Introduction

The use of PoCUS is becoming increasingly widespread in clinical practice, as ultrasound machines become more portable and less expensive [1]. While several authors have studied the usefulness of PoCUS in clinical practice and promote its usage, others claim a lack of evidence to endorse it [2,3,4,5]. The enthusiasm surrounding PoCUS has grown in line with the recommendations and position papers from ultrasound societies and expert consensus statements, which promote and endorse the teaching of PoCUS in medical schools before the postgraduate curriculum [6,7,8,9]. A recently published expert consensus recommendation proposed the development of a standardized undergraduate medical curriculum of basic PoCUS training, while advocating for additional research in medical education and PoCUS use in clinical practice [10].

Although surveys about PoCUS teaching have been conducted in North American medical schools and in German-speaking countries using questionnaires sent directly to universities, this has not yet been done at the scale of Europe [11,12,13,14,15]. Some authors previously explored the issue of PoCUS teaching in medical schools in Europe by interviewing the members of organizations promoting PoCUS instead of gathering information directly from the university itself [16]. This survey therefore aims to provide an overview of the current state of PoCUS teaching in the 27 countries of European Union (EU) and to analyze the current and future teaching approaches as well as any barriers to PoCUS training in medical schools.

Methods

Study setting

A questionnaire about PoCUS teaching for undergraduate medical students was designed using simple, short, and mostly multiple-choice questions [17]. Questions were designed in a closed-response format and written in English. Respondents could answer in an open-response format if none of the answers seemed appropriate. The questionnaire was constructed using the SurveyMonkey® online questionnaire builder and could not be completed more than once. As the questionnaire did not involve any patients or personal data, ethics committee approval was thus optional. The first part of the questionnaire covered demographic data about the respondent and his/her university, while the second part focused on the availability, description, and content of undergraduate PoCUS courses. If no PoCUS courses were available at the university, respondents were asked about future plans to develop such courses.

Data collection

Using an internet search, we identified all the universities teaching medicine in the EU as well as the email addresses of their deans and administration offices. We found a total of 285 medical schools in 26 EU countries, with Luxembourg being the only country without a medical school. To reach a confidence level of 95% with a 5% margin of error, a sample size of 164 respondents was required. An email containing an internet link to the survey was sent to the deans of all the identified medical schools. The email was sent in four successive waves between November 9, 2022, and June 15, 2023, to cover the 2022–2023 academic year.

Statistical analysis

The software SAS 9.4 was used to analyze the anonymized data. Continuous variables describing the study population were expressed using means, standard deviations, and minimum and maximum values. Discrete variables were reported by category as numbers and percentages. Fisher’s exact test was used to compare discrete variables.

Results

Of the 26 EU countries with at least one medical school, 19 (73%) are represented in the survey responses. Figures 1 and 2 illustrate the countries that currently offer or intend to offer a PoCUS course in at least one of their medical schools. Of the 285 medical schools in the EU, 77 (27%) started the questionnaire. Of the 58 (20%) medical schools answering the primary outcome question about whether they had a specific PoCUS course, only 18 (31% [95% CI 20.4–41.7]) currently offer such a curriculum at their institution. The margin of error calculated for 58 respondents is 11.5%. Among the respondents, 38 (65%) provide or intend to provide a dedicated PoCUS course. Table 1 summarizes the profiles of the respondents. A total of 43 (74%) respondents completed the questionnaire, thus allowing secondary outcome analysis. Of the 18 medical schools currently offering a PoCUS course, 16 completed the entire questionnaire. Of these 16 medical schools, 12 (75%) provide theoretical sessions, 15 (94%) practical sessions, and 8 (50%) specific PoCUS training during clinical rotations. The number of students attending the theoretical sessions is more than 100 in nine (56%) institutions, between 50 and 100 in one (6%), and less than 50 in six (38%) institutions. Less than 40 h of theoretical teaching is provided in all the medical schools and less than 10 h in seven of them, while seven (44%) use online teaching. For the practical sessions, the teacher–student ratio is 1 to 4 in three (19%) institutions, 1 to 5 in six (38%), and 1 to more than 5 in seven (44%) institutions. Peer teaching is promoted in nine (56%) medical schools. Less than 40 h of practical training is provided in 12 (75%) medical schools. Table 2 summarizes the contents of the PoCUS courses, the teaching aims, the type of practical sessions, the type of assessments, and the ultrasound machines used. PoCUS is taught from the first to 6th year of medical school and is mandatory in eight (50%) of institutions where it is currently taught. Seven (44%) medical schools report longitudinal teaching of PoCUS over several years, whereas nine (56%) offer transversal teaching in which PoCUS is taught with specific subjects or modules such as anatomy, cardiology, gastroenterology, or pneumology. Assessments are conducted in 12 (75%) medical schools.

