[Clinical study on the mechanism of nerve block in pain clinics].
D000765:Anesthesia, Conduction; D002245:Carbon Dioxide / Q000097:blood; D006801:Humans; D010100:Oxygen / Q000097:blood; D059408:Pain Management; D010991:Plethysmography; D012119:Respiration
D002245:Carbon Dioxide; D010100:Oxygen