Scared of needles? New smartphone app can detect anaemia
The app uses photos of a person's fingernails to accurately measure haemoglobin in their blood.

The app uses photos of a person's fingernails taken on a smartphone to accurately measure how much haemoglobin is in their blood.
Fingernail beds are ideal for detection of anaemia because they do not contain melanin - pigment that gives human skin, hair, and eyes their colour - indicating that the test can be valid for people with a variety of skin tones.

"All other 'point-of-care' anaemia detection tools require external equipment, and represent trade-offs between invasiveness, cost, and accuracy," said principal investigator Wilbur Lam, Associate Professor from Emory University in the US.
"This is a standalone app whose accuracy is on par with currently available point-of-care tests without the need to draw blood," said Lam.
The app, detailed in the journal Nature Communications, is part of the doctoral work of former biomedical engineering graduate student Rob Mannino, who was motivated to conduct the research by his own experience living with beta-thalassemia -- an inherited blood disorder that reduces the production of haemoglobin.
Maninno first took pictures of himself before and after transfusions as his haemoglobin levels were changing.
Later, the researchers studied fingernail photos and correlated the colour of the fingernail beds with haemoglobin levels measured by complete blood count (CBC) in 337 people.

However, additional research is needed to eventually achieve the accuracy to replace blood-based anaemia testing for clinical diagnosis, according to the team.
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