caa a22 4500 477079903 CHVBK 20180405111447.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF01507778 doi (NATIONALLICENCE)springer-10.1007/BF01507778 Results of ventilation-perfusion scans: Emergency department patients with and without risk factors [Elektronische Daten] [Alexander Boutselis, Wendy Hanafee, Thomas Parker, Michael Sutherland, Said Zu'bi] We prospectively studied 141 of 143 consecutive patients over a 6-month period referred for a ventilation-perfusion ( $$\dot V/\dot Q$$ ) scan from the emergency department of an 800-bed university-affiliated teaching hospital. Numerous clinical, laboratory, and radiographic data were analyzed. Our hypothesis was that performing a $$\dot V/\dot Q$$ scan in a patient without a risk factor for pulmonary embolus (PE) is of little value. Of the 141 patients, 81 (57%) had no known risk factors for PE, and 60 (43%) had one or more risk factors for PE. Of those patients without risk factors, none had a highprobability scan, one patient (1%) had an intermediate-probability scan, 49 (61%) had a low-probability scan, and 31 (38%) had a very-low probability or normal scan. Of those patients with risk factors, nine (15%) had a high-probability scan, seven (12%) had an intermediate-probability scan, 26 (43%) had a low-probability scan, 17 (28%) had a very-low-probability or normal scan, and one (2%) had evidence of unchanged chronic PE. Risk factors and $$\dot V/\dot Q$$ scan interpretations are significantly related. Eleven (8%) of the 141 patients were discharged with a diagnosis of PE. All of these patients had at least one risk factor for PE. Risk factors were the only discriminating criteria for PE in our patient population. Although a small study such as ours cannot be used to make broad decisions on $$\dot V/\dot Q$$ scan ordering practices, our findings suggest that ordering a $$\dot V/\dot Q$$ scan in a patient without a risk factor for PE is of little value. American Society of Emergency Radiology, 1996 Boutselis Alexander Division of Diagnostic Radiology, Baystate Medical Center, 759 Chestnur Street, 01199, Springfield, Massachusetts aut Hanafee Wendy Division of Diagnostic Radiology, Baystate Medical Center, 759 Chestnur Street, 01199, Springfield, Massachusetts aut Parker Thomas Division of Diagnostic Radiology, Baystate Medical Center, 759 Chestnur Street, 01199, Springfield, Massachusetts aut Sutherland Michael Division of Nuclear Medicine, Baystate Medical Center, Springfield, Massachusetts aut Zu'bi Said Statistical Consulting Center, University of Massachusetts, Amherst, Massachusetts aut Emergency Radiology Springer-Verlag 3/5(1996-09-01), 221-224 1070-3004 3:5<221 1996 3 10140 https://doi.org/10.1007/BF01507778 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01507778 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Boutselis Alexander Division of Diagnostic Radiology, Baystate Medical Center, 759 Chestnur Street, 01199, Springfield, Massachusetts aut NATIONALLICENCE 700 1- Hanafee Wendy Division of Diagnostic Radiology, Baystate Medical Center, 759 Chestnur Street, 01199, Springfield, Massachusetts aut NATIONALLICENCE 700 1- Parker Thomas Division of Diagnostic Radiology, Baystate Medical Center, 759 Chestnur Street, 01199, Springfield, Massachusetts aut NATIONALLICENCE 700 1- Sutherland Michael Division of Nuclear Medicine, Baystate Medical Center, Springfield, Massachusetts aut NATIONALLICENCE 700 1- Zu'bi Said Statistical Consulting Center, University of Massachusetts, Amherst, Massachusetts aut NATIONALLICENCE 773 0- Emergency Radiology Springer-Verlag 3/5(1996-09-01), 221-224 1070-3004 3:5<221 1996 3 10140 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer