医学专题—急诊科呼吸机应用14037.doc

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1、机械通气一、机械通气的适应证：1、经积极治疗后病情恶化；2、意识障碍；3、 呼吸形式严重异常，如呼吸频率3540次/分或68次/分，或呼吸节律异常，或自主呼吸微弱或消失；4、血气分析提示严重通气和/或氧合障碍：PaO250mmHg，尤其是充分氧疗后仍24次/min，充血性心力衰竭患者的呼吸频率30次/min）；3、动用辅助呼吸肌或胸腹矛盾运动；4、血气异常PH45 mm Hg（1 mm Hg=0.133 kPa），或氧合指数200 mm Hg（氧合指数：动脉血氧分压/吸入氧浓度）；5、排除有应用NPPV禁忌证四、NPPV在不同疾病中的应用 1、COPD急性加重期（AECOPD） 2、心源性肺水

2、肿 3、免疫功能受损合并呼吸衰竭4、支气管哮喘急性严重发作5、NPPV辅助撤机6、辅助支气管纤维镜检查7、手术后呼吸衰竭8、肺炎9、急性肺损伤/急性呼吸窘迫综合征（ALI/ARDS）10、胸壁畸形或神经肌肉疾病11、胸部创伤12、拒绝气管插管的呼吸衰竭13、其他疾病：包括肺囊性纤维化、支气管扩张症、气管插管前改善氧合、辅助纤维支气管镜检查及辅助麻醉手术等五、NPPV的禁忌证、1、心跳或呼吸停止 2、自主呼吸微弱、昏迷 3、误吸危险性高及不能清除口咽及上呼吸道分泌物、呼吸道保护能力差 4、合并其他器官功能衰竭（血流动力学不稳定、不稳定的心律失常，消化道大出血/穿孔、严重脑部疾病等）* 5、未引流

3、的气胸* 6、颈部面部创伤、烧伤及畸形 7、近期面部、颈部、口腔、咽腔、食道及胃部手术* 8、上呼吸道梗阻 119、明显不合作或极度紧张* 10、严重低氧血症（PaO290%。7、PEEP PEEP的设置在参照目标PaO2和氧输送的基础上，与FiO2与VT联合考虑，下限通常在P-V曲线的低拐点（LIP）或LIP之上2cnH2O;还可根据PEEPi指导PEEP的调节，外源性PEEP水平大约为PEEPi 的80%时不增加总PEEP。一般45 cm H2O。 内容总结（1）机械通气一、机械通气的适应证：1、经积极治疗后病情恶化（2）3、 呼吸形式严重异常，如呼吸频率3540次/分或68次/分，或呼吸

4、节律异常，或自主呼吸微弱或消失地形平坦开阔，地层由第四系全新冲积层，第四系上更新统冲层组成，局部表覆第四系全新统人工堆积层。第四系全新统冲积层厚度约2550m，岩性主要为黏土、粉质黏土、粉土、粉砂、细砂；第四系上更新统冲积层厚度大于50m，岩性主要为黏性土、粉土、粉细砂等。管桩深度范围内地层主要为：粉土、黏土、粉质黏土，局部表层为杂填土。coupling Centre shall be checked, the second poured concrete strength of more than 70%. In the process of reaming or boring, apart

5、 from the special provisions in factory, does not allow any work that may affect the coupling Centre, such as irrigation, to cylinder connections to flood the condenser pipes and so on. Well boring, hinge bolt hole flange with coupling of vertical, not oblique. Mounting bolts should be added lubrica

6、nts, typing gently with a small hammer, not too loose or too tight, packed the bolts with the corresponding seal screw hole should be marked. 6.4.5.4.2 coupling reamed and pairings is close to the diameter of bolt bearing good hinge holes, dressed with a good two coupling bolts before you can move t

7、he rotor, boring-reaming hole in turn. Coupling bolts must be tight coupling is symmetrical diameter, in boring, reaming, two bolts out. Well boring, hinge bolt hole flange with coupling of vertical, not oblique. Due to the coupling bolts in accordance with hinge holes corresponding to the diameter

8、of the screw holes one by one after processing, processing back bolt installation location cannot be changed, so according to bolt after the actual weight difference of nut and lock washer to match. General requirements for coupling two symmetrical diameter bolt, nut and lock washers total weight di

9、fference should not be greater than 10 g and knocks stamped mark. (See Figure 18) The coupling bolts apply lubricant, and then gently with copper home, not too loose or too tight. Bolt Assembly is finished, symmetrical tightening all bolts to 30%, 50%, 70%, 100% force, and check the coupling flutter

10、 and before connecting the circle gradually changes its value should be less than 0.02mm. Tightening torque of the coupling bolts shall comply with the technical requirements manufacturers drawings, with a dynamometric wrench or log tension tools. Three wheel rotor swing test coupling connections should be checked: taking leave,