Professor Alok Tiwari

Visiting Professor of Vascular Surgery / Co-Course Lead in Advancing Diabetes Care

Professor Alok Tiwari has been a consultant vascular surgeon at University Hospitals Birmingham since 2011 and is Visiting Professor of Vascular Surgery at Birmingham City University.

He qualified from Charing Cross and Westminster Medical school in 1996, completed basic surgical training in Essex and then embarked on a Master of Surgery (MS) at the Royal Free Hospital. He was awarded his MS for his research on tissue engineering for vascular disease.

He then trained extensively in UK, Australia and Singapore in both open and endovascular surgery. His clinical interest is in endovascular surgery of the lower limb and management of the diabetic foot.

He is the training programme director for Vascular Surgery in the West Midlands and member of the specialist advisory committee on Vascular Surgery. From 2015-2020, he was Lead for GMC accreditation of Educational Supervisor, University Hospitals Birmingham. He has been an honorary senior clinical lecturer at University of Birmingham since 2013.

Professor Tiwari is keen on teaching of all groups of medical staff. He has published more than 100 articles and book chapters on most aspects of vascular surgery.

Qualifications

Teaching

Research

Publications

Original articles

Madani D, Saeed M, Tiwari A, David M. The role of remnant bone microbiological cultures in managing diabetic foot osteomyelitis. Br J Diabetes 2021; 21: 59-61.
Lowry D et al, Tiwari A. An Extension of the Bollinger Scoring System to Analyze the Distribution of Macrovascular Disease of the Lower Limb in Diabetes. Eur J Vasc Endovasc Surg 2021; 61: 280-86.
Premratne S, Hopkins J, Sang KT, Duddy M, Rogovenau R, Kay M, Nicholl P, Tiwari A. Abdominal aortic aneurysm repair in renal and liver transplant recipients. Vasc Endovasc Surg 2020; 54: 51-7.
Tang TY, Rathnaweera H, Choke E, Tiwari A, Chong TT. Institution of a Double-Dosing Protocol Using Cyanoacrylate Glue for Larger Diameter Refluxing Superficial Truncal Veins. Dermatol Surg 2019; 45: 1426-9.
Cragg J, Lowry D, Hopkins J, Parker D, Kay M, Duddy M, Tiwari A. Safety and outcomes of ipsilateral antegrade angioplasty for femoropopliteal disease. Vasc Endovasc Surg 2018; 52: 93-7.
Tiwari A, Wilson I, Debrito M, David M, Saeed M. A small case series of toe sparing surgery: excision of the first metatarsophalangeal joint in diabetic patients to facilitate wound healing. Br J Diabetes 2018;18:106-109.
Vatish J, Iqbal N, Rajalingam V, Tiwari A. The outcome of anticoagulation on endovenous laser therapy for superficial venous incompetence. Vasc Endovasc Surg 2018; 52: 245-8.
Barker T, Benson R, Evison F, Tiwari A. Risk of venous thromboembolism following surgical treatment of superficial venous incompetence. VASA 2017; 46:484-489
Chisman R, Lowry D, Saeed M, Tiwari A, David M. Prescribing antibiotics in diabetic foot infection: what is the role of initial microscopy and culture of tissue samples? Int Wound J 2017; 14:685-690
Al Shakarchi J, Lowry D, Khawaja A, Nath J, Inston N, Tiwari A. Duplex ultrasound surveillance following carotid artery endarterectomy. J Vasc Surg 2016; 63: 1647-50.
Lowry D, Singh J, Mytton J, Tiwari A. Sex related outcome inequalities in endovascular aneurysm repair. Eur J Vasc Endovasc Surg 2016; 52: 518-25.
Shoab S, Lowry D, Tiwari A. Effect of treated length in endovenous laser ablation of great saphenous vein (GSV) on early outcomes. J Vasc Surg Venous Lymphat Disord 2016; 4: 416-21.
Saha S, Tiwari A, Hunns C, Refson J, Abidia A. Efficacy of topical local anaesthesia to reduce perioperative pain for endovenous laser ablation of varicose veins: a double-blind randomized controlled trial. Ther Adv Cardiovasc Dis. 2016; 10: 251-5.
Mathur K, Ayyappan MK, Hodson J, Hopkins J, Duddy M, Tiwari A, Vohra R. Stenting as a bail-out option after failed percutaneous transluminal angioplasty in infrainguinal vein bypass grafts. Vascular 2016; 24: 383-9.
Mathur K, Ayyappan MK, Hodson J, Hopkins J, Tiwari A, Duddy M, Vohra R. Factors Affecting Medium-Term Outcomes After Crural Angioplasty in Critically Ischemic Legs. Vasc Endovasc Surg 2015; 49: 63-8.
Ritter JC, Green DW, Slim H, Tiwari A, Brown J, Rashid H. The role of cerebral oximetry in combination with awake testing in patients undergoing carotid endarterectomy under local anaesthesia. Eur J Vasc Endovasc Surg 2011; 41: 599-605.
