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Castronovo MG, Wesson DW. Effects of Home Cage Tunnels on Within-cage Behaviors of Mice with Cranial Implants. J Am Assoc Lab Anim Sci 2024; 63:154-159. [PMID: 38286440 PMCID: PMC11022954 DOI: 10.30802/aalas-jaalas-22-000087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 11/21/2022] [Accepted: 07/27/2023] [Indexed: 01/31/2024]
Abstract
Keeping tunnels in the home cages of mice used in research appears to both reduce handling-related stress and provide environmental enrichment. However, for mice that have surgical implants that extend beyond their body, having tunnels in the home cages could engender concerns for their welfare, including the possibility of them becoming stuck in the tunnel. The goal of this study was to determine how mice with different sizes of cranial implants interacted with a tunnel in their home cage. We used male and female mice with a C57BL/6J background in this study. The mice underwent a either a craniotomy in which they received either no implant (sham), an indwelling cannula used for drug delivery, or a ferrule-type implant. The number of mouse interactions with tunnels was recorded over a 30-min period while the mouse was in its home cage with its tunnel. We found that sham mice interacted significantly more with the tunnels than did mice with either cannulae or ferrule implants. On average sham mice interacted more with the tunnel by walking through or over it whereas mice with either type of implant rarely even touched the tunnel with their heads. Our results indicate that mice with implants do not enter in the tunnels, and thus the tunnel reduces accessible cage-space rather than providing enrichment benefits. These results raise the question of whether tunnels should be routinely available for mice with cranial implants.
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Affiliation(s)
- Marissa G Castronovo
- Department of Pharmacology and Therapeutics, University of Florida College of Medicine, 1200 Newell Drive, Gainesville, Florida
| | - Daniel W Wesson
- Department of Pharmacology and Therapeutics, University of Florida College of Medicine, 1200 Newell Drive, Gainesville, Florida
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Mendaza-DeCal R, Peso-Fernandez S, Rodriguez-Quiros J. Orthotics and prosthetics by 3D-printing: Accelerating its fabrication flow. Res Vet Sci 2023; 162:104960. [PMID: 37480718 DOI: 10.1016/j.rvsc.2023.104960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/12/2023] [Accepted: 07/15/2023] [Indexed: 07/24/2023]
Abstract
Orthoses and socket prostheses are rarely used orthopaedic devices in veterinary medicine. Recently, more pet owners have sought these treatments for pets with orthopaedic conditions. However, veterinarians often lack substantial scientific evidence on device outcomes and may expect high costs, the main limiting factor, if human orthopaedic market prices are assumed. This discrepancy creates an imbalance between pet owners' expectations, veterinarians' recommendations, and actual patient benefits. To address economic constraints and enhance knowledge about these devices, this study used 3D technology-namely 3D scanning and printing via fused deposition modelling-to design, modify, and manufacture orthoses and socket prostheses for ten patients, including nine dogs and one calf. An equation was devised and applied to all printed devices to streamline the resizing process for sockets and orthoses. The 3D-printed devices were fitted to the patients, and their adaptation was assessed using three novel scales based on prior scientific literature in the small animal orthopaedic field. The orthoses were well-tolerated, with successful and straightforward adaptation. Although socket prostheses were tolerated, the dogs' adaptation was suboptimal, while the calf demonstrated excellent and immediate adaptation.
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Affiliation(s)
- Rosa Mendaza-DeCal
- Animal Medicine and Surgery Department, Veterinary Faculty, Universidad Complutense de Madrid, Av. Puerta del Hierro s/n, 28040 Madrid, Spain; ABAX Innovation Technologies, C/ Navarra 26, 28691 Villanueva de la Cañada, Spain.
| | | | - Jesus Rodriguez-Quiros
- Animal Medicine and Surgery Department, Veterinary Faculty, Universidad Complutense de Madrid, Av. Puerta del Hierro s/n, 28040 Madrid, Spain
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Colverde AS, Nicetto T, Falzone C. Occipital cranioplasty using customized titanium prosthesis yields successful outcome in association with foramen magnum decompression in dogs suffering by Chiari-like malformation. Am J Vet Res 2021; 83:275-282. [PMID: 34968186 DOI: 10.2460/ajvr.21.11.0178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To describe the use of a customized 3-D-printed titanium prosthesis as adjunctive treatment for foramen magnum decompression (FMD) in dogs with Chiari-like malformation (CM) and syringomyelia (SM). ANIMALS 8 dogs with clinical signs and MRI findings of CM-SM. PROCEDURES 3-D reconstruction of CT images of the head was used to simulate an occipital craniectomy and design the prosthesis. FMD was performed, and the prosthesis was implanted. Follow-up was performed 1, 6, and 12 months later, and clinical status was scored. Repeated MRI images were compared to identify changes involving the neural structures, particularly the syrinx. RESULTS All prostheses were easily positioned based on the preoperative 3-D models, with no complications. At 12 months after surgery, 3 dogs were free of previous medications, 4 were still receiving steroid medications but at lower doses, and 1 was occasionally receiving acupuncture. MRI of 5 dogs 6 to 20 months after surgery revealed resolution of SM (n = 1), reduced size of SM (3), or worse SM (1). All dogs showed an increase in size of the caudal cranial fossa. Dogs with a longer presurgical duration of the clinical signs and wider syrinx generally had worse outcomes than other dogs. CLINICAL RELEVANCE Findings suggested that use of customized 3-D-printed titanium prosthesis and associated FMD can represent an adjunctive option to medically treated dogs with CM-SM. Although the small number of cases precludes definitive conclusions, early surgical treatment, particularly in dogs with a small syrinx, could ensure better long-term outcomes, as previously suggested.
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Lozier JW, Niehaus AJ, Hinds CA, Durgam SS, Jones SC, Lakritz J. Investigation of a novel prosthesis technique for extracapsular stabilization of cranial cruciate ligament-deficient stifle joints in adult cattle. Am J Vet Res 2019; 80:779-786. [PMID: 31339759 DOI: 10.2460/ajvr.80.8.779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To evaluate a novel prosthesis technique for extracapsular stabilization of cranial cruciate ligament (CCL)-deficient stifle joints in adult cattle. SAMPLE 13 cadaveric bovine stifle joint specimens. PROCEDURES In the first of 3 study phases, the most isometric points on the distal aspect of the femur (distal femur) and proximal aspect of the tibia (proximal tibia) were determined from measurements obtained from lateromedial radiographs of a stifle joint specimen maintained at angles of 135°, 90°, 65°, and 35°. During phase 2, 800-lb-test monofilament nylon leader line was cut into 73-cm-long segments. Each segment was secured in a loop by use of 2, 3, or 4 crimping sleeves such that there were 12 replicates for each construct. Each loop was distracted to failure at a constant rate of 1 mm/s. Mean force at failure and elongation and mode of failure were compared among the 3 constructs. During phase 3, bone tunnels were created in the distal femur and proximal tibia at the isometric points identified during phase 1 in each of 12 CCL-deficient stifle joint specimens. The 3-sleeve construct was applied to each specimen. Specimens were distracted to failure at a constant rate of 1 mm/s. RESULTS Among the 3 constructs evaluated, the 3-sleeve construct was considered optimal in terms of strength and amount of foreign material. In phase 3, all replicates failed because of suture slippage. CONCLUSIONS AND CLINICAL RELEVANCE Use of 800-lb-test monofilament nylon leader line as a prosthesis might be a viable alternative for extracapsular stabilization of CCL-deficient stifle joints in adult cattle. Further in vivo studies are necessary.
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Abstract
Dog owner Jodi Ware makes the case for transparency in companion animal research.
