Paeds ughhh Flashcards
What is Bronchiolitis and what is its epidemiology?
Inflammation and infection of the bronchioles caused by RSV.
Commonest serious respiratory infection in infancy
Rare after the age of 1 y/o
RSV is the cause in 80% of cases
What examination signs might you find in a brochiolitic baby?
O/E hyperinflated lungs with a prominent sternum and downwardly displaced Liver, fine-inspiratory crackles, high-pitched wheeze heard louder on expiration and subcostal recession
What is the presentation of Bronchiolitis?
- Coryzal sx (runny nose, sneezing etc)
*SIGNS OF RESPIRATORY DISTRESS (LEARN THESE)
*Dyspnoea
*Tachypnoea
*Poor feeding
*mild fever
*Wheeze + crackles on ausc
*Sometimes apnoea episodes(child stops breathing)
What are the signs of respiratory distress? (most imp thing!!!!!!!!!!!)
*Raised respiratory rate
*Use of accessory muscles of breathing, such as the sternocleidomastoid, abdominal and intercostal muscles
*Intercostal and subcostal recessions
*Nasal flaring
*Head bobbing
*Tracheal tugging
*Cyanosis (due to low oxygen saturation)
*Abnormal airway noises
Why might you need to admit a broncho baby?
Aged under 3 months or any pre-existing condition such as prematurity, Downs syndrome or cystic fibrosis
50 – 75% or less of their normal intake of milk
Clinical dehydration
Respiratory rate above 70
Oxygen saturations below 92%
Moderate to severe respiratory distress, such as deep recessions or head bobbing
Apnoeas
Parents not confident in their ability to manage at home or difficulty accessing medical help from home
What is the Mx of bronchiolitis?
Supportive e.g. Humidified O2 via nasal cannulae, Fluids if needed, nasal suction
Assisted ventilation e.g. nasal cannulae or CPAP may be needed
Most infants recover within 2 weeks, some have a recurrent cough and wheeze
To reduce the risk in pre-term infants, Palivizumab is given monthly IM
*Adequete food intake via NG, orally or IV
What can you give to at risk babies to prevent bronchiolitis?
To reduce the risk in pre-term infants, Palivizumab is given monthly IM.
*Palivizumab is a monoclonal antibody that targets the respiratory syncytial virus. A monthly injection is given as prevention against bronchiolitis caused by RSV. It is given to high risk babies, such as ex-premature and those with congenital heart disease.
It is not a true vaccine as it does not stimulate the infant’s immune system. It provides passive protection by circulating the body until the virus is encountered, as which point it works as an antibody against the virus, activating the immune system to fight the virus.
What are the paeds causes of Bacterial Pneumonia in different age groups?
Streptococcus pneumonia is most common
Group A strep (e.g. Streptococcus pyogenes)
*Group B strep occurs in pre-vaccinated infants, often contracted during birth as it often colonises the vagina.
Staphylococcus aureus.
H.influenzae - prevaccinated or unvaccinated children
Mycoplasma pneumonia, an atypical bacteria
Viral causes of paeds pneumonia?
Respiratory syncytial virus (RSV) is the most common viral cause
Parainfluenza virus
Influenza virus
Ix for bacterial pneumonia?
*A chest xray is the investigation of choice for diagnosing pneumonia. It is not routinely required.
* Sputum cultures + throat swabs and viral PCR to establish organism and guide tx
*Ptx with sepsis -> Blood cultures.
Mx of paeds pneumonia?
Newborns- co-amoxiclav
<5yo- amoxicillin + co-amox
>5yo- amox or erythromycin
Amoxicillin is often used first line. Adding a macrolide (erythromycin, clarithromycin or azithromycin) will cover atypical pneumonia. Macrolides can be used as monotherapy in patients with a penicillin allergy.
Presentation of pneumonia in children?
Px with fever, respiratory distress, poor feeding, lethargy
Chest, abdo or neck pain indicates pleural irritation and a bacterial cause
Biggest clinical sign of Pneumonia is increased RR
*Bronchial breath sounds. These are harsh breath sounds that are equally loud on inspiration and expiration. These are caused by consolidation of the lung tissue around the airway.
*Focal coarse crackles caused by air passing through sputum similar to using a straw to blow into a drink.
*Dullness to percussion due to lung tissue collapse and/or consolidation.
What do you know briefly about the main things - Bronchectasis?
Permanent dilatation of the bronchi globally or restricted to 1 lobe (focal)
Px with recurrent chest infections, productive cough (in adults there’s lots of sputum
production, children swallow it so not seen as much), haemoptysis
Best investigation = High-res CT chest
What is the characteristic imaging sign in bronchiectassis?
Signet ring sign - when looking at the bronchus and pulmonary artery, the bronchus > artery whereas they should be the same size or vessel > bronchus.
Can also get tram lines or honeycombing of dlated thickened bronchial walls
What are the causes of bronchiectasis?
*CF
*Primary ciliary dyskinesia
*immunodeficiency: HIV, malignancy etc
*Chronic aspiration
*TB
*Foreign body (if focal and only one sided)
What is Primary ciliary dyskinesia?
Primary ciliary dyskinesia (PCD) is also known as Kartagner’s syndrome. It is an autosomal recessive condition affecting the cilia of various cells in the body. It is more common in populations where there is consanguinity.
PCD causes dysfunction of the motile cilia around the body, most notably in the respiratory tract. This leads to a buildup of mucus in the lungs, providing a great site for infection that is not easily cleared.
It also affects the cilia in the fallopian tubes of women and the tails (flagella) of the sperm in men, leading to reduced or absent fertility.
What is Kartagners triad?
Kartagner’s triad describes the three key features of PCD. Not all patients will have all three features. These are:
Paranasal sinusitis
Bronchiectasis
Situs Inversus - where all the internal (visceral) organs are mirrored inside the body. Therefore the heart is on the right, the stomach is on the right and the liver is on the left. Dextrocardia is when only the heart is reversed.
What is the tx and mx of primary ciliary dyskinesia?
Mx with daily physiotherapy to clear secretions, prompt tx of infections with abx and ENT
follow-up
Examination findings of CF?
O/E persistent loose cough with purulent sputum, hyperinflation of the chest, coarse
crepitations and/or inspiratory wheeze. With established disease there’s clubbing
CF investigations?
Sweat test - there’s abnormally high levels of Cl (60-125 mmol/L in comparison with 10-40 mmol/L in normal children)
Testing faecal elastase - if it’s low = pancreatic insufficiency
Testing for gene abnormalities
*Heel Prick test, days 5-9 in new borns
Pathophysio of CF?
*Thick pancreatic and biliary secretions that cause blockage of the ducts, resulting in a lack of digestive enzymes such as pancreatic lipase in the digestive tract
*Low volume thick airway secretions that reduce airway clearance, resulting in bacterial colonisation and susceptibility to airway infections
*Congenital bilateral absence of the vas deferens in males. Patients generally have healthy sperm, but the sperm have no way of getting from the testes to the ejaculate, resulting in male infertility