Respiratory Flashcards
What is acute bronchitis
short term inflammation of the bronchi
common causative agent (3) of acute bronchitis
viral infection typically RSV, Rhinovirus and influenza
Pathophysiology of Acute bronchitis
Damage causes irritation leading to inflammation of airways and lead to neutrophil infiltrating the lung tissue
Risk factors (3)
Tobacco smoke
dust
air pollution
Signs and symptoms
Dyspnoea
Cough
wheeze
chest discomfort
Fever
Fatigue
Malais
Investigation for acute bronchitis
pulse oximetry
CRP
Chest x-ray
Management for acute bronchitis
self-limiting
if bacterial suspected then antibiotics
Complication of acute bronchitis
pneumonia
What is bronchiolitis
it is an acute viral infection of the lower respiratory tract that occurs primarily in the very young and affects small airways
Common pathogen that causes acute bronchiolitis
RSV
Pathophysiology of acute bronchiolitis
occurs when virus infect terminal bronchiolar epithelial cells, causing inflammation in small bronchi and bronchioles
Risk factors for acute bronchiolitis
attendance at nursery
fall/winter time for kids
overcrowding
prematurity
Signs and symptoms of acute bronchiolitis
persistent cough
tachypnoea
chest recession
wheezing
rales
investigation for acute bronchiolitis
FBC, CRP, CXR (if needed)
Indication of hospitalisation for acute bronchiolitis
Toxic appearance, lethargy, dehydration, apnoea
RR>70
Hypoxia (<92%)
A&E management for acute bronchiolitis
inhaled bronchodilator
IV fluid
O2
Intubation
Nasal suctioning
Complication for acute bronchiolitis
cyanosis
dehydration
low o2 levels
What is acute epiglottitis
Inflammation of the epiglottis
Life threatening and can lead to irreversible loss of the airways due to laryngospasm
Some examples of pathogens that cause acute epiglottitis
streptococcus spp, Staph aureus, haemophilus influenza type b(Hib)
Risk factors for acute epiglottitis
Male
Weakened immune system
Lack of Hib vaccination
Signs and symptoms of acute epiglottitis
Muffles voice
Hoarse cry
Stridor
Drooling
Fever
tripoding
Investigation for acute epiglottitis
Lateral neck xr-thumbprint signs
Management for acute epiglottitis
Emergency referral
Airway management
Mange symtoms
Gold standard- refer laryngoscopy
Complication of acute epiglottitis
abscess formation
meningitis
sepsis
pneumothorax
What is asthma
A reversible chronic respiratory condition associated with airway inflammation and hyper-responsiveness
what is the pathophysiology of asthma
exposure to irritants -> inflammatory response -> effect on airways
Risk factors for asthma
Genetic
environmental
stress
medication
Prenatal smoking
occupation
Diet and nutrition
Signs and symptoms of non-acute asthma
wheeze
cough sob
chest tighness
Signs and symptoms of acute asthma
Fatigue
Interrupted sentences
us of accessory muscles
cyanosis
Pulse rate in acute asthma
tachycardia
Resp rate in acute athma
tachypnoea
Chest observation in acute asthma
wheeze
rubbing
reduced breath sounds
Oxygen sat in acute asthma
hypoxaemia
Signs and symptoms in viral induced wheeze
upper resp viral symptoms
polyphonic wheeze on auscultation
nasal flaring
intercostal recession
tripoding
Diagnosis criteria for non-acute asthma
Presence of more than one symptoms
FEV1/FVC ration of less than 70%
BRD test - shows improvement of FEV1 of 12% and increase in volume of at least 200ml
FeNO result of 40ppb or higher
PEF helps diagnose
Moderate acute asthma criteria (3pts) in adults
increasing symptoms
PEF> 50-75 best or predicted
No features of acute severe asthma
Severe acute asthma (4 pts) in adults
pef 33-50% best or predicted
RR- >25/min
HR->110/min
inability to complete sentences in one breath
Life threating asthma (10 pts) in adults
PEF <33% best or predicted
Sp02 < 92%
Pa02< 8kPa
altered conscious level
exhaustion
arrythmia
hypotension
cyanosis
silent chest
poor respiratory effort
Near fatal asthma in adults
raised PaCO2 and or requiring mechanical ventilation with raised inflation pressures
severe acute asthma in child
Spo2<92%
PEF 33-50% best or predicted
can’t complete sentences in one breath or too breathless to talk or feed
Life threatening asthma in children
Spo2 <92%
PEF< 33% best or predicted
Investigation order for asthma in adults
FeNO->spirometry ->BDR -> peak flow monitoring ->refer for other tests
Investigation order for asthma in children
Spirometry-> BDR-> FeNO-> Peak flow monitoring
Management for asthma in adults
Regular preventer (Low dose ICS)
Initial add on therapy (add inhaled LABA to low -dose ICS.
