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Joshua Chambers Module 5 OSCE document Consultation skills: Information about the station: 11-minute station Introduction SSS ICE RAV – Signpost, summarise and screen Ideas, concerns and expectations Recognise, acknowledge, validate HAVE A STRUCTURE! Have some key phrases as backups! Introduction: Wash hands Introduce High my name is ______. I'm a ______ medical student from the UEA. And I've been to talk to you today is that okay? Name and DOB Explain structure ‘This consultation will just involve me asking about your symptoms and then a few questions about your past medical history, lifestyle and any medications that you’re on, does that sound okay?’ Are you comfortable for me to begin? Open question: ‘so what has brought you in today?’ Presenting complaint: Cough - duration, severity, time of the day Wheeze – (ask the patient to clarify what they mean by wheeze) Sputum – colour, consistency, volume Haemoptysis – how much, how often? Breathlessness – timing, exacerbating and reliving factors, EXERCISE TOLERANCE. Chest pain – SOCRATES SAWTEM: “Just to check that I haven’t missed anything, I’m just going to ask you some general questions about your health” Ask about Ortho/Rhemo question: “Have you go any aches or pains in your joints?” PMHx: Open question about any other medical condition Ask about: Atopy Asthma Childhood infections FHx: Any conditions which run in the family? ‘specifically any lung conditions which run in the family’ ‘Just a question we ask everyone is there a history of lung cancer?’

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JoshuaChambers

Module5OSCEdocumentConsultationskills:Informationaboutthestation:

• 11-minutestation• Introduction• SSSICERAV–Signpost,summariseandscreen• Ideas,concernsandexpectations• Recognise,acknowledge,validate• HAVEASTRUCTURE!• Havesomekeyphrasesasbackups!

Introduction:• Washhands• Introduce• Highmynameis______.I'ma______medicalstudentfromtheUEA.AndI'vebeen

totalktoyoutodayisthatokay?• NameandDOB• Explainstructure• ‘Thisconsultationwilljustinvolvemeaskingaboutyoursymptomsandthenafew

questionsaboutyourpastmedicalhistory,lifestyleandanymedicationsthatyou’reon,doesthatsoundokay?’

• Areyoucomfortableformetobegin?• Openquestion:‘sowhathasbroughtyouintoday?’

Presentingcomplaint:• Cough-duration,severity,timeoftheday• Wheeze–(askthepatienttoclarifywhattheymeanbywheeze)• Sputum–colour,consistency,volume• Haemoptysis–howmuch,howoften?• Breathlessness–timing,exacerbatingandrelivingfactors,EXERCISETOLERANCE.• Chestpain–SOCRATES

SAWTEM:• “JusttocheckthatIhaven’tmissedanything,I’mjustgoingtoaskyousomegeneral

questionsaboutyourhealth”• AskaboutOrtho/Rhemoquestion:“Haveyougoanyachesorpainsinyour

joints?”PMHx:

• Openquestionaboutanyothermedicalcondition• Askabout:• Atopy• Asthma• Childhoodinfections

FHx:• Anyconditionswhichruninthefamily?• ‘specificallyanylungconditionswhichruninthefamily’• ‘Justaquestionweaskeveryoneisthereahistoryoflungcancer?’

JoshuaChambers

SHx:• Smoking

o 1packyear=20cigaretteso Howmany?o Forhowlong

• Alcoholo Amounto “Whatisyourdrinkofchoice?”

• Occupationo exposuretoasbestoso zookeepero coalminers

• House/Livingarrangementso House/bungalowo Aloneorwithfamily/supporto Adjustmentsathomeo Okaywithstairs?

• Petso chlamydiapsittacio allergenso birdfancierslung

• Anyforeigntravel?o PE/DVT/TB

• Anyuseofrecreationaldrugs• IMPACTONQOL-GOODTORAV

DHx:• ALLERGIES• Iftime,askaboutOTCandherbal• Inhalers?–whatcolour?Howdotheytakeit?• Bronchoconstriction:betablockers,opioids,NSAIDs• DrycoughwithACEinhibitors• Lungfibrosis/parenchymaldiseasewithcytotoxics,DMARDs• ThePILL?–iffemale(DVT/PE)• Amiodaroneandnitrofurantoin(pleuraleffusion,fibrosis)

Commonconditionsthatcouldcomeup?• Asthma• COPDandwithexacerbation• Pneumonia• PE• Lungcancer• Bronchiectasis• Pneumothorax

Respiratoryexamination:Introduction:

JoshuaChambers

• WASHHANDS• Introduceyourself• ConfirmpatientsnameandDOB• ‘I'vebeenaskedbythedoctortodoarespiratoryexaminationonyoutodayisthat

okay?Thisexaminationwillconsistofmehavingageneralinspection,thenhavingalookatyourhandsmouthandchestandthenhavingalistentoyourchest.Isthatokay?’

• Askthepatienttoadequatelyexposethemselves• Positionthepatientat45degrees

Inspection:JVP(Increasedheightorwaveform)/APEXBEAT/oralcandsis/legsperipheraloedema/Practiseeverything/cricosternaldistance/FLAPPINGTREMMOR/havinganydifficultieswithbreathing?Infectioninmouth/CommentonrespiratoryGeneralexamination:

• Commentonthegeneralwell-beingofthepatientandthepresenceofanyaidsaroundthebedsidee.g“oxygen,sputumpots,inhalers”

• Isthispatientinrespiratorydistress?canthepttalkinfullsentences?

• Symptomsofrespiratorydistress:“There’sno…”• nasalflaring,mouthbreathing,subcostal/intercostalmusclerecession,usesof

accessorymuscles(trapeziusandsternocleidomastoid)Hands:

• Lookingatthehandsforanyclubbing,tarstaining,cyanosisandatremor• Cockthewristsback–lookforCO2retentiontremor• Checkpulseandresprate

o Normalrespiratoryrate-12-20o Tachyponoea-greaterthan20o Bradyponoea-lessthan12

• Offertotakeabloodpressure• ‘ifIhadmoretimeIwouldideallytakeabloodpressure’

Eyes:• CouldIjustpulltheskinofyoureyedown?• Anaemia• Jaundice

Mouth:• Oralcandidiasis,centralcyanosis• Pursedlipbreathing

Neck:• Isthetracheacentral?• Cricosternaldistance(3-4fingers)

• Cricosternaldistancejugularnotchtocricoid–ifobstructivelungdiseasethedistancewillbesmallerifhyperinflationispresent3fingerdistance

• JVPandhepatojugularreflux• Askforabdopain–lookupforthis• Lookawayat45degrees

JoshuaChambers

• PressdownonstomachLymphNodes:

• Submental,submandibular,preauricular,postauricular,occipital,anteriorandposteriorcervicalchainandsupraclaviclar

Legs:

• Bilateraloedema–corpulmonale• Unilateraloedema–DVT

Inspection:CHEST:• ‘lookingatthechestanteriorlyandposteriorforanyscars,swelling(sternotomyand

thoracotomy),deformities(e,gpectusexcavatumorpectuscarinatum,kyphosisorscoliosis)’

• Chestwalldeformitieso Pectusexcavatum-sternumisdepressedinrelationtotheribs,o Pectuscarinatum-sternumismoreprominenttotheribso Barrelchest–emphysema/COPD

Palpation:Chestexpansion:

• Anteriorposteriordirection-placebothhandsonthepectoralregionandaskthepatienttotakeadeepbreath-chestshouldexpandsymmetrically

• Laterally-gripthechestbetweenbothhandsandaskthepatienttotakeadeepbreathwhilstobservingmovementofthethumbs

Apexbeat:• shouldbeinthe5thintercostalspaceatthemidclavicularline

JoshuaChambers

• Displacementoftheapexusuallysuggestcardiomegalybutrespiratoryconditionswhichmaycausetheapextobecomedisplacedinclude:Pulmonaryfibrosis,bronchiectasis,pleuraleffusions,pneumothoraxes

Percussion:• Clavicle,midclavicularline,betweentheribs• 4anterioallyand2laterallyEACH

Auscultation:• Askthepatienttobreathinandout–listen4anteriorandposteriorand2laterally

(Midaxillary)FOREACHside.• Listenfordiminishedbreathsounds• Bronchialbreathing• Addedsoundssuchaswheezes,stridororcrackles,orpleuralrubs

Vocalresonance:• Askthepatienttosay99• Increasedinfibrosis,consolidation,collapse

Summary:• Onexaminationofthispatient..• Oninspection..• Onpalpation…• Onauscultation• Clearvesicularbreathsounds• IfIhadmoretimeIwould:

o Doafullcardiovascularexamo LookatCXRo Dothefront/backo BedsidePeakflowo Lookatobschart

Commonconditionsyoumightget:• Chestwalldeformity

o kyphoscoliosis,pectusexcavatum• Post-surgerywithobviousthoracotomyscar• Bronchialbreathingispresentabovetheoedema(Becausethelunghasclumped

together)

SummaryofexaminationfindingsanddiseaseBreathsounds Indicates

Normalvesicularbreathing NormallungsBronchialbreathing Thisisfoundwherelungtissueisreplacedbyuniformlyconducting

tissue.Thisincludes:ConsolidationFibrosisCollapse(withpatentbronchus)

Absentbreathsounds PEPulmonaryeffusionPneumothorax

JoshuaChambers

Whisperingpectoriloquy ConsolidationCollapsewithpatentbronchus

Vocalresonance Consolidation–increasedPE–decreasedPulmonaryeffusion–decreasedPneumothorax–decreased

Crackles Fine–PulmonaryfibrosisandheartfailureCourse–infectionandbronchiectasis

Wheeze AsthmaCOPD

Pleuralrub Inflamedpleura,infection,PE,fracture

ConditionsrelatingtotheirexaminationfindingsCondition General Face/neck Inspection Palpation Percussion AuscultationPneumonia SOB,

fever,tachycardia,cyanosisandhypotension

Flushedorpale

Tachypneic,laboured,reducedexpansion

Tracheanormal

Dull CoursecrackleswithbronchialbreathingandVRandWPincreased.?PleuralrubProminent,mostly,inlowerlobes.

