{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T13:09:37Z","timestamp":1790082577830,"version":"4.0.1"},"reference-count":28,"publisher":"American Veterinary Medical Association (AVMA)","license":[{"start":{"date-parts":[[2025,5,20]],"date-time":"2025-05-20T00:00:00Z","timestamp":1747699200000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["ajvr"],"published-print":{"date-parts":[[2025,5,20]]},"abstract":"<jats:title>Abstract<\/jats:title>\n<jats:sec id=\"sc_a1\">\n<jats:title>Objective<\/jats:title>\n<jats:p>To assess changes in patient positioning prior to acetabular cup impaction during total hip replacement (THR) procedures in dogs.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sc_a2\">\n<jats:title>Methods<\/jats:title>\n<jats:p>In a prospective, analytical study, 26 client-owned dogs were evaluated for changes in patient positioning during THR procedures. Following initial patient positioning in true lateral recumbency, fluoroscopic measurement of changes in positioning was performed for each plane at 2 separate time points: after draping (M1) and immediately prior to cup impaction (M2).<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sc_a3\">\n<jats:title>Results<\/jats:title>\n<jats:p>Patient positioning was significantly altered at time point M1 in the transverse plane, with a mean change of 2.8\u00b0 (range, 0\u00b0 to 12\u00b0); this change in position was most often toward the dorsum, occurring in 16 of 26 cases (62%). Significant shifting was found at time point M2 in the transverse plane, with a mean change of 2.6\u00b0 (range, 0\u00b0 to 10.3\u00b0); this change, however, did not significantly correlate with a particular direction. Positioning shifts found at M1 and M2 were not consistently in the same direction in either plane. Body condition score had no effect on shifting found at M1 or M2 in either plane.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sc_a4\">\n<jats:title>Conclusions<\/jats:title>\n<jats:p>Perfect patient positioning is not maintained with the use of bean bag positioners. Despite accurate initial positioning and the use of this positioning device, shifting does occur.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sc_a5\">\n<jats:title>Clinical Relevance<\/jats:title>\n<jats:p>Unrecognized shifts in pelvic position during THR procedures may occur, which could contribute to inappropriate implant positioning. Pelvic alignment should be evaluated during THR procedures to minimize the risk of complications.<\/jats:p>\n<\/jats:sec>","DOI":"10.2460\/ajvr.24.12.0404","type":"journal-article","created":{"date-parts":[[2025,5,20]],"date-time":"2025-05-20T17:36:28Z","timestamp":1747762588000},"page":"1-8","source":"Crossref","is-referenced-by-count":1,"title":["Perfect patient position is not maintained during total hip replacement in dogs using a vacuum bean bag positioner"],"prefix":"10.2460","author":[{"given":"Robert J.","family":"Barnett","sequence":"first","affiliation":[{"name":"Veterinary Care and Specialty Group, Chattanooga, TN"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2204-7905","authenticated-orcid":true,"given":"Samuel J.","family":"Tidwell","sequence":"additional","affiliation":[{"name":"Veterinary Care and Specialty Group, Chattanooga, TN"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaojuan","family":"Zhu","sequence":"additional","affiliation":[{"name":"Knoxville Office of Innovative Technologies, University of Tennessee, Knoxville, TN"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeffrey N.","family":"Peck","sequence":"additional","affiliation":[{"name":"Veterinary Care and Specialty Group, Chattanooga, TN"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1272","reference":[{"key":"B1","series-title":"Advances in Small Animal Joint Replacement","author":"Peck JN","year":"2013","unstructured":"Peck JN, Marcellin-Little DJ. 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Vet Surg. 2000;29(6):524\u2013532. doi:10.1053\/jvet.2000.17858"},{"issue":"3","key":"B4","series-title":"Vet Comp Orthop Traumatol","first-page":"115","article-title":"A review of aseptic loosening in total hip arthroplasty","volume":"14","author":"El-Warrak AO","year":"2001","unstructured":"El-Warrak AO, Olmstead ML, Von Rechenberg A, Auer JA. A review of aseptic loosening in total hip arthroplasty. Vet Comp Orthop Traumatol. 2001;14(3):115\u2013124. doi:10.1055\/s-0038-1632685"},{"key":"B5","series-title":"Biomed Sci Instrum","first-page":"245","article-title":"A comparison of canine and human UHMWPE acetabular component wear","volume":"37","author":"Skurla CT","year":"2001","unstructured":"Skurla CT, James SP. A comparison of canine and human UHMWPE acetabular component wear. Biomed Sci Instrum. 2001;37:245\u2013250."},{"issue":"1","key":"B6","series-title":"J Bone Joint Surg Br","first-page":"120","article-title":"Assessing the dog as a model for human total hip replacement: analysis of 38 canine cemented femoral components retrieved at post-mortem","volume":"87","author":"Skurla CP","year":"2005","unstructured":"Skurla CP, Pluhar GE, Frankel DJ, Egger EL, James SP. Assessing the dog as a model for human total hip replacement: analysis of 38 canine cemented femoral components retrieved at post-mortem. J Bone Joint Surg Br. 2005;87(1):120\u2013127. doi:10.1302\/0301-620X.87B1.14678"},{"issue":"6","key":"B7","series-title":"Vet Surg","first-page":"517","article-title":"Acetabular component orientation as an indicator of implant luxation in cemented total hip arthroplasty","volume":"29","author":"Cross AR","year":"2000","unstructured":"Cross AR, Newell SM, Chambers JN, Shultz KB, Kubilis PS. 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