In vivo impact tests assuming human–robot contact to evaluate soft tissue bruise injury tolerance
In this study, we performed in vivo impact experiments emulating physical contact between humans and personal care robots and evaluated the conditions resulting in bruise injury due to subcutaneous hemorrhage and injury resistance. Anesthetized live pigs were used as alternate specimens, and the exp...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2022-11-01
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| Series: | Mechanical Engineering Journal |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/mej/9/6/9_22-00153/_pdf/-char/en |
| _version_ | 1811200403780403200 |
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| author | Ryuji SUGIURA Sho IKARASHI Daiki SUZUKI Sentaro TERAKADO Tatsuo FUJIKAWA Rie NISHIKATA Tetsuya NISHIMOTO |
| author_facet | Ryuji SUGIURA Sho IKARASHI Daiki SUZUKI Sentaro TERAKADO Tatsuo FUJIKAWA Rie NISHIKATA Tetsuya NISHIMOTO |
| author_sort | Ryuji SUGIURA |
| collection | DOAJ |
| description | In this study, we performed in vivo impact experiments emulating physical contact between humans and personal care robots and evaluated the conditions resulting in bruise injury due to subcutaneous hemorrhage and injury resistance. Anesthetized live pigs were used as alternate specimens, and the experiments were performed using a self-made free-fall impact tester. We investigated the existence of subcutaneous hemorrhage and performed its quantitative evaluation by hematoxylin and eosin (HE) staining of soft tissue samples at the site of the impact load. The results showed that bleeding, adopted as the indicator of bruise injury, occurred when the total energy transferred (an index of injury resistance) was 46.8 kJ/m2. Further, when the net energy transferred was used as the injury resistance evaluation index, the threshold value for bleeding was 30.3 kJ/m2. When the maximum stress was used as the injury resistance evaluation index, the threshold value for bleeding was 1.14 MPa. To investigate the possibility of adopting the injury resistance threshold of the alternate specimens obtained in this study as the injury resistance threshold of humans, we studied the capillary bleeding resistances of the test specimens experimentally. We compared these values with the capillary resistance of humans and examined the bleeding capillaries’ fragility. |
| first_indexed | 2024-04-12T02:02:55Z |
| format | Article |
| id | doaj.art-e3316e19e5e34329904e89f0c9fcc283 |
| institution | Directory Open Access Journal |
| issn | 2187-9745 |
| language | English |
| last_indexed | 2024-04-12T02:02:55Z |
| publishDate | 2022-11-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Mechanical Engineering Journal |
| spelling | doaj.art-e3316e19e5e34329904e89f0c9fcc2832022-12-22T03:52:37ZengThe Japan Society of Mechanical EngineersMechanical Engineering Journal2187-97452022-11-019622-0015322-0015310.1299/mej.22-00153mejIn vivo impact tests assuming human–robot contact to evaluate soft tissue bruise injury toleranceRyuji SUGIURA0Sho IKARASHI1Daiki SUZUKI2Sentaro TERAKADO3Tatsuo FUJIKAWA4Rie NISHIKATA5Tetsuya NISHIMOTO6Department of Mechanical Engineering, Nihon UniversityDepartment of Mechanical Engineering, Nihon UniversityDepartment of Mechanical Engineering, Nihon UniversityDepartment of Mechanical Engineering, Nihon UniversityDepartment of Mechanical System Engineering, Nagoya UniversityDepartment of Forensic Medicine, Fukushima Medical UniversityDepartment of Mechanical Engineering, Nihon UniversityIn this study, we performed in vivo impact experiments emulating physical contact between humans and personal care robots and evaluated the conditions resulting in bruise injury due to subcutaneous hemorrhage and injury resistance. Anesthetized live pigs were used as alternate specimens, and the experiments were performed using a self-made free-fall impact tester. We investigated the existence of subcutaneous hemorrhage and performed its quantitative evaluation by hematoxylin and eosin (HE) staining of soft tissue samples at the site of the impact load. The results showed that bleeding, adopted as the indicator of bruise injury, occurred when the total energy transferred (an index of injury resistance) was 46.8 kJ/m2. Further, when the net energy transferred was used as the injury resistance evaluation index, the threshold value for bleeding was 30.3 kJ/m2. When the maximum stress was used as the injury resistance evaluation index, the threshold value for bleeding was 1.14 MPa. To investigate the possibility of adopting the injury resistance threshold of the alternate specimens obtained in this study as the injury resistance threshold of humans, we studied the capillary bleeding resistances of the test specimens experimentally. We compared these values with the capillary resistance of humans and examined the bleeding capillaries’ fragility.https://www.jstage.jst.go.jp/article/mej/9/6/9_22-00153/_pdf/-char/enpersonal care robotbruise injury tolerancebleeding thresholdin vivoimpact testinjury indexsoft tissue |
| spellingShingle | Ryuji SUGIURA Sho IKARASHI Daiki SUZUKI Sentaro TERAKADO Tatsuo FUJIKAWA Rie NISHIKATA Tetsuya NISHIMOTO In vivo impact tests assuming human–robot contact to evaluate soft tissue bruise injury tolerance Mechanical Engineering Journal personal care robot bruise injury tolerance bleeding threshold in vivo impact test injury index soft tissue |
| title | In vivo impact tests assuming human–robot contact to evaluate soft tissue bruise injury tolerance |
| title_full | In vivo impact tests assuming human–robot contact to evaluate soft tissue bruise injury tolerance |
| title_fullStr | In vivo impact tests assuming human–robot contact to evaluate soft tissue bruise injury tolerance |
| title_full_unstemmed | In vivo impact tests assuming human–robot contact to evaluate soft tissue bruise injury tolerance |
| title_short | In vivo impact tests assuming human–robot contact to evaluate soft tissue bruise injury tolerance |
| title_sort | in vivo impact tests assuming human robot contact to evaluate soft tissue bruise injury tolerance |
| topic | personal care robot bruise injury tolerance bleeding threshold in vivo impact test injury index soft tissue |
| url | https://www.jstage.jst.go.jp/article/mej/9/6/9_22-00153/_pdf/-char/en |
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