Anaesthesia IV Week 6-12 Flashcards

(105 cards)

1
Q

What is the “cover” from

Cover abcd stand for?

A
Circulation, colour, capnography 
Oxygen delivery, analyser, oximeter
Vaporiser, ventilator
ETT, eliminate machine 
Review monitor and equipment
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2
Q

What is the “abcd” in cover abcd stand for?

A

Airway
Breathing
Circulation
Drugs

Be aware of air and allergy

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3
Q

What does “a swift” from a swift check stand for?

A
Air embolism, anaphylaxis, air in pleura, awareness
Surgeon, sepsis
Wound, water intoxication
Infarct, insufflation
Fat syndrome, full bladder
Trauma, tourniquet
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4
Q

What does “check” from a swift check stand for?

A
Catheter (IV, chest drain), cement 
Hypo/hyperthermia, hypocalcaemia 
Embolus, endocrine
Check
K+, keep patient asleep
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5
Q

What is cover abcd and a swift check for?

A

Diagnostic aides
Cover abcd should be used whilst scanning
A swift check can help to eliminate and diagnose problems

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6
Q

What is “scare”?

A

Scan: routine checking per 5min using cover abcd
Check: when suspect something not right
Alert/ready: recognise a problem looks so call for help
Emergency: full response

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7
Q

What increase risks of bronchospasm?

A

Infection
Smoking
asthma

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8
Q

What might cause a laryngospasm?

A

Suctioning
Surgical stimulus
Secretions

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9
Q

What is “isbar”?

A

Identify: who, where, role
Situation: what happening, diagnosis, operation
Background: clinical details
Assessment: what problem is
Recommendation: what required, risks, assign responsibility

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10
Q

Why are air embolisms common in neuro surgery?

A

Veins in cranium held open

If in sitting position (head above heart) air may be entrained

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11
Q

What are causes of air embolisms?

A
Entrainment in vessels 
Unprimed lines
Insufflation 
Entrainment in lines
Pressure bags
Long bone surgery
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12
Q

What are the symptoms of an air embolism?

A
Low ET CO2
Low sats
Low BP
High HR
ECG changes
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13
Q

What is the treatment of air embolisms?

A

Call for help
Inform surgeon: irrigate, lower site, soaked swabs, entry point
100% oxygen
Stop nitrous
Consider CPR
Left side down to prevent travel to ventricles
Aspirate with CVL or hyperbaric chamber

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14
Q

What problem does an air embolism impose?

A

Too much air in the ventricles means the heart cannot pump properly
Most air is removed by lungs
Left lateral keeps air in RA
Problem with babies who have PDA as can then reach left heart and go to brain

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15
Q

What are the symptoms of anaphylaxis?

A
Low BP
Bronchospasm
High pressure
High HR
Urticaria
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16
Q

What is the treatment of anaphylaxis?

A

Help
Stop causative agent
100% o2 airway?
Arrest? - CPR algorithm
Adrenaline 50-100mcg IV 1:10000 (0.5mg 1:1000 IM) repeat 5 minutely
Rapid infuse fluids
Also: adrenaline infusion (0.4mcg/kg/min), neb adrenaline, inotrope, salbutamol, trytase testing, extra lines, steroid and antihistamine

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17
Q

What are the common causes of anaphylaxis?

A
Latex
AB
Relaxant
Chlorhexidine
Colloid
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18
Q

What are the times for trytase testing?

A

1 hour
4 hour
24 hour

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19
Q

What are the symptoms of a pneumothorax?

A
Resp distress or difficult to ventilate
Tracheal deviation
High HR
Low BP
Neck vein distension
Misplaced apex beat
Reduced sound on one side
Low sats 
Unilateral chest rise
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20
Q

What is the treatment of a pneumothorax?

A

Help
100% oxygen
Nitrous off
Insert large IV into the 2nd intercostal space of the mid clavicular line
Or 5th intercostal space of the mid Axillary line

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21
Q

What might cause of pneumothorax?

A
Trauma
Nearby nerve blocks
Central lines
Surgical causes 
CPR 
Traumatic intubation
Drains
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22
Q

What are the symptoms of fat embolism syndrome?

