研究者業績
基本情報
- 所属
- 日本獣医生命科学大学 獣医学部 獣医学科 教授 (小動物外科設立専門医)獣医外科学研究室 教授
- 学位
- 獣医学修士(日本獣医生命科学大学)獣医学博士(日本獣医生命科学大学)
- J-GLOBAL ID
- 200901007028918014
- researchmap会員ID
- 1000093611
経歴
8-
2011年4月 - 現在
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2002年 - 2011年
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1997年 - 2002年
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1997年 - 2002年
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1990年 - 1997年
学歴
4-
- 1990年
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- 1990年
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- 1987年
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- 1987年
委員歴
4-
2015年 - 現在
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1998年 - 現在
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1993年
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1992年
受賞
8論文
150-
Veterinary and comparative orthopaedics and traumatology : V.C.O.T 2024年3月6日OBJECTIVE: The aim of this study was to evaluate the stress changes in the radii beneath the locking plates (LP) of dogs implanted with LP using finite element analysis (FEA). STUDY DESIGN: The study included radii harvested from eight dogs. After computed tomography (CT) scans of the forelimb, the articular surface of the radius was fixed using resin. Material tests were conducted to identify the yield and fracture points and for verification with FEA. The CT data of the radius were imported into FEA software. The radii were classified into three groups based on the placement of the LP (nonplate placement, intact group; 1 mm above the radial surface, LP + 1 mm group; 3 mm above the radial surface, LP + 3 mm group). Equivalent, maximum, and minimum principal stresses and minimum principal strain were measured after FEA at the radial diaphysis beneath the plate. RESULTS: In shell elements, the LP + 1 mm and LP + 3 mm groups showed a significantly lower maximum principal stress compared with the intact group. In solid elements, the LP + 1 mm and LP + 3 mm groups showed a significantly higher equivalent stress and a significantly lower maximum principal stress compared with the intact group. CONCLUSION: When an axial load is applied to the radius, LP placement reduces the tension stress on the cortical bone of the radius beneath the plate, possibly related to implant-induced osteoporosis and bone formation in the cortical bone beneath the plate.
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BMC Veterinary Research 20(1) 2024年2月24日Abstract Background Cranial closing wedge osteotomy (CCWO) is a functional stabilisation technique for cranial cruciate ligament (CrCL) ruptures. This biomechanical study aimed to evaluate the influence of CCWO on the stability of the stifle joint. Eighteen Beagle stifle joints were divided into two groups: control and CCWO. The stifle joints were analyzed using a six-degree-of-freedom robotic joint biomechanical testing system. The joints were subjected to 30 N in the craniocaudal (CrCd) drawer and proximal compression tests and 1 Nm in the internal–external (IE) rotation test. Each test was performed with an extension position, 135°, and 120° of joint angle. Results The stifle joints were tested while the CrCLs were intact and then transected. In the drawer test, the CCWO procedure, CrCL transection, and stifle joint flexion increased CrCd displacement. The CCWO procedure and CrCL transection showed an interaction effect. In the compression test, the CCWO procedure decreased and CrCL transection and stifle joint flexion increased displacement. In the IE rotation test, CCWO, CrCL transection, and stifle joint flexion increased the range of motion. Conclusions CCWO was expected to provide stability against compressive force but does not contribute to stability in the drawer or rotational tests. In the CCWO-treated stifle joint, instability during the drawer test worsened with CrCL transection. In other words, performing the CCWO procedure when the CrCL function is present is desirable for stabilizing the stifle joint.
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Journal of Veterinary Medical Science 2024年
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American Journal of Veterinary Research 1-8 2023年9月5日Abstract OBJECTIVE To verify the validity of finite element analysis (FEA) predictions obtained from a canine lumbar segment model in comparison with experimental biomechanical testing results from the same subjects. ANIMALS 6 healthy beagle dogs were euthanized for other purposes. METHODS The L1–2 and L5–6 segments were harvested from euthanized animals and subjected to rotation tests and compression tests, respectively, using both ex vivo mechanical testing and FEA. For each method, we recorded the maximum torque value and angle of vertebral body rotation at rupture observed in rotation tests, as well as the maximum stress value and displacement of the vertebral body endplate at rupture measured from compression tests. We then calculated Pearson’s correlation coefficient to determine correlations between the angle of gyration and displacement at rupture determined by mechanical testing and FEA. The study started on March 26, 2021, and ended on March 18, 2023. RESULTS For the rotation test, correlation coefficients for the maximum torque and rotation angle of the vertebral body at rupture were r = 0.92 and 0.96, respectively. For the compression test, correlation coefficients for the maximum stress and displacement of the vertebral body endplate at rupture were r = 0.73 and 0.94, respectively. All results showed strong correlations between the FEA predictions and ex vivo mechanical test results. CLINICAL RELEVANCE These findings suggest that FEA predictions are sufficiently reliable for ex vivo mechanical test results for biomechanical studies of canine lumbar segment models.