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Walsh WR, Pelletier MH, Christou C, He J, Vizesi F, Boden SD. The in vivo response to a novel Ti coating compared with polyether ether ketone: evaluation of the periphery and inner surfaces of an implant. Spine J 2018; 18:1231-1240. [PMID: 29496625 DOI: 10.1016/j.spinee.2018.02.017] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 01/22/2018] [Accepted: 02/13/2018] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Increasing bone ongrowth and ingrowth of polyether ether ketone (PEEK) interbody fusion devices has the potential to improve clinical outcomes. PURPOSE This study evaluated the in vivo response of promoting new bone growth and bone apposition with NanoMetalene (NM) compared with PEEK alone in a cancellous implantation site with an empty aperture. STUDY DESIGN This is a randomized control animal study. METHODS Implants and funding for this study were provided by SeaSpine (60,000 USD). Cylindrical dowels with two apertures were prepared as PEEK with a sub-micron layer of the titanium (NM). The titanium coating was applied over the entire implant (Group 1) or just the apertures (Group 2). Polyether ether ketone implants with no coating served as controls (Group 3). Implants were placed in the cancellous bone of the distal femur or proximal tibia with no graft material placed in the apertures in eight adult sheep. Bone ongrowth to the surface of the implant and ingrowth into the apertures was assessed at 4 and 8 weeks after surgery with micro-computed tomography (CT) and undecalcified histology. RESULTS The apertures in the implants were notably empty in the PEEK group at 4 and 8 weeks. In contrast, new bone formation into the apertures was found in samples coated with NM even though no graft material was placed into the defect. The bone growing into the aperture tracked along the titanium layer. Apertures with the titanium coating demonstrated significantly more bone by micro-CT qualitative grading compared with PEEK with average bone coverage scores of Group 1 (NM) 1.62±0.89, Group 2 (NM apertures only) 1.62±0.77, and Group 3 (PEEK) 0.43±0.51, respectively, at 4 weeks (p<.01) and Group 1 (NM) 1.79±1.19, Group 2 (NM apertures only) 1.98±1.18, and Group 3 (PEEK) 0.69±0.87, respectively, at 8 weeks (p<.05). The amount of bone in the apertures (ingrowth) quantified using the volumetric data from the micro-CT supported an overall increase in bone volume inside the apertures with the titanium coating compared with PEEK. Histology showed newly formed woven bone tracked along the surface of the titanium in the apertures. The PEEK interface presented the typical nonreactive fibrous tissue inside the apertures at 4 weeks and some focal contact with bone on the outside at 4 weeks and 8 weeks. CONCLUSIONS Micro-CT and histology demonstrated bone ongrowth to the surfaces coated with NM where the newly formed bone tracked along the thin titanium-coated surfaces. Polyether ether ketone surfaces presented the nonreactive fibrous tissue at the interface as previously reported in preclinical scenarios.
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Affiliation(s)
- William Robert Walsh
- Surgical & Orthopaedic Research Laboratories, Prince of Wales Clinical School - The University of New South Wales, Avoca St, Randwick, Sydney, NSW 2031, Australia.
| | - Matthew H Pelletier
- Surgical & Orthopaedic Research Laboratories, Prince of Wales Clinical School - The University of New South Wales, Avoca St, Randwick, Sydney, NSW 2031, Australia
| | - Chris Christou
- Surgical & Orthopaedic Research Laboratories, Prince of Wales Clinical School - The University of New South Wales, Avoca St, Randwick, Sydney, NSW 2031, Australia
| | - Jiawei He
- SeaSpine, 5770 Armada Dr, Carlsbad, CA 92009, USA
| | - Frank Vizesi
- SeaSpine, 5770 Armada Dr, Carlsbad, CA 92009, USA
| | - Scott D Boden
- Emory Orthopaedics & Spine Center, Emory University, 59 Executive Park South, Suite 3000, Atlanta, GA 30329, USA
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Doane CJ, Zimmerman PE, Putnam PT, Gothard KM, Besselsen DG. Silicon Foreign Body in the Cerebrum of a Rhesus Macaque ( Macaca mulatta). Comp Med 2018; 68:182-186. [PMID: 29663945 PMCID: PMC5897976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 10/15/2017] [Accepted: 10/30/2017] [Indexed: 06/08/2023]
Abstract
A male rhesus macaque with a cephalic chamber implant for neurophysiology recording presented with hemiparesis affecting the left thoracic and pelvic limbs at approximately 5 wk after craniotomy surgery. MRI indicated a 1×2-cm ovoid cerebrocortical cystic lesion immediately subjacent to the right hemisphere craniotomy and recording chamber. Transdural aspiration of sterile transudate and resultant decompression resolved the hemiparesis, and follow-up MRI at 1 mo indicated resolution of the lesion. Subsequently, necropsy at study end revealed a cerebrocortical foreign body composed of silicon. The atypically slow cure rate of the lot of silicon used and the unique recording chamber configuration were underlying factors that contributed to the formation of this foreign body. To our knowledge, this report is the first description of iatrogenic intracerebral foreign body in a macaque.
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Affiliation(s)
- Cynthia J Doane
- University Animal Care, University of Arizona, Tucson, Arizona, USA.,
| | | | - Philip T Putnam
- Department of Physiology, University of Arizona, Tucson, Arizona, USA
| | - Katalin M Gothard
- Department of Physiology, University of Arizona, Tucson, Arizona, USA
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Nazarali A, Singh A, Morrison S, Gibson TW, Rousseau J, Weese JS, Boston SE. Comparison of methicillin-resistant Staphylococcus pseudintermedius adherence to 2 canine limb salvage endoprosthesis implants. Can Vet J 2017; 58:964-966. [PMID: 28878420 PMCID: PMC5556484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The objective of our study was to compare adhesion of methicillin-resistant Staphylococcus pseudintermedius (MRSP) to stainless steel (SS) and to tantalum (TA) canine limb salvage endoprosthesis implants in an in vitro experimental study. The median of the mean log10 colony forming units/mL for adherent MRSP was 4.96 (range: 4.63 to 6.33) for the TA endoprosthesis and 4.31 (range: 3.86 to 5.05) for the SS endoprosthesis (P = 0.009). Although the trabecular and porous design of the TA endoprosthesis provides mechanical benefits over the SS endoprosthesis, it may increase the risk of developing infection due to higher levels of bacterial adherence.
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Affiliation(s)
| | - Ameet Singh
- Address all correspondence to Dr. Ameet Singh; e-mail:
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de Souza HJM, Amorim FV, Corgozinho KB, Tavares RR. Management of the traumatic oronasal fistula in the cat with a conical silastic prosthetic device. J Feline Med Surg 2017; 7:129-33. [PMID: 15771950 DOI: 10.1016/j.jfms.2004.02.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/09/2004] [Indexed: 11/19/2022]
Abstract
Management of a traumatic oronasal fistula with a prosthetic device in an 8-year-old male neutered domestic shorthair cat is described. The animal had fallen from a height of three stories at the age of 1 year. The fall had resulted in a fracture of the hard palate and a split in the palatal mucosa. Two surgical attempts to close the defect had been unsuccessful and an autopolymerizable acrylic resin prosthesis had produced unsatisfactory results. The management of the chronic traumatic fistula with a conical prosthetic device was fast, easy and efficient. The device was removed and a second one was put in place after 2 years. This method would appear particularly useful for obturation of large palatal defects that have failed to heal after attempts at surgical closure and is an alternative treatment for debilitated cats which may not be candidates for longer surgical procedures.
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Affiliation(s)
- Heloisa Justen M de Souza
- Department of Medicine and Surgery, Veterinary Institute, Universidade Federal Rural do Rio de Janeiro, Br 465, Km 7, Seropédica, Rio de Janeiro, RJ CEP 23890-000, Brazil
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Abstract
OBJECTIVE To characterize clinical and pathological features of implant-associated neoplasms in dogs. DESIGN Retrospective case-control study. ANIMALS 16 dogs with implant-associated neoplasia and 32 control dogs with osteosarcoma without implants. Procedures: Medical records of dogs with tumors associated with metallic implants (cases) treated between 1983 and 2013 were reviewed. Two dogs with naturally occurring osteosarcoma (controls) were matched to each case on the basis of tumor location, age, and sex. RESULTS Median time from implant placement to diagnosis of neoplasia was 5.5 years (range, 9 months to 10 years). Pelvic limbs were most frequently affected, including the tibia (8/16) and femur (5/16), with 1 neoplasm involving both the femur and pelvis. Implant: associated tumors most commonly affected the diaphysis (15/16), with osteosarcomas significantly more likely to involve the long bone diaphysis in case dogs than in control dogs with naturally occurring osteosarcomas. Osteosarcoma was the most common tumor, accounting for 13 of 16 implant-associated tumors. For 7 of these osteosarcoma cases, review of histopathology results enabled subclassification into osteoblastic nonproductive (n = 3), chondroblastic (2), osteoblastic productive (1), and fibroblastic (1) groups. Three case dogs had a diagnosis of histiocytic sarcoma, fibrosarcoma, and spindle cell sarcoma. CONCLUSIONS AND CLINICAL RELEVANCE Results of this study highlighted important anatomic differences between spontaneous and implant-associated neoplasia in dogs.
