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本实验采用了三因素4×2×5析因实验设计,以6名健康男性为被试者,比较了在使用咬嘴及鼻夹(MP+NC)或面罩(MA)条件下,等阻值型联合阻力〔CR(IR=ER)〕负荷2、4、6、8、10min时,呼吸功能的变化。将时间因素的效应视作随机变量,按混合模型对16项呼吸生理变量的数据作4×2×5析因方差分析及相关分析。主要结果:①2～10min期间对呼吸气体流率((?))、口腔压力(P)、呼吸时相时间(T)、潮气量(V_T)、额外呼吸功率((?)等共16项变量的5次采样数据的波动不具显著意义。②在CR(IR=ER)负荷作用下,除引起两相的P、(?)相应升高、(?)降低、T延长以及V_T增加、f减慢变化外;多数情况下还见T_I/T_C随阻值增加,并通过对逐次呼吸T_I/T_C数据的处理得到验证。③使用MA经鼻呼吸条件下,CR(IR-ER)引起的变化除具有与使用MP+NC时基本相同的一面外,还出现由于附加死腔增大以及与呼吸方式有关的反应特点。后者主要表现为在CR阻值较高时,两相P及(?)仍能维持较高水平,(?)、f及T等随阻值降低或延长的程度较使用MP+NC时为轻。使用MA或MP+NC,不影响由类别量表测量呼吸不适感觉之结果。④所涉及的16种呼吸生理变量中,以P、(?)与CR(IR=ER)间的相关关系为最高,在实际工作中可选取P_Imax或口腔(面罩腔)压力波动((?))为客观指标反映CR(IR=ER)的强?
In this study, a three-factor 4 × 2 × 5 factorial experimental design was used. Six healthy male subjects were enrolled in this study. Equal resistance was compared with MP + NC or masks (MA) Value of combined resistance [CR (IR = ER)〕 load 2,4,6,8,10 min, respiratory function changes. The effect of time factor was regarded as random variable. According to the mixed model, the data of 16 respiratory physiological variables were analyzed by 4 × 2 × 5 factorial analysis of variance and correlation analysis. The main results were as follows: (1) A total of 16 variables (respiratory flow rate, oral pressure, respiratory time (T), tidal volume (V_T) and extra respiratory capacity The fluctuation of 5 sampling data is not significant.②In the case of CR (IR = ER) load, except for the two phases causing P, (?) Correspondingly increased, (?) Decreased, T prolonged and V_T increased, In most cases, T_I / T_C also increased with the increase of resistance value, and was verified by the processing of the data of T_I / T_C on a breath-by-breath basis.③The change of CR (IR-ER) Has the same side with the MP + NC, but also appears due to additional dead space increases and breathing patterns related to the reaction characteristics.The latter mainly in the higher CR resistance, the two-phase P and (?) (?), F and T with the resistance to reduce or extend the extent of the lighter than the use of MP + NC use MA or MP + NC, does not affect the measurement of respiratory discomfort by the type of scale feeling Results: Among the 16 kinds of respiratory physiological parameters involved, the correlation between P (?) And CR (IR = ER) was the highest, P_Imax or oral cavity (mask cavity) Force fluctuations ((?)) Objective indicators reflect strong CR (IR = ER) of?