Exam 1 Flashcards
Pt comes in with neck trauma, how do you open their airway?
Jaw thrust
What type of airway do you use in an obtunded Pt?
Oropharyngeal
How do you determine size of orotracheal tube in a kid?
(Age + 16)/4
What is rapid sequence intubation?
Uses paralysis + sedation to intubate pt
DON’T use if difficult/distorted airway
You need to RSI, & Pt is an asthatic, which sedation should you use?
Ketamine - relaxes bronchial smooth muscle
Sedation meds
- Fentanyl
- Midazolam
- Etomidate
- Propofol
- Ketamine - good for asthma
Paralysis meds
- Succinylcholine
2. Vecuronium
Causes of failure to oxygenate/ventilate?
- Mechanical failure
- Tension pneumo
- ARDS
- CHF
If you can palpate a radial pulse, what must SBP at least be?
> 80
If you can palpate a femoral pulse, what must SBP at least be?
> 70
If you can palpate a carotid pulse, what must SBP at least be?
> 60
How much cardiac output does chest compressions provide?
25-30%
What is the only intervention consistently proven to improve outcome in cardiac arrest?
Defibrillation
When do you use electrical pacing?
- Refractory tachycardia
- Torsades
- Unstable bradycardia
MCC sudden cardiac death?
CAD - MI
When does sudden cardiac death usually occur?
Morning
MC in winter, home, males 50-75
Beta-blockers protective
Which arrhythmias usually cause sudden cardiac death?
Pulseless VT or VF
What factors inc. your chance of survival if you go into VF?
- Witnessed collapse
- Prompt CPR
- Early defibrillation
- Younger
- Arrest occurring away from home
- Initial rhythm was VF/VT
What is bradyasystole?
Vent rate <60 &/or periods of asystole
Rarely survives
The SA node experienced ischemia/infarction…what rhythm would you typically see?
Bradycardia or asystole
The AV node experienced ischemia/infarction…what rhythm would you typically see?
AV block
Risk factors for sudden cardiac death in adults >35y/o
- Age
- Male
- CAD
- Cardiomegaly w/ LVH
- Impaired LV function, EF<30%, CHF
- Long QT
- Vent. arrhythmias
Is coarse or fine VF better?
Coarse
What is shock?
Circulatory insufficiency that creates imbalance btwn tissue Ox supply & demand
Causes anaerobic metabolism which creates lactic acid
Causes of lactic acidosis
- Inc. oxygen demand - Status epilepticus
2. Impaired tissue Ox use - septic shock, postresuscitation phase of cardiac arrest
Dx SIRS
Systemic Infammatory Response Syndrome - from shock
Need 2 or more
1. Temp >100.4 or 90bpm
3. RR >20
4. WBC >12 or <4 or 10% immature forms or bands
Classification of shock
- Hypovolemic
- Cardiogenic
- Obstructive
- Distributive
Tx shock
Airway Breathing Circulation Delivery of Ox End points of resuscitation
When do you use vasopressors & name them
When volume resuscitation not adequate or contraindicated (cardiogenic shock)
- Dopamine
- NE
- Phenylephrine
- Vasopressin
- Epi
- Dobutamine
Risk factors for maternal death
- Maternal age
- Inc. live birth order
- Lack of prenatal care
- Unwed mother
What are the leading causes of maternal death?
- PE
- Hemorrhage
- Pregnancy-induced HTN
- Infection
When shouldn’t you use a femoral vein for IV access in a pregnant woman?
> 20 wks
Uterus compresses IVC
What position should a pregnant lady be in if you’re intubating?
Supine but elevate R hip to prevent vascular compression
When is the fetus viable?
22-26 wks
If a pregnant lady goes into cardiac arrest, what should you do?
Tilt Pt
C-section if baby >20wks after 5 min
Open chest CPR after 15 min
Pregnant lady gets PE, what tests should you do?
CT b/c D-dimer inc. w/ pregnancy
Tx w/ Heparin
What is the MCC of global brain ischemia in adults?
VF/VT
What is the MCC of global brain ischemia in kids?
Asphyxia
When should you induce therapeutic hypothermia?
Pts who remain in coma after resuscitation from arrest
- Reduces neuronal cell death
- Beneficial to heart, lungs, kidneys & intestines
ROSC 34 C
Contraindications of therapeutic hypothermia
- Trauma
- Sepsis
- Advanced dementia
- Active bleeding
- CA w/ brain mets
- DNR
What temp do you cool Pt to in therapeutic hypothermia?
33 C
Cool for 24h then rewarm over 24h
Name some opiates
- Morphine
- Hydromorphone
- Fentanyl
- Meperidine
- Oxycodone
- Hydrocodone
- Codeine
- Tramadol
Name some opiate agonists-antagonists
- Buprenorphine
- Butorphanol
- Nalbuphine
- Pentazocine
Contraindications to propofol
Egg or soy protein allergy
Which sedative has a risk of myoclonic jerking?
Etomidate - amnestic not analgesic
Visceral pain fibers
Sensation from heart, blood vessels, pericardium, lungs & esophagus
Pain poorly localized, dull, heavy or achy
Somatic pain fibers
Sensation from pleura, peritoneum, muscle, skeleton & skin
Pain well localized & sharp
Referred pain
Visceral pain signals perceived in somatic structures - arms, neck & jaw
Factors that inc. likelihood of acute MI
- Radiation to R arm/shoulder***
- Radiation to both arms/shoulders
- Worse w/ exertion
- Radiation to L arm
- Diaphoresis
- N&V
- Worse than previous angina/similar to previous MI
- Pressure
Factors that dec. likelihood of acute MI
- Pleuritic
- Positional
- Sharp
- Reproducible w/ palpation
- Inframammary location
- Not exertional
What is costochondritis & S/S?
