Therefore, your PR interval may or may not be short and I wouldn't worry until you receive a full report. The PR interval is short in children and lengthens as we get older. A normal value in adults is 120 to 200 milliseconds. It is however shorter than 120ms in approximately 2 to 4% of the adult population.
It is SaO2 that measures oxygen saturation of hemoglobin, and it should be clear that it depends on the partial pressure of arterial oxygen. If PaO2 drops, there's less dissolved oxygen, and therefore less saturation of hemoglobin with oxygen.
Answer by Phloem. Confidence votes 553. One way is to put them in a closed container of known volume, like a bell jar, and measure the amount of oxygen consumed or the carbon dioxide given off. ----------------. It's the other way around.Plants take in CO2 and gives off O2.Place a plant in a closed system with a sensitive CO2 meter inside and another outside the container. The difference in the readings would be the CO2 that was used by the plant. Oxygen meters would tell you how much oxygen is given off.nswer by Phloem. Confidence votes 553. One way is to put them in a closed container of known volume, like a bell jar, and measure the amount of oxygen consumed or the carbon dioxide given off. ----------------. It's the other way around. Plants take in CO2 and gives off O2.