System for automatically testing a fluid specimen
View Patent ↗A system for automatically testing a fluid specimen, e.g., urine, to indicate the presence of specified chemical components in the specimen. The system preferably utilizes an assaying device comprised of a collection cup and a cap which carries at least one test strip. The device includes an integrated aliquot delivery mechanism actuatable to wet the test strip with an aliquot delivered from the fluid specimen. The assaying device is configured to operate in conjunction with an electronic reader device capable of actuating the aliquot delivery mechanism and reading the reaction of the test strip. A preferred reader device defines a keyed receptacle for accommodating a complementary shaped cup housing in a particular orientation. The reader device is comprised of a camera for capturing the image of a test strip, an actuator for actuating an aliquot delivery mechanism, and a microprocessor/controller for (1) controlling the camera and actuator and (2) processing the image.
1. An apparatus for use with an assaying device presenting a lower periphery and including a test strip for providing a visual indication of at least one property of a fluid specimen, said apparatus comprising:
an apparatus housing including a base portion and a head portion,
said base portion having a keyed recess formed therein for receiving and holding the device in a fixed position relative to said head portion,
said keyed recess being complementary to the lower periphery of the assaying device to place the device in a specific orientation relative to said head portion;
a camera coupled to said head portion and operable to acquire an image of said test strip;
a processor operable to control said camera to periodically capture sequential images of said test strip, generate a digital representation of each captured image, and to process said digital representations to detect markings on said image indicative of each of said chemical components in said fluid specimen; and
output means for reporting the detection of said markings.
2. The apparatus of claim 1 , further including a selectively actuated piston mounted in said head portion configured for contacting and engaging a portion of the device.
3. The apparatus of claim 1 , further including:
a host computer;
a communication network; and wherein
said output means including a connectivity device for connecting to said host computer via said communication network.
4. The apparatus of claim 1 , further including at least one light source for illuminating said test strip.
5. The apparatus of claim 1 , further including a light shield movably mounted in said head portion for movement toward the assaying device to minimize stray light on said test strip.
6. The apparatus of claim 1 , said base portion being fixed relative to said camera and configured to directly contact the device.