@article{seiler_campbell_nixon_tsuruta_dayton_jennings_redding_lustgarten_2016, title={FEASIBILITY AND SAFETY OF CONTRAST-ENHANCED ULTRASOUND IN THE DISTAL LIMB OF SIX HORSES}, volume={57}, ISSN={["1740-8261"]}, DOI={10.1111/vru.12333}, abstractNote={Vascular alterations play important roles in many orthopedic diseases such as osteoarthritis, tendonitis, and synovitis in both human and equine athletes. Understanding these alterations could enhance diagnosis, prognosis, and treatment. Contrast‐enhanced ultrasound (CEUS) could be a valuable method for evaluation of blood flow and perfusion of these processes in the equine distal limb, however no reports were found describing feasibility or safety of the technique. The goal of this prospective, experimental study was to describe the feasibility and safety of distal limb CEUS in a sample of six horses. For each horse, CEUS of the distal limb was performed after intravenous injections of 5 and 10 ml, as well as intra‐arterial injections of 0.5 and 1 ml contrast medium. Vital parameters were monitored and CEUS images were assessed qualitatively and quantitatively for degree of contrast enhancement. None of the horses had clinically significant changes in their vital parameters after contrast medium injection. One horse had a transient increase in respiratory rate, and several horses had mild increases of systolic blood pressure of short duration after intravenous, but not after intra‐arterial injections. Intra‐arterial injection was possible in all horses and resulted in significantly improved contrast enhancement both quantitatively (P = 0.027) and qualitatively (P = 0.019). Findings from this study indicated that CEUS is a feasible and safe diagnostic test for evaluation of the equine distal limb. Future studies are needed to assess the clinical utility of this test for horses with musculoskeletal diseases.}, number={3}, journal={VETERINARY RADIOLOGY & ULTRASOUND}, author={Seiler, Gabriela S. and Campbell, Nigel and Nixon, Britton and Tsuruta, James K. and Dayton, Paul A. and Jennings, Samuel and Redding, W. Rich and Lustgarten, Meghann}, year={2016}, pages={282–289} }
 @article{shrauner_blikslager_davis_campbell_law_lustgarten_prange_2017, title={Feasibility and safety of lumbosacral epiduroscopy in the standing horse}, volume={49}, ISSN={["2042-3306"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84978052421&partnerID=MN8TOARS}, DOI={10.1111/evj.12591}, abstractNote={SummaryReasons for performing studyThe large size of the adult horse prevents the use of advanced imaging modalities in most areas of the axial skeleton, including the lumbosacral vertebral column. Traditional imaging techniques are frequently unable to pinpoint the underlying pathology in horses with caudal back pain. In man, lumbosacral epiduroscopy is used to diagnose and treat subjects with chronic back and leg pain. This technique may close the diagnostic gap in horses with similar clinical signs.ObjectivesTo evaluate the safety and feasibility of lumbosacral epiduroscopy in the standing adult horse.Study designDescriptive, experimental study.MethodsSeven adult horses weighing 504–578 kg were sedated and restrained in stocks in preparation for aseptic surgery. Vascular dilators of increasing size were inserted cranial to the first moveable vertebra caudal to the sacrum to facilitate a minimally invasive approach into the epidural space. A flexible video‐endoscope was introduced and advanced as far as its 60‐cm working length permitted. Pre‐, intra‐ and post‐operative plasma cortisol samples were collected, and neurological and lameness examinations were performed prior to and during the 2 weeks following the procedure. Post‐mortem examinations were conducted in 5 of the 7 horses.ResultsStanding lumbosacral epiduroscopy was well tolerated by all horses. The anatomic structures in the epidural space (dura mater, spinal nerve roots, fat and blood vessels) were followed as far cranial as the thoracolumbar region. No complications related to the procedure were noted in the 2‐week monitoring period following epiduroscopy. Small, organised haematomas were identified in the sacral epidural space during necropsy in one horse. No abnormalities were seen in the other 4 animals.ConclusionsLumbosacral epiduroscopy can be performed safely in sedated standing horses. The procedure may become a valuable diagnostic tool in horses with caudal back or hindlimb pain of unknown origin.}, number={3}, journal={EQUINE VETERINARY JOURNAL}, author={Shrauner, B. and Blikslager, A. and Davis, J. and Campbell, N. and Law, M. and Lustgarten, M. and Prange, T.}, year={2017}, month={May}, pages={322–328} }
 @article{posner_mariani_swanson_asakawa_campbell_king_2014, title={Perianesthetic morbidity and mortality in dogs undergoing cervical and thoracolumbar spinal surgery}, volume={41}, ISSN={["1467-2995"]}, url={http://dx.doi.org/10.1111/vaa.12127}, DOI={10.1111/vaa.12127}, abstractNote={OBJECTIVE
To evaluate and compare perioperative morbidity and mortality in dogs undergoing cervical and thoracolumbar spinal surgery.


STUDY DESIGN
Prospective case series.


ANIMALS
157 dogs undergoing cervical or thoracolumbar spinal surgery.


METHODS
Data were collected sequentially on canine cases presented from the Neurology Section of the North Carolina State University Veterinary Teaching Hospital for anesthesia and surgery for cervical spinal cord disease. Simultaneously, data were collected on all thoracolumbar spinal surgery cases during the same time period. Data included signalment, drugs administered, surgical approach, disease process, cardiac arrhythmias during anesthesia, and outcome.


