Patent ID: 11919004
Assignee: WISCONSIN ALUMNI RESEARCH FOUNDATION
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 9:
10. A sample extraction cassette for point-of-care molecular testing for a target in a sample provided on a swab, comprising:
a case having:
a chamber configured for receiving the swab;
a wash zone configured for receiving a wash fluid therein;
a reaction zone configured for receiving a reaction fluid therein, the reaction fluid reacting with the target; and

a membrane having a contact portion, the membrane slidably receivable into the case and being moveable between:
a transfer position wherein the contact portion of the membrane communicates with the sample provided on the swab when the swab is received in the chamber such that at least a portion of the sample is transferred to the contact portion;
a wash position wherein the contact portion of the membrane communicates with the wash zone; and
a reaction position wherein the contact portion of the membrane communicates with the reaction zone;, wherein:
the contact portion of the membrane is defined by a hydrophilic adsorbent pad;
the membrane extends along an axis and has a leading end, the hydrophilic adsorbent pad being spaced from the leading end of the membrane; and
the hydrophilic adsorbent pad includes:
a generally arcuate leading edge having first and second ends; and
a trailing edge defined by a first portion extending from the first end of the leading edge and a second portion extending from the second end of the leading edge, the first and second portions of the trailing edge converging as the first and second portions of the trailing edge extend from a corresponding first and second ends of the leading edge.