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A commonly used subcutaneous injection site for heparin

  1. Lower margin of the deltoid of the upper arm

  2, hip

  3. Front and outside of the thigh

  4. Usually choose the best injection site -- abdomen

  Reasons :(1) large injection area

  (2) subcutaneous fat

  (3) relatively few capillaries

  (4) constant subcutaneous temperature

  (5) fast drug absorption

  (6) not affected by exercise