Additional controller therapies (consider increasing ICS dose or adding LTRA)
Refer to specialist therapies
Management for paediatric asthma
Regular preventer (Very low dose of ICS or LTRA for <5 yrs)
Initial add-on therapy (very low dose ICS + Child>5 -> add inhaled LABA or LTRA and for children <5 add LTRA
Additional controller therapies consider increasing ICS to low dose or children >5 add LTRA or LABA
Refer to specialist therapies
Name 3 pharmacological smoking cessation
Nicotine patch
Varenicline
Bupropion
Name 5 Nonpharmacological smoking cessation
Vaping
Community support
Counselling
Hypnotherapy
Acupuncture
What is Bronchogenic Carcinoma
primary lung cancer
They can be classified into small cell and non-small cell lung cancers
Non small more common than small cell
Risk factors for branchiogenic carcinoma
Smoking
History of cancer
exposure to harmful chemicals
Lung disease
Signs and symptoms
Cough - may be bloody
SOB
chest pain
Hoarseness
Fever
Noisy breathing
Weight loss
Slowly resolving chest infection
What to look out for in blood investigation for branchiogenic carcinoma
Anamia
Thrombocytopenia
Raised leukocytes
ESR/CRP may be raised
2 imaging to do as investigation for branchiogenic carcinoma
CXR
CT-CAP
2 special test to check for branchiogenic carcinoma
Bronchoscopy
Biopsy
4 Management for branchiogenic carcinoma
Smoking cessation
Radiotherapy
Chemotherapy
Surgery
Complications of branchiogenic carcinoma (3)
Laryngeal nerve palsy
Metastatic
Superior vena cava obstruction
Bronchiectasis
Chronic inflammation of the bronchi and bronchioles leading to permanent dilation of these airways
Some causes of bronchiectasis
Half is idiopathic but others:
Post- infection (TB, pertussis)
Congenital
Immune deficiency
Connective tissue disease
Cystic fibrosis
Fibrosis
Risk factors for Bronchiectasis
Cystic fibrosis
Host immunodeficiency
Previous infection
congenital disorders of bronchial airways
Signs and symptoms of bronchiectasis
Persistent cough
copious purulent sputum
intermittent haemoptysis
fever
finger clubbing
coarse inspiratory crepitation
wheeze
large airway Ronchi
Investigation for bronchiectasis
CXR
CT- show dilation of bronchi with or without airway thickening
Sputum culture
FBC
What is carcinoid tumour
they are neuro-endocrine tumours
commonly originate from cells in the stomach, lungs, duodenum, thymus and liver.
The bioactive substances result in diarrhoea, bronchoconstriction, skin flushing, right heart problems
What is carcinoid syndrome
Carcinoid tumour cells secrete bioactive substances like serotonin, bradykinin. These bioactive substances with physical symptoms of flushing, abdominal pain and etc is called carcinoid syndrome
Risk factor for carcinoid tumour
Family history
Signs and symptoms of carcinoid tumour
- Palpable mass
- Pain
- Weight loss.
- Skin changes (pellagra)
- Diarrhoea
What is COPD
Group of progressive obstructive lung diseases including chronic bronchitis and emphysema
Pathophysiology of chronic bronchitis
Damage to endothelium impairing the mucociliary response to clear mucus & bacteria
results in airway deformation and narrowing of the lumen limiting airflow
Pathophysiology of emphysema
Enlargement of airspaces (alveoli), leading to declining in alveolar surface area limiting gas exchange
loss of elastic recoil equals airflow limitation; loss of alveolar supporting structure leads to airway narrowing
Risk factors of COPD
- Age
- Genetics (alpha-1-antitrypsin deficiency)
- Tobacco smoke exposure (smoking & second-hand smoking)
- Smoking asthmatics
- Exposure to fumes
- Exposure to workplace irritants
6 Signs and symptoms of chronic bronchitis
Blue bloaters
Mild dyspnoea
Cyanotic
Obese
Crackles/Wheeze possible
Peripheral oedema
Hallmark of chronic bronchitis
Chronic productive cough: cough and sputum production for at least 3 months in each of 2 consecutive years.
8 Signs and symptoms of chronic bronchitis
PINK PUFFERS
Minimal cough
Pink skin, pursed lips
Cachexic
Accessory muscle use
Barrell chested
Hyperinflation
Decreased breath sound
Hallmark of emphysema
Dyspnoea
Investigation for COPD
Diagnosed by spirometry - FEV1/FVC less than 0.7
FBCs
U&Es
CRP
CXR
Sputum Culture
Nonpharmacological Management for COPD
Smoking cessation
offer pneumococcal and influenza vaccine
self-management plan
Pharmacological management for COPD with no asthma
Offer SABA or SAMA then…
if not asthmatic ->LABA or LAMA then…
if worsening symptom effecting QUALY then consider 3-month trial of LABA+LAMA+ICS
or if person has severe or moderate exacerbation within a year then consider LABA+LAMA+ICS
Pharmacological management for COPD with asthma
Offer SABA or SAMA then…
if asthmatic->LABA+ICS
then LABA+LAMA+ICS
Complications of COPD
- Respiratory infections
- Lung cancer
- Heart disease
- Pulmonary hypertension
Definition of cor pulmonale
Right ventricle failure through pulmonary artery hypertension due to a lung disorder
Pathophysiology of cor pulmonale
- Most commonly as a result of high blood pressure in the pulmonary arteries (Pulmonary hypertension)
- As a result, increased afterload causes structural problems
- Most notably hypertrophy of the right ventricle (mainly chronic)
- Because the right ventricle is a good volume pump and not a pressure pump this causes issues