A
Neurological changes
Respiratory distress
Low sats
Low BP
Arrest
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23
Q

What is the problem with water intoxication?

A

Circulatory overload

Electrolyte disturbance such as hyponatraemia

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24
Q

What is bradycardia and the treatment?

A
<40bpm
Help
100% oxygen (volatile off?)
Exclude hypoxia in children 
Stop surgical stimulus
Atropine 0.6mg 
If remain: adrenaline or transcutaneous pacing 
Consider CPR
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25
What is the treatment of hypoxia?
``` Help 100% o2 - confirm on analyser Ensure circulation remains Hand ventilate Check equipment Auscultation of chest Consider: suction catheter, reintubate, F/O look, X-ray, ABG ```
26
What is the treatment for hypotension?
``` Help 100% o2 - volatile down Check pulse and equipment Head down Open fluids - pressure Vasopressors Consider CPR Find the cause More IV access ```
27
What are the symptoms of laryngospasm?
``` Strider Inspiratory obstruction Tracheal tug Paradoxical breathing Low sats Low HR ```
28
What is strider and paradoxical breathing?
Strider: abnormal high pitched inspiratory noise Paradoxical: chest moves inward on inspiration instead of out
29
What is the treatment of laryngospasm?
``` Help 100% o2 Jaw thrust/chin lift Peep/CPAP Deepen anaesthetic Check airway clear Sux/atropine and intubate ```
30
What is considered a high airway pressure and what's the treatment?
``` >40cmh2o Help Inform surgeon - stop stimulus 100% o2 Manual ventilation Check equipment Check airway: suction Cath, et position, auscultation Bronchospasm: salb + adren Pulm oedema: GTN + peep ```
31
What are the progressive symptoms of local anaesthetic toxicity?
``` Tingling of lips and mouth Ringing in ears Confusion Seizure ECG changes Cvs collapse - arrest ```
32
What is the treatment of LA toxicity?
``` Stop LA Help 100% o2 Consider intubation Treat seizure Control cvs - CPR or drug therapy Give intralipid!!! ```
33
How is intralipid used during LA toxicity?
20% Bolus: 1.5ml/kg over one minute Infusion: 15ml/kg/Hr (0.25ml/kg/min) If still unstable 5min after bolus, repeat bolus every 5 min up to 3 times and double the infusion rate Maximum 12ml/kg cumulative dose
34
What are the early symptoms of MH?
``` Prolonged massater spasm with sux High ETco2 High RR High HR Arrhythmia ```
35
What are the developing symptoms of MH?
``` 0.5 degree increase in temperature every 15min Respiratory and metabolic acidosis High potassium Sweating Cvs instability Low sats and mottled skin Muscle rigidity ```
36
What are the late symptoms of MH?
Cola urine - myoglobinuria High CK Coagulopathy Arrest
37
What is the treatment of MH?
``` Help Stop trigger agents - remove Switch to TIVA MH box - task cards (Dantrolene is priority) 100% o2, hyperventilate, FGF>15 with vapor free filters Insert additional lines Swap fluids to cold saline Ice pack body Swap soda lime Treat other factors Investigations Dantrolene mixing ```
38
What is the dose of dantrolene?
2.5mg/kg IV bolus every 10-15min and repeat up to 30mg/kg
39
What drugs are used to treat the other factors?
Acidosis: sodium bicarbonate Potassium: insulin in dextrose Arrhythmia: amiodarone, lignocaine
40
Who is susceptible to MH?
Family history Diagnosed MH Raised Creatine kinase Rare muscle disorders
41
How is the anaesthetic machine prepared for a known MH case?
Should be first on list Remove vaporisers and sux - Flush circuit for 90sec using 15L/min on the ventilator with test lung attached Insert vapor free filters Replace all consumables while still maintaining a flush of 15L/min Keep FGF above 10L/min for first 90 minutes of the case
42
What are the aims of haemorrhage treatment and other drugs which could be considered?
MAP > 50 Laboratory goals Other drugs: Calcium Insulin for high potassium Tranexamic acid