Tiwari A, Slim H, Edmonds M, Ritter JC, Rashid H. Outcome of lower limb distal bypass in Afro-Caribbean populations. Vasc Endovasc Surg 2011; 45: 514-8.
Slim H, Ali A, Tiwari A, Ritter C, Zayed H, Rashid H. Distal versus ultra-distal bypass grafts; amputation-free survival and patency rates in patients with critical leg ischaemia. Eur J Vasc Endovasc Surg 2011; 42: 83-8.
Slim H, Tiwari A, Ritter C, Rashid H. Outcome of infra-inguinal bypass grafts using vein conduit with less than 3mm diameter in critical leg ischaemia. J Vasc Surg 2011, 53: 421-5.
Tiwari A et al. Use of inferior vena cava filters in a tertiary referral centre in Australia. ANZ J Surg 2010; 80: 364-7.
Swinnen J, Vicaretti M, Chao A, Tiwari A, Crozier J, Fletcher J. Vertical or transverse incisions for access to the femoral artery: a randomised control study. Ann Vasc Surg 2010; 24: 336-41.
Abeysekara A, Siriwardana HP, Prabaharan B, Tiwari A, Madipolagedara N, Jacob S. Common facial vein: an alternative patch material in carotid angioplasty. ANZ J Surg 2008, 78(3): 185-8.
Tiwari A, Yeo TK, Riris S, Moghal M, Williams S, Meleagros L. The distribution and pathological staging of colorectal cancers in ethnic groups. Anticancer Res 2007; 27(4): 2957-9.
Tiwari A, Myint F, Hamilton G. Recognition and management of abdominal compartment syndrome in the United Kingdom. Intensive Care Med 2006; 32: 906-9.
Tiwari A, Myint F, Hamilton G. Management of lower limb lymphoedema in the United Kingdom. Eur J Vasc Endovasc Surg 2006; 31: 311-5.
Tiwari A, Kumar Y, Walkay G, Ross S, Peters JL. Can surgical registrars identify an acutely inflamed appendix? A prospective audit. J Eval Clin Pract 2005; 11(5): 507-8.
Tiwari A, DiSalvo C, Walesby R, Hamilton G, Seifalian AM. Mediastinal fat: a source of cells for tissue engineering of coronary artery bypass grafts. Microvasc Res 2003; 65: 61-4.
Cheng KS, Tiwari A, Morris R, Hamilton G, Seifalian AM. The influence of peripheral vascular disease on the carotid and femoral viscoelastic properties and intima-media thickness in subjects with abdominal aortic aneurysm. J Vasc Surg 2003; 37(2): 403-9.
Tiwari A, Kidane A, Salacinski HJ, Punshon G, Hamilton G, Seifalian AM. Improving endothelial cell retention for single stage seeding of prosthetic grafts: use of polymer sequences of arginine-glycine-aspartate (RGD). Eur J Vasc Endovasc Surg 2003; 25(4): 325-9.
Tiwari A, Kidane A, Punshon G, Hamilton G, Seifalian AM. Extraction of cells for single stage seeding of vascular bypass grafts. Biotechnol. Appl. Biochem. 2003; 38: 35-41.
Tiwari A, Punshon G, Kidane A, Hamilton G, Seifalian AM. Magnetic beads (DynabeadTM) toxicity to endothelial cells at high bead concentration: Implication for tissue engineering of vascular prosthesis. Cell Biol Toxicol 2003; 19(5): 265-72.
Cheng KS, Tiwari A, Boutin A, Denton CP, Black CM, Morris R, Hamilton G, Seifalian AM. Carotid and femoral arterial wall mechanics in scleroderma. Rheumatology 2003; 42(11): 1299-305.
Cheng K, Tiwari A, Baker CR, Morris R, Hamilton G, Seifalian AM. Impaired carotid and femoral viscoelastic properties and elevated intima-media thickness in peripheral vascular disease. Atherosclerosis 2002; 164(1): 113-20.
Tiwari A, Douek M, Ackroyd JS. Rationing of surgery for varicose veins based on the presence and absence of cosmetic symptoms. J Eval Clin Pract 2002; 8(4): 425-7.
Tiwari A, Salacinski HJ, Punshon G, Hamilton G, Seifalian AM. Development of a hybrid cardiovascular graft using a tissue engineering approach. FASEB J 2002; 16(8): 791-6.
Haq AI, Tiwari A, Goldman MA, Mohanna P-N. A simple technique of irrigating the abdomen and pelvis through an appendicectomy wound. Ann Roy Coll Surg Eng 2002; 84(3): 211.
Tiwari A, Abeysinghe N, Hall A, Perera P, Ackroyd JS. Should doctors wear white coats? The patients perspective. J Eval Clin Pract 2001; 7(3): 343-5.
Cheng KS, Tiwari A, Boutin A, Morris R, Denton CP, Black C, Seifalian AM, Hamilton G. Differentiation of primary and secondary Raynaud's disease by the carotid arterial stiffness. Eur J Vasc and Endovasc Surg 2003; 25(4): 336-41.
Seifalian AM, Salacinski HJ, Tiwari A, Edwards A, Bowald S, Hamilton G. In vivo biostability of a poly(carbonate-urea)urethane graft. Biomaterials 2003; 24(14): 2549-57.