Pleuraleffusion Accessorymuscles,labouredbreathing,looksill

Reducedonside

Tracheaawayiflarge

Stonydull Absentbreathsounds.?Bronchialattopofeffusion.VRreduced

Pneumothorax SOB,pain

?Surgicalemphysema

Reducedexpansiononthatside

Trachealdeviationopposite

Hyper-resonant

Absentornobreathsounds,VRdecreased

Collapse SOB,Tachycardia

Reducedexpansion

Tracheatowardsiflarge

Dull Absentorreduced.?Crackesorwheeze.VFdecreased

ILD ClubbingCyanosis

Clubbing Reducedexpansion

Tracheanormal

Normal Finecrackles?Bronchialbreathing

COPD SOB,oxygen

Accessorymuscles,cyanosisWtloss

Barrelchest Tracheanormal

Normal,hyperresonant

Reducedairentry,(polyphonic)wheeze

Asthma ?SOB Labouredbreathing,shortsentences,accessorymuscles

Hyper-inflationofchest

Tracheanormal

Normal Wheeze

JoshuaChambers

PulmonaryEmbolism

Inpain,cyanosis

SOB,pleuriticpain,signsofDVT,raisedJVP

SOB Normal Normal Absentorreducedbreathingandpleuralrub

Bronchiectasis Reducedexpansion

Reducedpercussion

ReducedairentryCrackleswhichchangewithcoughing

PercussionnoteType Detectedover

Resonant NormallungHyperresonant PneumothoraxDull Pulmonaryconsolidation

PulmonarycollapseSeverepulmonaryfibrosis

Stonydull(Anythingliquid) PleuraleffusionHemothorax

CausesofdiminishedvesicularbreathingReducedconduction

ObesityPluraleffusionorthickeningPneumothorax

ReducedairflowGeneralised.COPDLocalised.Collapsedlungduetooccludinglungcancer

CausesofcracklesPhaseofinspiration Cause

Early Smallairwaydisease,bronchiolitisMiddle PulmonaryoedemaLate Pulmonaryfibrosis(Fine)

Pulmonaryoedema(Medium)BronchialsecretionsinCOPD,pneumonia,lungabscess,tubercularlungcavities(coarse)

Biphasic Bronchiectasis(Also,pulmonaryoedema,ILD,PF,COPD,Pneumonia)

CausesofbronchialbreathsoundsCommon

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Lungconsolidation(Pneumonia)Uncommon

LocalisedpulmonaryfibrosisPleuraleffusionCollapsedlungwheretheunderlyingmajorbronchussoundsareobvious(Oftenpartialcollapse)

Spirometryprocedureandinterpretation:• GooverPFTquizlet• Gooverthepaperdocumentinfolderwiththison

Whatismeasured?• Totalvolumeofairforciblyexpiredafterafullinspiration.(FVC)• Volumeofairthepatientisabletoexpireinthefirstsecondofaforcedexpiration.

(FEV1)• FEV1/FVCratioexpressedasapercentage• Maximumflowachievedfromaforcedexpiration.(PEF)

Indications:

• Abnormalitypresent?• Assessmentofseverity• Serialmeasurements• OccupationalMedicineorEpidemiologicalstudies• Research

Normalvaluesdependupon:

• Age• Sex• Height• Ethnicorigin

Limitationstoflowvolumeloop

• Notspecific• Sensitivity

Whattocheckbeforewedospirometrywithpatients:

• Height,sex,age• Inhalers,whendidyoulastusethem• Shouldn’tbedoingitonpeoplewhohavehadanMIinthepastweek• Thoracicsurgeryinthepast12weeks• Haven’thadapneumothoraxinthepast2weeks• ‘Haveyoubeenaninpatient’• ‘Haveyouhadanyoperationsinthepastfewmonths?’• Otherconditions• Smoker?

JoshuaChambers

• ExplainthenatureandpurposeofthetestMeasurements:

• RVC’s(Relaxedvitalcapacity)–x3• FEV1/FCV–3withgoodtechnique

o 2withina100mlofeachotherBadtechnique:

• Co-ordination• Noleakage• Nocoughing• Nottakingfullbreathin• Gentle–givingaslowblow(misdiagnosedfalsepositiveslookslikeCOPD)• Earlytermination(Lessthan6sec)underestimateFVC,sofalsenegatives

FEV1%predicted:• >80mild• 50-79moderate• 30-49severe• <30verysevere

Obstruction:• ‘Scooping’onthegraph

CalculatingspirometryintheOSCE?

• Youwillbegivensomedatafromapatient(FEV1,FVC,possiblyacoupleofFlow/volumeloopsorvolume/timecurves)

• Youwillneedtocalculatethepatient’sFEV1/FVCratiousingacalculator(calculatorprovided!)

• Youwillneedtofindthepatient’spredictedFEV1onatable• Youwillthenneedtocalculatethepatient’spredictedFEV1%• FEV1/PredictedFEV1• Thensuggestadiagnosis–probablyCOPD• DescribeseveritybasedonNICEguidelines

JoshuaChambers

LearnCOPDseverity:

Describingspirometry:PRACTISETHIS

• Demographic–e.g.age• Quality–e.g.slowstart,takinganextrabreath• Numberofblows• FEV1(%predicted)• FVC(%predicted)• FEV1/FVC• Preandpostdilator• Commentoncurves–e.g.shape,anyanomalies• Diagnosis–e.g.restrictiveorobstructive• Lookatquality

o Ifpatienttooslowblowingout–scooponinspirationo Ortakinganextrabreath

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• DEFINEFEV1andFVC• Asthma

o Diurnal–morethan20%differenceatdifferenttimeso Peakflow

Flowvolumeloops:

• Thesearegraphsconstructedfrommaximalexpiratoryandinspiratorymanoeuvresperformedonaspirometer.

• Theloopismadeupoftwohalves,aboveistheflowoutofairfromthemouthandbelowistheflowofairintothemouth.

• Theshapeoftheloopcanidentifythetypeanddistributionofairwayobstruction.• Whenlookingatthese,lookforthenormalflowvolumeloop–withthetriangle

expiratorycurve,slowingdownoncetotalrespiratoryvolumeisreached.There’sasemi-circularinspiratorycurve

• AnydeviationfromtheshapeofA=pathology• TheFEV1=*• ReducedFEV1anywayindicatesobstructiveairwaysdisease.

