Study about intramuscular injection skills to be based on evidence and establish it

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I measured the thickness of subcutaneous tissue at sites of intramuscular injection in 553 Japanese adults and elderly, and devised a method for calculating subcutaneous tissue thickness from Body Mass Index or upper arm skin fold thickness. Currently, I am preparing to make an appliance that allows subcutaneous tissue thickness to be confirmed easily. When subcutaneous injections are given frequently, indurations and damage have been confirmed to occur, thus confirming the importance of avoiding repeated injections at the same location. On the basis of these results and those of other researchers, I have prepared a guidebook for intramuscular injection.