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Vascellari M, Melchiotti E, Mutinelli F. Fibrosarcoma with Typical Features of Postinjection Sarcoma at Site of Microchip Implant in a Dog: Histologic and Immunohistochemical Study. Vet Pathol 2016; 43:545-8. [PMID: 16846997 DOI: 10.1354/vp.43-4-545] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A 9-year-old, male French Bulldog was examined for a subcutaneous mass located at the site of a microchip implant. Cytologic examination of the mass was suggestive of a malignant mesenchymal neoplasm. Histologically, the mass was confirmed as a high-grade infiltrative fibrosarcoma, with multifocal necrosis and peripheral lymphoid aggregates. By immunohistochemistry, the sample was investigated for vimentin, smooth-muscle actin (SMA), CD3, CD79α, and CD18. All the neoplastic cells were positive for vimentin. Scattered cells at the periphery of the lesion were also positive for SMA, highlighting a myofibroblastic phenotype. The lymphoid cells were positive for CD18 and CD3. No aluminum deposits were detected by the aurintricarboxylic acid method. A diagnosis of fibrosarcoma morphologically similar to feline postinjection sarcomas was made. Fibrosarcomas at the site of injections have been reported in dogs and ferrets. Furthermore, neoplastic growth at the site of microchip implant in dog and laboratory rodents has been described.
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Affiliation(s)
- M Vascellari
- Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell'Università 10, 35020 Legnaro (PD) (Italy).
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Maxwell BM, Brunell MK, Olsen CH, Bentzel DE. Comparison of Digital Rectal and Microchip Transponder Thermometry in Ferrets (Mustela putorius furo). J Am Assoc Lab Anim Sci 2016; 55:331-335. [PMID: 27177569 PMCID: PMC4865697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 07/16/2015] [Accepted: 08/31/2015] [Indexed: 06/05/2023]
Abstract
Body temperature is a common physiologic parameter measured in both clinical and research settings, with rectal thermometry being implied as the 'gold standard.' However, rectal thermometry usually requires physical or chemical restraint, potentially causing falsely elevated readings due to animal stress. A less stressful method may eliminate this confounding variable. The current study compared 2 types of digital rectal thermometers-a calibrated digital thermometer and a common digital thermometer-with an implantable subcutaneous transponder microchip. Microchips were implanted subcutaneously between the shoulder blades of 16 ferrets (8 male, 8 female), and temperatures were measured twice from the microchip reader and once from each of the rectal thermometers. Results demonstrated the microchip temperature readings had very good to good correlation and agreement to those from both of the rectal thermometers. This study indicates that implantable temperature-sensing microchips are a reliable alternative to rectal thermometry for monitoring body temperature in ferrets.
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Affiliation(s)
- Branden M Maxwell
- Center for Laboratory Animal Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA.
| | - Marla K Brunell
- Center for Laboratory Animal Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
| | - Cara H Olsen
- Department of Preventive Medicine and Biometrics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
| | - David E Bentzel
- Center for Laboratory Animal Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
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Cook JL, Schulz KS, Karnes GJ, Franklin SP, Canapp SO, Lotsikas PJ, Fitzpatrick N, Wheeler JL, Stiffler KS, Gillick M, Cross AR, Walls CM, Albrecht MR, Williams N, Crouch DT, Lewis DD, Pozzi A, Ridge P. Clinical outcomes associated with the initial use of the Canine Unicompartmental Elbow (CUE) Arthroplasty System(®). Can Vet J 2015; 56:971-977. [PMID: 26345493 PMCID: PMC4535516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We evaluated mid- to long-term outcomes with respect to function and complications in dogs undergoing canine unicompartmental elbow (CUE) arthroplasty for treatment of medial compartment disease of the elbow. This prospective multicenter case series is the first group of clinical cases to receive CUE arthroplasty. Cases (each elbow that underwent CUE performed by a participating surgeon) were enrolled into an electronic database and prospectively followed to determine and record all associated complications, as well as functional outcomes. There were 103 cases from 18 surgeons. Final follow-up time ranged from 6 to 47 mo with a mean and median of 10 mo. Canine unicompartmental elbow was associated with 1 catastrophic (1%), 11 major (10.7%), and 28 minor (27.2%) complications. Outcomes following CUE were reported as full function in 49 cases (47.6%), acceptable function in 45 cases (43.7%), and unacceptable function in 9 cases (8.7%). We conclude that CUE arthroplasty is an appropriate consideration for treatment of medial compartment disease of the elbow in dogs.
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Affiliation(s)
- James L. Cook
- Address all correspondence to Dr. James L. Cook; e-mail:
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Embleton NA, Barkowski VJ. Surgical treatment of canine stifle disruption using a novel extracapsular articulated stifle stabilizing implant. Can Vet J 2015; 56:144-148. [PMID: 25694662 PMCID: PMC4298264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A 5-year-old Labrador retriever mixed breed dog was presented for an acute non-weight-bearing left hind limb lameness. A stifle disruption was diagnosed. The patient was treated using a novel extracapsular articulated stifle stabilizing implant (Simitri™). Twelve weeks after surgery the patient had full range of motion of the affected stifle and had begun to return to pre-injury activity. This is the first reported case of this condition being surgically managed successfully in this manner.
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Abstract
The design of an instrument deployed in a project studying the high altitude Himalayan migrations of bar-headed geese (Anser indicus) is described. The electronics of this archival datalogger measured 22 × 14 × 6.5 mm, weighed 3 g, was powered by a ½AA-sized battery weighing 10 g and housed in a transparent biocompatible tube sealed with titanium electrodes for electrocardiography (ECG). The combined weight of 32 g represented less than 2% of the typical bodyweight of the geese. The primary tasks of the instrument were to continuously record a digitised ECG signal for heart-rate determination and store 12-bit triaxial accelerations sampled at 100 Hz with 15% coverage over each 2 min period. Measurement of atmospheric pressure provided an indication of altitude and rate of ascent or descent during flight. Geomagnetic field readings allowed for latitude estimation. These parameters were logged twice per minute along with body temperature. Data were stored to a memory card of 8 GB capacity. Instruments were implanted in geese captured on Mongolian lakes during the breeding season when the birds are temporarily flightless due to moulting. The goal was to collect data over a ten month period, covering both southward and northward migrations. This imposed extreme constraints on the design's power consumption. Raw ECG can be post-processed to obtain heart-rate, allowing improved rejection of signal interference due to strenuous activity of locomotory muscles during flight. Accelerometry can be used to monitor wing-beat frequency and body kinematics, and since the geese continued to flap their wings continuously even during rather steep descents, act as a proxy for biomechanical power. The instrument enables detailed investigation of the challenges faced by the geese during these arduous migrations which typically involve flying at extreme altitudes through cold, low density air where oxygen availability is significantly reduced compared to sea level.
