An AC system has many components: compressor, condenser, receiver dryer, evaporator, and hoses. The compressor, the âheartâ of the carâs air conditioning system works like a pump taking refrigerant, (R-12 in older cars, R-134a in 1995 and newer cars) and pressurizing it, passing it along to the evaporator. The AC compressor has several moving parts (including pistons and valves).
They vary throughout the day. (Click here for a blood sugar chart.) For someone without diabetes, a fasting blood sugar on awakening should be under 100 mg/dl. Before-meal normal sugars are 70â99 mg/dl. âPostprandialâ sugars taken two hours after meals should be less than 140 mg/dl. Those are the normal numbers for someone without diabetes.
For this test, a patient is asked to fast overnight. He is then asked to drink a sugary liquid while in the doctor's office. The patient's blood sugar levels are measured regularly over the next several hours. After 2 hours, the blood sugar level should be below 140 milligrams per deciliter in a healthy patient.