Fig. 1
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Countries from the European Union with at least one medical school offering a dedicated PoCUS course

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Fig. 2
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Countries from the European Union with at least one medical school intending to offer a dedicated PoCUS course

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Table 1 Profiles of respondents
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Table 2 Comparison of the current and future PoCUS courses
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Of the 40 (69%) surveyed medical schools that do not currently teach PoCUS, 20 (50%) intend to offer PoCUS courses in the future: three (15%) in the coming year, ten (50%) in the next 5 years, and seven (35%) with an unknown timetable. Only 14 out of 20 respondents intending to offer PoCUS courses in the future continued the questionnaire. In ten (71%) cases, the medical school intended to offer both theoretical and practical courses. PoCUS will be taught from the first to 6th year of medical school and will be mandatory in seven (50%) institutions. Table 2 compares the current and future PoCUS courses.

Of the 20 medical schools that do not intend to teach PoCUS at the undergraduate level, 15 (75%) described a range of different limitations: two (13%) mentioned a lack of financial support, six (40%) reported a lack of ultrasound equipment, six (40%) described a lack of trained instructors, one (7%) was not familiar with PoCUS, and one (7%) cited insufficient evidence in the literature to support PoCUS teaching in the undergraduate curriculum.

Discussion

Our study shows that the majority of EU countries have at least one medical school in which PoCUS is currently taught or will be taught in the near future. Indeed, the survey includes 19 out of the 26 EU countries with a medical school. Although we were unable to reach the target sample size of 164 respondents, our survey includes the responses of 58 universities compared with previous studies reporting responses from 79 universities in the United States [12], 13 in Canada [14], and 46 in Europe [16]. In their European survey, Prosch et al. reported that 87% of medical schools include PoCUS teaching compared with only 31% in our study. This substantial difference is perhaps due to the selection of universities by PoCUS experts in the study of Prosch et al., which would have induced a selection bias. For this reason, we believe that our results are more representative of the current EU situation, even though the target sample size was not reached. The profile of respondents is also important when determining the accuracy of responses to the sub-questions. Most of the respondents stated that they were the deans or otherwise involved in the undergraduate medical curriculum, which reinforces our conviction that the findings are relevant.

In their 2020 survey, Prosch et al. reported that 40 of the 46 surveyed medical schools included a theoretical ultrasound course and 26 a practical ultrasound course, whereas in our survey, only 12 medical schools reported theoretical PoCUS courses, 15 included practical PoCUS sessions, and eight integrated PoCUS training into clinical rotations. Theoretical, practical, and clinical teaching are the three essential axes for PoCUS learning [18]. Nonetheless, as the methodology of Prosch et al. and our own survey is quite different, an accurate comparison is difficult.