Review articles

Chan S, Yiu Chan YC, Walsh SR, Chong TT, Choke ET, Tiwari A, Tang TY. Endovenous cyanoacrylate ablation for chronic venous insufficiency and varicose veins among Asians Ann Acad Med Singap 2021 (in press)
Bashar K, Shalan, A, Ali SS, Tang TY, Tiwari A. A systematic review of endovascular versus medical treatment of venous compression syndrome of the iliac vein. VASA 2020 (in press)
D’Cruz R, Syn N, Leong S, Vijayan V, Sidhu HRS, Tiwari A, Tang T. Endovascular treatment of cephalic arch stenosis in brachiocephalic arterio-venous fistulas: A systematic review & meta-analysis. J Vasc Access 2019; 20: 345-55.
Lowry D, Saeed M, Narendran P, Tiwari A. A review of distribution of atherosclerosis in the lower limb arteries of patients with diabetes mellitus and peripheral vascular disease. Vasc and Endovasc Surg 2018; 52: 535-42
Lowry D, Saeed M, Narendran P, Tiwari A. The difference between the healing and the non-healing diabetic foot ulcer: A review of the role of the microcirculation J Diabetes Sci Technol 2017; 11:914-923.
Tiwari A, Meleagros L. Colonoscopic perforation. Br J Hosp Med 2007; 68(8): 429-35.
Tiwari A, Myint F, Hamilton G. Recognition and management of abdominal compartment syndrome in the United Kingdom. Br J Intens Care 2007; 17:98-100.
Kidane AG, Salacinski H, Tiwari A, Bruckdorfer KR, Seifalian AM. Anticoagulant- platelet agents: their clinical and device application(s) together with usages to engineer surfaces. Biomacromolecules 2004; 5(3): 798-813.
Tiwari A, Cheng KS, Button M, Myint F, Hamilton G. Differential diagnosis and treatment of lower limb lymphoedema. Phlebology Digest 2004; 17(1): 9-11.
Tiwari A, Myint F, Hamilton G. Acute limb and abdominal compartment syndromes. Postgraduate Surgery (Caribbean) 2003; 19(5): 182-4.
Tiwari A, Cheng KS, Button M, Myint F, Hamilton G. Differential diagnosis, investigation and current treatment of lower limb lymphedema. Arch Surg 2003; 138: 152-61.
Tiwari A, Cheng KS, Salacinski HJ, Hamilton G, Seifalian AM. Improving the patency of vascular bypass grafts: the role of suture materials and surgical techniques on reducing anastomotic compliance mismatch. Eur J Vasc Endovasc Surg 2003; 25(4): 287-95.
Tiwari A, Haq AI, Myint F, Hamilton G. Acute compartment syndromes. Br J Surg 2002; 89(4): 397-412.
Seifalian AM, Tiwari A, Hamilton G, Salacinski HJ. Improving the clinical patency of prosthetic vascular and coronary bypass grafts: the roles of seeding and tissue engineering. Artif Organs 2002; 26(4): 307-20.
Tiwari A, Salacinski HJ, Seifalian AM, Hamilton G. New prostheses for use in bypass grafts with special emphasis on polyurethanes. Cardiovasc Surg 2002; 10(3): 191-7.
Tiwari A, Salacinski H, Hamilton G, Seifalian AM. Tissue engineering of vascular bypass grafts: role of endothelial cell extraction. Eur J Vasc Endovasc Surg 2001; 21(3): 193-201.
Salacinski HJ, Tiwari A, Hamilton G, Seifalian AM. Cellular engineering of vascular bypass grafts: role of chemical coatings for enhancing endothelial cell attachment. Med Biol Eng Comput 2001; 39(6): 609-18.

Editorial

Tiwari A, Walsh SR, Davies AH, Tang TY. A need for evidence to guide treatment recommendation for women with chronic venous disease during childbearing years. Phlebology 2020; 35: 548-9.
Keohane C, Walsh SR, Tiwari A, Davies AH, Tang TY. Cyanoacrylate glue using the VenaSeal™ Closure System for varicose veins may not be the panacea endovenous ablation device-more complications than you think. Vascular Diseases and Therapeutics 2020 doi: 10.15761/VDT.1000184.
Tang TY, Choke EC, Walsh SR, Tiwari A, Chong TT. What Now for the Endovascular Community After the Paclitaxel Mortality Meta-Analysis: Can Sirolimus Replace Paclitaxel in the Peripheral Vasculature? J Endovasc Ther 2020; 27: 153-6.
Tiwari A, Chong TT, Walsh SR, Davies AH, Tang TY. Reporting outcomes of new and old endovenous technologies using a standardized dataset - Now is the time for change. Phlebology 2019; 34: 5-7.
Tang TY, Walsh SR, Chong TT, Choke ETC, Tiwari A. Results of the EVRA trial will be a game-changer for the management of every venous ulcer. Phlebology 2018; 33: 660-62.
Tiwari A, Moghal M, Meleagros L. Abdominal complications of crack/cocaine abuse. J Roy Soc Med 2006; 99: 51-2.