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Affiliation(s)
- Robin J Spivey
- Department of Biological Sciences, Bangor University, Gwynedd LL57 2UW, United Kingdom
| | - Charles M Bishop
- Department of Biological Sciences, Bangor University, Gwynedd LL57 2UW, United Kingdom
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Witte TH, Cheetham J, Rawlinson JJ, Soderholm LV, Ducharme NG. A transducer for measuring force on surgical sutures. Can J Vet Res 2010; 74:299-304. [PMID: 21197230 PMCID: PMC2949343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/05/2009] [Accepted: 12/02/2009] [Indexed: 05/30/2023]
Abstract
The objective of this study was to validate, both in vitro and in an ex vivo model, a technique for the measurement of forces exerted on surgical sutures. For this purpose, a stainless steel E-type buckle force transducer was designed and constructed. A strain gauge was mounted on the central beam of the transducer to measure transducer deformation. The transducer was tested and calibrated on a single strand of surgical suture during cyclic loading. Further validation was performed using a previously published cadaveric model of laryngoplasty in the horse. Linear regression of transducer output with actual force during calibration tests resulted in mean R² values of 1.00, 0.99, and 0.99 for rising slope, falling slope, and overall slope, respectively. The R² was not less than 0.96 across an average of 75 cycles per test. The difference between rising slope and falling slope was 4%. Over 45 846 samples, the predicted force from transducer output showed a mean error of 4%. In vitro validation produced an adjusted R² of 0.99 when the force on the suture was regressed against translaryngeal pressure in a mixed-effects model. E-type buckle force transducers showed a highly linear output over a physiological force range when applied to surgical suture in vitro and in an ex vivo model of laryngoplasty. With appropriate calibration and short-term in vivo implantation, these transducers may advance our knowledge of the mechanisms of success and failure of techniques, such as laryngoplasty, that use structural suture implants.
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Affiliation(s)
- Thomas H Witte
- Equine Performance Testing Clinic, Department of Veterinary Clinical Sciences, Cornell University Hospital for Animals, Cornell University College of Veterinary Medicine, Ithaca, New York 14850, USA.
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Smith JE, Barnes AL, Maloney SK. A nonsurgical method allowing continuous core temperature monitoring in mares for extended periods, including during endurance exercise. Equine Vet J 2010:65-9. [PMID: 17402394 DOI: 10.1111/j.2042-3306.2006.tb05515.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
REASONS FOR PERFORMING STUDY Body temperature can be a useful measure of how well the horse responds to thermal challenges of exercise and environment. Currently there is little information available about how body temperature changes throughout an endurance ride, and no nonsurgical methods to evaluate internal temperature of exercising horses during prolonged periods and during long distances. OBJECTIVE To develop and test a nonsurgical method, using temperature loggers, of continuously recording internal temperature during exercise and over an extended period. METHODS Loggers were inserted transcervically into the uterus of mares to measure internal temperature. A total of 9 mares were implanted for periods of 3 days to 6 weeks. The internal temperature was recorded while horses underwent their normal training and competition. Loggers were validated against rectal temperature over a range of internal temperatures while mares were alternatively exercised and rested. RESULTS The technique proved to be straightforward and accurate. There were no ill effects observed and all mares retained the logger in utero until removal manually, except for one mare, which expelled the logger when she came into oestrus. The intrauterine and deep rectal temperatures were highly correlated and increased during exercise and decreased with aggressive cooling after exercise. CONCLUSIONS The technique is a useful and accurate nonsurgical method for prolonged monitoring of internal temperature in mares, including those animals in athletic competition. POTENTIAL RELEVANCE This method allows more intensive studies of core temperature during prolonged exercise in competition and under different environmental conditions. It also enables comparison to be made of different methods of cooling of horses post exercise.
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Affiliation(s)
- J E Smith
- School of Animal Biology, The University of Western Australia, Perth
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MacDonald TL, Schiller TD. Limb-sparing surgery using tantalum metal endoprosthesis in a dog with osteosarcoma of the distal radius. Can Vet J 2010; 51:497-500. [PMID: 20676291 PMCID: PMC2857428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A 5-year-old, male neutered, mixed breed dog was presented for left forelimb lameness and swelling over the left distal radius. A primary bone tumor of the distal radius was diagnosed and limb-sparing surgery of the left forelimb was performed using a tantalum metal-DCP endoprosthesis. Post-operative histopathology confirmed osteosarcoma.
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Affiliation(s)
- Tamara L MacDonald
- Small Animal Surgery Department, Canada West Veterinary Specialists and Critical Care Hospital, 1988 Kootenay St. Vancouver, British Columbia.
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Fitzpatrick N. The companion interview: Noel Fitzpatrick. J Small Anim Pract 2009; 50:29-30. [PMID: 19810212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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White P. Treatment of patent ductus arteriosus by the use of an Amplatz canine ductal occluder device. Can Vet J 2009; 50:401-404. [PMID: 19436449 PMCID: PMC2657524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A 7-month-old female, spayed border collie was referred to the Ontario Veterinary College due to a continuous murmur noted by the referring veterinarian prior to ovariohysterectomy. Auscultation confirmed a grade VI/VI continuous murmur. An echocardiogram confirmed patent ductus arteriosus (PDA). An Amplatz canine ductal occluder device was successfully placed for occlusion of blood flow though the ductus.
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Affiliation(s)
- Pam White
- Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, Prince Edward Island C1A 4P3, Canada
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Abstract
The ability to monitor and record precise blood pressure fluctuations in research animals is vital to research for human hypertension. Direct measurement of blood pressure via implantable radio telemetry devices is the preferred method for automatic collection of chronic, continuous blood pressure data. Two surgical techniques are described for instrumenting the two most commonly used laboratory rodent species with radiotelemetry devices. The basic rat procedure involves advancing a blood pressure catheter into the abdominal aorta and placing a radio transmitting device in the peritoneal cavity. The mouse technique involves advancing a thin, flexible catheter from the left carotid artery into the aortic arch and placing the telemetry device under the skin along the animal's flank. Both procedures yield a chronically instrumented model to provide accurate blood pressure data from an unrestrained animal in its home cage.
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Yamazoe K, Miyamoto S, Hikosaka Y, Kitagawa K, Watanabe K, Sakai H, Kudo T. Three-dimensional culture of keratinocytes and the formation of basement membrane for canine footpad substitute. J Vet Med Sci 2007; 69:611-7. [PMID: 17611357 DOI: 10.1292/jvms.69.611] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A pad equivalent for a dog was prepared as a substitute for the loss of footpad. In addition to the time course of formation on epidermal morphogenesis, we investigated expressions of alpha(6) integrin subunit as adhesive molecule, and laminin and type IV and VII collagens as extracellular matrices of basement membrane components. Epithelium of the pad equivalent was thick enough to be easily confirmed at 5 days at the air-liquid interface, but many creases appeared on it at 7 days, and it shrank at 10 and 14 days. Keratinocytes were increased in 4 to 5 cell layers at 1 day at the air-liquid interface, differentiating into basal cell layer. Granular and corneal cell layers were confirmed until 5 days, and maintained their shape at least until 14 days. Alpha 6 integrin was expressed at almost the same fluorescent intensity as native pad tissue at 1 day at the dermal-epidermal junction. Laminin and type IV collagen were intermittently expressed at 5 and 10 days, respectively, at the dermal-epidermal junction, and at 14 days the fluorescence showed almost the same intensity as native pad tissue. The expression of type VII collagen was discontinuous at 2 days at the dermal-epidermal junction, but remained as it was at 14 days. The present findings suggested that although the formation of anchoring fibrils in basement membrane was incomplete, the pad equivalent in the dog was reconstructed similar to a native pad by epidermal morphogenesis.
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Affiliation(s)
- Kazuaki Yamazoe
- Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
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Gosálvez LF, Santamarina C, Averós X, Hernández-Jover M, Caja G, Babot D. Traceability of extensively produced Iberian pigs using visual and electronic identification devices from farm to slaughter. J Anim Sci 2007; 85:2746-52. [PMID: 17609464 DOI: 10.2527/jas.2007-0173] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A total of 351 Iberian pigs with equal numbers of both sexes from 2 commercial farms were used to study the ability of various identification devices to guarantee the traceability required for labeled meat products from Iberian pigs reared under extensive production conditions in Spain. The performance of tattoos, visual ear tags, electronic ear tags, and i.p.-injected transponders of half duplex and full duplex technologies were compared during a production cycle from nursery to slaughter at 15 mo of age (156 +/- 3 kg of BW). No major health reactions to any of the identification methods were detected. Results showed that tattooing was not an adequate identification procedure due to reading difficulties as a consequence of dark skin, soiled appearance, and figure deformation. Ear tag losses and failures were affected by fencing type and increased in one of the farms (20.4 and 15.7% for losses and failures, respectively; P < 0.05) as a consequence of using barbed-wire fences. Ear tag losses decreased when fences changed to stone blocks at 365 d of age. Visual and electronic ear tag losses during transport and slaughter were low (3.7% for visual and 3.1% for electronic tag). Results of injectable transponders during the growing-fattening period were variable and were more readable for the half duplex than for the full duplex i.p. transponders (92.0 vs. 68.7% +/- 1.5; P < 0.05). Handheld transceivers worked properly under extensive conditions, although the body size and skin characteristics of the Iberian breed might limit the performance of reading devices, and the use of transceivers with longer reading distances is recommended. The main problem observed with i.p. transponders was their low recovery rate at slaughter due to the lack of adherence of the transponders to the omentum.
