Flashcards in 14. Management of COPD Deck (75):
What are main features of COPD?
- airflow obstruction(chronic bronchitis) and hyperinflation (emphysema)
-not fully reversible
-repeating chest infections and inflammation cause obstruction
What are the 2 main symptoms of COPD which patients always present with?
2. cough and recurrent chest infections
What causes the cough in COPD?
What causes the breathlessness in COPD? (2)
1. airflow obstruction (impaired gas exchange/oxygenation)
2. hyperinflated chest which pushes diaphragm down causing breathing difficulty
What percentage of COPD patients are smokers?
85-95% (very high)
What do "free radical" species found in tobacco do to anti-elastase (anti-protease) enzyme? What happens as a result?
- Inactivates it (people with alpha-1-antitrypsin more prone to it)
- As a result, neutrophil elastase increases and (along with alpha-1-antitrypsin deficiency for people who have it), can cause tissue damage
In emphysema, what occurs to elastase enzyme production?
it increases (leading to tissue damage)
What are some of the systemic symptoms of COPD? (5)
1. loss of muscle mass (protein separation occurs; human necrosis factor)
2. weight loss and loss of appetite
3. cardiac disease risk increases
4. depression/anxiety etc
5. lacking energy (more energy put into breathing which causes extreme tiredness)
How many people are there diagnosed and undiagnosed with COPD in the UK?
diagnosed; ~ 1 million
undiagnosed: ~2 million and on the increase
How many people does COPD kill in the UK?
Will COPD be the 3rd leading cause of death by 2020?
How to diagnose a patient with COPD?
1. relevant history (symptoms)
2. look for clinical signs+examination
3. confirmation of diagnosis and assessment
4. other relevant tests
What age should you expect COPD?
35-40 + years
What are the most common signs of COPD seen in patients? (6)
1. current or former smokers
2. chronic cough
3. exertional breathlessness
4. sputum production
5. frequent winter bronchitis (or other chest infections)
6. wheeze/ chest tightness
Is there a diagnostic test for COPD?
No (tests only support the diagnosis)
What are 2 common tests done to confirm COPD diagnosis?
What is the clinical difference between age of COPD and asthma patients? (comparison)
-COPD: 35+ years
- asthma: any age
What is the clinical difference between cough in COPD and asthma patients? (comparison)
-COPD: cough is persistent and productive
-asthma: intermittent and non-productive
What is the clinical difference between smoking in COPD and asthma patients? (comparison)
-COPD: almost invariable/almost always
- asthma: possible
What is the clinical difference between breathlessness in COPD and asthma patients? (comparison)
-COPD: progressive and persistent
-asthma: intermittent and variable
What is the clinical difference between nocturnal symptoms in COPD and asthma patients?
-COPD: uncommon unless in severe disease
What is the clinical significance between family history in COPD and asthma patients?
-COPD: uncommon unless family members also smoke
-asthma: common (can have a genetic connection)
What is the clinical significance between concomitant eczema or allergic rhinitis?
- COPD: possible
-asthma: common (can have an allergic connection)
What are the common features of COPD on examination? (5)
1. reduced chest expansion
2. prolonged expiration/ wheeze
3. hyperinflated chest
4. respiratory failure
5. may be normal in early stages
What 5 signs signs suggest respiratory failure?
1. tachypneoa (abnormally fast breathing)
3. use of accessory muscles
4. pursed lip breathing
5. peripheral oedema
What happens to anterior and posterior chest dimensions in COPD patients?
they are bigger in relation to lateral dimensions
What causes peripheral oedema?
Right side of the heart has pressure put on it due to excessive breathing, abnormal gas exchange etc, so inadequate pumping leads to oedema.
Which features may be identified in COPD patient clinical history?
cough, breathlessness, chest infections (winter bronchitis), sputum,
What features may be identified in COPD patient examination?
- may appear normal (if early stages)
- tachypneoa, wheeze, hyperinflated chest
What does spirometry reading (FEV1/FVC) <70% suggest?
What does spirometry reading (FEV1/FVC) > 70% with FEV1>80% suggest?
What does spirometry reading (FEV1/FVC)> 70% with FEV1<80%
What must FEV1 value be for COPD to be considered "mild"?
What must FEV1 value be for COPD to be considered "moderate"?
FEV1 50-79% predicted
What must FEV1 value be for COPD to be considered "severe"?
FEV1 30-49% predicted
What must FEV1 value be for COPD to be considered very severe?
FEV1 <30% predicted
What is the RBC count in COPD patients?
High as bone marrow produces more RBCs during hypoxic situations
What are the COPD baseline tests? (5)
2. chest x ray
4. full blood count (anaemic/polycythaemic, eosinophilia)
5. BMI (weight and height) +nutritional assessment
Are prescriptions key to solving chronic medical problems?
No, management is key.