RESULTS
Data were collected from 164 surgical events in 157 dogs. There were 52 cervical approaches; four dorsal and 48 ventral. All thoracolumbar surgeries were approached dorsolaterally. Four dogs 4/52 (7.6%) undergoing a cervical approach did not survive to discharge. Two dogs (2/8; 25%) underwent atlanto-axial (AA) stabilization and suffered cardiovascular arrest and two dogs (2/38; 5.2%) undergoing cervical ventral slot procedures were euthanized following anesthesia and surgery due to signs of aspiration pneumonia. All dogs undergoing thoracolumbar surgery survived until discharge (112/112). Mortality in dogs undergoing cervical spinal surgery was greater compared with dogs undergoing thoracolumbar spinal surgery (p = 0.009), however, in dogs undergoing decompressive disc surgery, intraoperative death rates were not different between dogs undergoing a cervical compared with thoracolumbar approaches (p = 0.32) nor was there a significant difference in overall mortality (p = 0.07).


CONCLUSION AND CLINICAL RELEVANCE
Overall, dogs undergoing cervical spinal surgery were less likely to survive until discharge compared with dogs undergoing thoracolumbar spinal surgery. Mortality in dogs undergoing cervical intervertebral disc decompression surgery was no different than for dogs undergoing thoracolumbar intervertebral disc decompression surgery. However, dogs undergoing cervical intervertebral disc decompression surgery should be considered at risk for aspiration pneumonia.}, number={2}, journal={VETERINARY ANAESTHESIA AND ANALGESIA}, author={Posner, Lysa P. and Mariani, Christopher L. and Swanson, Cliff and Asakawa, Makoto and Campbell, Nigel and King, Adam S.}, year={2014}, month={Mar}, pages={137–144} }
 @article{smith_davis_smith_gerard_campbell_foster_2010, title={Efficacy and Pharmacokinetics of Pantoprazole in Alpacas}, volume={24}, ISSN={["1939-1676"]}, url={https://doi.org/10.1111/j.1939-1676.2010.0508.x}, DOI={10.1111/j.1939-1676.2010.0508.x}, abstractNote={BACKGROUND
Despite frequent clinical use, information about the pharmacokinetics and efficacy of pantoprazole in camelids is not available.


OBJECTIVES
To examine the pharmacokinetics of both IV and SC pantoprazole and to determine whether pantoprazole administration would increase 3rd compartment pH in alpacas.


ANIMALS
Six healthy adult alpacas.


METHODS
Alpacas were fitted with a 3rd compartment cannula for measuring gastric pH. After recovery, alpacas received 1 mg/kg pantoprazole IV, q24h for 3 days or 2 mg/kg SC q24h for 3 days. Alpacas received both IV and SC pantoprazole, with a minimum of 3 weeks between treatments. Third compartment pH was recorded and plasma samples were taken for pharmacokinetic analysis.


RESULTS
Pantoprazole induced a slow but sustained increase in 3rd compartment pH when given by both the IV and SC routes. Third compartment pH was significantly increased as compared with baseline values (1.81+/-0.7; mean+/-SD) at 24 (2.47+/-0.8), 48 (3.53+/-1.0) and 72 hours (4.03+/-1.3) after daily IV administration of pantoprazole. Third compartment pH increased from 1.73+/-0.6 at baseline to 3.05+/-1.1, 4.02+/-1.4, and 3.61+/-1.6 at 24, 48, and 72 hours after SC administration, respectively. Pharmacokinetic analysis demonstrated that pantoprazole had a short elimination half-life (0.47+0.06 h) and a high clearance rate (12.2+/-2.9 mL/kg/min) after both IV and SC administration.


