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as a patient giving a few tubes of blood samples two times ina month for passport and visa health reports in two countries, i can say that it was more comfortable for me when they used butterfly needles because nurse fixed the needle with plaster immediately after injection and after that collected blood sample with tubes without touching it. I am not scared of needles and i just do as they say but normally while they collect blood in tube, some BAD nurses "jiggle the needle" in my vein a lot and i feel like i am going to faint with strong nausea. I hate these kind of nurses and they even blame me for this if i tell them "you play too much". Butterfly needles are lifesaver with these kind of nurses. Because it is attached to a long flexible pipe, whatever they do in the other end just wont hurt me. They take at least 3-5 tubes of samples so they need to plug and unplug tubes. If the nurse is not good skilled this process is very painful for me. believe it or not, there are nurses out there who treat you like an animal. it is really annoying.

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Q: What is the advantage of using a butterfly needle?
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