肺功能检查的诠释

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,肺功能检查的诠释,Pulmonary Function Test Interpretation,主要内容,测量肺容量的检查,Tests to Measure Lung Volumes,气体流量的测定,Tests of Gas Flow,肺弥散量的测定,Tests of Diffusing Capacity,主要内容,测量,肺容量,的检查,Tests to Measure Lung Volumes,气体流量的测定,Tests of Gas Flow,肺弥散量的测定,Tests of Diffusing Capacity,肺容量测定法,Spirometry,肺容量测定法是测定通过开放气道的气体容积,.,测量肺容量时，病人先平静呼吸，随后用最大力吸气和呼气,.,获得的肺容量,深吸气量（,IC,）,补吸气量（,IRV,）,补呼气量（,ERV,）,肺活量（,VC,）等,这些数值都和病人,用力,有关,。,肺容量测定法,Spirometry,Lung Volumes,4 Volumes,肺容积,4 Capacities,肺气量,IRV,TV,ERV,RV,IC,FRC,VC,TLC,RV,Tidal Volume (TV),Volume of air inspired and expired during normal quiet breathing,潮气量：,平静,呼吸时，每次吸入和呼出的气量,IRV,TV,ERV,RV,IC,FRC,VC,TLC,RV,Inspiratory,Reserve Volume (IRV),The maximum amount of air that can be inhaled after a normal tidal volume inspiration,补吸气量：,平静吸气末，,再,用力吸气所能吸入的的最大气体量,IRV,TV,ERV,RV,IC,FRC,VC,TLC,RV,Expiratory Reserve Volume (ERV),Maximum amount of air that can be exhaled from the resting expiratory level,补呼气量：,平静呼气末，再用力呼气所能呼出的最大气体量,IRV,TV,ERV,RV,IC,FRC,VC,TLC,RV,Residual Volume (RV),Volume of air remaining in the lungs at the end of maximum expiration,残气量：,补呼气末，残留在肺内的气量,IRV,TV,ERV,RV,IC,FRC,VC,TLC,RV,Vital Capacity (VC),Volume of air that can be exhaled from the lungs after a maximum inspiration,肺活量：,最大吸气后，再用力呼气所能呼出的最大气体量,VC = IRV +TV + ERV,IRV,TV,ERV,RV,IC,FRC,VC,TLC,RV,Inspiratory,Capacity (IC),Maximum amount of air that can be inhaled from the end of a tidal volume,深吸气量：,平静呼气末，用力吸气所能吸入的最大气体量,IC = IRV + TV,IRV,TV,ERV,RV,IC,FRC,VC,TLC,RV,Functional Residual Capacity (FRC),Volume of air remaining in the lungs at the end of a TV expiration,功能残气量：,平静呼气末,仍存留在肺内的气体量,FRC = ERV + RV,IRV,TV,ERV,RV,IC,FRC,VC,TLC,RV,Total Lung Capacity (TLC),Volume of air in the lungs after a maximum inspiration,肺总量：,用力作最大吸气后，肺内所容纳的气体量,TLC = IRV + TV + ERV + RV,IRV,TV,ERV,RV,IC,FRC,VC,TLC,RV,功能残气量测定,FRC,Functional Residual Capacity Measurements,三种方法,Three type of methods,平衡法,（,He,）,Equilibration methods,洗出法,（,N,2,）,Washout methods,体积描记法,Plethysmographic,methods,功能残气量测定,FRC,测出,FRC,后,计算出,肺总量,TLC,(VC + RV),残气量,RV,(FRC,ERV),限制性,肺疾病,肺总量,TLC,残气量,RV,阻塞性,肺疾病,肺总量,TLC,残气量,RV,FRC = ERV + RV,RV/TLC: 25,30 (,青年人,),；,35%,时，提示有不同程度的肺气肿 （老年人：,40%,）,主要内容,测量肺容量的检查,Tests to Measure Lung Volumes,气体流量的测定,Tests of Gas Flow,肺弥散量的测定,Tests of Diffusing Capacity,主要内容,测量肺容量的检查,Tests to Measure Lung Volumes,气体流量,的测定,Tests of Gas Flow,肺弥散量的测定,Tests of Diffusing Capacity,气体流量的测定,Test of Gas Flow,用力呼气呼吸描记法,方法：,最大力吸气后，再尽最大力,快速,呼气，通过,肺容量计测定肺呼出气流和体积,。