Research Supports Need for On-Line Training in CPR
Social science research supports the shift from purely aural and written to an environment that includes visual presentation of information, via pictures or videos. Studies show that learning and retention are significantly better if information is communicated visually, in addition to verbally (1,2). In fact, some studies confirm that if information is presented through multiple "channels" - aural, written, and visual - understanding and memory are substantially improved (3). It has been suggested by educational research data that the learning process itself is realized through the interaction between visual, actional, and linguistic communication (i.e. learning is multimodal) and involves the transformation of information across different communicative systems (modes), e.g. from speech to image (1). Studies also show that a learning environment that affords the learner choice of modalities and control over the sequence and tempo at which they are processed, is an optimal learning environment (3). This environment takes into account different learning preferences and styles, and varying needs to accomplish memorization of facts and sequences of information. The neurophysiology of memory supports the multimodal approach to learning, and the common practice of repetition to enhance memory (4). An independent multimodal learning environment such as on-line training affords the learner all of the above.
The above findings can be applied to the field of CPR instruction. While tradition has dictated that Cardiopulmonary Resuscitation (CPR) skills be taught in a 4-6 hour classroom format with an instructor present, little evaluative work has been performed on this training method. The small number of studies that have been performed to measure effectiveness of the large scale programs authorized by the American Heart Association (AHA) and the American Red Cross (ARC) have raised concerns about the effectiveness of this traditional training format, in the areas of skill acquisition and skill retention.
Successful skill mastery in traditional "hands on" CPR classes designed by the ARC and the AHA was studied by two emergency care professionals in 1998 (5). Half of the subjects performed 2% or fewer compressions correctly and half performed 10% or fewer of ventilations correctly. Additionally, 65% failed to achieve a compression rate of 80-100/minute. The results are unsettling, and point to the need for training method improvement through the application of current learning theories.
Two related studies were conducted by a group of reputable scientists in the Division of Emergency Medicine at Emory University School of Medicine in Atlanta, Georgia. The studies were designed to test the hypothesis that video instruction is comparable in training outcome (skill acquisition) to traditional classroom CPR instruction. The two pieces of research, very similar in design, were performed on different subject groups; incoming freshman medical students (6) and church attendees (7). The same conclusion was reached: a 34 minute video instruction was at least if not more than effective in training outcome than a 4-6 hour American Heart Association class led by a certified instructor.It can be concluded that well designed video instruction (or an equivalent on-line training) provides a simple, quick, consistent, and inexpensive alternative to traditional CPR instruction, and may make CPR instruction available to greater populations.
Studies have also been conducted to study the important issue of skill retention. One study on retention found maximum skill deterioration occurred within the first year, yet trainees re-tested at 13-14 months did not perform better than those re-tested later (8). The study suggests that review optimally would be made available well within the first year after initial training.
Another study was conducted to assess duration and quality of CPR skill retention in trainees at the BBC (9). Eighty-seven percent (243 subjects) performed CPR ineffectively, and, of these, 45% were classified as potentially injurious (9). This study suggests that some form of regular retraining or thorough review is essential as early as 6 months post training in maintaining adequate CPR skills.
We may infer from the above results that a new model of training is required to improve skill acquisition and retention. This model would include increased effectiveness and accessibility to training via CD-Rom or on-line training programs, and regular review of skills every 3 to 6 months made possible with the easy access nature of these programs. Social science research and current learning theory supports this direction of training. The Emergency University training program brings these research-supported innovations to the field of pre-hospital emergency care training. When these changes are implemented on a large scale, we can expect to see improved skill retention, trainee confidences, and competent performance of critical life saving skills in the area of pre-hospital emergency care.
Bibliography
Jewitt C, Kress G, Ogborn J, et al (2001): Exploring learning through visual, actional, and linquistic communication: The multimodal environment of a science classroom. Educaitonal Review Vol 53:1:5-18. (This paper explores the "full repertoire of meaning-making resources" available in a classroom. It describes how a group of students transformed a multimodal approach to a science experiment demonstration into their own learning. This paper discusses actional, linguistic, and visual resources, and also discusses the use of analogy as a learning tool. The conclusion of this paper is that "learning can no longer usefully be considered a purely linguistic accomplishment.")
Braslow A, Brennan RT, Newman MM, et al: CPR training without an instructor: Development and evaluation of a video self-instructional system for effective performance and cardiopulmonary resuscitation. Resuscitation 1997; 34:207-220. (The first 18 minutes of the 34-minute video teaches ventilation and chest compression techniques. The last 12 minutes of the video describe indications for CPR, initial assessment of cardiac arrest, phoning for emergency help, lowering the victim to the floor to perform CPR, assessment of breath and pulse, clearing the airway of emesis, and recognition of a heart attack in a conscious person. Students are encouraged to practice their CPR skills as the tape runs. They do not receive educational materials to take home.)
Plass J, Chun D, Mayer RE, et al (1998): Supporting visual and verbal learning preferences in a second-language multimedia-learning environment. Journal of Educational Psychology Vol 90:1:25-35. (English speaking college students studying German were tested on new vocabulary encountered in the context of a story read in German. For key words students were given a choice to see a translation in English (i.e. verbal annotation) or view a picture or video clip representing the word (i.e. visual annotation), or both. Students remembered word translation better when they had selected both visual and verbal annotations rather than one; students comprehended the story better when they had the opportunity to receive their preferred mode of annotation.)
