- Original Article
- Open Access
Clinical and endovascular practice in interventional radiology: a contemporary European analysis
© The Author(s) 2018
Received: 17 November 2017
Accepted: 22 January 2018
Published: 28 June 2018
The purpose of this survey was to determine the current trends in endovascular practice by Interventional Radiologists (IR’s) across Europe and to understand the engagement by Interventional Radiology (IR) with clinical practice. CIRSE European members were invited to participate in an online survey between July 11th, 2016 and August 8th, 2016. A 54 question survey was created to capture a comprehensive overview of IR endovascular practice and clinical engagement.
Four hundred and five valid responses were received (9.9%) from a broad geographic distribution from across Europe. 76% of IR’s practised in centres with more than 400 beds as 60% worked in an academic or university teaching hospital. 36% dedicated 80–100% of their time to IR and 59% dedicated at least 60% of their time to IR. 24/7 IR on-call was available in the hospitals of 73% or respondents. 78% had dedicated IR nursing staff and 67% had nursing support on-call, 55% had inpatient admission privileges and 27% had dedicated IR inpatient beds. 65% of IR’s had admitting rights to day-case beds. 42% ran IR outpatient clinics and 36% performed ward rounds. 81% of respondents performed peripheral arterial disease (PAD) intervention and IR was the main provider of PAD intervention in 67% of centres. Vascular Surgery or Medicine were the main referrers (71%) to IR for PAD intervention. 37% of centres had a hybrid operating theatre and 80% of IR’s had access to this.
IR remains a substantial player in the field of PAD Intervention. The continued evolution of outpatient clinics and clinical practice is key to retention and future expansion in the field of endovascular therapy for PAD.
Interventional radiology (IR) as a subspecialty of Radiology, has evolved and matured substantially over the past decade. IR is now an essential part of modern medical practice, offering minimally invasive therapies across a wide spectrum of conditions and body systems, both in the acute and elective setting. In Europe, IR gained recognition in 2009 as a distinct specialty within Radiology from the Union of European Medical Specialists (UEMS). Following this, there have been parallel efforts in many European countries to establish IR as a distinct specialty within Radiology, supported by the Cardiovascular and Interventional Radiology Society of Europe (CIRSE) (Lee et al. 2014). Training, assessment and certification of IR specialists have also become increasingly structured with a defined training curriculum and certification in the form of the European Board of Interventional Radiology (EBIR) diploma which has been widely adopted across Europe and also in Australia and New Zealand (Belli et al. 2014; CIRSE 2010; CIRSE 2013).
Over the past decade, there have been increasing demands for IR services due to the expansion of practice in many areas such as the endovascular treatment of acute conditions (eg. ischaemic stroke, trauma, gastrointestinal tract bleeding and complex endovascular aortic aneurysm repair) and elective embolisation (eg. uterine and prostate artery embolisation) and Interventional Oncology (IO) (Tsetis et al. 2016). Nevertheless, it remains unclear how much progress has been made in the clinical practice of IR across Europe over the past decade since the last survey conducted by CIRSE in 2007 (Keeling et al. 2009). Furthermore, the increasing involvement of other specialties such as Vascular Surgery, Cardiology and invasive Angiology in the endovascular treatment of peripheral vascular disease (PVD) has undoubtedly changed the landscape of IR practice. The purpose of this study was to determine the contemporary trends of clinical and endovascular practice by IR across Europe and to understand the gaps in IR specialty development.
All active professional CIRSE European members (n = 4090) were invited by email in 2016 to participate in an online survey. Data collection was performed between 11th July-8th August 2016. The survey involved completion of a detailed but simple online response form consisting of 54 questions . The form was designed to be user-friendly and featured a simple button-driven interface to facilitate participation by as many interventional radiologists as possible. Broadly, the questions aimed to capture a comprehensive overview of IR practice including the demographic origin of the respondent, IR experience and workload, type of practice and hospital size, availability of IR outpatient clinics, inpatient beds, admitting privileges, availability of 24/7 IR on-call services, availability of IR nurses, technologic staff and trainees, involvement in endovascular treatment of PAD, local infrastructure and access to hybrid operating theatres as well as details regarding funding and reimbursement for IR procedures.
