10 results on '"Richard D. Mitchell"'
Search Results
2. Outcome of palmar/plantar digital neurectomy in horses with foot pain evaluated with magnetic resonance imaging: 50 cases (2005-2011)
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N. A. White, Sarah J. Gold, Richard D. Mitchell, Santiago D. Gutierrez-Nibeyro, A. K. Allen, Mark A. Mitchell, Natasha M. Werpy, and R. B. Edwards
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medicine.medical_specialty ,Core (anatomy) ,medicine.diagnostic_test ,business.industry ,medicine.medical_treatment ,Medical record ,Foot lesions ,Neurectomy ,Magnetic resonance imaging ,Retrospective cohort study ,General Medicine ,Surgery ,Lameness ,medicine ,business ,Foot (unit) - Abstract
SummaryReasons for performing study There is limited knowledge of the foot lesions that influence the outcome of palmar/plantar digital neurectomy (PDN). Objectives 1) To report the short- and long-term outcomes of horses that underwent PDN to alleviate chronic foot pain due to lesions diagnosed by magnetic resonance imaging (MRI) and 2) factors that may influence the outcome of PDN. Study design Multicentre retrospective study. Methods Medical records of 50 horses subjected to PDN due to chronic foot pain were reviewed. Age, breed, sex, athletic activity, duration of lameness, affected limb(s), response to anaesthesia of the palmar/plantar digital nerves, MRI findings and surgical technique were analysed together with follow-up data to identify factors that influenced the long-term outcomes. Results Forty-six of 50 horses (92%) responded positively to surgery; 40 (80%) were able to return to their previous athletic use for a median time of 20 months (range: 12–72 months). Eighteen (36%) horses developed post operative complications including residual lameness, painful neuromas, or early recurrence of lameness. Horses with pre-existing core or linear lesions of the deep digital flexor tendon (DDFT) had significantly shorter periods of lameness resolution after surgery than horses with dorsal border lesions of the DDFT or other foot lesions. Conclusions Palmar/plantar digital neurectomy can improve or resolve lameness in horses with foot pain unresponsive to medical therapy without serious post operative complications. However, horses with core or linear lesions of the DDFT should not be subjected to PDN as these horses experience residual lameness or early recurrent lameness after surgery. Magnetic resonance imaging can be used to identify these horses.
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- 2014
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3. CLINICAL SIGNIFICANCE AND PROGNOSIS OF DEEP DIGITAL FLEXOR TENDINOPATHY ASSESSED OVER TIME USING MRI
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Lea Walker, Sarah J. Gold, Julien Olive, Richard D. Mitchell, and Maïa Vanel
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medicine.medical_specialty ,General Veterinary ,medicine.diagnostic_test ,business.industry ,Magnetic resonance imaging ,medicine.disease ,Hyperintensity ,Tendon ,Surgery ,Lesion ,medicine.anatomical_structure ,Lameness ,Concomitant ,medicine ,Clinical significance ,Radiology ,medicine.symptom ,Tendinopathy ,business - Abstract
Deep digital flexor (DDF) tendinopathy is one of the most frequent causes of foot lameness and the prognosis is guarded. The progress of lesion healing may be followed by magnetic resonance (MR) imaging to formulate a prognosis and to adapt the rehabilitation program. We assessed the correlation of outcome with total tendon damage and temporal resolution of MR abnormalities. Images from 34 horses with DDF tendinopathy that had undergone at least two low-field standing MR examinations of the foot (mean 2.5 ± 1.3 times) were reviewed. No horse having a T1-GRE hyperintense lesion over 30 mm in length or over 10% tendon cross-sectional area returned to its previous activity level. Horses with concomitant lesions had worse outcome than horses with DDF tendinopathy only (P = 0.005). In all horses including those with excellent outcome, the lesion persisted, even mildly, in T1-GRE and PD images. Horses with tendon lesion resolution on STIR-FSE and T2-FSE images on recheck examination had a better outcome (P = 0.0004 and P = 0.002, respectively), and all horses that returned to their previous level of performance had complete resolution of signal hyperintensity on the STIR-FSE sequence. Although rehabilitation remains multifactorial, characteristics of DDF tendinopathy and concomitant lesions on first and recheck MR examinations allow refining the prognosis.
