Patent ID: 8741233

Claim:
A disposable cartridge for blood analysis comprising: a sample introduction port for receiving a fluid sample; a sample loading channel in fluid communication with the sample introduction port; a reagent channel in fluid communication with the sample loading channel, the reagent channel including a mixing region wherein the fluid sample is mixed with a reagent to produce a processed sample; a sheath channel in fluid communication with the reagent channel, the sheath channel for carrying a flow of a sheath fluid, wherein the reagent channel is configured to deliver the processed sample through a sidewall of the sheath channel and introduce the processed sample into the sheath channel at an angle of between 45 and 135 degrees relative to a direction of fluid flow of the sheath fluid within the sheath channel; a measurement channel including a hydrodynamic focusing region disposed adjacent a transparent window, wherein the processed sample is carried by the sheath fluid from the sheath channel into the measurement channel and past the transparent window; and an on-board waste storage reservoir in fluid communication with the measurement channel, the on-board waste storage reservoir configured to receive the processed sample and the sheath fluid after they have passed through the measurement channel.