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A bruise on the arm after improper compressions after blood draw? Learn the correct compression technique

A bruise on the arm after improper compressions after blood draw? Learn the correct compression technique

Beijing, 17 Mar (Xinhua) -- Many people have had this experience: after the blood is drawn, the puncture point is a bruise, which cannot be eliminated for several days. Why? Experts say that there is no timely and effective compression after the needle is drawn, which often leads to bleeding from the veins to the subcutaneous, resulting in skin bruising. To avoid bruising, correct pressing techniques are equally important as excellent blood collection techniques.

What are the common mistakes of pressing that can cause bruising? Zuo Qingna, a nurse in charge of the Health Medicine Department of Peking Union Medical College Hospital, said that for example, after a few seconds of compression, if you see that the surface is not bleeding, you will no longer press. In fact, the needle eye on the subcutaneous blood vessels is still bleeding. Another example is that the pressure is not in an appropriate position or the area is too small. Compressing only the skin puncture point and ignoring the compression of the main bleeding point, the vascular wall puncture point, will cause the vascular wall puncture point to bleed in the subcutaneous tissue, causing subcutaneous congestion.

In addition, too light pressure will lead to incomplete compression of the puncture point, can not effectively stop the bleeding; too heavy pressure will cause local capillaries to rupture and produce stasis, if too hard, then in the withdrawal of cotton swabs and other hemostatic items, affected by the impact of the instantaneous larger blood flow may bleed again; while pressing while rubbing is also a wrong practice, is not conducive to puncture point hemostasis, and the blood vessels and subcutaneous capillaries after puncture are very fragile, even if the slight rubbing will cause local congestion.

How to press correctly? Zuo Qingna suggested that the compression area should be sufficient to ensure that the skin puncture point and the vascular wall puncture point can be pressed at the same time, the methods are large fish compression, thumb grip pressure method, three-finger compression method; only press without rubbing, continuous compression for at least 5 minutes, the force is even and moderate, coagulation dysfunction or oral aspirin patients should appropriately extend the compression time; the elbow should be straightened when pressing, because the elbow compression will increase the additional pressure and cause the compression point to move with the skin away from the puncture point, Thus the puncture point of the vascular wall occurs subcutaneous congestion due to ineffective compression.

A bruise on the arm after improper compressions after blood draw? Learn the correct compression technique

Correct compression method (Image courtesy of Peking Union Medical College Hospital)

What should I do if I have been bruised? Zuo Qingna said that within 24 hours, you can use a cold towel or ice pack to compress cold compresses to constrict the blood vessels, speed up the hemostasis, and avoid lifting heavy objects with this side limb; after the bruise appears for 24 hours, then use a hot towel to compress hot compresses to promote blood circulation and speed up the speed of stasis.

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