Q: Until recently, my blood pressure stayed around 135/75. About two weeks ago, my blood pressure suddenly shot up to 188/90. My doctor increased the doses of my blood pressure pills. But my systolic pressure is still around 170. Why would my blood pressure have increased so suddenly when I hadn't really changed anything? Is 170 systolic OK given my diastolic pressure is 80? A: One of the mysteries of blood pressure is that it can rise or fall without any obvious changes in your life.
The level of CO concentration is measured using a system called Parts Per Million (PPM). For example, 100 PPM CO means that for every 999,900 molecules of air, there are 100 molecules of CO. CO effects people differently depending on the concentration.
Air quality fact sheetDepartment of the Environment and Heritage, 2005 What is carbon monoxide? Carbon monoxide is a gas and is found in air. High levels of carbon monoxide are poisonous to humans and, unfortunately, it cannot be detected by humans as it has no taste or smell and cannot be seen. The natural concentration of carbon monoxide in air is around 0.2 parts per million (ppm), and that amount is not harmful to humans. Natural sources of carbon monoxide include volcanoes and bushfires. The main sources of additional carbon monoxide are motor vehicle exhaust and some industrial activities, such as making steel.