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Using simulation to explore the impact of device design on the learning and performance of peripheral intravenous cannulation
Advances in Simulation volume 4, Article number: 27 (2019)
Abstract
Background
The design of medical devices impacts upon the performance of healthcare professionals and patient safety. However, multiple devices serving the same function are often available. The purpose of this study was to use simulation as a means of examining the impact of differences in device design on (1) learning of, or attainment of behavioral fluency in, peripheral intravenous cannulation (PIVC); and (2) the generalization, or transfer, of learning on one device to performance of PIVC using an untrained device.
Methods
A total of 25 final cycle medical students participated in this study which used a randomized two-group design. Participants were randomly assigned to learn PIVC using either a closed PIVC device (a single device which consists of an intravenous cannula with a pre-attached extension tube; n = 14) or an open PIVC device (a two-piece device made up of an intravenous cannula and a separate extension tube which is attached following insertion of the cannula; n = 11). Task analyses were developed for the performance of PIVC using each device. Subsequently, simulation-based fluency training was delivered to both groups using their assigned PIVC device, and continued for each participant until the fluency criterion was achieved. Following achievement of fluency, participants were asked to perform PIVC using the untrained device (i.e., the PIVC device that they had not been trained on).
Results
All participants in both groups met the fluency criterion, and no significant differences were observed in the number of trials or total training required by groups to achieve fluency. Participants in both groups improved significantly from baseline (M = 11.69) to final training trial (M = 100). However, a significant decrement in performance (M = 81.5) was observed when participants were required to perform PIVC using the untrained device.
Conclusions
Participants achieved fluency in PIVC regardless of the device used. However, significant decrements in performance were observed when participants were required to perform PIVC using a novel device. This finding supports the need for careful consideration of devices purchased and supplied in the clinical setting, and the need for training prior to the introduction of novel devices or for new staff members.
Background
It is well recognized that the design of equipment and medical devices impacts upon the performance of healthcare professionals and the safety of patients [1,2,3]. Errors can arise for a variety of reasons including poor engagement between those designing medical devices and those who must use these in practice, insufficient training in the use of devices, device failure, user error, inappropriate use or applications of a device, or inadequate device servicing or maintenance [1, 4,5,6].
The safe use of medical devices by healthcare professionals is also compromised by the diversity of devices available in the clinical environment which serve the same function [7, 8]. For instance, it is common for hospital trusts in the UK to have more than 30 different infusion pump devices [7]. Similarly, substantial variance in the design of resuscitation equipment has also been observed in UK hospitals [9]. This variety of devices creates a considerable opportunity for errors, and patient harm [8]. Healthcare professionals who work across various locations, or are new to an organization, may fail to identify or recognize crucial differences in device design [5] which can negatively impact on technique and performance.
While consistency and standardization is recognized as an important means of ensuring the safe usage of medical devices and equipment [2, 8, 10], little research has examined the impact of differences in device design on procedural skill learning or the accuracy of performance of a particular procedural skill using a novel device. The use of simulation is one means of assessing the use, or adequacy, of equipment and devices in order to inform appropriate training or education initiatives [11,12,13].
The purpose of this study was to examine the impact of differences in device design on (1) learning, or attainment of behavioral fluency in, a targeted procedural skill; and (2) generalization, or transfer, of learning on one device to performance of the same skill using an untrained device. Of key interest was the quantification of any difference in performance during the assessment of generalization of learning to a novel device, and the examination of the nature of any errors that were found to occur during this process.
In order to address these research questions, we enrolled final cycle medical students into a research study that involved the delivery of fluency training in peripheral intravenous cannulation (PIVC), also referred to as peripheral intravenous catheterization. Fluency training has been demonstrated previously to be effective in teaching core procedural skills at undergraduate and postgraduate medical levels [14, 15]. Peripheral intravenous cannulas are the most commonly used invasive medical device in hospital settings [16], and are used for therapeutic purposes such as administration of medications, fluids, and/or blood products as well as blood sampling. Potential complications associated with their use include phlebitis or thrombophlebitis, bloodstream infections, and infections at the site [16]. Appropriate PIVC technique is crucial for reducing the frequency of complications [17, 18], yet disparities in PIVC-related training have been reported [18]. In the Irish health service, multiple different PIVC devices are available for use across hospitals and within hospital groups across which physicians may work [19]. For the purpose of this study, we identified two of the most commonly used devices and explored the impact of device design on attainment of fluency and generalization of learning to performance using an untrained PIVC device.