43
What is the treatment of cardiac arrest?
Help 100% o2 Start CPR Attach defibrillator (200J) Assess the rhythm Shockable: 1mg adren after second shock and every second cycle, amiodarone 300mg after third shock Non-shockable: adrenaline 1mg and repeat every second cycle During CPR: achieve airway, attach capnography, IV access
44
What are the 4H and 4T?
``` Hypoxia Hypovalaemia Hyper/hypokalaemia other metabolic disorders Hyper/hypothermia Tension pneumothorax Tamponade Toxins Thromboembolism ```
45
What is post resuscitation care of a cardiac arrest?
``` Reevaluate abcde 12 lead ECG Treat cause Paed: Reevaluate oxygen and ventilation Adult: aim for 94-98% O2, normocapnia and normoglycaemia Target temperature management (cool) ```
46
What is the symptoms of aspiration?
``` Laryngospasm Obstruction Bronchospasm Crackles Hypo ventilation Dyspnoea Low sats ```
47
What is the treatment of aspiration?
``` Help Intubate Suction, 100% o2, peep Bronchoscope and lavage Bronchodilator X-ray ```
48
What should be done if the patient is regurgitating?
``` Place head down Suction Cricoid Gentle CPAP bag mask Intubate ```
49
What are the symptoms of a bronchospasm?
``` High pressure Low sats Wheeze Low tv High co2 ```
50
What is the treatment of bronchospasm?
``` Help 100% o2 Stop any stimulation Deepen Check tube or intubate Adren or salbutamol Find and treat cause ```
51
What might cause a bronchospasm?
Anaphylaxis Irritation Aspiration Differential: pneumothorax, oesophageal intubation, too light
52
What is asthma?
Reversible airflow obstruction Smooth muscle construction Inflamed bronchial wall Increased mucus production
53
What is COPD?
Chronic bronchitis or emphysema Obstruction of airflow Non reversible From prolonged exposure to irritant Narrowing from inflammation, scar tissue and multiplying epithelial cells Reduced elasticity causes collapse on expiration causing gas trapping Enlarged mucus glands and reduced cilia function creates cough and mucus plugs
54
What is chronic bronchitis?
A productive cough on most days for over 3 years Inflamed bronchi Productive cough for more than 3 months each year for 2 consecutive years
55
What is emphysema?
Dilatation and destruction of alveolar which weaken and rupture causing reduced surface area for exchange Alpha1 anti trypsin deficiency: allow WBC to attack lung tissue
56
What are common COPD irritants?
Smoking Occupational hazards Pollution Repeated infections
57
What is a pink puffer?
``` Emphysema Thin Breathless High RR Hypoxic Barrel chest Pursed lips ```
58
What is a blue bloated?
``` Bronchitis Overweight Poor respiratory effort Hypoxic - blue Peripheral oedema Co2 retention ```
59
What is Cor pulmonale?
Enlargement of right heart from lung disease | High pressure in lung vessels means difficult to pump here therefore it backs up in the right heart so it works harder
60
What are normal blood gases?
Ph 7.35-7.45 O2 85-100 mmHg Co2 35-45 Be +3/-3 mmol/L
61
What are the anaesthetic considerations for COPD?
``` Pre optimise (neb) Avoid H1 drugs Not for SV Not ideal to lie flat RV failure? Suction catheter Extubate awake ```
62
What affects do anaesthetic have on the respiratory system?
``` Low FRC (quick hypoxia) Low Cc (collapse before end expiration - gas trap) Atelectasis V/q mismatch Reduced pharyngeal tone Increased secretions Low MV Infection risk ```
63
What is rheumatoid arthritis?
``` Autoimmune inflammatory More common females Reduced movement due to joint swelling, pain and stiffness Chronic pain Symmetrical ```
64
What are the articular problems with rheumatoid arthritis?
Temporomadibular: mouth opening reduced larynx obstructed by nodules Atlantoaxial subluxation: neck motion limited, movement may compress cord
65
What are the non articular problems with rheumatoid arthritis?