CONCLUSIONS AND CLINICAL RELEVANCE
Based on the results of this study, pantoprazole represents a safe and effective drug for increasing 3rd compartment pH in camelids. Either IV or SC administration is likely to be an effective treatment for gastric ulcers.}, number={4}, journal={JOURNAL OF VETERINARY INTERNAL MEDICINE}, author={Smith, G. W. and Davis, J. L. and Smith, S. M. and Gerard, M. P. and Campbell, N. B. and Foster, D. M.}, year={2010}, pages={949–955} }
 @article{mcmullen_davidson_campbell_salmon_gilger_2010, title={Evaluation of 30- and 25-diopter intraocular lens implants in equine eyes after surgical extraction of the lens}, volume={71}, ISSN={0002-9645}, url={http://dx.doi.org/10.2460/ajvr.71.7.809}, DOI={10.2460/ajvr.71.7.809}, abstractNote={Abstract
Objective—To determine appropriate intraocular lens (IOL) implant strength to approximate emmetropia in horses.
Sample Population—16 enucleated globes and 4 adult horses.
Procedures—Lens diameter of 10 enucleated globes was measured. Results were used to determine the appropriate-sized IOL implant for insertion in 6 enucleated globes and 4 eyes of adult horses. Streak retinoscopy and ocular ultrasonography were performed before and after insertion of 30-diopter (D) IOL implants (enucleated globes) and insertion of 25-D IOL implants (adult horses).
Results—In enucleated globes, mean ± SD lens diameter was 20.14 ± 0.75 mm. Preoperative and postoperative refractive state of enucleated globes with 30-D IOL implants was −0.46 ± 1.03 D and −2.47 ± 1.03 D, respectively; preoperative and postoperative difference in refraction was 2.96 ± 0.84 D. Preoperative anterior chamber (AC) depth, crystalline lens thickness (CLT), and axial globe length (AxL) were 712 ± 0.82 mm, 11.32 ± 0.81 mm, and 40.52 ± 1.26 mm, respectively; postoperative AC depth was 10.76 ± 1.16 mm. Mean ratio of preoperative to postoperative AC depth was 0.68. In eyes receiving 25-D IOL implants, preoperative and postoperative mean refractive error was 0.08 ± 0.68 D and −3.94 ± 1.88 D, respectively. Preoperative AC depth, CLT, and AxL were 6.36 ± 0.22 mm, 10.92 ± 1.92 mm, and 38.64 ± 2.59 mm, respectively. Postoperative AC depth was 8.99 ± 1.68 mm. Mean ratio of preoperative to postoperative AC depth was 0.73.
Conclusions and Clinical Relevance—Insertion of 30-D (enucleated globes) and 25-D IOL implants (adult horses) resulted in overcorrection of refractive error.}, number={7}, journal={American Journal of Veterinary Research}, publisher={American Veterinary Medical Association (AVMA)}, author={McMullen, Richard J. and Davidson, Michael G. and Campbell, Nigel B. and Salmon, Jacklyn H. and Gilger, Brian C.}, year={2010}, month={Jul}, pages={809–816} }
 @article{gardner_cook_jortner_troan_sharp_campbell_brownie_2005, title={Stringhalt associated with a pasture infested with Hypochoeris radicata}, volume={17}, DOI={10.1111/j.2042-3292.2005.tb00349.x}, abstractNote={Equine Veterinary EducationVolume 17, Issue 3 p. 118-122 Stringhalt associated with a pasture infested with Hypochoeris radicata S. Y. Gardner, Corresponding Author S. Y. Gardner Department of Clinical Sciences, Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USADepartment of Clinical Sciences, Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USASearch for more papers by this authorA. G. Cook, A. G. Cook Departments of Large Animal Clinical Sciences, Virginia Maryland Regional College of Veterinary Medicine, Virginia-Tech and University of Maryland, Blacksburg, Virginia 24061, USA Davie County Large Animal Hospital, 928 Farmington Rd, Mocksville, North Carolina 27028, USASearch for more papers by this authorB. S. Jortner, B. S. Jortner Biomedical Sciences and Pathobiology, Virginia Maryland Regional College of Veterinary Medicine, Virginia-Tech and University of Maryland, Blacksburg, Virginia 24061, USASearch for more papers by this authorB. V. Troan, B. V. Troan Department of Clinical Sciences, Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USASearch for more papers by this authorN. J. H. Sharp, N. J. H. Sharp Department of Clinical Sciences, Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USA Animal Critical Care Group, 1410 Boundary Road, Burnaby, British Columbia V5K 4V3, CanadaSearch for more papers by this authorN. B. Campbell, N. B. Campbell Department of Clinical Sciences, Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USASearch for more papers by this authorC. F. Brownie, C. F. Brownie Department of Clinical Sciences, Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USASearch for more papers by this author S. Y. Gardner, Corresponding Author S. Y. Gardner Department of Clinical Sciences, Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USADepartment of Clinical Sciences, Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USASearch for more papers by this authorA. G. Cook, A. G. Cook Departments of Large Animal Clinical Sciences, Virginia Maryland Regional College of Veterinary Medicine, Virginia-Tech and University of Maryland, Blacksburg, Virginia 24061, USA Davie County Large Animal Hospital, 928 Farmington Rd, Mocksville, North Carolina 27028, USASearch for more papers by this authorB. S. Jortner, B. S. Jortner Biomedical Sciences and Pathobiology, Virginia Maryland Regional College of Veterinary Medicine, Virginia-Tech and University of Maryland, Blacksburg, Virginia 24061, USASearch for more papers by this authorB. V. Troan, B. V. Troan Department of Clinical Sciences, Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USASearch for more papers by this authorN. J. H. Sharp, N. J. H. Sharp Department of Clinical Sciences, Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USA Animal Critical Care Group, 1410 Boundary Road, Burnaby, British Columbia V5K 4V3, CanadaSearch for more papers by this authorN. B. Campbell, N. B. Campbell Department of Clinical Sciences, Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USASearch for more papers by this authorC. F. Brownie, C. F. Brownie Department of Clinical Sciences, Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USASearch for more papers by this author First published: 05 January 2010 https://doi.org/10.1111/j.2042-3292.2005.tb00349.xCitations: 9 AboutPDF ToolsExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Citing Literature Volume17, Issue3June 2005Pages 118-122 RelatedInformation}, number={3}, journal={Equine Veterinary Education}, author={Gardner, S. Y. and Cook, A. G. and Jortner, B. S. and Troan, B. V. and Sharp, N. J. H. and Campbell, N. B. and Brownie, C. F.}, year={2005}, pages={118–122} }
 @article{carter_campbell_posner_swanson_2010, title={The hemodynamic effects of medetomidine continuous rate infusions in the dog}, volume={37}, ISSN={["1467-2995"]}, DOI={10.1111/j.1467-2995.2009.00522.x}, abstractNote={OBJECTIVE
To characterize the hemodynamic effects of continuous rate infusions (CRI) of medetomidine administered at doses ranging from 0 to 3 microg kg(-1) hour(-1).


STUDY DESIGN
Prospective, blinded, randomized experimental trial.


ANIMALS
Six adult purpose-bred mongrel dogs.


METHODS
Anesthesia was induced with sevoflurane for placement of arterial and venous catheters. Dogs recovered from anesthesia after which baseline hemodynamic measurements were obtained via lithium dilution cardiac output (CO) determination, with subsequent measurements via pulse power analysis to provide continuous CO determinations. Medetomidine, 1, 2, or 3 microg kg(-1) hour(-1) or a volume equivalent placebo, was administered via CRI for 60 minutes. Systolic, mean, and diastolic arterial pressure, heart rate (HR), CO and stroke volume were measured and stroke index (SI), cardiac index (CI), total peripheral resistance (TPR), and total peripheral resistance index (TPRI) were calculated at 3, 7, 10, 20, 30, 45, 60, 90, and 120 minutes from the start of the infusion.