- Decreased right ventricle output results in decreased left ventricle filling and therefore reduced cardiac output
- Acute cor pulmonale can be caused by pulmonary embolism (PE) or acute respiratory distress syndrome (ARDS)
Pathophysiology of cor pulmonale
- Most commonly as a result of high blood pressure in the pulmonary arteries (Pulmonary hypertension)
- As a result, increased afterload causes structural problems
- Most notably hypertrophy of the right ventricle (mainly chronic)
- Because the right ventricle is a good volume pump and not a pressure pump this causes issues
- Decreased right ventricle output results in decreased left ventricle filling and therefore reduced cardiac output
- Acute cor pulmonale can be caused by pulmonary embolism (PE) or acute respiratory distress syndrome (ARDS)
Risk factors for cor pulmonale
secondary to lung disease
Acute:ARDS, PE
Chronic: COPD
Signs and symptoms of cor pulmonale
Distended neck vein
cyanosis
raised JVP
SOB
Tiredness
Chest pain
investigation for cor pulmonale (bloods*3, imaging *3, special test *3)
Bloods
- FBC, ABG, Coag studies
Imaging
- CXR, Echocardiogram, CTPA
Special Tests
- alpha-1-antitrypsin
- Broncoscopy
- Lung Biopsy
Management for cor pulmonale
Medical(Usually initiated by secondary care)
- Treat underlying disease
- Oxygen
- Diuretics such as furosemide or Butenamide
- Vasodilate the pulmonary arteries
- Phlebotomy for severe hypoxia
Surgical
- Heart or lung transplant as last resort
Complication for cor pulmonale
- Exertional syncope
- Hypoxia
- Limited exercise tolerance
- Peripheral oedema
- Tricuspid regurgitation
- Death
What is cystic fibrosis
Cystic Fibrosis is an autosomal recessive disease caused by mutations in the CF transmembrane conductance regulator (CFTR) gene, on chromosome 7
Signs and symptoms in neonates for cystic fibrosis
Failure to thrive, meconium ileus, rectal prolapse
Resp Signs and symptoms in adults for cystic fibrosis
cough, wheeze, recurrent infections, bronchiectasis, pneumothorax, haemoptysis, respiratory failure, cor pulmonale
GI Signs and symptoms in adults for cystic fibrosis
pancreatic insufficiency, distal intestinal obstruction syndrome, gall stones, cirrhosis
Other Signs and symptoms in adults for cystic fibrosis
male infertility, osteoporosis, arthritis, vasculitis, nasal polyps, sinusitis, hypertrophic pulmonary osteoarthropathy
Investigations for cystic fibrosis
Blood spot on newborn
sweat test
genetic screening
Faecal elastase
Management for cystic fibrosis
MDT approach
What is croup
aka acute laryngotracheitis
common childhood illness caused by inflammation of the upper resp tract as a results of a viral infection
2 most responsible organism which can cause croup
parainfluenza
RSV
pathophysiology of croup
- Viral URTI causes nasopharyngeal inflammation that may spread to the larynx and trachea, causing subglottal inflammation, oedema and compromise of the airway at its narrowest portion
- Movement of vocal cords is impaired leading to the characteristic cough
Risk factors for croup
mostly effects 6mnth to 6 yrs old
genetics
4 signs and symptoms of croup
barking cough
stridor
hoarse cry
coryzal
What are the investigations for croup
Modified Westley scoring system
clinical diagnosis but o2 stats less than 95 indicated resp impairment
Management for croup
well hydrated, manage fever
dexamethasone
Nebulised budesonide
Nebulised adrenaline
complication of croup
pneumonia
pneumothorax
pulmonary oedema
dehydration
What is empyema
collection or presence of frank pus within pleural space
Pathophysiology of empyema
often due to infections post pneumonia
Begins as free flowing pleural fluid that becomes infected
Bacteria colonises the free fluid during the exudate stage when there is an increase of fluid production
which infection is most common in empyema
Anaerobic, staph and gram neg infections are most common causes
What are the risk factors for empyema
Pneumonia
endoscopy
lung abscess
alcoholism
Diabetes
COPD
Signs and symptoms of empyema
SOB
Fever and sweating
Dry cough
Chest pain upon breathing
Weight loss
Tachypnoea
Rales
Ronchi
Dullness to percussion
Investigations for empyema
Bloods
- FBCs, U&Es, CRP
Orifice Test
- Throacentesis
X-ray/Imaging
- CXR, CT Chest
Special Tests
- blood cultures
Management for empyema
Medical
- Thoracentesis/ Chest drain
- Antibiotics based on causative agent
Surgical
- removal of affected area
2 complications of empyema
Fibrosis
Empyema necessitatis
What is influenza
It is an acute respiratory illness due to infection with the influenza virus
What are the 3 serotypes of influenza
- Influenza A - more frequent and the cause of major influenza outbreaks
- Influenza B - tends to circulate with A in yearly outbreaks and causes less severe illness
- Influenza C - tends to cause a mild or asymptomatic illness akin to the common cold
Influenza A and B viruses cause most clinical disease
Risk factors for influenza
- Closed environments - e.g schools, prisons, and residential homes
- Very Young
- Elderly
- Immunocompromised
- Pre-existing cardiac or respiratory illness
Signs and symptoms of influenzas
- Malaise
- Anorexia
- Headache
- Fever
- Myalgia
- Non-productive cough
- Sore throat
Investigation for influenza
- Diagnosis is usually a clinical one.
