Publications
241 results found
Pinto A, Faiz O, Bicknell C, et al., 2013, An interview study on surgical patients' experiences of surgical complications, PSYCHOLOGY & HEALTH, Vol: 28, Pages: 291-291, ISSN: 0887-0446
Bicknell CD, Powell JT, 2013, Thoracic aortic aneurysms, BRITISH JOURNAL OF SURGERY, Vol: 100, Pages: 850-852, ISSN: 0007-1323
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- Citations: 3
Muttardi K, Haydar A, Phua CK, et al., 2013, An underused opportunity to introduce ACE inhibitors and influence prognosis: observational study of patients undergoing aortic surgery, JRSM Open, Vol: 4, ISSN: 2054-2704
OBJECTIVE: To asses whether Angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin receptor blockers (ARBs) are underused in patients with aortic disease due to concerns regarding flow limiting (>70%) renal artery stenosis (RAS). DESIGN: A prospective analysis of patients admitted for aortic surgery was performed (January-July 2009). Co-morbidity, ACEI/ARB use and renal function were recorded. Computerised tomography (CT) angiograms were reviewed by a single blinded radiologist for the presence and severity of RAS. SETTING: St Mary's Hospital, Vascular Unit, Imperial College Healthcare NHS Trust, London, UK. PARTICIPANTS: 75 randomly selected patients admitted to our vascular unit including elective and emergency admissions. MAIN OUTCOME MEASURES: Indications for ACEI therapy were identified as determined by the National Institute of Health and Clinical Excellence (NICE) guidance. The ratio of the measurement distal to the stenosis and at the area of maximal stenosis on CT angiography were used to calculate the percentage RAS. RESULTS: 60 patients were identified (15 patients excluded due to previously modified renal vessels). The median age was 73 [interquartile range 68, 77]. Their underlying aortic disease included 52 (87%) aortic aneurysm, 6 (10%) with aortic dissection, 1 (1.7%) patient with occlusive disease and 1 (1.7%) patient with mycotic disease. Overall, 56/60 (93%) patients had at least one indication for ACEI therapy. 33/60 (55%) of patients were already receiving ACEI. CT angiogram examination demonstrated 17/60 (28%) patients have RAS of some degree, of which only 9/60 (15%) have flow limiting RAS. CONCLUSION: A large proportion of aortic patients do not receive ACEI/ARB therapy despite definite indications and a low prevalence of flow-limiting RAS is low. After the exclusion of RAS at angiography, careful introduction of ACEI therapy with appropriate monitoring could be considered for many more patients.
Rolls AE, Riga CV, Bicknell CD, et al., 2013, A Pilot Study of Video-motion Analysis in Endovascular Surgery: Development of Real-time Discriminatory Skill Metrics, EUROPEAN JOURNAL OF VASCULAR AND ENDOVASCULAR SURGERY, Vol: 45, Pages: 509-515, ISSN: 1078-5884
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- Citations: 34
Mason SL, Kuruvilla S, Riga CV, et al., 2013, Design and Validation of an Error Capture Tool for Quality Evaluation in the Vascular and Endovascular Surgical Theatre, EUROPEAN JOURNAL OF VASCULAR AND ENDOVASCULAR SURGERY, Vol: 45, Pages: 248-254, ISSN: 1078-5884
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- Citations: 16
Cheshire N, Bicknell C, 2013, Thoracic endovascular aortic repair: The basics, JOURNAL OF THORACIC AND CARDIOVASCULAR SURGERY, Vol: 145, Pages: S149-S153, ISSN: 0022-5223
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- Citations: 4
Cochennec F, Riga C, Hamady M, et al., 2013, Improved Catheter Navigation With 3D Electromagnetic Guidance, JOURNAL OF ENDOVASCULAR THERAPY, Vol: 20, Pages: 39-47, ISSN: 1526-6028
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- Citations: 21
Riga CV, Bicknell CD, Rolls A, et al., 2013, Robot-assisted Fenestrated Endovascular Aneurysm Repair (FEVAR) Using the Magellan System, JOURNAL OF VASCULAR AND INTERVENTIONAL RADIOLOGY, Vol: 24, Pages: 191-196, ISSN: 1051-0443
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- Citations: 85
Rafii-Tari H, Liu J, Lee SL, et al., 2013, Learning-based modeling of endovascular navigation for collaborative robotic catheterization., Pages: 369-377
Despite rapid growth of robot assisted catheterization in recent years, most current platforms are based on master-slave designs with limited operator-robot collaborative control and automation. Under this setup, information concerning subject specific behavior and context-driven manoeuvre is not re-utilized for subsequent intervention. For endovascular catheterization, the robot itself is designed with little consideration of underlying skills and associated motion patterns. This paper proposes a learning-based approach for generating optimum motion trajectories from multiple demonstrations of a catheterization task such that it can be used for automating catheter motion within a collaborative setting. Motion models are generated from experienced manipulation of a catheterization procedure and replicated using a robotic catheter driver to assist inexperienced operators. Catheter tip motions of the automated approach are compared against the manual training sets for validating the proposed framework. The results show significant improvements in the quality of catheterization, which facilitate the design of hands-on collaborative robots that make full use of the natural skills of the operators.
