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Chapter 41: Oxygenation
p p




FundamentalspofpNursing,p9thpEditionpMUL

TIPLEpCHOICE

1. Apnursepispteachingpstaffpaboutpthepconductionpofpthepheart.pInpwhichporderpwillpthepnursepp
resentpthepconductionpcycle,pstartingpwithpthepfirstpstructure?

1. BundlepofpHis

2. Purkinjepnetwork

3. Intraatrialppathways

4. Sinoatrialp(SA)pnode

5. Atrioventricularp(AV)pnode

a. 5,p4,p3,p2,p1
b. 4,p3,p5,p1,p2
c. 4,p5,p3,p1,p2 NURSINGTB.COM

d. 5,p3,p4,p2,p1

ANS:pB

ThepconductionpsystemporiginatespwithpthepSApnode,pthep“pacemaker”pofpthepheart.pThepelectricalpi
mpulsespareptransmittedpthroughpthepatriapalongpintraatrialppathwaysptopthepAVpnode.pItpassistspatria
lpemptyingpbypdelayingpthepimpulsepbeforeptransmittingpitpthroughpthepBundlepofpHispandpthepventri
cularpPurkinjepnetwork.



2. Apnursepispteachingptheppatientpwithpmitralpvalvepproblemspaboutpthepvalvespinpthepheart.pSt
artingponptheprightpsidepofpthepheart,pdescribepthepsequencepofpthepbloodpflowpthroughpthesepval
ves.

1. Mitral

2. Aortic

3. Tricuspid




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4.pPulmonic

a. 1,p3,p2,p4
b. 4,p3,p2,p1
c. 3,p4,p1,p2
d. 2,p4,p1,p3

ANS:pC

Thepbloodpflowspthroughpthepvalvespinpthepfollowingpdirection:ptricuspid,ppulmonic,pmitral,pandpaorti
c.



3.pApnursepexplainspthepfunctionpofpthepalveoliptopappatientpwithprespiratorypproblems.pWhichpinform
ationpaboutpthepalveoli’spfunctionpwillpthepnursepsharepwithptheppatient?

a. Carriespoutpgaspexchange
b. Regulatesptidalpvolume
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c. Producesphemoglobin
d. Storespoxygen

ANS:pA

Thepalveoluspispapcapillarypmembranepthatpallowspgaspexchangepofpoxygenpandpcarbonpdioxidepduri
ngprespiration.pThepalveolipdopnotpstorepoxygen,pregulateptidalpvolume,porpproducephemoglobin.



4. Apnursepauscultatespheartpsounds.pWhenpthepnursephearspS2,pwhichpvalvespispthepnursephearingpc
lose?

a. Aorticpandpmitral
b. Mitralpandptricuspid
c. Aorticpandppulmonic
d. Mitralpandppulmonic




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ANS:pC

Aspthepventriclespempty,pthepventricularppressurespdecrease,pallowingpclosurepofpthepaorticpandppul
monicpvalves,pproducingpthepsecondpheartpsound,pS2.pThepmitralpandptricuspidpproducepthepfirstphear
tpsound,pS1.pThepaorticpandpmitralpdopnotpclosepatpthepsameptime.pThepmitralpandppulmonicpdopnotpclo
sepatpthepsameptime.



5. Thepnursepispteachingpaboutpthepprocesspofpexchangingpgasespthroughpthepalveolarpcapillaryp
membrane.pWhichptermpwillpthepnursepuseptopdescribepthispprocess?

a. Ventilation
b. Surfactant
c. Perfusion
d. Diffusion

ANS:pD

Diffusionpispthepprocesspofpgasespexchangingpacrosspthepalveolipandpcapillariespofpbodyptissues.Ventila
tionpispthepprocesspofpm o v Ni nUgRgSaI Ns eGs Ti Bn .t Co OaMn d poutpofptheplungs.pSurfactantpispapchemicalpproduced
pinptheplungsptopmaintainpthepsurfaceptensionpofpthepalveolipandpkeeppthempfrompcollapsing.pPerfusion

pispthepabilitypofpthepcardiovascularpsystemptopcarrypoxygenatedpbloodptoptissuespandpreturnpdeoxyge

natedpbloodptopthepheart.



6. Apnursepispcaringpforpappatientpwhopwaspinpapmotorpvehiclepaccidentpthatpresultedpinpcervicalptr
aumaptopC4.pWhichpassessmentpisptheppriority?

a. Pulse
b. Respirations
c. Temperature
d. Bloodppressure

ANS:pB

Respirationspandpoxygenpsaturationpareptheppriorities.pCervicalptraumapatpC3ptopC5pusuallypresultspin
pparalysispofpthepphrenicpnerve.pWhenpthepphrenicpnervepispdamaged,pthepdiaphragmpdoespnotpdesce

ndpproperly,pthuspreducingpinspiratoryplungpvolumespandpcausingphypoxemia.pWhileppulse




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