Respiratory System/ENT Flashcards
What commonly causes bronchiolitis?
Respiratory syncytial virus
Why does bronchiolitis occur in infants?
It tends to occur in infants less than 18 months due to obstruction of the small airways - they have much smaller airways than older children/adults
What are the clinical features of bronchiolitis? (6)
- Coryza
- Wheeze
- Cough
- Difficulty feeding
- Apnoea
- Subcostal/intercostal retractions
In an infant with bronchiolitis, what would be found on examination? (2)
- Over-expansion of the chest
2. Wheeze and crepitations
How is bronchiolitis diagnosed, what investigations are carried out/results seen? (2)
- CXR will reveal overinflated lungs, and collapse or consolidation
- Nasopharyngeal aspirate - taken to look for RSV in respiratory secretions using immunofluorescence
How are babies with bronchiolitis managed? Do they need to be admitted?
Most babies are not ill enough to require admission and provided they can take feeds well, they are managed at home. Admission is required if there is:
- Cyanosis
- Increasing respiratory distress
- Apnoea
- Poor feeding
When do the symptoms of bronchiolitis peak during the infection?
Day 3-5
What are the NICE guidelines for diagnosis of bronchiolitis?
Diagnose if the baby has had a coryzal prodrome lasting 1 to 3 days, followed by:
- Persistent cough AND
- Either tachypnoea or chest recession AND
- Either wheeze or crackles on auscultation
When would a diagnosis of pneumonia be more likely compared to bronchiolitis? (2)
If the child has:
- A high fever (over 39 degrees) and/or
- Persistently focal crackles
NICE guidelines suggest there may be impending respiratory failure in a child with bronchiolitis, if they display what signs/symptoms? (3)
- Signs of exhaustion, for example listlessness or decreased respiratory effort
- Recurrent apnoea
- Failure to maintain adequate oxygen saturation despite oxygen supplementation.
According to NICE guidelines, which drugs often used to treat other respiratory conditions should NOT be given to treat bronchiolitis? (7)
- Antibiotics
- Salbutamol
- Hypertonic saline
- Adrenaline
- Montelukast
- Ipratropium bromide
- Systemic/inhaled corticosteroids
What is the treatment for bronchiolitis? (4)
- Oxygen (if stats are persistently below 92%)
- CPAP - only if have impending respiratory failure
- Upper airway suctioning - only if indicated (e.g. apnoea, feeding difficulties)
- If not taking fluids by mouth, give fluids via NG or OG tube
Before discharging a child with bronchiolitis, what is important for them to be able to do? (3)
- Maintain sats above 92% on room air for 4 hours, including a period of sleep
- Is taking adequate oral fluids
- Clinically stable
What are the NICE guideline red flag symptoms, that are important to look out for, and parents should be aware of, in children with bronchiolitis? (4)
- Worsening work of breathing (for example grunting, nasal flaring, marked chest recession)
- Fluid intake is 50–75% of normal or no wet nappy for 12 hours
- Apnoea or cyanosis
- Exhaustion (for example, not responding normally to social cues, wakes only with prolonged stimulation).
What is croup and why does it occur?
Croup is also known as laryngotracheobronchitis, and is a common childhood respiratory disease, characterised by a sudden onset of a seal-like barking cough often accompanied by stridor, voice hoarseness and respiratory distress.
The symptoms occur as it is an upper airway obstruction caused by inflammation due to a viral infection - normally parainfluenza virus.
What are the signs/symptoms of croup? (6)
- Seal-like barking cough
- Stridor
- Wheeze
- Coryza
- Fever
- Hoarseness
What % of children are affected by croup each year, and which age range is it most prevalent in?
3% of children each year, generally aged between 6 months and 3 years
When are hospital admissions of croup most common?
Between the months September to December
Croup tends to affect which gender more commonly?
Males
What is the treatment for moderate/severe croup?
Combination of dexamethasone and nebulised epinephrine
Which symptoms appear first in the croup?
Croup starts with coryza symptoms and fever and then proceeds to stridor and barking cough
If croup is very severe and respiratory failure develops, what is the management?
Intubation
What are the differential diagnoses for croup? (5)
- Epiglottitis
- Upper airway foreign body
- Retropharyngeal abscess
- Tonsillar abscess
- Allergic reaction
How is croup judged to be mild/moderate/severe/life-threatening?
Mild = seal-like barking cough but no stridor/intercostal recession Moderate = seal-like barking cough with stridor and sternal recession at rest ...but no agitation or lethargy Severe = all of the above with agitation and lethargy Life-threatening = all of the above with cyanosis/pallor/decreased level of consciousness
When is a child with croup admitted to hospital?