Why is patient's psychological well being important in COPD management?
Psychological aspect can stimulate nervous responses, increasing heart rate and breathing rate, leading to more energy being invested in breathing and making patient weaker leading to more susceptibility to further infection (constant cycle)
Outline possible COPD complications which can arise. (8)
1. Acute exacerbation COPD
3. Cor Pulmonale
4. Wasting (muscle atrophy)
6. Micro-nutrient deficiency
What is the main intervention to prevent disease (COPD) prevention?
stopping smoking (smoking cessation)
What is the main intervention to relieve breathlessness in COPD?
What is the main prevention for preventing exacerbation? (3)
inhalers, vaccines, pulmonary rehabilitation (PR)
What is the main management of complications strategy?
long term oxygen therapy
What are 5 on-pharmacological management of COPD methods?
1. smoking cessation
2. vaccinations (annual flu vaccine or pneumococcal vaccine)
3. pulmonary rehabilitation
4. nutritional assessment
5. psychological support
How many times faster does lung function decline in a smoker compared to a non-smoker?
3 x faster
Can lung function be restored if a patient stops smoking at 45?
Lung function cannot be reversed but lung function stabilises and doesn't fall downhill as fast as in smokers giving the patient better chances of slowing down their lung function decline.
Where are pulmonary rehabilitation classes done and for what time period?
usually in primary care settings (half a day for once a day or week for around 6 weeks depending on patient's severity)
Why does every medical intervention needs to be evidence based?
To prove that the intervention is benefiting the patient to the maximum.
What is Evidence A intervention?
- most studies have been done
- more significant statistical backing and most likely to be true
- can be the best intervention
What can evidence based medicine range from?
can range from Evidence A-D (from most/best to least/worst evidence)
What are 3 top benefits on pharmacological management of COPD?
1. relieve symptoms
2. prevent exacerbations
3. improve quality of life
What are 3 groups of inhaled therapy drugs used to manage COPD?
1. short acting bronchodilators
2. long acting bronchodilators
3. high dose inhaled corticosteroids (ICS) and LABA
What are the 2 short acting bronchodilators used to manage COPD?
1. SABA (e.g. salbutamol) -short acting beta agonist
2. SAMA (e.g. Ipatropium) -short acting muscarininc antagonistic
What are the 2 main long acting bronchodilators used to manage COPD?
1. LAMA (long acting anti-muscarining agent e.g. umeclidinium or tioptropium)
2. LABA ( long acting B2 agonist e.g. salmeterol)
What are the 2 main high dose inhaled corticosteroids (ICS) and LABA?
1. Relvar (Fluticasone/vilanterol)
2. Fostair MDI
What is the order of prescribing drugs for COPD going from mild COPD to worsening FEV1 and worsening symptoms and exacerbations. (approach to treatment)
2. long acting bronchodilators (LAMA OR LABA)
3. Further long acting bronchodilators (LAMA AND LABA
4. Triple therapy (ICS, LABA and LAMA)
What are the cheapest two COPD management methods?
- stop smoking support with pharmacotherapy
What are the most expensive two COPD management methods?
- telehealth for chronic disease (telecommunication)
- triple therapy (ICS, LABA, LAMA)
What must oxygen pressure fall below for Long Term Oxygen (LTOT) to be used? (in kPa)
What 4 conditions can be diagnosed if PaO2 is within the range of PaO2 7.3-8kPa
2. nocturnal hypoxia
3. peripheral oedema
4. pulmonary hypertension
What is the best management for people who are "at risk" for COPD?
What is the best treatment option for people who are symptomatic for COPD?
What is the best treatment option for people who are exacerbated for COPD?
What is the best treatment option for people who are in respiratory failure?
other options as disease has progressed too much
What is the main cause for exacerbations?
What are the 6 main COPD exacerbation signs?
1. increasing breathlessness
3. sputum volume
4. sputum purulence (pus containing)
6. chest tightness
What are 4 main treatment options for managing acute exacerbating COPD? (AECOPD)
1. short acting bronchodilators
4. consider hospital admission if not well
What 2 short acting bronchodilators are used in AECOPD?
(Nebulisers if cannot use inhalers)
What steroid is used to manage AECOPD and what is its dose and time period?
Prednisolone, 40mg per day for 5-7 days
When are antibiotics used in AECOPD?
If there is evidence of infection (fever or increase in volume/ purulence of sputum)
When would you consider hospital admission in AECOPD? (3)
2. low oxygen saturation (<90-92%)
3. hypotension etc
What investigations are required for patients admitted to hospital with AECOPD? (8)
1. full blood count
2. biochemistry and glucose
3. theophylline concentration
4. arterial blood gas (documenting the amount of oxygen given and by what delivery device)
6. chest x ray
7. blood cultures in febrile patients
8. sputum microscopy, culture and sensitivity