呼吸阻力负荷感觉评量方法的研究

由外加呼吸阻力负有所引起的呼吸感觉被看作一种模糊量。基于模糊集理论的多织估量法及其数据处理公式 f_(ut)=1/t(sum from j=1 to m v_iy_(ij)w_j/sum from j=1 to m y_(ij)w_j),i=1,2,…,n被用来评量呼吸阻力感觉。37名健康男性青年接受了不同负荷时相下的各种外加阻力负荷。所获结果揭示如下事实:每一个给定的阻力负荷均在量表的各类别上存在一个可能性分布;阻力负荷与其感觉量间呈幂函数关系;总阻力值相等,但在不同负荷时相下,其相应感觉量亦不同,其中,以呼气相者为最低。多级估量法评量结果还给出了对应于各感觉类别等级的相应刺激量。而由传统类别量表评量的结果则不能反映负荷时相的影响,并且感觉量与生理刺激量间呈凹向下的函数关系。     

呼吸阻力感觉的辨别阈梯级—一种辨别阈量表

近年来研究人对外加呼吸机械负荷的感觉体验已取得一些重要进展。但对阈上阻力负荷的研究多限于按stevens定律定量描述,而对另一重要的心理物理函数——Fechner定律在本领域的应用问题则未见提及。本实验主要目的在于考察呼吸阻力感觉是否符合Fechner定律,可否由辨别阈量表评量。因此,我们以9名健康男子为对象,测定了自     

Comparison of Breathing Pattern and Subjects'''' Perception during Resistive Loads Applied to Inspiration,Expiration or Whole Breathing Cycle

Using a 2-factor 6×3 factorial experimental design and the MultistageEvaluation Scale(MES)to estimate the respiratory sensation,we systematicallystudied in 17 healthy young men the physiological and psychological effects of sixlevels of suprathreshold added resistive loads,appliedeparately to eitherinspiration or expiration,or throughout the breathing cycle.We observed that(1)no matter what phase of the breathing cycle was impeded,mask cavity pressureswingas well as total external respiratory workrate(r)was a curvilinearfunction of the total resistive load added(R_T),which exhibited an upwardconvexity;(2)the perceived magnitude(PM)of the respiratory sensation estimatedby using MES(S_(MES))was directly related to intensity of the physiologicalstimulus and indirectly related to the intensity of the resistance added;and(3)under different loading conditions,S_(MES)was a curvilinear function of theintensity of the physiological stimulus,which exhibited an upward concavity.These results suggest that when we derive the standards of allowable resistancefor respiratory protective equipment,in addition to the total load intensity,theimportance of the ratio between inspiratory and expiratory resistance should alsobe considered.     

不同时相呼吸阻力负荷生理、心理效应的比较

以17名健康男性青年为对象,采用两因素(总阻力值×阻力负荷时相)6×3析因实验设计,以多级估量量表(MES)评量呼吸感觉量。对不同程度、不同时相的呼吸阻力负荷的生理、心理效应进行了系统的考察与比较。主要结果如下:①在三种负荷时相下,面罩腔压力波动幅度(P)、总外呼吸功率(W_T)与总阻力值(R_T)间均呈凹向下型式函数关系;②呼吸感觉量(S_(MES))与物理刺激量之间只是间接关系,与生理刺激量呈直接关系;③不同负荷条件下,生理刺激量与S_(MES)间均呈凹向上型式关系。以上结果提示在制订RPE外加阻力标准时,除规定总阻力值外,在“中度”负荷水平时,还应有匹配条件的限制。