Respiratory Flashcards
What is asthma
Chronic airway inflammation that causes episodic exacerbations of bronchoconstriction
What is asthma charecterised by
- Reversible airflow limitations
- Airway Hyper-responsiveness
- Brobchial inflammation
What are the 2 groups os asthma
- Eosinophillic
- Non eosinophillic
What are the 2 types of eosinophillic asthma
Atopic
- Fungal allergy
- Common aeroallergens
- Occupational
- Pets
Non - atopic
What are the 3 types on non-eosionophillic asthma
- Non smoking non eosinophillic
- Smoking assosciated
- Obesity related
What are triggers for asthma
- Infection
- Cold air
- Animals
- Excercise
- Cold/damp
Asthma presentation - Sx
- Dry cough
- Wheeze
- S.O.B
- Chest tightness
Asthma presentation - signs
- Bilateral polyphonic wheeze
- Prolonged expiratory time
- Hyperinflated chest
- Diurinal variability -worse at night
Asthma investigations
1st -
Spirometry -with reversibility
Peak air flow - 2x per day
CXR - hyperinflation in acute attack
Asthma conservative management
- Avoid smoking and allergens
- Loose weight
- Avoid triggers (NSAIDs)
- Yearly asthma review
- Yearly influenza vaccination
Asthma Medical management
1 - SABA (Salbutamol)
2 - SABA + ICS
(Budoneside)
3 - SABA + ICS + LABA
(Salmeterol)
Function of beta agonists
- Bind to B2 receptor on lungs
- Increase CAMP
- Relaxation
- Bronchodilation
Similar to adrenaline and noradrenaline
What is bronchiectasis
Permanent dilatation of bronchi and bronchioles due to destruction of elastic and muscualr comonenets of bronchial wall
What are the causes of bronchiectasis
Recurrent infections secondary to underlying conditions
Bronchial damage
- Pneumonia
- WHooping cough
Cystic fibrosis
Bronchiectasis presnetation - Sx
Cough
- Green purulent sputum
- Intermitent haemoptysis
Breathlesness
Wheeze
Fatigue
Bronchiectasis presentation - signs
- Clubbing
- Bilateral coarse crackles
- High pitch inspiratory wheeze
Bronchiectasis investigations - Gold standard
HRCT
- Airway dialtation
- Bronchial wall thickening
- Bronchial wall cysts
Bronchiectasis investigations
CXR
- Cystic shadows
- Thickened bronchial walls
Sputum culture
Spirometry
- Obstructive pattern
Bronchiectasis management
Mucolytics - Dornase aplha
Respiratory physio
Antibiotics
Pneumococcal and Flu vaccination
What is COPD
Non reversible long term deterioration in airflow through the lungs caused by damage to lung tissue
What is COPD charecterised by?
Airway obstruction
Airway limitation
COPD causes
- Smoking ( > 20 pack years)
- Chrnoic exposure to pollutants
- Alpha 1 antitrypsin deficiency
What is chronic bronchitis
Cough with sputum for 3 months for 2 consecutive years
Pathophysiology of chronic bronchitis
- underlying inflammation
- Mucous hypersecretion
- Inflammatory oedema
- Scarring and thickening
- Airway narrows
What is emphyesema
Dilatation and destruction of lung tissue distal to terminal bronchioles
Pathophysiology of emphysema
- Elastin breakdown due to inflammation
- Loss of elastic recoil
- Air trapped in lungs
- exhalation through pursed lips
Histological presentation of emphysema
Enlarged air spaces distal to terminal bronchioles with alveolar destruction
When should you suspect COPD Dx
- Long term smoker
- Chrnoic SOB
- Cough
- Sputum
- Wheeze
- Recurrent infections - winter
Chrnoic bronchitis presentation
- productive cough >3m for 2 years