Case reports

Tiwari A, Tang TY. The VenaSeal abnormal red skin reaction – Looks like but is not phlebitis! Eur J Vasc Endovasc Surg 2018; 55: 841.
Abbas A, Tiwari A, Kudrow N, Vithurgiri A, Littleton E. Brachiocephalic arterial occlusive limb-shaking transient ischaemic attacks. Clinical Medicine 2018 (in press)
MacDiarmid M, Nepogodiev D, Tiwari A, Duddy M, Carey M, Jobanputra P. Eosinophilic angiitis presenting with a true, fusiform, temporal artery aneurysm. Clinical Case Reports 2017; 5:769-73.
Ali O, Nicholl P, Carruthers D, Geoghegan J, Tiwari A. Multiple Aneurysms and a Transplanted Kidney in Behcet Disease. Vasc Endovasc Surg 2017 51:108-10.
Iqbal N, Tiwari A. Lipoma in the Brachiocephalic vein. Eur J Vasc Endovasc Surg 2017 53: 694.
Littleton E, Glover N, Tiwari A. Recurrent amaurosis fugax and hemichorea or limb-shaking TIA. Pract Neuro 2015 15: 218-20.
Crabtree S, Lowry D, Tiwari A, Gittoes N. Difficult access in the anaesthetic room leads to a difficult diagnosis. BMJ 2015; 8;351:h3430.
Lowry D; Kay M; Tiwari A. Common femoral vein canal lipoma causing chronic unilateral lower limb swelling". BMJ Case report 2014: 28; pii: bcr2013201968. doi: 10.1136/bcr-2013-201968.
Hollingworth A, Duddy M, Tiwari A. A "blush sign": radiological harbinger of delayed pseudoaneurysm formation after vein graft angioplasty. Vasc Endovasc Surg 2013; 47: 656-9.
Poon H, Duddy M, Tiwari A, Hopkins J. Modification of a bifurcated Stent graft for aorto-uni-iliac endovascular aneurysm repair in a renal transplant patient. Vasc Endovasc Surg 2012; 46: 405-9.
Roy S, Vohra R, Duddy M, Tiwari A. Lower limb ischaemic symptoms in the young patient: Popliteal Entrapment Syndrome. J Army Med Corps 2012; 158: 326-8.
Dick J, Tiwari A, Menon J, Hamilton G. Abdominal aortic aneurysm secondary to infection with Pseudomonas Aeruginosa: A rare cause of mycotic aneurysm. Ann Vasc Surg 2010; 24: 692.
Girish G, Tiwari A, Hamilton G. A simple technique for in-situ renal artery perfusion during abdominal aortic aneurysm repair. Ann R Coll Surg Eng 2009, 91: 523.
Tiwari A, Harrington T, Vicaretti M. Endovascular treatment of a ‘fishy’ ulcer caused by a traumatic arteriovenous fistula. Vasc Endovasc Surg 2008; 42: 289-92.
Varoce RL, Jayamanne D, Tiwari A, Swinnen J. A Novel Hybrid Device for Avoiding Redo Surgery in Synchronous Iliac and Femoral Peri-anastomotic Pseudo-aneurysms. Vasc Endovasc Surg 2008;
Tiwari A, Macmull S, Fox S, Jacob S. Left sided abdominal pain in a patient with situs inversus. Clin Anat 2006; 19(2): 154-5.
Reynard J, Singh A, Tiwari A, Peters JL. Delayed presentation of superior mesenteric artery rupture following blunt trauma. Injury 2004; 35: 1306-7.
Nguyen Q, Reynard J, Tiwari A, Peters JL. Quiz: Surgery 2004, 22(1): 24f.
Tiwari A, McFarland J, Peters JL. A simple technique for securing surgical drains. Injury extra 2004; 35: 91-3. doi: 10.1016/j.injury./ 2004. 07.025.
Tiwari A, Nairn DS, Ackroyd JS. An unusual case of ischaemia of forearm and hand. EJVES extra 2001, 1: 71-2. doi: 10.1053/ejvx 2001.0042.
El-Karef E, Tiwari A, Aldam C. Necrotiising Fasciitis: A rare complication of total hip replacement. J Arthroplasty 2000; 15(2): 238-40.