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Affiliation(s)
- L F Gosálvez
- Departament de Producció Animal, Universitat de Lleida. Avda. Rovira Roure 191, 25198 Lleida, Spain.
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Rhodes L, Jöchle W. Letter to the Editor. J Am Vet Med Assoc 2007; 230:806. [PMID: 17362151 DOI: 10.2460/javma.230.6.806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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25
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Ferrell ST, Marlar AB, Alberts AC, Young LA, Bradley K, Hurlbut SL, Lung NP. Surgical technique for permanent intracoelomic radiotransmitter placement in Anegada iguanas (Cyclura pinguis). J Zoo Wildl Med 2007; 36:712-5. [PMID: 17312733 DOI: 10.1638/04089.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Twenty-four juvenile to subadult Anegada iguanas (Cyclura pinguis), captive-reared in a propagation facility, were designated by a coordinated recovery program for release in the summer of 2003. To facilitate postrelease monitoring, a radiotransmitter device was placed within the coelomic cavity of each animal under general anesthesia before release. The equipment sterilization technique and the method of attachment of the transmitters to the coelomic body wall resulted in functional transmitters and acceptably low rates of mortality associated with the procedure.
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Affiliation(s)
- Shannon T Ferrell
- Animal Health Department, Fort Worth Zoo, 1989 Colonial Parkway, Fort Worth, Texas 76110, USA
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Abstract
OBJECTIVES The objective of this study was to assess the feasibility of transcatheter embolisation of a patent ductus arteriosus using an Amplatzer vascular plug (Amplatzer Medical UK) in six dogs. METHODS The Amplatzer vascular plug is a self-expandable, cylindrical device attached to a delivery cable. In all the dogs, the device was delivered transvenously. Successful device implantation was defined as firm anchorage of the device squarely within the distal part of the ductus arteriosus with no intra- or postoperative dislodgement. Successful occlusion of the ductus arteriosus occurred if a disappearance of the continuous murmur was achieved 24 hours after placement of the Amplatzer vascular plug. RESULTS The age of the dogs ranged from 16 weeks to 7.5 years. Their weights ranged from 2.9 to 27.6 kg (median 6 kg). Two dogs had congestive heart failure before embolisation. Successful device implantation was achieved in all dogs. Successful occlusion of the ductus arteriosus was achieved in four of the six dogs. Complications included mild lameness, residual shunting, and bruising and pruritus around the surgical wound site. At follow-up, two dogs had a continuous murmur and one required treatment for congestive heart failure. CLINICAL SIGNIFICANCE This technique may represent a clinically effective and less expensive alternative to the use of an Amplatzer duct occluder (Amplatzer Medical UK) in dogs with medium-sized patent ductus arteriosus. Further investigations are required to fully evaluate its efficacy and safety in various sizes and types of patent ductus arteriosus, and to determine the optimal device size in relation to the size of the ductus.
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Affiliation(s)
- P J Smith
- Dick White Referrals, Station Farm, London Road, Six Mile Bottom, Suffolk CB8 0UH, UK
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Sterna J. Distraction with bone cement plug as a treatment of caudal cervical spondylomyelopathy--report of three cases. Pol J Vet Sci 2007; 10:179-182. [PMID: 17937191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The aim of this report is the presentation of disc-associated caudal cervical spondylomyelopathy cases in dogs treated with the method of distraction and stabilization with the cement plug. Surgical operations were performed in 2 rottweilers and one cross-breed. In one case, two lesions were operated at the same time and in one it was a recurrence after 4 years (in the intervertebral space adjacent to the operated one--domino effect). Two cases were cured, in one the health state became worse and the patient was euthanitized. The applied method may give good clinical effects, however, some improvements could still be introduced.
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Affiliation(s)
- J Sterna
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Warsaw Agricultural University, Nowoursynowska 159 C, 02-776 Warsaw, Poland.
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Acosta AC, Espana EM, Stoiber J, Lamar PD, Marangon F, Alfonso E, Parel JM. Corneal stroma regeneration in felines after supradescemetic keratoprosthesis implantation. Cornea 2006; 25:830-8. [PMID: 17068461 DOI: 10.1097/01.ico.0000220769.19402.86] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE To show corneal regeneration in 3 cats that underwent lamellar keratectomy (90%) depth during supradescemetic keratoprosthetic implantation. METHODS Three 2-year-old cats that underwent spontaneous keratoprosthesis extrusion between 15 and 150 days after implanting a supradescemetic prosthesis into their right eyes were studied. Corneal structures and stroma thickness were evaluated by slit-lamp photographs, pachymetry, and confocal microscopy. Regenerated corneal epithelial cells, stroma matrix, and keratocyte morphology were studied with histology and transmission electron microscopy. Epithelial and stromal cell immunocharacterization was performed. RESULTS Corneas progressively regained normal thickness and improved clarity within 40 to 60 days. Slit-lamp photographs and pachymetry showed gains in stromal thickness until 600 microm or more. In vivo confocal microscopy showed the restoration of normal epithelium and stroma in all cats. Corneal nerves were seen in the regenerated stroma of 2 cats. Immunostaining showed absent alpha-smooth muscle actin (SMA) expression and a keratin K3-expressing epithelium. Electron microscopy showed regeneration of normal epithelium with a well-formed basement membrane, organized corneal lamellae, and the presence of normal keratocytes. CONCLUSION Felines are capable of regenerating corneal structures including epithelium and reinnervated stroma matrix after deep lamellar keratectomy. The use of feline models in corneal keratoprosthesis is therefore questionable.
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Affiliation(s)
- Ana C Acosta
- Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA
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von der Höh N, Krause A, Hackenbroich C, Bormann D, Lucas A, Meyer-Lindenberg A. [Influence of different surface machining treatments of resorbable implants made from different magnesium-calcium alloys on their degradation--a pilot study in rabbit models]. Dtsch Tierarztl Wochenschr 2006; 113:439-46. [PMID: 17233279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
To examine the influence of different surface machining treatments of resorbable implants 3x5 mm cylinders of magnesium-calcium-alloys with plane, rough or sand blasted surface and different concentrations of calcium (0.4 %, 0.8 %, 1.2 % und 2.0 %) were implanted into the distal femur condylus of 18 New Zealand White Rabbits. They were placed into the spongy-cortical passage. During six weeks the animals were examined daily and x-rayed weekly. After euthanasia the bone was explanted and scanned in a microcomputed tomograph. The implants were well tolerated by the rabbits, neither lameness nor signs of pain occured. Wound healing was mostly without complications. Eight of 36 implants (22 %) showed dehiscence of suture within first ten days, whereby implants made of 1,2 % MgCa were mainly affected (six of 12 cases, 50 %). At the place of insertion all implants induced obvious callus genesis which could be seen in MgCa 1,2-cylinders with plane surface and MgCa 0,8-cylinders with rough and sand blasted surface the most. Influence of different calcium concentrations on degradation behaviour could not be discovered. They showed different stages of resorption. Concerning the different surface machining treatments sand blasted implants showed the highest degree of degradation which could be seen by the totally loss of structure in micro-computed examinations. These implants also showed in six of 36 cases a clinical occurrence of gas production. Rough implants showed an irregular degradation with high degree of resorption of some implants and signs of degradation only in the border area of others. Cylindricity maintained in plane implants. They showed loss of structure only in border areas.
