Increased attention to improving the provision of analgesia has led to calls for increased use of pain measurement systems, including visual analog scales, which have not been validated for use in clinical care. Objective: To evaluate the ability of the visual analog scale to differentiate between patients with acute, painful conditions requiring pain medication, and those not requiring analgesia. The issue of inadequate control of pain in the health care setting has received increasing attention. Recent standards for the evaluation and treatment of pain in patients published by the Joint Commission on Accreditation of Healthcare Organizations (JCAHO) 1 have drawn much attention to this issue. The use of pain scores, such as a ten-point system, visual analog scale (VAS), and other systems, has been recommended by a number of sources, including the JCAHO, as an effective way to implement these standards.These scoring systems have been validated for use in research settings and are commonly used to quantify subjective experiences. Although used in research settings to quantify patient pain and other symptoms, to the best of our knowledge their ability to identify patients desiring analgesia has not been studied.We designed a study to investigate the ability of a commonly used pain-scoring system, the VAS, to discriminate between emergency department (ED) patients with acute, painful conditions desiring pain medication, and those not desiring analgesia.
METHODSStudy Design. We conducted a prospective study of patients over the age of 17 years presenting to the ED at North Carolina Baptist Medical Center in June and July 2001 with acute pain. The Institutional Review Board of Wake Forest University School of Medicine approved this study. Informed consent was waived.Study Setting and Population. The study was conducted in the ED of North Carolina Baptist Medical Center, the academic, tertiary referral hospital that serves as the main teaching hospital of Wake Forest University School of Medicine, in Winston-Salem, North Carolina. The annual census of the ED during this period was approximately 59,000 patients, of whom approximately 45,000 were over 17 years old.Eligible patients were over 17 years of age presenting with complaints of acute chest pain, abdominal pain, or any pain secondary to trauma. Patients with acute exacerbations of chronic pain were considered to have chronic pain and were not included. Exclusion criteria included an altered mental status, inability of the patient to speak English, suspected intoxication, refusal to participate, or clinical condition urgent enough to preclude the patient's participation in the study. Nursing staff made the decision that a patient's clinical condition precluded involvement in the study. Patients who were excluded on this basis were generally unstable and in need of immediate resuscitation. These patients could be enrolled after resuscitation at the discretion of the nursing staff.Measurements/Outcome Measures. Data were collected using standardized data sh...