Hypodermic needle how many millimeters into the needle

Hypodermic needle injection generally uses a 1ml syringe, which is 1/3 to 2/3 of the depth of the needle, that is, 5 to 10 mm.

The selected position is generally in the lower margin of the deltoid muscle, which is the three transverse fingers under the acromion, and can also be in the abdomen, which is within the range of the umbilical cord Friday centimeters or the outer thigh. If it's too shallow, it can inject the drug into the skin, and if it's too deep, it can inject the drug into the muscle. Especially in the abdomen into the needle, the needle depth can not be too deep, 6~8 mm is ok. Basically be hit in subcutaneous organization, cannot exceed muscle layer, entered abdominal cavity otherwise, general figure medium this distance is about the same, figure is thin, malnutrition even shallow a few. At the same time, it is necessary to pay attention to the insertion Angle of the needle and the skin is 30 degrees, do not Pierce all the needle stem, in case the needle stem is broken from the root joint. In addition, when choosing the location, we should pay attention to see if there are obvious blood vessels under the skin, and avoid induration, redness and scar.

In summary, hypodermic needles generally enter 5~10 mm, there are special cases, according to the specific analysis.

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