PCA is a widely recognized abbreviation for patient-controlled analgesia, which refers to the method where patients manage their own pain relief. This approach allows individuals to regulate the amount of pain medication they receive. Various PCA systems exist, with the traditional one involving a computerized pump connected to an IV. Here, patients can press a button to receive a predetermined dose of medication. This setup often includes a continuous low-dose administration of morphine, with the option to add more as needed for consistent comfort. Research indicates that patients using PCA typically require less morphine compared to those who do not use this method. Alternatively, another PCA system uses fentanyl (Duragesic), which is administered through the skin, thus removing the necessity for an IV and pump programming.