Method
Experimental design and setting
This study used a randomized two-group design. Fourth-year medical students were randomly assigned to complete the simulation-based fluency training using one of two different PIVC devices available for use in Irish hospitals. Within-subject analysis was used to monitor the performance of participants in both groups throughout the intervention as they worked to achieve fluency. An overview of the different phases of the study is provided in Fig. 1.
All phases of the study were carried out in the National University of Ireland Galway’s simulation laboratory.
Ethical approval
Ethical approval was obtained from the National University of Ireland Galway’s Research Ethics Committee (Ref: 17-Sep-15).
Participants
Convenience sampling [20] was used to recruit 27 fourth-year medical students who were subsequently randomly assigned to complete simulation-based fluency training using either the closed PIVC device or the open PIVC device. Simple randomization was employed [21], and achieved by having participants draw a small piece of paper from a hat that contained multiple pieces of paper in two different colors. Group assignment was then based on the color of the paper each participant had drawn. All participants had received previous training within the medical school on venipuncture, but had not received prior training on PIVC.
Materials
Simulator
The ‘Limbs and Things’ ante-cubital fossa (ACF Pad Venipuncture Simulator, Limbs and Things, Bristol, UK) pad was used to simulate the vessels contained within the antecubital fossa of the arm and/or dorsum of the hand. This pad was attached to the non-dominant arm of the assessor to allow for a tourniquet to be applied during performance of PIVC, and was connected to a fluid bag containing mock blood to simulate blood flow (Mock Blood Giving Set, Limbs and Things, Bristol, UK).
Consumables
Consumables provided for the performance of PIVC using each of the two devices are presented in the corresponding task analyses (see Additional file 1: Closed PIVC device task analysis and Additional file 2: Open PIVC device task analysis). The consumables used were the same as those typically made available for performing PIVC within Irish hospitals. The primary difference between consumables for the two groups was the type of PIVC device used, either (1) a closed PIVC device or (2) an open PIVC device. Other variability was deliberately constrained by ensuring needles were of the same gauge and extensions sets had the same number of ports.
Closed PIVC device
A closed PIVC device is a single device which consists of an intravenous cannula with a pre-attached extension tube [22]. The closed PIVC device used in this study was BD Nexiva Closed IV Catheter System with Single Port.
Open PIVC device
An open PIVC device is made up of two component parts: an intravenous cannula which is inserted into the vein using a trocar technique and an extension tube which is attached to the inserted cannula following removal of the stylet [23]. The two components of the open device used in this study were the B. Braun Introcan Safety IV Catheter and BD Neutraclear 1-Way Extension Tubing.
Procedure
Preparatory phase
There were three stages to the preparatory phase.
Development of the task analysis
The target behavior in this study was PIVC. Task analyses were developed for the performance of PIVC on both the closed and open device (see Additional file 1: Closed PIVC device task analysis and Additional file 2: Open PIVC device task analysis, respectively). These task analyses were developed in accordance with best practice and convention within applied behavior analysis (a scientific discipline concerned with changing socially significant behavior through the consideration of empirically established principles of behavior [24]) for developing task analyses [25, 26]. This process involves identifying all of the distinct behaviors that comprise completion of a ‘task’ appropriately and determining their sequence [26]. Subsequently, each distinct behavior, or task analysis step, is operationally defined to specify the physical movements involved in, and materials required for, correctly completing that step [27]. This careful and clear definition of each step is essential for ensuring accurate and reliable recording of the behavior. In order to ensure the validity of the task analyses, these were developed following a review of extant teaching materials, hospital guidelines, and manufacturer recommendations. Each step in the task analyses was operationally defined and specified both the physical movements and materials involved [14].
The initial task analyses were reviewed and refined by two subject matter experts; a clinical nurse specialist, who had over 25 years of experience in teaching PIVC and venipuncture, and a hematology nurse working as a clinical consultant with 8 years of experience. The revised task analyses were further reviewed for face validity by other healthcare educators and senior doctors (n = 3), by psychologists with expertise in the development of task analyses and operationalization of behavior (n = 2), and by lay-persons (n = 3) to ensure the instructions and language used were clear and accessible.
