Saturday Night Science: Bad Blood

“Bad Blood” by John CarreyrouThe drawing of blood for laboratory tests is one of my least favourite parts of a routine visit to the doctor’s office. Now, I have no fear of needles and hardly notice the stick, but frequently the doctor’s assistant who draws the blood (whom I’ve nicknamed Vampira) has difficulty finding the vein to get a good flow and has to try several times. On one occasion she made an internal puncture which resulted in a huge, ugly bruise that looked like I’d slammed a car door on my arm. I wondered why they need so much blood, and why draw it into so many different containers? (Eventually, I researched this, having been intrigued by the issue during the O. J. Simpson trial; if you’re curious, here is the information.) Then, after the blood is drawn, it has to be sent off to the laboratory, which sends back the results days later. If something pops up in the test results, you have to go back for a second visit with the doctor to discuss it.

Wouldn’t it be great if they could just stick a fingertip and draw a drop or two of blood, as is done by diabetics to test blood sugar, then run all the tests on it? Further, imagine if, after taking the drop of blood, it could be put into a desktop machine right in the doctor’s office which would, in a matter of minutes, produce test results you could discuss immediately with the doctor. And if such a technology existed and followed the history of decline in price with increase in volume which has characterised other high technology products since the 1970s, it might be possible to deploy the machines into the homes of patients being treated with medications so their effects could be monitored and relayed directly to their physicians in case an anomaly was detected. It wouldn’t quite be a Star Trek medical tricorder, but it would be one step closer. With the cost of medical care rising steeply, automating diagnostic blood tests and bringing them to the mass market seemed an excellent candidate as the “next big thing” for Silicon Valley to revolutionise.... [Read More]

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