Acute resuscitation OSCE's Flashcards
General approach to Adult Cardiac Arrest?
Initial
- Declare cardiac arrest and call code blue
- Attach defibrillator and monitoring
- Start CPR at ratio 30:2
- Fast: CPR 100-120 compressions per minute
- Hard: Lower half of the chest to 1/3rd depth of the chest (or 5cm)
- Use BVM
VF/VT
- Immediate shock
- Adrenaline after 2nd shock
- Amiodarone after 3rd sjock
- Adrenaline every 3-5mins (every 2nd shock) thereafter
- Consider Lidocaine
PEA/Asystole
- Immediate Adrenaline
- Adrenaline every 3-5mins (every 2nd cycle) thereafter
- Seek and treat reversible causes
Airway
- If hypoxic cause of arrest or issues with ventilation (ie bronchospasm or angioedema) then ETT is indicated
- If above not present then BV< is considered adequate as ETT placement in arrest has high rates of misplacement and interrupts CPR
- SGA’s have theoretical benefits but are unproven, not helpful in severe bronchospasm
- Once advanced airway in place change ventilation to 6-10/min and do continuous CPR
General approach to Paediatric cardiac arrest?
Initial
- Declare cardiac arrest and call paediatric code blue
- Attach defibrillator and monitoring
- Give 2 rescue breaths
- Start CPR at ratio 15:2
- Fast: CPR 100-120 compressions per minute
- Hard: Lower half of the chest to 1/3rd depth of the chest (or 5cm)
- Use BVM to deliver 100% 02, be careful not to overinflat
- Consider use of Ayers T-Piece if available to guide positive pressure delivered
Differences to Adults
- Most likely causes of arrest are hypoxia and hypovolaemia
- More likely to be non-shockable
- Higher priority to secure the airway for improved oxygenation (LMA or ETT)
- 6Hs and 5T’s
VF/VT
- Immediate shock 4J/kg
- Adrenaline 10mcg/kg after 2nd shock
- Amiodarone 5mg/kg after 3rd shock
- Adrenaline every 3-5mins (every 2nd shock) thereafter
- Consider Lidocaine 1-1.5mg/kg
PEA/Asystole
- Immediate Adrenaline 10mcg/kg
- Adrenaline every 3-5mins (every 2nd cycle) thereafter
- Seek and treat reversible causes
General approach to Newborn cardiac arrest?
Indications
- NeoResus only indicated in the peri-birth period, unclear exact cut off but >4-6hrs should change to paeds ALS
Equipment (see pic)
- Resuscitaire and warmer
- Neopuff and/or neonatal BVM at 20 IPAP and 8 PEEP
- Consider higher IPAP for initial breaths of 30cmH20 or higher to overcome atelectasis and lung fluid
- ETT uncuffed 3.0, 3.5 and 4.0
- size 1 LMA (2 - 5kg baby)
- size 0 and 1 miller blades, V/L size 1/0 Mac blade
- introducer, mec aspirator
- 10mcg/kg Adrenaline (30-50mcg)
- N. Saline, 10% dextrose and PRBC
- Umbilical line, 24g cannula, pink intraosseous needle
Steps for compromised baby
- Warm, briskly stimulate and dry the baby
- If preterm place in polyethylene bag and dry head/stimulate through bag
- If inadequate respiration then place in neutral position, may also jaw thrust/chin lift and put towel under shoulders
- Only suction airway if obvious evidence of obstruction
- Trial CPAP (PEEP) at 5cm/H20
- If insufficient add PPV (IPAP) 30cm/H20 at a rate of 40-60 breaths per minute
- Use room air at 21% 02 initially, max 30% 02 if sats failing to respond
- If requiring CPR switch to 100% 02
Neonatal CPR
- Indicated if HR <60 despite good assisted ventilation for >30secs
- 2 thumbs adjacent to each other over the lower 1/3rd of the sternum, with fingers around the thorax to support the back
- Compress chest 1/3rd of the anterior-posterior diameter
- Ratio of 3 compressions to 1 breath, 1/2 second pause to deliver breath
- 3:1 ratio delivers 90 compressions per minute
- If intubated can consider 120 compressions per minute with no break for ventilation (ie simultaneous) with 40 breaths per minute
- Still doing 2 minute cycles
Special points
- Any compromised baby should have their cord clamped ASAP, a low SVR placenta attached will render CPR ineffective
- If the neopuff flow rate is 10L/min (usual initial setting), then 30% Fi02 will be done with 9L/min air to 1L/min of 100% 02
- Once intubated the ETT will be placed at 8-9cm at the lips (Age/2 + 12 for older kids, not applicable here)
Approach to Angioedema?
