Acute scenarios Flashcards

1
Q

Narrow QRS complex (3 or below small squares/0.12s) - regular

A

SVT

Vagal Manouvres

Adenosine 6mg rapid bolus

if unsuccessful –> 12 mg

If unsuccessful –> 12mg

Adenosine slows conduction through the AV node

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2
Q

Narrow QRS complex tachycardia - irregular

A

AF

Control rate: B-blocker or diltiazem

Digoxin or Amiodarone if evidence of HF

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3
Q

Broad complex tachycardia (more than 3 small squares/0.12s) - regular

A

VENTRICULAR TACHYCARDIA

300mg Amiodarone IV over 20-60mins

then 900mg over 24hrs

Amiodarone is a potassium channel blocker

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4
Q

Torsades de pointes

A

Magnesium IV 2g over 10 mins

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5
Q

DKA : presentation

A

polyuria, polydipsia, abdo pain, vomiting, dehydration

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6
Q

DKA: Diagnosis

A

Serum glucose >11 or known diabetic

Serum ketones >3 urine ketones >3+

Metabolic Acidosis pH <7.3, Bicarb <15

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7
Q

DKA: Pathophysiology

A

Insulin promotes glucose and potassium uptake into cells

Insulin deficiency –> Cells use ketone metabolism instead of glucose. Hyperglycaemia

Hyperglycaemia & ketosis –> osmotic diuresis, metabolic acidosis and deranged electrolytes

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8
Q

DKA: High risk patients

A

Young people & elderly (incr risk cerebral oedema)

Pregnancy

Heart/renal failure

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9
Q

DKA: Management

A

Normalise fluids and electrolytes: 0.9% saline bolus 500ml over 15mins

40mmol potassium replacement

10% glucose infusion if <14

Switch off ketosis: IV fixed rate insulin 0.1U/kg/hour (max 15U/hr)

Continue long acting insulin alongside IV infusion

Identify and treat underlying cause

Monitor: FBC, VBG, U&Es, BM, ketones, GCS

Monitor for signs of cerebral oedema or fluid overload

Use local hospital DKA protocol for fluid and insulin replacement + specific monitoring

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10
Q

When is a DKA resolved?

A

Capillary ketones <0.6

blood pH >7.3

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11
Q

Hyperkalaemia: why is it dangerous and what is the treatment aim?

A

Can cause sudden death from cardiac arrhythmias.

Treament priority is to stabilise the myocardium, reduce potassium levels and address the underlying cause

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12
Q

What K+ level would signify hyperkalaemia?

A

5.5-5.9 = mild

6-6.4 = moderate

>6.5 or >6 & septic = severe

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13
Q

Causes of hyperkalaemia?

A

Failure or potassium excretion +/- inappropriate potassium input

Renal failure +/e precipitating factor e.g. nephrotoxic drugs, sepsis

Potassium sparing diuretics, ACEi, tumour lysis syndrome, rhabdomyelosis, adrenal insufficiency

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14
Q

Moderate/severe hyperkalaemia Management:

A

Stop any K+ sources - meds

Protect the heart: 10ml 10% Calcium Gluconate with cardiac monitoring (No effect on K+ serum level but cardioprotective)

Shift K+ into cells: 10U Actrapid in 50ml 50% dextrose over 10 mins

Salbutamol Neb

Remove K+ from body: Calcium Resonium PO/PR - binds K+ in the gut to prevent absorption (can take up to 12 hrs to work)

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15
Q

Hyperkalaemia - ECG Changes

A

Peaked T waves

Broad QRS

Bradycardia

absent/flattened P waves

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16
Q

HYPERKALAEMIA Management

A

A to E Approach

Stop extra sources : Stop any drugs - Potassium sparing diuretics, ACEi,

Cardiac protection: 10ml 10% Calcium Gluconate with cardiac monitoring (no effect on K+ level) and repeat as necessary

Shift K+ into cells:

INSULIN/DEXTROSE - 10U Actrapid in 50ml 50% Dextrose over 10 mins

SALBUTAMOL NEB

Sodium Bicarb (Renal team/ITU)

REMOVE K+ from body:

CALCIUM RESONIUM - PO/PR to prevent gut absoroption

Dialysis - ITU/Renal

17
Q

Hypoglycaemia: Presentation

A

any patient with reduced GCS or a seizure

Autonomic Symps: sweating, palpitations, tachycardia, dizzy, pale, tremor

Neuro Symps: fatigue, confusion, reduced consciousness, seizure

18
Q

Hypoglycaemia : who is most at risk?