Available tests include:
- Direct viral culture of nasopharyngeal swabs/aspirates
- PCR
Management for influenza
self-limiting
complication for influenzas
acute bronchitis
influenza related pneumonia
exacerbation of other conditions
what is mesothelioma
It is a cancerous tumour arising from the mesothelium including that of the pleura
What can mesothelioma caused by
Can be caused by asbestos exposure
does mesothelioma have long or short latency period
Long latency period
What is the life expectancy after diagnosis for mesothelioma
12-month life expectancy after diagnosis
What is metastatic tumour
Metastatic lung cancers are cancers that have spread to the lungs from a primary source
where can primary metastases spread to the lung s from
brain
bone
abdomen
prostate
adrenal
kidneys
Risk factors for metastatic tumour
Family history
exposure to industrial chemical agents
primary cancer
genetics
signs and symptoms of metastatic tumour
Chest pain
SOB
Haemoptysis
Weight loss
Recurrent infection
Night sweats
Cough
Investigations for metastatic tumour
FBC, ESR, CRP, LFT, RFT
CXR
PET scan
ECG
Management for metastatic tumour
based on individual case
Complications for metastatic tumour
Pleural effusion
Superior vena cava
What is pneumonia
Pneumonia is a common lower respiratory tract infection, characterised by inflammation of the lung tissue. It is almost always an acute infection, and almost always caused by bacteria
How to diagnose pneumonia
Cough and at least one other lower
respiratory tract symptom
AND
New focal chest signs on examination
AND
EITHER sweating, fevers, shivers, aches and
pains OR fever >38
AND
No other explanation for symptoms.
Risk factors for pneumonia
- Smoking
- Age: infants and the elderly
- Alcohol excess
- Preceding viral infections: for example: influenza
- Bronchial obstruction: COPD
- Bronchiectasis
- Immunosuppression: AIDS, chemotherapy
- Hospitalisation
- Underlying predisposing disease: Diabetes, CVD
Most common organism that causes pneumonia
strep pneumonia
common causes of pneumonia
staph aureus
mycoplasma pneumonia
haemophilus influenza
less common organisms that cause pneumonia
Klebsiella pneumonia
strep pyogenes
pseudomonas
aeruginosa
Coxiella burnetti
chlamydia psittaci
actinomyces israeli
examples of common organism that’s causes fungal pneumonia
Mucor spp/Aspergillus spp (mold), Candida spp/cryptococcus spp (Yeast), histoplasma spp/blastomyces spp/coccidioides spp (All dimorphic fungus)
Signs and symptoms of pneumonia
Acute illness characterised by cough, purulent sputum, fever.
Other common symptoms aches and pains, vomiting, anorexia, pleuritic chest
pain, dyspnoea.
Investigations for pneumonia
LFT
FBC
Blood and sputum culture
U&E
CRP (high)
Throat and nasal swab
CXR
Management for pneumonia
- Hydration
- Resting
- Use CURB-65 if in primary care to determine if the patient needs hospital care
- Oxygen
- Antibiotic
CURB 65
Confusion
Urea
RR->30 per minute
BP- sytolic of 90 or less or diatolic of 60 or lkess
65 years of age or older
0 - low risk
1-2 intermediate if 2 consider hospitalisation
3-5- high -> urgent admission
complication of pneumonia
pleural effusion
lung abscess
empyema
sepsis
What is atypical pneumonia
less common causative pathogen, not detectable on gram stain
organisms that cause atypical pneumonia
Mycoplasma. pneumoniae, Chlamydophila. pneumoniae and Legionella pneumophila
2 types of antibiotics that responds well to atypical pneumonia
macrolide or doxycycline
where and who is mycoplasma infection common in
barracks and institutions
children and young adults
what kind of symptoms do people with mycoplasma infection present with
dry cough
sore throat
flu like symptoms
complications of mycoplasma infection
myocarditis, meningo-encephalitis, maculopapular rash, haemolytic anaemia
Treatment for mycoplasma infection
erythromycin/ clarithromycin
tetracycline
Presentation of legionella pneumonia
Previously healthy patient
Contaminated air condition
Cough, chills, temp, myalgia
complications of legionella pneumonia
confusion
hepatitis
renal impairment
Hyponatraemia
lung abscess
empyema
hypotension
investigations for legionella pneumonia
CXR
blood culture
legionella serolgy
Management for legionella pneumonia
Erythromycin 14 -21 days of antibiotics, O2, IV abx/fluids
Rifampicin BD by mouth or IV in combination to all severely ill patients in whom diagnosis confirmed or thought to be likely
how is chlamydia pneumonia spread
droplet spread like coughing or sneezing
presentation of chlamydial pneumonia
Pharyngitis
hoarseness
otitis media
diagnosis of chlamydial pneumonia
PCR
Treatment for chlamydial pneumonia
first line- azithromycin
Tetracycline
macrolides
fluoroquinolones
common hospital acquired pneumonia organisms
Pseudomonas aeruginosa, Staphylococcal aureus and Enterobacteriaceae (especially Klebsiella, E. coli and Enterobacter spp.)
how is hospital acquired pneumonia different to community
acquired 48 hours after admission to hospital
Management or staph aureus pneumonia
Flucloxacillin
erythromycin
Klebsiella pneumonia presentation
High fever
rigors
pleuritic chest pain
purulent and gelatinous blood stained sputumn
what is klebsiella often associated with
alcoholism
diabetes,
copd
elderly
Management for klebsiella pneumonia
cefuroxime
pseudomonas pneumonia
common pathogen in bronchiectasis
How is pseudomonas pneumonia diagnosed
sputum culture
Treatment for pseudomonas pneumonia
antipseudomonal penicillin (e.g.,ticarcillin, piperacillin), ceftazadime, meropenem, ciprofloxacin
common organism in pneumonia in the immunosuppressed
Pneumocystis Jirovecii (carnii) pneumonia (PCP)
presentation of PCP
dry cough, exertional dyspnoea &desaturation, fever, bilateral crepitations.
