Starting Needle Penetration Techniques

The starting needle was rapidly pierced into the subcutaneous tissue of the epidermis at an angle of 30° to 45°, consistent with the intended blunt needle approach. If the piercing is too shallow, the skin cannot be fully pierced, making it more difficult for the blunt needle to enter laterally. At the same time, passing a blunt needle through a shallow or small entry port causes more pain than when a hypodermic needle pierces the skin in one pass. Penetrations that are too deep can cause unnecessary tissue damage, as well as aggravate bruising that the injector wishes to avoid. Hold the needle at the puncture site for a few seconds to allow the clot to form and allow enough time for the needle to establish a temporary passage through which it can easily enter the tissue.

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