Final answer:
The structure at risk with the creation of the 1-2 wrist portal is the median nerve, which can result in symptoms such as numbness, tingling, and weakness in the thumb, index, and middle fingers if damaged.
Step-by-step explanation:
The structure at risk with the creation of the 1-2 wrist portal is the median nerve, which is located between the abductor pollicis brevis (APB) and abductor pollicis longus (APL).
The median nerve is one of the major nerves in the hand and is responsible for providing sensation and controlling the movement of certain muscles in the hand and forearm. Damage to the median nerve can result in symptoms such as numbness, tingling, and weakness in the thumb, index, and middle fingers.
During the creation of the 1-2 wrist portal, care must be taken to avoid injuring or compressing the median nerve to prevent any potential complications.