Hemoglobin (Hb) levels can be estimated non-invasively by examining the conjunctiva, the membrane lining the inner eyelid and covering the white of the eye. A specialized instrument called ToucHb is used for this purpose.
Using ToucHb to Estimate Hemoglobin
ToucHb is a non-invasive instrument that takes an image of the exposed conjunctiva to estimate hemoglobin levels. This eliminates the need for blood draws, which can be a barrier to confirming anemia, especially in individuals who have a fear of needles.
How ToucHb Works
- Image Capture: The instrument captures a digital image of the conjunctiva.
- Analysis: The image is then analyzed using algorithms that relate the color and other visual characteristics of the conjunctiva to the hemoglobin concentration in the blood.
Why Check Hb in Eyes?
Checking Hb levels via the eyes offers a non-invasive alternative to traditional blood tests. This is particularly useful in situations where:
- There is apprehension about drawing blood.
- Frequent monitoring is needed.
- Traditional methods are not readily accessible.
Traditional Methods vs. ToucHb
| Feature | Traditional Blood Test | ToucHb Method |
|---|---|---|
| Invasiveness | Invasive | Non-invasive |
| Needle required | Yes | No |
| Pain | Potential discomfort | Painless |
| Application | Blood draw, lab analysis | Eye image, digital analysis |
Conclusion
Using instruments like ToucHb, hemoglobin can be estimated by imaging the conjunctiva, providing a quick and non-invasive alternative to blood tests.