List of countries by response rate
Country of practice
IR clinical practice
Results of survey
Response, % (n)
Years of IR practice
Time dedicated to IR
Setting of day-bed
IR inpatient admission privileges
Dedicated IR inpatient beds
Perform ward rounds
IR outpatient clinic
Participate in 24/7 IR on-call
Dedicated IR nurses
Nursing support on call
Yes, dedicated IR nurse
Yes, non-IR nurse
Technologist support on-call
IR trainees at your centre
Perform endovascular PAD interventions
Percentage of endovascular PAD treated by IR
Hybrid OR in the hospital
IR access to hybrid OR
IR endovascular practice
IR has come a long way since its humble beginnings in the 1960s and the wide spectrum of minimally invasive image-guided therapies offered by interventional radiologists are now an essential part of modern medicine. However, even the venerable Charles Dotter, father of IR, cautioned in 1968 that radiologists need to assume clinical responsibilities for their practice or risk becoming “high-priced plumbers” and losing out to competing specialties (Rosch et al. 2003). Indeed, trends in the United States at the turn of the twenty-first century have shown an exponential increase in the volume of endovascular peripheral arterial procedures performed by Vascular surgery and Cardiology compared to IR (Levin et al. 2005). Although this is largely due to the move towards an endovascular-first approach to the treatment of PAD and the corresponding increase in volume of endovascular work, the lack of clinical presence by IR, upskilling of competing specialties and diversification of IR practice to other emerging fields such as IO have undoubtedly contributed to this trend (Choke and Sayers 2015).
Nevertheless, the results of our survey show that the majority of European IRs remain clinically active in endovascular peripheral arterial interventions and that in over two-thirds of European centres, IR remains the main provider of endovascular peripheral arterial procedures. Similar to previously observed trends by Levin et al. in the United States, Vascular surgery is the largest competing specialty in Europe with Cardiology and Angiology following behind.
In Europe, IR also remains the leading producer of research in the field of endovascular PAD therapy particularly in the studies related to infrapopliteal and pedal interventions and drug-eluting technology (Asadi et al. 2017). However, it is imperative that interventional radiologists continue efforts to maintain our presence in the endovascular field and produce meaningful academic contributions to advance and lead the way forward in the next generation of endovascular therapies. Current interventional radiologists and IR trainees need to embrace the role of an “IR clinician” who understands the current evidence-base and gaps in knowledge where future research can be directed, is able to clinically assess and manage their patients in a holistic manner to ensure that best clinical care and evidence can be individualized to each specific situation and is technically proficient and safe in performing and delivering minimally-invasive therapies. In addition, the challenging and evolving landscape of endovascular practice requires IRs to be able to work in a multidisciplinary setting and develop partnerships with other referring specialties to ensure that patients continue to benefit from the added value of IR. The setting up of outpatient clinics to take direct patient referral and the attainment of clinical skills during IR training are vital ingredients for the future of our specialty. Teaching IR to medical students in dedicated curricula is also important to educate future referrers and to attract students to IR. Mentoring students, setting up IR electives and fostering research with students in IR are also significant factors in engaging medical students and stimulating an interest in IR.
Since our previous IR clinical practice survey a decade ago, there has been substantial progress in the development of clinical practice within the specialty. More respondents are now dedicating the majority of their clinical commitment to IR, supported by dedicated IR nurses and technologists and the majority also provide a 24/7 IR on-call service. European IR is fortunate to have a large proportion of experienced practitioners, with over two-thirds of respondents having practiced for over 10 years in the field. The proportion of respondents who run IR outpatient clinics has increased from 26% in 2007 to 42% in the current survey, but there remains room for improvement. The number of dedicated IR inpatient beds (17% in 2007 vs 28% currently) remains low. The proportion of inpatient admission privileges has also decreased from 86% in 2007 to 55% in the present survey. However, as many of the procedures we perform can be delivered in an ambulatory setting, respondents had greater access to day-case beds which has increased from 31% in 2007 to 61%. Indeed, the practice of day-case peripheral angioplasty has been established over the past decade and emerging experience with the transradial access technique will facilitate the further expansion of an ambulatory approach to other endovascular therapies (Spiliopoulos et al. 2016; Posham et al. 2016; Huang et al. 2008). Just over one-third of respondents (36%) perform ward rounds in their clinical practice, however this component of practice was not previously surveyed in 2007 to allow accurate comparison. Nevertheless, as interventional radiologists continue to embrace clinical responsibilities, the requirement for presence in both outpatient clinics and wards will undoubtedly follow.
