Radiation Protection Dosimetry Advance Access originally published online on February 3, 2006
Radiation Protection Dosimetry 2005 117(1-3):54-58; doi:10.1093/rpd/nci719
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Reference levels in PTCA as a function of procedure complexity
1 Dipartimento di Fisica, Università di Trieste, Via Valerio 2, 34100 Trieste, Italy
2 Azienda Ospedaliera S. Maria della Misericordia, 33100 Udine, Italy
3 Regional Medical Physics Department, Newcastle General Hospital, Newcastle Upon Tyne NE4 6BE, UK
4 Medical Physics and Bioengineering Department, Saint James's Hospital, Dublin 8, Ireland
* Corresponding author: angela.peterzol{at}insa-lyon.fr
The multicentre assessment of a procedure complexity index (CI) for the introduction of reference levels (RLs) in percutaneous transluminal coronary angioplasties (PTCA) is presented here. PTCAs were investigated based on methodology proposed by Bernardi et al. Multiple linear stepwise regression analysis, including clinical, anatomical and technical factors, was performed to obtain fluoroscopy time predictors. Based on these regression coefficients, a scoring system was defined and CI obtained. CI was used to classify dose values into three groups: low, medium and high complexity procedures, since there was good correlation (r = 0.41; P < 0.001) between dosearea product (DAP) and CI. CI groups were determined by an ANOVA test, and the resulting DAP and fluoroscopy time third quartiles suggested as preliminary RLs in PTCA, as a function of procedure complexity. PTCA preliminary RLs for DAP are 54, 76 and 127 Gy cm2, and 12, 20 and 27 min for fluoroscopy time, for the three CI groups.
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