Treatment for PCP
co-trimoxazole, pentamidine
What is pneumoconiosis
A group of lung diseases, also referred to as occupational lung diseases, including asbestosis, silicosis, coal workers pneumoconiosis and Berylliosis
Risk factors for Pneumonoconiosis
- Smoking
- Occupation related: working in environments that expose one to the mineral dusts
- Occupations include:
- Mining, construction or foundry work
- Underground coal mining
- High temperature ceramics
Signs and symptoms of pneumonoconiosis
- Shortness of breath
- Cough
- Chest tightness
- Wheezing
- Haemoptysis
- History of industrial work
- Widespread wheeze and crackles on auscultation
- Dullness on percussion
- Clubbing
- Cyanosis
- Barrel chest
what is pertussis
Highly contagious disease also known as “Whooping Cough”
when is the vaccine available for pertussis
Vaccine: for 16-31 weeks pregnant and in childhood schedule vaccinations.
Pathophysiology of pertussis
- Transmitted by sneeze or cough or through touching of contaminated surface
- Caused by Bordetella Pertussis (BP)
- BP then releases toxins to help anchor itself to the epithelium
- Toxins also paralyse the cilia, causing an excess of mucus build up
- Mucus build up triggers violent cough reflex
- Causes violent coughing spells called “paroxysms”
- Swollen airways cause whooping noise
- Significant cause of morbidity and mortality in infants younger than 2 years old
Risk factor for pertussis
- Vaccine wears off by teenage years so an outbreak can cause pertussis in teenage or adult years
- Infants less than a year old who unvaccinated or haven’t received all recommended vaccines have a high risk of complications and death
Signs and symptoms for pertussis
- Runny nose
- Nasal congestion
- Cough
- Low grade fever
Investigation for pertussis
FBC
CXR
Nasopharyngeal swab
Management for pertussis
Hospital admission for infants under 6 months of age and for any older child who has had apnoeic or cyanotic spells
Macrolides can reduce infective period -clarithromycin/azithromycin
Oxygen should be given if there is cyanosis.
What is pulmonary HTN
Progressive increase in pulmonary vascular resistance (PVR) and, ultimately, right ventricular failure and death.
Increase in mean pulmonary arterial pressure ≥25 mm Hg at rest as assessed by right heart catheterisation.
Risk factor for pulmonary HTN
- Family History of PAH
- Obesity
- Obstructive Sleep Apnea
- Female Gender
- Pregnancy
Symptoms of Pulmonary HTN
chest pain, exertional dyspnoea, fatigue, syncope.
Signs of pulmonary HTN
small volume pulse, peripheral cyanosis, a raised jugular venous pulse (JVP), a parasternal - right ventricular – heave, peripheral oedema
Investigations for pulmonary HTN
Right heart catheterisation is needed to confirm the diagnosis
ECG - right ventricular hypertrophy
Echocardiography - demonstrates a dilated right ventricle with impaired function
What are pulmonary nodules
Lung nodules are circular/rounded structures that appears on CXR/CT thorax and are traditionally defined as <3cm.
Risk factors for pulmonary nodules
- Infection
- Previous lung malignancy
- Immunocompromised
- Smoking
Signs and symptoms of pulmonary nodules
- Usually asymptomatic
- If symptomatic, symptoms would be consistent with underlying pathology such as weight loss/haemoptysis/SOB if malignant, fever/joint pain/SOB/haematuria if infectious/inflammatory cause.
what is pleural plaque
Pleural plaques arebenign areas of thickened tissue that form in the pleura, or lung lining
what is pleural plaque indicative off
asbestos exposure
Pleural plaques develop 10 to 30 years after initial asbestos exposure and usually do not require treatment.
