, the flow controller defining a first fluid flow path and a second fluid flow path, the method comprising:
inserting the needle into the vasculature of the patient;
establishing fluid communication between the needle and the first fluid flow path;
receiving a first volume of blood from the patient;
allowing the first volume of blood to flow to the first fluid flow path;
after pressure substantially equalizes, automatically sequestering the first volume of blood in at least the portion of the first fluid flow path;
establishing fluid communication between the needle and a sample vessel, the sample vessel containing culture media for facilitating growth of one or more types of microbes; and
allowing a second volume of blood to flow from the needle, through the second fluid flow path, and to the sample vessel,
whereby sequestering the first volume of blood sequesters contaminants present in the first volume of blood from the second fluid flow path, thereby reducing contamination that can lead to false positives in culture tests of the second volume of blood.
14. The method of claim 13 , wherein the contaminants are dermally-residing microbes.
15. The method of claim 13 , wherein the sample procurement device includes input tubing configured to fluidically couple the needle to the flow controller.
16. The method of claim 13 , wherein the sample procurement device includes output tubing configured to fluidically couple the second fluid flow path of the flow controller to the sample vessel.
17. The method of claim 13 , wherein the first volume of blood is less than 5 ml.
18. The method of claim 13 , wherein the first volume of blood is sequestered in a reservoir.
19. The method of claim 18 , wherein the reservoir is integrated into the sample procurement device.
20. The method of claim 1 , wherein the amount of blood in the second volume of blood is based on a size of the sample vessel.
21. The method of claim 1 , wherein the second volume of blood is approximately 2 ml to 10 ml of blood.
22. The method of claim 3 , wherein the blood stops flowing from the patient when a pressure in the needle and a pressure in the reservoir equalizes.
23. The method of claim 1 , wherein the second volume of blood is received into the sample vessel directly after the initial portion of the first volume of blood is sequestered.
24. The method of claim 7 , wherein the amount of blood in the second volume of blood is based on a size of the sample vessel.
25. The method of claim 7 , wherein the second volume of blood is approximately 2 ml to 10 ml of blood.
26. The method of claim 9 , wherein the blood stops flowing from the patient when a pressure in the needle and a pressure in the reservoir equalizes.
27. The method of claim 13 , wherein the amount of blood in the second volume of blood is based on a size of the sample vessel.
28. The method of claim 13 , wherein the second volume of blood is approximately 2 ml to 10 ml of blood.
29. The method of claim 18 , wherein the blood stops flowing from the patient when a pressure in the needle and a pressure in the first fluid flow path equalizes.
30. A method of using a sample procurement device for obtaining a blood sample from a patient with reduced contamination, the sample procurement device including a lumen-containing device configured to establish fluid communication with the patient, and a junction, the method comprising:
establishing fluid communication between the vasculature of the patient and the lumen-containing device;
receiving an initial flow of blood from the patient while the sample procurement device is in a first state;
the sample procurement device configured to transition to a second state at the junction as a result of sequestering an initial volume of blood and any contaminants present therein and to establish fluid communication between the lumen-containing device and a sample vessel, the sample vessel containing culture media for facilitating growth of one or more types of microbes; and
receiving approximately 2 ml to 10 ml of sample blood into the sample vessel.