Imperial College London

ProfessorTimothyOrchard

Faculty of MedicineDepartment of Metabolism, Digestion and Reproduction

Professor of Gastroenterology
 
 
 
//

Contact

 

t.orchard

 
 
//

Location

 

GI UnitNorfolk PlaceSt Mary's Campus

//

Summary

 

Publications

Publication Type
Year
to

144 results found

Treibel TA, Mawdsley J, Negus R, Hoare JM, Orchard TR, Thomas HJ, Teare JP, Powell Net al., 2008, Endoscopy for dysphagia in young patients, Annual General Meeting of the British-Society-of-Gastroenterology, Publisher: B M J PUBLISHING GROUP, Pages: A102-A102, ISSN: 0017-5749

Conference paper

Walker D, Orchard T, 2008, Do Extraintestinal Manifestations Predict Disease Course, Severity, and/or Activity in IBD?, INFLAMMATORY BOWEL DISEASES, Vol: 14, Pages: S200-S201, ISSN: 1078-0998

Journal article

Purkayastha S, Tekkis PP, Lanitis S, Athanasiou T, Heriot AG, Darzi AW, Orchard TR, Nicholls RJet al., 2006, A comparison of segmental vs subtotal/total colectomy for colonic Crohn's disease: a meta-analysis., Colorectal Dis, Vol: 8, Pages: 723-724, ISSN: 1462-8910

Purpose: To evaluate differences in short- and long-term outcomes of patients with colonic Crohn's disease (CD) undergoing either subtotal/total colectomy with ileorectal anastomosis (IRA) or segmental colectomy(SC). Method: Comparative studies from 1988 to 2002, of subtotal/total colectomy and IRA vs SC, were used. The study end points included surgical and overall recurrence, time to recurrence, postoperative morbidity and incidence of permanent stoma. Meta-analytical tools were used to evaluate the study outcomes. Results: Six studies, consisting of a total of 488 patients (223-IRA and 265-SC) were included. Meta-analysis suggested no significant difference between IRA and SC in recurrence of CD. Time to recurrence was longer in the IRA group by 4.4 years (95%CI, 3.1-5.8), P < 0.001. There was no difference in postoperative complications (OR = 1.4, 95%CI, 0.16-12.74) or the need for a permanent stoma between the two groups (OR = 2.75, 95%CI, 0.78-9.71). Patients with two or more colonic segments involved were associated with lower re-operation rate in the IRA group, a difference which did not reach statistical significance (P = 0.177). Conclusions: Both procedures were equally effective as treatment options for colonic CD, however, patients in the SC group exhibited recurrence earlier than those in the IRA group. The choice of operation is dependent on the extent of colonic disease, with a trend towards better outcomes with IRA for two or more colonic segments involved.

Journal article

Reese GE, Constantinides VA, Simillis C, Darzi AW, Orchard TR, Fazio VW, Tekkis PPet al., 2006, Diagnostic precision of anti-<i>Saccharomyces cerevisiae</i> antibodies and perinuclear antineutrophil cytoplasmic antibodies in inflammatory bowel disease, AMERICAN JOURNAL OF GASTROENTEROLOGY, Vol: 101, Pages: 2410-2422, ISSN: 0002-9270

Journal article

Orchard T, Probert CS, Keshav S, 2006, Review article: maintenance therapy in patients with ulcerative colitis, ALIMENTARY PHARMACOLOGY & THERAPEUTICS, Vol: 24, Pages: 17-22, ISSN: 0269-2813

Journal article

Hoare JM, MacDonald D, Siddiqui A, Orchard TR, Teare JP, Thomas HJ, Negus Ret al., 2006, Peptic ulcers are being undertreated due to the lack of availability of specialist nursing and equipment out of hours: An audit of 116 consecutive referrals for GI bleeding, Annual Meeting of the British-Society-of-Gastroenterology, Publisher: B M J PUBLISHING GROUP, Pages: A90-A91, ISSN: 0017-5749

Conference paper

Purkayastha S, Tekkis PP, Lanitis S, Athanasiou T, Heriot AG, Orchard TR, Nicholls RJ, Darzi AWet al., 2006, A comparison of segmental versus subtotal/total colectomy for colonic Crohn’s disease: a meta-analysis., Royal Society of Medicine, Section of Coloproctology, Publisher: Wiley, Pages: 82-90, ISSN: 1463-1318