Angioedema with Urticaria DDx
- Anaphlayxis 90%
- Infection, autoimmune disease, idiopathic, pseudoallergic
- Treat with Adrenaline 10mcg/kg IM +/- adrenaline infusion (mainly for allergic causes)
- Hydrocortisone IV 4mg/kg or Dexamethasone 0.6mg/kg IV
- Consider emergent airway control +/- FONA
Angioedema NO Urticaria DDx
- Hereditary angioedema (most commonly C1-inhibtor deficiency)
- Acquired C1 deficiency (malignancy, autoimmune)
- Drug induced (ACE-I and NSAID induced Angioedema)
- Upper airway trauma or infection (ie recent ENT surgery or dental procedures/infection)
- Idiopathic angioedema
- Upper airway contact dermatitis
- Malignancy (ie Superior vena cava syndrome)
History
- Rash vs no rash
- GIT/NV symptoms
- Wheeze and pre-syncopal Sx
- Recent exposure to allergen
- PHX of swelling or allergy
- FHx of C1-inhibitor deficiency
- New medications
- Liver/Kidney/Heart (generalised oedema)
Tests
- Mast cell Tryptase
- C1 inhibitor concentration and function
- Inflammatory markers
Angioedema NO rash Mx
- ADRENALINE does NOT HELP
- ICATIBANT subcut 30mg (bradykinin receptor antagonist, usually patient will take prior to coming in)
- TXA 15mg/kg PO TDS, home medication
- C1 inhibitor concentrate (BERINERT, 25U/Kg IV, hospital medication)
- Fresh frozen plasma (2 units of 15ml/kg IV every 2-4hrs, contains C1 inhibitor)
- Ecallantide 30mg Sub cut (Kallikrein inhibitor)
- If in a rural area without access to above treatments (excluding FFP) consider early prophylactic intubation if airway involvement (awake oral or fibreoptic, mark neck for FONA)
Approach to the seriously unwell Pregnant patient
General Resus
- Aortocaval decompression (uterus to the left)
- CTG and consideration of emergent cesarean section
- Early Saline and Noradrenaline
- Consider peripartum cardiomyopathy
- Early discussion with NICU, anaesthetics and ICU
- HF nasal cannula vs BiPAP
Cardiac arrest causes
- Underlying cardiac disease
- PE
- Amniotic fluid embolism
- Haemorrhage
- Sepsis
- Hypertensive disorders
- Poisoning/self harm
- Any normal cause
Cardiac arrest management
- Standard ACLS management
- Aortocaval decompression (manually displace urterus to left, left lateral tilt 15-30 degrees)
- Prepare for resuscitative hysterotomy
General approach to starting ECMO?
General Indications
- Pulmonary +/- Cardiac failure
- Condition ir reversible
- OR transplantation is an option
- All other options have been exhausted or are likely to be futile
Neonatal indications
- Severe Mec aspiration
- Persistent foetal circulation
- Large congenital diaphragmatic hernia
- Severe pulmonary HTN
- Bronchiolitis
- Selected congenital HD’s
Specific Pathologies VV
- Status asthmaticus
- Large PE
- Traumatic pulmonary contusion
- Pneumonia/ARDS
- Post drowning
Specific pathologies VA
- Myocarditis
- Hypothermia
- Beta blocker/CCB overdose
- VT storm/intractable dysrhythmia
- E-CPR
Differences VA and VV
- VV only provides Gas exchange (+ dialysis and heat exchange)
- VA adds on cardiovascular support
- VA higher risk of limb ischaemia and thromboembolism
Approach to the Critical Asthma?
- Escalation of therapies
- Identification of complications (tension pneumothorax, salbutamol toxicity, arrhythmias etc)
- Exclusion of alternate causes (APO, pneumonia, pneumothorax, PE etc)
Approach to intubation
- Try not to intubate!
