Blood: CBC test

A complete blood count (CBC) is a laboratory test that indicates the counts of white blood cells, red blood cells, and platelets.

A white blood cell differential is a laboratory test that provides information about the types and amounts of white blood cells in the sample. The test measures the amounts of the five normal white blood cell types – neutrophils, lymphocytes, monocytes, eosinophils, and basophils – as well as abnormal cells if they are present.

Microscopist examines the smear in a systematic pattern, scanning from side to side within the feathered edge (single layer of cells at the end of the smear) and counting cells consecutively. Microscopist counts at least 100 white blood cells using 100x or 40x objective lens magnification.

Celly supports 2 types of CBC test - manual CBC and CBC with motorized stage.

CBC (Manual)


Put the sample, turn on the light, use 100x immersion objective magnification, and set the lens focus. Move the field of view to the monolayer of cells.

Test execution

Open the test configuration panel (left bottom corner). Set Test type = Blood: CBC. Tap the main screen to return.

Let's check the app settings - push the gear icon in the right bottom corner to open the menu. Set Sensitivity in range 60-80%. Leave the other settings as they are.

At the first launch, the app will ask you to calibrate color. Move the field of view over an empty area and press Ok

Start your test using the Red Record Button 🔴 Move your slide, controlling the focus. The app will automatically detect and count white blood cells. Finish your test (Stop button -> Complete) or the app will complete the test automatically (when reach configured number of Cells).

If a cell was not detected, hold it with your finger for a few seconds

Result review and confirmation

  • Log in on the website. Go to the Tests page. Push the View button to open your report.

  • Go to the Cells tab. Drag the cells to the appropriate type to correct errors. Confirm the test using the Approve button.

Use the hotkeys for the fast class correction: hover over the cell and press the hotkey button - the cell will immediately change the class

  • On the Snapshots page, you can review the photos. The application automatically captures 10 photos during the test. You can find here your manual snapshots too.

  • On the Report page, you can review and download the final PDF report with the following sections:

    • WBC-differential, reference ranges, and abnormality flags.

    • RBC distribution by Size, Shape, Color, and Inclusions

Celly can automatically store results in LIS, see instruction

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