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- 2012
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4. Learning Through Play and Pleasure Travel: Using Play Literature to Enhance Research into Touristic Learning
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Richard D. Mitchell
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business.industry ,Tourism, Leisure and Hospitality Management ,media_common.quotation_subject ,Geography, Planning and Development ,Active learning ,Advertising ,Learning through play ,Sociology ,Public relations ,business ,Tourism ,Pleasure ,media_common - Abstract
Learning is increasingly seen as an important motivation for tourism, however, little is known about touristic learning. While descriptions are available, few have attempted to establish why it has become important or to distil theoretical foundations that can explain both its form and existence. Establishing a theoretical framework for touristic learning will assist in the development of products that better fulfil both consumers' needs and providers' objectives and perhaps illuminate our understanding of learning that is more incidental. Indeed, beyond this, a greater understanding of touristic learning may also provide new insight on why people travel at all. This paper discusses learning as a motivation for tourism and advocates the use of the notions of tourism as play and learning through play to enhance future research into touristic learning.
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- 1998
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5. Clinical significance and prognosis of deep digital flexor tendinopathy assessed over time using MRI
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Maïa, Vanel, Julien, Olive, Sarah, Gold, Richard D, Mitchell, and Lea, Walker
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Foot Diseases ,Lameness, Animal ,Tendinopathy ,Animals ,Horse Diseases ,Horses ,Prognosis ,Magnetic Resonance Imaging - Abstract
Deep digital flexor (DDF) tendinopathy is one of the most frequent causes of foot lameness and the prognosis is guarded. The progress of lesion healing may be followed by magnetic resonance (MR) imaging to formulate a prognosis and to adapt the rehabilitation program. We assessed the correlation of outcome with total tendon damage and temporal resolution of MR abnormalities. Images from 34 horses with DDF tendinopathy that had undergone at least two low-field standing MR examinations of the foot (mean 2.5 ± 1.3 times) were reviewed. No horse having a T1-GRE hyperintense lesion over 30 mm in length or over 10% tendon cross-sectional area returned to its previous activity level. Horses with concomitant lesions had worse outcome than horses with DDF tendinopathy only (P = 0.005). In all horses including those with excellent outcome, the lesion persisted, even mildly, in T1-GRE and PD images. Horses with tendon lesion resolution on STIR-FSE and T2-FSE images on recheck examination had a better outcome (P = 0.0004 and P = 0.002, respectively), and all horses that returned to their previous level of performance had complete resolution of signal hyperintensity on the STIR-FSE sequence. Although rehabilitation remains multifactorial, characteristics of DDF tendinopathy and concomitant lesions on first and recheck MR examinations allow refining the prognosis.
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- 2011
6. Contributors
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Rick M. Arthur, Greg Baldwin, Lance H. Bassage, Andrew P. Bathe, Jill Beech, Scott D. Bennett, Philippe H. Benoit, William V. Bernard, Alicia L. Bertone, Jerry B. Black, James T. Blackford, Jeff A. Blea, Jane C. Boswell, Robert P. Boswell, Robert M. Bowker, Julia Brooks, Herbert J. Burns, John P. Caron, G. Kent Carter, Eddy R.J. Cauvin, Mark W. Cheney, Jennifer M. Cohen, Chris Colles, Simon N. Collins, Robin M. Dabareiner, Robert Andrew Dalglish, Elizabeth J. Davidson, Jean-Marie Denoix, Stephen P. Dey, Janet Douglas, Matthew Durham, David R. Ellis, Kristiina Ertola, Franco Ferrero, Lisa Fortier, David D. Frisbie, José M. García-López, Ronald L. Genovese, Howard E. Gill, Dallas O. Goble, Nancy L. Goodman, Barrie D. Grant, Kevin K. Haussler, Dan L. Hawkins, W. Theodore Hill, Jukka Houttu, Robert J. Hunt, Kjerstin M. Jacobs, Joan S. Jorgensen, Chris E. Kawcak, Kevin P. Keane, Kevin G. Keegan, John C. Kimmel, Simon Knapp, Svend E. Kold, John Maas, Benson B. Martin, Scott R. McClure, William H. McCormick, Andrew M. McDiarmid, Sue M. McDonnell, C. Wayne