- Recognise high likelihood to arrest on induction
- Adrenaline infusion and IV bolus 20ml/kg prior to induction
- Consider delayed sequence with NIV
- BVM 100% with NP15L/min underneath if/when apnoeic
- Induction with 1mg/kg IV Ketamine, 1.6mg/kg IV Rocuronium
Cardiac arrest causes
- Terminal hypoxia from bronchospams and mucous plugging
- Arrhythmias from eletrolyte disturbance, hypoxia and adrenergic agents
- Dynamic hyperinflation (Auto-PEEP)
- Tension pneumothorax
Cardiac arrest alterations
- Follow standard resus guidelines considering the above
- Consider co-existing anaphylaxis
- Consider early endotracheal intubation
- If dynamic hyperinflation suspected then consider disconnecting tube with pressure ant-post and lateral chest wall followed by period apnoea (ie no breaths every 30 compressions)
Ventilator Settings
- PEEP is controversial, concerns about worsening iPEEP but also splinting open airways with ePEEP can help lower iPEEP
- Start Fi02 1.0, but can titrate down later to sats >90%
- Use expiratory hold to measure end expiratory pressure and subtract the extrinsic PEEP from this to get the iPEEP (aim iPEEP <10cmH20)
- TV 6ml/kg
- Permissive hypercapnoea aiming pH >7.2 and CO2 <80
- in line MDI for bronchodilators
- RR 8-12, closer to 8 if critical
- Combined TV and RR to a minute volume (MV) <115ml/kg/min
- short inspiratory/long expiratory time with I:E ratio 1:4 or greater
- High inspiratory pressure limit, pressure might be high but accept plateau pressure to 30 (measure with inspiratory hold maneuver)
- Higher inspiratory flow rates approx 60 - 80L/min
- Paralysis bolus/infusions
- Deep sedation
- Ongoing IV therapies
Approach to the Tracheostomy or Laryngectomy patient with respiratory compromise?
Laryngectomy (Lx) differences
- Lx patients are obligate stoma breathers
- Tx patients still have at least partially patent upper airway
- Lx stomas are typically larger
- Lx stomas will have a blind ending superior tracheal inlet
- Lx often have a heat moisture exchanger (HME) on the outside that can be removed
- Sometimes a flexible tube is attached to the HME (Larytube) that is used to maintain patency early post surgery
- Lx often have a tracheo-esopheal prosthesis (TEP) inserted inside to allow for speech (one way valve that should not be removed)
- Capnography should be placed over the stoma, if placed over the mouth it will be 0 (confirming a laryngectomy)
Laryngectomy complications
- Pharyngocutaneous fistulas, dehiscence and local haematoma in 7-10 days post surgery
- Obstruction by FB (parts of the stoma care or the TEP dislodging)
- Excess secretions (try 5mls of N. saline to break it up, suction)
Carotid Blowout Syndrome
- More common than tracheo innominate fistula in Lx (TIF rare in Lx patients due to lack of inner cannula)
- When the carotid or its branches erode into the Lx
- Heralded by new haematoma, bruise or bleeding
- Secure with ETT, direct pressure, early surgical/IR and MTP
Laryngectomy Emergency
- Call ENT/Anaesthetics
- Arrange OT
- NRB 15L to stoma +/- face if unclear of Lx vs Tx
- Can place LMA or paediatric face mask with BVM over stoma
- Ideally Mapleson C circuit with T-piece, but BVM will do
- Capnography to stoma
- Difficult airway trolley, ideally fibreoptic scope, size 6 or smaller ETT, trahcoestomy kit, soft suction catheters and bougie
- Remove outer covering, HME, any inner cannula and suction
- If not working then remove outer cannula as well (only stoma left)
- Never remove the TEP
- If still not working then ideally fibreoptic guide size 6 ETT into stoma
Tracheostomy Emergency
Tracheoinnominate fistula
- Overinflate the Tx balloon
- If fails then remove cannula and place finger into Tx and put direct pressure over bleeding site
- Ideally intubate from above to maintain airway in this situation
Approach to the Geriatric Airway and peri-intubation?
Issues
- Increased likelihood to need to be intubated due to lack of reserve
- Increased difficulty with BVM (missing teeth, less facial tissue)
- Reduced cardiopulmonary reserve leading to faster hypoxia and hypotension
- Need for adjustment of drug doses
- More friable airway tissue and may bleed easier (ie on anticoagulants)
- At greater risk of C-spine injury from laryngoscopy
Physiologic changes
- Impaired gas exchange
- Increase V/Q mismatch
- Decreased lung elasticity/decreased compliance leading to increased WOB
- Less chest wall muscle
- Reduced cough and mucocilliary clearance (aspiration risk)
- Reduced brain responsiveness to hypoxaemia and hypercarbia
- Heightened sensitivity to negative inotropy/vasodilation from induction agents
- Greater number of co-morbidities
Modifications
- Inquire about patient wishes and advanced care directives prior to intubation
- Adequate pre-oxygenation and apnoeic 02/BVM through apnoeic period
- Adequate cardiovascular resuscitation prior to induction, consider bolus/infusion vasopressors
- Normal dose of paralytics, but decrease induction dosing by 30-50%
- Use of 2-hand technique and NPA/OPA for BVM
- Use of VL and adjuncts to aid intubation
- Consider awake intubation
Approach to the Obese airway and peri-intubation?
