THERAPIST MULTIPLE-CHOICE
EXAMINATION: PRACTICE TEST
QUESTIONS WITH VERIFIED ANSWERS
The wwphysician wworders wwa ww35% wwaerosol wwmask wwto wwbe wwset wwup wwfor wwa wwpatient wwwho wwrequires wwan
wwinspiratory wwflow wwof ww42 wwL/min. wwWhat wwis wwthe wwminimum wwflow wwrate wwto wwwhich wwthe wwflowmeter
wwmust wwbe wwset wwto wwmeet wwthis wwpatient's wwin- wwspiratory wwflow wwdemands?
A. ww6 wwL/min
wwB. ww8 wwL/min ww
C. ww10 wwL/min ww
D. ww12 wwL/min ww- wwAnswer ww- wwB, wwThe wwair/O2ratio wwfor wwa ww35% wwoxygen wwmixture wwis ww5 ww: ww1. wwTo
wwcalculate wwtotal wwflow wwoutput wwfrom wwthis wwdevice, wwadd wwthe wwratio wwparts wwtogether wwand wwmultiply
wwby wwthe wwliter wwflow: ww6 ww×6 ww= ww36 wwL/min, ww6 ww×8 ww= ww48 wwL/min, ww6 ww× ww10 ww= ww60 wwL/min, ww6 ww×12
ww= ww72 wwL/min. wwTotal wwflow wwneeded: ww42 wwL/min. wwThe wwminimum wwflow wwnecessary wwis ww8, wwgiving wwa
wwtotal wwflow wwof ww48 wwL/min. ww(Analysis)
A wwpremature ww3-week-old wwinfant wwis wwreceiving ww1 wwL/min
of wwO wwvia wwa wwnasal wwcannula wwand wwhas wwa wwPaO wwof ww43 wwtorr22
and wwa wwPaCO2 wwof ww40 wwtorr. wwThe wwrespiratory wwtherapist wwshould wwrecommend wwwhich wwof wwthe
wwfollowing?
A. wwIncrease wwthe wwcannula wwflow wwto ww2 wwL/min.
B. wwIntubate wwand wwinstitute wwmechanical wwventilation ww
C. wwInitiate wwCPAP wwof ww4 wwcm wwH2O wwand ww50% wwO2
D. wwIncrease wwthe wwcannula wwflow wwto ww5 wwL/min. ww- wwAnswer ww- wwA, wwA wwPaO2 wwof ww43 wwtorr wwrepresents
wwhypoxemia. wwThe wwnormal wwPaO2 wwfor wwan wwinfant wwis ww50-70 wwtorr. wwIncreasing wwthe wwcannula wwflow
wwby ww1 wwL/min wwis wwthe wwmost wwappropriate wwchoice wwto wwreturn wwthe wwPaO2 wwto wwnormal. wwWith wwa
wwnormal wwPaCO2 wwof ww40 wwtorr, wwmechanical wwventilation wwis wwnot wwindicated. ww(Analysis)
what wwis wwnormal wwPaO2 wwfor wwinfant ww? ww- wwAnswer ww- ww50-70 wwtorr.
A wwpatient wwarrives wwin wwthe wwemergency wwdepartment wwafter wwbeing wwpulled wwfrom wwa wwburning
wwhouse. wwThe wwrespiratory wwtherapist wwshould wwrecommend wwobtaining wwwhich wwof wwthe wwfollowing
wwmeasurements wwto wwbest wwdetermine wwthe wwsever- wwity wwof wwthe wwpatient's wwsmoke wwinhalation?
,A. wwSpO2
B. wwHbCO ww
C. wwPaO2
D. wwHb ww- wwAnswer ww- wwB, wwTo wwbest wwdetermine wwthe wwseverity wwof wwsmoke wwinhalation, wwan wwHbCO
wwlevel wwshould wwbe wwdetermined wwwith wwa wwco-oximeter. wwThe wwSpO2 wwvalue wwshould wwnever wwbe
wwevaluated wwon wwa wwpatient wwsuspected wwof wwCO wwpoisoning wwbecause wwa wwpulse wwoximeter wwis wwnot
wwcapable wwof wwdetermining wwwhat wwis wwbound wwto wwhemoglobin.
