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KMID : 1131320160180010057
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Journal of Korean Society of Computed Tomographic Technology
2016 Volume.18 No. 1 p.57 ~ p.63
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A Study for the Comparison and Evaluation of Ureteric Length Estimated Using Patients’ Height and Actual Ureteric Length Measured with a 3D Workstation
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Seong Dong-Chan
Lee Jeong-Beom
Kim Do-Yun
Bu Jae-Cheol
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Abstract
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Purpose : A stent placed for stricture or occlusion in the ureter causes various side effects. Most of the side effects are closely related to the length of the stent, and in order to mitigate such effects, it is important to measure ureteric length accurately and insert a stent of adequate length. In clinical situations, however, ureteric length is estimated commonly based on the patient’s height, and this method has a limitation in satisfying the required accuracy in comparison with individuals’ actual ureteric length. Thus, as an effort to improve the accuracy of ureteric length, this study measured patients’ ureteric length using MPR of MDCT and compared the measurement with ureteric length estimated with patients’ height as used in clinics.
Materials and method : This study was conducted from August 2014 to June 2015, and the subjects were 104 patients who had kidney CT and whose height was measured before the test. The patient’s ureteric length was measured with the vessel analysis function of ADW using the scan data at the five-minute delay phase of kidney CT, and it was compared with ureteric length estimated by the height-based method as used at K medical center.
Result : There was a significant difference between the standard of K medical center, which applied ureteric length 22cm for a height below 159.9cm, 24~26cm for 160.0~169.9cm, and 26~28cm for 170cm or taller, and ureteric length measured using ADW. When Pearson’ s correlation was analyzed for between patients’ height and ureteric length, which was not established.
Conclusion: As a research comparing the method of guessing the length of a ureter based on the present height and the method of actually measuring by using the 3D reconstruction of the ADW through the kidney CT scan data, it appeared that, in order to apply the stent that fits the length of the ureter of the patient, this research was a more accurate method than the previously existent methods. Also, it is thought that, if the appropriate stents can be applied according to the lengths of the ureters of the patients, this would prove to be of help in reducing the side effects that take place due to the lengths of the stents.
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KEYWORD
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ureteric length, stent, height, RP-UVJ, vessel analysis, kidney CT, 3D workstation
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