Respiratory Flashcards
Give 3 signs of respiratory distress in a child.
- Tachypnoea, RR 40-60.
- Subcostal and intercostal recession.
- Stridor.
- Tracheal tug.
- Cyanosis
What virus can cause croup?
Parainfluenza virus
Describe the epidemiology of croup.
Peak incidence at 6 months - 3 years
More common in autumn
What is croup?
Acute laryngotracheobronchitis - trachea, bronchi and larynx are all affected.
What are 4 features of croup?
stridor
barking cough (worse at night)
fever
coryzal symptoms
Clinical Knowledge Summaries (CKS) suggest using the following criteria to grade the severity of croup.
Mild:
Occasional barking cough
No audible stridor at rest
No or mild suprasternal and/or intercostal recession
The child is happy and is prepared to eat, drink, and play
Moderate:
Frequent barking cough
Easily audible stridor at rest
Suprasternal and sternal wall retraction at rest
No or little distress or agitation
The child can be placated and is interested in its surroundings
Severe:
Frequent barking cough
Prominent inspiratory (and occasionally, expiratory) stridor at rest
Marked sternal wall retractions
Significant distress and agitation, or lethargy or restlessness (a sign of hypoxaemia)
Tachycardia occurs with more severe obstructive symptoms and hypoxaemia
What are the criteria to admit a child with croup?
CKS suggest admitting any child with moderate or severe croup. Other features which should prompt admission include:
< 6 months of age
Known upper airway abnormalities
Uncertainty about diagnosis
What is the mx of croup?
A single dose of oral dexamethasone (0.15mg/kg)
Prednisolone is an alternative
What is the emergency tx of croup?
High-flow oxygen
Nebulised adrenaline
Give 3 signs of bronchiolitis.
Coryzal symptoms precede:
- dry cough
- increasing breathlessness
- wheezing, fine inspiratory crackles (not always present)
- feeding difficulties associated with increasing dyspnoea are often the reason for hospital admission
What viruses can cause bronchiolitis?
RSV = main causative organism!
Also: rhinovirus, influenza, adenovirus, parainfluenza virus.
Describe the epidemiology of bronchiolitis.
< 1yr olds (90% are 1-9 months, with a peak incidence of 3-6 months).
Maternal IgG provides protection to newborns against RSV
Higher incidence in winter
Give 5 bacterial organisms that commonly cause pneumonia in children.
- Group B strep in neonates.
- S.pneumoniae.
- H.influenzae.
- K.pneumoniae.
- M.pnuemoniae.
Give 5 signs of pneumonia in children.
- Fever.
- Difficulty in breathing
- Increased respiratory rate (best clinical sign)
- Cough.
- Poor feeding.
- Lethargy.
- Localised chest, abdominal and neck pain (feature of pleural irritation and suggests bacterial infection)
What investigations might you do in a child who you suspect has pneumonia?
- CXR -> look for consolidation.
- Blood cultures.
It is often difficult to get a sputum sample.
Describe the treatment for a child with pneumonia.
- 1st line- Amoxicillin
- Macrolides eg Erythromycin may be added if there is no response to first line therapy
- Macrolides should be used if mycoplasma or chlamydia is suspected
- Pneumonia associated with influenza- Co-amoxiclav
What is the difference between wheeze and stridor?
Wheeze: polyphonic noise heard on expiration.
Stridor: monophonic high pitched noise heard on inspiration.
Describe the aetiology of recurrent wheeze.
- Persistent infantile wheeze.
- Viral episodic wheeze.
- Asthma.