Inrestrictivedisease:

• Maximumflowrateisreduced• Totalvolumeexhaledisreduced• Becauseofincreasedlungrecoil–flowrateishighduringthelaterpartofexpiration

Extraphysiologicaldetail:• Inrestrictivedisease(suchaspulmonaryfibrosis,ILD,neuromuscularproblemsor

chestandspinedeformities)there’sarestrictiontolungexpansion.Thereforethere’sareductioninthevitalcapacityinthelungs,resultinginareductioninFVC

JoshuaChambers

• Moreover,asthere’sreducedcomplianceandelasticitythere’sALSOareductionintheFEV1

Inobstructivedisease:• Flowrateislowinrelationtolungvolume• Expirationendsprematurelybecauseofearlyairwaysclosure“Scoopedout

appearance”afterthepoint.Extraphysiologicaldetail:

• Inobstructivedisease(COPD,Asthma,CF,bronchiectasis)there’saresistancetoexpiratoryflow.ThismakesitdifficulttoachieveagoodFEV1

• Thismakestheratiolower,commoninrespiratorydiseaseThegraphsshow:

• A=Normal• B=Restrictivedefect(Phrenicpalsy)• C=Volumedependantobstruction(Asthma)• D=Dependantobstruction(Severeemphysema)• E=Rigidobstruction(Trachealstenosis)

Volumetimegraphs:

• Inanobstructivepicture,thecurvedoesn’tplateau.Youhavetothinkaboutratios–

ifitdoesn’tplateauthenFEV1willbemuchlowerthanFCV,givingarestrictive<70%picture.

• However,withrestrictive,thecurveisjustasmallerversionthannormal.That’swhytheratioremainsthesame.

• Rememberrestrictivedefectsincludeintrathoracicandextrathoracicrestrictions

Peakflowprocedureandinterpretation:Peakflow:Intro:

• Washhands• Introduceself• ConfirmpatientsnameandDOB

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• ‘I’vebeenaskedtoassessyourpeakflowisthatokaywithyou?Explanation:

• Checkpatientsunderstandingofthecondition• ExplainwhymeasuringtheirPEFRisimportantasaguidetohowwell-controlled

theirasthmais• ExplaintothepatientthattheyshouldbecheckingtheirPEFRregularly,particularly

iftheirasthmaisworsethanusual• Thepeakflowmeasuresthemaximumspeedofexpiration(howfastyoucanblow

outalltheairinyourlungs)• Todothisyouwillhavetoblowashardandasfastasyoucanintoatube.

Demographicstoreceive:

• Weight• Height• Ethnicity

Thingstoconsider?

• Havetheyjusttakenaninhaler?• Havetheyjustsmoked?• Havetheyjustdonestrenuousexercise?• Havetheyjusthasabigmeal?

StepsofthePEFRmeasurement:

• DescribethestepsinPEFRmeasurement• Connectacleanmouthpiece• Ensurethemarkerissetto0• Standorsitupright• Holdthemeterhorizontallyandensuretheyarenottouchingthedial• Takeasdeepabreathinasyoucanandholdit• Placethemouthpieceinyourmouthandformastightasealaspossiblearoundit

withyourlips• Breathoutashardandasfastasyoucan(measuresthefirstpuffsotheydonot

needtoexpirefully)• Observeandrecordthereading• Repeat3-4timesandrecordthehighestreading• Notedowntherecordinginadiaryforcomparison• Afterdescribingtheprocesstothepatient,youshouldshowthepatienthowto

performthemeasurement–dothisbymeasuringyourownPEFR• ASKTHEPATIENT,ISTHISALLCLEAR,DOYOUHAVEANYQUESTIONS?REPEATTO

MEBACK• Oncethetechniquehasbeendemonstratedasthepatienttoshowyouhowthey

wouldperformthemeasurementbythemselves.• Makesuretheyaredoingitcorrectlyandresolveanymistakestheymaybemaking

Postprocedure:

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• Askthepatientiftheyhaveanyquestionsorconcerns• Disposeofthemouthpiece• Thankthepatient

Describeorplotagraph:

• Diurnalvariation• Morningdipping• Betterthroughouttheday• ORrecoverfromanasthmaattack,anditgraduallygettingbetter• Orpostbronchodilator–morethan20%difference

Advancedrespiratorytestinterpretation:• Lookatpaperdocforthis

Transferfactor:• Transferfactor(TLCO)isdefinedastheamountofcarbonmonoxidetransferred/min

–correctedfortheconcentrationgradientofCOacrossthealveolarcapillarymembrane.

JoshuaChambers

Whenistransferfactorreduced?• Feweralveolarcapillaries• V/Qmismatches• Reducedaccessiblelungvolumes

Testing:• Gastransferisarelativelysensitivebutnon-specifictest• Itisusefulfordetectingearlydiseaseinlungparenchyma• Transfercoefficient,therefore,isabettertest.• Transfercoefficient(KCO)iscorrectedforlungvolumesandisusefulat

distinguishingcausesoflowTLCOduetolossoflungvolume.• TLCOandKCOarealwayslowinemphysemaandfibrosingalveolitis• TLCOislowbutKCOisnormalinpleuraleffusionsandconsolidation.

Conditionsthataffectthetransferfactor

DecreasedTF IncreasedTFPulmonarycauses Emphysema,lossoflung

tissueanddiffuseinfiltration

PulmonaryHaemorrhage

Cardiovascularcauses Lowcardiacoutput,pulmonaryoedema

Thyrotoxicosis

Othercauses Anaemia Polycythaemia

ABGprocedure:Introduction:

• Washhands• Introduceyourself• ConfirmpatientsnameandDOB• ‘I'vebeenaskedbythedoctortotakeabloodsamplefromyourarteriestodayis

thatokay?’• Explainprocedure• ‘Theprocedurewillinvolvemeputtingasmallneedleintoanarteryintoyourwrist

togetabloodsample.Itshouldn’tbetoouncomfortablebutifyou’dlikemetostopatanypointpleaseletmeknow’

Tocheckfor:• Contraindications

o Clottingdisorders“Anyproblemsinthepast?”o Onanyanticoagulants/warfarin

• Isthepatientonair?o Inspiredair-oxygensats/pao2-aretheyonconstantoxygen?