Letters

Tiwari A, Tang TY. Letter to the editor. Re: Multidisciplinary Approach to Oncological Resections with Vascular Surgeons Improves Patient Outcomes. Eur J Vasc Endovasc Surg 2020; 60(2)
Tang TY; Rathnaweera HP; Choke E; Tiwari A; Chong TT. Institution of a Double-Dosing Protocol Using Cyanoacrylate Glue for the Larger Diameter Refluxing Superficial Truncal Vein. Dermatol Surg 2019; 45(11):1426-29
Iqbal N, Martin-Clavijo A, Tiwari A. Endovenous treatment of varicose veins in patients with pyoderma gangrenosum. Dermatol Surg 2019; 45: 493-5.
Tiwari A, Lester W, Tang TY. Varicose Veins and Deep Venous Thrombosis. JAMA 2018 Aug 7;320(5):509-510. doi: 10.1001/jama.2018.7319.
Tiwari A, Chong TT, Tang TY. RE: "Catheter Foam Sclerotherapy (CFS) of the Great Saphenous Vein, with Perisaphenous Tumescence Infiltration and Saphenous Irrigation" - Is modified CFS a step back in the evolution of endovenous ablation for varicose veins? Eur J Vasc Endovasc Surg 2018; 55: 290-1.
Tiwari A, Chong TT, Wang J, Choke E, Tang TY. Regarding "Double prepuncture as a valuable adjunctive technique for complex endovenous ablation". J Vasc Surg Venous Lymphat Disord 2018; 6: 420.
Tiwari A, Vijayan V, Sidhu HRS, Tang TY. Regarding "The effect of wavelength on endothermal heat-induced thrombosis incidence after endovenous laser ablation". J Vasc Surg Venous Lymphat Disord 2018; 6: 423-4.
Adams KJ, Tiwari A, Refson J, Abidia A. Improving access to expedited carotid endarterectomy. Ann R Coll Surg Engl 2010; 92:88.
Tiwari A, Hussain M, Coker JB, Jacob S, Bettany GE. Endoscopic retrograde cholangiopancreatography (ERCP) in the diagnosis of unexplained hyperbilrubinaemia. Hosp Med 2005; 66(1): 51.
Tiwari A, Ackroyd JS. Clothes carry infection: what do doctors think? Ann R Coll Surg Engl (Suppl) 2004; 86(1): 32.
Tiwari A, Abeysekara AMS, Coker JB, Jacob SA. Current treatment options for treating primary hyperhidrosis. Eur J Vasc Endovasc Surg 2004; 28(4): 453.
Tiwari A, Seifalian AM, Hamilton G. Tissue engineering in surgery. Surgeon 2004; 5: 302.
Tiwari A, Myint F, Peters JL, Hamilton G. The abdominal compartment syndrome following aortic surgery. Eur J Vasc Endovasc Surg 2003, 26(1): 110.
Tiwari A, Peters JL. Laparoscopic adhesiolysis in patients with chronic abdominal pain. Lancet 2003; 361: 2243.
Tiwari A, Hamilton G, Seifalian AM. Tissue engineering therapy for cardiovascular diseases. Circ Res 2003, 25;93(2):e1.
Seifalian AM, Tiwari A, Rashid ST, Salacinski HJ, Hamilton G. Letters to the editor. Artif Organs 2002; 26(2): 209-10.
Tiwari A, Jenkins M, Amen A, Cheng KS, Hamilton G. Regarding Abdominal compartment syndrome after mesenteric revascularization. J Vasc Surg 2002; 35(4): 831.
Tiwari A, Seifalian AM, Hamilton G, Lowdell MW, O’Neill E. Regarding Isolation of endothelial cells and their progenitor cells from human peripheral blood. J Vasc Surg 2002; 35(4): 827.
Salacinski HJ, Tiwari A, Hamilton G, Seifalian AM. Performance of a polyurethane vascular prosthesis carrying a dipyridamole (Persantin) coating on its lumenal surface. J Biomed. Mater. Res. 2002; 61(2): 337-8.
Lane T, Salman M, Tiwari A, Myint F. Right acute hemiscrotum caused by insertion of an inflamed appendix. BJU Int 2002; 90(7):765
Tiwari A, Myint F, Hamilton G. Compartment syndrome. Eur J Vasc Endovasc Surg 2002, 24(5): 469.
Ghasseimi A, Salman M, Tiwari A. Compartment syndrome of the forearm following brachial artery puncture and subsequent anticoagulation. J Interv Cardiol 2002; 15(5): 435.
Tiwari A, Nairn DS, Ackroyd JS. Ischemia of the forearm and hand. J. Trauma 2001; 51(3): 623.

Book chapters

Tiwari A, Hamilton G, Myint F. Management of lower limb lymphoedema. In Pathways of Care in Vascular Surgery Eds. Beard J and Murray S TFM publishing Ltd. PP 71-6.
Tiwari A, Hamilton G. Lymphedema: clinical features and investigation. In Venous and lymphatic disease. Eds. Labropoulos N and Stansby G. 511-26.
Tiwari A, Hamilton G. Lymphedema: the role of conservative, medical and surgical treatments. In Venous and lymphatic disease. Eds. Labropoulos N and Stansby G. 527-36.

