Determinants of radiation dose during right transradial access: Insights from the RAD-MATRIX study.

Sciahbasi, Alessandro; Frigoli, Enrico; Sarandrea, Alessandro; Calabrò, Paolo; Rubartelli, Paolo; Cortese, Bernardo; Tomassini, Francesco; Zavalloni, Dennis; Tebaldi, Matteo; Calabria, Paolo; Rigattieri, Stefano; Zingarelli, Antonio; Sardella, Gennaro; Lupi, Alessandro; Rothenbühler, Martina; Heg, Dik; Valgimigli, Marco (2018). Determinants of radiation dose during right transradial access: Insights from the RAD-MATRIX study. American Heart Journal, 196, pp. 113-118. Elsevier 10.1016/j.ahj.2017.10.014

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The RAD-MATRIX trial reported a large operator radiation exposure variability in right radial percutaneous coronary procedures. The reasons of these differences are not well understood. Our aim was to appraise the determinants of operator radiation exposure during coronary right transradial procedures.


Patient arrangement during transradial intervention was investigated across operators involved in the RAD-MATRIX trial. Operator radiation exposure was analyzed according to the position of the patient right arm (close or far from the body) and in relation to the size of the upper leaded glass.


Among the 14 operators who agreed to participate, there was a greater than 10-fold difference in radiation dose at thorax level (from 21.5 to 267 μSv) that persisted after normalization by dose-area product (from 0.35 to 3.5 μSv/Gy*cm). Among the operators who positioned the instrumented right arm far from the body (110.4 μSv, interquartile range 71.5-146.5 μSv), thorax dose was greater than that in those who placed the instrumented arm close to the right leg (46.1 μSv, 31.3-56.8 μSv, P = .02). This difference persisted after normalization by dose-area product (P = .028). The use of a smaller full glass shield was also associated with a higher radiation exposure compared with a larger composite shield (147.5 and 60 μSv, respectively, P = .016).


In the context of the biggest radiation study conducted in patients undergoing transradial catheterization, the instrumented right arm arrangement close to the leg and greater upper leaded shield dimensions were associated with a lower operator radiation exposure. Our findings emphasize the importance of implementing simple preventive measures to mitigate the extra risks of radiation exposure with right radial as compared with femoral access.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Cardiovascular Disorders (DHGE) > Clinic of Cardiology
04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Social and Preventive Medicine (ISPM)
04 Faculty of Medicine > Pre-clinic Human Medicine > Department of Clinical Research (DCR)

UniBE Contributor:

Rothenbühler, Martina, Heg, Dierik Hans, Valgimigli, Marco


600 Technology > 610 Medicine & health
300 Social sciences, sociology & anthropology > 360 Social problems & social services








Tanya Karrer

Date Deposited:

27 Feb 2018 14:25

Last Modified:

20 Feb 2024 14:16

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