Intravenous infusion feeding to determine the depth of the needle is mainly analyzed by the return of blood to the intravenous infusion line and the condition of the puncture site after the infusion.
Intravenous infusion is one of the basic clinical operations, the puncture needle will be punctured into the vein and stay in the vein, after the establishment of the channel, the medicinal fluid through the puncture needle into the vein. After absorbing the drug components through the body, it exerts the corresponding drug effects.
The vein is selected prior to the puncture and the puncture site is then sterilized using iodophor or alcohol. Normally, the angle between the puncture needle and the skin is around 20 degrees, and the operator slowly inserts the puncture needle into the vein. Once the vein is punctured, a bleed-back occurs, which means that a small amount of blood enters the tubing of the infusion set.
The return of blood indicates that the puncture was successful, and then the infusion set is opened and the medication is slowly injected into the vein. If there is bulging at the puncture site during the infusion, it means that the puncture is too deep and there is leakage of medication, so it is necessary to remove the puncture needle and re-puncture in time.
Therefore, whether the depth of the infusion needle is appropriate or not, mainly depends on whether there is blood return from the puncture, and whether there is localized bulging during the infusion process.