RESULTS
Increase in dose decreased SI by 25%, 19%, and 30%, HR by 33%, 57%, and 60%, CI by 50%, 65%, 70% and increased TPRI by 109%, 235%, and 222% from baseline to the 60-minute measurement for the 1, 2, and 3 microg kg(-1) hour(-1) doses, respectively. HR, TPRI, and CI all showed significant differences over the duration of the study from the placebo treatment.


CONCLUSIONS
Medetomidine CRI produces clinically relevant changes in CO, TPR, and HR. The demonstrated decrease in CO is largely because of bradycardia and the degree of cardiovascular depression appears to be dose-dependent. These findings are consistent with previously described hemodynamic changes with single bolus administration of medetomidine.


CLINICAL RELEVANCE
Low-dose medetomidine CRIs produce clinically relevant hemodynamic depression at doses as low as 1 microg kg(-1) hour(-1) and should be used cautiously in dogs.}, number={3}, journal={VETERINARY ANAESTHESIA AND ANALGESIA}, author={Carter, Jennifer E. and Campbell, Nigel B. and Posner, Lysa P. and Swanson, Cliff}, year={2010}, month={May}, pages={197–206} }
 @article{davis_marshall_papich_blikslager_campbell_2011, title={The pharmacokinetics and in vitro cyclooxygenase selectivity of deracoxib in horses}, volume={34}, ISSN={0140-7783}, url={http://dx.doi.org/10.1111/j.1365-2885.2010.01185.x}, DOI={10.1111/j.1365-2885.2010.01185.x}, abstractNote={Davis, J. L., Marshall, J. F., Papich, M. G., Blikslager, A. T., Campbell, N. B. The pharmacokinetics and in vitro cyclooxygenase selectivity of deracoxib in horses. J. vet. Pharmacol. Therap.34, 12–16.The purpose of this study was to determine the pharmacokinetics of deracoxib following oral administration to horses. In addition, in vitro equine whole blood cyclooxygenase (COX) selectivity assays were performed. Six healthy adult horses were administered deracoxib (2 mg/kg) orally. Plasma samples were collected prior to drug administration (time 0), and 10, 20, 40 min and 1, 1.5, 2, 4, 6, 8, 12, 24, and 48 h after administration for analysis with high pressure liquid chromatography using ultraviolet detection. Following PO administration, deracoxib had a long elimination half‐life (t1/2k10) of 12.49 ± 1.84 h. The average maximum plasma concentration (Cmax) was 0.54 μg/mL, and was reached at 6.33 ± 3.44 h. Bioavailability was not determined because of the lack of an IV formulation. Results of in vitro COX selectivity assays showed that deracoxib was selective for COX‐2 with a COX‐1/COX‐2 ratio of 25.67 and 22.06 for the IC50 and IC80, respectively. Dosing simulations showed that concentrations above the IC80 for COX‐2 would be maintained following 2 mg/kg PO q12h, and above the IC50 following 2 mg/kg PO q24h. This study showed that deracoxib is absorbed in the horse after oral administration, and may offer a useful alternative for anti‐inflammatory treatment of various conditions in the horse.}, number={1}, journal={Journal of Veterinary Pharmacology and Therapeutics}, publisher={Wiley}, author={Davis, J. L. and Marshall, J. F. and Papich, M. G. and Blikslager, A. T. and Campbell, N. B.}, year={2011}, month={Jan}, pages={12–16} }
 @article{cook_jones shults_mcdowell_campbell_davis_marshall_blikslager_2009, title={Anti-inflammatory effects of intravenously administered lidocaine hydrochloride on ischemia-injured jejunum in horses}, volume={70}, ISSN={0002-9645}, url={http://dx.doi.org/10.2460/ajvr.70.10.1259}, DOI={10.2460/ajvr.70.10.1259}, abstractNote={Abstract
Objective—To investigate effects of lidocaine hydrochloride administered IV on mucosal inflammation in ischemia-injured jejunum of horses treated with flunixin meglumine.
Animals—24 horses.
Procedures—Horses received saline (0.9% NaCl) solution (SS; 1 mL/50 kg, IV [1 dose]), flunixin meglumine (1 mg/kg, IV, q 12 h), lidocaine (bolus [1.3 mg/kg] and constant rate infusion [0.05 mg/kg/min], IV, during and after recovery from surgery), or both flunixin and lidocaine (n = 6/group). During surgery, blood flow was occluded for 2 hours in 2 sections of jejunum in each horse. Uninjured and ischemia-injured jejunal specimens were collected after the ischemic period and after euthanasia 18 hours later for histologic assessment and determination of cyclooxygenase (COX) expression (via western blot procedures). Plasma samples collected prior to (baseline) and 8 hours after the ischemic period were analyzed for prostanoid concentrations.
Results—Immediately after the ischemic period, COX-2 expression in horses treated with lidocaine alone was significantly less than expression in horses treated with SS or flunixin alone. Eighteen hours after the ischemic period, mucosal neutrophil counts in horses treated with flunixin alone were significantly higher than counts in other treatment groups. Compared with baseline plasma concentrations, postischemia prostaglandin E2 metabolite and thromboxane B2 concentrations increased in horses treated with SS and in horses treated with SS or lidocaine alone, respectively.
Conclusions and Clinical Relevance—In horses with ischemia-injured jejunum, lidocaine administered IV reduced plasma prostaglandin E2 metabolite concentration and mucosal COX-2 expression. Coadministration of lidocaine with flunixin ameliorated the flunixin-induced increase in mucosal neutrophil counts.}, number={10}, journal={American Journal of Veterinary Research}, publisher={American Veterinary Medical Association (AVMA)}, author={Cook, Vanessa L. and Jones Shults, Jennifer and McDowell, Marsha R. and Campbell, Nigel B. and Davis, Jennifer L. and Marshall, John F. and Blikslager, Anthony T.}, year={2009}, month={Oct}, pages={1259–1268} }