Objective Using meta-analytical techniques the presentstudy evaluated differences in short-term and long-termoutcomes of adult patients with colonic Crohn’s diseasewho underwent either colectomy with ileorectal anastomosis(IRA) or segmental colectomy (SC).Methods Comparative studies published between 1988and 2002, of subtotal ⁄ total colectomy and ileorectalanastomosis vs segmental colectomy, were used. Thestudy end points included were surgical and overallrecurrence, time to recurrence, postoperative morbidityand incidence of permanent stoma. Random and fixedeffectmeta-analytical models were used to evaluate thestudy outcomes. Sensitivity analysis, funnel plot andmeta-regressive techniques were carried out to explainthe heterogeneity and selection bias between the studies.Results Six studies, consisting of a total of 488 patients(223 IRA and 265 SC) were included. Analysis of thedata suggested that there was no significant differencebetween IRA and SC in recurrence of Crohn’s disease.Time to recurrence was longer in the IRA group by4.4 years (95% CI: 3.1–5.8), P < 0.001. There was nodifference between the incidence of postoperative complications(OR ¼ 1.4., 95% CI 0.16–12.74) or the needfor a permanent stoma between the two groups (OR ¼2.75, 95% CI 0.78–9.71). Patients with two or morecolonic segments involved were associated with lower reoperationrate in the IRA group, a difference which didnot reach statistical significance (P ¼ 0.177).Conclusions Both procedures were equally effective astreatment options for colonic Crohn’s disease however,patients in the SC group exhibited recurrence earlier thanthose in the IRA group. The choice of operation isdependent on the extent of colonic disease, with a trendtowards better outcomes with IRA for two or morecolonic segments involved. Since no prospective randomisedstudy has been undertaken, a clear view aboutwhich approach is more suitable for localised colo

Conference paper

Rashid ST, Thursz MR, Razvi NA, Voller R, Orchard T, Rashid ST, Shlebak AAet al., 2005, Venous thromboprophylaxis in UK medical inpatients, JOURNAL OF THE ROYAL SOCIETY OF MEDICINE, Vol: 98, Pages: 507-512, ISSN: 0141-0768

Journal article

Moorthy K, Munz Y, Orchard TR, Gould S, Rockall T, Darzi Aet al., 2004, An innovative method for the assessment of skills in lower gastrointestinal endoscopy, SURGICAL ENDOSCOPY AND OTHER INTERVENTIONAL TECHNIQUES, Vol: 18, Pages: 1613-1619, ISSN: 0930-2794

Journal article

Orchard T, 2003, Extraintestinal complications of inflammatory bowel disease., Curr Gastroenterol Rep, Vol: 5, Pages: 512-517, ISSN: 1522-8037

Recent studies of extraintestinal manifestations (EIMs) of inflammatory bowel disease (IBD) have demonstrated the importance of genetic predisposition in the etiology of musculoskeletal and cutaneous manifestations. In addition, small studies have shown infliximab to be effective in treating troublesome EIMs, particularly in pyoderma gangrenosum. Other trials have examined the safety of cyclooxygenase-2-specific nonsteroidal inflammatory drugs in IBD. Further work has been done on osteoporosis in IBD, and the American Gastroenterological Association has published a technical review and management guidelines for osteoporosis in a range of gastrointestinal disorders. However, despite further publications, debate remains concerning whether IBD patients with osteoporosis have a significant increase in fracture risk, and whether the bone loss is related to the disease or to its treatment.

Journal article

Holden W, Orchard T, Wordsworth P, 2003, Enteropathic arthritis, RHEUMATIC DISEASE CLINICS OF NORTH AMERICA, Vol: 29, Pages: 513-+, ISSN: 0889-857X

Journal article

Armuzzi A, Ahmad T, Ling KL, de Silva A, Cullen S, van Heel D, Orchard TR, Welsh KI, Marshall SE, Jewell DPet al., 2003, Genotype-phenotype analysis of the Crohn's disease susceptibility haplotype on chromosome 5q31, GUT, Vol: 52, Pages: 1133-1139, ISSN: 0017-5749

Journal article

Orchard TR, Ahmad T, Jewell DP, 2003, NOD2/CARD15 mutations in the extraintestinal manifestations (EIMS) of inflammatory bowel disease, Annual meeting of the British-Society-of-Gastroenterology, Publisher: BRITISH MED JOURNAL PUBL GROUP, Pages: A59-A60, ISSN: 0017-5749

Conference paper

Ahmad T, Orchard T, Armuzzi A, Jewell D, Marshall Set al., 2003, NOD2 insertion mutation in a Cretan Crohn's disease population - Reply, GASTROENTEROLOGY, Vol: 124, Pages: 273-274, ISSN: 0016-5085

Journal article

Mitchell SA, Thyssen M, Orchard TR, Jewell DP, Fleming KA, Chapman RWet al., 2002, Cigarette smoking, appendectomy, and tonsillectomy as risk factors for the development of primary sclerosing cholangitis: a case control study, GUT, Vol: 51, Pages: 567-573, ISSN: 0017-5749

Journal article

Orchard TR, Chua CN, Ahmad T, Cheng H, Welsh KI, Jewell DPet al., 2002, Uveitis and erythema nodosum in inflammatory bowel disease: Clinical features and the role of HLA genes, GASTROENTEROLOGY, Vol: 123, Pages: 714-718, ISSN: 0016-5085

