Pattern characteristics of type A influenza in Traditional Chinese Medicine*
2015, 38 (10):
Objective To analyze the pattern characteristics of the type A Influenza in Beijing area.Methods Patients who were diagnosed with Type A Influenza and received treatment in Dongfang hospital, Beijing University of Chinese medicine were included into our research. First, all the included patients answered a TCM questionnaire to gather their basic data and symptoms. Then, patterns of all participants were differentiated according to ying, wei, qi and blood diagnostic principles. Results Of 151 cases with confirmed type A Influenza, 149 cases (98.7%) were identified as exogenous wind-heat patterns while only 2 cases (1.3%) were of exogenous wind-cold patterns. Of the wind-heat patterns, 37 cases (24.5%) were further differentiated as wind-heat with dampness pattern. Wei level pattern was found in 136 cases (90.1%). Qi level pattern was present in 91 cases (60.3%). Wei-Qi level pattern occurred in 78 cases (51.7%). Single Wei level pattern occurred in 59 cases (39.1%). Single Qi level pattern occurred in 14 cases (9.3%). Among the Qi level pattern, 52 cases were yangming heat pattern (34.4%), 40 cases (26.5%) were the shaoyang pattern , 30 cases (19.9%) were the excessive lung-heat pattern, 28 cases (18.5%)were the dampness-heat obstructing middle energizer pattern, and 10 cases (6.6%) were the pattern of heat in the chest and diaphragm. There were significant differences between the constituent ratios of the Qi level patterns (X2=9.73,P=0.02), and single Wei level pattern, of different durations (X2=8.78,P=0.03). The longer the duration was, the higher the proportion of the Qi pattern was accounted for, and the lower the proportion of single Wei level pattern, the lower its occurrence was. However, no significant differences were observed among the distribution of patterns between season, age or its past disease history (P＞0.05). Conclusion Duration of disease is an important factor which could affect the pattern distribution of type A influenza. In Beijing, the patterns of type A influenza are mostly externally contracted wind-heat pathogens, second by wind-heat with dampness. The most common pattern is the Wei-Qi pattern, followed by the single Wei level pattern, while the single Qi level pattern is very rare.
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