Establishment of the fluency criterion
The fluency criterion is a benchmark representing expert, or fluent, performance that learners work to achieve during training. The fluency criterion for performance of the target behavior using each PIVC device was determined separately, in both instances by having an expert perform the behavior with complete accuracy on three occasions and using the median duration of these performances to establish an appropriate fluency criterion. Within the subsequent fluency training, participants were required to complete the task with 100% accuracy on two successive trials, and without exceeding the expert’s median duration by more than 10%, in order to be deemed fluent. The criterion rate was set at 5 min, 14 s for the closed PIVC device and 5 min, 5 s for the open PIVC device.
Preparation for assessment
Data recording sheets were developed that allowed observers to document both the percentage accuracy and duration associated with participants’ performance of PIVC for each trial. The role of the observers was to formally assess participants’ performances for the purposes of research data collection and to support peer assessors (i.e., a participant in the study who observed another participant perform the target behavior, assessed their performance, and provided corrective feedback using the task analysis as a guide) in the delivery of specific corrective feedback following performances. Observers (n = 5) were trained in the appropriate assessment of the accuracy and duration of PIVC performance prior to beginning data collection. Videos of trials showing performances of 100% accuracy within time-frame were developed to show the break-down of steps and ensure assessors were familiar with both the task itself and the recording of data before trials began. Observers were allowed multiple attempts to practice trials using both PIVC devices, document the performance of others using recording sheets, and to give and receive corrective feedback. The marking of recording sheets during training was reviewed by the lead researcher (BRM) in order to ensure each observer’s data were accurate and corrective feedback was provided where necessary.
Intervention and evaluation phase
There were three stages to the intervention phase.
Assessment of baseline performance
Following random assignment, participants were asked to carry out PIVC ‘to the best of their ability’ using their assigned device (i.e., either open or closed). Participants were first habituated to the simulator and were given the opportunity to inspect the device and other materials provided, as per best practice in healthcare simulation research [28]. Observers gave no further instruction on how to use any of the consumables provided. Participants were informed that the accuracy and speed of their performance would be assessed by an observer. For each trial in the baseline and later phases of the intervention, the observer indicated when they were starting the timer, at a time when the participant was comfortably situated at the desk but had engaged in no physical movements related to the performance of PIVC. The timer was stopped when the participant had performed the final step of the related task analysis or indicated verbally that they were finished. Upon completion of the baseline trial, participants were given the task analysis for their assigned device but were not provided with corrective feedback.
Fluency training
In this stage, participants attended a series of training sessions at the simulation laboratory. During the first training session, participants were assigned to groups of two to three and it was explained that during each trial (defined as one performance of the behavior using the simulator), one participant would act as the ‘learner’ and the other participants would act as the ‘peer assessors,’ using the recording sheet, and that participants would subsequently take turns in each role. It was explained that the goal was to practice until they had achieved behavioral fluency (defined as 100% accuracy across two consecutive trials within the criterion rate for their assigned device—5 min, 14 s for the closed PIVC device and 5 min, 5 s for the open PIVC device).
Following each learning trial, the peer assessors provided corrective feedback using the task analyses and recording sheet on the accuracy of the trial. A trained observer was also stationed with each group and provided input and support for any additional or uncertain elements following the initial peer feedback. The opportunity to practice incorrect steps was provided at the end of each trial. One physician was present at every training session to answer any technical and/or clinical questions that arose.
Throughout the intervention phase, standard celeration charts (SCCs), produced using Chartlytics© software, were used to graph and monitor the progress of each participant and identify any potential need for additional or modified training methods. SCCs are a core element of precision teaching, an educational framework often used alongside fluency training [27, 29]. SCCs depict the frequency of a target behavior and are widely used by researchers or educators to facilitate determination of whether learning is progressing under current instructional conditions or whether a change in, or additional, instructional techniques is required [30]. Participants were shown their individual, up-to-date graph at the beginning of each training session. For each participant, training continued until they had achieved the fluency criterion.