BLUE BLOATER
- Central cyanosis
- reduced excercise tolerance
- Abnormal auscultation
- Dyspnoea at rest
Emphysema presentation
PINK PUFFER
- CO2 retention
- Barrel chest
- Pursed lips
- Non productive cough
- Use of accessory muscles of inspiration
COPD management - conservative
- smoking cessation
- Pneumoccocal and influenza vaccine
COPD management - medical
- SABA
No asthmatic/ No steroid responsive features
- LABA + LAMA
Asthmatic / steroid responsive features
- LABA + LAMA + ICS
O2 targets for COPD patients
88-92%
COPD exacerbation
- Community
- Hospital
Community
- Strep pneumoniae
- Influenza
Hospital
- Pseudomonas aeruginosa
Small cell lung cancer
- association
Stong assosciation with smoking
what can a Small cell lung cancer lead to
Paraneoplastic syndromes due to release of neurosecretory granules
ACTH –> Cushings
ADH –> SIADH
Tumour Auto-Ab –> Lambert-eaton myasthenic syndrome (NMJ attacked)
Non small cell lung cancer subtypes
- Squamous cell
- Large cell
- Adenocarcinoma
Squamous cell carcinoma
- assosciation
- name 2 things produced by the tumour
- Strongly assosciated with smoking
- Keratin production
- PTH secretion –> Hypercalcaemia
Adenocarcinoma
- assosciation
- STRONG assosciation with Asbestos
- more common in non smokers
What is a Pancoast tumour
and what is the presentation
Tumour of lung apex
compression of B.V and nerves
- Thoracic duct –> Upper arm swelling
- Brachial plexus –> Weakness in hand muscles
- SNS –> Horners syndrome
What is horners syndrome
- anhyrosis
- partial ptosis
- miosis
Lung cancer presentation
- cough ( > 3wks –> CXR)
- SOB
- Haemoptysis
- Clubbing
- Chest pain
- WL / fever / night sweats
- Recurrent infections
- Pleural effusions
Sx of mets
- Bone pain
- Seizures
- Hepatic pain
- Abdo pain
- Headache
- Neurological defecit
1st line Lung cnacer investigations
CXR
- Hilar enlargement
- Peripheral opacity
- Pleural effusion
- Collapse
Sputum cytology
Contrast enhanced CT CAP - staging
2nd line Lung cancer investigations
PET-CT - increases metabolic activity
Bronchocscopy with biopsy
Presentation of RLN palsy in Pancoast tumour
- Hoarse voice
- Bovine cough
SVC obstruction in Pancoast tumpur presentation
- Facial swelling
- Difficulty breathing
- Distended neck veins
What is pemberton’s sign
- Raise hands above head
- Facial congestion and cyanosis
- Obstruction of SVC by pancoast tumour
Pleural effusion
- Transudative
- protein content
- causes
- LESS protein
Increased hydrostatic pressure or decreased oncotic pressure
Pleural protein <3g/dL
Causes:
- CCF
- Hypoalbuminaemia
- Hypothyroidism
- Meig’s syndrome
PLeural effusion
- Exudative
- protein content
- causes
- MORE protein
Increased leakiness of pleural capillaries due to infection or inflammation
Pleural protein >3g/dL
Causes:
- Lung cancer
- Pneumonia
- TB
- Rhematoid arthiritis
Pleural effusion Sx
- SOB
- Dyspnoea
- Pleurisy
- Dry non productive cough
Pleural effusion signs
- exmaination
- ausculation
- percussion
- tracheal deviation
- decreased chest expansion
- Diminished breath sounds
- Decreased tactile fremitus
- Dullness to percussion
Pleural effusion investigations
CXR
- Meniscus - large
- Blunting of costaphrenic angles - small
Thoracocentesis
- Lights criteria
- Red cell count
- LDH count
- Protein count
Where do you insert a chest drian
triangle os safety
- Lateral boarder of pec major