Pulse wwoximeters wwwork wwon wwthe wwprinciple wwof wwspectrophotometry wwwhere wwlightweight wwprobes
wwdirect wwfiltered wwlight wwof wwspecific wwwavelengths wwthrough wwthe wwskin wwor wwdigit. wwThe wwlight
wwabsorbed wwdiffers wwfor wwsaturated wwand wwdesaturated wwblood, wwwhether wwit's wwsaturated wwwith
wwoxygen wwor wwa wwcombination wwof wwoxygen wwand wwcarbon wwmonoxide. wwTherefore wwthe wwreading wwwill
wwbe wwerroneously wwhigh wwwhen wwHbCO wwis wwpresent. ww(Analysis)
To wwbest wwdetermine wwthe wwseverity wwof wwsmoke wwinhalation, wwan wwHbCO wwlevel wwshould wwbe
wwdetermined wwwith ww? ww- wwAnswer ww- wwco-oximeter
The wwphysician wwhas wwordered wwO2 wwto wwbe wwadministered wwto wwan wwactive ww3-year-old wwwith wwan wwSpO2
wwof ww86%. wwWhich wwof wwthe wwfollowing wwdelivery wwdevices wwwould wwyou wwrecommend wwfor wwthis
wwpatient?
A. ww1- wwto ww2-L wwnasal wwcannula ww
B. wwAir-entrainment wwmask ww
C. wwSimple wwO2 wwmask
D.O2 wwhood ww- wwAnswer ww- wwA, wwAn wwactive ww3-year-old wwgenerally wwtolerates wwa wwcannula wwmuch
wwbetter wwthan wwany wwkind wwof wwmask wwand wwis wwtoo wwlarge wwfor wwan wwO2hood. ww(Application)
The wwability wwof wwthe wwpatient wwto wwfollow wwinstructions wwwould wwbe wwindicated wwby wwwhich wwof wwthe
wwfollowing?
A. wwOrientation wwto wwperson
B. wwPerformance wwof wwtasks wwwhen wwasked
wwC. wwAbility wwto wwfeed wwhimself
D. wwAwareness wwof wwtime ww- wwAnswer ww- wwB, wwIf wwthe wwpatient wwis wwable wwto wwperform wwsimple wwtasks
wwwhen wwasked, wwthis wwbest wwdetermines wwhis wwor wwher wwability wwto wwfollow wwinstructions. wwThis wwis
wwimportant wwbefore wwadministering wwan wwincentive wwspirometry wwor wwIPPB wwtreatment, wwwhich
wwrequires wwthe wwpatient wwto wwbe wwable wwto wwfollow wwinstructions wwwell wwor wwthe wwtreatment wwwill wwnot
wwbe wweffective. ww(Recall)
If wwthe wwpatient wwis wwable wwto wwperform wwsimple wwtasks wwwhen wwasked, wwthis wwbest wwdetermines wwhis wwor
wwher wwability wwto wwfollow wwinstructions. wwThis wwis wwimportant wwbefore wwadministering wwan? ww- wwAnswer ww-
,wwincentive wwspirometry wwor wwIPPB wwtreatment, wwwhich wwrequires wwthe wwpatient wwto wwbe wwable wwto
wwfollow wwinstructions wwwell wwor wwthe wwtreatment wwwill wwnot wwbe wweffective. ww(Recall)
You wwsuspect wwa wwpatient wwmay wwhave wwa wwpulmonary wwembolism. wwWhich wwof wwthe wwfollowing wwwould
wwbe wwthe wwmost wwappropriate wwrecommendation wwfor wwdiagnosis wwof wwthis wwcondition?
