最新呼吸机治疗的肺保护策略幻灯片.ppt

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1、呼吸机治疗的肺保护策略呼吸机相关性肺损伤acuteparenchymallunginjuryandanacuteinflammatoryresponseinthelung.cytokines→alveoliandthesystemiccirculation→multipleorgandysfunctionmortality↑呼吸机相关性肺损伤ventilator-inducedlunginjury容量性损伤Volutrauma（largegasvolumes）压力性损伤Barotrauma（highairwaypressure）不张性损伤Atelectotrauma（alveolarcol

2、lapseandre-expansion）生物性损伤Biotrauma（increasedinflammation）小潮气量和呼气末正压lowertidalvolumeandPEEPVentilationwithlowertidalvolumesversustraditionaltidalvolumesinadultsforALIandARDS1202patientslowertidalvolume(≤7ml/kg)lowplateaupressure≤30cmH2Oversustidalvolume10to15ml/kgMortalityatday28long-termmortality

3、wasuncertainlowandconventionaltidalvolumewithplateaupressure≤31cmH2OwasnotsignificantlydifferentCochraneDatabaseSystRev.2004;(2):CD003844Higherversuslowerpositiveend-expiratorypressuresinpatientswiththeacuterespiratorydistresssyndrome549patientsacutelunginjuryandARDSlower-PEEPgroup8.3±3.2cmH2Ohighe

4、r-PEEPgroup13.2±3.5cmH2O(P<0.001).tidal-volume6ml/kgend-inspiratoryplateau-pressure≤30cmH2OTheratesofdeath24.9%27.5%(p=0.48)Fromday1today28,breathingwasunassisted14.5±10.4days13.8±10.6days(p=0.5)clinicaloutcomesaresimilarwhetherlowerorhigherPEEPlevelsareused.NEnglJMed.2004Jul22;351(4):327-36.Increa

5、singinspiratorytimeexacerbatesventilator-inducedlunginjuryduringhigh-pressure/high-volumemechanicalventilationSprague-Dawleyratsnegativecontrolgrouplowpressures(PIP=12cmH2O),rate=30,iT=0.5,1.0,1.5secsexperimentalgroupshighpressures(PIP=45cmH2O),rate=10,iT=0.5,1.0,1.5secslungcompliance,PaO2/FiO2rati

6、o,wet/drylungweight,anddrylung/bodyweightasinspiratorytimeincreased,staticlungcompliance(p=.0002)andPao2/Fio2(p=.001)decreased.Wet/drylungweights(p<.0001)anddrylung/bodyweights(p<.0001)increasedLightmicroscopyrevealedevidenceofintra-alveolaredemaandhemorrhageintheiT=1.0andiT=1.5animalsbutnottheLoPa

7、ndiT=0.5animals.CritCareMed.2002Oct;30(10):2295-9.新生儿呼吸窘迫综合征呼吸机治疗的肺保护性策略研究施丽萍孙眉月杜立中中华儿科杂志2003本项目研究的目的通过肺力学参数的监测（PM）指导呼吸机参数的调节来降低呼吸机相关性肺损伤的发生探讨新生儿RDS最合适的呼吸机参数允许性高碳酸血症对新生儿的影响非肺力学监测组（NPM）：1994~1997年,RDS50例，作为