• Temperatureo canaffectdissociationcurve

• Alan’stesto Tocheckforulnaarteryperfusiono Toensureadequatebloodsupplytothehand

Preparation:

JoshuaChambers

Getequipment:• Gloves• Syringepack• Alcohol• Cottonwool• Sharpsbin

Questionstoask:• Whichisthepreferredarm?• Placethewristinhyperextension• Locatetheradialartery• Offeranaesthetic(2%lidocainesubcut)

Procedure:• Palpateradialartery• Cleanskin• Letthepatientknowyouareabouttoproceedandtoexpectasharpscratch.• Pullbackplungerto0.7(1.5ml)toallowroomforthebloodtofillit• Inserttheneedleat30degreestotheskinatthepointofmaximumpulsationof

theradialartery.• Advancetheneedleuntilarterialbloodflushesintothesyringe.Thearterialpressure

willcausethebloodtofillthesyringe.• Removetheneedle/syringeplacingtheneedleintothebung.Pressfirmlyoverthe

puncturesitewiththegauzetohaltthebleeding.(5secondsthenletthepatientdoit)

• PushoutanyairwithinitandShaketomixanticoagulantsPostprocedure:

• Labelthesamplewiththepatient’sname,DOB,hospitalnumberandinspiredoxygenandsendforanalysis

• Removeyourglovesanddisposethemintheclinicalwastebin.• Disposeofallofthestuffintherelevantbins• Washyourhandsandthankthepatient.

ABGinterpretation:

1. Onairoronoxygen2. Lookatoxygen–type1/2respiratoryfailure?Below8kPa3. LookatthepH,AcidemiaorAlkalemia?4. LookatthePCO2,Isithigh?Thatwouldbeanacidosis.Isitlow?Alkalosis?Ifit

correspondstowhatisinstepone–youknowitsduetorespiratoryabnormality,ifitdoesn’tcorrespond–iepHof7.47andaCO2innormalranges–it’sprobablymetabolic

5. Lookatthebicarb.Isthebicarbhighorlow?Highbicarb–alkalosis.Low–acidosis.6. THINKwhatisoppositetothepH?IftheCO2agreeswiththepHandthebicarbis

opposingthepHitsuggestscompensation7. Ifyouhaveconflictingresultsbetweenametabolicorrespiratoryprimary–lookat

theO2.IftheO2islowitdoesindicatethatthere’srespiratoryfailure…Therefore..leadingyoutobelieveit’sarespiratoryprimary.

JoshuaChambers

Noteoncompensation:

• Compensationisanopposingmechanism• Thebodyneverovercompensates,topushittheotherside• Compensationmaybecompleteorincomplete.Thus,ifit’scompleteitthepHmay

stillbeinnormalranges.Ifit’sincompletethepHwillbeoutsidenormalranges.Type1RespiratoryFailure=paO2<8kPawithnormal/lowpaCO2Type2RespiratoryFailure=paO2<8kPawithhighpaCO2>6.5kPaSteps ResultsFirstlookatthepH <7.35=Acidosis

>7.45=Alkalosis

NextlookatpaCO2-Isitinkeepingwithabove?

pH<7.35andpaCO2>6.0=RespiratoryacidosispH>7.45andpaCO2<4.5=Respiratoryalkalosis

IfpaCO2notinkeepingwithpHthenlikelyitsgoingtobemetabolic

pH<7.35andHCO3-<22=Metabolicacidosis

pH>7.45andHCO3->28=Metabolicalkalosis

Lookforcompensation Respiratorycompensationmayoccurearlywhereasmetaboliccompensationoccursinchronicdisease

InterpretationofABGs–valuestobearinmind

HC03 <21mmoles 21–29mmoles >29mmolesPaC02>6kPa

Respiratory+metabolicacidosis

Respiratoryacidosis Metabolicalkalosis+respiratoryacidosis

PaC024.5–6kPa

Metabolicacidosis Normal Metabolicalkalosis

PaC02<4.4kPa

Metabolicacidosis+respiratoryalkalosis

Respiratoryalkalosis Metabolic+respiratoryalkalosis

Pastandsfor“Pressureintheartery”

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Generalcausesofrespiratoryfailure:Type1:

• It’scausedbyaloworhighV/Qmismatch• LowV/Qcauses:whereareasoflungareperfusedwithdeoxygenatedbloodbynot

ventilatedwithoxygen• HighV/Qcauses:Whereareasofthelungareperfusedwithdeoxygenatedbloodbut

arenitbeingventilated.• ThereasonCO2isnormal,isbecausethenormalpartsofthelungarefreetoblood

offmoreCO2thannormalType2:

• Causedbyalveolarhyperventilation• Thismeansthatoxygencannotgetintothealveoliandcarbondioxidecannotget

out• COPD,restrictivelungdiseaseorneuromusculardiseasecausethis

Oxygentherapy,practicalstuff,prescribingandtypesofmask:FiO2:

• FiO2=fractionofinspiredoxygen• Roomairis21%FiO2• Highflowmaskscangive60%FiO2• CanbehardtotellifPO2isappropriatelyhighforFiO2andwhetheroxygenationis

impaired• Ruleofthumb:ExpectedPO2=FiO2%-10• Example:patientonFiO240%(facemask).ABGshowsPO2of18.8kPa(normal

>10kPa)• IMPAIREDOXYGENATION

TargetsatsforCOPDandnormalpatient:TargetsaturationsforT1/T2respiratoryfailure?

