SP O2%

"You are doing great! You see, the number is increasing to 90," the nurse said while she was checking the machine, which hooked up to the grandpa's mouth and nose.

He lay on the bed and tried to breath very hard. The number was going up and down. Sometimes it went up to 90 and you can see everyone ,who were taking care of the grandpa, showed a little smile on their faces. But when the number went down to 79, no one was sitting down. They tried to call the nurses and told the grandpa

"breath with your mouth, not your mouth. Come on, you can do it."

The machine had two numbers and one data on the screen. The most common is the electrocardiogram. Even though I have never used it before, it is commonly used in the movies. One of the numbers is the heartbeat. Usually you see this number when you use the treadmill.  These  two numbers are important but not what I was concerned.  The last number that we  decided if we want to call the emergency is the SP O2, which is  is a term referring to the concentration of oxygen in the blood. This is the main number influence the other two. For regular people the number is 95. When the number is lower than 85, we have to prepare that something is going to happen.

This was the first time that "the number"  was so important to me. Everyday I wake up and check the time, which shows me the number. I check Facebook and see the number of Likes. I read some research data (the number of the percentage), but nothing really makes me feel the threat of the life.  This SP O2 number hooked up to my grandpa health status and also hooked up to my heart.