A. wwBronchoscopy
B. wwV/Q wwlung wwscan
C. wwCoagulation wwstudies ww
D. wwShunt wwstudy ww- wwAnswer ww- wwB, wwThe wwbest wwdiagnostic wwtest wwto wwdetermine wwwhether wwa
wwpulmonary wwembolism wwis wwpresent wwis wwthe wwV/Q wwlung wwscan. ww(Application)
To wwmost wweffectively wwincrease wwa wwsedated, wwparalyzed wwpatient's wwalveolar wwminute wwventilation
wwwhile wwthe wwpatient wwis wwon wwvolume-controlled wwventilation wwin wwthe wwassist-control wwmode, wwyou
wwwould wwrecommend wwincreasing wwwhich wwof wwthe wwfollowing?
A. wwPEEP
B. wwInspiratory wwflow
ww C. wwVT
D. wwVentilator wwrate ww- wwAnswer ww- wwC
Alveolar wwminute wwventilation ww= ww(VT ww- wwVD) ww× wwrespiratory wwrate
It wwrepresents wwthe wwvolume wwactually wwreaching wwthe wwalveoli wwper wwminute. wwIt wwtakes wwinto wwaccount
wwanatomic wwdead wwspace ww(VD), wwwhich wwis wwapproximately ww1 wwmL/lb wwof wwbody wwweight. wwAnatomic
wwVD wwis wwthat wwportion wwof wwthe wwairway wwwhere wwno wwgas wwexchange wwoccurs. wwIf wwa wwpatient's
wwalveolar wwminute wwventilation wwis wwto wwbe wwincreased, wwthe wwVT wwmust wwbe wwincreased. wwIf wwonly wwthe
wwventilator wwrate wwis wwincreased, wwthe wwsame wwVT wwis wwdelivered, wweven wwthough wwthe wwminute
wwventilation ww(VT ww× wwRR) wwincreases. ww(Recall)
what wwis wwthe wwformula wwfor wwalveolar wwminute wwventilation ww? ww- wwAnswer ww- ww(VT ww- wwVD) ww×
wwrespiratory wwrate
Failure wwto wwhyperoxygenate wwa wwpatient wwon wwa wwventilator wwbefore wwET wwsuctioning wwmay wwresult wwin
A. wwHypoxemia ww
B. wwHypocapnia ww
C. wwBradycardia
D. wwHypertension ww- wwAnswer ww- wwA, wwIt wwis wwimportant wwduring wwET wwsuctioning wwthat wwthe wwPaO2 wwbe
wwmaintained wwwithin wwa wwnormal wwrange. wwThis wwrequires wwincreasing wwthe wwoxygen wwpercentage
wwduring wwthe wwprocedure. wwFailure wwto wwhyperoxygenate wwmay wwcause wwhypoxemia, wwresulting wwin
wwcardiac wwarrhythmias. wwBradycardia wwmay wwoccur wwas wwa wwresult wwof wwvagal wwstimulation. ww(Application)
, while wwET wwsuctioning ww, wwFailure wwto wwhyperoxygenate wwmay wwcause wwhypoxemia, wwresulting wwin ww? ww-
wwAnswer ww- wwcardiac wwarrhythmias
while wwET wwsuctioning wwa wwpt, wwBradycardia wwmay wwoccur wwas wwa wwresult wwof ww? ww- wwAnswer ww- wwvagal
wwstimulation
The wwmost wwreliable wwmethod wwof wwdetermining wwwhether wwthe wwlungs wwof wwa wwpatient wwreceiving
wwmechanical wwventila- wwtion wware wwgetting wwstiffer wwand wwharder wwto wwventilate wwis wwby wwmeasuring wwthe
A. wwStatic wwlung wwcompliance
B. wwDynamic wwlung wwcompliance
C. wwSpontaneous wwVT
D. wwPaO2 ww- wwAnswer ww- wwA, wwWhen wwlungs wwget wwstiffer wwand wwharder wwto wwventilate, wwgreater
wwpressure wwis wwrequired wwto wwmove wwthe wwsame wwvolume wwof wwair. wwBecause wwpeak wwinspiratory
wwpressure wwincreases wwwhen wwRAW wwincreases ww(e.g., wwwhen wwairway wwsecretions wware wwpresent wwor
wwwater wwis wwin wwthe wwventilator wwtubing), wwthis wwpressure wwdoes wwnot wwreflect wwhow wwstiff wwthe wwlungs
wwactually wware. wwWe wwdetermine wwthe wwplateau wwor wwstatic wwpressure wwby wwholding wwthe wwvolume wwin
wwthe wwpatient's wwlungs wwfor ww1 wwto ww2 wws. wwThis wwpressure wwclosely wwrelates wwto wwalveolar wwpressure.
