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What's a Cc of Blood? A "cc" of blood is 1 cubic centimeter of blood. A cubic centimeter is equal to 1 milliliter. The common human has about 5,000 cubic centimeters of blood. Blood is an essential factor in the human physique that distributes nitrogen, oxygen and different nutrients to very important organs. Blood is composed of plasma and blood cells. Plasma accommodates proteins that help in blood clotting during injury. About half of blood volume is made up of blood cells. Red blood cells carry oxygen to tissues and organs, white blood cells fight infections and BloodVitals SPO2 platelets help in blood clotting. The American Red Cross collects roughly 15.7 million blood donations every year in the United States. About 1 pint, or 473 cubic centimeters, of blood is collected throughout the donation. Based on the American Red Cross, one blood donation can save up to a few lives, as purple blood cells, platelets and plasma can be used individually from the blood.

The Apple Watch Series 6 feels like it has perfected many of the options I appreciated about its predecessor. It has a brighter all the time-on display, a extra highly effective processor, sooner charging and two new colorful options to choose from. However the characteristic I was most excited to check out was its new sensor that measures oxygen saturation in the blood (aka SpO2) with the tap of a display screen. As somebody who panic-bought a pulse oximeter at the beginning of the coronavirus pandemic and still checks her levels at the first signal of a cough, the thought of having one strapped to my wrist at all times was sufficient to pique my interest. But in contrast to the ECG feature on the Apple Watch, which has been tried, examined and BloodVitals experience cleared by the US Food and Drug Administration, together with the irregular coronary heart rhythm notifications, SpO2 on the Apple Watch still seems to be in its early levels. Navigating all this new knowledge will be daunting for anybody who's not a medical skilled.

I bought an FDA-cleared pulse oximeter, the system medical doctors use to measure BloodVitals SPO2 in your fingertip, as a precaution when coronavirus circumstances in the US started to climb. Having low blood oxygen levels does not assure you have COVID-19, but it is one in all the foremost signs of the disease. I had learn horror BloodVitals experience tales of people who waited too long to go to the hospital and had died in their sleep because they did not realize their ranges had dipped in a single day. It is best to all the time check with a physician if you're experiencing shortness of breath (one other symptom of COVID-19), even if a pulse oximeter says you are in a healthy vary, but I found comfort in understanding that I could at the least use it as a reference if I ever skilled shortness of breath. That's not something you can do with the Apple Watch -- Apple says it ought to be used for wellness functions only and never as a medical gadget, which means you'll have to take the results with a grain of salt and BloodVitals experience should not use it to screen for any sort of disease, which is what I had been hoping to get out of it.

But there could also be other advantages of getting it strapped in your wrist at all times. Very like a pulse oximeter, the Series 6 makes use of pink and infrared gentle from its new sensor to find out the share of oxygen in the blood. But as a substitute of shining the sunshine via your fingertip, it makes use of the sunshine that is reflected back from the blood vessels in your wrist to find out your oxygen levels based mostly on the color BloodVitals SPO2 of your blood. In the course of the setup course of you are requested whether or not you want to activate SpO2 monitoring, which I did, but you can all the time go back and disable it in the settings after the actual fact. The very first thing I did after strapping on the Watch was open the Blood Oxygen app. It provides you just a few tips on tips on how to get one of the best outcome and you need to relaxation your arm on a table or flat floor while the Watch is taking a reading.

Then the 15-second countdown begins and you are performed -- straightforward and painless. I received a 95% on my first read, which was lower than what I'm used to from my pulse oximeter. Anything above 90% is usually considered by clinicians to be within a wholesome vary, but generally, higher is best. I tested it a few more occasions and obtained slightly completely different results within a few proportion points relying on whether or BloodVitals experience not I was utterly nonetheless and silent through the check, the place I had the watch positioned on my wrist and the way tight the strap was. There are lots of factors that may affect a reading, comparable to skin temperature or the position of the sensors on the physique. Side-by-side with my pulse oximeter, the Apple Watch was usually off by about one or two points, however typically spot on. What was more interesting to me was the BloodVitals SPO2 information that collected over time in the Health app .