Controlled transfer biological sample collection devices and methods of using such devices
The field of the present invention pertains to a controlled transfer biological collection device using a dry solid storage and transfer medium and a method for the collection of biological material of interest (genetic or proteinaceous material) in a form suitable for storage and/or subsequent analysis. Specifically, the present invention provides for a sampling device that controls the transfer of the biological sample to the storage medium by holding the storage medium and a moveable sample collection member having an analyte collection surface. The invention further provides for a method not only for storing a biological analyte on this collection device but also for analyzing the stored biological analyte using methods that are suited for automated analyzing systems.
1. A method for collecting a biological sample that contains degradable biologically sourced analytes comprising:
a) obtaining a device comprised of
i) a sample collection member having an analyte collection surface in the form of a pad of material mounted to an elongated stem that extends in a longitudinal direction;
ii) a sample storage medium wherein the sample storage medium comprises at least one stabilizing reagent that preserves at least one biological sample analyte for transport or storage; and
iii) a storage medium holder having one or more retention arms and a means for pressing the pad onto the sample storage medium, for transfer of at least a portion of the biological sample onto the sample storage medium,
iv) wherein the sample collection member is configured to be moveable between at least two positions including a first position in which the pad of material is spaced from the sample storage medium in the longitudinal direction and a second position where the pad of material is in contact with the sample storage medium,
v) wherein the sample storage medium is slidably insertable into the storage medium holder in a direction generally parallel to an interface formed between the pad of material and the sample storage medium when the pad of material is in the second position, and
vi) wherein the one or more retention arms are configured to removably hold the sample storage medium in a position by exerting a force on the sample storage medium;
b) collecting a biological sample on the pad;
c) moving the sample collection member between at least two positions, including the first position and the second position, while the one or more retention arms hold the sample storage medium in position
d) operating the storage medium holder to press the pad onto the sample storage medium;
e) releasing the pad from the sample storage medium; and
f) removing the sample storage medium from the storage medium holder.
2. The method of claim 1 , wherein the method includes providing a visual delineation at an area of the sample storage medium where transfer of the sample takes place.
3. The method of claim 1 , wherein the means for pressing the pad onto the sample storage medium provides a reproducible pressure between the pad and the sample storage medium during the step of operating the storage medium holder to press the pad onto the sample storage medium and before the step of releasing the pad from the sample storage medium.
4. A device for collecting a biological sample that contains degradable biologically sourced analytes, the device comprising:
i) a sample collection member having an analyte collection surface in the form of a pad of material mounted to an elongated stem that extends in a longitudinal direction;
ii) a sample storage medium wherein the sample storage medium comprises at least one stabilizing reagent that preserves at least one biological sample analyte for transport or storage; and
iii) a storage medium holder having one or more retention arms and a means for pressing the pad onto the sample storage medium, for transfer of at least a portion of the biological sample from the pad onto the sample storage medium and for then releasing the pad from the sample storage medium,
iv) wherein the sample collection member is configured to be moveable between at least two positions, including a first position in which the pad of material is spaced from the sample storage medium in the longitudinal direction, and a second position where the pad of material is in contact with the sample storage medium,
v) wherein the storage medium holder is configured to enable the sample collection member to be moved between the first and second positions while the one or more retention arms hold the sample storage medium in position, and
vi) wherein the sample storage medium is slidably insertable into the storage medium holder in a direction generally parallel to an interface formed between the pad of material and the sample storage medium when the pad of material is in the second position, and
vii) wherein the one or more retention arms are configured to removably hold the sample storage medium in a position by exerting a force on the sample storage medium.
5. A device including a stabilizing reagent for collecting a biological sample that contains degradable biologically sourced analytes, the device comprising:
i) a sample collection member having an analyte collection surface in the form of a pad of material mounted to an elongated stem that extends in a longitudinal direction, and being configured to be moveable between a first position and a second position;
ii) a sample storage medium comprising the stabilizing reagent that preserves the biological sample for transport or storage, wherein in the first position the pad of material is spaced from the sample storage medium in the longitudinal direction and in the second position the pad of material is in contact with the sample storage medium; and
iii) a storage medium holder configured to hold the sample storage medium in a fixed position and press the pad onto the sample storage medium, for transfer of at least a portion of the biological sample from the pad onto the sample storage medium and for then releasing the pad from the sample storage medium,
iv) wherein the storage medium holder is configured to enable the sample collection member to be moved between the first and second positions while the storage medium holder holds the sample storage medium in the fixed position, and
v) wherein the sample storage medium is slidably insertable into the storage medium holder in a direction generally parallel to an interface formed between the pad of material and the sample storage medium when the pad of material is in the second position, and
vi) wherein the storage medium holder comprises one or more retention arms configured to removably hold the sample storage medium in a position by exerting a force on the sample storage medium.
6. The device of claim 5 , wherein the storage medium holder further comprises an arm that releasably holds the sample storage medium in the fixed position.
7. The device of claim 5 further comprising a resilient member to releasably hold the sample collection member in the second position.