Final answer:
Poorly controlled acute pain in older adult postoperative patients can lead to complications such as atelectasis, increased myocardial oxygen demand, and impaired wound healing.
Step-by-step explanation:
Poorly controlled acute pain in older adult postoperative patients can place them at higher risk for a number of complications. One of the complications is atelectasis, which refers to the collapse or closure of a part of the lung, leading to decreased oxygen exchange. Another complication is an increase in myocardial oxygen demand, which can strain the heart. Lastly, poorly controlled acute pain can also impair wound healing, delaying the recovery process.