概述

A butterfly needle is a device used to access a vein for drawing blood or giving medications.

一些医疗专业人员称蝴蝶针为“有翼的输液组”或“头皮静脉”。该套件之所以得名，是因为空心针的两侧都有塑料“机翼”。

While some elements of the butterfly needle can vary, most have a needle in a winged sheath or plastic covering that’s pulled back to reveal the needle. The needle is attached to tubing that may have a luer lock. This is a type of connection that you can twist a syringe onto.

A medical professional will use a butterfly needle to draw your blood or to try and access a vein to give intravenous (IV) medications.

Alternatively, they may use an intravenous catheter. It has a retractable needle that’s inside a protective sheath. The needle is inserted into the vein, and then a button is pushed to retract the needle and leave the sheath or catheter.

This is different from a butterfly needle, where the needle gets left in the vein instead of a plastic sheath. However, the butterfly needle is usually smaller in length than an IV catheter.

在某些情况下，应选择一个。抽血是其中一种情况。

一个人抽血时可能会选择蝴蝶针，以便以下目的抽血：

Venipuncture

静脉穿刺是当静脉蛇毒者进入静脉吸收血液时。静脉混血儿是一名医学专家，专门从事吸血。

蝴蝶针通常用于可能难以执行静脉穿刺的人。这些包括：

  • 老年人
  • 婴儿
  • 孩子们
  • people who are “difficult sticks”

蝴蝶针需要浅角有限公司mpared 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.

IV水合

如果您需要静脉注射液，护士或医生可能会使用蝴蝶针进入静脉。IV水合可以用于治疗脱水，或者您因疾病或未决的手术而无法进食或饮料。

空心蝴蝶针可允许注入静脉输液，以帮助您补充您并恢复液体水平。

药物

蝴蝶针还使医生可以服用静脉注射药物。这些药物可以通过注射器“推动”。当您无法用口腔服用药物或需要药物来快速工作时，让他们通过静脉会有所帮助。

Butterfly needles usually aren’t a long-term solution to IV therapy, such as giving medications or fluids. This is because the needle can easily become displaced from the vein. A doctor may suggest IV access through a bigger vein via a central line or peripherally inserted central catheter (PICC) line.

制造商制作各种尺寸的蝴蝶针。它们是通过量规来衡量的。大多数蝴蝶针的范围从18至27量表不等。数字越高，针尺寸越小或较薄。

虽然尺寸可能会有所不同，但大多数针头尺寸为21至23量表。如果一个人使用较小大小的针（例如25至27量规），则由于较小的针头，血液更有可能被破坏（溶血）或凝块。

A 2016年研究 found that using butterfly needles to draw blood reduced rates of blood breaking down by half compared to using a person’s IV catheter to draw a blood sample.

Another earlier study found the type of needle used was one of the strongest predictors that a blood sample would or wouldn’t get destroyed. The researchers found that using butterfly needles was less associated with causing blood breakdown when compared with IV catheters.

Using the butterfly needle may also have more advantages for those with bleeding disorders, such as血友病orvon Willebrand disease.

Butterfly needles enable IV access using a small needle for IV infusions or blood draws. Ideally, using a butterfly needle reduces the likelihood a person will experience profuse bleeding after an IV stick or blood draw.

用于静脉注射药物或液体的蝴蝶针涉及在静脉内留下一根针头。另一方面，静脉导管是薄而柔韧的导管，末端没有针。如果意外去除，留下针头可能会伤害一部分静脉或附近的区域。

While the amount of time a butterfly needle can be used for medications or fluid administration may vary based on the manufacturer,some manufacturers建议用蝴蝶针注入不超过五个小时。

有时，蝴蝶针很难正确插入。短针很容易从静脉中拉回，您可能需要另一根棍子。

To prevent unintended sticks, some butterfly needles have a “push-button” function that retracts the needle when the blood draw is complete. Sometimes it’s possible to push this button before intended.

A butterfly needle may make the blood test process easier if you have veins that are typically very tough to access or have a medical condition that may cause you to bleed more than is typical.

These needles are very helpful for people who traditionally have veins that are hard to find, collapsible, or small. With the right practitioner, butterfly needles can make blood draws a generally easy and fairly painless process.