Respiratory Medicine Flashcards
Define
Dyspnoea:
Exertional Dyspnoea:
Paroxysmal Nocturnal Dyspnoea:
Dyspnoea: Shortness of breath
Exertional Dyspnoea: Shortness of breath on exertion
Paroxysmal Nocturnal Dyspnoea: Acute shortness of breath awakening patient from sleep.
Define Orthopnoea?
What is it associated with
Dypsnoea on lying flat, relieved by sitting up.
Left heart dysfunction, pulmonary oedema, and cor pulmonare
Paroxysmal nocturnal dyspnoea is the acute shortness of breath awakening a patient from sleep. The patient would need to sit up or get out of bed for relief. What is this associated with?
pulmonary oedema and cor pulmonare
What is the normal RR for different ages?
<1yo - 30-40
1-5 - 25-35
5-12 - 20-25
12+ 12-20
Give 1 cause of increased RR from each of the following categories
Lung disease:
Heart disease:
Metabolic:
Drugs:
Psychological:
Then give 4 causes of reduced RR
Lung disease: Pneumonia, asthma
Heart disease: LVF
Metabolic: Ketoacidosis
Drugs: Salicylates
Psychological: Anxiety
Reduced RR:
CNS disease: Brainstem lesions, Guillain barre
Neuromuscular disease (myasthenia gravis)
Opioids
Kyphoscoliosis (limits chest expsnsion)
Give 20 ddx for Dyspnoea (good luck!)
Cardiac:
Acute: Arrhythmia (A.fib), MI, LVF, Aortic dissection, pericarditis, tamponade
Chronic: Congestive cardiac failure, valvular disease, Congenital heart disease
Resp:
Acute: Asthma exacerbation, COPD exacerbation, pneumonia, PE, pneumothorax, pleural effusion, upper airway obstruction
Chronic: Asthma, COPD, CF, Lung Ca, Mesothelioma
Other:
Acute: Ketoacidosis (Kussmaul breathing), MSK pain (costochondritis), oesophagitis/pain, salicylates, thyrotoxicosis
Chronic: Obesity, anemia, neuromuscular
Define Kussmaul breathing
Deep, sighing breathing due to metabolic acidosis commonly seen in diabetic ketoacidosis.
Define Cheyne-Stokes Respiration
What is it caused by?
Breathing gets progressively deeper and shallower +/- episodic apnoea
Caused by brainstem lesions/compression (stroke/TIA), pulmonary oedema
Neurogenic hyperventilation is one of the causes of dyspnoea. What are examples of this?
Stroke, tumour, CNS infection. This puts pressure on the brainstem => Cheyne-stokes respiration
Give 7 ddx for acute Dyspnoea + Chest pain
Cardiac: MI, Pericarditis, dissecting aneurysm
Resp: PE, pneumonia, pulmonary malignancy
Other: MSK pain/Costochondritis, oesophageal pain/spasm/itis
How can a pulmonary malignancy cause acute chest pain and SOB?
Superior vena cava obstruction
How does superior vena cava obstruction present
Remember the cause would be a pulmonary malignancy
=> Obstruction: Acute breathlessness + headache worse on stooping + Swelling of face and neck (increased ICP)
+
=> Malignancy: Haemoptysis, unexplained cough, reduced weight and appetite, fatigue
What timeframe would be considered an acute cough?
Acute cough <3 weeks => chronic is >3 weeks
Give 5 causes of acute and 5 causes of a chronic cough
Acute:
1) URTI
2) Croup
3) Bronchitis
4) Acute exacerbation of COPD/Asthma
5) Tumour
6) Pneumonia
Chronic:
1) Post-nasal drip
2) Post-viral
3) COPD/Asthma
4) Lung Ca
5) TB, Pertussis
6) Bronchiectasis
7) Cystic fibrosis
8) Pulmonary oedema
9) GORD!
10) ACEinhibitors
11) Smoking
You ask for a sputum sample from the patient with a cough. What does each of the following sputum samples indicate?