If it is moderate or worse
If in GP land, what is the management of a child with croup?
Give supplementary oxygen
Give oral dexamethasone (0.15mg/kg), if the child is too unwell to take this, then inhaled budesonide
Which bacteria causes epiglottitis?
Haemophilus influenzae B (HiB)
What are the common bacterial causes of pneumonia? (4)
- Streptococcus pneumoniae (especially in younger children)
- Mycoplasma pneumoniae
- Haemophilus influenzae
- Group B beta-haemolytic streptococcus (only in the newborn)
What are the viral causes of pneumonia? (5)
- Respiratory syncytial virus
- Influenza viruses
- Parainfluenza
- Adenovirus
- Coxsackie virus
What are the predisposing factors that can cause pneumonia in children? (6)
- Inhaled foreign body
- Persistent lobar collapse
- Aspiration
- Large left to right intracardiac shunt
- Immunocompromise
- Congenital abnormality of the tracheo-bronchial tree
What are the clinical features suggestive of pneumonia in the history? (5)
- Fever
- Cough
- Respiratory distress
- Shoulder tip/abdominal pain
- Sputum production in older children
What are the common presentation findings in a child with pneumonia?
- Tachypnoea
- Nasal flaring
- Intercostal/subcostal recession
- Grunting in infants
- Meningism
What investigations are performed in suspected pneumonia in children which can confirm the diagnosis? (2)
- CXR - focal consolidation suggests bacterial cause, diffuse consolidation often suggest viral
- Blood count/blood culture
What are the differential diagnoses for pneumonia in children? (6)
- URTI
- Bronchiolitis
- Acute bronchitis
- Asthma
- Non-specific viral infection
- Inhaled foreign body
What are the possible complications of pneumonia in children? (5)
- Lung abscess
- Empyema
- Pneumothorax
- Sepsis
- Bronchiectasis
What are the paediatric respiratory disorders that can cause a stridor? (3)
- Epiglottitis
- Inhaled foreign body
- Croup
What are the paediatric respiratory conditions that cause a wheeze? (5)
- Asthma
- Bronchiolitis
- Inhaled foreign body
- Cardiac failure
- Viral induced wheeze
What are the causes of a cough in infants? (4)
- Infections (URTI, bronchiolitis, pneumonia)
- Congenital malformations of the airway
- GORD
- Cystic fibrosis
What are the causes of a cough in pre-school children? (5)
- Infections (URTI, croup, acute bronchitis, pneumonia)
- Foreign body
- Asthma
- Cystic fibrosis
- Passive smoking
What are the causes of a cough in school children to adolescence? (6)
- Asthma
- Infections (URTI)
- Cigarette smoking
- Postnasal drip
- Psychogenic
- Cystic fibrosis
What are the symptoms of a chronic lower respiratory tract disease in children? (5)
- Productive cough which improves with antibiotics but quickly recurs
- Restriction of activity
- Failure to thrive/gain weight
- Clubbing
- Persistent tachypnoea
In a paediatric history for a cough, what questions are important to ask? (7)
- What does the cough sound like? (e.g. wheezy, dry, rattling due to mucus)
- What is the sputum like?
- When is the coughing worse?
- Is the cough acute, persistent or recurrent?
- Is the child systemically unwell?
- Associated symptoms/precipitating factors?
- Anyone in the family smoke?
Which respiratory condition frequently causes a nocturnal cough?
Asthma
When a child presents with stridor, what questions are important to ask?
- Any coryza or fever?
- Aspiration?
- Features of onset?
What is the most common cause of stridor, and which is the most worrying differential?
Most common cause is croup, which is self-limiting and therefore not too concerning, however the differential is epiglottitis which can be life-threatening
In what age range is epiglottitis most common to occur in?
Age 2 - 7
What % of children are affected by asthma?
20%
Why are the symptoms of asthma worse in infants?
Because their airways are so small, any narrowing or contribution of secretions/mucosal oedema has a bigger consequence and there is often a poor response to bronchodilators
How do children with asthma initially present?
Most children with asthma become symptomatic in infancy or school years. The diagnosis is made on a clinical basis of persistent or recurrent cough or wheeze, which is responsive to medication.