 @article{cook_meyer_campbell_blikslager_2009, title={Effect of firocoxib or flunixin meglumine on recovery of ischemic-injured equine jejunum}, volume={70}, ISSN={0002-9645}, url={http://dx.doi.org/10.2460/ajvr.70.8.992}, DOI={10.2460/ajvr.70.8.992}, abstractNote={Abstract
Objective—To determine whether treatment of horses with firocoxib affects recovery of ischemic-injured jejunum, while providing effective analgesia.
Animals—18 horses.
Procedures—Horses (n = 6 horses/group) received saline (0.9% NaCl) solution (1 mL/50 kg, IV), flunixin meglumine (1.1 mg/kg, IV, q 12 h), or firocoxib (0.09 mg/kg, IV, q 24 h) before 2 hours of jejunal ischemia. Horses were monitored via pain scores and received butorphanol for analgesia. After 18 hours, ischemic-injured and control mucosa were placed in Ussing chambers for measurement of transepithelial resistance and permeability to lipopolysaccharide. Histomorphometry was used to determine denuded villus surface area. Western blots for cyclooxygenase (COX)-1 and COX-2 were performed. Plasma thromboxane B2 and prostaglandin E2 metabolite (PGEM) concentrations were determined.
Results—Pain scores did not significantly increase after surgery in horses receiving flunixin meglumine or firocoxib. Transepithelial resistance of ischemic-injured jejunum from horses treated with flunixin meglumine was significantly lower than in saline- or firocoxib-treated horses. Lipopolysaccharide permeability across ischemic-injured mucosa was significantly increased in horses treated with flunixin meglumine. Treatment did not affect epithelial restitution. Cyclooxygenase-1 was constitutively expressed and COX-2 was upregulated after 2 hours of ischemia. Thromboxane B2 concentration decreased with flunixin meglumine treatment but increased with firocoxib or saline treatment. Flunixin meglumine and firocoxib prevented an increase in PGEM concentration after surgery.
Conclusions and Clinical Relevance—Flunixin meglumine retarded mucosal recovery in ischemic-injured jejunum, whereas firocoxib did not. Flunixin meglumine and firocoxib were effective visceral analgesics. Firocoxib may be advantageous in horses recovering from ischemic intestinal injury.}, number={8}, journal={American Journal of Veterinary Research}, publisher={American Veterinary Medical Association (AVMA)}, author={Cook, Vanessa L. and Meyer, Colleen T. and Campbell, Nigel B. and Blikslager, Anthony T.}, year={2009}, month={Aug}, pages={992–1000} }
 @article{smith_gerard_campbell_foster_smith_davis_2009, title={Third-compartment cannulation in alpacas using a polyurethane gastrostomy tube}, volume={87}, ISSN={["1751-0813"]}, url={https://doi.org/10.1111/j.1751-0813.2009.00510.x}, DOI={10.1111/j.1751-0813.2009.00510.x}, abstractNote={Objective To develop a simple and effective surgical technique for third‐compartment cannulation in alpacas.Design Prospective study using six adult male alpacas.Methods General anaesthesia was induced and a polyurethane gastrostomy tube was surgically implanted into the distal portion of the third compartment.Results Three of the alpacas retained their cannulas for a 100‐day period; however, three cannulas were dislodged during the study. Two of the three dislodged cannulas were replaced during a second surgical procedure. Cannulas were well tolerated by the alpacas and all animals remained clinically healthy during the study period. Third compartment contents did not leak from the cannulation site. The tubes were manually removed following the completion of the study and the small defect in the body wall quickly healed over in all animals.Conclusion Surgical placement of polyurethane tubes designed for percutaneous endoscopic gastrostomy is a useful method of cannulating the third compartment in camelids. This technique can be used for experimental studies and possibly could be used for nutritional support and fluid therapy in sick camelids that might need long‐term care.}, number={12}, journal={AUSTRALIAN VETERINARY JOURNAL}, author={Smith, G. W. and Gerard, M. P. and Campbell, N. B. and Foster, D. M. and Smith, S. M. and Davis, J. L.}, year={2009}, month={Dec}, pages={487–491} }
 @article{cook_shults_mcdowell_campbell_davis_blikslager_2008, title={Attenuation of ischaemic injury in the equine jejunum by administration of systemic lidocaine}, volume={40}, DOI={10.2746/04251640SX293574}, number={4}, journal={Equine Veterinary Journal}, author={Cook, V. L. and Shults, J. J. and McDowell, M. and Campbell, N. B. and Davis, J. L. and Blikslager, Anthony}, year={2008}, pages={353–357} }
 @article{bolotin_buckner_jardine_kiefer_campbell_kocherginsky_raman_jeevanandam_2007, title={A novel instrumented retractor to monitor tissue-disruptive forces during lateral thoracotomy}, volume={133}, ISSN={["1097-685X"]}, DOI={10.1016/j.jtcvs.2006.09.065}, abstractNote={Acute and chronic pain after thoracotomy, post-thoracotomy pain syndrome, is well documented. The mechanical retractors used for the thoracotomy exert significant forces on the skeletal cage. Our hypothesis was that instrumented retractors could be developed to enable real-time monitoring and control of retraction forces. This would provide equivalent exposure with significantly reduced forces and tissue damage and thus less post-thoracotomy pain.A novel instrumented retractor was designed and fabricated to enable real-time force monitoring during surgical retraction. Eight mature sheep underwent bilateral thoracotomy. One lateral thoracotomy was retracted at a standard clinical pace of 5.93 +/- 0.80 