Clear:
Black specks:
Yellow-green:
Pink Froth:
Clear: Normal saliva, maybe test for Tb
Black specks: Smoking
Yellow-green: Bronchiectasis, cellular debris (infection)
Pink Froth: Pulmonary oedema => do CXR
Blood in sputum always requires investigation => requires urgent referral or emergency admission. Give 5 causes of Haemoptysis
1) Infection (bronchitis, abscess Tb)
2) Lung Ca/Bronchial adenoma
3) PE
4) Anticoagulation (iatrogenic)
5) Trauma (violent coughing)
6) Cardiac (acute LVF, Mitral stenosis)
7) Collagen vascular disease e.g. Wegner’s/polyangitis with granulomatosis
8) Good Pasture’s Syndrome
9) Bronchiectasis!
Bronchiectasis is the permanent widening of the bronchioles due to chronic inflammation and infection. What is the typical presentation of a patient with bronchiectasis?
Include Examination findings
Mild: Asymptomatic with prolonged winter exacerbations (fever cough, purulent green sputum, pleuritic chest pain, dyspnoea)
Moderate/severe: Persistent or recurrent chest infection, haemoptysis, clubbing, inspiratory/exp. crackles + wheeze
What are the causes of bronchiectasis
1) Cilia => CF, PCD, Kartagener syndrome, smoking
2) Post-infection: TB, Pertussis, measles, pneumonia
3) Other: Bronchial obstruction, gastric aspiration, aspergillosis
What investigations would you perform on a patient presenting with recurrent chest infections on a background of CF? What is the gold standard for diagnosis?
Chest Xray
CT chest (gold standard)
What is involved in the management of bronchiectasis
Referral to resp physician
Chest physiotherapy
Antibiotics
Bronchodilators
Vaccination for influenza and pneumococcus.
Define Asthma
Asthma is a condition of paroxysmal, reversible airway obstruction characterized by
1) Reversible airflow limitation
2) Airway hyper-responsiveness to wide range of stimuli
3) Inflammation of the bronchi
What are the symptoms of Asthma along with characteristic features
These features allow for clinical suspicion of asthma. What are the diagnostic tests you would perform to complete the diagnosis?
1) Recurrent episodic asthma symptoms: Wheeze, breathlessness, chest tightness, cough
2) Diurnal variability
3) Audible expiratory wheeze
4) Variable airflow obstruction (PEFR)
Diagnosis:
1) Spirometry demonstrating reversibility
2) FBC showing raised eosinophils
3) CXR showing hyperinflation and bronchial thickening
How is spirometry conducted?
What findings would be consistent with the diagnosis of asthma?
Spirometry is conducted initially to achieve baseline. 400mcg of salbutamol (SABA) is then given via a spacer. Spirometry is then conducted again 20 minutes later.
200+ increase in PEFT suggests asthma
400+ is a strong indication
Alternatively this can be tested before and after a 6 week trial of BD beclomethasone.
What is the difference between spirometry and peak flow
Spirometry allows you to measure all the components of breathing (vital capacity, tidal flow…). Peak flow is not as comprehensive and only measures the maximum speed of airflow during expiration. It is useful in monitoring.
What is occupational asthma and how would you enquire about it in the history?
Occupational asthma is reversible airway obstruction due to the work environment such as in factories
Breathing better when on holidays or days away from work?
What is the diagnostic definition of airflow obstruction?
FEV1/FVC <0.7
Give 6 differentials for airway obstruction (FEV1/FVC <0.7)
Asthma
COPD
Foreign body
Lung Ca
GORD
HF/pulmonary oedema
Pulmonary fibrosis
Bronchiectasis
Sarcoidosis
Hyperventilation syndrome
How would you identify a severe asthma attack/exacerbation?
How would you correctly identify if it is life threatening?
Severe asthma:
PEFR 33-50%
O2 Sat >92%
Unable to complete sentences
Tachypnea/tachycardia
Life Threatening
PEFR <33%
O2 Sat <92%
Altered conciousness
Cyanosis
Hypotension
Exhaustion
Silent chest
Tachycardia
What questionnaire is used to objectively measure asthma control
RCP3 questionnaire
What advice would you give an asthmatic patient as part of your conservative management?
Allergen avoidance
Correct technique of spacer
Medication adherence
Weight loss (a/w improved sx)
Tailored action plan in case of exacerbation
Advice for vaccination for exacerbation prevention