| Summary: | 碩士 === 國立成功大學 === 護理學系碩博士班 === 93 === The purpose of this study was to investigate the effects of breathing relaxation therapy for patients with cardiac surgery. The relationship between the degrees of pain and heart rate variability were also examined. The design of this study was crossover design with purposive sampling. Fifteen participants with cardiac surgeries were invited to participate. Participants entered into the sequence of experimental and control period, or control and experimental period randomly.
The outcome indicators included the degrees of pain and heart rate variability. The degrees of pain were measured by visual analogue scale (VAS). The heart rate variability was measured by Biocom Heart Rhythm Scanner. The indexes included the standard deviation of the normal-to-normal interval (SDNN), total power (TP), low frequency power (LF), and high frequency power (HF).
The data was analyzed by paired t test and Wilcoxon Signed Ranks test to compare pain levels and hart rate variability during six times each in experimental period and control period. Generalized estimating equation (GEE) was using to examine if the time would be a factor influencing the degrees of pain and heart rate variability. Finally, Kendall tests were used to examine the correlations on the degrees of pain and heart rate variability.
The results of this study showed that the differences on the degrees of pain before and after the experimental period and control period were statistically significant (p < .05), except on the second time (p > .05). During six times of repeated measurement period using the GEE approach, β1 coefficient examined periodical variations, β2 coefficient examined the effect of the breathing relaxation technique along the time frame, both coefficients weren’t statistically significant (p > .05). β 3 estimation coefficient examined the interaction between the main effect and time, there were significant differences on indicators of degrees of pain, and HF (p < .05). However, there was no interaction between the main effect and time on the SDNN, LF, and TP. The degrees of pain in 5th time of breathing relaxation therapy had significantly positive correlation with HF (r ＝ 0.36, p < .05), and had significant negative correlation with TP (r = -0.40, p < 0.05).
This study provided information on the use of breathing relaxation technique for patients with cardiac surgery. This technique was proved to be effected on the reduction of the degrees of pain and stimulated the activities of parasympathetic nerve. The breathing relaxation exercise can be applied in the clinical setting with prudent implementation steps.
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