minutes to 7.5 cm without real-time monitoring of retraction forces. The other lateral thoracotomy was retracted to the same exposure with real-time visual force feedback and a consequently more deliberate pace of 9.87 +/- 1.89 minutes (P = .006). Retraction forces, blood pressure, and heart rate were monitored throughout the procedure.Full lateral retraction resulted in an average force of 102.88 +/- 50.36 N at the standard clinical pace, versus 77.88 +/- 38.85 N with force feedback (a 24.3% reduction, P = .006). Standard retraction produced peak forces of 450.01 +/- 129.58 N, whereas force feedback yielded peak forces of 323.99 +/- 127.79 N (a 28.0% reduction, P = .009). Systolic blood pressure was significantly higher during standard clinical retraction (P = .0097), and rib fracture occurrences were reduced from 5 to 1 with force feedback (P = .04).Use of the novel instrumented retractor resulted in significantly lower average and peak retraction forces during lateral thoracotomy. Moreover, these reduced retraction forces were correlated with reductions in animal stress and tissue damage, as documented by lower systolic blood pressures and fewer rib fractures.}, number={4}, journal={JOURNAL OF THORACIC AND CARDIOVASCULAR SURGERY}, author={Bolotin, Gil and Buckner, Gregory D. and Jardine, Nicholas J. and Kiefer, Aaron J. and Campbell, Nigel B. and Kocherginsky, Masha and Raman, Jai and Jeevanandam, Valluvan}, year={2007}, month={Apr}, pages={949–954} }
 @article{little_brown_campbell_moeser_davis_blikslager_2007, title={Effects of the cyclooxygenase inhibitor meloxicam on recovery of ischemia-injured equine jejunum}, volume={68}, ISSN={0002-9645}, url={http://dx.doi.org/10.2460/ajvr.68.6.614}, DOI={10.2460/ajvr.68.6.614}, abstractNote={Abstract
Objective—To determine the effect of meloxicam and flunixin meglumine on recovery of ischemia-injured equine jejunum.
Animals—18 horses.
Procedures—Horses received butorphanol tartrate; were treated IV with saline (0.9% NaCl) solution (SS; 12 mL; n = 6), flunixin meglumine (1.1 mg/kg; 6), or meloxicam (0.6 mg/kg; 6) 1 hour before ischemia was induced for 2 hours in a portion of jejunum; and were allowed to recover for 18 hours. Flunixin and SS treatments were repeated after 12 hours; all 3 treatments were administered immediately prior to euthanasia. Selected clinical variables, postoperative pain scores, and meloxicam pharmacokinetic data were evaluated. After euthanasia, assessment of epithelial barrier function, histologic evaluation, and western blot analysis of ischemia-injured and control jejunal mucosa samples from the 3 groups were performed.
Results—Meloxicam- or flunixin-treated horses had improved postoperative pain scores and clinical variables, compared with SS-treated horses. Recovery of transepithelial barrier function in ischemia-injured jejunum was inhibited by flunixin but permitted similarly by meloxicam and SS treatments. Eighteen hours after cessation of ischemia, numbers of neutrophils in ischemia-injured tissue were higher in horses treated with meloxicam or flu-nixin than SS. Plasma meloxicam concentrations were similar to those reported previously, but clearance was slower. Changes in expression of proteins associated with inflammatory responses to ischemic injury and with different drug treatments occurred, suggesting cy-clooxygenase-independent effects.
Conclusions and Clinical Relevance—Although further assessment is needed, these data have suggested that IV administration of meloxicam may be a useful alternative to flunixin meglumine for postoperative treatment of horses with colic.}, number={6}, journal={American Journal of Veterinary Research}, publisher={American Veterinary Medical Association (AVMA)}, author={Little, Dianne and Brown, S. Aubrey and Campbell, Nigel B. and Moeser, Adam J. and Davis, Jennifer L. and Blikslager, Anthony T.}, year={2007}, month={Jun}, pages={614–624} }
 @article{kiser_nifong_raman_kasirajan_campbell_chitwood_2008, title={Evaluation of a novel epicardial atrial fibrillation treatment system}, volume={85}, ISSN={["0003-4975"]}, DOI={10.1016/j.athoracsur.2007.05.061}, abstractNote={PurposeSurgical and catheter treatments for atrial fibrillation remain invasive or ineffective for most patients. A novel system developed to create epicardial ablation lesions during beating-heart surgical procedures was evaluated in an in vivo ovine model.DescriptionThis novel ablation device integrates radiofrequency, suction, and perfusion to create transmural lesions by remaining consistently in contact with the irregular and curved surface of the beating heart.EvaluationTwo epicardial ablation patterns were generated in five adult sheep: left atrial appendage and left pulmonary vein isolation. The 2-cm and 5-cm coagulation devices generated linear and curved lesions and maintained intimate contact against the epicardium using suction. Significant increases in bipolar pacing thresholds demonstrated trans-lesion conduction block in all animals. Histopathologic examination verified transmurality and showed changes normally observed after coagulation procedures. All lesions demonstrated mural degeneration throughout the lesion. No charring, vaporization, thromboembolic events, nor other complications were observed.ConclusionsThis novel epicardial coagulation system successfully created continuous and transmural atrial lesions in a beating-heart ovine model. Surgical and catheter treatments for atrial fibrillation remain invasive or ineffective for most patients. A novel system developed to create epicardial ablation lesions