Cartridge and instrument for testing biological samples

Abstract

An example cartridge has an opening for a dispenser used to inject a sample fluid into the cartridge, a reservoir to receive the sample fluid, and a view window through which the sample fluid is viewable to a user of the cartridge. A member coupled to the view window at a predetermined position may indicate an amount of fluid suitable for a diagnostic test performed by the cartridge. The cartridge may include surfaces angled with respect to the each other to define a slope for flow of sample fluid down from the opening when the cartridge is upright. An instrument may include a physical interface to hold a cartridge during sample injection, and provide a user interface with prompts corresponding to injection of sample fluid and / or performance of the diagnostic test. A sensor may detect a state of the cartridge or its contents before, during, and / or after the diagnostic test.

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