Published Abstracts

Tiwari A, Yeo TK, Riris S, Moghal M, Williams S, Wijesundera N, Mehrotra R, Syed A, Navaratnam, R Meleagros L. The distribution and pathological staging of colorectal cancer in a multiethnic population in England. Br J Surg 2006, 93(S1): 29, doi: 10.1002/bjs.5436.
Tiwari A, Louth S, Myint F, Hamilton G. Recognition and treatment of abdominal compartment syndrome(ACS): a questionnaire study of intensive care units in the United Kingdom. Br J Surg 2005; 92(S1): 40.
Seifalian AM, Tiwari A, Punshon G, Salacinski H, Kidane A, Hamilton G. Dynabead toxicity to endothelial cells at high bead concentration: Implication for single stage seeding of vascular bypass grafts. FASEB J 2003; 17 (4): A146.
Tiwari A, Salacinski H, Punshon G, Cheng KS, Hamilton G, Seifalian AM. Improving endothelial cell retention in seeding with RGD/Heparin bonded graft under physiological shear stress. Br J Surg 2002; 89: 651.
Salacinski HJ, Tiwari A, Carson RJ, Edwards A, Bowald S, Seifalian AM, Hamilton G. In vivo biocompatibility and biostability of a novel compliant microporous poly(carbonate-urea) urethane vascular graft. Cardiovasc Pathol 2002; 11: 24.
Punshon G, Tiwari A, Salacinski H, Seifalian AM, Baker DM, Myint F, Hamilton G. Is peritoneal lavage a suitable source of mesothelial cells for seeding of prosthetic graft? Cardiovasc Pathol 2002; 11: 54.
Salacinski HJ, Tiwari A, Punshon G, Carson RJ, Edwards A, Seifalian AM, Hamilton G. MyoLink A novel poly(carbonate-urea)urethane vascular graft: a comprehensive in vitro degradation study. Cardiovasc Pathol 2002; 11: 57.
Tiwari A, Salacinski H, Punshon G, Cheng KS, Hamilton G, Seifalian AM. Improving endothelial cell retention in seeding with RGD/Heparin bonded graft under physiological shear stress. Cardiovasc Pathol 2002; 11: 61.
Tiwari A, Salacinski H, Punshon G, Cheng KS, Hamilton G, Seifalian AM. Evaluating mediastinal fat as a source for endothelial cell extraction for seeding in coronary artery bypass graft. Cardiovasc Pathol 2002; 11: 61.
Cheng KS, Tiwari A, Morris R, Hamilton G, Seifalian AM. The influence of peripheral vascular disease on the carotid and femoral viscoelastic properties and intima-media thickness in subjects with abdominal aortic aneurysm. Br J Surg 2002; 89, Suppl. 1: 56.
Salacinski HJ, Seifalian AM, Tiwari A, Goldner S, Punshon G, Carson R, Edwards A, Hamilton G. Usage of an unique artificial knee joint to determine the mechanical stability of a poly(carbonate-urea)urethane ‘MyoLink’ in knee joint movements as experienced in normal and work related situations. FASEB J 2001; 15(5): A1129.
Tiwari A, Green D, Krijsman B, Tinkler K, Boutin A, Myint F, Hamilton G. The value of one stop venous duplex scanning in the outpatient assessment of chronic swelling. Phlebology 2001; 16(1): 45-6.
Tiwari A, Douek M, Khot UP, Bezyade B, Ackroyd JS. The prevalence and importance of cosmetic symptoms in patients undergoing varicose vein surgery. Phlebology 2000; 15(2): 90.