``` Cardiac: CAD, HD, aortic regurgitate Resp: pleural effusion, reduced chest compliance Chronic anaemia - monitor Neuropathy, dry eye, cord compression Immunosuppressants!! Renal failure DI ```
66
What is diabetes mellitus?
Insulin stimulates glucose uptake into cells Type 1: immune mediated, IDDM, pancreas doesn't produce insulin, deficiency, Tx: insulin Type 2: NIDDM, cells don't respond to insulin or not enough is produced, resistance, Tx: diet, exercise, oral, insulin
67
What are the systemic complications of DM?
CAD, PVD, poor circulation, HTN, IHD Neuropathy, autonomic neuropathy - vessels can't constrict to compensate - hypotensive easily High infection risk Kidney failure, high creatinine Retinopathy Delayed gastric emptying, reflux (RSI) Thickened soft tissues: limited joint mobility syndrome - DI
68
Why is Hartmans solution not ideal in DM?
Contains lactate which is converted to glucose in the fasted state which could Potentiate hyperglycaemic state
69
What are the symptoms of DM?
``` Weight loss Thirst (polydypsia) Polyuria (frequent urine) Polyphagia ( hunger) Blurred vision Headache Fatigue Reduced healing ```
70
What is diabetes insipidus?
Deficiency of pituitary hormone ADH which regulates kidney function. Creates thirst and increased urine
71
What is gestational diabetes?
Development of high blood sugar during pregnancy. Foetus creates higher need and hormones may disrupt normal insulin. Mother has higher risk of developing T2DM later in life
72
What are the rules with insulin/dextrose infusions?
``` Deliver through same line Fluid through volumetric pump Insulin through syringe driver Anti reflux valve on glucose line to prevent bolus of insulin Check regularly ```
73
What is hypoglycaemia and the treatment?
<4mmol/L Cause brain death 50ml of 50% glucose IV 1mg glucagon IM/IV
74
Why is potassium added to DM regimes?
Dextrose/insulin can cause low potassium levels so needs replacing. Usually added to dextrose bag
75
What is DKA?
Diabetic ketoacidosis Not enough insulin to use glucose so fat gets metabolised for energy which produces poisonous ketones Fluid shifts to ECF Caused by missed insulin, infection, first presentation of DM
76
What are the symptoms and treatment of DKA?
``` Reduce alertness High RR Fruit breath Nausea and vomiting Dehydration ``` Insulin and fluid; add potassium later
77
What is obesity?
>30 kg/m2
78
How is BMI calculated?
Weight/height2
79
What are the systemic effects of obesity on the cardiac system?
``` High blood volume High CO, SV, BP CAD, IHD, HTN Atherosclerosis LV hyper trophy ```
80
What are the systemic effects of obesity on the respiratory system?
``` High oxygen consumption from more tissue and supporting muscles High CO2 Low FRC and CC Low compliance Osa ```
81
What are other systemic effects of obesity?
``` High abdominal pressure More gastric acid High aspiration risk Low liver function Likely NIDDM DI Poor IV access Increased infection ```
82
What pharmacology effects so obese patients pose?
Changed Vd due to less water and more fat Higher plasma cholinesterases Lipophilic drugs have a higher Vd and duration - anaesthetic LA in central blocks need reduced dose as less space (more fat) LA and GA drugs based on ideal weight
83
What is PVD?
Circulation disorder caused by narrowing, blockage or spasms in blood vessels. From athersclerosis/plaques Reduce flow and O2 to tissue Can be functional: no damage to structure, change from other factors eg temp Organic: changed structure - plaque
84
What are the anaesthetic considerations for PVD?
``` 60% will have CAD Difficult to manage BP as hardened vessels are less compliant - art line Cardiac events/stroke risk - invos or RA Optimise pre op DVT care Pressure area care 5 lead ECG? Warming ```
85
What ventilator settings can help with COPD?
Change I:E | Peep
86
What is osa?
Frequent episodes of apnoea during sleep >5/hr or >30/night 10 seconds is apnoea