• TypeIIRespiratoryFailure:o 88-92%targetsats.o VenturiessentialinTypeII

• TypeIRespiratoryFailure:o 94-98%targetsatso Assesssatsatleast6hourly

Uncontrolled(variable)performancesystems:Theoxygensuppliedtothepatientwillbeofvariableconcentrationdependingontheflowofoxygenandthepatient’sbreathingpattern.

• ThisiswhenO2requiredtoraisetheSaO2above92%• NoconcernsthehighO2willsupresstheventilatorydrive.

Device Image Flowrates(FiO2)

ConcofOxygenthatcan

bedelivered

Examplesofuse

JoshuaChambers

Nasalcannulae

1-6L/min

approx24-50%

SimpleFaceMaskAlsoreferredtoas:• MCMask• MediumConcentration

Mask• MaryCatterallMask• HudsonMask

6-10L/min

Flowratemust

beatleast5

L/mintoavoidCO2re-

breathing

approx40-60%

ReservoirMask(NonRe-breathingMask)

• Deliverthehighestflowoxygentosomeoneinhospital

• Reallysickpatients• 15L–MAXoxygen

10-15LminReservoir

mustbefilledcorrectlybefore

administration

approx60-90%

Short-termuseTraumaEmergencyCriticalillnessPostcardiac/respiratoryarrest

Controlled(fixed)performancesystemsWillgiveanaccurateconcentrationofoxygentothepatientregardlessofthepatientsbreathingpatternandflowofoxygen(providingtheminimumsuggestedflowrateasshownontheVenturivalveisused)

• ControlledusewithextraO2isrequired.• However,it’sCONTROLLEDasventilationrequiresthehypoxicdrive• ThereforePaO2mustnotgoabove8kpa(BasicallyoutofT2respiratoryfailure)

VenturiMasks• O2isdirectedthrough

anarrownozzleandexitsatspeed.

• Thisdrawsinairanddilutestheoxygen

• ItmixesairandO2atthesameratioregardlessofflow

Asper

instructiononVenturivalve

24-60%

Patientsatriskofhypercapnicrespiratoryfailure(egCOPD)

TracheostomyMask

OxygenMUSTbehumidified

24-70%

Patientswithtracheostomyorlaryngectomy

Oxygentherapy:

JoshuaChambers

OxygentherapyreviewTypeofoxygentherapy Aims IndicationsLTOT–Longtermoxygentherapy PatientNEEDSoxygen

LongtermhypoxiaAtleast15hoursIdeally18-20Toreducelongtermcomplicationsofchronichypoxiasuchascorpulmonale(LTOT)

PaO2lessthen7.3(Hypoxicinastablestate)Lessthan7.3Kpaon2occasions,3weeksapartwhenstableOR7.3-8IF…Secondarypolycythaemia,nocturnalhypoxemiaandcorpulmonaleNOTinacuteexacerbationABGinoutpatients,lessthan7.3–doagainin2weeks,confirmandthenstartLTOT

Ambulatoryoxygentherapy AllpatientsonLTOTExercisedesaturation

ExercisedesaturationIeatrest–O294-95%...butifyoudoa6minwalktestitdropssuddenlyNEEDtodemonstratethepatientsgetbenefitwithoxygenMakethepatientwalk,without,withplaceboandwithoxygen–supposedtogiveambulatoryoxygen

SBOT:Shortburstoxygentherapy SevereSOBandunresponsivetoothermeasuresThus,theirPaO2isfineallthetimebuttheyfeelREALLYbreathlessPlaceboornot–itkeepspeopleawayfromhospital

Oxygenalertcard:

• ThisshouldbegiventoallpatientswithapreviousHxofhypercapnia/respiratoryfailure

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Prescription:• Oxygenshouldbeprescribedonthedesignatedsectionofthedrugcharttoachievea

targetoxygensaturationof94-98%formostacutelyillpatientsor88-92%forthoseatriskofhypercapnicrespiratoryfailure.

• Forsomepatientsitmaybeappropriatetospecifyadifferenttargetrange.• Alloxygenshouldbeprescribedexceptinanemergency(peri-arrestorcriticallyill)when

itshouldbestartedimmediatelyusingamaskwithreservoirbagat15L/minanddocumentedlaterinthepatientsrecord.

CXRandCTreportsChestX-ray:

• First–READTHESCENARIO.Thiswillgiveyouclues• Demographics:–Name–DOB–DateTaken–View(AP/PA/lateral)–“Thisisa

plainfilmchestradiograph,PAview,takenof………..,DOB10/06/1941.Itwastakenon15/11/2014…”

• BrieflyrunthroughqualityofCXR(RIPE)o Inclusion/Exposure–bothcostophrenicangles,bothapiceso Rotation–symmetryofclavicleso Inspiration–5-7anteriorribso Penetration–seethoracicvertebraethroughheart

• WorkthroughrestoftheCXR:o A-Airwaysincludingthehilao B-Bonesandsofttissueo C-Cardiacsilhouette,sizeandmediastinumo D-Diaphragm,costophrenicanglesandhemidiaphragmso E-Effusionsandpleurao F-Lung'fields‘

• Checkpleuraandlungedgeforpleuraleffusionandpneumothorax• Lines,drainsetc..E.g.chestdrain,centralline• KerleyBlines=Pulmonaryoedema

o Usuallyfoundatthelungbases• Anyforeignbodies,ECGleads,endotrachealtubes,pacemakers• STATETHEOBVIOUSFINDINGS

Extras:• Opacity=white

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• Hypo(dark)/hyper(white)density• LateralCXR–drawthehorizontalandtransversefissuresofthelung–knowthe

surfacemanagementHowtodescribealesion?