Issues
- Increased thoracic fat distorts airway position when on back
- Large breasts
- Reduced intraoral space
- Harder to palpate CTM
- Raised Intra-abdominal pressure increased the risk of aspiration
- Facial fat makes BVM harder
- Reduced FRC and atelectasis
- Higher metabolic demand leads to faster desaturation
- Difficult IV access
- less reliable NIBP readings
Modifications
- use ramping to get tragus in line with sternal notch
- Consider short handly laryngoscope for large breasts
- Vertical incision then dissect down to CTM before horizontal CTM cut
- 2-handed BVM technique with NPA and OPA
What is the predicted BVM difficulty mnemonic?
MOANS
Mask Seal
- Bushy beard, crusted blood, disruption to facial continuity in trauma
Obesity/Obstruction
- Obesity, pregnancy, angioedema, ludwigs angina, upper airway, abscess, epiglottis
Age
- >55
No Teeth
- Leave dentures in edentulous patients
Sleep Apnoea/Stiff lungs
- COPD, asthma, ARDS
What is the predicted intubation difficulty mnemonic?
LEMON
Look externally
- Lower facial disruption, bleeding, small mouth, agitated patient
Evaluate (3-3-2 rule)
- Mouth opening >3 fingers
- 3 finger breadths from tip of mandible to anterior neck
- 2 fingers from the base of the mandible to the thyroid neck
Mallampati Score
- I Complete visualisation of soft palate
- II Complete visualisation of the Uvula
- III base of the uvula only
- IV No soft palate seen
Obstruction/Obesity
- obesity
- stridor, muffled voice, not swallowing secretions, sniffing position/tripod
Neck Mobility
- Trauma C-spine precautions
- Arthritis, ank spondylitis
What is the mnemonic for difficult LMA insertion?
RODS
Restricted mouth opening
Obstruction
Disrupted/Distorted anatomy
Stiff lungs/cervical spine
What is the mnemonic for difficult front of neck access?
SHORT
Surgery
- ie previous laryngectomy etc
Haematoma
- also infection, abscess, any swelling
Obesity/Obstruction
Radiation
- To the neck, distorts tissue planes
Tumour
- Neck and mediastinal tumours
An approach to massive haemoptysis SCBD
Life Threats!
- Massive PE
- Eroded tumour (Lymphoma, mets, primary bronchial tumour)
- Severe pneumonia or abscess (staph, strep, legionella)
- AVM or aortobronchial fistula
- aortic aneurysm
- Tracheoinnominate fistula or Carotid blowout syndrome (laryngectomy and tracheostomy patients)
- Severe coagulopathy/DIC (including leukaemia)
- Severe congenital or acquired heart disease or pulmonary hypertension (RHD with MS as example)
- Trauma or iatrogenic ie post procedural
DDx
- Bronchitis or Bronchiectasis (chronic infection, cystic fibrosis)
- TB
- Foreign body
- Non-eroding tumour
- Vasculitis (Wegeners, Goodpastures, SLE)
- Cocaine
- Mimics (haematemesis, post tonsillectomy, epistaxis)
History
- Rate, amount, and appearance (more than 500mls highly concerning)
- Previous episodes
- Known PHx
- PE risk factors
- Recent trauma/surgery
- Bleeding diathesis
- Medications (ie anticoagulants)
Investigations
- FBE and film
- Group and hold + cross match
- VBG, BSL and electrolytes
- Coags, D-Dimer, troponin
- ECG
- Sputum culture
- CXR/CTPA
- Early bronchoscopy
Emergency Management
- Soiled airway algorithm, difficult airway trolley, low threshold for FONA
- ENT/Resp/ICU/Anaesthetics
- Massive transfusion protocol, TXA 15mg/kg bolus then infusion (+/- Vit K, prothrombinex)
- Bleeding lung down (if known)
- Large bore ETT (ideally 8.5 or 9)
- Consider specifically intubating the R) or L) mainstem with 90 degree rotation, then can consider bronchial blocker post
- Anaesthetics may consider a double lumen tube
- Ultimately needs IR and angioembolization +/- thoracic surgery