What is pleurisy
Inflammation of the pleura which compromises lubrication and results in pain
What can cause pleurisy
- Pneumonia
- Trauma
- Cancers such as mesothelioma or lung Ca
- Rheumatoid arthritis
- Trauma
- Pulmonary embolism
- Viral respiratory illnesses
- Allergic reactions to drugs
- HIV
- Respiratory conditions such as Asbestos etc
Pathophysiology of pleurisy
- The lungs, rib cage and chest wall are lined with epithelium known as the Visceral pleura and the Parietal Pleura
- The Visceral pleura is known as the inner layer which lines the surface of the lungs
- The Parietal Pleura is known as the outer layer and lines the chest wall, rib cage and mediastinum
- Both layers are supplied by different nerves resulting in different pain sensations
- Parietal pleura is supplied by the Phrenic nerve resulting in sharp localised pain
- Visceral Pleura is supplied by the Autonomic nerve resulting in dull achy pain
- Between both layers there is fluid which acts as a lubricate allowing for inspiration and expiration
- When the pleura is inflamed (which can be caused by many illnesses); the pleural lining rubs together causing pain
3 risk factors for pleurisy
- Viral illness
- Malignancy
- Pneumothorax
Signs and symptoms of pleurisy
Finding can vary depending on cause
chest pain
exacerbated by deep inspiration
cough
SOB
Investigations for Pleurisy
These must be done to rule out other causes of Chest pain
Bloods
- Routine including Troponin and ABG (D-Dimer may be done if appropriate)
X-ray/Imaging
- to exclude cardiac cause
Special Tests
- CXR: These will rule out common differentials such as Pneumothorax, pleural effusions, etc
- A diagnosis of pleurisy/pleuritis can be done once other differentials have been confidently excluded
what is the management for Pleurisy
- This again is dependent on cause and patients PMH
- First line (if patient is otherwise stable) : NSAIDS
- Second line: Indomethacin
- REMEMBER TO TREAT UNDERLYING CAUSE IF APPROPRIATE (e.g. Abx if cause is a bacterial infection)
Complications of Pleurisy
- Adhesions of the pleura which can leave patients suffering with Chronic chest pain and SOB
- Pleural effusion
What is tension pneumothorax
Abnormal collection of air in the pleural space
The pleural cavity pressure is more than the atmospheric pressure
Pathophysiology of tension pneumothorax
- Tension pneumothorax occurs when a large amount of air is present within the lung causing the lung to deflate
- The pressure outside the lung is greater and can cause the trachea to deviate, eventually kinking the inferior vena cava which is what usually leads to death
- Often called a collapsed lung
Risk factors for tension pneumothorax
- Male
- Age
- Smoking
- Mechanical ventilation
- Previous pneumothorax
Signs and symptoms of tension pneumothorax
- Sudden chest pain
- Shortness of breath
- In severe cases – struggling to breathe
- PMH of Pneumothorax, Marfan’s Syndrome
- Cyanosis
- Tachycardia
- Absent breath sounds
- Hyperresonance on percussion
- Tracheal deviation in tension pneumothorax
Investigations for tension Pneumothorax
- BOXES (bloods, orifices, x ray/imaging, ECG, special tests)
X-ray/Imaging
- CXR: if not life threatening
- CT Scan: if not life threatening
Management for tension pneumothorax
Conservative
- If less than 2cm and asymptomatic
Medical
- Oxygen if SOB
Surgical
- Wide bore cannula, 2nd intercostal space, midclavicular line to decompress in tension pneumothorax
- Chest drain insertion
- Pleurodesis: for recurrent pneumothorax
Complications of tension pneumothorax
- Can occur repeatedly again
- May require surgery to prevent this
What is Traumatic pneumothorax
Abnormal collection of air within the pleural space
The pleural cavity pressure is = the atmospheric pressure
Pathophysiology of traumatic pneumothorax
- Traumatic pneumothorax occurs as a result of trauma
- Most commonly as a result of a stab wound with a knife
- Can also occur with blunt trauma
Risk factors for traumatic pneumothorax
- Male
- Age
- Smoking
- Mechanical ventilation
- Previous pneumothorax
Signs and symptoms of traumatic pneumothorax
- Sudden chest pain
- Shortness of breath
- In severe cases – struggling to breathe
- PMH of Pneumothorax, Marfan’s Syndrome
- Cyanosis
- Tachycardia
- Absent breath sounds
- Hyperresonance on percussion
- Tracheal deviation in tension pneumothorax
Investigations for traumatic pneumothorax
- CXR: if not life threatening
- CT Scan: if not life threatening
Management for traumatic pneumothorax
Conservative
- If less than 2cm and asymptomatic
Medical
- Oxygen if SOB
Surgical
- Needle aspiration: Wide bore cannula, 2nd intercostal space, midclavicular line to decompress in tension pneumothorax
- Chest drain insertion
- Pleurodesis: for recurrent pneumothorax
Complications for traumatic pneumothorax
- Can occur repeatedly again
- May require surgery to prevent this
What is primary pneumothorax
Abnormal collection of air within the pleural space
The pleural cavity pressure is less than atmospheric pressure
Pathophysiology of primary pneumothorax
Primary pneumothorax occurs without cause usually occurs in the absence of significant lung disease
Risk factors for primary pneumothorax
- Male
- Age
- Smoking
- Mechanical ventilation
- Previous pneumothorax
Signs and symptoms of primary pneumothorax
- Sudden chest pain
- Shortness of breath
- In severe cases – struggling to breathe
- PMH of Pneumothorax, Marfan’s Syndrome
- Cyanosis
- Tachycardia
- Absent breath sounds
- Hyperresonance on percussion
- Tracheal deviation in tension pneumothorax
Investigations for primary pneumothorax
BOXES (bloods, orifices, x ray/imaging, ECG, special tests)
X-ray/Imaging
- CXR: if not life threatening
- CT Scan: if not life threatening
Management for primary pneumothorax
Conservative
- If less than 2cm and asymptomatic
Medical
- Oxygen if SOB
Surgical
- Needle aspiration: Wide bore cannula, 2nd intercostal space, midclavicular line to decompress in tension pneumothorax
- Chest drain insertion
- Pleurodesis: for recurrent pneumothorax
Complications for primary pneumothorax
- Can occur repeatedly again
- May require surgery to prevent this
What is pleural effusion
Collection of abnormally present fluid in the pleural space
Pathophysiology of pleural effusion
- Occurs as a result of inflammation of the lungs or pleura
- This causes exudative effusion
- Systemic infections, heart failure, cirrhosis or malignancy can also cause an effusion
- This causes transudative effusion
Common primary aetiology of exudative effusion
Infection
cancer
autoimmune
drugs
pulmonary embolism
Common primary aetiology of transudative effusion
CHF
Liver disease
ESRD
Nephrotic syndrome
Pulmonary embolism
Common secondary aetiology of exudative effusion (right sided *2)
Meigs’ syndrome
Endometriosis
Common secondary aetiology of exudative effusion (Left sided *2)
Pancreatic
oesophageal rupture
Risk factors for pleural effusion
- Congestive heart failure
- Pneumonia
- Malignancy
- Recent CABG surgery
Signs and symptoms of pleural effusion
- Shortness of breath
- Cough
- Pleuritic chest pain
- PMH of cardiothoracic surgery, liver cirrhosis, malignancy, renal failure
- Decreased/absent breath sounds
- Dullness to percussion
- Decreased/absent tactile fremitus
Investigations for pleural effusion
Bloods
- WBC, U&E, CRP, Tumour markers
X-ray/Imaging
- CXR, CT Chest
Special Tests
- Blood cultures, Pleural fluid analysis (Light’s criteria)
Management for pleural effusion
Medical
- Therapeutic pleural drainage
Surgical
- Pleurodesis
Complications for pleural effusion
Pneumothorax
What is pulmonary fibrosis
Restrictive disease
Pulmonary fibrosis is a condition in which there is diffuse fibrosis of lung parenchyma with a resultant impairment of gas transfer and ventilation-perfusion mismatching.
