RESPIRATORY SYSTEM Flashcards
what is the prevalence of acute asthma in children and young adults?
a) 5%
b) 15%
c) 25%
d) 35%
b) 15%
is acute asthma more common in developed or developing countries?
developed
what is the name for chronic inflammation of the large airways?
bronchospasm
name one hypothesis for the development of asthma
hygeine
what antibody mediates an asthma allergic reaction?
IgE
name 5 cells which are recruited during an asthma attack
mast cells dendritic cells eosinophils lymphocytes T helpers
what epithelial and basement re-modelling occurs in asthma?
loss of cilia
increase of mucus cells
thickened basement membrane
what happens to smooth muscle in the airways in chronic asthma?
hyperplasia from chronic infection
What are the four main symptoms of worsening asthma?
SOB at night
Wheeze at night
Cough
Chest tightness
what would occur upon percussion of a patient with asthma?
hyper resonance
is the airway obstruction of asthma reversible or irreversible?
reversible
what 4 things cause bronchial inflammation in asthma?
infiltration of immune cells
muscle hypertrophy
mucus plugging
epithelial damage
What are the signs of acute asthma attack?
PEFR <35%-50% RR= >25 HR=> 110pbm Can't speak full sentance Cyanotic
What is the signs for fatal asthma attack?
PEFR <35%
Poor respiratory effort and silent chest sound
Pa02= <8
O2 sats= 92% on air
Unconsciousness and arrhythmia may be present
What is the atopic triad commonly seen in medical/family history of a patient with asthma?
The patient or within the family they are suffering from
Eczema
Asthma
Hay fever
give 4 examples of exacerbating factors for asthma
cold air exercise allergens pets existing atrophy acid reflux
what is the difference between intrinsic and extrinsic asthma?
intrinsic = no known cause (chemical/exercise induced) extrinsic = allergen
what two measurement test might you recommend for a patient with suspected asthma?
peak expiratory flow
spirometry
what type of drug is salbutamol and terbutaline and how are they administered and how often?
beta agonist
inhaled
short acting up to 4x daily
Give an example of an inhaled steroid for asthma or COPD
Corticosteriods such as beclometasone, fluticasone and budesonide
why are inhaled steroids given for asthma and how often are they administered?
prevention
two times daily
give 3 side effects of inhaled steroids
reduced bone mineral density
growth failure
adrenal suppression
oral candida
What is the treatment for acute asthma attack?
O SHIT ME
Oxygen 15L non rebreathable mask
Salbutamol 5mg Nebulizer ( change oxygen to 6L/8L) = every 15-20 minutes
Hydrocortisone 200mg Iv or prednisolone 40mg oral
Ipratropium bromide Iv 0.5mg 4-6 hours
Theophylline
Magnesium Sulphate 2g Iv
Extra help
how many people are affected by COPD in the UK?
a) 50
b) 50,000
c) 500,000
d) 1.5 million
d) 1.5 million
what 2 things is COPD a combination of?
emphysema (pink puffer) and chronic bronchitis (blue bloaters)
how does COPD lead to air collapse?
emphysema causes loss of elasticity and loss of alveoli
how can a patient with COPD get blocked airways?
increased goblet cells and mucus secretion
why does a COPD patient get lung hyperinflation and shortness of breath?
narrowing of small airways and trapping of air
what is the major cause of COPD?
smoking
give 2 minor causes of COPD
infections a1-antitrypsin deficiency Air pollution (motor vehicles) Occupational pollution ( dust, chemicals)
why does a1-antitrypsin deficiency cause COPD?
Occurs in emphysema and a1 antitrypsin protects lungs from elastase enzyme. when there is a deficiency, the lungs are destroyed by elastase. Lower lobes are more severely affected
is COPD reversible or irreversible?
irreversible
What are the general symptoms of COPD?
Recurrent infections SOB Fatigue Productive cough Fever
what chest abnormality might you see with a patient with COPD?
barrel chest
give 2 examples of behavioural abnormalities of a patient with COPD in an attempt to ease shortness of breath
pursed lip breathing
tripod positioning
use of accessory muscles
how long do symptoms have to be present for a diagnosis of COPD to be considered?
more than 3 months
What is the FEV1:FVC ratio in a patient with COPD?
