Methods and devices for sample collection and stabilization
Methods and devices are provided for sample collection. In one example, a device is provided comprising at least one capillary tube or collection channel directed to a sample vessel, wherein in a one-step removal step of detaching the sample vessel from the collection channel, a vacuum force is created within the sample vessel, due in part of the pulling of the sealed vessel away from the device, wherein this vacuum force draw out residual sample that may still be resident in the collection channel.
1. A device comprising:
at least one capillary tube;
a nozzle located at a proximal end of the capillary tube;
at least one collection vessel with a self-healing cap, wherein the vessel is configured to go from a vented, to an unvented, and then to a sealed configuration as the nozzle is removed from the vessel;
at least one structure on an outer surface of the nozzle such that a vent opens in the cap of the collection vessel when said cap slides over the at least one structure thereby creating the vented configuration, wherein the at least one structure is a protrusion, an indentation, a rib, a channel, a groove, or a bump,
wherein during nozzle removal, when the vessel is in the sealed configuration, continued pulling of the vessel away from the device provides for a vacuum force to be created within the sample vessel such that the continued pulling of the sealed vessel away from the device provides for residual sample resident in the capillary tube to be drawn out of the nozzle and into the collection vessel.
2. The device of claim 1 wherein a suction effect is created by the nozzle forming a seal with the self-healing cap.
3. The device of claim 1 wherein other embodiments may use other techniques to create this non-vented state.
4. The device of claim 1 wherein the at least one collection vessel is transparent.
5. The device of claim 1 wherein the at least one collection vessel is translucent.
6. The device of claim 1 wherein the at least one collection vessel comprises an optically transmissive material.
7. The device of claim 1 wherein the at least one collection vessel has an interior coated with an anticoagulant.
8. The device of claim 1 wherein said at least one capillary tube is coated with an anticoagulant.
9. The device of claim 1 wherein a capillary channel is coated with an anticoagulant.
10. A method for using a sample collection device having a collection vessel, the method comprising:
pushing the collection vessel forward towards a distal end of the device to create relative motion that moves a nozzle of the device through a self-healing cap of the vessel, wherein the vessel is configured to go from a vented, to an unvented, and then to a sealed configuration as the nozzle is removed from said vessel such that a vent opens in the cap of the collection vessel when said cap slides over at least one structure on an outer surface of the nozzle thereby creating the vented configuration, wherein the at least one structure is a protrusion, an indentation, a rib, a channel, a groove, or a bump;
using a one-step motion to remove the collection vessel from the sample collection device wherein the motion to remove the collection vessel from the sample collection device provides a vacuum force to be created within the sample vessel which provides for a residual sample resident in a capillary tube of the sample collection device to be drawn out of the nozzle and into the collection vessel.
11. A sample collection device comprising:
at least one sample collection channel;
a nozzle located at a proximal end of the at least one sample collection channel;
at least one collection vessel having a self-healing cap wherein said collection vessel is configured to go from a vent, to an unvented, and then to a sealed configuration as the vessel is moved along a path to disengage from the sample collection channel such that a vent opens in the cap of the collection vessel when said cap slides over at least one structure on an outer surface of the nozzle thereby creating the vented configuration, wherein the at least one structure is a protrusion, an indentation, a rib, a channel, a groove, or a bump.