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.
NCEP defines a desirable total cholesterol level as less than 200 mg/dL, and levels for most women stay in the healthy or desirable range until middle-age. But between the ages of 45 and 55, women's average total cholesterol rises to almost 220 mg/dL. Between the ages of 55 and 64, those levels average 240 mg/dL. Total cholesterol levels between 200 and 239 mg/dL are considered borderline high, meaning you have a borderline-high risk of developing heart disease. Levels of 240 mg/dL and above put you in the high-risk category for developing heart disease. LDL cholesterol levels less than 100 mg/dL are considered optimal, according to NCEP guidelines.