I cannot create a summary of the requested article because the search results provided do not include the article titled "Patient-Controlled Analgesia" from the New England Journal of Medicine, Volume 394, Number 8, dated February 19, 2026. The available results include articles on sanitary-epidemiological measures, cerebral palsy, bioresonance, and other medical topics, but not the requested article on patient-controlled analgesia. In order to create an accurate and factual summary in accordance with your requirements, I would need access to the full text of this particular article.