Which anxiety-reducing technique leads to the patient becoming unconscious and unresponsive to pain?

The technique that results in the patient becoming unconscious and unresponsive to pain is general anaesthesia. This form of sedation is administered to induce a complete state of unconsciousness, meaning that the patient does not experience awareness of their surroundings, does not respond to stimuli, and feels no pain throughout the procedure. The medications used in general anaesthesia work on the central nervous system to achieve these effects, allowing for surgical and dental procedures to be performed without causing distress or discomfort to the patient.

In contrast, the other techniques mentioned either do not lead to unconsciousness or vary in the level of sedation they provide. Acupuncture and hypnosis primarily serve as complementary therapies to reduce anxiety and do not affect consciousness to the level required for procedures that would typically demand general anaesthesia. Conscious sedation, on the other hand, keeps the patient awake yet relaxed and able to respond, which is not the case with general anaesthesia.