Central venous access, the insertion of a catheter into the femoral vein is an important medical procedure, especially during the emergency care of children and adults. It enables the administration of drugs and liquids directly into the bloodstream. Here are the steps to perform this procedure in the femoral vein:

1. Lay the child in the “frog pose” with hips spread.
2. Initiate analgesia and sedation as needed.
3. Clean the skin carefully with an antiseptic to reduce the risk of infection.
4. Find the femoral artery (the femoral vein is medial to the artery).
5. Local anesthesia can be administered with 1% lidocaine if necessary.
6. Insert needle and catheter with saline solution (0.9% NaCl).
7. Puncture medial to the femoral artery (femoral pulse), at a 30-degree angle to the child’s head, approximately 1 cm below the inguinal ligament. Move the needle toward the navel and gently aspirate until blood is drawn into the syringe.
8. Detach the syringe.
9. Thread the guide through the needle.
10. Thread the catheter over the guidewire into the vein.
11. Remove the guidewire through the catheter and close the end of the catheter with a syringe containing a 0.9% NaCl solution.
12. Secure the catheter by suturing in place.
13. Connect infusion as needed.

This procedure is usually performed by medical professionals and requires training and expertise. It is important to maintain aseptic conditions to reduce the risk of infection during the procedure.