Less than 0.7
name 2 things you might see on a chest X-ray of a patient with COPD
hyperinflation
enlarged pulmonary vessels
name something which you might see on an ECG of a patient with COPD
right ventricular hypertrophy
in an ABG of a patient with COPD, the PaO2 would be ___ and the PaCO2 would be ____
PaO2 low
PaCO2 high
what treatment might you recommend for mild COPD?
ipratropium inhaler (antimuscarinic)
or
Salbutamol ( Short acting B2 agonist)
what 3 things might you recommend for moderate COPD?
ipratropium
long acting b2 agonist ( salmeterol and formoterol)
steroid (fluticasone and budesonide
what is seretide a combination of?
salmeterol (B2 agonist)
fluticasone (steroid)
what is symbicort a combination of?
formoterol (b2 agonist)
budesonide (steroid)
what is combivent a combination of?
salmeterol (b2 agonist)
ipratropium (antimuscarinic)
what 3 things would you recommend as combination therapy for severe COPD?
long acting beta 2 agonist (salmeterol)+
long acting antimuscarinics (tiotropium) +
Inhaled steroids
what drug might you prescribe to reduce inflammation and relax smooth muscle in severe COPD?
theophylline
how would you treat theophylline toxicity?
beta blockers
give 3 cardiac complications of COPD
right sided heart failure
oedema
hypertension
give an MSK complication of COPD
osteoporosis
give a metabolic complication of COPD
weight loss
what accounts for 95% of all primary lung tumours?
bronchial carcinoma
is bronchial carcinoma more likely in men or women?
men
what makes up 15-20% of bronchial carcinomas?
small cell calcer
SCC is a cancer of what cells?
Kulchitsky cells (endocrine)
what do kulchitsky cells do?
secrete polypeptide hormones
how do kulchitsky cells stimulate tumour growth?
secretion of polypeptide hormones
do SCCs metastasise early or late?
early
is the prognosis of SCCs good or bad?
bad - inoperable at presentation
what makes up 40% of NSCCs?
squamous/epidermoid= flat cells near the centre of the lungs presenting which cause bronchial blocking and infeciton
what makes up 42% of NSCCs?
adenocarcinomas= mucus gland cells in bronchial epithelium which invades lymph nodes and pleura
what makes up 10% of NSCCs?
large cell cancer
large cell carcinomas are _____ differentiated and metastasise _____
poorly
early
What are the common symptoms of bronchial carcinoma?
Chest pain* Haemoptysis* Cough* Dysponea and sob* Weight loss and fatigue * Malaise Slow resolving infection/pneumonia
what is the main risk factor for the development of bronchial cancer?
smoking
give 2 other risk factors for the development of bronchial cancer
urban areas
occupation
name 2 peripheral signs you might see relating to lung cancer
clubbing
weight loss
what medical imaging technique might you suggest for diagnosis of bronchial cancer?
CT (MRI not useful)
if during a bronchoscopy you noticed that there was a loss of the sharp angle of the carina, what might you suspect?
mediastinal lymph node involvement
why might you perform a full blood count in suspected bronchial cancer?
anaemia of malignancy
why might you perform LFTs in suspected bronchial cancer?
liver metastases
is prognosis better for NSSCs or SCCs?
NSSCs
give 4 examples of where bronchial cancer can directly spread
pleura ribs brachial plexus hilar region phrenic nerve oesophagus pericardium
give 3 common metastatic sites for bronchial cancer
bone
brain
liver
adrenal gland
give 4 examples for benign tumour that can exist in the lung
pulmonary harmatoma bronchial adenoma chondroma lipoma mesothelioma tracheal squamous papilloma
give 2 circulatory complications of bronchial cancer
superior vena cava obstruction
pericarditis
AF
which gender are more likely to get a pneumothorax?
males
Who commonly develops spontaneous pneumothorax?
Tall thin white boys
what could cause a spontaneous pneumothorax?
rupture of subdural bulla
what is a major cause of pneumothorax?
chest trauma
give 3 rare, chronic respiratory causes of pneumothorax
asthma
COPD
CF
give 2 infective causes of pneumothorax
TB
pneumonia
give a systemic, connective tissue, inflammatory cause of pneumothorax
sarcoidosis= production of granulomas in the body in response to inflammation
give 2 inherited causes of pneumothorax
marfan’s
ehlers-danlos
give a rare, more serious cause of pneumothorax
cancer
CVP line, pleural aspiration and biopsy are all examples of _____ causes of pneumothorax
iatrogenic
why does pneumothorax occur?
negative pressure in lungs is lost and the lungs partially deflate - air is sucked into cavity through valve causing lung compression
pneumothorax can be described as ____ onset ____ pain
sudden onset
pleuritic pain