• Whereisit• Howbigisit?(Tennisball,5pcoin,10pcoin)• Whatisit’sshape?• Boarderwellorpoorlydemarcated?• DESCRIBEwhatitlookslike–fluffy,homogenous,heterogenous?)• Presenceofanairfluidlevel?• Awhitefluffyzonearoundalesionisoftensclerotic

Howtodescribeanopacity:

• Whereisit?• Whatzoneisit?• Doesitcoveranyboarders?(Indicatingalobe)• DESCRIBEWHATYOUSEE,fluffy,homogenous,hetrogenous…etc..

Commonpathologiestocomeup(Knowthemanagementofthese!)

• Pneumonia:consolidation,airbronchograms,identifylobes,parapneumoniaeffusion

• PleuralEffusions:bluntingofcostophrenicangle,homogenouswhiteout,mediastinalshiftaway

• Pneumothorax:mediastinalshifttowards(unlesstension),pleuralline,lossoflungmarkings

• Pulmonaryoedema:batwingappearance,septallines,venoushypertension,smallbilateralpleuraleffusions

• Collapse:mediastinalshifttowards,increaseddensitywithoutairbronchograms,identifylobes

• Fibrosis–thisisclassifiedasupper,middleorlowerzones–andcanbespreadoutallaround…Itgivesthoseweirdlinedappearances..

• KNOWWHERETHEFISSURESAREBOTHONAPANDLATERALThingstoconsiderfortheOSCE:

• Atfirst,untiltoldto,don’tbespecific!Say“Opacity”insteadofconsolidation• Insteadof“Cavity”say“Lesion”,asthisislessspecific.• USEZONESinsteadoflobes• ALWAYScheckifit’sAP/PA• AlwaysrelateCXRtotheclinicalpicture…• InbonesREALLYLOOKFOR#orchunkmissing-becauseoftentheremaybea

pneumothorax!• Forany?consolidation-look

Specificsforcollapse:(+generalcollapsefindings)

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• Upperlobecollapse–subtlebecausethelowerlobecompensateso Oftendemarcatedbythehorizontalfissureo Thelungbecomessmallero Mediastinalshiftoccurso Diaphragmgoesupo Tofindoutwherethecollapseis–lookforshady/hazyshadowingandthisindicatesasto

whereitis.o Canyouseethroughtheheart?Ifnot?Leftlowerlobecollapseo Looktoseeifthehilahasmovedupordowno Veillikeappearancehereiscommon

• Leftlowerlobecollapseo Tocardiacleftboarders‘Sailsign’o Canlooklikecardiomegaly

• Leftupperlobecollapseo Vaillikeopacityo Also,retentionoftheheartboarder

• Rightupperlobecollapseo Somethingdodgeisgoingonupinthatcornerasthelungfoldsinonitselfo AlthoughthisCANlooklikeabronchogeniccarcinoma

• Rightmiddlelobecollapse:o Oftenamassorevenaverywelldefined,sharptrianglejuttingoutofthemediastinum

• Rightlowerlobecollapse:o Quiteaclearsailsortontherightsidecoveringthecosto-diaphragmaticangle.

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Prescribing(oxygen),inhalersandnebulisers:Inhalers:Typesofinhaler:

• Nebulisero Drivinggaso Forathomeuseo Onlyforuseinpatientswho’sbreathingissolabouredthatcoordination

wouldbeimpossibleo Mostclinicalscenariosuseaspacerinstead.

• Metereddoseinhalero Pressurisedincanister

• Drypowderinhalero Inspirationo Notgoodwithpeoplewhoworkinwetdampenvironments

Techniquedependingontype:

• DPI=quickanddeepfromthestart• MDI/aerosol=Breatheinslowlyandsteadily• Mostinhalersarequickanddeep.

TakinganMDI:

• Checktheexp.Date• Checkthecapsoff• Checkforanyforeignbodies• Shake• Breathout• Sealaroundcap• Pressdownonce• Slowandsteady• Holdbreathandwaitfor10seconds

MDIwithspacer:• Same• Breatheout• Pressit• 4-5tidalbreaths–slowandgentle• (Reducesoralthrushasitdoesn’thitthemouthasfast)

Whyarespacerssogood?

• Co-ordinationo Delayininspirationo Itgivesusalittletimetogetitallin

• Lessoropharyngealdeposition• Improvedlungdelivery

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CPAPandBiPAP:TypeofpatientwithCPAP:Type1

• OSAo Stentingopentheupperairways

• Pulmonaryoedemao Shorttermthingtoenablethemedicalmanagementtokickin(Ie

diuretics/nitrites)• Pneumonias

o Affectingpressuregradiento Can’tventilateo HIGHFLOW(oxygen)ratherthansomethingtosplintthemopen

TypeofpatientonBIPAP:Type2

• COPD• Patientsintype1thatgettired,andunderventilate• Bronchiectasis• Chestwallissues

o Abnormalventilation• Obesity

o Fat• Neuromuscularconditions• Headinjuries/opiates/postsurgery

Inhalertechniqueandinformationgiving:Introduction:

• Introduceyourself.• Washhands.• Confirmpatientdetails–name/DOB• Checkpatient’sunderstandingoftheirinhaler–allowingyoutotailoryour

explanationtothepatient’slevelofknowledge.Explanation:

• Explainwhattheinhalerdeviceis• Youhavebeenstartedon….(nameofinhaler)…foryourasthma/COPD“–Showthe

patienttheinhalerdeviceExplainingdifferenttypesofinhaler:Preventer:

• Forexample,ICSbeclomethasone(Brown)• (Name of inhaler) is a preventer – it helps to reduce the swelling in the airways and

stopping them from being so sensitive. You use this to lower the risk of severe attacks. I would like you to inhale …(x puff(s))…(x time(s) a day)…everyday. It’s really important that you don’t miss doses, as regular use is key to keeping your asthma/COPD under control” – Remind the patient to rinse mouth after use if the inhaler contains a steroid due to risk of oral candidiasis.

