Butterfly needles are often used on people who might be difficult to perform venepuncture on. These include: older adults, infants, children and people who are “difficult sticks” The butterfly needle requires a shallower angle compared to an IV catheter. The smaller-length needle is easier to place more precisely on veins that are especially fragile, small in size, or that roll. Butterfly needles are often used when a person is giving blood, such as for a blood bank. The needle has flexible tubing attached to the end that makes it easy to connect to other tubing to collect blood.

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