McIlwraith, P.J. McMahon, Rose M. McMurphy, Christopher (Kit) B. Miller, Martha M. Misheff, James B. Mitchell, John S. Mitchell, Richard D. Mitchell, Patrick J. Moloney, William A. Moyer, Graham Munroe, Rachel C. Murray, Alastair Nelson, Frank A. Nickels, Paul M. Nolan, David M. Nunamaker, Timothy R. Ober, Thomas P.S. Oliver, Gene Ovnicek, Joe D. Pagan, Eric J. Parente, Tim D.H. Parkin, Andrew H. Parks, Richard J. Piercy, Robert C. Pilsworth, Christopher C. Pollitt, Joanna Price, Sarah M. Puchalski, Norman W. Rantanen, Virginia B. Reef, Patrick T. Reilly, Dean W. Richardson, Mark C. Rick, Bradley S. Root, Alan J. Ruggles, Allen M. Schoen, Michael C. Schramme, Robert Sigafoos, Roger K.W. Smith, Van E. Snow, Sharon J. Spier, Vivian S. Stacy, James C. Sternberg, Anthony Stirk, Amanda Sutton, Alain P. Théon, Fabio Torre, Stephanie J. Valberg, Robert Joseph Van, John P. Walmsley, Tim Watson, Renate Weller, R. Chris Whitton, Jeffrey A. Williams, Alan Wilson, Paul Wollenman, and James Wood
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- 2011
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7. Prepurchase Examination of the Performance Horse
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Sue J. Dyson and Richard D. Mitchell
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media_common.quotation_subject ,Horse ,Art history ,Art ,media_common - Published
- 2011
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8. Lameness in the Show Hunter and Show Jumper
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Robert P. Boswell., Christopher (Kit) B. Miller, Philippe H. Benoit, Richard D. Mitchell, Timothy R. Ober, and Sue J. Dyson
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medicine.medical_specialty ,Physical medicine and rehabilitation ,business.industry ,Lameness ,Medicine ,Jumper ,business - Published
- 2011
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9. Magnetic resonance imaging findings of desmopathy of the collateral ligaments of the equine distal interphalangeal joint
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Richard D. Mitchell, Kent A. Allen, Natasha M. Werpy, Laurie Tyrrell, Santiago D. Gutierrez-Nibeyro, Nathaniel A. White, and K. E. Sullins
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Male ,medicine.medical_specialty ,Extracorporeal shock wave therapy ,medicine.medical_treatment ,Lameness, Animal ,Rest ,Toe Joint ,Sensitivity and Specificity ,Distal interphalangeal joint ,Diagnosis, Differential ,medicine ,Animals ,Horses ,Retrospective Studies ,Medial collateral ligament ,Rehabilitation ,General Veterinary ,medicine.diagnostic_test ,business.industry ,Enthesopathy ,Reproducibility of Results ,Magnetic resonance imaging ,Collateral Ligaments ,medicine.disease ,Prognosis ,Magnetic Resonance Imaging ,Surgery ,medicine.anatomical_structure ,Treatment Outcome ,Lameness ,Ligament ,Female ,Horse Diseases ,Radiology ,Joint Diseases ,business ,Follow-Up Studies - Abstract
We report the use of a low-field magnetic resonance (MR) imaging system for the detection of desmopathy of the collateral ligament of the distal interphalangeal joint and the long-term outcome. Twenty horses were studied and their medical records and MR images were reviewed retrospectively. Long-term follow-up information was obtained by telephonic questionnaires of owners, trainers, or referring veterinarians. Desmopathy of the medial collateral ligament (80%) and enthesopathy of the affected collateral ligament (80%) were common MR imaging features. Treatment consisted of stall rest followed by a rehabilitation period. Additional treatments included shoeing, extracorporeal shock wave therapy, application of a half limb or foot cast, and medication of the distal interphalangeal joint. Twelve (60%) horses returned to their previous level of exercise and maintained their previous level, whereas eight horses had a poor outcome. Low-field MR imaging in the standing patient can be used to detect collateral ligament desmopathy of the distal interphalangeal joint without a need for general anesthesia.
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- 2009
10. Lameness in the Show Hunter and Show Jumper
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Richard D. Mitchell, Sue J. Dyson, and Robert P. Boswell.
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medicine.medical_specialty ,Physical medicine and rehabilitation ,Lameness ,business.industry ,medicine ,Jumper ,business - Published
- 2003
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