Although we were unable to reach the number of respondents required for a confidence interval of 95% with a 5% margin of error, the number of respondents included in the primary outcome analysis is not trivial, as it reached the mean response rate of online surveys, ranging from 20 to 47% depending on the study [19]. In our survey, very few medical schools currently teach PoCUS, so the results describing the profile of the PoCUS curriculum should be treated with caution. Furthermore, as the aim of the questionnaire was stated in the survey title, this may have favored respondents with a current PoCUS curriculum or intending to develop one in the future. Therefore, we believe that the proportion of medical schools that teach or plan to teach PoCUS is perhaps less than 65% in the EU. Our study did not evaluate the situation beyond the EU and thus did not include the United Kingdom where PoCUS use is widespread. This is another limitation of our findings. The self-administered nature of the survey nevertheless aimed to ensure the privacy and anonymity of responses and avoid interviewer bias.

Many undergraduate PoCUS curricula have been developed and published [20,21,22], while some have even been prospectively evaluated [23, 24]. Numerous difficulties have nevertheless been reported in integrating PoCUS courses into medical schools. Some studies describe the difficulty in finding qualified teachers, while others are limited by access to ultrasound equipment [25]. Similar concerns were described by our respondents. Indeed, the teacher/student ratio is higher than for other courses, especially for practical sessions and the equipment required is more expensive. Regarding PoCUS teaching, evidence is still required to determine the structure, content, and schedule of the curriculum [5]. Nevertheless, a feasibility study that introduced PoCUS into 1-year anatomy as well as physical examination courses showed that PoCUS courses are well received and perceived as valuable by students [26]. However, students’ appreciation of the curriculum is no guarantee of effective learning. In another study conducted by Liu et al. from 2013 to 2017 on the effect of PoCUS teaching on students’ standardized objective assessments, a statistically significant difference in assessment results for clinical examination performances was found in favor of students undergoing longitudinal PoCUS teaching [27]. In 2018, a scoping review reported how best to integrate PoCUS into the undergraduate curriculum and stressed the possible learning opportunities [28]. For example, informing PoCUS teachers about the body of available literature on the topic of undergraduate PoCUS courses was associated with the best available evidence and future direction for PoCUS teaching in undergraduate education [28]. This review concluded that it was necessary to develop objective tools to assess PoCUS skills and to concentrate efforts on developing PoCUS teaching programs with the intention to deliver robust ultrasound education rather than limiting PoCUS teaching to a few hours [28]. Our survey is consistent with PoCUS teaching in some medical schools, although the number of hours devoted to PoCUS courses is still minimal in the majority of institutions, as the subjects mostly relate to basic ultrasound principles and skills (Table 2). Emphasis is nevertheless given to abdominal PoCUS, as previously reported in a survey of German-speaking medical schools [15]. Less than half of the medical schools that include PoCUS in the curriculum report the use of assessments. The low number of teaching hours combined with the lack of assessments thus suggest that most PoCUS courses are introductory in nature, meaning that medical students are not trained to become autonomous in their clinical practice.

The quality of PoCUS teaching is improved with a multidisciplinary approach [28]. Our survey confirms that PoCUS is taught by a wide range of specialties, including radiology, general medicine, and peer teaching in most medical schools with a dedicated PoCUS course. In comparison to the medical schools currently offering a PoCUS curriculum, the medical schools that intend to introduce it seem to favor instructors with a specialty in emergency medicine. This is perhaps because this specialty is still quite new in some European countries. Indeed, a young specialty may have fewer people involved in university teaching now than in the future. By contrast, the number of instructors trained in family medicine falls drastically (Table 2). The low response rate for course content did not reveal any other significant differences between current and future courses. Nevertheless, the subjects represented are in line with those covered by the expert recommendations [10].

Conclusion

Our survey shows many countries in the EU have at least one medical school teaching PoCUS or willing to teach PoCUS in the near future. It is essential to define PoCUS education before its widespread dissemination in order to structure and standardize PoCUS education in medical schools in the EU. A recent international consensus conference on PoCUS undergraduate education helped to define the ideal curriculum along with the European Federation of Societies for Ultrasound in Medicine and Biology statement from 2016. It is now crucial to evaluate the feasibility and impact of PoCUS teaching on clinical practice by encouraging the medical schools that intend to develop this curriculum to implement validated tools to objectively assess their programs and students.