87
What is preeclampsia?
Condition of pregnancy Symptoms: HTN, oedema, proteinuria Can cause seizures and coagulopathy Treatment: hypotensives and bed rest, deliver baby in unstable
88
What might cause a PPH?
Retained placenta preventing the uterus from contracting
89
What is placenta previa and accretia?
Previa: placenta attached to wall close to or covering cervix Accretia: placenta grows through to myometrium Increta: grows into myometrium and muscle layer Percreta: grows through myometrium onto surrounding structures
90
What is an amniotic fluid embolism?
Amniotic fluid or fetal cells enter mothers circulation and cause an allergic-like response
91
How does the obstetric DAS differ?
Maximum 2+1 attempts intubation Maximum 2 attempts at supraglottic It is an RSI
92
How is adrenaline used in anaphylaxis and in cardiac arrest?
Anaphylaxis: 50-100mcg IV or 0.5mg IM Cardiac arrest shockable: 1mg every second cycle Cardiac arrest non-shockable: 1mg immediately then every second cycle
93
How does the paediatric cardiac arrest algorithm differ?
2 breaths: 15 compressions Charge to 4J/Kg Shockable: 10mcg/Kg 2nd loop 5mg/kg amiodarone 3rd shock Non-shockable: 10mcg/Kg immediately and every 2nd loop
94
How does the paediatric algorithm for anaphylaxis differ to adult?
Adrenaline 10mcg/kg IM of 1:1000 Repeat 3-5 minutes 20ml/kg fluid bolus
95
Draw the algorithm for CPR.
See notes
96
What are the four classes of hypovalaemic shock?
1: <15% 2: 15-30% 3: 30-40% 4: >40%
97
What are the signs of shock, lower airway obstruction and upper airway obstruction in anaphylaxis?
Shock: hypotension Upper airway: strider, swelling Lower airway: wheeze
98
How does paediatric MTP work?
Ring blood bank Ensure X match Alpha: 0-10Kg Bravo: 11-20Kg Charlie: 21-45Kg Each weight tare has different products arriving in each box with a certain volume to be given of each. Remember tranexamic acid, warming and lab checks
99
What is in each MTP box?
``` Box1: 2xRBC, 2xFFP Lab check, tranexamic Box2: 4xRBC, 4xFFP, 3xCryo Box3: 4xRBC, 4xFFP, 1xPlate Lab check Box4: 4xRBC, 4xFFP, 3xCryo Alternate box 3&4, lab check/30min ```
100
What's the purpose of the guardian of the box?
``` Overseas safe management of the box IV certified nurse/tech/MO May be theatre coordinator Guardian initials box when arrived Check pt ID on form against that on box Select one at a time for checking ```
101
What reversal agents are used?
Sug reverses vecuronium and rocuronium Neo reverses all non-depolarises except mivacurium
102
What could be some patient, equipment and machine causes of a high airway pressure?
``` Aspiration Spasm Pulmonary oedema Tension pneumothorax Kinked tube Tube moved and against trachea Tube in too far; one bronchi Filter blocked Tubing occluded by a FB Run over tubing Valve stuck Ventilator malfunction Pressure relief valve failure (Disconnect circuit, on bag, squeeze to eliminate machine and circuit) ```
103
What are the steps of MTP?
1. Massive bleeding and shock or coagulopathy 2. Initiate 777: MTP, location. This will contact relevant ppl Correct forms with either emergency blood or box 1. Send via runner; wait 3. Give 3 units of RBC 4. Activate: Call blood bank: MTP, clinician and guardian Ensure X match sent Request each box as needed by form Consult the additional treatment thresholds with lab results Cancel MTP ASAP Warming, lines, fluid, level1, testing
104
What are methods of dealing with obstetric bleeding?
IR: balloon catheters into internal iliac vessels prior to case and inflated at time of delivery Intrauterine tamponade with a saline filled Bakri balloon Cross match prior Cell salvage with care Uterotonics Hysterectomy Bimanual compression of uterus
105
Why is magnesium used in eclamptic patients?
It is used to control an initial seizure and an infusion is used to prevent any more