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Affiliation(s)
- N von der Höh
- Klinik für kleine Haustiere, Stiftung Tierärztliche Hochschule Hannover.
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Wilson N. Surgical repair of traumatic oronasal fistula in a domestic short-haired cat. Can Vet J 2006; 47:1210-3. [PMID: 17217092 PMCID: PMC1636605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A 9-month-old, spayed female domestic shorthair was presented with a suspected traumatic oronasal fistula. Two surgical attempts using mucosal advancement flaps and single layer closure failed, likely due to inadequate blood supply that was potentially exacerbated by excess tension and trauma on the graft.
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Affiliation(s)
- Nicola Wilson
- Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan
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Liptak JM, Dernell WS, Ehrhart N, Lafferty MH, Monteith GJ, Withrow SJ. Cortical allograft and endoprosthesis for limb-sparing surgery in dogs with distal radial osteosarcoma: a prospective clinical comparison of two different limb-sparing techniques. Vet Surg 2006; 35:518-33. [PMID: 16911152 DOI: 10.1111/j.1532-950x.2006.00185.x] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To compare surgical and oncologic outcome in dogs with osteosarcoma (OSA) of the distal aspect of the radius treated with limb-sparing surgery, using either a cortical allograft or endoprosthesis, and postoperative chemotherapy; and to evaluate predictive factors for outcome. STUDY DESIGN Prospective cohort study. ANIMALS Dogs (n = 20) with spontaneous, non-metastatic OSA of the distal aspect of the radius. METHODS Dogs were prospectively randomized for limb-sparing surgery with either a cortical allograft (n = 10) or endoprosthesis (10) and full-course adjuvant chemotherapy using single or dual agent protocols of cisplatin, carboplatin, and/or doxorubicin. Surgical (intraoperative findings, postoperative infection, construct failure) and oncologic (local tumor recurrence, metastasis, survival) outcomes were compared. The influence of intraoperative and postoperative variables on surgical and oncologic outcome were evaluated. RESULTS No clinically significant differences in surgical and oncologic outcome were detected between groups. The percentage of radius replaced by the implant was significantly greater in the endoprosthesis group (60.9% compared with 48.6%, P = .008). Median survival time (MST) for dogs with construct failure, regardless of implant type, was 685 days and significantly greater than MST of dogs without construct failure (322 days, P = .042; hazard ratio [HR] 16.82). Median metastasis-free interval and MST (685 days versus 289 days; P = .034, HR 24.58) were significantly greater in dogs with postoperative infection. Disease-free and overall limb-salvage rates were 70% and 85%, respectively. Overall MST was 430 days. CONCLUSIONS For dogs with OSA of the distal aspect of the radius, a cortical allograft or endoprosthesis can be used for limb-sparing surgery. Construct failure and postoperative infection significantly improve survival time regardless of implant type. CLINICAL RELEVANCE An endoprosthesis is an attractive alternative to cortical allografts for limb-salvage of the distal aspect of the radius in dogs because surgical and oncologic outcomes are similar, but the endoprosthesis is an immediately available off-the-shelf implant which is not complicated by the bone harvesting and banking requirements associated with cortical allografts. Mechanisms whereby postoperative infection improves survival time requires further investigation and, if elucidated, may provide the opportunity to improve the outcome of dogs and humans with OSA.
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Affiliation(s)
- Julius M Liptak
- Animal Cancer Center, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, USA
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Abstract
The effects of vaginal implant transmitters for tissue damage after 11 wk in 13 captive adult elk (Cervus elaphus nelsoni) and subsequent reproductive performance in 38 free-ranging elk were evaluated. Vaginal implant transmitters are designed to be shed at parturition and are used to locate birth sites of wild ungulates; however, potential adverse effects of these transmitters on tissues associated with the vaginal walls or subsequent reproductive performance have not been assessed. Vaginal implant transmitters consist of a transmitter encased in inert acrylic with an antenna trailing out the distal end and wings at the proximal end to hold the transmitter in place. Using a laparoscope on sedated captive elk, necrosis or measurable differences in tissue trauma between designs with wing spans of 80 versus 150 mm over an 11-wk trial were not observed. After the captive elk trial, vaginal implant transmitters with 80-mm wings were placed into 38 pregnant wild elk, and 31 live births were documented. Fates of seven calves were not determined, because their transmitters were not shed at the birth site. We recaptured 36 of these cow elk again in fall 2003 or spring 2004, and 32 were pregnant. This study was unable to document any short- or long-term effects of vaginal implant transmitters on reproductive performance of cow elk in captive and free-range environments.
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Affiliation(s)
- Bruce K Johnson
- Oregon Department of Fish and Wildlife, 1401 Gekeler Lane, La Grande, Oregon 98750, USA
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Sereda CW, Adin CA, Batich CD, Archer LL, Goldman CG, Burns CG. Evaluation of manufacturing variability, diffusion of filling solutions, and long-term maintenance of occlusion in silicone hydraulic occluders. Am J Vet Res 2006; 67:1453-8. [PMID: 16881861 DOI: 10.2460/ajvr.67.8.1453] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To evaluate manufacturing variability, diffusion of filling solutions, and maintenance of occlusion over time in 3 sizes of silicone hydraulic occluders (HOs). SAMPLE POPULATION 2-, 5-, and 20-mm HOs (HO2, HO5, and HO20, respectively). PROCEDURES Manufacturing variability was analyzed by comparing variation in internal luminal areas and filling volumes within each size group. Occluders were filled to 100% occlusion with air (n = 4), saline (0.9% NaCl) solution (4), or sodium hyaluronate (4) and submerged in simulated body fluid. Changes in luminal area and weight were recorded for 133 days to evaluate maintenance of occlusion. RESULTS Considerable variability in uninflated luminal area and fill volumes was observed among the 3 sizes of HOs. Loss of occlusion developed in the first 12 hours in all air-filled HOs. Fluid-filled occluders were reliable in maintenance of occlusion after 133 days (99.99% for HO20, 99.59% for HO5, and 90.40% for HO2), although diffusion of saline solution and hyaluronate from all HOs was confirmed by detection of significant decreases in weight over time. There was no significant difference in weight loss between HOs filled with saline solution and HOs filled with sodium hyaluronate. CONCLUSIONS AND CLINICAL RELEVANCE Saline solution or sodium hyaluronate may be used as a filling solution in the HOs tested. Maintenance of occlusion was best in the larger sizes. Saline solution or sodium hyaluronate should be used in future clinical investigations of HOs. Retrograde filling to remove air should be used when filling HOs with fluid.
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Affiliation(s)
- Colin W Sereda
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, 32610, USA
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da Costa RC, Pippi NL, Graça DL, Fialho SA, Alves A, Groff AC, Rezler U. The effects of free fat graft or cellulose membrane implants on laminectomy membrane formation in dogs. Vet J 2006; 171:491-9. [PMID: 16624715 DOI: 10.1016/j.tvjl.2004.12.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/03/2004] [Indexed: 11/28/2022]
Abstract
The purpose of this study was to determine the effect of cellulose membrane or free fat grafts (FFG) on laminectomy membrane (LM) formation. Eighteen dogs were randomly divided into three groups of six dogs. All dogs underwent a modified dorsal laminectomy on T(13)-L(1). The laminectomy defect was left uncovered in the control group but either a FFG or a cellulose membrane implant was provided in the other two groups. The dogs were evaluated through neurological examination, myelography, macroscopic roundness index of spinal cord and histological evaluations of epidural fibrosis and spinal cord. The results showed a significant difference between the control and the FFG group, with the FFG causing neurological deficits and spinal cord compression as assessed by the roundness index of the spinal cord. Both FFG and cellulose membrane were partially effective in preventing LM formation. The use of FFG was associated with a high rate of significant neurological complications and spinal cord lesions.
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Affiliation(s)
- Ronaldo C da Costa
- Department of Veterinary Medicine, Federal University of Paraná, Campus Palotina, Palotina, PR 85950-000, Brazil.