Oral presentations

Mitchell L, Robbie J, Tomkins D, Lucas J, Murray A, Nicholl P, Tiwari A, Kay M, Sam R. Redeplyment of podiatarists into the vascular hot clinic during Covid-19- a concept for service development. Vascular Society 2020.
Mabood F, Premaratne S, Edwards A, Nicholl P, Kay M, Tiwari A. Vascular Trauma Patterns at a Level 1 Trauma Centre in the United Kingdom. Association of surgeons of Great Britain and Ireland (ASGBI) UK 2019.
Lowry D, Tiwari A. Changes in microcirculation following percutaneous angioplasty in patients with diabetic foot ulcers. British society of Endovascular Therapy (BSET), 2018.
Tiwari A, Chen Min Qi, Vijayan V, Sidhu HRS. Outcome of endovascular first approach in diabetic asian patients with lower limb ischaemia. Diabetic Foot Study Group, Berlin 2018.
Iqbal N, Vatish J, Tiwari A. Treatment of varicose veins in patients on oral anticoagulation. European Venous Forum, Portugal 2017.
Cragg J, Lowry D, Hopkins J, Parker D, Kay M, Duddy M, Tiwari A. Safety and Success with Antegrade Angioplasty. Vascular Society, UK, 2016
Shoab S, Lowry D, Tiwari A. Effect of vein length treated with EVLT on need for adjunctive treatment, Vascular Society, UK, 2015.
Barker T, Evison F, Ray D, Tiwari A. Incidence of deep venous thrombosis (DVTs) after differing varicose vein procedures. Balkan Venous Forum 2014.
Tiwari A. Bilateral antegrade angioplasty. 20th Annual conference of Vascular Society of India, 2014
Singh J, Begaj I, Ray D, Tiwari A. Mortality following elective endovascular aneurysm repair is independent of gender: a national population bases study. British society of Endovascular Therapy (BSET), Stratford, June 2013.
Tiwari A. Fenestrated EVAR using the Anaconda device. 20th Annual conference of Vascular Society of India, Madurai 2013.
Poon H, Kahloon F, Hopkins J, Vohra R, Simms M, Edwards A, Duddy M, Tiwari A. Outcome of bilateral antegrade angioplasty. British society of Endovascular Therapy (BSET), Stratford, June 2012.
Chong D, Tam M, Crawford M, Wilson P, Morrow D, Tiwari A. Suitability of EVAR for symptomatic abdominal aortic aneurysms. British society of Endovascular Therapy (BSET), Stratford, June 2012.
Ayyappan MK, Hopkins J, Duddy M, Tiwari A, Vohra R. Salvage of infra-inguinal vein bypass grafts with stenting. 19th Annual Conference of Vascular society of India, Jaipur, India, September 2012
Ayyappan MK, Hopkins J, Tiwari A, Duddy M, Vohra R. Factors affecting limb salvage, amputation free survival and long-term outcomes after crural angioplasty. 19th Annual Conference of Vascular society of India, India, September 2012
Saha S, Tiwari A, Hunns C, Refosn J, Abidia A. Efficacy of topical local anaesthesia to reduce peri-operative pain for endovenous laser therapy of varicose veins: a double-blind randomised controlled trial. ASGBI 2012
Calderbank P..... Tiwari A. Accuracy of deployment of the Gore Excluder stent graft for endovascular abdominal aortic aneurysm repair (EVAR): West midlands surgical society 2011.
Slim H, Tiwari A, Ali A, Ritter JC, Edmonds M, Zayed H, Rashid H. Distal bypass grafts in patients with critical limb ischaemia with poor pedal arch. Vascular Society, Brighton 2010.
Slim H, Anwar A, Tiwari A, Ritter C, Edmonds M, Zayed H, Rashid H. Distal versus ultra-distal bypass grafts; amputation free survival and patency Rates in patients with critical leg ischaemia. ESVS 2010 Amsterdam.
Ritter JC, Green D, Slim H, Ali A, Brown J, Tiwari A, Zayed H, Rashid H. The role of cerebral oximetry in combination with awake testing in patients undergoing carotid endarterectomy under local anaesthesia. ESVS 2010 Amsterdam
Tiwari A, Slim H, Ritter C, Rashid H. Lower limb distal revascularisation in ethnic minorities in U.K. Diabetic foot Study Group meeting 2010, Sweden.
Ritter C, Slim H, Tiwari A, Rashid H. Is distal bypass justified in patients with renal failure? Association International Vascular Surgeons (AIVS), 2010 Austria.
Tiwari A et al. Use of IVC filters in a tertiary referral centre. Vascular 2007. Melbourne.
Tiwari A, Chan H, Varcoe R, Allen R, Swinnen J. Nitinol stents in A-V fistula. Westmead Experience. Vascular 2007. Melbourne.
Tiwari A, Yeo TK, Riris S, Moghal M, Williams S, Wijesundera N, Mehrotra R, Syed A, Navaratnam, R Meleagros L. The distribution and pathological staging of colorectal cancer in a multiethnic population in England. Association of Surgeons of Great Britain and Ireland (ASGBI) 2006, Edinburgh.
Tiwari A, Myint F, Hamilton G. Recognition and treatment of abdominal compartment syndrome(ACS): a questionnaire study of intensive care units in the United Kingdom. World congress on Abdominal Compartment Syndrome 2004, Noosa, Australia.
Cheng KS, Tiwari A, Boutin A, Morris R, Denton CP, Black C, Seifalian AM, Hamilton G. Differentiation of primary and secondary Raynaud's disease by the carotid arterial stiffness. European Society of Vascular Surgery (ESVS) meeting 2002, Istanbul.
Cheng KS, Tiwari A, Morris R, Hamilton G, Seifalian AM. The influence of peripheral vascular disease on the carotid and femoral viscoelastic properties and intima-media thickness in subjects with abdominal aortic aneurysm. Society of Academic and Research Surgeons (SARS) 2002, Dublin.
Salacinski HJ, Tiwari A, Carson RJ, Edwards A, Bowald S, Seifalian AM, Hamilton G. In vivo biocompatibility and biostability of a novel compliant microporous poly(carbonate-urea) urethane vascular graft. International Society for Applied Cardiovascular Biology 2002, St. Galen, Switzerland.
Tiwari A, Salacinski H, Punshon G, Cheng KS, Hamilton G, Seifalian AM. Improving endothelial cell retention in seeding with RGD/Heparin bonded graft under physiological shear stress. Society of Academic and Research Surgeons (SARS), 2002, London.
Tiwari A, Douek M, Khot U.P, Beyzade B Ackroyd JS. The prevalence and importance of cosmetic symptoms in patients undergoing varicose vein surgery. Venous Forum 2000, Chester.
Tiwari A, Green D, Krijsman B, Tinkler K, Boutin A, Myint F, Hamilton G. The value of one stop venous duplex scanning in the outpatient assessment of chronic swelling. Venous Forum 2001, Gloucester.
Salacinski HJ, Seifalian AM, Tiwari A, Goldner S, Punshon G, Carson R, Edwards A, Hamilton G. Usage of an unique artificial knee joint to determine the mechanical stability of a poly(carbonate-urea)urethane ‘MyoLink’ in knee joint movements as experienced in normal and work related situations. Experimental Biology 2001, Florida.

