{"title":"An experimental radiographic study on the changes of stifle and tarsal joint angles related to passive hip joint movements in anesthetized Beagles.","authors":"Linjing Kong, Sawako Murakami, Yasuji Harada, Yasushi Hara","doi":"10.2460/ajvr.25.02.0067","DOIUrl":null,"url":null,"abstract":"<p><strong>Objective: </strong>To investigate the relationships between hindlimb joints angles under the passive movement of hip joints within a relatively wide range of motion in anesthetized Beagles.</p><p><strong>Methods: </strong>9 hindlimbs of 5 clinically normal adult Beagles were included from September 2022 through August 2023. The tested hindlimb was positioned horizontally, with the dog under general anesthesia and muscle relaxation. Unforced angle (UA; when the paw was unforced), forced angle range (FAR; when the paw was under constant pushing/pulling force), and UA range (UAR; when the forces applied to the paw had been withdrawn) of the stifle and tarsal joints were evaluated using radiographic analysis while the hip joint angle was passively adjusted from 70° to 170°. Linear regression analysis was used to assess the relationships between hip, stifle, and tarsal joint angles.</p><p><strong>Results: </strong>Significantly strong linear relationships (adjusted R2 > 0.7) were found for hip-stifle and hip-tarsal in UA, UAR, and when the paw was pushed with the hip joint angle exceeding 120° (FAR-push > 120°). The FAR of stifle and tarsal joints changed with the hip joint angle. Additionally, significantly strong linear relationships (adjusted R2 > 0.85) were found for stifle-tarsal in UA, UAR, and when a constant push force was applied on the paw (FAR-push).</p><p><strong>Conclusions: </strong>This research revealed the linear relationships between canine hindlimb joint angles in the sagittal plane under specific circumstances as well as the narrowing of the FAR of stifle and tarsal joints when hip joint angle exceeds 120°.</p><p><strong>Clinical relevance: </strong>The findings on linkage mechanism-related relationships in hindlimb joints angles from this research may contribute to a better understanding of orthopedic and rehabilitation practices.</p>","PeriodicalId":7754,"journal":{"name":"American journal of veterinary research","volume":" ","pages":"1-10"},"PeriodicalIF":1.3000,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"American journal of veterinary research","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.2460/ajvr.25.02.0067","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"VETERINARY SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
Objective: To investigate the relationships between hindlimb joints angles under the passive movement of hip joints within a relatively wide range of motion in anesthetized Beagles.
Methods: 9 hindlimbs of 5 clinically normal adult Beagles were included from September 2022 through August 2023. The tested hindlimb was positioned horizontally, with the dog under general anesthesia and muscle relaxation. Unforced angle (UA; when the paw was unforced), forced angle range (FAR; when the paw was under constant pushing/pulling force), and UA range (UAR; when the forces applied to the paw had been withdrawn) of the stifle and tarsal joints were evaluated using radiographic analysis while the hip joint angle was passively adjusted from 70° to 170°. Linear regression analysis was used to assess the relationships between hip, stifle, and tarsal joint angles.
Results: Significantly strong linear relationships (adjusted R2 > 0.7) were found for hip-stifle and hip-tarsal in UA, UAR, and when the paw was pushed with the hip joint angle exceeding 120° (FAR-push > 120°). The FAR of stifle and tarsal joints changed with the hip joint angle. Additionally, significantly strong linear relationships (adjusted R2 > 0.85) were found for stifle-tarsal in UA, UAR, and when a constant push force was applied on the paw (FAR-push).
Conclusions: This research revealed the linear relationships between canine hindlimb joint angles in the sagittal plane under specific circumstances as well as the narrowing of the FAR of stifle and tarsal joints when hip joint angle exceeds 120°.
Clinical relevance: The findings on linkage mechanism-related relationships in hindlimb joints angles from this research may contribute to a better understanding of orthopedic and rehabilitation practices.
期刊介绍：
The American Journal of Veterinary Research supports the collaborative exchange of information between researchers and clinicians by publishing novel research findings that bridge the gulf between basic research and clinical practice or that help to translate laboratory research and preclinical studies to the development of clinical trials and clinical practice. The journal welcomes submission of high-quality original studies and review articles in a wide range of scientific fields, including anatomy, anesthesiology, animal welfare, behavior, epidemiology, genetics, heredity, infectious disease, molecular biology, oncology, pharmacology, pathogenic mechanisms, physiology, surgery, theriogenology, toxicology, and vaccinology. Species of interest include production animals, companion animals, equids, exotic animals, birds, reptiles, and wild and marine animals. Reports of laboratory animal studies and studies involving the use of animals as experimental models of human diseases are considered only when the study results are of demonstrable benefit to the species used in the research or to another species of veterinary interest. Other fields of interest or animals species are not necessarily excluded from consideration, but such reports must focus on novel research findings. Submitted papers must make an original and substantial contribution to the veterinary medicine knowledge base; preliminary studies are not appropriate.
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