Sample collection and dispensing device

Patent metadata

Field	Value
Publication number	US-12168225-B2
Application number	US-201917295195-A
Country	US
Kind code	B2
Filing date	Aug 21, 2019
Priority date	Nov 21, 2018
Publication date	Dec 17, 2024
Grant date	Dec 17, 2024

Abstract

Embodiments in accordance with the present disclosure are directed to sample collecting and dispensing methods and apparatuses. An example apparatus includes a capillary sampler disposed on a device first end, wherein the capillary sampler is configured to collect a fluid sample via an opening and a capillary body. The apparatus further includes a reagents chamber in fluid communication with the capillary sampler, and a barrier assembly disposed between the capillary sampler and the reagents chamber, wherein the barrier assembly is configured to separate fluid in the reagents chamber from the capillary sampler. A plunger assembly disposed on a device second end opposite the device first end, may modify the barrier assembly to dispense the fluid from the reagents chamber to the capillary sampler responsive to application of a force in the direction of the device first end.

First claim

What is claimed is:

1. A sample collecting and dispensing apparatus comprising:
a capillary sampler disposed on a first end of the sample collecting and dispensing apparatus, wherein the capillary sampler is configured to collect a fluid sample via an opening and a capillary body;
a reagents chamber in fluid communication with the capillary sampler;
a barrier assembly disposed between the capillary sampler and the reagents chamber, wherein the barrier assembly is configured to separate fluid in the reagents chamber from the capillary sampler;
a plunger assembly disposed on a second end of the sample collecting and dispensing apparatus. the second end being opposite the first end, wherein the plunger assembly is configured to modify the barrier assembly to dispense the fluid from the reagents chamber to the capillary sampler responsive to application of a force in the direction of the first end;
a venting barrier disposed in the capillary body; and
a liquid barrier including a deformable ball configured to displace into a cavity of the capillary body in response to pressure within the reagents chamber being at or above a threshold level of pressure,
wherein the venting barrier is configured to prevent the deformable ball of the liquid harrier from passing beyond the cavity of the capillary body and to permit passage of the fluid from the reagents chamber into the capillary sampler.

2. The sample collecting and dispensing apparatus of claim 1 , wherein an internal surface of the capillary body and an internal surface of the opening of the capillary sampler are coated with a hydrophilic material.

3. The sample collecting and dispensing apparatus of claim 1 , wherein the venting barrier includes sintered polyethylene grains.

4. The sample collecting and dispensing apparatus of claim 1 , wherein the liquid barrier is configured to:
maintain the fluid in the reagents chamber in response to pressure within the reagents chamber being below a threshold level of pressure; and
permit passage of fluid from the reagents chamber to the capillary sampler in response to pressure within the reagents chamber being at or above the threshold level of pressure.

5. The sample collecting and dispensing apparatus of claim 1 , wherein the barrier assembly further includes:
the venting barrier;
the liquid barrier including the deformable ball; and
a pedestal disposed in the capillary body and configured to prevent the deformable ball of the liquid barrier from passing beyond a particular point within the capillary body and to permit passage of the fluid from the reagents chamber into the capillary sampler.

6. The sample collecting and dispensing apparatus of claim 1 , wherein the venting barrier is disposed in the capillary body and in a venting aperture defined by a side wall of the capillary body.

7. The sample collecting and dispensing apparatus of claim 6 , wherein the venting barrier is configured to:
limit a volume of the fluid sample collected in the capillary body in response to pressure within the reagents chamber being below a threshold level of pressure; and
permit passage of fluid from the reagents chamber to the capillary sampler in response to pressure within the reagents chamber being at or above the threshold level of pressure.

8. The sample collecting and dispensing apparatus of claim 6 , wherein the venting barrier is configured to permit air to exit the capillary body via the venting aperture in the side wall of the capillary body responsive to collection of the fluid sample via the opening.

9. A sample collecting and dispensing apparatus comprising: a capillary sampler disposed on a first end of the sample collecting and dispensing apparatus, wherein the capillary sampler is configured to collect and dispense a fluid sample via an opening and a capillary body;
a reagents chamber storing a fluid reagent specific to the fluid sample to be collected, wherein the reagents chamber includes a reagents chamber distal end attached to and in fluid communication with the capillary sampler and a reagents chamber proximal end;
a liquid barrier disposed on the reagents chamber distal end configured to prevent the fluid reagent from passing from the reagents chamber to the capillary sampler under atmospheric pressures; and
a plunger assembly including a handle and a plunger rod disposed on a second end of the sample collecting and dispensing apparatus, wherein the plunger assembly is adjacently connected to the reagents chamber proximal end through mated threads, and wherein the plunger rod is configured to translate distally along the reagents chamber to decrease a volume of the fluid reagent in the reagents chamber and permit the fluid reagent to release from the reagents chamber,
wherein the reagents chamber further includes mating features disposed on an external surface of the reagents chamber and configured to translate distally along mated threads disposed on an inside surface of the handle.

10. The sample collecting and dispensing apparatus of claim 9 , wherein the liquid barrier includes an elastomeric cord.

11. The sample collecting and dispensing apparatus of claim 9 , wherein the handle further includes an indicator configured to provide a visual indication in response to the volume of the fluid reagent in the reagents chamber being fully dispensed.

12. The sample collecting and dispensing apparatus of claim 9 , wherein the handle of the plunger assembly further includes mating features disposed on an internal surface of the handle and configured to translate distally along mated threads disposed on an external surface of the reagents chamber.

13. The sample collecting and dispensing apparatus of claim 9 , wherein the capillary sampler is configured to dispense the fluid sample and the fluid reagent to a corresponding test device responsive to translation of the plunger rod distally along the reagents chamber.

14. The sample collecting and dispensing apparatus of claim 9 , further including coupling features disposed on an exterior surface of the apparatus for coupling the apparatus to a corresponding test device.

15. The sample collecting and dispensing apparatus of claim 14 , wherein the coupling features are configured to lock in a fixed position responsive to coupling of the apparatus to the corresponding test device.

16. A method of sample collecting and dispensing, comprising:
collecting a fluid sample by capillary force through an opening in a capillary sampler disposed on a first end of a sample collecting and dispensing apparatus, wherein a volume of the fluid sample is limited by a barrier assembly disposed within the capillary sampler;
coupling the sample collecting and dispensing apparatus to a receiving port of a corresponding testing apparatus;
responsive to application of a force on a plunger assembly disposed on a second end of the sample collecting and dispensing apparatus opposite the first end of the sample collecting and dispensing apparatus, modifying the barrier assembly to dispense fluid from a reagents chamber in fluid communication with the capillary sampler, and dispensing the fluid from the reagents chamber and the fluid sample from the as opening in a capillary sampler, and
modifying the barrier assembly by increasing pressure in the reagents chamber and dislodging a deformable ball from a location proximal to the capillary sampler.

Assignees

• Stanford Res Inst Int

Inventors

• Mendoza Estevan
• Warner Eric

Classifications

• G01N2001/149

  Capillaries; Sponges · CPC title

• G01N1/14

  Suction devices, e.g. pumps; Ejector devices · CPC title

• B01L2400/0487

  fluid pressure, pneumatics · CPC title

• B01L2400/0406

  capillary forces · CPC title

• B01L2300/161

  Control and use of surface tension forces, e.g. hydrophobic, hydrophilic · CPC title