Lee S, Kwok K, Wang L, et al., 2013, Motion-adapted catheter navigation with real-time instantiation and improved visualisation, Journal of Robotic Surgery, Vol: 7, Pages: 251-260, ISSN: 1863-2483
Riga CV, Bicknell CD, Hamady MS, et al., 2013, Endovascular robotics for complex aortic intervention, ENDOVASCULAR AND HYBRID THERAPIES FOR STRUCTURAL HEART AND AORTIC DISEASE, Editors: Kpodonu, Bonan, Publisher: JOHN WILEY & SONS LTD, Pages: 110-117
Zimmo L, Rudarakanchana N, Thompson M, et al., 2012, Renal artery aneurysm formation secondary to pseudoxanthoma elasticum, J Vasc Surg
Khamis R, Chang S-H, Boyle J, et al., 2012, Abstract 15370: The Development of LO1, a Novel IgG Monoclonal Natural Antibody, for the Near Infra-Red (NIRF) Imaging of Oxidised LDL in Atherosclerosis, CIRCULATION, Vol: 126, ISSN: 0009-7322
Khamis RY, Chang S-H, Boyle JJ, et al., 2012, THE GENERATION AND CHARACTERISATION OF LO1: A UNIQUE IGG MONOCLONAL NATURAL ANTIBODY AGAINST OXIDISED LDL (OXLDL), Joint Spring Meeting of the British-Society-for-Cardiovascular-Research (BSCR) and British-Atherosclerosis-Society (BAS), Publisher: BMJ PUBLISHING GROUP, Pages: A6-A6, ISSN: 1355-6037
Adu J, Cheshire NJ, Riga CV, et al., 2012, Strategies to Tackle Unrecognized Bilateral Renal Artery Occlusion After Endovascular Aneurysm Repair, ANNALS OF VASCULAR SURGERY, Vol: 26, ISSN: 0890-5096
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- Citations: 11
Al-Lamee R, Broyd C, Parker J, et al., 2012, Influence Of Gender On Clinical Outcomes Following Transcatheter Aortic Valve Implantation: Results From The UK TAVI Registry On Behalf Of The UK TAVI Steering Group And The National Institute For Cardiovascular Outcomes Research, Transcatheter Cardiovascular Therapeutics (TCT) Symposium, Publisher: ELSEVIER SCIENCE INC, Pages: B30-B30, ISSN: 0735-1097
Riga CV, Bicknell CD, Hamady M, et al., 2012, Tortuous iliac systems-asignificant burden to conventional cannulation in the visceral segment: is there a role for robotic catheter technology?, J Vasc Interv Radiol, Pages: 1369-1375, ISSN: 1051-0443
Perera AH, Hamady MS, Cheshire NJ, et al., 2012, A Custom-made Endovascular Treatment Strategy in a Patient with Marfan's Disease, EJVES Extra, Vol: 24, ISSN: 1533-3167
Introduction: We present a young female with Marfan's Syndrome and aortic dilatation between two previous dacron grafts of the descending thoracic and abdominal aorta after type B dissection. Report: Open retrograde visceral revascularisation was undertaken and a single bespoke stent-graft used to exclude the aneurysm. A custom-made stent overcame some of the limitations of standard devices. A 50 mm proximal stent diameter was used to seal the landing zone in the dilated dacron thoracic graft. Discussion: A single custom-made stent avoided multiple stent requirements to accommodate significant proximal/distal size discrepancy and reduced risk of type III endoleak in this young patient with complex disease. © 2012 European Society for Vascular Surgery.
