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The BBC News published an article which discusses the benefits of new technology which will allow doctors to measure blood pressure from arterial blood flow through the aorta. Arterial blood flow is more important than other types of blood flow (such as deoxygenated vascular blood returning back to the heart) because it has been freshly…
Some more advanced fingertip pulse oximeters boast waveform displays as one of their features – but what is really going on? Pulse Oximeters differentiate between the light absorbed by the oxygenated arterial blood (what it wants to measure), and other interference (light absorbed by veins, skin and bone, for example). The difference between arterial blood…
Pulse oximetry measures the percentage of oxygen carried through the arteries, compared with the maximum level. A healthy level at resting state is between 95%-99%. When a pulse oximeter is attached to a finger, earlobe or toe, two beams of light (one red, one infrared) are shone through. Because blood absorbs light differently depending on…
It is known that high oestrogen levels during pregnancy cause permanent changes to the mother’s chromosomes, in a process known as epigenesis. This was previously used as one of the reasons to explain why women who have multiple pregnancies are at greater risk of developing heart disease. Recent studies (such as Peters et al. 2016),…
11:30am: Yvette explains that sperm can last up to 7 days, meaning that conception rarely happens at time of mating. Using the example of human beings, Yvette explains to the audience that they may ovulate and conceive in Waitrose. The audience is discussing blood testing and progesterone testing – a relatively expensive method, but widely…