What should be monitored closely when administering local anesthesia?

Monitoring the patient's blood pressure closely when administering local anesthesia is essential for several reasons. Local anesthetics, especially those containing epinephrine or other vasoconstrictors, can have systemic cardiovascular effects. These substances can increase heart rate and blood pressure, potentially leading to adverse reactions, especially in patients with underlying cardiovascular issues.

By keeping a close eye on blood pressure, the dental professional can promptly identify any abnormal changes that may indicate a negative reaction to the anesthesia. This vigilance is particularly crucial in patients with a history of hypertension, heart disease, or other cardiovascular conditions, as they are at a higher risk of complications. Additionally, monitoring blood pressure is a standard practice that ensures patient safety and helps in making informed decisions during the procedure.

While the age of the patient and their previous dental visits may provide relevant background information, they don't directly influence the immediate management of local anesthesia, making them less critical to monitor in this context.