Study: A Half-Hour Just as Good as Half-Day for CPR-AED Training

UT Southwestern Medical Center researchers have found that a user-friendly, 30-minute, video-based cardiopulmonary resuscitation training session is just as effective as the traditional three- to four-hour course in teaching basic life-saving techniques to laypersons. In addition, at six months after the training--a critical point for CPR skill retention--those who took the shorter course performed CPR and used an automated external defibrillator (AED) just as well or better than those who take the traditional training.

These findings, published in the August issue of the journal Resuscitation, are the first to evaluate and document the effectiveness of long-term retention of the new 30-minute CPR-AED training. Traditional CPR courses last half a day, as six to eight people take turns practicing their skills on a shared manikin. The remainder of the time is spent listening to instruction, leaving little time for skills practice, the researchers report.

The shorter course is much more convenient and easily accessible, said Dr. Lynn Roppolo, assistant professor of emergency medicine and lead author of the study. "Individuals practice while they learn, allowing more time to perform and retain the critical hands-on skills required to provide more effective CPR," Roppolo said. "All of these factors will likely translate into more people knowing what to do--and doing it right--whenever CPR is needed. As a result, hopefully, many more lives will be saved in years to come."

For the study, volunteers recruited in Fort Worth were selected randomly to take either the 30-minute course or a traditional three-hour session. The short course consisted of a 23-minute digital video disc program, developed by the American Heart Association, which covers basic adult CPR skills, including recognition of signs of life, calling for help, opening the airway, rescue breaths, and chest compressions.

In the traditional course, students attended a three-hour session consisting of lectures supplemented by related video-based instruction, practice of basic CPR skills, choking procedures, and instruction and hands-on practice in the use of an AED. During this course, there was one certified instructor for every six to eight students during the skills practice.

After their respective training, the students from both groups were tested using a life-sized manikin, which was connected to a laptop computer that objectively measured parameters such as the rate and depth of ventilations and chest compressions. In addition to the computer measurements, overall CPR performance and AED use were videotaped and later judged as being appropriate by CPR training experts, who graded each study participant without knowing whether he or she had taken the half-hour course or the traditional training.

Immediately after taking the class, there were no significant differences in CPR performance between the students who took the three-hour course as compared to those who took the 30-minute course. After six months, however, trainees who took the 30-minute course called 9-1-1 and provided adequate ventilation more frequently than those who took the longer course. Also, both at the initial and six-month follow-up test, the students who took the traditional course took 30 percent longer to assess for signs of life, and they took significantly more time to pause between chest compressions to perform ventilations. In grading AED use immediately after the courses, the trainees who took the 30-minute course placed the AED pads and delivered a shock correctly in 98 percent of the cases, compared to 92 percent of those who took the longer course. Moreover, at the critical six-month follow-up, 93 percent of those in the half-hour course still operated the AED well and 93 percent were still judged to be performing chest compressions adequately.

"The results of this investigation were very compelling. This study suggests that hands-on practice is not necessary to learn how to operate an AED, a device that directly provides the rescuer with vocal instructions once it is turned on," said Roppolo. "Thus, training tools that utilize cognitive modes, such as the Internet and DVD demonstrations, may be just as effective." The research was supported by the American Heart Association, the Laerdal Medical Corp., Phillips Medical Systems, and American Airlines.

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