Risk factors for pulmonary fibrosis
Family history
cigarette
smoking
advanced age
male sex
Signs and symptoms of pulmonary fibrosis
Dyspnoea
Cyanosis
Clubbing
Slightly reduced chest expansion
Bronchial breathing
On auscultation there may be late-inspiratory and pan-inspiratory crackles heard
over the affected lung
Investigations for pulmonary fibrosis
A combination of aforementioned clinical features and imaging/biopsy can suggest the diagnosis of pulmonary fibrosis.
- CXR – shows typical scarring pattern in the lungs, suggestive of the disease. Typical basilar, peripheral, bilateral, asymmetrical, reticular opacities
- CT scan of the lungs and/or a lung biopsy are usually needed to confirm diagnosis.
- CRP and ESR mildly elevated
Management for pulmonary fibrosis
Pulmonary rehabilitation
Corticosteroid therapy
Other immunosuppressive therapy - drugs such as cyclophosphamide and azathioprine have been used as a steroid sparing agent
Lung transplantation
Antifibrotic agents - pirfenidone is an immunosuppressant that is thought to have anti-inflammatory and antifibrotic effects.
Oxygen - to palliate symptoms of breathlessness
What is pulmonary embolism
Clot in the pulmonary artery/arteries impairs perfusion of the lungs and can lead to lung infarction and death
A pulmonary embolus is a fragment of thrombus (or clot) that breaks off and travels in the blood until it lodges in the pulmonary vasculature in the lungs.
Pathophysiology of PE
Endothelial damage, venous stasis and hypercoagulability lead to clot formation
Different causes of PE
Right ventricular thrombus
septic emboli
Fat, air or amniotic fluid embolism
Neoplastic cells
Parasites
Risk factors for PE
Any causes of immobility or hypercoagulability:
recent surgery
recent stroke or MI
disseminated malignancy
thrombophilia/antiphospholipid syndrome
prolonged bed rest
pregnancy, postpartum, COCP/HRT
Signs and symptoms of PE
Small emboli may be asymptomatic
large can be fatal
SOB
Chest pain
Haemoptysis
Syncope
fever
Cyanosis
Tachcardia
Raised jvp
Hypotension
What investigations are used for PE
WELLS score
PERC score
D-dimer
CXR
ECG
ABG
CT
V/Q scan
CTPA
Acronym for PERC score
HAD CLOTS
Hormone
Age >50
Dvt/pe history
Coughing blood
Leg swelling
O2 less than 95%
Tachycardia- 100+
Surgery/ Trauma
What is D-dimer and what is it used for
D-dimer is a breakdown product of cross-linked fibrin by the fibrinolytic system. D-dimer levels become elevated when there is lysis of cross-linked fibrin within the thrombus.
Used to rule out PE
When are D-dimer worthless
Recent surgery or trauma
Patient has other auto-immune or inflammatory process going on in the body
Liver / Renal / Heart Failure
Pregnancy
Sepsis
Sickle cell disease
Acute MI or Stroke
What is CXR used in PE investigation for
The greatest utility of the CXR in diagnosis of PE is exclusion of alternate disorders
Management for PE
Manage airway
Anticoagulation
DOACS: dabigatran, Rivaroxaban, Apixaban
Lowe molecular weight heparin
Warfarin orally
Complications for PE
Cardiac arrest
Pleural effusion
Pulmonary infarction
Death
What is RSV
Respiratory syncytial virus
Contagious viral infection of the respiratory tract, most often the cause of Bronchiolitis
How is RSV spread and what is the incubation period and where does the virus target
RSV is spread from person to person via respiratory droplet
2-8 days
The virus spreads to the respiratory tract targeting the apical ciliated epithelial cells
What are the risk factors for RSV
Chronic lung disease
Immune compromised
In utero exposure to Tabacco smoke
low socioeconomic disease
Premature birth
Signs and symptoms of RSV infection
Cold-like symptoms:
- Low-grade fever
- Cough
- Wheezing
- Rales
- Cyanosis
- PMH of premature birth, weakened immune system, heart or lung defects/disease
Investigation for RSV
- FBCs
- U&Es
Special Tests
- Rapid RSV antigen testing
Management for RSV
Conservative
- Observations
- Hydration
Medical
- Bronchodilators
- Alpha agonists
Complications for RSV
Bronchiolitis
Pneumonia
What is sleep apnoea
The interruption of sleep as a result of a narrowing of the throat
This leads to irregular breathing at night and excessive daytime sleepiness
Risk factors for sleep apnoea
Male sex
Obesity
Smoking
Hypothyroidism
Signs and symptoms for sleep apnoea
Excessive daytime sleepiness
Impaired concentration
Snoring
Unrefreshing sleep
Choking episodes during sleep
Witnessed apnoeas - a ten-second pause in breathing
Restless sleep
Investigations for sleep apnoea
Polysomnography - is the gold standard investigation.
