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Lecture notes

N664(PathoPharm) USFCA MEMSN 2023 PATHO HESI REVIEW

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N664(PathoPharm) USFCA MEMSN 2023 PATHO HESI REVIEW

Institution
University Of San Francisco
Module
NURS664 (HESI)

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PathoHesiReview
AcidBaseImbalance-Theunderlyingcauseofanacidbaseimbalanceneedstobeidentifiedandthecauseneedstobetreated-Buffersprovideimmedia teprotectionagainstchangesinthehydrogenionconcentrationintheextracellularfluid-Thelungsaretheseconddefenseofthebody,theyinteractwiththebuffersystemtomaintainacidbasebalance-Duringacidosis,thepHdecreasesandtherespiratoryrateanddepthincreaseinanattempttoexhaleacids-Duringalkalosis,thepHincreasesandtherespiratoryrateanddepthdecrease-Duringcompensa tedacidosistheRRanddepthincreasetoexhaleacids-Duringcompensa tedalkalosistherespiratoryrateanddepthdecrease,CO2isretainedtoneutralizeanddecreasethestrengthofexcessbicarb-Duringacidosisthebodyprotectsitselffromtheacidicstatebymovinghydrogenionsintothecells->thenpotassiummovesouttomakeroomforhydrogenionsandthepotassiumlevelincreases
Cardiovasculardisorders(PathoI&II)
Areasoftheheart:-RightatriumreceivesbloodfromtheIVCandSVC,theleftatriumreceivesbloodfromthelungsviathepulmveins-Rightventriclepropelsbloodintopulmonar y,theleftventricleisthemainpumpoftheheartHemodynamics-Systole:contractionphaseofcardiaccyclewhencardiaccellscontractforcingbloodintotheaorticandpulmarteries-CO:amountofbloodpumpedbytheventricleinlitersperminute-SV:amountofbloodejectedfromoneventricleinonecontraction-Preload:degreeofstretchofthecardiacmusclefibersattheendofdiastole-Volumereturnedtotheheart(venousreturn)causespreloadEjectionfraction:thepercentofend-dias tolicvolumeejectedwitheachheartbea tWhatistheRAASsystem?-Renin-AngiotensinAldosteroneSystem-Ithelpsmaintainbloodvolumeandpressurethroughreabsorption.Retentionofsodiumandwater-AngiotensinIIcausespotentvasoconstrictionandaldosteronesecretion-leadingtoanincreaseinBPWhatfactorsaffectpreload?-IncreasedCVPresultingfromadecreasedvenouscompliance-Increasedatrialforceofcontraction-Increasedaorticpressure
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University Of San Francisco
Module
NURS664 (HESI)
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