during beating-heart surgical procedures was evaluated in an in vivo ovine model. This novel ablation device integrates radiofrequency, suction, and perfusion to create transmural lesions by remaining consistently in contact with the irregular and curved surface of the beating heart. Two epicardial ablation patterns were generated in five adult sheep: left atrial appendage and left pulmonary vein isolation. The 2-cm and 5-cm coagulation devices generated linear and curved lesions and maintained intimate contact against the epicardium using suction. Significant increases in bipolar pacing thresholds demonstrated trans-lesion conduction block in all animals. Histopathologic examination verified transmurality and showed changes normally observed after coagulation procedures. All lesions demonstrated mural degeneration throughout the lesion. No charring, vaporization, thromboembolic events, nor other complications were observed. This novel epicardial coagulation system successfully created continuous and transmural atrial lesions in a beating-heart ovine model.}, number={1}, journal={ANNALS OF THORACIC SURGERY}, author={Kiser, Andy C. and Nifong, L. Wiley and Raman, Jai and Kasirajan, Vigneshwar and Campbell, Nigel and Chitwood, W. Randolph, Jr.}, year={2008}, month={Jan}, pages={300–304} }
 @article{davis_papich_morton_gayle_blikslager_campbell_2007, title={Pharmacokinetics of etodolac in the horse following oral and intravenous administration}, volume={30}, ISSN={0140-7783 1365-2885}, url={http://dx.doi.org/10.1111/j.1365-2885.2007.00811.x}, DOI={10.1111/j.1365-2885.2007.00811.x}, abstractNote={The purpose of this study was to determine the pharmacokinetics of etodolac following oral and intravenous administration to six horses. Additionally,in vitrocyclooxygenase (COX) selectivity assays were performed using equine whole blood. Using a randomized two‐way crossover design, horses were administered etodolac (20 mg/kg) orally or intravenously, with a minimum 3‐week washout period. Plasma samples were collected after administration for analysis using high pressure liquid chromatography with ultraviolet detection. Following intravenous administration, etodolac had a mean plasma half‐life (t1/2) of 2.67 h, volume of distribution (Vd) of 0.29 L/kg and clearance (Cl) of 234.87 mL/h kg. Following oral administration, the average maximum plasma concentration (Cmax) was 32.57 μg/mL with at1/2of 3.02 h. Bioavailability was approximately 77.02%. Results ofin vitroCOX selectivity assays showed that etodolac was only slightly selective for COX‐2 with a COX‐1/COX‐2 selectivity ratio effective concentration (EC)50of 4.32 and for EC80of 4.77. This study showed that etodolac is well absorbed in the horse after oral administration, and may offer a useful alternative for anti‐inflammatory treatment of various conditions in the horse.}, number={1}, journal={Journal of Veterinary Pharmacology and Therapeutics}, publisher={Wiley}, author={Davis, J. L. and Papich, M. G. and Morton, A. J. and Gayle, J. and Blikslager, A. T. and Campbell, N. B.}, year={2007}, month={Feb}, pages={43–48} }
 @article{campbell_ruaux_shifflett_steiner_williams_blikslager_2004, title={Physiological concentrations of bile salts inhibit recovery of ischemic-injured porcine ileum}, volume={287}, ISSN={0193-1857 1522-1547}, url={http://dx.doi.org/10.1152/ajpgi.00310.2003}, DOI={10.1152/ajpgi.00310.2003}, abstractNote={We have previously shown rapid in vitro recovery of barrier function in porcine ischemic-injured ileal mucosa, attributable principally to reductions in paracellular permeability. However, these experiments did not take into account the effects of luminal contents, such as bile salts. Therefore, the objective of this study was to evaluate the role of physiological concentrations of deoxycholic acid in recovery of mucosal barrier function. Porcine ileum was subjected to 45 min of ischemia, after which mucosa was mounted in Ussing chambers and exposed to varying concentrations of deoxycholic acid. The ischemic episode resulted in significant reductions in transepithelial electrical resistance (TER), which recovered to control levels of TER within 120 min, associated with significant reductions in mucosal-to-serosal3H-labeled mannitol flux. However, treatment of ischemic-injured tissues with 10−5M deoxycholic acid significantly inhibited recovery of TER with significant increases in mucosal-to-serosal3H-labeled mannitol flux, whereas 10−6M deoxycholic acid had no effect. Histological evaluation at 120 min revealed complete restitution regardless of treatment, indicating that the breakdown in barrier function was due to changes in paracellular permeability. Similar effects were noted with the application of 10−5M taurodeoxycholic acid, and the effects of deoxycholic acid were reversed with application of the Ca2+-mobilizing agent thapsigargin. Deoxycholic acid at physiological concentrations significantly impairs recovery of epithelial barrier function by an effect on paracellular pathways, and these effects appear to be Ca2+dependent.}, number={2}, journal={American Journal of Physiology-Gastrointestinal and Liver Physiology}, publisher={American Physiological Society}, author={Campbell, Nigel B. and Ruaux, Craig G. and Shifflett, Donnie E. and Steiner, Jöerg M. and Williams, David A. and Blikslager, Anthony T.}, year={2004}, month={Aug}, pages={G399–G407} }
