Femoral artery puncture is generally indicated for blood gas analysis as well as special invasive examinations. Femoral artery compression is taken to promote hemostasis after femoral artery puncture. Postoperative care mainly includes the following: First, observe whether the femoral artery compression is firmly compressed and whether there is blood leakage. If there is bloody exudation, it means that the femoral artery compression is not indeed, and special compression treatment is needed again. The second point is that too tight a compression of the femoral artery may lead to obstruction of venous return and swelling of the lower extremity, and it is recommended that the lower extremity be elevated. The third point is that if aseptic operation is not observed during the puncture, it may lead to redness, swelling, infection and other signs at the puncture site. After hemostasis of the femoral artery puncture, it is necessary to change the medication regularly to prevent local bacterial infection. The fourth point is that there are other care such as observation of terminal skin blood flow and other special precautions.