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Domestic Blood Chemistry Analyzer

Spring 2021
DSID 144

Blud is a compact home blood chemistry analyzer that makes it easy to do your own blood analysis at home safely while also sharing important data with your doctor.

This ensures you are always connected to a medical professional to give you feedback on how you are doing or prescribe any sort of medicine.

It tests for A1C, CMP-14, Creatinine, and Triglycerides.  


About Blood Chemistry Analyzers

A blood chemistry analyzer is used to determine components in blood.

Evaluates how well organs are working. 

Helps diagnose diseases and conditions such as cancer, HIV, diabetes, and heart disease.

There are at-home versions but they only test for glucose and cholesterol.  

Who is this for?

Type 2 Diabetic Patients

Person with established career

Gets blood work done about 1-2x a month

Patients that are looking for an at home system to reduce the number of times they need to visit doctors but still want to keep in touch with them. 


Current Problems & Statement

After doing research on lab and domestic anaylzers, there were several main points that needed to be considered during the process.



When drawing blood, the injection needs to be precise to make sure the user is not harmed in the process.

Fear of Needles

Several patients may have Trypanophobia which keeps them from doing analysis on their own.

Complex Data Results

Sig figs and units can be confusing to a non professional. Most patients need to just know if they are within the safe and healthy range.

Mobility and Scale

Many analyzers can be large for a wide array of measurements. It needs to be moved easily and blend in a home.


With these issues in mind, I began to ideate. I mainly focused on how its used to make sure it was as easy and safe as possible along with where it lived and how it fit in.   


Top Concepts

There were a few attempts at different places where a person could draw blood. In the end, I stuck with the one drawing from the arm since it was the most familiar for a person and allowed for safer methods.


With that came the need to break the design into 2 parts, the analyzer and the probe for drawing blood. The concepts that were working were those that were more automated.

Walking through

Going through the motions helped me find issues and discover new things that need to be considered.


A major one being cutting down time someone holds on to probes since in this concept, their arm would get tired.

Interface Tests

For the probe, the goal was for it to make it easy so one person could use it on their own and would stay in place. All controls had to be visible and easily accessible at uncomfortable angles.


Unbalanced and arm gets tired

2 button controls not visible

Strap is not the best for different arm sizes


Pad conforms to all arms and stays in place with one control


Technology to pair

After researching different technologies and methods for drawing blood. One stood out because of its safety and form factor. 

TAP uses a series of microneedles to make the blood drawing process pain-free, safe, and not require batteries.

Ironing out Details



The focus was the ease of use and removing anything that may be confusing in the interface and how the results would be displayed all the while being comfortable to look at and carry around. Another thing was reducing the controls to simplify the process. 

Model Progression

Starting with slim forms with concern over storage, the form began to change based on what was most comfortable, accessible, and easy to read when sitting down in a living room or bedroom.



Making blood tests easier and safer

Main Features

Dot Display

Easy to read interface  


Hand slot

For easy carry

Syringe Drop In

Put the syringe in to start the analysis.

Removable Back

Pops off to reveal the reagent cartages for replacing


Holds the adhesive pads and syringes

Probe Battery

Battery indicator

Probe Features



Charging contact

For easy charging

For slow and painless blood drawing.


For searching for the correct vein

EVA Adhesive Pad

Keeps probe in place

Button/ Indicator

Switch from search to draw and shows current job.


Draws the blood like an actual syringe to reduce electronics.

Understanding the interface

The dot display allows displaying levels in an easy-to-read way. At the same time, different test results meanings are displayed in different ways.


These tests are based on safety ranges where the center represents great health.

Level-like for the intensity of your condition. Red is intense, yellow being prediabetes, and green is normal no diabetes.   

How to use


Get a message from doctor to do a blood test and you get your analyzer out


Once done, light will go blue. Take off the probe safely and pull out the pod


Take out the probe and put in a cartridge and the pad on


Open flap and drop in pod to begin analysis


Slide probe around arm until button goes green. Press pad down to stay in place


Once done, throw the pod and pad away


Press the button to start drawing blood. (Takes about 45 minutes)


User will see the quick results on the dot display based on a safely range

Probe in action

Putting disposable syringe into blood probe

Drawing blood

Process of getting blood drawn from the arm. (45 Minute Process)

Push to release

Reagent packs release similar to replacing ink cartrages on printers. 


Exploded View

Bill of Materials


Thank You!

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