What is the step by step treatment of asthma in children under the age of 5? (4 steps)
Step 1. Prescribe an inhaled short-acting beta-agonist PRN (SABA)
Step 2. Add inhaled steroids 200-400 ug/day
Step 3. (if older than 6 months) Add leukotriene receptor antagonists
Step 4. Refer to respiratory paediatrician
What is the step by step treatment of asthma in children between the ages of 5-12 years? (5 steps)
Step 1. Prescribe a SABA prn
Step 2. Add inhaled corticosteroids 200-400ug/day
Step 3. Add LABA and consider leukotriene receptor antagonist or oral theophylline
Step 4. Increase dose of inhaled steroids 800ug/day
Step 5. Add oral low-dose prednisolone.
Refer to respiratory paediatrician
What type of rash does measles cause, and where does it start/spread? What are the other features associated with measles? (5)
Maculopapular - begins on the face and spreads downwards. Other features of measles include: 1. Koplik spots 2. Coryza 3. Cough 4. Conjunctivitis 5. Systemically unwell.
What type of rash does rubella cause? What are the other features of rubella?
Macular rash - tiny pink macules on the face and trunk, works downwards
Other features of rubella:
1. lymphadenopathy
2. Normally a well child
What type of rash does scarlet fever cause? and what are the other features of this infection? (3)
Maculopapular - fine punctuate red rash with sandpapery feel, followed by peeling of the hands/feet Other features of scarlet fever include: 1. Strawberry tongue 2. Perioral pallor 3. Tonsillitis
What type of rash occurs with Fifth disease, and how does it appear?
Maculopapular, ‘slapped cheek’ appearance, lace-like rash on the arms, trunk and thighs
Which virus causes Fifth disease?
Parvovirus B19
What type of rash does chicken pox cause?
Vesicular - papules, vesicles and crusts are present
What type of rash does meningococcaemia cause?
Purpuric - morbiliform (resembling measles), petechial or purpuric
What does petechiae refer to?
Red, brown or purple spots on the skin that are caused by bleeding beneath the skin
When a child presents with pyrexia of an unknown origin, what questions are important to ask in the history? (4)
- Review of systems
- Contact with infectious diseases
- Travel abroad?
- Exposure to animals?
How may a child with tonsillitis present? (4)
- Fever
- Sore throat
- Abdominal pain (due to mesenteric adenitis)
- Reduced fluid/food intake
What in the clinical examination would indicate a bacterial tonsillitis rather than a viral one?
A white exudate and tender enlarged cervical lymph glands
What is the usual treatment for children with tonsillitis which is most likely viral, and what about bacterial?
Gargles with saline and paracetamol - viral
The above and with antibiotics for bacterial - usually penicillin based
What are the complications of tonsillitis? (4)
- Otitis media
- Chronic tonsillitis
- Quinsy
- Post-streptococcal allergic disorders (acute glomerulonephritis)
What are the most common bacterial organisms that cause otitis media? (2)
- Streptococcus pneumoniae
2. Haemophilus influenzae
What ENT problem is commonly associated with otitis media?
Eustachian tube dysfunction
How does otitis media often present? (7)
- Fever
- Painful ear
- Hearing loss
- Often preceded by URTI
The following are often present in young children and are not obvious symptoms for otitis media, making it harder to identify the ear as the source of infection: - Anorexia
- Vomiting
- Diarrhoea
On examination of the ear, how does otitis media present?
Tympanic membrane is inflamed and bulging, with loss of the light reflex
Perforation of the tympanic membrane may occur - in which case pus will be present
What is the management of otitis media?
Most cases are caused by a virus, but if the child has had symptoms for more than 48 hours, then antibiotics will be prescribed - often amoxicillin
Which group of bacteria causes cervical adenitis?
Group A beta-haemolytic streptococcus
Which virus causes infectious mononucleosis (glandular fever)?
Epstein-Barr virus
What is the inheritance pattern for cystic fibrosis?
Autosomal recessive
Which protein receptor is affected in cystic fibrosis?
CFTR - CF transmembrane receptor
What is the result of the defect in the CFTR protein?
Ion transport in exocrine glands is defective - in the lung this means abnormal sodium and chloride ion transport leading to thickening of respiratory mucus
What happens in the lungs in someone with CF due to the thickening of respiratory mucus?
The lung is prone to inadequate mucociliary clearance, chronic bacterial colonisation and lung injury. Similar affects are had on other organs including pancreatic insufficiency, liver disease and male infertility.
Which is the most common mutation in the CFTR gene in cystic fibrosis? (even though there are over 1000 mutations)
F508 deletion
How is cystic fibrosis (CF) screened for and diagnosed in the UK?
Using the Guthrie card - CF can be identified by newborn screening for abnormally raised immunoreactive trypsinogen (IRT) and CFTR F508 deletion from blood-spot analysis
What in a history/presenting complaint can indicate CF?
