copd and respiratory failure Flashcards

1
Q

what to give in acute breathlessness in COPD

A
Steroids 
Nebulised bronchodilators 
Oxygen and target sats prescription 
VTE prophylaxis 
Antibiotics 
Sputum culture
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2
Q

COPD exacerbation types

A

Infective or non-infective

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3
Q

COPD exacerbation infection symptoms

A

Increased SOB
Increased sputum volume
Increased sputum purulence

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4
Q

What other symptoms can you have with COPD exacerbations

A

Wheeze/cough
Ankle oedema
Confusion/drowsiness

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5
Q

Investigations to do in copd exacerbation

A

CXR
ABG (don’t need to do if sats more than >94% on air and if they’re not drowsy or confused)
ECG
FBC
Sputum MC&C
Blood cultures (only do if they’re pyrexial)

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6
Q

Initial management of copd exacerbation

A

Bronchodilator use (SABA via spacer if well enough otherwise give via nebuliser air driven)

Prednisolone 30mg daily for 7 days

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7
Q

When to use abx

A

If have 2 or more of
Increased sputum volume
Colour change
Increasing breathlessness

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8
Q

When to give Abx for CAP or copd exacerbations

A

Don’t treat copd exacerbations with CAP protocols unless there is consolidation on CXR

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9
Q

How to choose pharmacological management

A

First use their FEV1FVC ratio and then use their mMRC score (A are those with mild COPD symptoms and D is the worst) to figure out a pharmacological management.

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10
Q

What count is responsive to steroids

A

High eosinophil count

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11
Q

What other comborbidities do those with COPD have

A
IHD 
Mental health 
Osteoporosis 
Bronchiectasis/astham 
Low BMI
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12
Q

When is long term oxygen therapy used

HOw often

A

pO2<7.3
Po2>7.3 <8 plus polycythaemia or cor pulmonale

Use at least 15h / day

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13
Q

Other oxygen therapies

A
Ambulatory oxygen (when walking around0
Short burst (as required)
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14
Q

Surgical COPD treatment for advanced

A

One way valve to allow air back out and collapse down

Surgical lung volume resection

Lung transplant

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15
Q

what is acute hypercapnia respiratory failure

-Presentstion?

A

Medical emergency
-AKA type 2 resp failure

-Problem is with ventilation therefore PaO2<8 and paCo2 >6

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16
Q

What is minute ventilation

-Formula?

A

The total volume breathed in and out over a minute in L

resp rate X tidal volume

17
Q

How does minute ventilation correspond to PaCo2

A

Higher minute ventilation the lower the CO2

18
Q

What can cause hypercapnia respiratory failure

A

Anything that reduces your RR or your tidal volume over time

  • Pathology that affects brainstem
  • morbid obesity
  • Congenital chest disorders or scoliosis
  • Muslce disorders as can affect diaphragm (MND, Guillain Barre)
  • Severe lung disease
19
Q

Blood gas of those with acute hypercapnia respiratory failure

A

Low pH
Raised Co2
Low Po2
Normal HCo3

20
Q

Blood gas of those with chronic hypercapnic respiratory failure

A

Normal pH
raised Co2
Low O2
High HCo3

21
Q

Blood gas of those with chronic hypercapnic respiratory failure

A

Low pH
Raised co2 more than their baseline
Low O2
High HCo3

22
Q

Management of Acute hypercapnic resp failure

A
Medical Management 
Ventilatory support (either non invasive or invasive) whilst medical management is working
23
Q

How does ventilation work

A

Improves chest expansion
Increased tidal volume
Increase minute ventilation
Lowers CO2 and improve oxygenation

24
Q

When can you use non invasive ventilation acutely

When can’t you

A

YEs

  • COPD
  • chest wall disorder
  • Neuromuscular disorder

No

  • asthma
  • Pneumonia
  • Pulmonary oedema
25
Q

What is Co2 narcosis

A

Group of people are o2 sensitive- when given O2 to correct their hypoxia, their Co2 rises

-Does not mean they have COPD. Anyone at risk of acute hypercapnic resp failure can develop co2 narcosis

26
Q

What sats should you do an ABG

A

if sats 94% on air

27
Q

If sats are 94% o2 and co2 <6, what o2% should you aim for

Unless?

A

94-98

Unless they’ve had previous history of hypercapnic resp failure