This study aimed to improve nursing students’ ability to care for critically ill patients through ECMO nursing VR learning in the pandemic situation resulting from infectious diseases such as COVID-19. The implications for the program’s effectiveness are as follows:
First, the hypothesis that "There would be differences in the knowledge of ECMO nursing between the intervention group applying the ECMO nursing VR simulation program and the control group" was rejected. This result is similar to the study [29] in which four hospitals in the United States applied a screen-based pediatric ECMO simulation training program to medical professionals. Regarding the knowledge of mechanical ventilation nursing in the intervention group, which applied the mechanical ventilation nursing simulation program using VR in South Korea, and the control group, there was no significant difference in the interaction effect between the group and the time point [30]. However, the results were inconsistent in a study [31] in Taiwan that showed that the experimental group had higher knowledge than the control group after providing nursing students with educational materials related to chemotherapy administration using VR. As such, the effect on knowledge is not consistent in relation to simulation practice. It seems that the subjects tended to consider VR simulations as an opportunity to apply and combine existing knowledge rather than increase their knowledge by operating it for a long time because VR simulations with goggles have various difficulties in using the device. It was speculated that there was no significant difference, as this study also measured the basic knowledge of ECMO related to the scenario rather than a newly learned specific one. As simulation-based education is based on an integrated use of knowledge while participating in the process of solving problems in a given situation, it seems that there should be a limitation in measuring the effectiveness of education by measuring knowledge through simple questions. In addition, the knowledge measurement tool in this study was intended to simply measure if the subjects had correct or wrong knowledge, which might be unable to detect significant differences in the knowledge level between the experimental and the control groups. Several previous studies that trained medical staff on ECMO simulation and evaluated their performance have shown the effects on performance [13–15, 17]. Thus, future studies should verify the effectiveness of the ECMO nursing VR simulation program using tools evaluating empirical knowledge and nursing performance skills.
Second, the hypothesis, "There would be differences in ECMO nursing-related confidence between the intervention group applying the ECMO nursing VR simulation program and the control group" was rejected. This result was similar to the study [29] that applied the screen-based pediatric ECMO simulation training program, in which there was no statistically significant difference in self-efficacy. A study [32] that developed High-fidelity Extracorporeal Membrane Oxygenation Simulation in the UK reported that ECMO simulation allowed students to learn skills in an interactive environment without harming real patients, while giving them confidence. However, when analyzing the confidence score data in this study, the mean confidence of the experimental group increased from 6.30 in the prescore to 13.61, while the control group’s confidence increased from 6.94 to 12.61, which was not statistically significant though the difference in confidence increase in the experimental group appeared to be greater than that of the control group. These results suggest that, since ECMO is a difficult topic to understand in a short time period [33], it would be difficult to improve confidence with a single training as shown in this study. However, the ECMO VR simulation training developed in this study can be considered as a way to improve students’ confidence in that it allows for the safe and planned implementation of ECMO-related training [32]. It should be further studied to evaluate the improvement of confidence again through the iterative applications of the program in the future.
Third, the hypothesis that "There would be differences in ECMO nursing-related clinical reasoning capacity between the intervention group applying the ECMO nursing VR simulation program and the control group" was rejected. This was contrary to the results of a study in South Korea, in which a simulation program using VR for nursing students was effective in clinical reasoning capabilities [30]. Clinical reasoning capability is a thought process for gathering and analyzing patient information, assessing the importance of analyzed information, and determining alternative behaviors [34]. Since simulation-based training is expected to enhance clinical reasoning capability in that it provides an opportunity for nursing students and nurses to develop and maintain technical proficiency in high-risk, rare events without the fear of harming the patients [32]. Nonetheless, clinical reasoning capability does not improve in a short period, which seems to be the reason why there was no significant difference between the experimental and control groups. However, previous studies [35, 36] suggested that a program to educate medical staff using various simulation methods on all aspects related to ECMO is needed to improve the ability of medical staff to treat patients with ECMO. Likewise, if nursing students repetitively practiced various clinical situations using the ECMO nursing VR simulation program developed in this study, it would help them improve their clinical reasoning capacity.
Fourth, the hypothesis that “There would be differences in learning immersion between the intervention group applying the ECMO nursing VR simulation program and the control group” was accepted, which is consistent with the results of the study [37] that the motivation to learn increased after applying the education program using VR. Due to the current COVID-19 pandemic, the demand for ECMO is unprecedented and its management is highly complex; however, nursing students have found it difficult to acquire the relevant skills [38]. The ECMO nursing VR simulation program developed in this study extends from traditional instructor-led learning methods to real-world clinical experiences that are rarely encountered, and we believe such experiences can be an effective way to improve nursing students’ learning immersion. In particular, the VR in this study used an HMD to seal the user’s audiovisual and other senses and used visual elements in the ICU and auditory elements such as the patient’s breathing sound and alarm, making the users feel as if they were in real virtual reality, which could ensure students’ learning immersion. Therefore, the provision of various teaching methods, including VR teaching methods, to help nursing students in their education, and to find ways to improve their immersion in learning are necessary.
Fifth, the hypothesis that “There would be differences in learning satisfaction between the intervention group applying the ECMO nursing VR simulation program and the control group” was accepted. This is consistent with the study results [30], in which the experimental group had higher learning satisfaction than the control group in the mechanically ventilated nursing VR simulation program performed for nursing students in South Korea [30], and the HFS ECMO nursing training program for ICU nurses in France resulted in satisfaction from 95.2% of participants [19]. This is because the educational program developed in this study considered the learning needs of the subjects, and tried to maximize the educational element by realistically implementing scenarios and clinical situations with clinical and educational validity in VR. In addition, this result seemed to be due to the characteristics of the learning method, because the immersive VR simulation uses digital devices to learn in a situation completely different from reality, making it highly immersive and distinct from reality, which might have induced the learning interest and confidence enhancement in students [39]. High satisfaction with simulation education can improve learners’ internal motivation and, consequently, clinical performance [40]; thus, the program developed in this study is expected to be able to enhance students’ competence.