Three-dimensional evaluation of the coccyx movement between supine and standing positions using conventional and upright computed tomography imaging

Abstract Currently, no three-dimensional reference data exist for the normal coccyx in the standing position on computed tomography (CT); however, this information could have utility for evaluating patients with coccydynia and pelvic floor dysfunction. Thus, we aimed to compare coccygeal parameters...

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Autores principales:	Fumiko Yagi, Yoshitake Yamada, Minoru Yamada, Yoichi Yokoyama, Kiyoko Mukai, Takehiro Nakahara, Keiichi Narita, Masahiro Jinzaki
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7d262a1449244ad6bd1f748d4ee8ef97
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spelling	oai:doaj.org-article:7d262a1449244ad6bd1f748d4ee8ef972021-12-02T16:36:04ZThree-dimensional evaluation of the coccyx movement between supine and standing positions using conventional and upright computed tomography imaging10.1038/s41598-021-86312-02045-2322https://doaj.org/article/7d262a1449244ad6bd1f748d4ee8ef972021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86312-0https://doaj.org/toc/2045-2322Abstract Currently, no three-dimensional reference data exist for the normal coccyx in the standing position on computed tomography (CT); however, this information could have utility for evaluating patients with coccydynia and pelvic floor dysfunction. Thus, we aimed to compare coccygeal parameters in the standing versus supine positions using upright and supine CT and evaluate the effects of sex, age, and body mass index (BMI) on coccygeal movement. Thirty-two healthy volunteers underwent both upright (standing position) and conventional (supine position) CT examinations. In the standing position, the coccyx became significantly longer and straighter, with the tip of the coccyx moving backward and downward (all p < 0.001). Additionally, the coccygeal straight length (standing/supine, 37.8 ± 7.1/35.7 ± 7.0 mm) and sacrococcygeal straight length (standing/supine, 131.7 ± 11.2/125.0 ± 10.7 mm) were significantly longer in the standing position. The sacrococcygeal angle (standing/supine, 115.0 ± 10.6/105.0 ± 12.5°) was significantly larger, while the lumbosacral angle (standing/supine, 21.1 ± 5.9/25.0 ± 4.9°) was significantly smaller. The migration length of the tip of the coccyx (mean, 7.9 mm) exhibited a moderate correlation with BMI (r = 0.42, p = 0.0163). Our results may provide important clues regarding the pathogenesis of coccydynia and pelvic floor dysfunction.Fumiko YagiYoshitake YamadaMinoru YamadaYoichi YokoyamaKiyoko MukaiTakehiro NakaharaKeiichi NaritaMasahiro JinzakiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Fumiko Yagi Yoshitake Yamada Minoru Yamada Yoichi Yokoyama Kiyoko Mukai Takehiro Nakahara Keiichi Narita Masahiro Jinzaki Three-dimensional evaluation of the coccyx movement between supine and standing positions using conventional and upright computed tomography imaging
description	Abstract Currently, no three-dimensional reference data exist for the normal coccyx in the standing position on computed tomography (CT); however, this information could have utility for evaluating patients with coccydynia and pelvic floor dysfunction. Thus, we aimed to compare coccygeal parameters in the standing versus supine positions using upright and supine CT and evaluate the effects of sex, age, and body mass index (BMI) on coccygeal movement. Thirty-two healthy volunteers underwent both upright (standing position) and conventional (supine position) CT examinations. In the standing position, the coccyx became significantly longer and straighter, with the tip of the coccyx moving backward and downward (all p < 0.001). Additionally, the coccygeal straight length (standing/supine, 37.8 ± 7.1/35.7 ± 7.0 mm) and sacrococcygeal straight length (standing/supine, 131.7 ± 11.2/125.0 ± 10.7 mm) were significantly longer in the standing position. The sacrococcygeal angle (standing/supine, 115.0 ± 10.6/105.0 ± 12.5°) was significantly larger, while the lumbosacral angle (standing/supine, 21.1 ± 5.9/25.0 ± 4.9°) was significantly smaller. The migration length of the tip of the coccyx (mean, 7.9 mm) exhibited a moderate correlation with BMI (r = 0.42, p = 0.0163). Our results may provide important clues regarding the pathogenesis of coccydynia and pelvic floor dysfunction.
format	article
author	Fumiko Yagi Yoshitake Yamada Minoru Yamada Yoichi Yokoyama Kiyoko Mukai Takehiro Nakahara Keiichi Narita Masahiro Jinzaki
author_facet	Fumiko Yagi Yoshitake Yamada Minoru Yamada Yoichi Yokoyama Kiyoko Mukai Takehiro Nakahara Keiichi Narita Masahiro Jinzaki
author_sort	Fumiko Yagi
title	Three-dimensional evaluation of the coccyx movement between supine and standing positions using conventional and upright computed tomography imaging
title_short	Three-dimensional evaluation of the coccyx movement between supine and standing positions using conventional and upright computed tomography imaging
title_full	Three-dimensional evaluation of the coccyx movement between supine and standing positions using conventional and upright computed tomography imaging
title_fullStr	Three-dimensional evaluation of the coccyx movement between supine and standing positions using conventional and upright computed tomography imaging
title_full_unstemmed	Three-dimensional evaluation of the coccyx movement between supine and standing positions using conventional and upright computed tomography imaging
title_sort	three-dimensional evaluation of the coccyx movement between supine and standing positions using conventional and upright computed tomography imaging
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/7d262a1449244ad6bd1f748d4ee8ef97
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Three-dimensional evaluation of the coccyx movement between supine and standing positions using conventional and upright computed tomography imaging

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