wwPEEP ww(if wwused) wwis wwsubtracted wwfrom wwthe wwplateau wwpressure wwand wwthis wwnumber wwis wwdivided
wwinto wwthe wwVT. wwThe wwresults wwdetermine wwhow wwcompliant wwthe wwlungs wware. ww(Application)
We wwdetermine wwthe wwplateau wwor wwstatic wwpressure wwby wwholding wwthe wwvolume wwin wwthe wwpatient's
wwlungs wwfor?
what wwis wwthe wwformula wwfor wwstatic wwcompliance ww? ww- wwAnswer ww- ww1 wwto ww2 wws.
This wwpressure wwclosely wwrelates wwto wwalveolar wwpressure. wwPEEP ww(if wwused) wwis wwsubtracted wwfrom wwthe
wwplateau wwpressure wwand wwthis wwnumber wwis wwdivided wwinto wwthe wwVT. wwThe wwresults wwdetermine wwhow
wwcompliant wwthe wwlungs wware.
A ww60-kg ww(132-lb) ww52-year-old wwman wwis wwadmitted wwto wwthe wwICU wwfor wwthe wwtreatment wwof
wwrefractory wwhypoxemia. wwHe wwis wwcurrently wwon wwVC-SIMV wwand wwpressure wwsupport wwof ww10 wwcm wwH2O
wwwith wwan wwFiO2 wwof ww0.60. wwOther wwpertinent wwdata wware wwbelow:
pH ww7.49
PaCO2 ww30 wwtorr
PaO2 ww59 wwtorr
EXAMINATION: PRACTICE TEST
QUESTIONS WITH VERIFIED ANSWERS
The wwphysician wworders wwa ww35% wwaerosol wwmask wwto wwbe wwset wwup wwfor wwa wwpatient wwwho wwrequires wwan
wwinspiratory wwflow wwof ww42 wwL/min. wwWhat wwis wwthe wwminimum wwflow wwrate wwto wwwhich wwthe wwflowmeter
wwmust wwbe wwset wwto wwmeet wwthis wwpatient's wwin- wwspiratory wwflow wwdemands?
A. ww6 wwL/min
wwB. ww8 wwL/min ww
C. ww10 wwL/min ww
D. ww12 wwL/min ww- wwAnswer ww- wwB, wwThe wwair/O2ratio wwfor wwa ww35% wwoxygen wwmixture wwis ww5 ww: ww1. wwTo
wwcalculate wwtotal wwflow wwoutput wwfrom wwthis wwdevice, wwadd wwthe wwratio wwparts wwtogether wwand wwmultiply
wwby wwthe wwliter wwflow: ww6 ww×6 ww= ww36 wwL/min, ww6 ww×8 ww= ww48 wwL/min, ww6 ww× ww10 ww= ww60 wwL/min, ww6 ww×12
ww= ww72 wwL/min. wwTotal wwflow wwneeded: ww42 wwL/min. wwThe wwminimum wwflow wwnecessary wwis ww8, wwgiving wwa
wwtotal wwflow wwof ww48 wwL/min. ww(Analysis)
A wwpremature ww3-week-old wwinfant wwis wwreceiving ww1 wwL/min
of wwO wwvia wwa wwnasal wwcannula wwand wwhas wwa wwPaO wwof ww43 wwtorr22
and wwa wwPaCO2 wwof ww40 wwtorr. wwThe wwrespiratory wwtherapist wwshould wwrecommend wwwhich wwof wwthe
wwfollowing?
