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KMID : 1149020190210020061
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Journal of Korean Society of Computed Tomographic Technology
2019 Volume.21 No. 2 p.61 ~ p.66
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A Study on Patient Breathing Technique during Pulmonary Artery Embolism CT
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Choi Eun-Yeong
Kim Myeong-Jin
Kim Hyung-Tae
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Abstract
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Purpose: The advance of MDCT(multi detector computed tomography) shortened examination time, greatly contributing to the diagnosis of PAE(pulmonary artery embolism). This study intends to contribute to more precise CT scanning of PAE by comparing two methods of patients' breathing: holding breath after inhaling(valsalva manoeuvre) and holding breath without inhaling(shallow breathing).
Method: The gender and age-blind study targeted 65 patients who came in for PAE CT scanning from Jan to Sept, 2018. Aquilion One was selected as CT scanning equipment. The measuring mode was set to ascending aorta and pulmonary Artery, and scanning was conducted three times for each with the average ROI being 50-60mm2.
Result: The ascending aorta HU value for people below 60 is 355.0 and the value for people aged 60 or above is 365.1, showing no statically significant difference. The pulmonary artery HU value, on the contrary, showed a statically significant difference(356.9 for people below 60 and 437.3 for people aged 60 or above). Breathing did not result in a statically significant difference for the HU value of ascending aorta(Valsalva Manoeuvre: 362.7 and Shallow Breathing: 361.8). However, there was a statistically significant difference for the HU value of pulmonary artery(valsalva manoeuvre: 387.8 and shallow breathing: 441.6).
Conclusion: The result showed that, for PAE CT scanning, shallow breathing is better than valsalva manoeuvre. And iving young patients thorough instructions on shallow breathing should be helpful.
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KEYWORD
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Pulmonary Artery Embolism, Breath Method, Valsalva Manoeuvre
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