Assessment of generalization of learning to untrained device
In order to assess the generalization, or transfer, of the target behavior to an untrained PIVC device, participants from both groups were asked to perform PIVC to the best of their ability using the PIVC device that was not used during their fluency training (i.e., participants who had learned to perform PIVC using the open device were now assessed on their performance using the closed PIVC device and participants who had learned to perform PIVC using the closed device were now assessed on their performance using the open PIVC device), subsequent to achieving fluency. This assessment was conducted in the same manner as baseline testing and the relevant task analysis was not made available to these individuals until the study was completed. The accuracy of participants’ performance, evaluated as per the relevant task analysis, was the focus of this assessment.
Data analysis
SPSS version 24 (Armonk, NY: IBM Corp) was used for data entry and analysis. To examine for any differences in the ease or rapidity of learning PIVC using the closed and open PIVC devices, two independent t tests were used to analyze whether the number of trials to completion or total training time differed by group. To control for this multiple testing, a Bonferroni correction was applied, and alpha was set at .025. In order to further assess for differences in performance among the closed PIVC device and open PIVC device groups, a mixed ANOVA was used to compare the performance of both groups across baseline, final training trial, and the generalization assessment.
Results
Participants
The participants were randomized into two groups. The resulting closed PIVC device group consisted of 14 fourth-year medical students (eight women, six men). Mean age was 22.77 years (SD = 1.24; range 21–25). The open PIVC device group consisted of 13 students. However, two participants in this group withdrew from the study and their data is not reported. Therefore, the final open group consisted of 11 fourth-year medical students (five women, six men). Mean age was 22.36 years (SD = 0.81; range 21–24).
Impact of differences in device design on learning
The closed PIVC device group achieved behavioral fluency in a mean of 9.50 trials (SD = 2.74) and a mean total training time of 57.47 min (SD = 15.26). The open PIVC device group achieved behavioral fluency in a mean of 11 trials (SD = 2.739) and mean total training time was 69.75 min (SD = 18.03). Independent t tests showed that there was no significant difference between the groups on the number of trials taken to reach fluency, t (23) = − 1.36, p = 0.19, or in the total duration of training, t (23) = − 1.84, p = 0.08.
Impact of differences in device design on generalization of learning
The performance of both groups across baseline, final training trial, and generalization to untrained device assessment is depicted in Fig. 2. A mixed ANOVA was used to assess for statistically significant differences in performance between groups and across measurement timepoints. This test revealed no discernible main effect of group, i.e., no significant differences between the performance of the two different device groups, F(1,23) = 1.32, p = .26. Similarly, the test indicated no significant interaction effect, i.e., no significant difference between the performance of the two groups at any of the different measurement timepoints, F(1,23) = .50, p = .49. However, a main effect of measurement timepoint was identified, F(1,23) = 734.10, p < .001, partial η2 = .97 (large effect). Bonferroni-corrected pairwise comparisons were subsequently performed in order to determine where the differences in performance lay. These pair-wise comparisons revealed that accuracy at baseline (M = 11.69) was significantly lower than accuracy at the final training trial (M = 100) and the generalization to novel device trial (M = 81.51), all p’s < 0.001. However, although performance during the generalization phase was significantly higher than performance at baseline (p < 0.001), it was significantly lower than performance at final training trial using the device participants had received training on (p < .001).
No participant in either group performed with complete accuracy on the untrained device. An examination of the errors made by participants during the generalization phase was undertaken. Common errors that occurred during the use of the closed PIVC device were a failure to loosen the safety mechanism (100% of participants), to flush and attach the bung (63.6% of participants), and to operate the pinch clamp (72.7% of participants; steps 4, 12, 13, and 21 within the task analysis; see Additional file 1: Closed PIVC device task analysis). Average accuracy when using the closed PIVC device was 80.3% (range 69–88%, M errors 5.1).
Most commonly, participants using the open PIVC device for the first time made errors relating to flushing the extension tubing during equipment set-up (92.9% of participants), placing gauze underneath the needle insertion point (50% of participants), and flushing the extension tubing once the cannula was secured (50% of participants; steps 12, 17, and 23 within the task analysis; see Additional file 2: Open PIVC device task analysis). Average accuracy when using the open PIVC device was 82.3% (range 56–96%, M errors 4.4).
