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.
âA total cholesterol level of less than 200 mg/dL (5.17 mmol/L) is normal. âA total cholesterol level of 200 to 239 mg/dL (5.17 to 6.18 mmol/L) is borderline high. âA total cholesterol level greater than or equal to 240 mg/dL (6.21 mmol/L) is high. The total cholesterol level can be measured any time of day. It is not necessary to fast (avoid eating for 12 hours) before testing.