Effectiveness of Low Rate Fluoroscopy at Reducing Operator and Patient Radiation Dose During Transradial Coronary Angiography and Interventions

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• 作者：Eltigani Abdelaal ; MD^&lowast ; ; Guillaume Plourde ; MS^&lowast ; ; Jimmy MacHaalany ; MD^&lowast ; ; Jean Arsenault ; Eng ; MScA^&lowast ; ; Goran Rimac ; MS^&lowast ; ; Jean-Pierre Dé ; ry ; MD^&lowast ; ; Gé ; rald Barbeau ; MD^&lowast ; ; Eric Larose ; MD^&lowast ; ; Robert De Larochelliè ; re ; MD^&lowast ; ; Can M. Nguyen ; MD^&lowast ; ; Ricardo Allende ; MD^&lowast ; ; Henrique Ribeiro ; MD^&lowast ; ; Olivier Costerousse ; PhD^&lowast ; ; Rosaire Mongrain ; Eng ; PhD^&dagger ; ; Olivier F. Bertrand ; MD ; PhD^&lowast ; ; ^&dagger ; ; ^{olivier.bertrand@crhl.ulaval.ca" class="auth_mail} ; for the Interventional Cardiologists at Quebec Heart-Lung Institute
• 关键词：dosimetry ; imaging ; percutaneous coronary intervention ; radiation ; transradial
• 刊名：JACC: Cardiovascular Interventions
• 出版年：May 2014
• 年：2014
• 卷：7
• 期：5
• 页码：567-574
• 全文大小：689 K

文摘

This study sought to determine the efficacy of low rate fluoroscopy at 7.5 frames/s (FPS) versus conventional 15 FPS for reduction of operator and patient radiation dose during diagnostic coronary angiography (DCA) and percutaneous coronary intervention (PCI) via the transradial approach (TRA).

Background

TRA for cardiac catheterization is potentially associated with increased radiation exposure. Low rate fluoroscopy has the potential to reduce radiation exposure.

Methods

Patients undergoing TRA diagnostic angiography ± ad-hoc PCI were randomized to fluoroscopy at 7.5 FPS versus 15 FPS prior to the procedure. Both 7.5 and 15 FPS fluoroscopy protocols were configured with a fixed dose per pulse of 40 nGy. Primary endpoints were operator radiation dose (measured with dosimeter attached to the left side of the thyroid shield in 渭Sievert [渭Sv]), patient radiation dose (expressed as dose-area product in Gy·cm²), and fluoroscopy time.

Results

From October 1, 2012 to August 30, 2013, from a total of 363 patients, 184 underwent DCA and 179 underwent PCI. Overall, fluoroscopy at 7.5 FPS compared with 15 FPS was associated with a significant reduction in operator dose (30% relative reduction [RR], p < 0.0001); and in patient's dose-area product (19% RR; p = 0.022). When stratified by procedure type, 7.5 FPS compared with 15 FPS was associated with significant reduction in operator dose during both DCA (40% RR; p < 0.0001) and PCI (28% RR; p = 0.0011). Fluoroscopy at 7.5 FPS, compared with 15 FPS, was also associated with substantial reduction in patients' dose-area product during DCA (26% RR; p = 0.0018) and during PCI (19% RR; p = 0.13). Fluoroscopy time was similar in 7.5 FPS and 15 FPS groups for DCA (3.4 ± 2.0 min vs. 4.0 ± 4.7 min; p = 0.42) and PCI (11.9 ± 8.4 min vs. 13.3 ± 9.7 min; p = 0.57), respectively.

Conclusions

Fluoroscopy at 7.5 FPS, compared with 15 FPS, is a simple and effective method in reducing operator and patient radiation dose during TRA DCA and PCI.