Inflammation of costal cartilage
Sharp, dull &/or worse w/ breathing
What is xiphodynia?
Sharp pain at xyphoid
Troponin is elevated, but no MI, what could it be?
- Tachyarrhythmias
- LVH
- Myocarditis
- Pericarditis
- Cardiac contusion
- HF
- PE
- Sepsis
What influences coronary artery blood flow?
Duration of diastolic relaxation of the heart, coronary vascular resistance
Tx STEMI
PCI w/in 90mins or Fibrinolysis w/in 30 min
Antiplatelets, antithrombins, beta-agonists, nitrates
Absolute contraindications to fibrinolytics
- Prior intracranial hemorrhage
- Known structural cerebral vascular lesion (ex. AV malformation)
- Known intracranial CA
- Ischemic stroke w/in 3 mo
- Active internal bleeding
- Suspected aortic dissection/pericarditis
When would you use a glycoprotein IIb/IIIa inhibitor with an MI?
with PCI
- Abciximab
- Eptifibatide
- Tirofiban
When should you use caution with nitrates?
Inferior MI - nitrates dec. preload & may cause HOTN due to RV involvement
Do not use w/in 24h of Viagra or 48h of tadalafil use
You should start oral beta-blockers in MI Pts unless…
- Signs of HF
- Low cardiac output
- Inc. risk for cardiogenic shock
- Prolonged PR, 2/3rd degree heart block, active asthma, reactive airway disease
STEMI from crack…what is the Tx?
Get EKG, Troponin
- Aspirin
- Nitrates
- Benzos
- PCI
DO NOT use beta-blockers - will inc. BP
Define cardiogenic shock
Dec. cardiac output leading to inadequate tissue perfusion despite adequate or excessive circulating volume (pump problem)
Risk factors for cardiogenic shock
- Old
- Female
- Acute/prior ischemic event
- PMH
- CHF
- Diabetes
MCC of cardiogenic shock?
Large MI
S/S Cardiogenic shock
Hypoperfusion
- AMS
- Dec. urine output
- Ashen/cyanotic, cool skin, mottled extremities, weak pulses
- Weak pulses due to sympathetic nervous system
- HOTN
- Sinus tachycardia
- Tachypnea
- JVD
- Rales
- Loud/new systolic murmur
- Cardiac PMI moved
Tx cardiogenic shock
- PCI usually
- Correct hypoxia, hypovolemia, rhythm disturbances, electrolyte abnormalities, acid base abnormalities
- Foley-cath to monitor output
Tx cardiogenic shock + MI
Tx same way as w/o shock except
- No NTG if SBP <90
- No beta-blockers for Pts in shock or at risk for shock
MCC HF & Pulmonary edema
- Myocardial ischemia
- Cardiomyopathy
- HTN
- Cardiac dysrhythmias
- Noncompliance
What is normal ejection fraction?
60%
Describe systolic dysfunction
- EF <40%
- Impaired contractility - difficulty ejecting blood
- Leads to inc. intracardiac volumes & pressures, pulm. congestion & edema
Describe diastolic dysfunction
- EF normal/higher
- Impaired vent relaxation - difficulty receiving blood
- Atrial pressures inc.
inc. w/ age, women
Often due to chronic HTN & LVH, sometimes CAD
CXR - L-sided CHF
- Cardiomegaly
- Interstitial edema
- Effusions
- Kerley B lines
- Cephalization
- Bat wing pattern
BNP in chronic HF?
always inc. - but change of 40% from baseline = acute exacerbation
MC precipitants of acute HF syndrome
- Noncompliance - excess salt, meds
- Raid AFib
- Acute MI
- Renal failure
Tx HTN HF
- O2, SL NTG
- BP >150/100 - add IV NTG/nitroprusside
- IV diuretic - furosemide
- If severe dyspnea - begin BiPAP
Admit PRN
When should you avoid nitrates w/ HF?
- RV infarction
- Aortic stenosis
- Volume depletion
- Hypertrophic cardiomyopathy
Tx HOTN HF
SBP<90
1. Inotrope - dobutamine/dopamine until SBP 90-100
Admit - may need vasodilator
Drugs to avoid in HF
- CCB
- NSAIDs
- Antiarrythmics - quinidine, procainamide
Tx bradyarrhythmias
Only Tx if hypoperfusion or risk of AV block
1. TransQ pacing at 100
May need sedation w/ narcotics/benzos
Tx regular stable narrow tachyarrhythmias
- Vagal maneuvers
- Adenosine
Tx underlying cause
Tx irregular stable narrow tachyarrhythmias
- Control rate - diltiazem or beta-blockers
Tx underlying cause
Tx regular stable wide tachyarrhythmias
If VT - amiodarone
Consider synch. cardioversion
SVT - adenosine
Tx irregular stable wide tachyarrythmias
If WPW w/ AF - amiodarone/procainamide
If Torsades - Mg
If VT - synch. cardioversion
If defibrillator Pt is in cardiac arrest, how many shocks have they already had?
4
When a Pt presents to the ED, at what time are their BP measurements most representative?
60-80 mins
MCC hypertensive urgencies?
Noncompliance w/ meds
Tx hypertensive urgency
Reduce BP w/in 24-48h
Commonly use Clonidine