Epworth Sleepiness scale.
Management for sleep apnoea
Lifestyle advice/Behavioural interventions – weight loss, smoking cessation,
reduction in alcohol consumption.
CPAP – it is the gold standard treatment.
Pharmacotherapy but its role is limited.
Surgery
What is sarcoidosis
It is a multisystem chronic inflammatory condition characterised by non-caseating epithelioid granulomata. Affects lungs, skin, lymph nodes and eyes most commonly. Accumulation of lymphocytes and macrophages and the formation of non-caseating granulomas
Signs and symptoms of sarcoidosis (constitutional, lung, skin, eye)
Constitutional symptoms – fever, night sweats, weight loss
Lung – dry cough, dyspnoea
Skin – erythema nodosum (tender, painful, bilateral)
Eye – anterior uveitis
Investigations of sarcoidosis
CXR – bilateral hilar
lymphadenopathy
CT
Blood tests
What is TB and how is it spread
Tuberculosis (TB) is an infection caused by Mycobacterium Tuberculosis and mainly affects the lungs
The bacteria is spread by inhaling respiratory droplets
Pathophysiology of TB
- The disease is airborne - infection occurs through the inhalation of droplets that may be present in the air if someone with TB has been coughing or sneezing
- TB is split into two categories: Latent and Active
- Latent TB - you have the TB bacteria present within your body, however it is in an inactive state and therefore asymptomatic and isn’t contagious. It can become active at a later stage, usually when the immune system is weaker e.g. neutropenia through chemotherapy, HIV etc
- Active TB - can occur either weeks after contracting the bacteria or several years later, now infective to others
- The lungs are the most common site for TB infection
- Extrapulmonary TB can manifest in other organs mainly the brain and spinal cord
Risk factor for TB
Close contact of TB patient
Homeless patients, those with alcohol dependency and other drug misusers
HIV-positive and other immunocompromised patients
Elderly patients
Lung symptoms for TB
cough, sputum, haemoptysis, breathlessness, lobar collapse, bronchopneumonia, hoarseness
Pleura symptoms for TB
breathlessness, pain, effusion
Heart symptoms for TB
pain, arrhythmias, cardiac failure, pericarditis
Intestine symptoms for TB
malabsorption, diarrhoea, obstruction
GU tract symptoms for TB
haematuria, renal failure, epididymitis, salpingitis, infertility
Skin symptoms for TB
erythema nodosum, lupus vulgaris
Eyes symptoms for TB
iritis, choroiditis, keratoconjunctivitis
Bones symptoms for TB
arthritis, osteomyelitis
Lymphatics symptoms for TB
lymphadenopathy, cold abscesses, sinuses
symptoms for TB
tuberculoma, meningitis
Investigation if active pulmonary TB is suspected
- If Active pulmonary TB is suspected:
-Chest X-Ray
-Sputum culture sample: for acid-fast bacilli smear, mycobacterial cultures and nucleic acid amplification testing (NAAT)
Investigation if active extrapulmonary TB is suspected
- If Active extrapulmonary TB is suspected:
-Chest X-ray and sputum sample should be requested
-Also, additional investigations depending on the likely site of infection
Investigation for latent TB
Tuberculin skin test (Mantoux test)
- Injecting 0.1mL of liquid containing tuberculin purified protein derivative (PPD) into top layers of forearm skin
- Check 48-72 hours after injection
- Positive if ≥5 mm skin induration
Offer Mantoux test to:
- Close contacts of person with active TB
- Immunocompromised adults
- Healthcare workers
- Immigrants from high incidence countries
Management for active TB
For people with active TB without central nervous system involvement, offer:
- Isoniazid (with pyridoxine), rifampicin, pyrazinamide and ethambutol for 2months
- Then isoniazid (with pyridoxine) and rifampicin for a further 4 months.
- Modify the treatment regimen according to drug susceptibility testing
Management for latent TB
- Isoniazid (with pyridoxine) and rifampicin x3 months
OR
- Isoniazid (with pyridoxine) x6 months
Complications for TB
Pleural effusion
Empyema
Pneumothorax
Laryngitis
Enteritis
Mycetoma with Aspergillus fumigatus in a healed cavity
Cor pulmonale secondary to extensive fibrosis
Death
What is extrinsic allergic alveolitis
Extrinsic allergic alveolitis is alung disorder resulting from repeated inhalation of organic dust
, usually in a specific occupational setting. In the acute form, respiratory symptoms and fever begin several hours after exposure to the dust.
What is asbestosis
A lung disease that develops due to inhalation of asbestos fibre,which is a fibrous hydrated magnesium silicate. Asbestos fibres are used for building roofs, insulation etc. Long time exposure to asbestos leads to shortness of breath by causing fibrosis of the lung.