A majority of respondents practice in large tertiary or university teaching hospitals and many have trainees in their unit. The development of IR outpatient and inpatient clinical services should continue to be encouraged to ensure that future generations of IRs have exposure to these essential components of training. Understandably, development of clinical practice varies from institution to institution and progress is commonly hampered by a combination of shortages of manpower, funding and competition for access to limited inpatient beds and support from hospital management or national health service providers. As many respondents are also practicing in larger teaching units, there is a possibility of selection bias in our survey reflecting responses from those who are more active in the endovascular field. Therefore, the results related to endovascular practice may not accurately reflect “real world” practice in all centres. Nevertheless, it does provide a valuable insight into the present state of practice and will serve as a baseline for future comparisons.
The results from this survey are encouraging in that IR remains a substantial player in the field of endovascular intervention with increasing development of clinical practice models and day-case intervention. The evolution of clinical practice and outpatient clinics is key to the ability to take direct referrals into the future. This will allow IR to maintain a substantial role in the field of endovascular therapy in PAD. Teaching IR to the next generation of doctors is also vitally important, not only to ensure appropriate IR manpower resources into the future, but also to educate future doctors with regard to the utility of IR in treating patients, so that they can refer appropriately.
We would like to thank the CIRSE staff who helped distribute and collate study data.
Availability of data and materials
Raw data is available if required.
All authors involved in data analysis, manuscript preparation and review. All authors read and approved the final manuscript.
Ethics approval and consent to participate
Not required as no human or animal subjects.
Consent for publication
All authors have consented to publication.
The authors declare that they have no competing interests.
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
- Asadi H, Lee RJ, Sheehan M et al (2017) Endovascular therapy research in lower limb peripheral arterial disease published over a 5-year period: who is publishing and where? Cardiovasc Intervent Radiol 40(3):343–350View ArticlePubMedGoogle Scholar
- Belli AM, Reekers JA, Lee M (2014) The importance of curriculum-based training and assessment in interventional radiology. Cardiovasc Intervent Radiol 37(1):8–10View ArticlePubMedGoogle Scholar
- Choke E, Sayers R (2015) Viewpoint: adaptation of vascular surgery in the interventional era. Heart 101(5):342–345View ArticlePubMedGoogle Scholar
- CIRSE. The European Board of Interventional Radiology (2010) Available from: http://www.cirse.org/ebir. Accessed 1 June 2018
- CIRSE. European curriculum and syllabus for interventional radiology (2013) Available from: http://www.cirse.org/curriculum_syllabus. Accessed 1 June 2018
- Huang DY, Ong CM, Walters HL et al (2008) Day-case diagnostic and interventional peripheral angiography: 10-year experience in a radiology specialist nurse-led unit. Br J Radiol 81(967):537–544View ArticlePubMedGoogle Scholar
- Keeling AN, Reekers JA, Lee MJ (2009) The clinical practice of interventional radiology: a European perspective. Cardiovasc Intervent Radiol 32(3):406–411View ArticlePubMedGoogle Scholar
- Lee MJ, Belli AM, Brountzos E, Morgan R, Reekers JA (2014) Specialty status for interventional radiology: the time is now. Cardiovasc Intervent Radiol 37(4):862View ArticlePubMedGoogle Scholar
- Levin DC, Rao VM, Parker L et al (2005) The changing roles of radiologists, cardiologists, and vascular surgeons in percutaneous peripheral arterial interventions during a recent five-year interval. J Am Coll Radiol 2(1):39–42View ArticlePubMedGoogle Scholar
- Posham R, Biederman DM, Patel RS et al (2016) Transradial approach for noncoronary interventions: a single-center review of safety and feasibility in the first 1,500 cases. J Vasc Interv Radiol 27(2):159–166View ArticlePubMedGoogle Scholar
- Rosch J, Keller FS, Kaufman JA (2003) The birth, early years, and future of interventional radiology. J Vasc Interv Radiol 14(7):841–853View ArticlePubMedGoogle Scholar
- Spiliopoulos S, Karnabatidis D, Katsanos K et al (2016) Day-case treatment of peripheral arterial disease: results from a multi-center European study. Cardiovasc Intervent Radiol 39(12):1684–1691View ArticlePubMedGoogle Scholar
- Tsetis D, Uberoi R, Fanelli F et al (2016) The provision of interventional radiology Services in Europe: CIRSE recommendations. Cardiovasc Intervent Radiol 39(4):500–506View ArticlePubMedGoogle Scholar