A

Patients taking insulin, sulphonylureas (e.g. glicazide)

impaired renal/liver function

sepsis

19
Q

Hypoglycaemia: Causes

A

Insulin/Diabetes medication dose too high

Exercise

Alcohol

20
Q

Hypoglycaemia Management:

Conscious patient

A

15-20g short acting carbohydrate e.g. glucose tab, fruit juice, sweets

If BG remains <4, repeat up to 3 times then move to IV Tx

RECHECK after 10-15 mins.

REPLACE long acting carb - banana, yoghurt, 2 biscuits

Remember WARD HYPO BOX

21
Q

Hypoglycaemia Management:

Semi-conscious patient

A

If able to swallow: 1.5-2 tubes glucogel or 1mg IM glucagon

If BG remains <4, repeat up to 3 times then move to IV Tx

RECHECK after 10-15 mins.

REPLACE long acting carb - banana, yoghurt, 2 biscuits

Remember WARD HYPO BOX

22
Q

Hypoglycaemia Management:

Unconscious patient

A

Support the airway

160ml IV 10% glucose or 1mg IM glucagon.

Stop IV insulin if running

If remains <4, repeat bolus

RECHECK after 10-15 mins.

REPLACE long acting carb - banana, yoghurt, 2 biscuits

Remember WARD HYPO BOX

23
Q

Major Upper GI Bleed:

Bloods to be taken

A

FBC

Clotting

U&E

LFTs

ABG/VBG

Cross match 6 units blood

24
Q

Major Upper GI Bleed:

Fluid resus

A

Blood is best (cross matched/ group compatible/O neg in emergency)

otherwise FFP / colloid / crystalloid at appropriate level to maintain systolic BP above 100

ACTIVATE MHP

25
Q

What does the MHP contain?

A

First pack : 4 RBC, 2 FFP

Second Pack: 4 RBC, 2 FFP, 1 platelet

26
Q

Variceal Bleed:

after resus

A

Endoscopy immediately after resus

TERLIPRESSIN after resus

IV ABx and sepsis screen

Pabrinex if alcohol dependent

27
Q

Non-variceal bleed:

after resus

A

Endoscopy immediately after resus

PPI to patients with non-variceal bleed

28
Q

ANAPHYLAXIS:

Pathophysiology

A

Allergen sensitisation: specific IgE is produced to an allergen

Allergen exposure → Type I Hypersensitivity reaction

Cross-linking of IgE antibodies → rapid mast cell activation → release of histamine/inflammatory mediators → increased vascular permeability → smooth muscle spasm, mucosal oedema and inflammation

Distributive shock +/- airway compromise +/- bronchospasm

29
Q

ANAPHYLAXIS:

Management

A
  • REMOVE TRIGGER e.g. ABx
  • High flow oxygen
  • 500micrograms IM adrenaline : 0.5ml of 1:1000
  • FLUID RESUS, can raise legs to improve venous return
  • salbutamol nebs if wheeze

HYDROCORTISONE 200mg IM or slow IV

CHLORPHENAMINE 10mg IM or slow IV

30
Q

ANAPHYLAXIS:

After resus

A
  • Serum mast cell Tryptase → record at 1-2hrs from start of symptoms + 24hrs after/F/up clinic
  • Observations for a minimum of 6 hours. 24hrs if severe reaction → beware BIPHASIC RESPONSE
  • Dischard → prescribe epipen, refer to allergy service. Safety net on recognition of anaphylaxis
31
Q

ACUTE ASTHMA:

Pathophysiology

A

Reversible airway obstruction & airway hyper-responsiveness → bronchoconstriction, air trapping, V/Q mismatch

32
Q

ACUTE ASTHMA

Assessing Severity

acute severe - life threatening - near fatal

A

ACUTE SEVERE:

  • PEF 33-50% predicted
  • RR>25
  • HR >110
  • cant complete sentences

LIFE-THREATENING

  • PEF <33% best
  • Hypoxia: PaO2 <8kpa, cyanosis
  • Hypoventilation: ‘normal PaCO2’, exhaustion, silent chest, poor resp effort
  • Hypotension
  • Reduced GCS

NEAR-FATAL

  • Raised PaCO2
  • requiring mechanical ventilation
33
Q

ACUTE ASTHMA:

Management

A

O SHIT ME

Sit patient up

O - Oxygen 15L NRM

S- Salbutamol 5mg nebs

H- Hydrocortisone 100mg IV (if very breathless, vomiting etc.) If can tolerate PO 40-50mg Predisolone

I- Ipratroprium - 500 micrograms given with salbutamol in mixed neb

(T- Theophylline)

M- Magnesium Sulfate 1.2-2g IV - SENIOR HELP

E- ESCALATE