 @article{morton_campbell_gayle_redding_blikslager_2005, title={Preferential and non-selective cyclooxygenase inhibitors reduce inflammation during lipopolysaccharide-induced synovitis}, volume={78}, ISSN={0034-5288}, url={http://dx.doi.org/10.1016/j.rvsc.2004.07.006}, DOI={10.1016/j.rvsc.2004.07.006}, abstractNote={Synovitis in horses is frequently treated by administration of non-steroidal anti-inflammatory drugs (NSAIDs), which inhibit cyclooxygenase isoforms (COX-1 and COX-2). Constitutively expressed COX-1 is involved in physiologic functions such as maintenance of gastric mucosal integrity, whereas COX-2 is up-regulated at sites of inflammation. Thus, COX-2 inhibitors reduce inflammation with reduced gastrointestinal side effects as compared to non-selective COX inhibitors. The objective of the present study was to compare the anti-inflammatory effects of the preferential COX-2 inhibitor etodolac with the non-selective COX inhibitor phenylbutazone in horses with lipopolysaccharide (LPS)-induced synovitis. Three groups of horses (n=6) received no treatment, phenylbutazone (4.4 mg/kg, IV, q12h), or etodolac (23 mg/kg, IV, q12h), respectively, 2-h following injection of LPS into one middle carpal joint. Synovial fluid was analyzed for white blood cell (WBC) count, and TXB2 and PGE2 levels. Phenylbutazone and etodolac significantly reduced WBC count 6 and 24-h following injection of LPS compared to untreated horses. In addition, both drugs significantly reduced PGE2 levels (P<0.05) 6-h following LPS injection, whereas the probable COX-1 prostanoid TXB2 was significantly reduced by phenylbutazone (P<0.05), but not etodolac. Etodolac may serve as a more selective anti-inflammatory agent than phenylbutazone for treatment of equine synovitis.}, number={2}, journal={Research in Veterinary Science}, publisher={Elsevier BV}, author={Morton, Alison J. and Campbell, Nigel B. and Gayle, J’mai M. and Redding, W. Rich and Blikslager, Anthony T.}, year={2005}, month={Apr}, pages={189–192} }
 @article{campbell_jones_blikslager_2002, title={The effects of cyclo-oxygenase inhibitors on bile-injured and normal equine colon}, volume={34}, ISSN={["0425-1644"]}, DOI={10.2746/042516402776117737}, abstractNote={SummaryA potential adverse effect of cyclo‐oxygenase (COX) inhibitors (nonsteroidal anti‐inflammatory drugs [NSAIDs]) in horses is colitis. In addition, we have previously shown an important role for COX‐produced prostanoids in recovery of ischaemic‐injured equine jejunum. It was hypothesised that the nonselective COX inhibitor flunixin would retard repair of bile‐injured colon by preventing production of reparative prostaglandins, whereas the selective COX‐2 inhibitor, etodolac would not inhibit repair as a result of continued COX‐1 activity. Segments of the pelvic flexure were exposed to 1.5 mmol/l deoxycholate for 30 min, after which they were recovered for 4 h in Ussing chambers. Contrary to the proposed hypothesis, recovery of bile‐injured colonic mucosa was not affected by flunixin or etodolac, despite significantly depressed prostanoid production. However, treatment of control tissue with flunixin led to increases in mucosal permeability, whereas treatment with etodolac had no significant effect. Therefore, although recovery from bile‐induced colonic injury maybe independent of COX‐elaborated prostanoids, treatment of control tissues with nonselective COX inhibitors may lead to marked increases in permeability. Alternatively, selective inhibition of COX‐2 may reduce the incidence of adverse effects in horses requiring NSAID therapy.}, number={5}, journal={EQUINE VETERINARY JOURNAL}, author={Campbell, NB and Jones, SL and Blikslager, AT}, year={2002}, month={Jul}, pages={493–498} }
 @article{campbell_blikslager_2000, title={The role of cyclooxygenase inhibitors in repair of ischaemic-injured jejunal mucosa in the horse}, ISBN={0425-1644}, DOI={10.1111/j.2042-3306.2000.tb05335.x}, abstractNote={SummaryCyclooxygenase inhibitors are administered to horses to prevent endotoxin‐induced elaboration of prostaglandins. However, PGE2and PGI2stimulate repair of injured intestine. There are 2 isoforms of cyclooxygenase: COX‐1, which constitutively produces prostaglandins and COX‐2, which is induced by inflammation. We hypothesised that the nonspecific cyclooxygenase inhibitor flunixin meglumine would retard repair of ischaemic intestinal injury by preventing production of reparative prostaglandins, whereas the selective COX‐2 inhibitor, etodolac, would permit repair as a result of continued COX‐1 prostaglandin production. Segments of equine jejunum were subjected to ischaemia for 1 h, and recovered for 4 h in Ussing chambers. In ischaemic tissue, treated with the nonspecific cyclooxygenase inhibitor, flunixin meglumine (2.7 times 10−5mol/1), production of PGE2and PGI2was inhibited, and there was no evidence of recovery based on measurements of transepithelial resistance. Conversely, untreated ischaemic tissues or tissues treated with the specific COX‐2 inhibitor etodolac (2.7 times 10−5mol/1) had significant elevations in PGE2and PGI2, and significant recovery of transepithelial resistance. These studies suggest that specific COX‐2 inhibitors may provide an advantageous alternative to nonspecific cyclooxygenase inhibitors in horses with colic.}, journal={Equine Veterinary Journal}, author={Campbell, N. B. and Blikslager, A. T.}, year={2000}, pages={59} }
 @article{schramme_hunter_campbell_blikslager_smith, title={surgical tendonitis model in horses: Techinque, clinical, ultrasonographic and histological characterisation}, volume={23}, number={4}, journal={Veterinary and Comparative Orthopaedics and Traumatology}, author={Schramme, M. and Hunter, S. and Campbell, N. and Blikslager, A. and Smith, R.}, pages={231–239} }