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Radiation exposure to operating room personnel and patients during endovascular procedures.
J Vasc Surg. 2013 Sep; 58(3):702-9.JV

Abstract

OBJECTIVE

To characterize radiation exposure to patients and operating room personnel during fluoroscopic procedures.

METHODS

Patient dose information was collected from the imaging equipment. Real-time dosimetry was used to measure doses to the operators, scrub nurse, radiologic technologist (RT), and anesthesiologist in 39 cases of endovascular thoracoabdominal aortic aneurysm repair using fenestrated endografts. Overall equivalent doses and dose rates at time points of interest were noted and compared with the corresponding patient doses.

RESULTS

The dosimeter on the anesthesia equipment received 143 μSv (38-247) more radiation per case than the average operator, and the scrub nurse and RT received 106 μSv (66-146) and 100 μSv (55-145) less, respectively. Adjusting for protective lead aprons by the Webster methodology, the average operator received an effective dose of 38 μSv. Except for the RT, personnel doses were well correlated with patient dose as measured by kerma area product (KAP) (r = .82 for average operator, r = .85 for scrub nurse, and r = .86 for anesthesia; all P < .001) but less well correlated with fluoroscopy time or cumulative air kerma (CAK). When preoperative cone beam computed tomography was performed, the equivalent dose to the RT was 1.1 μSv (0.6-1.5) when using shielding and 37 μSv (22-53) when unshielded. Digital subtraction acquisitions accounted for a large fraction of all individuals' doses. Decreasing field size (and thus, increasing magnification) was associated with decreased KAP (r = .47; P < .001) and increased CAK (r = -.56; P < .001). The square of the field size correlated strongly with the KAP/CAK ratio (r = .99; P < .001). Increased lateral angulation of the C-arm increased both CAK and KAP (at field size, 22 cm; r = .54 and r = .44; both P < .001) and the average dose rate to an operator was 1.78 (1.37-2.31) times as high in a lateral projection as in a posterior-anterior projection.

CONCLUSIONS

Personnel doses were best correlated with KAP and less well correlated with fluoroscopy time or CAK. The dosimeter on the anesthesia equipment recorded the highest doses attributable to ineffective shielding. Operators can reduce the effective dose to themselves, the patient, and other personnel by minimizing the use of digital subtraction acquisitions, avoiding lateral angulation, using higher magnification levels when possible, and being diligent about the use of shielding during fluoroscopy cases.

Authors+Show Affiliations

School of Medicine, Case Western Reserve University, Cleveland, Ohio, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
Journal Article

Language

eng

PubMed ID

23810300

Citation

Mohapatra, Abhisekh, et al. "Radiation Exposure to Operating Room Personnel and Patients During Endovascular Procedures." Journal of Vascular Surgery, vol. 58, no. 3, 2013, pp. 702-9.
Mohapatra A, Greenberg RK, Mastracci TM, et al. Radiation exposure to operating room personnel and patients during endovascular procedures. J Vasc Surg. 2013;58(3):702-9.
Mohapatra, A., Greenberg, R. K., Mastracci, T. M., Eagleton, M. J., & Thornsberry, B. (2013). Radiation exposure to operating room personnel and patients during endovascular procedures. Journal of Vascular Surgery, 58(3), 702-9. https://doi.org/10.1016/j.jvs.2013.02.032
Mohapatra A, et al. Radiation Exposure to Operating Room Personnel and Patients During Endovascular Procedures. J Vasc Surg. 2013;58(3):702-9. PubMed PMID: 23810300.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Radiation exposure to operating room personnel and patients during endovascular procedures. AU - Mohapatra,Abhisekh, AU - Greenberg,Roy K, AU - Mastracci,Tara M, AU - Eagleton,Matthew J, AU - Thornsberry,Brett, Y1 - 2013/06/28/ PY - 2012/10/09/received PY - 2013/02/12/revised PY - 2013/02/14/accepted PY - 2013/7/2/entrez PY - 2013/7/3/pubmed PY - 2013/10/29/medline SP - 702 EP - 9 JF - Journal of vascular surgery JO - J. Vasc. Surg. VL - 58 IS - 3 N2 - OBJECTIVE: To characterize radiation exposure to patients and operating room personnel during fluoroscopic procedures. METHODS: Patient dose information was collected from the imaging equipment. Real-time dosimetry was used to measure doses to the operators, scrub nurse, radiologic technologist (RT), and anesthesiologist in 39 cases of endovascular thoracoabdominal aortic aneurysm repair using fenestrated endografts. Overall equivalent doses and dose rates at time points of interest were noted and compared with the corresponding patient doses. RESULTS: The dosimeter on the anesthesia equipment received 143 μSv (38-247) more radiation per case than the average operator, and the scrub nurse and RT received 106 μSv (66-146) and 100 μSv (55-145) less, respectively. Adjusting for protective lead aprons by the Webster methodology, the average operator received an effective dose of 38 μSv. Except for the RT, personnel doses were well correlated with patient dose as measured by kerma area product (KAP) (r = .82 for average operator, r = .85 for scrub nurse, and r = .86 for anesthesia; all P < .001) but less well correlated with fluoroscopy time or cumulative air kerma (CAK). When preoperative cone beam computed tomography was performed, the equivalent dose to the RT was 1.1 μSv (0.6-1.5) when using shielding and 37 μSv (22-53) when unshielded. Digital subtraction acquisitions accounted for a large fraction of all individuals' doses. Decreasing field size (and thus, increasing magnification) was associated with decreased KAP (r = .47; P < .001) and increased CAK (r = -.56; P < .001). The square of the field size correlated strongly with the KAP/CAK ratio (r = .99; P < .001). Increased lateral angulation of the C-arm increased both CAK and KAP (at field size, 22 cm; r = .54 and r = .44; both P < .001) and the average dose rate to an operator was 1.78 (1.37-2.31) times as high in a lateral projection as in a posterior-anterior projection. CONCLUSIONS: Personnel doses were best correlated with KAP and less well correlated with fluoroscopy time or CAK. The dosimeter on the anesthesia equipment recorded the highest doses attributable to ineffective shielding. Operators can reduce the effective dose to themselves, the patient, and other personnel by minimizing the use of digital subtraction acquisitions, avoiding lateral angulation, using higher magnification levels when possible, and being diligent about the use of shielding during fluoroscopy cases. SN - 1097-6809 UR - https://www.unboundmedicine.com/medline/citation/23810300/Radiation_exposure_to_operating_room_personnel_and_patients_during_endovascular_procedures_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0741-5214(13)00330-3 DB - PRIME DP - Unbound Medicine ER -