Details

Autor(en) / Beteiligte

• Mehlman, Charles T
• DiPasquale, Thomas G

Titel

Radiation Exposure to the Orthopaedic Surgical Team During Fluoroscopy: "How Far Away Is Far Enough?"

Ist Teil von

• Journal of orthopaedic trauma, 1997-08, Vol.11 (6), p.392-398

Ort / Verlag

Hagerstown, MD: Lippincott-Raven Publishers

Erscheinungsjahr

1997

Quelle

MEDLINE

Beschreibungen/Notizen

• OBJECTIVES:To correlate the amount of radiation exposure to members of the orthopaedic surgical team based on their relative positions during a simulated fluoroscopically assisted orthopaedic procedure. DESIGN:Experimental study using commercially available fluoroscopic units and dosimetry badges designed to measure "eye" (ocular lens), "shallow" (hands/skin), and "deep" (whole-body) radiation exposure. SETTING:Standard hospital operating room at a level one trauma center. PARTICIPANTS:Dosimetry badge clusters at specified distances from a fluoroscopic x-ray beam. Represented positions were direct beam contact, surgeon (12 in/30.5 cm), first assistant (24 in/70 cm), scrub nurse (36 in/91.4 cm), and anesthesiologist (60 in/152.4 cm). INTERVENTION:Dosimetry badges were systematically exposed by a protocol intended to maximize radiation scatter. A maximum time for continuous fluoroscope use was set at ten minutes. MAIN OUTCOME MEASUREMENTS:Radiation exposure readings from dosimetry badges processed by a commercially available dosimetry service. RESULTS:Maximum readings are reported. Direct beam contact resulted in approximately 4000 mrem/minute (40 mSv/min) of radiation exposure. Deep exposure for the surgeon and first assistant was 20 mrem/min (0.2 mSv/min) and 6 mrem/min (0.06 mSv/min), respectively. Superficial exposure was 29 mrem/min (0.29 mSv/min) for the surgeon and 10 mrem/min (0.1 mSv/min) for the first assistant. Eye exposure was 10 mrem/min (0.1 mSv/min) for the surgeon and 6 mrem/min (0.06 mSv/min) for the first assistant. At the scrub nurse position, no deep or eye exposure was detected. One positive badge for shallow exposure was noted at the scrub nurse position, reflecting a 2 mrem/min (0.02 mSv/min) exposure rate. After ten minutes of continuous exposure, badges assigned to the anesthesiologist position never registered any positive readings. CONCLUSIONS:These results indicate that unprotected individuals working twenty-four inches (70 cm) or less from a fluoroscopic beam receive significant amounts of radiation, whereas those working thirty-six inches (91.4 cm) or greater from the beam receive an extremely low amount of radiation.