欢迎来到天天文库
浏览记录
ID:33370386
大小:2.22 MB
页数:79页
时间:2019-02-24
《【6A文】航空医学因素英文培训课件.ppt》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、1AirlineTransitionCourseATPChapter17AeromedicalFactors2AeromedicalFactors3HypoxiaHypoxiaisastateofoxygendeficiencyinthebodysufficienttoimpairfunctionsofthebrainandotherorgans.4TypesofHypoxiaHypoxicHypoxiaLungsarenotgettingenoughoxygentodeliver.Causes:Breathingairatreduc
2、edbarometricpressure.StrangulationSevereAsthmaBreathholdingHypoventilationMalfunctioningoxygenequipmentataltitude.5Hypoxic(Altitude)HypoxiaThereisnotenoughoxygenmoleculesavailabletobreathwithsufficientpressure.Asweclimbthepressuredecreasesthereforethenumberofavailableoxy
3、genmoleculesalsodecreases.Hypoxicsymptomsdonotbegintobecomeevidentuntilabout5,000’especiallyatnight.6TypesofHypoxiaHypemicHypoxiaTransportationofOxygenisreduced.Causes:Drugs(nitritesandsulfanilamides)Chemicals(carbonmonoxideandcyanide)HeartFailureShockAcceleration(Gs)Po
4、sturalChangesTourniquets7Hypemic(Anemic)HypoxiaBloodisnotabletocarrytheavailableoxygen.Anemia,orareducednumberofhealthy,functioningredbloodcellsforanyreason,meanslesscapacityforbloodtocarryoxygen.Occursmostcommonlyistheformofcarbonmonoxidepoisoning.8CarbonMonoxidePoisoni
5、ngHemoglobinphysicallycarries75timesmoreoxygenmoleculesthancanbeabsorbedintheoxygensolution.Hemoglobinacceptscarbonmonoxide250timesmorethanoxygen.Thisreducestheblood’sabilitytocarryoxygen.9CarbonMonoxidePoisoningSymptomsinclude:HeadacheDrowsinessdizziness10StagnantHypoxi
6、aAnotherformofHypemicHypoxia.Theblood’sabilitytocarryoxygenisreducedduetothestagnatedflowofblood.Thisiscausedbytheheartfailingtopumpeffectively,anarteryconstrictingandcuttingofforreducingtheflow,andvenouspoolingofbloodduetogravity,suchasvaricoseveins.11TypesofHypoxiaHis
7、totoxicHypoxiaBodyisnotabletoutilizeoxygen.Causes:CarbonmonoxideCyanideAlcohol12HistotoxicHypoxiaHistotoxicmeansthecellexpectingandneedingoxygenisabnormalandunabletotakeupoxygen.Thisiscausedbytoxinsabsorbedbythecell.Thiscanoccurwhenalcoholispresentinthebloodorinthecellan
8、dpreventstheuseofoxygenbythecell.Thisiscausedbyalcohol,narcoticsandsomepoisons.13StagesofHypoxiaIndiffe
此文档下载收益归作者所有