Powell S, Verma A, Booton P, et al., 2012, How an online questionnaire can explore leadership teaching in an undergraduate curriculum, JRSM Open, Vol: 3, ISSN: 2054-2704
OBJECTIVES: To design a tool to explore current leadership teaching in an undergraduate curriculum, using the medical leadership competency framework (MLCF) DESIGN: An online questionnaire was designed based on the MLCF competences and sent to all course leads at Imperial College, London in Autumn 2011 SETTING: Imperial College, London PARTICIPANTS: Sixty-nine course leads were invited to participate in the questionnaire study MAIN OUTCOME MEASURES: Course leads were asked whether they teach each MLCF competence, which teaching methods they use, and how long they spend teaching each competency RESULTS: Overall there was a 78% questionnaire response rate (54/69). From the questionnaires received it was possible to extrapolate results across the remaining courses to achieve a 100% response rate. We were then able to produce a map of current leadership teaching showing that all MLCF competences are taught to varying degrees across the curriculum. The tool does not however provide information on the quality of teaching provided, or what students learn CONCLUSIONS: There is a strong emphasis on the development of teaching leadership skills to undergraduates in Tomorrow's Doctors 2009 (TD09). It is difficult to know what teaching occurs across the curriculum of a large medical school. The design of a simple, electronic questionnaire will enable medical schools to map their current leadership teaching to the TD09 outcomes. This will help to inform further curriculum development and integration as well as signposting of learning opportunities.
Morbi AHM, Hamady MS, Riga CV, et al., 2012, Reducing Error and Improving Efficiency during Vascular Interventional Radiology: Implementation of a Preprocedural Team Rehearsal, RADIOLOGY, Vol: 264, Pages: 473-483, ISSN: 0033-8419
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- Citations: 25
Ambler G, Boyle JR, Cousins C, et al., 2012, Early Results of Fenestrated Endovascular Repair of Juxtarenal Aortic Aneurysms in the United Kingdom, CIRCULATION, Vol: 125, Pages: 2707-2715, ISSN: 0009-7322
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- Citations: 137
Patel SR, Gohel MS, Hamady M, et al., 2012, Reducing errors in combined open/endovascular arterial procedures: influence of astructured mental rehearsal before the endovascular phase., J Endovasc Ther., Pages: 383-389
Bicknell CD, Hinchliffe RJ, 2012, Challenges for Off-the-Shelf Fenestrated Stent-Grafting, JOURNAL OF ENDOVASCULAR THERAPY, Vol: 19, Pages: 179-181, ISSN: 1526-6028
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- Citations: 1
Bicknell CD, Hinchliffe RJ, 2012, Commentary: Challenges for off-the-shelf fenestrated stent-grafting., J Endovasc Ther, Vol: 19, Pages: 179-181
Chang S-H, Johns M, Boyle JJ, et al., 2012, Model IgG Monoclonal Autoantibody-Anti-Idiotype Pair for Dissecting the Humoral Immune Response to Oxidized Low Density Lipoprotein, HYBRIDOMA, Vol: 31, Pages: 87-98, ISSN: 1554-0014
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- Citations: 10
Shah C, Riga C, Stoyanov D, et al., 2012, Video motion analysis for objective assessment in catheter-based endovascular intervention, 46th Annual Scientific Meeting of the Vascular-Society-of-Great-Britain-and-Ireland, Publisher: WILEY-BLACKWELL, Pages: 12-12, ISSN: 0007-1323
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- Citations: 4
Mari JM, Khoo M, Riga C, et al., 2012, Index proposal and basic estimator study for quantification of oscillation of the secondary flow pattern in tortuous vessels, ULTRASONICS, Vol: 52, Pages: 294-305, ISSN: 0041-624X
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- Citations: 2
Rafii-Tari H, Payne CJ, Riga C, et al., 2012, Assessment of navigation cues with proximal force sensing during endovascular catheterization, Pages: 560-567, ISSN: 0302-9743
Despite increased use of robotic catheter navigation systems for endovascular intervention procedures, current master-slave platforms have not yet taken into account dexterous manipulation skill used in traditional catheterization procedures. Information on tool forces applied by operators is often limited. A novel force/torque sensor is developed in this paper to obtain behavioural data across different experience levels and identify underlying factors that affect overall operator performance. The miniature device can be attached to any part of the proximal end of the catheter, together with a position sensor attached to the catheter tip, for relating tool forces to catheter dynamics and overall performance. The results show clear differences in manipulation skills between experience groups, thus providing insights into different patterns and range of forces applied during routine endovascular procedures. They also provide important design specifications for ergonomically optimized catheter manipulation platforms with added haptic feedback while maintaining natural skills of the operators.
Sidhu R, Weir-McCall J, Cochennec F, et al., 2012, Evaluation of an Electromagnetic 3D Navigation System to Facilitate Endovascular Tasks: A Feasibility Study, EUROPEAN JOURNAL OF VASCULAR AND ENDOVASCULAR SURGERY, Vol: 43, Pages: 22-29, ISSN: 1078-5884
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- Citations: 18
Rafii-Tari H, Payne CJ, Riga C, et al., 2012, Assessment of Navigation Cues with Proximal Force Sensing during Endovascular Catheterization., MICCAI (2), Publisher: Springer, Pages: 560-567
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