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Patient dose related to the complexity of interventional cardiology procedures
R Padovani1, G Bernardi, M R Malisan
1Osp. S. Maria della Misericordia, Udine, Italy. renatopadovani@tin.it
Insights
Percutaneous transluminal coronary angioplasty (PTCA) procedures in interventional cardiology pose high radiation doses. Procedure complexity significantly impacts patient radiation exposure, highlighting the need for enhanced radiation protection measures.
Area of Science:
- Interventional Cardiology
- Medical Physics
- Radiation Protection
Background:
- Percutaneous transluminal coronary angioplasty (PTCA) is a frequent interventional cardiology procedure associated with high patient radiation doses.
- Cardiologists often lack sufficient knowledge of radiation physics and protection, despite its paramount importance.
Purpose of the Study:
- To investigate the correlation between PTCA procedure complexity and radiation exposure parameters.
- To identify factors influencing radiation dose in PTCA and establish a complexity index for dose assessment.
Main Methods:
- Analysis of irradiation parameters including fluoroscopy time, number of images, and dose-area product (DAP).
- Correlation of these parameters with technical factors like severe tortuosity and chronic occlusions.
- Development of a complexity index to categorize PTCA procedures into simple, medium, and complex groups.
Main Results:
- Fluoroscopy time showed a stronger correlation with technical factors than DAP.
- DAP is influenced by patient size, collimation, operation modes, and X-ray beam orientation.
- A complexity index effectively differentiated patient doses across simple, medium, and complex PTCA procedures.
Conclusions:
- PTCA procedure complexity is a significant determinant of patient radiation dose.
- Understanding factors influencing fluoroscopy time and DAP is crucial for optimizing radiation protection in interventional cardiology.
- A validated complexity index can aid in managing and reducing radiation exposure during PTCA.
Abstract:
In interventional cardiology (IC) the PTCA (percutaneous transluminal coronary angioplasty) procedure is the most frequent procedure with the highest dose to the patient. The procedure is usually performed by cardiologists having, in general, insufficient knowledge of radiation physics, radiation technology and radiation protection. The need for radiation protection is of paramount importance in this field of interventional radiology. Correlation between the complexity of PTCA procedure and irradiation parameters (fluoroscopy time, number of images and dose-area product--DAP) has been demonstrated. The presence of severe tortuosity and occlusion of > or = 3 months play a major role. Fluoroscopy time is better correlated with technical factors than DAP, which also includes the influence of patient size, collimation, operation modes, and X ray beam orientation. The number of acquired images is less correlated with the complexity of the PTCA procedure. A complexity index was conceived and procedures were divided into three groups, defined as: simple, medium and complex, which were significantly different in terms of patient dose.