Clinical meaning
A PCA pump is a computerized device that delivers pain medication (usually an opioid like morphine or hydromorphone) through an IV line when the patient presses a button. The pump has safety settings including a lockout interval that prevents overdosing by not delivering another dose until enough time has passed. The medication works by blocking pain signals in the brain and spinal cord. The most important safety rule is that ONLY the patient should press the button — if they are too sleepy to press it themselves, they are too sleepy for more medication.
Exam relevance
Risk factors: - Patients who are very sleepy or sedated - Patients with breathing problems (COPD, sleep apnea) - Elderly patients - Family members pressing the button for the patient - Patients receiving other sedating medications
Diagnostics: - Count respiratory rate every 1-2 hours - Check oxygen saturation with pulse oximeter - Assess how alert or sleepy the patient is - Ask patient to rate their pain on a 0-10 scale - Check the PCA pump display for total medication delivered