Reliever:• Forexample,Salbutamol(Blue)

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• (Name of inhaler) is a reliever. This is useful to help relieve immediate wheezing/asthma attacks. It works by relaxing the airways so that you can breathe more easily. You shouldn’t need this more than 3 times a week if your asthma is well controlled. Ask your GP for a review if you are using this more frequently. I would like you to inhale (x puff(s)) when you feel short of breath.

SMART/MARTtherapy:• (Symbicort Maintenance and Reliever Therapy)regime

“Symbicort is used as both a preventer and a reliever. You need to use this regularly …(x puff(s))…twice a day to prevent symptoms and …(x puff(s))…each time you have an attack.” – Remind the patient to rinse mouth after use due to risk of oral candidiasis.

ASKTHEPATIENTTOSUMMARISEKEYPOINTSBACKTOYOUDemonstration:1.Preparetheinhaler–Takeoffthelid/ShakeifMDI/Insertcapsuleifhandihaler2.Loadthedose–pressbuttontopuncturecapsuleifhandihaler/pressleveronceifaccuhaler/twistbottomifturbohaler3.Breatheoutgentlyasfarasiscomfortable.4.Tightlyseallipsaroundthemouthpiece.5.Breathein:

• Drypowderinhalers(DPI)needstobebreathedinquickanddeep• Metereddoseinhalers(MDI)needstobebreathedinslowanddeep• Softmistinhalers(SMI)needstobebreathedinslowanddeep

6.Removeinhalerfrommouth,holdbreathforaslongasiscomfortable.7.Repeatprocedureasdirected.Observeandassess:

• Askthepatienttocarryouttheprocedurethemselveswhilstyouobserve• Mostpatientswillrequiretweaking.• Pointoutthepositives…“youaredoingX&Yverywell“…thenintroduceroomfor

improvement…”butdoingA&Bmayhelpyourinhalersworkmoreeffectivelyforyou“

• DEMONSTRATE>OBSERVE>FINETUNE>REPEATASNECESSARYSpacerdevises:

• Spacersareusedtoimprovedrugdepositiontothelungsinpatientswhocannotmastertheiraerosolinhalertechnique.Theyareusefulinreducingsideeffectsofhighdoseinhaledcorticosteroidsbyreducingtheamountofdrugswallowedandabsorbedintothebody.CommonlyusedspacersareVolumaticandAeroChamber.

1.Prepareinhaler(shakeaerosolinhaler).2.Attachinhalermouthpiecetothespacerdevice.3.Breatheoutgentlyasfarasiscomfortable.4.Lipssealaroundthespacermouthpiece.5.Release1doseintothespacerdevice.6.Breatheinandoutthroughthespacermouthpieceseveraltimes.7.Administerseconddoseifneededandfinish.

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• Thespacerdeviceshouldbewashedwithdetergent(washingupliquidisfine)onceamonthandleavetoair-dry.Itshouldneverbewipeddryasthiscancausestaticwithinthedeviceanddrugparticleswillsticktosidesofthespacerasaresult.Spacersshouldbereplacedatleastonceayear.

Closingtheconsultation:

• Askifthepatienthasanyquestionsorconcerns–ensureyouaddressthese• Provideinformationleafletifavailable.• Advisethepatienttogetintouchshouldtheyhaveanymorequestionsorconcerns.• Thankpatient.• Washhands.

SleepstudiesTypes:

• Overnightpulseoximetry• Limitedpolysomnography• Fullpolysomnography• Actigraphy

CXR:

• Lookforairbronchograms• Lookforonething,lookforsomethingelse• Bilaterallymphadenopathycausedbylymphoma• Pleuralplaques–asbestosis• Multiplelungmetsinbothlungs

o Renalo Melanomao Ovarian

• FULLWHITEOUT:pleuraleffusion(butlookfortrachea)pneumonectomyandfulllongcollapse(Inacavity–fillswithfluid)

• Surgicalemphysema–lookup–looksstreakfromtheoutside• Leftlowerlobecollapse–CTindicatedasit’smostcommonlycausedbyatuourof

theleftlowerbronchus• Pneuothorax• COLLAPSE:CTindiated,orbronchoscopylookforcause(Mucousplug,tumouretc..)• Tumourinlungapex–candamagephrenicnerveandcausediaphragmisraised• Welldefinedpneumoniawithinalobe–lobar/roundpneumonia• Smallandfairlywelldefined–CANCER–goforCTand/orbiopsy• TRAUMA–Pneumohaemothorax(Orhydropneumothorax)becausetheairpushes

downtheeffusion• Ifwhiteopacitywithnomeniscus–think,infectionconsolidation• Middlewhiteopacitythatlookslikemiddlelobeconsolidationisacavitywith

infectionandairfluidlevel• CANgetsailsignwithrightlowerlobecollapse–lookforheartboarderunderthe

effusion!!Ifwelldefined

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• LOOKFORNGtubegoingintotheleftlung• Don’tcommentoncardiomegaly–AP• IFTRIAGNLEOPACITYFROMRIGHTHEARTBOARDER–middlelobeconsolidationor

collapse• Theringshadowsinbronchiectasisarebronchioles