Umphred, D.A. (1995). Classification of treatment techniques based on primary input systems: Inherent and contrived feedback loop systems and their potential influence on altering a feed forward motor system. In Umphred, D.A. (Ed.), Neurological Rehabilitation (3rd ed.), (p. 118-178). St. Louis: Mosby. (Learning and memory are complex processes affected by learning preference, modality of the information presented, emotional state of the learner, and attitudes or affective relationship to the material/topic presented. Elements of memory, encoding and retrieval of information can be augmented by a multimodal approach to teaching, as memory traces are pulled then from several cortical areas. The reverberating circuits involved in laying down memory traces are supported and maximized by repetition when learning.)
Braslow A, Brennan RT. Skill mastery in public CPR classes. Am J Emerg Med 1998; 16:653-657. (The subjects numbered 226 and were enrolled in 30 CPR classes open to the public. The evaluators were ARC and AHA instructors who were not involved in teaching the courses in the study. The measurement instruments were a 14- item checklist, a 5- point competency rating, and an instrumented manikin to assess compressions and ventilations. Fifty percent of subjects performed 2% or fewer compressions correctly (most common error was insufficient depth), and 50% performed 10% or fewer ventilations correctly (most common error was insufficient volume). Sixty-five percent failed to achieve a compression rate of 80-100/minute. Forty-five percent of the subjects failed to open the airway prior to a breath check, 50% failed to adequately assess breathing, and 53% did not perform an adequate pulse check (using the carotid check). Nearly half of all subjects made at least 4 errors in assessment and sequencing of skills).
Todd KH, Braslow A, Brennan RT, et al: Randomized, controlled trial of video self instruction versus traditional CPR training. Ann Emerg Med March 1998; 31:364-369. (The total number of subjects was eighty-seven, and the subjects were randomly assigned to one of two groups. The experimental group viewed a 34-minute video in groups of 1 or 2 and received an inexpensive Family Trainer manikin with which to practice while viewing the video. No other training was made available to this group. The control group was given a traditional AHA Heartsaver CPR course. Skill acquisition was measured by blinded observers. The primary measurement instrument was a global competency assessment of the actual performance of CPR skills, rated on an ordinal scale 1-5 (1, not competent to 5, outstanding). Secondary measures of outcome were performance of (14) skill components of CPR, quality of compressions and ventilations (measured by an instrumented manikin), and CPR-related cognitive knowledge (derived from AHA tests) and attitudes about performing CPR. The global performance measurement indicated that the video self-instruction (VSI) group attained a median score of 3 (competent) versus a median score of 2 (questionably competence) attained by the traditionally trained group. Forty-three percent of the traditional trainees were judged not competent in performing CPR, compared with only 19% of the VSI trainees. In 11 of the 14 individual skills, VSI trainees performed comparably or better than the traditional trainees. For two of the skills, opening the airway after the first set of compressions and between subsequent sets, VSI trainees displayed markedly superior performance.)
Todd KH, Heron SL, Thompson M, et al: Simple CPR: A randomized, controlled trial of video self-instructional cardiopulmonary resuscitation in an African American church congregation. Ann Emerg Med Dec 1999;34:6:730-737. (One hundred seven subjects completed the research. Subjects were randomly assigned to receive either video instruction or an AHA Heartsaver course. Two months after training, blinded evaluators assessed skills in a simulated cardiac arrest setting. In spite of the much shorter time required for training (34 minutes versus 4 hours), the VSI trainees demonstrated similar competency to the traditional trainees in global performance of CPR, as both groups achieved a median rating o f2 (questionably competent); however, the mean score was 2.3 for the VSI group and 1.9 for the traditional trainees. Additionally, 40% of the VSI trainees were judged competent or better in performing CPR, compared with only 16% of the traditional trainees.)
Wilson E, Brooks B, Tweed WA. CPR skills retention of lay basic rescuers. Ann Emerg Med Aug 1983; 12:8:482-484. (The study was conducted on 950 telephone company personnel who were trained in an 8 hour class and tested on instrumented manikins. A random group of 40 was retested at varying intervals of time after the initial training, with the span of time between 11 and 30 months. While all of the subjects were able to perform at least 3 adequate ventilations and 15 adequate compressions immediately after the initial training, only 40% were able to perform these skills adequately during the retest. Additionally, trainees retested at 13-14 months did not perform better than those tested later.)
C.L. Morgan, P.D. Donnelly, C.A. Lester, D. H. Assar. Effectiveness of the BBC's 999 training road shows on cardiopulmonary resuscitation: video performance of cohort of unforewarned participants at home six months afterwards. British Medical Journal 1996 313: : 912-6. P
Effectiveness of the BBC's 999 training road shows on cardiopulmonary resuscitation: video performance of cohort of unforewarned participants at home six months afterwards. (The research design included cold calling on a sampling of trainees in their homes six months after training. The subjects were instructed to read a hypothetical scenario and perform CPR on an instrumented manikin, and the European Resuscitation Council's guidelines provided test criteria. Eighty-seven percent (243 subjects) performed CPR ineffectively, and, of these, 45% were classified as potentially injurious.)