Journal article

Ahmad T, Marshall SE, Mulcahy-Hawes K, Orchard T, Crawshaw J, Armuzzi A, Neville M, van Heel D, Barnardo M, Welsh KI, Jewell DP, Bunce Met al., 2002, High resolution MIC genotyping: Design and application to the investigation of inflammatory bowel disease susceptibility, TISSUE ANTIGENS, Vol: 60, Pages: 164-179, ISSN: 0001-2815

Journal article

Fraser AG, Orchard TR, Robinson EM, Jewell DPet al., 2002, Long-term risk of malignancy after treatment of inflammatory bowel disease with azathioprine, ALIMENTARY PHARMACOLOGY & THERAPEUTICS, Vol: 16, Pages: 1225-1232, ISSN: 0269-2813

Journal article

Fraser AG, Orchard TR, Jewell DP, 2002, The efficacy of azathioprine for the treatment of inflammatory bowel disease: a 30 year review, GUT, Vol: 50, Pages: 485-489, ISSN: 0017-5749

Journal article

Ahmad T, Armuzzi A, Bunce M, Mulcahy-Hawes K, Marshall S, Orchard T, Crawshaw J, Large O, de Silva A, Cook J, Barnardo M, Cullen S, Welsh K, Jewell Det al., 2002, The molecular classification of the clinical manifestations of Crohn's disease, GUT, Vol: 50, Pages: A15-A15, ISSN: 0017-5749

Journal article

Ahmad T, Armuzzi A, Bunce M, Mulcahy-Hawes K, Marshall SE, Orchard TR, Crawshaw J, Large O, De Silva A, Cook JT, Barnardo M, Cullen S, Welsh KI, Jewell DPet al., 2002, The molecular classification of the clinical manifestations of Crohn's disease, GASTROENTEROLOGY, Vol: 122, Pages: 854-866, ISSN: 0016-5085

Journal article

Orchard TR, Dhar A, Simmons JD, Vaughan R, Welsh KI, Jewell DPet al., 2001, MHC class I chain-like gene A (MICA) and its associations with inflammatory bowel disease and peripheral arthropathy, CLINICAL AND EXPERIMENTAL IMMUNOLOGY, Vol: 126, Pages: 437-440, ISSN: 0009-9104

Journal article

Smale S, Natt RS, Orchard TR, Russell AS, Bjarnason Iet al., 2001, Inflammatory bowel disease and spondylarthropathy., Arthritis Rheum, Vol: 44, Pages: 2728-2736, ISSN: 0004-3591

Journal article

Orchard TR, Ahmad T, Welsh KI, Jewell DPet al., 2001, Extraintestinal manifestations of inflammatory bowel disease (IBD) and polymorphisms in the TNFα gene:: Further evidence for phenotype determining genes in the MHC region on chromosome 6, GASTROENTEROLOGY, Vol: 120, Pages: A456-A456, ISSN: 0016-5085

Journal article

Ahmad T, Bunce M, Crawshaw J, Mulcahy-Hawes K, Large O, Barnardo M, Cook J, Orchard T, McGovern D, Jewell Det al., 2001, Is there a role for MICA and MICB in determining susceptibility and phenotype in inflammatory bowel disease?, GASTROENTEROLOGY, Vol: 120, Pages: A458-A459, ISSN: 0016-5085

Journal article

Orchard TR, Ahmad T, Welsh KI, Jewell DPet al., 2001, TNFα gene polymorphisms and extraintestinal manifestations of IBD:: Further evidence for phenotype determining genes in the MHC region, GUT, Vol: 48, Pages: A83-A83, ISSN: 0017-5749

Journal article

Ahmad T, Bunce M, Crawshaw J, Mulcahy-Hawes K, Large O, Barnardo M, Cook J, Orchard T, Welsh K, Jewell DPet al., 2001, Is there a role for MICA and MICB in determining susceptibility and phenotype in ulcerative colitis?, GUT, Vol: 48, Pages: A84-A84, ISSN: 0017-5749

Journal article

Watanabe K, Simmons JD, Orchard TR, Fraser A, Kinouchi Y, Marshall SE, Welsh KI, Jewell DPet al., 2000, Allelic variants, of thiopurine methyl transferase are associated with Azathioprine, induced leukopaenia., GASTROENTEROLOGY, Vol: 118, Pages: A338-A338, ISSN: 0016-5085

Journal article

Orchard TR, Chua C, Cheng H, Jewell DPet al., 2000, Clinical features of erythema nodosum (EN) and uveitis associated with inflammatory bowel disease (IBD)., GASTROENTEROLOGY, Vol: 118, Pages: A120-A120, ISSN: 0016-5085

Journal article

Fraser AG, Orchard TR, Jewell DP, 2000, Relapse rates on and after stopping azathioprine treatment for IBD, GUT, Vol: 46, Pages: A12-A12, ISSN: 0017-5749

Journal article

This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.

Request URL: http://wlsprd.imperial.ac.uk:80/respub/WEB-INF/jsp/search-html.jsp Request URI: /respub/WEB-INF/jsp/search-html.jsp Query String: id=00420913&limit=30&person=true&page=4&respub-action=search.html