1、2n为进一步治疗于2009年6月19日入我科RICU342009-6-1956Arthur P Wheeler, et al. Lancet, 2007, 369: 1553-15657肺毛细血管内皮的损伤,肺毛细血管内皮的损伤,通透性增加通透性增加型肺泡上皮细胞损伤,型肺泡上皮细胞损伤,表面活性物质缺失表面活性物质缺失肺泡水肿肺泡水肿肺泡萎缩肺泡萎缩透明膜的形成,氧弥散障碍透明膜的形成,氧弥散障碍通气血流比例失调通气血流比例失调微肺不张微肺不张肺内分流肺内分流肺顺应性肺顺应性功能残气量功能残气量呼吸窘迫呼吸窘迫难治性低氧血症难治性低氧血症广泛肺损伤和微循环障碍广泛肺损伤和微循环障碍89101
2、1121314151617(肺容积伤)(肺容积伤)(肺萎陷伤)(肺萎陷伤)(肺生物伤)(肺生物伤)(氧中毒)(氧中毒)(气压伤)(气压伤)18正常肺组织正常肺组织峰压峰压 45cmH2O,5min峰压峰压 45cmH2O,20minDreyfuss,et al. Am J Respir Crit Care Med, 1998, 157:294-323.19Slutsky AS,et al. Am J Respir Crit Care Med, 1998, 157:1721-5.20A 肺实变区; B 正常肺组织区(“婴儿肺”); C 肺萎陷区肺过度充气肺过度充气(肺容积伤)(肺容积伤)肺组织周
3、期性扩张和陷闭肺组织周期性扩张和陷闭(肺萎陷伤)(肺萎陷伤)Moloney ED,et al. Br J Anaesth, 2004, 92: 261-270.2122肺容积伤肺容积伤肺萎陷伤肺萎陷伤2324N Engl J Med, 1998, 338:347-542526N Engl J Med, 1998, 338:347-5427N Engl J Med 2000, 342:1301-1308.28N Engl J Med 2000, 342:1301-1308.29P=0.007P0.00130P0.00131N Engl J Med 2000, 342:1301-1308.P=0.
4、00739.8%31%32注:PVS为肺保护性通气策略;CVS为传统性通气策略;PBW为预计理想体重。3334Carvalho A,et al. Critical Care,2007,11:R863536N Engl J Med, 2004, 351:327-36.37N Engl J Med, 2004, 351:327-36.38N Engl J Med, 2004, 351:327-36.高高PEEP: 13.2 cmH2O低低PEEP:8.3 cmH2O3940414212170431015044Rouby JJ,et al. Am J Respir Crit Care Med 200
5、2,165: 11821186.454647nSpO2 90%100%48氧合指数氧合指数496月20日6月21日6月22日5051525354PalvPpl跨肺泡压(跨肺泡压(Ptr alv)=Palv-Ppl555657Lachmann B, Intensive Care Med,1992,18:319-321585960616263David Carney,et al. Crit Care Med, 2005, 33:S122S128.64nn对病死率的影响65Froese AB ,et al. Anesthesiology,1974,41:242255 66Wrigge H ,et a
6、l. Anesthesiology,2003,99(2):376-84 6768Spontaneous BreathP Phigh PlowT高压相时间高压相时间Thigh低压相时间低压相时间Tlow69Putensen C, et al.Am J Respir Crit Care Med 1999, 159:1241-1248 PaO2值值(mmHg)70Putensen C, et al.Am J Respir Crit Care Med 1999, 159:1241-1248 分流量分流量(shunt,%shunt,%)717273n2nPH 28cmH2OnPL 12cmH2OnTH 3.8snTL 1.2snFiO2 1.0747576