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Gelatt KN, MacKay EO, Widenhouse C, Widenhouse TS, Stopek JB. Effect of lacrimal punctal occlusion on tear production and tear fluorescein dilution in normal dogs. Vet Ophthalmol 2006; 9:23-7. [PMID: 16409241 DOI: 10.1111/j.1463-5224.2005.00430.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To evaluate effects of lacrimal punctal plugs positioned in either the upper, lower, or combination of upper and lower lacrimal canaliculi on plug retention and tolerance; tear production, as measured by the Schirmer tear test; and the dilution of fluorescein within the tear film in normal dogs. MATERIAL AND METHODS Lacrimal punctal plugs were positioned in the lower, upper, or combination of lower and upper plugs in six laboratory-quality Beagles under topical anesthesia. Retention of plugs was evaluated daily from 8 to 23 days by visual inspection and slit-lamp biomicroscopy. Schirmer tear tests (STT 1 without topical anesthesia) were performed at 48-h intervals. Dilution of fluorescein was determined at 5- and 45-min post-fluorescein instillations once weekly. RESULTS Lacrimal punctal plugs of 0.4 and 0.6 mm in diameter were retained for 14 (lower plugs: 100%) and 23 days (75%), and for the upper plugs at 8 days less often (75%), and were infrequently locally nonirritating. Combination of lower and upper plugs seemed to adversely affect retention of either plug. When loss of the plugs occurred, a next larger size plug was necessary suggesting some stretching of the lacrimal canaliculi occurred. Pre- and postplug placement STT results indicated no change with lower and combination lacrimal punctal plugs, but decreased levels following upper lacrimal punctal plugs. Tear fluorescein levels at 5 and 45 min in control eye (no punctum plugs) were 3.39% and 0.14%, respectively. With lower, upper, and the combination of lower and upper lacrimal puncta plugs, tear fluorescein levels at 45 min were higher than the controls (lower: 0.76%; upper: 0.45%, and combination 0.56%). CONCLUSION Lacrimal punctal silicone plugs are retained for 8-23 days in the lower, upper, and combined lower and upper canaliculi at high rates. Effects on STT levels appear limited. Fluorescein within the tear film persists longer with all different positioned lacrimal punctum plugs than in the control eyes.
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Affiliation(s)
- K N Gelatt
- Department of Small Animal Clinical Sciences, University of Florida, Gainesville, and Veterinary Medical Solutions, Pembroke Pines, FL, USA.
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Liptak JM, Ehrhart N, Santoni BG, Wheeler DL. Cortical Bone Graft and Endoprosthesis in the Distal Radius of Dogs: A Biomechanical Comparison of Two Different Limb-Sparing Techniques. Vet Surg 2006; 35:150-60. [PMID: 16472295 DOI: 10.1111/j.1532-950x.2006.00126.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To compare the biomechanical properties of cortical bone and surgical steel endoprosthesis for limb-sparing surgery of the distal radius in dogs and evaluate the role of the ulna in providing stability to the reconstructed limb. STUDY DESIGN Cadaveric biomechanical study. ANIMALS Twelve pairs of normal canine thoracic limbs. METHODS Paired limbs were divided into 4 groups: endoprosthesis and cortical bone graft, with and without preservation of the ulna. In each limb pair, the distal segment of the radius resected from the limb to be reconstructed with an endoprosthesis was used as the cortical bone graft in the contralateral limb. The ulna was resected en bloc with the radius and at the same level as the radial osteotomy in limbs where the ulna was not preserved. Limbs were tested in axial loading until failure. The load-deformation curve was used to acquire the biomechanical properties of each construct, which were compared using 2-way ANOVA. Failure modes were compared descriptively. RESULTS Limbs reconstructed with the endoprosthesis had significantly greater yield load, energy at yield, and ultimate load compared with limbs reconstructed with a cortical bone graft. There were no significant differences in either energy to failure or stiffness between the 2 constructs. Preservation of the ulna did not significantly improve any of the biomechanical properties tested with either endoprosthesis or cortical bone graft constructs. The modes of failure in all 4 groups were variable and inconsistent. CONCLUSIONS Limbs reconstructed with an endoprosthesis were biomechanically superior to limbs reconstructed with a cortical bone graft in axial loading to failure. Preservation of the ulna is not required to improve the stability in axial compression after limb-sparing surgery of the distal radius. CLINICAL RELEVANCE The endoprosthesis may provide another option for limb-sparing surgery of the distal radius in dogs. It has potential advantages when compared with cortical bone grafts, including better biomechanical performance and resistance to implant failure in axial compression, immediate availability, and no requirement for bone banking facilities. The ulna can be resected en bloc with the radius without having a negative impact on construct stability. En bloc resection of the ulna and radius may decrease the risk of local tumor recurrence after limb-sparing surgery.
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Affiliation(s)
- Julius M Liptak
- Animal Cancer Center and Department of Mechanical and Biomedical Engineering, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, USA.
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Slocum T. Questions accuracy in study of metal plate implants. J Am Vet Med Assoc 2006; 228:195; author reply 196. [PMID: 16453963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
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Voss K, Steffen F, Montavon PM. Use of the ComPact UniLock System for ventral stabilization procedures of the cervical spine: a retrospective study. Vet Comp Orthop Traumatol 2006; 19:21-8. [PMID: 16594540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
This study evaluates clinical application of the ComPact UniLock system for ventral stabilization of the cervical spine. Patient material included 13 consecutive cases, 12 dogs and one cat, with cervical spinal instabilities secondary to disc-associated wobbler syndrome (six dogs), traumatic, iatrogenic, and disc-associated cervical spinal instability of small dogs (four cases), cervical spinal fractures (one dog and one cat), and congenital atlantoaxial instability (one dog). The 2.0 system was used in smaller patients and the 2.4 system was applied in large dogs. Implant failure was observed on follow-up radiographs in one dog with a healed C2 fracture and screw pullout occurred in one dog with caudal cervical spondylomyelopathy, necessitating revision surgery. Implants remained stable throughout the follow-up period in the other cases. 'Good' or 'excellent' clinical outcome was achieved in 12 patients, including the dog with revision surgery. One dog had to be euthanatized due to postoperative deterioration of neurological status and development of pneumonia. The ComPact UniLock system was found to be a suitable implant for treating cervical instabilities of different origin in both small and large patients with lesions from C1/C2 to C6/C7. Some problems were encountered in the dogs with disc-associated Wobbler syndrome, such as lack or slow rate of vertebral fusion and partial collapse of the distracted intervertebral space on follow-up radiographs. A lack of adequate fusion was most likely related to grafting techniques used.
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Affiliation(s)
- K Voss
- Clinic for Small Animal Surgery, University of Zurich, Switzerland.
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Abstract
A 10-week-old Labrador Retriever was examined because of a swelling above the left eye. Ophthalmic examination revealed a tubular, light-pink, slightly raised lesion of the left conjunctiva that extended from the limbus to the fornix and into the dorsal eyelid. The lesion affected the entire margin of the dorsal eyelid and extended 2 cm dorsal to the eyelid margin. With compression of the left jugular vein, the exophthalmos worsened immediately and the subconjunctival and eyelid lesion enlarged. Results of ultrasonography, computed tomography, and contrast venography were consistent with a diagnosis of an orbital varix. Coil embolization was elected for treatment of the varix to prevent the pain and morbidity associated with an orbitotomy. Coils were introduced through a 22-gauge IV catheter inserted through the upper eyelid into the varix. The only complication was moderately severe orbital swelling. The owners reported that the lesion had resolved by 2 weeks after coil embolization.