A. wwIncrease wwthe wwcannula wwflow wwto ww2 wwL/min.
B. wwIntubate wwand wwinstitute wwmechanical wwventilation ww
C. wwInitiate wwCPAP wwof ww4 wwcm wwH2O wwand ww50% wwO2
D. wwIncrease wwthe wwcannula wwflow wwto ww5 wwL/min. ww- wwAnswer ww- wwA, wwA wwPaO2 wwof ww43 wwtorr wwrepresents
wwhypoxemia. wwThe wwnormal wwPaO2 wwfor wwan wwinfant wwis ww50-70 wwtorr. wwIncreasing wwthe wwcannula wwflow
wwby ww1 wwL/min wwis wwthe wwmost wwappropriate wwchoice wwto wwreturn wwthe wwPaO2 wwto wwnormal. wwWith wwa
wwnormal wwPaCO2 wwof ww40 wwtorr, wwmechanical wwventilation wwis wwnot wwindicated. ww(Analysis)
what wwis wwnormal wwPaO2 wwfor wwinfant ww? ww- wwAnswer ww- ww50-70 wwtorr.
A wwpatient wwarrives wwin wwthe wwemergency wwdepartment wwafter wwbeing wwpulled wwfrom wwa wwburning
wwhouse. wwThe wwrespiratory wwtherapist wwshould wwrecommend wwobtaining wwwhich wwof wwthe wwfollowing
wwmeasurements wwto wwbest wwdetermine wwthe wwsever- wwity wwof wwthe wwpatient's wwsmoke wwinhalation?
,A. wwSpO2
B. wwHbCO ww
C. wwPaO2
D. wwHb ww- wwAnswer ww- wwB, wwTo wwbest wwdetermine wwthe wwseverity wwof wwsmoke wwinhalation, wwan wwHbCO
wwlevel wwshould wwbe wwdetermined wwwith wwa wwco-oximeter. wwThe wwSpO2 wwvalue wwshould wwnever wwbe
wwevaluated wwon wwa wwpatient wwsuspected wwof wwCO wwpoisoning wwbecause wwa wwpulse wwoximeter wwis wwnot
wwcapable wwof wwdetermining wwwhat wwis wwbound wwto wwhemoglobin.
Pulse wwoximeters wwwork wwon wwthe wwprinciple wwof wwspectrophotometry wwwhere wwlightweight wwprobes
wwdirect wwfiltered wwlight wwof wwspecific wwwavelengths wwthrough wwthe wwskin wwor wwdigit. wwThe wwlight
wwabsorbed wwdiffers wwfor wwsaturated wwand wwdesaturated wwblood, wwwhether wwit's wwsaturated wwwith
wwoxygen wwor wwa wwcombination wwof wwoxygen wwand wwcarbon wwmonoxide. wwTherefore wwthe wwreading wwwill
wwbe wwerroneously wwhigh wwwhen wwHbCO wwis wwpresent. ww(Analysis)
To wwbest wwdetermine wwthe wwseverity wwof wwsmoke wwinhalation, wwan wwHbCO wwlevel wwshould wwbe
wwdetermined wwwith ww? ww- wwAnswer ww- wwco-oximeter
The wwphysician wwhas wwordered wwO2 wwto wwbe wwadministered wwto wwan wwactive ww3-year-old wwwith wwan wwSpO2
wwof ww86%. wwWhich wwof wwthe wwfollowing wwdelivery wwdevices wwwould wwyou wwrecommend wwfor wwthis
wwpatient?
A. ww1- wwto ww2-L wwnasal wwcannula ww
B. wwAir-entrainment wwmask ww
C. wwSimple wwO2 wwmask
D.O2 wwhood ww- wwAnswer ww- wwA, wwAn wwactive ww3-year-old wwgenerally wwtolerates wwa wwcannula wwmuch
wwbetter wwthan wwany wwkind wwof wwmask wwand wwis wwtoo wwlarge wwfor wwan wwO2hood. ww(Application)
The wwability wwof wwthe wwpatient wwto wwfollow wwinstructions wwwould wwbe wwindicated wwby wwwhich wwof wwthe
wwfollowing?