- Cough and wheeze
- Shortness of breath
- Sputum production
- Haemoptysis
- Weight loss
- Steatorrhoea
Approximately 20% of CF patients present in the neonatal period with what?
Meconium ileus (an obstruction of the bowel caused by thick, abnormal meconium)
Other than meconium ileus, how else can children present with CF?
- Malabsorption
- Faltering growth
- Recurrent chest infection
What investigations are carried out in someone with suspected CF and what do they show?
- Sweat test showing increased chloride levels (>60mmol/L)
- Chest X-ray: hyperinflation, increased antero-posterior diameter, bronchial dilatation, cysts, linear shadows and infiltrates
- Lung function: obstructive pattern with decreased FVC and increased lung volumes
What are the problems/complications that arise due to CF in the neonatal period? (2)
- Meconium ileus
2. Jaundice
What are the complications that arise due to CF in early childhood? (4)
- Bronchiectasis
- Rectal prolapse
- Nasal polyps
- Sinusitis
What are the complications that arise due to CF in adolescence? (8)
- Diabetes
- Cirrhosis and portal hypertension
- Distal intestinal obstruction
- Pneumothorax
- Haemoptysis
- Aspergillosis
- Male sterility
- Psychological problems
What physiotherapy is given to children with CF and how often is it performed?
Pulmonary physiotherapy - twice daily
- Chest percussion
- Postural drainage
- Self-percussion
- Deep breathing exercises
What prophylactic treatment are they given to prevent respiratory infections?
Oral antibiotics - protect against staph. aureus and haemophilus influenzae
What will many children have with CF if they have recurrent chest infections?
An indwelling/permanent form of IV access to give antibiotics e.g. indwelling Portacath
What are medications are given to help children with CF in addition to antibiotics? (3)
- Annual influenzae/pneumoccocal vaccination
- Bronchodilators
- Mucolytics - nebulized acetylcystine
What treatment is given/recommended in terms of nutrition and help with this for children with CF? (4)
- Pancreatic insufficiency is treated with oral enteric-coated pancreatic supplements + ranitidine
- High calorie diet (require 150% more than normal)
- Salt supplements
- Fat-soluble vitamin supplements - Dalivit drops 1mL/day, vitamin E, vitamin K
What are the differences between croup and epiglottitis?
Croup = days, prodromal coryza, barking cough, can drink, hoarse voice, rasping stridor Epiglottitis = hours onset, no prodromal symptoms, slight cough if any, drooling saliva, cannot feed, weak or silent voice
In CF, the defective protein causes which ion transport channel to be affected?
Sodium and chloride transport across the membrane of secretory epithelial cells
What is the sweat test looking for when diagnosing CF?
High levels of sodium and chloride concentration
What are the stools like of someone with CF?
Fatty/greasy - due to malabsorption caused by pancreatic insufficiency
What are the muco-active agents used to help treat CF?
- rhDNase
- hypertonic sodium chloride nebs
- Mannitol dry powder for inhalation if intolerant to rhDNase and HSC nebs
What treatment can you give for chronic pseudomonas aeruginosa infection in CF?
C nebs (powerpoint from Umamah)
What treatment improves bile flow in someone with CF?
Ursodeoxycholic acid treatment
What % of adolescents with CF will develop diabetes?
19% - will require insulin therapy
What length of time is stopping breathing is classed as apnoea?
20 seconds (though more than 10 is worrying)
What is RSV palivizumab?
It is a prophylactic injection to prevent RSV bronchiolitis. It needs to be given monthly through the winter months and is given to premature babies going home on oxygen, or other high risk babies.
Which age is the peak incidence for the croup?
2 years
Whats the Westley Croup score?
Mild, moderate and severe classifications of croup based upon level of consciousness, cyanosis, stridor, air entry and intercostal recession - useful for monitoring improvement and indicating which treatment to use
What investigations are going to be performed for croup?
Check oxygen sats and auscultation as do not want to cause any distress to the child due to risk of airway obstruction
What is epiglottitis?
Oedema/inflammation of the epiglottis and surrounding area, typically occurs at 2 - 5 years of age
How is the stridor different between epiglottitis and croup?
In croup the stridor is harsh whereas with epiglottis the stridor is soft (also they will appear very unwell, drooling, lethargic)
What is the first line investigation for epiglottitis?
Fibre-optic laryngoscopy
What are the causes of epiglottitis?
- Hib
- Staph. aureus
- Strep.