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Affiliation(s)
- Elizabeth A Adkins
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, Tennessee 37996-4544, USA
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Harasen G. What's new in orthopedics in 2005--part I. Can Vet J 2005; 46:1136-7. [PMID: 16422068 PMCID: PMC2834524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Affiliation(s)
- Greg Harasen
- Animal Clinic of Regina, 1800 Garnet Street, Regina, Saskatchewan S4T 2Z2
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Small MF, Baccus JT, Mink JN, Roberson JA. HEMATOLOGIC RESPONSES IN CAPTIVE WHITE-WINGED DOVES (ZENAIDA ASIATICA), INDUCED BY VARIOUS RADIOTRANSMITTER ATTACHMENTS. J Wildl Dis 2005; 41:387-94. [PMID: 16107674 DOI: 10.7589/0090-3558-41.2.387] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
White blood cell counts, heterophil-lymphocyte ratios, and leukocyte differentials of captive white-winged doves (Zenaida asiatica) from Texas equipped with different radiotransmitter attachment packages were monitored. Doves were segregated by gender and age by males, females, and hatching year; individuals housed in 30 large outdoor pens in groups of seven. Treatments consisted of controls, glue-on transmitters, body loop harnesses, surgically implanted intracoelomic transmitters, surgically implanted subcutaneous transmitters, intracoelomic surgery without implants, and subcutaneous surgery without implants. We used multivariate analysis of variance with pen as a blocking variable and gender nested and repeated measures analysis of variance to identify differences among any of the transmitter attachment techniques and the control for dependent variables. We found no difference in blood parameters between transmitter attachment technique versus a control.
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Affiliation(s)
- Michael F Small
- Department of Biology, Texas State University-San Marcos, San Marcos, Texas 78666, USA.
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Abstract
Over the past decade, many improvements to small animal internal fracture fixation have been developed, including improved fixation techniques and a more diverse selection of implants. The understanding that appropriate fixation selection is based on a plethora of biologic, mechanical, and clinical factors has also emerged. Classically, the methods of internal fracture fixation have used pins, wires, screws, and plates to rigidly stabilize fractures that have been anatomically reduced with significant disruption to the biologic fracture environment. Newer methods attempt to minimize trauma to the soft tissues surrounding a fracture and promote biologic osteosynthesis using such implants as interlocking nails and plate-rod fixations. This review provides an overview of both the traditional and current principles of small animal internal fracture fixation.
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Affiliation(s)
- Kevin S Stiffler
- Department of Small Animal Medicine and Surgery, University of Georgia, College of Veterinary Medicine, Athens, GA, USA.
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Hwang YT, Gentes ML, Parker DL, Larivière S, Messier F. Effects of surgical implantation of temperature dataloggers on reproduction of captive striped skunks (Mephitis mephitis). J Zoo Wildl Med 2005; 35:515-9. [PMID: 15732593 DOI: 10.1638/03-075] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A total of 20 (14 females, six males) captive striped skunks (Mephitis mephitis) with miniature temperature dataloggers implanted free in the abdominal cavity were examined for reproductive performance and pathology because of implants. Eleven of 12 female skunks reproduced successfully 45.9+/-3.7 days after surgery to remove implanted dataloggers. The pregnancy rate of 91.7% (11/12) was much higher than other captive studies and was comparable with that of wild skunks. Eight striped skunks (six males, two females) that were euthanatized and necropsied after having implants in the abdominal cavity for 5 mo showed no apparent pathology associated with the implant. Implantation of the intraperitoneal devices did not lead to complications in abdominal tissues. Neither implant nor surgery affected reproduction. We conclude that implanted dataloggers can safely be used in physiologic studies of striped skunks or possibly other small carnivores in captive or field studies.
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Affiliation(s)
- Yeen Ten Hwang
- Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada
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Clabaugh K, Haag KM, Hanley CS, Latimer KS, Hernandez-Divers SJ. UNDIFFERENTIATED SARCOMA RESOLVED BY FORELIMB AMPUTATION AND PROSTHESIS IN A RADIATED TORTOISE (GEOCHELONE RADIATA). J Zoo Wildl Med 2005; 36:117-20. [PMID: 17315468 DOI: 10.1638/04-022] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An adult female, radiated tortoise (Geochelone radiata) presented with a grossly swollen left forelimb that restricted mobility and prevented limb withdrawal. Clinical pathology revealed leukopenia (1.9 x 10(9)/L) and hyperproteinemia (69 g/L) that on protein electrophoresis was attributed to increased acute-phase proteins in the alpha fraction (26.4 g/L). Biopsy revealed a poorly differentiated soft tissue sarcoma. Surgical amputation at the proximal humerus was curative. To encourage postoperative mobility, a novel methylmethacrylate prosthesis, molded from a lubricated transected tennis ball, was adhered to the plastron using three cortical bone screws. This is the first recorded case of a sarcoma in the genus Geochelone.
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Affiliation(s)
- Kelleyerin Clabaugh
- Exotic Animal, Wildlife and Zoological Medicine Service, Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, University of Georgia, Athens 30602, USA
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Rohner B, Wieling R, Magerl F, Schneider E, Steiner A. Performance of a composite flow moulded carbon fibre reinforced osteosynthesis plate. Vet Comp Orthop Traumatol 2005; 18:175-82. [PMID: 16594449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Non-metallic implants have the advantage over metallic implants of reduction in artefact with CT and MR diagnostic imaging. In-vivo performance of a carbon fibre reinforced polyetheretherketone radiolucent plate (Snake Plate [SP]) with high stiffness, and fixed angle converging screws was compared with a seven-hole titanium Locking Compression Plate (LCP), using a sheep tibial osteotomy model (gap 0.6 mm). The sheep were divided into two groups, and the osteotomies were stabilized with a SP (n = 6) or a LCP (n = 6). The callus dimensions were measured radiographically at zero, two, four, six and eight weeks. The animals were euthanatized after eight weeks. Osteotomised and contralateral tibiae were tested in pairs torsion, to determine strength and stiffness. In the radii of six separate sheep, initial vascular disturbance after plate implantation was evaluated. All of the sheep of the SP and LCP groups showed maximal callus areas at six weeks. The differences between the groups, in callus dimension, were not significant at any time point. The median values for relative reduction (100 x [operated contralateral] / contralateral) in strength of osteotomized tibiae was -13.93% for the SP group and -7.49% for the LCP group (p = 0.5228), and for stiffness it was -24.44% for the SP group and -27.08% for the LCP group (p = 0.6481). Neither the SP nor LCP caused any notable disturbance in periosteal circulation. The SP appears to represent a valuable alternative to metallic implants for shaft fracture repair. The main advantages of the SP are radiolucency, high deformation resistance, internal fixator concept and converging screw configuration for optimal loading conditions in the bone-implant construct.
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Affiliation(s)
- B Rohner
- AO Research Institute, Davos, Switzerland
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Nolen RS. Coalition presses microchip makers for global scanner. Scanner sought that reads U.S. and ISO chips. J Am Vet Med Assoc 2004; 225:1161-2. [PMID: 15521433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
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Abstract
Effects of traumatic injury or inflammation on the equine eye can be catastrophic. These ocular conditions can frequently result in blindness or chronic pain. In addition to blindness and pain, permanent unsightly cosmetic defects can occur. This article addresses options available for improved cosmetic outcome in horses with ocular scars or requiring enucleation. Many of these options have been described in detail previously. New information has been added to the discussion of each option where pertinent.
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Affiliation(s)
- Tammy Miller Michau
- Department of Ophthalmology, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, NC 27606, USA.
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Funding, framework for National Animal Identification system announced. J Am Vet Med Assoc 2004; 224:1904-5. [PMID: 15230438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
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Seno T, Izumisawa Y, Nishimura I, Maehara S, Kushiro T, Umar MA, Wakaiki S, Yamashita K, Kotani T. Fixation to the canine bone of artificial implant with new surface structure. J Vet Med Sci 2004; 66:315-8. [PMID: 15107565 DOI: 10.1292/jvms.66.315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Screw and laser (SL) column by making screw threads and forming small holes using laser irradiation on the base metal and conventional beads coating (BC) columns were embedded into the shaft of canine femurs, and compared the implant fixation to the host bone. The interfacial strength in SL columns was almost equivalent as BC columns, and bone-column contact rate was higher than BC columns significantly at twelve weeks after implantation. The newly devised SL surface had almost equivalent bone fixation strength comparable to the conventional BC surface. Also, this surface should provide a useful porous surface for use in artificial joints since there is no risk of surface structure detachment.
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Affiliation(s)
- Takahiro Seno
- Department of Veterinary Surgery I, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
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