- Anterior boarder of Lat dorsi
- Lateral level of the nipple
When to suspect empeyema
Infected pleural effusion
- Pt with improving pneumonia but new/on going fever
Name 3 causes of CAP
- Strep pneumonia
- Hameophillius influnzae
- Mycoplasma pneumonia
Name 3 causes of HAP
- S.Aureus
- Psedomonas aeruginosa
- Klebsiella pneumonia
Fungal Pneumonia
- causes
- presentation
- Tx
Pneumocytisis jiroveci
- Immunocompromised Pts
Dry non productive cough
SOB on exertion
Night sweats
Co-trimoxazole
Pneumonia presentation
- SOB
- Productive cough
- Haemoptysis
- Fever
- Pleuritic chest pain
- Delerium
Sign of Strep penumonia infection - CAP
Rusty coloures sputum
Pneumonia signs
- examiantion
- percussion
- auscultation
Tachypnoea
Tachycardia
Hypoxia
Dull percussion note
Increased vocal fremitus
Bronchial breath sounds - consolidation
Focal coarse crackles
Pneumonia severity assessment
CURB - 65
Confusion
Urea - > 7
Resp rate - >30
BP -
- < 90 Systolic
- < 60 diastolic
Age - > 65
Pneumonia CURB score results
0-1 –> PO Abx + Home tx
2 - consider admission
3 - severe –> ICU
Pneumonia investigations
CXR
- Consolidation
Sputum
- gram stain
- culture
- sensitivity
Bloods
Abx -
CURB (0-1)
Oral therapy
- Amoxixillin
Penecillin allergy
Doxycycline / clarithromycin
Abx
CURB (2)
Oral therapy
- Amoxicillin + Clarithromycin
Abx
CURB (3)
IV therapy
Co-amoxiclav + Clarithromycin
What is a pneumothorax
Air in pleural space leading to partial or complete lung collapse
Name 3 causes of a spontaneous pneumothorax
Primary - Young pts with no known resp illnesses
- Marfans
Secondary - Pts with pre-exisitng resp illnesses
- COPD
- CF
- Sarcoidosis
Name 3 causes of tramuatic pneumothorax
- tension - stab wound
- pleural aspiration
- pleural biopsy
- infection
Non tension penumothorax presentation
Sx
- dyspnoea
- pleuritic chest pain
- breathlessness
Non tension pneumothorax signs
percussion
- Hyper resonant
Aucultation
- decreased breath sound s
Examiantion
- decreased chest expansion
tension pneumothorax signs
Distended neck veins tracheal deviation reduced air entry hypotension tachycardia
Tx of tension penumothorax
Insert large bore needle with syringe filled with 0.9% sailine into 2nd intercostal space mid clavicualr line
Pulmonary embolism
what does a large and a small emboli cause
Large - HF and cardiac arrest
Small - intrapulmonary dead space and V/Q mismatch
Causes of hypercoagulability
- virchows triad
dehydration polycythaemia contraceptive pill - oestrogen nephrotic syndrome maignancy
What is virchows triad
hypercoagulability
stasis of blood flow
endothelial injury
Pulmoary embolism presentation
- SOB
- Pleuritic chest pain
- Haemoptysis
- Fever
- Hypoxia
- Tachycardia
- DVT
What does tachypnoea lead to in a PE
respiratory alkalosis
Pulmonary embolism investigations
1st line
- CTPA (IV contrast)
- V/Q perfusion scan
- D-dimer
- ABG
- ECG
Explain the Wells score
Risk of pt presenting with sx having a DVT/PE
Likely (>4) –> CTPA
Unlikely –> D-dimer –> Positive –> CTPA
Small PE management
- O2 + analgesia
- Enoxaparin
- Long term anti-coag
- Warfarin
- DOAC
- LMWH - pregnancy/malignancy
Large PE management
Haemodyanmic compromise (BP < 90mmHg)
Thrombolysis - STREPTOKINASE / ALTEPLASE
What is pulmonary fibrosis
chronic inflammation with scar tissue formation
Pulmonary fibrosis RF
Smoking
Infection - CMV / Hep C / EBV
Family Hx