Discussion
This study used simulation as a means of examining the impact of differences in device design on learning and generalization of learning. No effect of device design was found for acquisition of fluency in a target behavior. However, significant decrements in performance were observed when participants were required to generalize their learning to a PIVC device on which they had not been trained. Errors made when using the untrained PIVC device may increase the likelihood of PIVC-related complications and infections. This finding highlights the need for careful consideration of the devices made available in clinical settings and surrounding the introduction of new devices or staff members in clinical settings.
There was no apparent impact of device design on acquisition of fluency in completing PIVC. Participants in both groups required a mean of 10.2 trials to achieve fluency in the target behavior. These data underscore the necessity of dedicated procedural skills training and the insufficiency of traditional approaches to skills training such as ‘See One, Do One, Teach One’ [31]. Fluency training may offer one means of ensuring effective skill development during medical school. Previous research [14, 15] has also demonstrated the efficacy of fluency training for producing a high level of performance, and learning that is stable (i.e., persists in the presence of distraction) [32], retains (i.e., persists over time following the cessation of training) [32], and generalizes to the clinical setting. The ability of healthcare professionals to perform core procedural skills fluently is likely to positively impact on patient safety [33]. Future research which considers how best to establish fluency or proficiency in core procedural skills within busy medical school curricula would be of much interest.
The performance decrements observed when participants were required to transfer their learning to a novel, untrained PIVC device are of note. Although participants were performing with complete accuracy at the conclusion of training, percentage accuracy deteriorated to a mean of 81.5 (SD = 8.3) when participants were asked to use the PIVC device on which they had not been trained and critical errors were made. Correct performance of PIVC is essential for reducing the frequency of complications [17, 18]. Issues such as not flushing the extension tubing prior to use, not applying gauze to reduce the risk of blood spillage, failing to loosen the safety mechanism on the closed PIVC device, and not closing the pinch clamp on the closed PIVC device could contribute to an increased risk of blood exposure for the healthcare practitioner and of PIVC-related complications for the patient such as phlebitis or thrombophlebitis, bloodstream infections, air embolism and infections at the cannulation site [16].
In addition to the negative impact of poor performance upon patients, uncertainty regarding the appropriate use of a device has been found to cause stress for healthcare providers [10]. These data support the need for simulation-based training upon the introduction of novel devices in the clinical setting or at induction for new staff members [23, 24]. Future research that further explores the impact of device design on performance among varying professional groups would be of use in strengthening the argument or rationale for dedicating resources to ensure all staff, even temporary or agency staff, are proficient in the use of medical devices necessary for the safe and effective performance of core procedural skills.
Limitations
There are a number of limitations to this study that should be acknowledged. First, the lack of formal consideration of sample size in advance of the conduct of the study and reliance on non-random, convenience sampling may be criticized. Second, the inclusion of medical students as participants, rather than experienced healthcare providers, when considering the impact of device design on learning and performance may also be questioned. However, using medical students was considered appropriate as then participants had minimal knowledge of PIVC and little, or no, exposure to the different PIVC devices under examination. Further, previous research on fluency training suggests that post-fluency training, learners perform with higher levels of accuracy as compared to untrained, but more senior, peers who have greater degrees of clinical experience [14, 15]. Third, data relating to the reliability of assessment (i.e., interobserver agreement data) were not collected during the study. It may be noted that observers were performing reliably during training as part the ‘preparation for assessment’ phase. However, data were not collected beyond this phase. Finally, data were not collected regarding the participants’ perceptions of the PIVC devices’ ease of use. Such data have been gathered in previous research and have revealed perceived differences in the ease of use of open and closed PIVC devices [23]. In our study, engagement with participants’ regarding their experiences using the two devices may have elucidated the errors occurring during the generalization phase and informed future training endeavors.
