All posts tagged: Covid-19

Coughing woman

Quick Question – Why do we cough?

A cough is one of the major symptoms of Covid-19 and a common feature of any respiratory infection but why do we cough and what actually happens in the body during a cough? Coughs are annoying and irritating, both for the person suffering and for those around them (I seem to be as intolerant of listening to coughing as I am of hearing people chew!) They are however a protective mechanism designed to remove foreign particles from the windpipe and lungs. Larger objects such as food that’s gone down the wrong way and smaller particles such as dust, germs and mucous are all expelled from the body through coughing. The lining of our airways contains specialised cells called goblet cells which produce mucous to keep our airways moist and to trap dirt and germs. Alongside them are ciliated cells which have hundreds of tiny, microscopic legs at their surface which wave, waft and move the mucous and trapped particles back up the airways. During an infection we may have a dry cough where little or …

Red blood cells

Quick Question – What are oxygen sats?

We seem to have developed a range of new vocabulary since the onset of the Covid-19 global pandemic. Suddenly words such as self-isolate, health modelling and social distancing have become the norm. Some of the medical terminology that’s now filling our social media feeds can be unknown and confusing. A question I’ve seen a few times is, ‘What are oxygen sats?’ so I thought I’d answer it in my #quickquestion series. Red blood cells carry oxygen around our body. They pick up oxygen molecules when they travel through the lungs and then transport it around the body attached to haemoglobin, which is a protein in the red cell. Our body’s organs and tissues need a steady supply of oxygen for them to function. Oxygen sats is the short form of oxygen saturation and is a measure of how close blood is to being completely saturated with oxygen. Sats are measured in per cent and the goal is 100 per cent. You might also see oxygen abbreviated to its chemical symbol O2. Healthy people will have …