Positive blood culture sample preparation

Earlier results on the lab systems you already own

Positive blood culture in. Viable bacteria out.

The 3iDx cartridge acts on positive blood culture samples. It converts positive blood culture sample into a test-ready microbial suspension for analysis using existing laboratory systems.

The 3iDx cartridge is not currently FDA-cleared.

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The wait

Your lab already has the systems. The wait comes first.

After a blood culture flags positive, most samples wait about a day for colonies to grow before analysis can begin. That overnight step is where the time goes, and it's the step the cartridge removes.

Same laboratory systems
Recover and analyze a broad range of bacteria
~24 hours faster results
How it fits

One front-end step. Existing downstream methods.

The cartridge fits between a positive blood culture and downstream laboratory analysis. It prepares a microbial suspension while leaving identification and susceptibility testing to the laboratory's established methods.

01Input

Positive blood culture

A sample from a positive blood culture is introduced into the cartridge.

02Preparation

Cartridge processing

Blood-culture matrix components are reduced and viable bacteria are recovered.

03Output

Microbial suspension

Recovered bacteria are available for downstream laboratory analysis.

Illustration of cartridge compatibility concept and downstream laboratory methods: a positive blood culture from a blood culture monitoring system is converted by the cartridge into a test-ready microbial suspension for automated ID and susceptibility testing, disk diffusion testing, broth microdilution and MALDI-TOF identification.
What labs ask us first

Practical questions, straightforward answers.

How long does the process take?

The cartridge prepares a positive blood culture sample in approximately five minutes.

Do I need another instrument?

No new analytical instrument is required. The cartridge is designed to prepare viable bacteria for analysis using existing laboratory systems.

Is the procedure complicated?

No. It involves a short sample-preparation procedure using the cartridge, without requiring a separate proprietary reagent system.

What does the cartridge produce?

A suspension of viable bacteria that can be used for subsequent laboratory analysis.

A natural question

Is it really that simple?

The cartridge is a consumable sample-preparation device. It does not require a new analytical instrument or a proprietary reagent platform. Laboratories continue to use their established downstream methods.

Discuss the technology
What happens next

Start with a conversation.

Different laboratories have different questions. These are possible ways to engage⁠—⁠not a required sequence.

01Conversation

Let's talk

Discuss the cartridge, how it works, and findings from laboratory evaluations.

02Demonstration

Arrange a demonstration

Explore an opportunity for us to demonstrate the cartridge in your laboratory.

03Feasibility

Explore a feasibility evaluation

Discuss the possibility of evaluating the cartridge in your laboratory.

Contact 3iDx

Interested in learning more?

Tell us what interests you. We can share more about the technology, discuss evaluation findings, or explore a conversation about your laboratory.

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Email: info@3idx.com

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3iDx 3iDx · 3i Diagnostics, Inc. · Germantown, Maryland info@3idx.com © 2026 3i Diagnostics, Inc.