The arterial puncture arm model is a tool used in medical education to train medical staff in performing arterial puncture procedures. This model typically mimics the actual human anatomical structure, featuring realistic skin, subcutaneous tissue, muscles, and vascular layers, and can provide an experience close to the actual operation.

Steps:

1. Preparation: Wash hands and put on sterile gloves. Check the location of the artery on the model, which is usually the simulated brachial artery or radial artery.

2. Disinfection: Use disinfectant to disinfect the simulated arm, ensuring the operation area is sterile.

3. Locating the Artery: Gently touch the simulated arm to find the pulsation point of the artery and determine the puncture location.

4. Puncture: Use sterile needles and insert them at the correct angle (usually 15-30 degrees) into the surface of the model until the puncture needle enters the simulated artery and simulated blood flows out.

5. Post-Operation Handling: After the puncture is completed, withdraw the needle, press the puncture point lightly to stop the bleeding, and disinfect the model.

Through this operation, trainees can practice the skills of arterial puncture, master the appropriate puncture depth, angle, and be able to handle the reactions after vascular puncture, thereby improving their proficiency and safety in clinical operations.