Why does the infusion pump still have bubbles after emptying the gas in the infusion set?

Those infusion pumps that open consumables are not responsible for matching with infusion sets, that is, they can only ensure that the most commonly used infusion sets can work. Then, (1) for those thin-walled infusion sets, it is easy to cause bubble false alarm, that is to say, it will be too sensitive to the bubble alarm of inferior infusion sets; (2) For those infusion sets with thick wall, when the liquid medicine leaks from the outside, bubbles will leak and give an alarm, that is to say, the infusion pump with consumables still has the risk of causing air embolism in patients!