Next, comes the most critical moment.
"Syringe number one!"
Zhao Heng said firmly to Tian Zhen, who was standing beside him.
"Okay."
Tian Zhen responded, quickly handing the syringe to Zhao Heng. Their seamless coordination seemed as if they had worked together numerous times.
Zhao Heng took the syringe, selected the right angle, and slowly pierced the skin at a 45° angle, soon gently injecting the surface anesthetic.
Next is waiting for the anesthesia to take effect, then proceeding with the puncture.
Local anesthesia usually takes full effect within five minutes at the latest.
Soon, four minutes later, Zhao Heng nodded to Tian Zhen.
Tian Zhen understood, bent down, and asked softly beside the elderly patient's ear, "Sir, does it hurt now?"
"Pain? No, it doesn't hurt."
The elderly patient felt that his lower back seemed to become numb and didn't hurt at all, so he replied earnestly.
