Patient-controlled analgesia (PCA) pumps are medical devices that allow patients to manage their own pain relief after surgery or during hospitalization. These pumps are connected to an intravenous (IV) line and deliver a preset dose of pain medication, usually opioids, when the patient presses a button. This empowers patients to control their pain management according to their individual needs. The PCA pump is designed with safety features to prevent overdose, such as a lockout period that limits how often the button can be pressed. This ensures that patients receive effective pain relief while minimizing the risk of complications. Overall, PCA pumps enhance patient comfort and satisfaction during recovery.