,有用参数,用力肺活量,FVC,1,秒用力呼气量,FEV,1,1,秒最大呼气率,FEV,1,%,（,FEV,1,/FVC,）,FEV,1,%,1,秒最大呼气率,定义：,1,秒用力呼气量,用力肺活量（,FEV,1,/FVC,）,正常值：,80%,意义：,纠正了测量,1,秒用力呼气量,(FEV,1,),的个体差异,限制性,肺疾患,FEV,1,FEV,1,%,正常,阻塞性,肺疾患,FEV,1,FEV,1,%,应用气管扩张剂，,FEV,1,变化,10,，,病变,可逆,注意,如果病人检查时没有用最大力，这些测量并不准确,判断阻塞程度,60%,70%,轻度,阻塞,40%,60%,中度,阻塞,40%,重度,阻塞,FEV,1,%,1,秒最大呼气率,气体流量的测定,Test of Gas Flow,最大呼气中段流速,Forced Expiratory Flow from,25% to 75% of VC (,FEF,25-75,),最大自主通气量,Maximal Voluntary Ventilation (MVV),方法,通过呼吸速度描记器进行,12,秒尽可能快和深的呼吸，测量出呼出气量后乘以,5,算出一分钟最大通气量。,意义,不但反应了病人的主观用力，也反应了胸和肺的特性。,正常：,80%,异常：,60%,，通气储备能力降低。,气体流量的测定,Test of Gas Flow,主要内容,测量肺容量的检查,Tests to Measure Lung Volumes,气体流量的测定,Tests of Gas Flow,肺弥散量的测定,Tests of Diffusing Capacity,主要内容,测量肺容量的检查,Tests to Measure Lung Volumes,气体流量的测定,Tests of Gas Flow,肺弥散量,的测定,Tests of Diffusing Capacity,肺弥散量的测定,Test of Diffusing Capacity,概 念,弥散量是表示弥散效率的指标，,1mmHg,分压差作用下，,每分钟通过呼吸膜扩散的某气体的总量,方 法,目前都用,CO,弥散量作为测定和评估弥散功能的指标,(,DL,CO,),意 义,肺实质减少（如肺气肿）或肺泡毛细血管膜增厚,(,如,肺纤维化,),，肺弥散量,肺弥散量的测定,Test of Diffusing Capacity,方 法,一口气法,重复呼吸法,稳态法，肺弥散量,肺功能检查的临床应用,Pulmonary Function Test for Clinical Use,男性,女性,肺活量,(VC,，,L),5,3.5,残气量,(RV,，,L),1.8,1.7,肺总量,(TLC,，,L),6.8,5.2,功能残气量,(FRC,，,L),3.4,2.6,1,秒用力呼气量,(FEV,1,，,L),4.1,2.9,1,秒最大呼气率,(FEV,1,%),82,83,最大呼气中段流速,(FEF,25-75,，,L/Sec),4.3,3.3,最大自主通气量,(MVV,，,L/min),168,112,一氧化碳肺弥散量,(,DL,CO,mL,/min/mmHg),33,24,40,岁男性（身高,178cm,）和女性（身高,165cm,）肺功能正常值,通气功能障碍类型,Categories of Disease,阻塞性,Obstructive,限制性,Restrictive,混合性,Mixed,Classification of Ventilatory Defects,Normal,Obstruction,Mixed,Obstruction / Restriction,Restriction,各类型通气功能障碍的判定及鉴别,限制性,阻塞性,胸壁,肺实质,哮喘,支气管炎,肺气肿,肺总量,(TLC),或,肺活量,(VC),或,或,或,残气量,(RV),或,功能残气量,(FRC),最大自主通气量,(MVV),或,或,一氧化碳肺弥散量,(DL,CO,),或,或,1,秒用力呼气量,(FEV,1,),1,秒最大呼气率,(FEV,1,%),肺功能检查在临床上的应用,PRED BEST %PRED PRED BEST %PRED,FVC FET25-75%,FEV1 FET100%,FEV1/FVC FIVC,FEV3,Vol,Extrap,FEV3/FVC E Code,FEF25-75% MVV,IsoFEF25-75 f,FEF75-85% LUNG VOLUME PRED AVG %PRED,FEF25% TLC,FEF50% RV,FEF75% RV/TLC,Vmax,75 FRC PL,Vmax,50 VE,Vmax,25,Vt,PEF VC,肺功能检查在临床上的应用,病例：,PRED BEST %PRED,FVC,L 3.38 1.63 48,FEV1,L 2.62 0.73 28,FEV1/FVC,% 80 45,FEF25-75%,L/min 161 17 11,PEF,L/min 435 89 21,MVV,L/min 117 27 23,TLC,L 5.39 5.80 108,RV,L 2.11 4.13 195,RV/TLC,% 39 71 182,?,混合性通气功能障碍，,阻塞为主，肺气肿,（,男，,65,岁,，,COPD,）,流量,-,容量曲线,方 法,用力吸气至最大限度，然后用力呼出至不能再呼出为止,，其作法与用力肺活量测定基本相同，以,x-y,记录仪描计流量和容量的变化，即可得出,意义,从此曲线可得知用力肺活量，最大吸气流量和最大呼气流量，特别是流量与肺容量关系方面有重要的诊断意义,Airflow Obstruction,Patient less obstructed,Before Bronchodilator,Post Bronchodilator,Patient is obstructed,Normal loop,Restriction,Normal loop,Volume,Flow,用于诊断气道阻塞的,最大吸气和呼气流速,容积曲线,术后肺部并发症危险性和术前肺功能的关系,中度危险,高度危险,FVC,预计值的,50%,15ml/kg,FEV,1,2L,1L,FEV,1,/FVC,预计值的,70%,预计值的,35%,FEF,25%-75%,预计值的,50,D,L,CO,预计值的,50,MVV,预计值的,50,Thank You!,