After infiltrating local anesthetic subcutaneously along each of the borders of the planned anesthetic field ...infiltrate the contents of the field with local anestheticaspirate the syringe, watching the chamber for flashback of bloodproceed with the definitive surgical procedureinfiltrate the borders of the field with local anesthetic intradermallytest the area of skin for sensation

It seems like you're asking for a step-by-step guide on how to administer local anesthesia before a surgical procedure. Here's a simplified version:

1. Identify the area where the anesthetic will be applied. This is known as the anesthetic field.

2. Apply the local anesthetic subcutaneously (under the skin) along the borders of the anesthetic field. This helps to numb the area and prepare it for the surgical procedure.

3. Once the borders have been infiltrated, proceed to infiltrate the contents of the field with the local anesthetic. This means injecting the anesthetic into the tissue within the field.

4. Aspirate the syringe, which means to pull back on the plunger. Watch the chamber for a flashback of blood. This is to ensure that the needle is not in a blood vessel. If you see blood, you will need to reposition the needle.

5. Once you have confirmed that the needle is correctly positioned, you can proceed with the definitive surgical procedure.

6. After the procedure, infiltrate the borders of the field with local anesthetic intradermally (within the skin). This helps to provide additional pain relief after the surgery.

7. Finally, test the area of skin for sensation. This is to ensure that the anesthetic has been effective and the area is numb.

Remember, this is a simplified guide and the exact procedure may vary depending on the specific situation and patient. Always follow the instructions of the supervising physician or surgeon.