Pneumothorax - In a pneumothorax, air collects in the pleural cavity. It may be caused by trauma to the chest, chest surgery, and COPD among other causes. When a pneumothorax is small, it may simply be observed to see if the air is reabsorbed.
This ratio is determined by dividing the HDL cholesterol into the total cholesterol. If a person has a total cholesterol of 200 mg/dL and an HDL cholesterol of 40 mg/dL, his or her total/HDL cholesterol ratio would be 5:1. The goal is to keep this ratio below 5:1, with the ideal being below 3.5:1.his ratio is determined by dividing the HDL cholesterol into the total cholesterol. If a person has a total cholesterol of 200 mg/dL and an HDL cholesterol of 40 mg/dL, his or her total/HDL cholesterol ratio would be 5:1. The goal is to keep this ratio below 5:1, with the ideal being below 3.5:1.
These measures are: LDL, HDL, total cholesterol and cholesterol ratios. Before finding out your cholesterol levels, you need to have a blood test. After your blood test do not get too much alarmed if your total cholesterol level is higher than normal.You must understand the correlation of total cholesterol, LDL and HDL to the cholesterol ratio, which is explained below.ll the numbers and measures below are expressed in mg/dL. 1. Total Cholesterol Levels. 1  Total normal levels of cholesterol should be under 200. 2  200 to 239 is borderline high; and 240 and higher is considered high.