What drugs are a RF for pulmonary fibrosis
amiodarone
Methotrexate
Ant-depressants
Nitrofurantoin
Pulmonary fibrosis presnetation
- dyspnoea
- cough - non productive and paroxysmal
- breathlesness
- resp failure
Pulmonary fibrosis signs
- clubbing
- Auscultation
Crackles - fine inspiratory basal
Pulmonary fibrosis investigations
High resolution CT
- ground glass apperance
CXR
Spirometry - restrictive
Bloods - Type 1 resp failure
Lung biopsy - exclude sarcoidosiss
Pulmonary fibrosis mangement
Medications - target fibroblastic proliferation and tissue remodelling
Prifenidone - antifibtoric and anti-inflamm (slows FVC decline)
Nintedanib - MAB targeting tyrosine kinase
Causes of secodnary pulmonary fibrosis
- alpha 1 anti-tryspin
- SLE
- R.A
- Systemic sclerosis
What is sarcoidosis
- Epidemiology
Multi-system inflammatory granulomatous disorder
- More common in Africans
- More common in females
- 2 peaks of incidence
20 + 60
Sarcoidosis presentation
- progressive dyspnoea
- dry cough
- haemoptysis
- chest pain
- arthralgia
- fever
- weight loss
- fatigue
Sarcoidosis investigations
CXR
- BHL
- Reticular opacities
High resolution CT
- lymphadenopathy
- diffuse nodularity
FBC
- Increased ACE
- Hypercalcaemia
Bronchoscopy + biopsy
Gold standard for sarcoidosis
Bronchoscopy with biopsy and histology
- Non caesiating granuloma with epitheliod cells
When is tx required for sarcoidosis
eye involvement
hypercalcaemia
extra - pulmonary sx
Sarcoidosis Tx
Oral steroids - Prednisolone
- bisphosphonates prophylacitcally prescirbes
Mehtotrexate / Azathioprine
Lung transplant
Sarcoidosis organ involvement lungs liver eyes skin kidneys bones CNS
BHL
pulmonary fibrosis / nodules
liver nodules
cirrhosis
cholestasis
uveitis
conjunctivitis
optic neuritis
erythema nodosum
lupus pernio - raised purp;e skin lesions
kidney stones - hyeprcalcaemia
nephroclacinosis
Arthralgia
arthiritis
Encephalopathy
Diabetes insipidus
What causes TB infection
- describe the organism
Mycobacterium tuberculosis
Aerobic bacilli
ACID FAST - Red with Zehil neelsen stain
Signs of systmeic milliary TB
Kidney - sterile pyuria
Menigitis
Adrenals - Addisons
What is the vaccine for TB
BCG Vaccine
- following -ve Mantoux test + immunosuppresion checking
- given to high risk pts
TB presentation
Pulmonary TB - cough > 3 weeks - Haemoptysis - chest pain - breathlesness Fever Weight loss Night sweats Erythema nodosum Lethargy
TB investigations
CXR
Sputum (x3)
- stain and microscopy
- culture
FBC
TB appearnce on CXR
primary
- patchy consolidation
- pleural effusion
reactivated
- nodualr consolidation with cavitation (upper lobes)
dissmeinated
- millet seeds
what is the interferon gamma test
used in pts with no features of active TB but +ve mantoux test
TB management
RIPE Rifampicin - 6m Isoniazid - 6m Pyrazinamide - 2m Ethambutol - 2m
Pyridoxine
MOA + S/E Rifampicin
Inhibits RNA polymerase
blocks protein synthesis
Red/orange - tears / urine
CYP450 inducer - contraceptive pill reduced effect
MOA + S/E Isoniazid
Blocks mycolic acid synthesis
Peripheral neuropathy
S/E Pyrazinamide
Hyperuricaemia –> GOUT
S/E Ethambutol
Colour blindness
Reduced visual acuity
Salbutamol inhaler S/E
- FIne tremor
- Tachycardia
- hypokalaemia
ICS S/E
Oral candida
Stunted child growth
what do small cell lung cancers release
PT-hrp –> Hypercalcaemia
Percussion examples of:
- dullness
- stony dullness
