Anaesthesia and Critical Care Flashcards

1
Q

what happens to the heart rate in neurogenic shock?

A

Bradycardia (loss of sympathetic input)

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2
Q

What happens to the cardiac output in septic shock?

A

Increased CO

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3
Q

what happens to the SVR in septic shock?

A

Decreased SVR

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4
Q

what happens to the cardiac output in cariogenic shock?

A

Decreased CO

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5
Q

what happens to the cardiac output in cardiogenic shock?

A

Increased SVR

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6
Q

what happens to the central venous pressure in cariogenic shock?

A

Increased CVP

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7
Q

what happens to the central venous pressure in septic shock?

A

Decreased CVP

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8
Q

where is a trachoestomy incision made in adults?

A

between 2nd + 4th tracheal rings

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9
Q

how much blood is lost in type II haemorrhagic shock?

A

750-1500ml (15-30%)

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10
Q

how much blood is lost in type III haemorrhagic shock?

A

1500-2000ml (30-40%)

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11
Q

how much blood is lost in type IV haemorrhagic shock?

A

> 2000 (>40%)

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12
Q

when should a tracheostomy tube be changed at the earliest?

A

3 days post op

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13
Q

what is the cardiac index?

A

Assessment of cardiac output based on a persons size. Cardiac output / total surface area m2.
Normal 2.5-4.0L/MIN/M2

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14
Q

In hypocalcaemia what happens to the QTc interval?

A

Prolonged QTc

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15
Q

what is the average normal stroke volume?

A

70ml/beat

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16
Q

what is the action to stimulation of beta-2 receptors?

A

Vasodilation

Bronchodilation

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17
Q

what substance do beta receptors activate?

A

Adenylate Cyclase

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18
Q

do beta receptors result in increased or decreased production of cAMP?

A

Increased

19
Q

though which part of the brain is pain conveyed?

A

Thalamus

20
Q

what sensory modality is carried by A-alpha fibres?

A

Proprioception

21
Q

what sensory modality is carried by A-beta fibres?

A

Light Touch

22
Q

what sensory modality is carried by A-delta fibres?

A

Sharp localised Pain

23
Q

what sensory modality is carried by C fibres?

A

Diffuse dull pain

24
Q

are C fibres myelinated?

A

No

25
Q

which of the following type of nerve fibre has the smallest diameter: A-alpha, A-beta, A-delta, C fibre

A

C fibres

26
Q

what is the narrowest part of the airway in children?

A

Cricoid

27
Q

what does the CVP measure?

A

right atrial filling pressure

in normal circumstances approximates left atrial filling pressure

28
Q

at what VO2 level is anaerobic threshold reached?

A

50% of VO2 max

29
Q

does intermittent positive pressure ventilation lead to an increase or decrease in ICP?

A

Increase

30
Q

does intermittent positive pressure ventilation lead to an increase or decrease in blood pressure?

A

Decrease

31
Q

does intermittent positive pressure ventilation lead to an increase or decrease in splanchnic blood flow?

A

Decrease

32
Q

what is the maximum dose of lignocaine?

A

200mg

20ml of 1%

33
Q

what is the maximum dose of lignocaine with adrenaline?

A

500mg

50ml of 1%

34
Q

what is the maximum dose of bupivacaine?

A

150mg

35
Q

which local anaesthetic agent is contraindicated in regional block?

A

Bupivacaine

36
Q

which local anaesthetic is most commonly used in a regional block?

A

Prilocaine

37
Q

what doses/kg are maximum for lidocaine?

A

3mg without adrenaline, 7mg with adrenaline

38
Q

what doses/kg are maximum for bupivacaine?

A

2mg/kg

39
Q

what doses/kg are maximum for prilocaine?

A

6mg without adrenaline, 9mg with adrenaline

40
Q

how do you calculate mean arterial pressure?

A

MAP = DBP + 0.3(SBP - DBP)

41
Q

how do you calculate cerebral perfusion pressure?

A

CPP = MAP - ICP

42
Q

what respiratory rate is concurrent with SIRS response?

A

> 20

43
Q

what HR is concurrent with SIRS response?

A

> 90

44
Q

what is the paO2 of venous blood?

A

5.33