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The Canadian veterinary journal = La revue veterinaire canadienne 64(9) 823-827 2023年9月A 5-month-old male domestic shorthair cat was presented with severe bilateral hind-limb deformities that caused the cat to walk on the dorsal aspect of the metatarsals. Computed tomography (CT) images revealed that the calcaneus was externally rotated, and the distal end of the calcaneus was turned medially to the talus in both hind limbs. The cat was diagnosed with twisted leg deformity, a congenital tarsal hyperextension deformity (clubfoot). Based on CT images, closing wedge ostectomy was done at the level of the tarsometatarsal joint with the wider part facing laterally. Partial transection of the common calcaneal tendon was not performed. Nine weeks after surgery, the cat was able to walk and jump, with its paws correctly placed on the ground, despite the limited range of motion in the tarsal joints. Based on radiographs with maximum tarsal flexion, the angle of the partial tarsal arthrodesis limited the range of motion. This is apparently the first case report describing CT images and closing wedge ostectomy in a cat with twisted leg deformity. Key clinical message: This article reports the findings obtained from CT imaging of a cat with twisted leg deformity. The current case was successfully managed by closing wedge ostectomy without partial transection of the common calcaneal tendon.
MISC
453-
獣医麻酔外科学雑誌 36(Suppl.2) 149-150 2005年10月
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日本獣医循環器学会抄録 83回 151-152 2005年10月
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日本獣医学会学術集会講演要旨集 140回 185-185 2005年8月
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獣医麻酔外科学雑誌 = Japanese journal of veterinary anesthesia & surgery 36(Suppl.1) 169-170 2005年6月20日
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獣医麻酔外科学雑誌 36(Suppl.1) 122-123 2005年6月
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日本獣医師会雑誌 58(2) 121-124 2005年インスリン抵抗性の糖尿病, および皮膚の非薄化と裂傷がみられた雑種猫の1症例で, 下垂体依存性副腎皮質機能亢進症が診断された. この症例に対して初めにメチラポン, 次にミトタンの投与による治療を試みたところ, 診断後469目で死亡するまでの間, それぞれの薬物で血清コルチゾール値および糖尿病に改善がみられた. メチラポンの投与ならびにミトタンの投与は, それぞれ猫の下垂体依存性副腎皮質機能亢進症の治療法の選択肢として, 考慮すべきものと思われた.
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日本獣医畜産大学研究報告 53 88-88 2004年12月1日
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日本獣医畜産大学研究報告 53 88-88 2004年12月1日
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獣医麻酔外科学雑誌 = Japanese journal of veterinary anesthesia & surgery 35 74-74 2004年10月1日
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獣医麻酔外科学雑誌 = Japanese journal of veterinary anesthesia & surgery 35 120-120 2004年6月20日
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獣医麻酔外科学雑誌 = Japanese journal of veterinary anesthesia & surgery 35 122-123 2004年6月20日
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獣医麻酔外科学雑誌 = Japanese journal of veterinary anesthesia & surgery 35 161-161 2004年6月20日
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獣医麻酔外科学雑誌 = Japanese journal of veterinary anesthesia & surgery 35 124-125 2004年6月20日
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獣医麻酔外科学雑誌 = Japanese journal of veterinary anesthesia & surgery 35 163-164 2004年6月20日
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獣医麻酔外科学雑誌 = Japanese journal of veterinary anesthesia & surgery 35 160-160 2004年6月20日
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日本獣医学会学術集会講演要旨集 136回 204-204 2003年9月
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JOURNAL OF VETERINARY MEDICAL SCIENCE 65(7) 801-804 2003年7月Four dogs diagnosed as pituitary-dependent hyperadrenocorticism were treated with transsphenoidal hypophysectomy and postoperative hormone supplementation therapy. On histological examination of the resected tissues, the tumors were ACTH-producing adenoma of the anterior lobe. Clinical signs such as alopecia and calcinosis cutis, as well as endocrinological abnormalities, were markedly alleviated after surgery. The clinical courses of these 4 dogs suggest that transsphenoidal hypophysectomy may be a useful treatment for pituitary-dependent hyperadrenocorticism.
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JOURNAL OF VETERINARY MEDICAL SCIENCE 65(7) 801-804 2003年7月Four dogs diagnosed as pituitary-dependent hyperadrenocorticism were treated with transsphenoidal hypophysectomy and postoperative hormone supplementation therapy. On histological examination of the resected tissues, the tumors were ACTH-producing adenoma of the anterior lobe. Clinical signs such as alopecia and calcinosis cutis, as well as endocrinological abnormalities, were markedly alleviated after surgery. The clinical courses of these 4 dogs suggest that transsphenoidal hypophysectomy may be a useful treatment for pituitary-dependent hyperadrenocorticism.
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獣医麻酔外科学雑誌 = Japanese journal of veterinary anesthesia & surgery 34 270-271 2003年6月10日
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獣医麻酔外科学雑誌 = Japanese journal of veterinary anesthesia & surgery 34 272-273 2003年6月10日
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獣医麻酔外科学雑誌 = Japanese journal of veterinary anesthesia & surgery 34 220-221 2003年6月10日
書籍等出版物
34講演・口頭発表等
41共同研究・競争的資金等の研究課題
15-
日本学術振興会 科学研究費助成事業 2017年4月 - 2020年3月
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日本学術振興会 科学研究費助成事業 2015年4月 - 2018年3月
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日本学術振興会 科学研究費助成事業 2012年4月 - 2015年3月
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日本学術振興会 科学研究費助成事業 2009年 - 2011年
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日本学術振興会 科学研究費助成事業 2008年 - 2010年