Abstract: Methods and systems are contemplated in which a leading substance may be separated from a lagging substance. A fluid sample comprising the leading substance and the lagging substance can be applied to an absorption substrate through which the leading substance and the lagging substance may diffuse throughout. The absorption substrate may be in contact with a separation substrate to form a fluid pathway therebetween, allowing the leading substance and the lagging substance to then diffuse throughout the separation substrate. The separation substrate may be operative to permit the leading substance to diffuse throughout the separation substrate while impeding the diffusivity of the lagging substance, which may allow the leading substance to separate from the lagging substance. A collecting element may collect the leading substance from the separation substrate at a portion of the separation substrate where sufficient separation between the substances has occurred.

Abstract: A hinge mechanism includes a base, first rotating components, second rotating components, a first connecting component, a second connecting component, a floating support component, and elastic reset members. In a case that the hinge mechanism is in a first state, at least one of the plurality of the second rotating components supports the floating support component, and the elastic reset members are in a stretched or compressed state. A distance between an outer wall of the base facing away from a rotation axis of the first rotating component and the floating support component is a first distance. In a case that the hinge mechanism is in a second state, the second rotating components avoid the floating support component, a distance between the outer wall of the base and the floating support component is a second distance, and the second distance is less than the first distance.

Abstract: An absorbent member, and a recorder that identifies a time and a date of fluid absorbed by the absorbent member.

Abstract: A blood sampling device is provided having holder with a manipulating end and an absorbent probe on the opposing end. The probe is of hydrophilic polymer sized to directly absorb a predetermined volume of up to about 30 microliters of blood. Ribs on the holder position the probe within a compartment of a container to prevent contact with the container. The ribs also position the probe within extraction wells.

Abstract: An absorbent member, and a recorder that identifies a time and a date of fluid absorbed by the absorbent member.

Abstract: A blood sampling device is provided having holder with a manipulating end and an absorbent probe on the opposing end. The probe is of hydrophilic polymer sized to directly absorb a predetermined volume of up to about 30 microliters of blood. Ribs on the holder position the probe within a compartment of a container to prevent contact with the container. The ribs also position the probe within extraction wells.