- hyper resonant
tumout
infection
consolidation
collapsed lobe
pleural effusion
pneumothorax
TVF Examples of:
- increased volume
- decreased volume
Consolidation
Tumour
Lobar collapse
Pneumonia
Pleural effusion
Pneumothorax
What would reduced breath sounds indicate
reduced air entry into that region of the lung
- pneumothorax
- pleural effuision
What would fine insipiratiry end crackles indicate
pulmonary fibrosis
What would a wheeze indiate
asthma
copd
bronchiectasis
What would coarse crackles indicate
pneumonia
bronchiectasis
pulmonary oedema
Obstructive lung disorders
COPD Asthma Emphysema Bronchiectasis CF
Restricitve lung disorders
Fibrotic lung disease
- pulmonary fibrosis
- pulmonary oedema
- obesity
- preganancy
- MND / Guillian barre
Obstructive pattern
FEV1 < 80 predicted
Ratio < 70%
Restrictive pattern
FEV1 < 80%
FVC < 80%
Ratio > 70%
What is Type 1 resp failure
Hypoxaemaia - Low PaO2
Normocapnia - Normal CO2 ( or can be low)
Causes ot Type 1 respiratory failure
V/Q mismatch
- pulmonary oedema
- pulmonary embolism
- pulmonary HTN
- Pneumonia
What is type 2 resp failure
Hypoxaemia - Low PaO2
Hypercapnia - High PaCO2
Causes of type 2 respiratory failure
Alveolar hypoventilation
- COPD
- Asthma
- Obesity
- Rib fractures
- Guillian barre syndrome
- MND
- Opiates
Causes of respiratory alkalosis
- Anxiety
- Pain
- PE
- Pneumothorax
Hypercapnia sx
- Bounding pulse
- Asterixis
- Decreased consciousness
- Confusion
Acute pulmonary oedema tx
Furosemide
GTN
Oxygen
Diamorphine
Causes of clubbing
- lung
- cardiac
- GI
cystic fibrosis lung cancer bronchiectasis infective endocarditis IPF Mesothelioma
Cirrhosis
Chrons
UC
Coeliac
ACEi adverse effects
Hypotension
dry cough
hyperkalaemia
renal failure
ARBs adverse effects
hypotension
hyperkalaeia
renal failure
ARBs examples
Candesartan
Losartan
Irbesartan
Causes of a bounding pulse
CO2 retention
Aortic regurgitation
Causes of raised JVP
- lung
- cardiac
Venous HTN - Right sided HF
- COPD
- Interstitial lung disease
Cor pulmonale
Tricuspid regurgitation
Constrictive pericarditis
CCF
Causes of pulsus paradoxus
Cardiac tamponade
Severe acute asthma
Severe exacerbation of COPD
Tracheal deviation - away from side of pathologu
Tension pneumothorax
Large pleural effusions
Tracheal deviation - towards side of pathology
Lobar collapse
Fibrosis
Causes of decreased cricosternal distance
Hyperinflation
- Asthma
- COPD
Causes of dullness to percuss
Consolidaion
tumour
lobar collapse
Causes of stony dullness
Pleural effusions
Causes of hyper-resonance
Decreased tissue density -
Pneumothorax
Increased vibration on tactile vocal resonance
Consolidation
Tumour
Lobar collapse
Decreased vibration on tactile vocal resonace
Pleural effusion
Pneumothorax
Causes of bronchial breath sounds
Consolidation
Respiratory causes of lymphadenopathy
Lung cancer
TB
Sarcoidosis
Respiratory cause of erythema nodosum
Sarcoidosis
Causes of coarse crackles on auscultation
Chronic bronchitis
Pneumonia
Causes of a wheeze
Asthma
Bronchiectasis
COPD
Causes of a plethoric complexion
CO2 retenion
Polycythaemia - COPD
Causes of symmetrical reduced chest expansion
Pulmonary fibrosis
Causes of coarse crackles on auscultation
pneumonia
bronchiectasis
pulmonary oedema
Causes of serous sputum
- frothy
- pink
- clear
Pulmonary oedema
Cancer
Causes of mucoid sputum
- clear
- grey
- white
Chronic bronchitis
COPD
Asthma