A. wwOrientation wwto wwperson
B. wwPerformance wwof wwtasks wwwhen wwasked
wwC. wwAbility wwto wwfeed wwhimself
D. wwAwareness wwof wwtime ww- wwAnswer ww- wwB, wwIf wwthe wwpatient wwis wwable wwto wwperform wwsimple wwtasks
wwwhen wwasked, wwthis wwbest wwdetermines wwhis wwor wwher wwability wwto wwfollow wwinstructions. wwThis wwis
wwimportant wwbefore wwadministering wwan wwincentive wwspirometry wwor wwIPPB wwtreatment, wwwhich
wwrequires wwthe wwpatient wwto wwbe wwable wwto wwfollow wwinstructions wwwell wwor wwthe wwtreatment wwwill wwnot
wwbe wweffective. ww(Recall)
If wwthe wwpatient wwis wwable wwto wwperform wwsimple wwtasks wwwhen wwasked, wwthis wwbest wwdetermines wwhis wwor
wwher wwability wwto wwfollow wwinstructions. wwThis wwis wwimportant wwbefore wwadministering wwan? ww- wwAnswer ww-
,wwincentive wwspirometry wwor wwIPPB wwtreatment, wwwhich wwrequires wwthe wwpatient wwto wwbe wwable wwto
wwfollow wwinstructions wwwell wwor wwthe wwtreatment wwwill wwnot wwbe wweffective. ww(Recall)
You wwsuspect wwa wwpatient wwmay wwhave wwa wwpulmonary wwembolism. wwWhich wwof wwthe wwfollowing wwwould
wwbe wwthe wwmost wwappropriate wwrecommendation wwfor wwdiagnosis wwof wwthis wwcondition?
A. wwBronchoscopy
B. wwV/Q wwlung wwscan
C. wwCoagulation wwstudies ww
D. wwShunt wwstudy ww- wwAnswer ww- wwB, wwThe wwbest wwdiagnostic wwtest wwto wwdetermine wwwhether wwa
wwpulmonary wwembolism wwis wwpresent wwis wwthe wwV/Q wwlung wwscan. ww(Application)
To wwmost wweffectively wwincrease wwa wwsedated, wwparalyzed wwpatient's wwalveolar wwminute wwventilation
wwwhile wwthe wwpatient wwis wwon wwvolume-controlled wwventilation wwin wwthe wwassist-control wwmode, wwyou
wwwould wwrecommend wwincreasing wwwhich wwof wwthe wwfollowing?
A. wwPEEP
B. wwInspiratory wwflow
ww C. wwVT
D. wwVentilator wwrate ww- wwAnswer ww- wwC
Alveolar wwminute wwventilation ww= ww(VT ww- wwVD) ww× wwrespiratory wwrate
It wwrepresents wwthe wwvolume wwactually wwreaching wwthe wwalveoli wwper wwminute. wwIt wwtakes wwinto wwaccount
wwanatomic wwdead wwspace ww(VD), wwwhich wwis wwapproximately ww1 wwmL/lb wwof wwbody wwweight. wwAnatomic
wwVD wwis wwthat wwportion wwof wwthe wwairway wwwhere wwno wwgas wwexchange wwoccurs. wwIf wwa wwpatient's
wwalveolar wwminute wwventilation wwis wwto wwbe wwincreased, wwthe wwVT wwmust wwbe wwincreased. wwIf wwonly wwthe
wwventilator wwrate wwis wwincreased, wwthe wwsame wwVT wwis wwdelivered, wweven wwthough wwthe wwminute
wwventilation ww(VT ww× wwRR) wwincreases. ww(Recall)
what wwis wwthe wwformula wwfor wwalveolar wwminute wwventilation ww? ww- wwAnswer ww- ww(VT ww- wwVD) ww×
wwrespiratory wwrate
Failure wwto wwhyperoxygenate wwa wwpatient wwon wwa wwventilator wwbefore wwET wwsuctioning wwmay wwresult wwin