Considerations for future research
A number of considerations for future research may be offered. First, the impact of acquiring fluency in one target behavior on the acquisition of fluency in another target behavior, or the development of fluent performance on an untrained device, should be considered. In the current study, participants required a mean of 10.2 (SD = 2.8) trials to achieve fluency across the two PIVC devices. Future research could explore whether the trials, and training time, taken to produce fluency in the performance of a procedural skill using an untrained device, or in other related trocar skills such as lumbar puncture and intraosseous cannulation, are reduced. Given that the accuracy of performance during the generalization assessment remained significantly higher than performance at baseline, it might be expected that fewer training trials would be required to produce fluency in these instances. However, research which empirically investigates this possibility would be of much interest.
Second, future research could usefully examine whether only the provision of detailed task analyses to the participants, describing the appropriate performance of a procedural skill using a specified device, may be sufficient to produce safe and effective performance of skills using novel devices in the absence of training. Task analyses make the knowledge of an expert, or experts, explicit for a learner [34]. In addition to task analyses’ use for facilitating an instructor’s assessment of performance or learning [35], task analyses make clear for a learner, or novice, what behavior is required or expected in the performance of a particular skill [14]. In the current study, participants completed a mean of 4.72 steps incorrectly during the assessment of generalization. It is possible that the provision of a relevant task analysis, in the absence of further training, might be sufficient to clarify appropriate performance of these steps for participants and improve performance on the novel device. This would constitute a minimally expensive means of ensuring appropriate performance and patient safety. However, research data is first required to elucidate the impact of a task analysis provided in the absence of further training on performance.
Finally, data collected in the current study suggest the need for greater consideration of the devices purchased and supplied in clinical settings and the introduction of novel devices. Previous research has identified that it is common for multiple devices serving the same function to be made available to healthcare providers [7, 9] and that this can negatively impact upon performance [7, 8]. The current study has also demonstrated that performance decrements occur when participants are required to use novel devices on which they have not been trained. There are a substantial number of factors that must be considered during the selection and purchasing of devices including their safety for the patient and likelihood of contributing to positive outcomes, the safety of their use for the healthcare provider, and the cost [23]. However, ease of use by healthcare providers should also be considered [23]. The decrements in performance observed in the current study suggest that the impact of device on performance and a potentially increased occurrence of errors should be acknowledged and contribute to purchasing decisions.
Conclusions
There was no discernible impact of device design on learning of, or the attainment of behavioral fluency in, PIVC. However, device design appeared to have an impact on subsequent performance, and significant decrements in the accuracy of PIVC performance were observed when participants were required to perform PIVC using a commonly available but untrained PIVC device. These data emphasize the need for the careful consideration of the devices that are made available in clinical settings, and for appropriate simulation-based training to be provided upon the introduction of a novel device, or new staff members, into the clinical setting.
Availability of data and materials
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgments
The authors wish to thank the participants for their time and interest in this research study. The authors also wish to thank CentralReach (www.centralreach.com) for the free use of their Chartlytics software.
Funding
Funding for this study was received from Becton Dickinson (Becton Dickinson Penel Limited Irish Branch, Pottery Road, Dun Laoghaire, Co. Dublin). The funders reviewed an initial research proposal and requested updates regarding the progress of the project. The funders also contributed their expertise to the development of the task analyses used in the study and the establishment of the fluency criteria. The funders did not input beyond this on study design, data collection, data analysis, interpretation, and did not review or approve the final manuscript.
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BRM, MB, DB, POC, and SL were involved in the design and the planning of the study. BRM, DB, SL, and POC contributed to the development of the task analyses. BRM, MB, EOD, CW, CM, and SL engaged in data collection for the study. BRM, MB, and SL completed the data entry and analysis. BRM, MB, and SL drafted the initial manuscript while DB, POC, EOD, CW, and CM assisted with redrafting it. All authors reviewed and approved the final manuscript prior to submission.
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Ethical approval for this study was received from the National University of Ireland Galway’s Research Ethics Committee and all participants provided written informed consent.
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Not applicable.
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The authors declare that they have no competing interests.
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Supplementary information
Additional file 1.
Closed PIVC device task analysis.
Additional file 2.
Open PIVC device task analysis.
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Reid-McDermott, B., Browne, M., Byrne, D. et al. Using simulation to explore the impact of device design on the learning and performance of peripheral intravenous cannulation. Adv Simul 4, 27 (2019). https://doi.org/10.1186/s41077-019-0118-5
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DOI: https://doi.org/10.1186/s41077-019-0118-5