Poster

J Robbie, D Tomkins, L Kelly, I Wilson, M Saeed, M David, A Tiwari. A Prospective Audit of Patients Admitted Into an Acute Hospital From an Outpatient Podiatry-led Clinic – Patient Outcomes and Service Developments. Diabetes UK 2020
Madani D, Tiwari A, David M, Saeed M. The Role of Microbiological Cultures in Managing Diabetic Foot Osteomyelitis. Diabetes UK 2020
Madani D, Tiwari A, David M, Saeed. The role of microbiological cultures in managing diabetic foot osteomyelitis. Society for Endocrinology, UK 2019
Tiwari A. Utilising a 4f sheath approach in the percutaneous management of lower limb peripheral vascular disease. British society of Endovascular Therapy (BSET), 2018.
Zhou Yuheng, Vijayan V, Sidhu HRS, Tiwari A, Pelingon E, Soho A. Saccular aneurysm of the internal carotid artery: applications of duplex ultrasound in diagnosis. Society for Vascular Ultrasound (SVU), 2018, USA.
Rajalingam V, Iqbal N, Vatish J, Tiwari A. Risk factors for proximity of occlusions of great saphenous and short saphenous vein to the deep veins following endovenous laser ablation. European Venous Forum, Portugal 2017. (Prize winner)
Britton H, Tiwari A. Selective puncture of the superficial femoral artery for antegrade angioplasty is safe and effective. British society of Endovascular Therapy (BSET), 2017. (Prize winner)
Lowry D, Narendran P, Saeed M, Tiwari A. Outcomes following lower limb angioplasty in Diabetes Mellitus (DM). Controversies and updates in vascular surgery(CACVS), Paris 2016.
Lowry D, Narendran P, Saeed M, Tiwari A. Distribution of infra-popliteal peripheral vascular disease in patients with diabetes compared to patients without. ESVS 2016.
De Brito M, Bapu D, Tiwari A. Does routine duplex surveillance for restenosis post carotid endarterectomy have any benefit? West Midlands surgical Society (WMSS) 2015.
Lowry D, Kay M, Tiwari A. Outcome of vascular surgeons undertaking peripheral angioplasty. British society of Endovascular Therapy (BSET), Stratford, 2015.
Lowry D, Chisman R, Saeed M, Tiwari A, David M. Management of diabetic foot infection in a tertiary hospital in the UK; microbiological testing strongly influences the antibiotics treatment. International Symposium on the Diabetic foot. Hague, 2015.
Lowry D, Narendran P, Saeed M, Hodson J, Tiwari. Do diabetic have a higher proportion of infra-popliteal disease compared to non-diabetics? A pilot study. International Symposium on the Diabetic foot. Hague, 2015.
Brogden T, Sellars H, Hodson J, Tiwari A. Can strategies to reduce lower limb major amputation rates be focused by socioeconomic areas? Prize poster at West Midlands Surgical Society (WMSS) 2014.
Barker T, Evison F, Ray D, Tiwari A. Incidence of deep venous thrombosis after differing varicose vein procedures. Vascular Society (VS) 2014, Glasgow.
Lowry D, Chisman R, Saeed M, Tiwari A, David M. Microbiology diagnostics and antibiotic treatment in diabetic foot infection in a teaching hospital. Federation of Infection Societies. Harrogate 2014
SN Iqbal, Majid Z, A Tiwari A, Wilson I, Saeed M. Do we care about our diabetic patients’ feet?: diabetic foot examination at the front-door. Diabetes UK Professional Conference 2012, Glasgow.
Tiwari A, Slim H, Ritter C, Rashid H. Lower limb distal revascularisation in ethnic minorities in U.K. DFCon 2010, Washington.
Slim H, Tiwari A, Ritter C, Rashid H. Outcome of leg bypasses using less than 3mm vein conduit in critical leg ischemia. American Vascular Society, 2010, Boston, USA.
Ritter C, Slim H, Tiwari A, Rashid H. Is distal bypass justified in patients with renal failure? DFCon 2010, Washington.
Tiwari A, Louth S, Myint F, Hamilton G. Recognition and treatment of abdominal compartment syndrome(ACS): a questionnaire study of intensive care units in the United Kingdom. Association of Surgeons of Great Britain and Ireland (ASGBI) 2005, Glasgow.
Tiwari A, Jain S, Louth S, Myint F, Hamilton G. Recognition and treatment of abdominal compartment syndrome(ACS): a questionnaire study of intensive care units in the United Kingdom. Intensive care Society 2004, London.
Tiwari A, Kumar Y, Walkay G, Ross S, Peters JL. Correlation of a visually inflammed appendix with histological analysis: a prospective study. RCSEd clinical and scientific meeting 2003, Edinburgh.
Seifalian AM, Tiwari A, Punshon G, Salacinski H, Kidane A, Hamilton G. Dynabead toxicity to endothelial cells at high bead concentration: implication for single stage seeding of vascular bypass grafts. Experimental Biology 2003, San Diego.
Cheng KS, Tiwari A, Seifalian AM, Hamilton G. The influence of peripheral vascular disease on the carotid and femoral viscoelastic properties and intima-media thickness in subjects with abdominal aortic aneurysm. Association of Surgeons in Training 2002, Sheffield.
Cheng KS, Tiwari A, Baker CR, Morris R, Seifalian AM, Hamilton G. The influence of Impaired carotid and femoral viscoelastic properties and elevated intima-media thickness in peripheral vascular disease. Association of Surgeons in Training 2002, Sheffield.
Punshon G, Tiwari A, Salacinski H, Seifalian AM, Baker DM, Myint F, Hamilton G. Is peritoneal lavage a suitable source of mesothelial cells for seeding of prosthetic graft? International Society for Applied Cardiovascular Biology 2002, St. Galen, Switzerland.
Salacinski HJ, Tiwari A, Punshon G, Carson RJ, Edwards A, Seifalian AM, Hamilton G. MyoLink A novel poly(carbonate-urea)urethane vascular graft: a comprehensive in vitro degradation study. International Society for Applied Cardiovascular Biology 2002, St. Galen, Switzerland.
Tiwari A, Salacinski H, Punshon G, Cheng KS, Hamilton G, Seifalian AM. Improving endothelial cell retention in seeding with RGD/Heparin bonded graft under physiological shear stress. International Society for Applied Cardiovascular Biology 2002, St. Galen, Switzerland.
Tiwari A, Salacinski H, Punshon G, Cheng KS, Hamilton G, Seifalian AM. Evaluating mediastinal fat as a source for endothelial cell extraction for seeding in coronary artery bypass graft. International Society for Applied Cardiovascular Biology 2002, St. Galen, Switzerland.