Lung diseases Flashcards

1
Q

Where in the lung airways does asthma affect?

A

Conducting airways

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2
Q

Where in the lung airways does COPD affect?

A

Conducting airways and parenchyma

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3
Q

Where in the lung airways does ILD/IPF affect?

A

Lung parenchyma

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4
Q

Where in the lung airways does TB affect?

A

Anywhere in the lung

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5
Q

What %FEV1 improvement following Bronchodilator administration is indicative of asthma?

A

> 12%

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6
Q

Why does asthma worsen in pregnancy?

A
  • 20% increase in o2 consumption
  • 15% increase in metabolic rate
  • 40-50% increased respiratory minute volume (amount of gas inhaled or exhaled in 1 min)
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7
Q

Factors for a diagnosis of asthma in pregnancy?

A

History of cough/wheeze/tightness

Reduced FEV1

Reduced FVC:FEV1 ratio

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8
Q

In what weeks of pregnancy is asthma worst?

A

24-26

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9
Q

Differentials to asthma in pregnancy?

A
Dyspnoea of pregnancy
PE/amniotic fluid embolism
Bronchitis/pneumonia
Allergic rhinitis/sinusitis
HF
GORD
Vocal cord dysfunction
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10
Q

What drugs should be used in asthma in pregnancy?

A

All can be used

SABA, LABA, corticosteroid, Theophylline (methyxanthine), chromones.

Corticosteroids associated with low birth weight and pre term birth should not be withheld in severe cases.

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11
Q

Long term treatment therapies for COPD?

A

Antimuscarinics, LABAs, ICS and LABA,

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12
Q

R/Fs for IPF?

A
Genetics - MUC5B
Smoking
Environmental exposure
Microbial agents - Herpes (EBV, HHV7/8, CMV)
GORD
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13
Q

Presentation of IPF?

A

Exertional dyspnoea
Dry cough
Clubbing
Diffuse inspiratory crackles

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14
Q

What do you have to exclude to diagnose IPF?

A

Exclude: Medications, Connective Tissue diseases, environmental exposures

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15
Q

Prognosis of IPF?

A

Median survival is 3 years

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16
Q

investigations to diagnose IPF?

A

Usual interstitial pneumonia (UIP) pattern on chest HRCT/ surgical lung biopsy

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17
Q

Complications of lung biopsy and mortality rate?

A

Acute exacerbations of interstitial disease
Pneumo/haemothorax
Empyema
Pneumonia

18
Q

What characterises restrictive lung disease?

A

Loss of lung volume

19
Q

Treatment for IPF?

A
  • Nintedanib/pirfenidone (antifibrotics)
  • Symptom control
  • O2 therapy
  • Transplant
  • Pulmonary rehab
20
Q

Usual presentation of pulmonary TB?

A

Cough
Weight loss
Night sweats
~6months of symptoms

21
Q

Investigation findings for TB?

A

Atypical shadowing on CXR
Sputum acid-fast stain positive (Zhiel-Nielson)
Bronchoscopy

22
Q

TB treatment? Length of treatment?

A
  • Rifampicin
  • Isoniazid
  • Pyrazinamide
  • Ethambutol

For a minimum treatment length of 6 months

23
Q

How many women require medical intervention for asthma in pregnancy?

A

45%

24
Q

What investigations should you not perform for asthma in pregnancy?

A

Methacholine challenge

Skin prick testing

25
Q

adherence rate for asthma medication in pregnancy?

A

50%

26
Q

What allergic investigations would you perform in asthma in pregnancy?

A

IgE blood analysis

27
Q

What are asthma exacerbations most associated with?

A

Low birth-weight babies

28
Q

What gene is associated with asthma in pregnancy?

A

ADAM33

29
Q

prediction of severity of COPD by FEV1?

A

> 80%, mild airways obstruction
50%- 80%, moderate airways obstruction
30%- 49%, severe airways obstruction

30
Q

Types of oxygen therapy in stable COPD?

A

Long term oxygen therapy

Ambulatory oxygen (desat on exertion)

Palliative short burst oxygen therapy

31
Q

Best way to improve mortality in COPD patients? Why?

A

Smoking cessation,

Makes oxygen less risky
Inhalers work better
Less exacerbations
Improved mental health
Improved cardiovascular health
32
Q

Inhaled drug therapies in COPD?

A

Bronchodilators: Long acting anti-muscarinics/Long acting B-agonists

Inhaled steroids IN COMBINATION with Long acting B agonists

33
Q

What is pulmonary rehab?

A

a program of exercise, education, and support to help you learn to breathe—and function—at the highest level possible.

34
Q

Four key interventions to improve QOL in COPD?

A

FOOD /Smoking cessation /Pulmonary rehabilitation /oxygen therapy

35
Q

Spirometry results of a COPD patient?

A

Obstructive FEV1/FVC with no bronchodilator reversibility

36
Q

Investigation to diagnose IPF? If the first line isn’t diagnostic what would you perform?

A

HRCT

Surgical biopsy

37
Q

Pattern of IPF on a HRCT?

A
Bilateral		
Basal/peripheral	
predominance	
Reticular	lines		
Honeycombing		
Traction bronchiectasis
38
Q

What type of pulmonary disease is IPF?

A

Restrictive

39
Q

Tests for TB?

A

Sputum acid fast bacilli will be positive (zhiel-nielsen)

Induced sputum

Bronchoscopy

40
Q

How long would a TB culture normally take to grow? What media may speed this up?

A

Several weeks

A Bactec 460 Radiometric culture

41
Q

What is a ghon focus?

A

The primary site of TB infection

42
Q

What does TB do to the ECM that allows it to be successful? What is the proposed mechanism of this?

A

Destroys it.

Increased secretions of MMPs