A. wwHypoxemia ww
B. wwHypocapnia ww
C. wwBradycardia
D. wwHypertension ww- wwAnswer ww- wwA, wwIt wwis wwimportant wwduring wwET wwsuctioning wwthat wwthe wwPaO2 wwbe
wwmaintained wwwithin wwa wwnormal wwrange. wwThis wwrequires wwincreasing wwthe wwoxygen wwpercentage
wwduring wwthe wwprocedure. wwFailure wwto wwhyperoxygenate wwmay wwcause wwhypoxemia, wwresulting wwin
wwcardiac wwarrhythmias. wwBradycardia wwmay wwoccur wwas wwa wwresult wwof wwvagal wwstimulation. ww(Application)
, while wwET wwsuctioning ww, wwFailure wwto wwhyperoxygenate wwmay wwcause wwhypoxemia, wwresulting wwin ww? ww-
wwAnswer ww- wwcardiac wwarrhythmias
while wwET wwsuctioning wwa wwpt, wwBradycardia wwmay wwoccur wwas wwa wwresult wwof ww? ww- wwAnswer ww- wwvagal
wwstimulation
The wwmost wwreliable wwmethod wwof wwdetermining wwwhether wwthe wwlungs wwof wwa wwpatient wwreceiving
wwmechanical wwventila- wwtion wware wwgetting wwstiffer wwand wwharder wwto wwventilate wwis wwby wwmeasuring wwthe
A. wwStatic wwlung wwcompliance
B. wwDynamic wwlung wwcompliance
C. wwSpontaneous wwVT
D. wwPaO2 ww- wwAnswer ww- wwA, wwWhen wwlungs wwget wwstiffer wwand wwharder wwto wwventilate, wwgreater
wwpressure wwis wwrequired wwto wwmove wwthe wwsame wwvolume wwof wwair. wwBecause wwpeak wwinspiratory
wwpressure wwincreases wwwhen wwRAW wwincreases ww(e.g., wwwhen wwairway wwsecretions wware wwpresent wwor
wwwater wwis wwin wwthe wwventilator wwtubing), wwthis wwpressure wwdoes wwnot wwreflect wwhow wwstiff wwthe wwlungs
wwactually wware. wwWe wwdetermine wwthe wwplateau wwor wwstatic wwpressure wwby wwholding wwthe wwvolume wwin
wwthe wwpatient's wwlungs wwfor ww1 wwto ww2 wws. wwThis wwpressure wwclosely wwrelates wwto wwalveolar wwpressure.
wwPEEP ww(if wwused) wwis wwsubtracted wwfrom wwthe wwplateau wwpressure wwand wwthis wwnumber wwis wwdivided
wwinto wwthe wwVT. wwThe wwresults wwdetermine wwhow wwcompliant wwthe wwlungs wware. ww(Application)
We wwdetermine wwthe wwplateau wwor wwstatic wwpressure wwby wwholding wwthe wwvolume wwin wwthe wwpatient's
wwlungs wwfor?
what wwis wwthe wwformula wwfor wwstatic wwcompliance ww? ww- wwAnswer ww- ww1 wwto ww2 wws.
This wwpressure wwclosely wwrelates wwto wwalveolar wwpressure. wwPEEP ww(if wwused) wwis wwsubtracted wwfrom wwthe
wwplateau wwpressure wwand wwthis wwnumber wwis wwdivided wwinto wwthe wwVT. wwThe wwresults wwdetermine wwhow
wwcompliant wwthe wwlungs wware.
A ww60-kg ww(132-lb) ww52-year-old wwman wwis wwadmitted wwto wwthe wwICU wwfor wwthe wwtreatment wwof
wwrefractory wwhypoxemia. wwHe wwis wwcurrently wwon wwVC-SIMV wwand wwpressure wwsupport wwof ww10 wwcm wwH2O
wwwith wwan wwFiO2 wwof ww0.60. wwOther wwpertinent wwdata wware wwbelow:
pH ww7.49
PaCO2 ww30 wwtorr
PaO2 ww59 wwtorr
