1. acute resp dzs

1. Shazlin bt Sabanya @ Sabaah 3. Noraini bt. Tukiran2. Siti Aisyah bt. Ramli 4. Faizah bt. Abdul Rauf

PRESENTED BY

a) PNEUMONIA

WHO Definition : Pneumonia is a form of acute respiratory

tract infection that affects the lungs.

The lungs are made up of alveoli, which fill with air when a healthy person breathes.

In pneumonia, the alveoli are filled with pus and fluid, which makes breathing painful and limits oxygen intake.

- Epidemiology

Pneumonia is the leading cause of death in children worldwide.

Pneumonia kills an estimated 1.6 million children every year – (accounting for 18% of all deaths of children <5 y/o worldwide) more than AIDS, malaria and tuberculosis combined.

Most prevalent in South Asia and sub-Saharan Africa.

-Etiology

Bacterial :

Viral : RSV is the most common Fungal : Infants infected with

HIV, Pneumocystis jiroveci is

the most common.

- Risk factors

Higher incidence in children whose immune systems are compromised

Can be due to certain disease such as HIV and measles or even in malnutrition or undernourishment, especially in infants who are not exclusively breastfed.

Following environmental factors also increase a child's susceptibility to pneumonia: indoor air pollution caused by cooking and heating

with biomass fuels (such as wood or dung) living in crowded homes parental smoking.

- Clinical manifestations

May be absent in infant

- Investigations

Blood investigations FBC-particularly in WBC for evidence of

infections. In bacterial pneumonia WBC elevated(>20 000/mm3)- neutrophils, in viral pneumonia WBC count is normal mildly elevated (lymphocytes)

Blood C&S- for precise etiology detection especially in severe pneumonia and poor respond twds 1st line antibiotics

Cont..

Chest radiograph

Pleural fluid analysis If there is significant pleural effusion, pleural

tap is helpful Serology test

If atypical pneumonia is suspected.

Normal Lung Lobar pneumonia Bronchopneumonia

- Complications

Cx are > frequent in bacterial than viral pneumonia

These includes : Respiratory failure Sepsis and septic shock Pleural effusion, empyema, and abscess

- Treatments

It is difficult to diff. Between viral/bacterial pneumonia

Tx consist of both supportive and pharmacological measurements : Supportive : Fluids, O2 , temperature

control, chest physioteraphy Pharmachological

Mild : Oral antibiotics / oral erythromycin for atypical pneumonia

Severe : i/v antibiotics

- Preventions

Immunization against Hib, pneumococcus, measles and whooping cough (pertussis) is the most effective way to prevent pneumonia.

Adequate nutrition to improving children's natural defences, starting

with exclusive breastfeeding for the first six months of life, also helps to reduce the length of the illness if a child does become ill.

Encouraging good hygiene in crowded homes

Children infected with HIV, the antibiotic cotrimoxazole is given daily to decrease the risk of contracting pneumonia.

b) COMMON COLD

Definition : a.k.a acute viral rhinopharyngitis/acute

rhinitis /rhinosinusitis Is a viral infectious disease of the URT,

caused primarily by rhinoviruses and less common by coronaviruses.

Most frequent infectious disease in humans with on average 2-4 infections a year in adults and up to 6–12 in children

- Pathogenesis

Inhalation of virus-laden aerosol generated when an infected person coughs or

sneezes/by touching a contaminated surface and then touching the nose or eyes

Viral infection of nasal epithelium

Acute inflammatory response

Development of symptoms

Clinical manifestations

Typically develop 1-3 days after viral infections

These include: Nasal congestion Rhinorrhea Sore throat Occasionally, non-productive cough Cold usually persist for 1 week Examination of nasal mucosa may reveal

swollen and erythematous nasal turbinates

Complications

Otitis media rhinovirus infection, commonly

predisposes children to ear infections, possibly by obstructing the Eustachian tube.

Sinusitis Lower respiratory tract infection

E.g: bronchitis and pneumonia Aggravation of asthma

Preventions & treatments

Currently no medications which have been demonstrated to shorten the duration of illness. Treatment comprises symptomatic support usually via analgesics for fever, headache, sore muscles, and sore throat.

Preventions include: Avoid close contact with people who are

infected Regular hand washing Face mask usage

c) PHARYNGITIS

Def : Inflammation of pharynx. (sore throat)

Etiology : GAS (most common) Adenoviruses Enteroviruses Rhinoviruses

Streptococcal pharyngitis uncommon before 2-3 y/o but incidence increase in school age children

Clinical manifestation

Raw, red, and swollen throat. Lymph node enlargement Fever, headache, or earache. Cough and runny nose. Problems talking, breathing, swallowing,

and sleeping. Tender, swollen areas on the sides of

child's neck. Whitish-yellow patches or blisters in the

back of throat or on tonsils.

Investigations

Aim: to distinguish between pharyngitis caused by group A strep. from nonstreptococcal (usually viral) organism.

Throat culture is the diagnostic ‘gold standard’ for establishing the presence of streptococcal pharyngitis.

Many rapid diagnostic technique for streptococcal pharyngitis are available, with specificity up to 99%. However, the sensitivity are varies.

Complications

Cx of strep. pharyngitis : parapharyngeal abscess acute rheumatic fever acute postinfectious glumerulonephritis.

Viral pharyngitis may predispose to bacterial middle ear infections

Treatments

Self-limiting, but rapid recovery by antimicrobial therapy (12-24 hrs earlier).

Viral pharyngitis : self-limiting + symptomatic treatment.

Bacterial : antibiotic penicillin / erytromycin

TONSILLITISOTITIS MEDIABRONCHIOLITIS

By: Siti Aisyah Bt Ramli

TONSILLITIS

•Definition- infalammation of tonsil caused by viral or bacterial infection

•Aetiology- group A ß-hemolytic streptococci

and Epstein Barr virus

Clinical manifestations

•Red and swollen tonsils•White or yellow patches on tonsils•Dysphagia •Headache•Sore throat•Fever •Abdominal pain•Tonsillar exudate•Cervical lymphadenopathy

Enlarged, red tonsils with and exudative white patches

Treatments

•Pain relief- acetaminophen or ibuprofen•Antibiotics- penicillin/erythromycin•Amoxicillin avoided because it can cause

widespread maculopapular rash if it is due to infectious mononucleosis

•Chronic-tonsillectomy

OTITIS MEDIA

• Definition-infection of the middle ear, between tympanic membrane and the inner ear including eustachian tubes

• Epidemiology:- common at age of 6 months until 12 months-infant and young children are prone to get otitis

media because Eustachian tubes are short, horizontal and functioning poorly

• Aetiology: Virus- RSV, rhonivorus Bacteria- Streptococcus pneumoniae,

pneumococcus, Haemophilus influenza, Moraxella catarrhalis

Clinical manifestations

•Pain in ear•Fever•Cold or sore throat

Signs

•Tympanic membrane-bright red and bulging with loss of normal light reflection

•Acute perforation of ear drum with pus visible in external canal

Complications • Mastoiditis-rare• Meningitis-rare• Recurrent ear infections can lead to otitis media

with effusion.Eardrum is seen to be dull and retracted often with a fluid level visibleCommon in children with peak incidence of 1 year and resolves spontaneously.Antibiotic improve the appearance of tympanic membrane in short term. The most common cause of conductive hearing

loss in children and interfere normal speech and learning.

Treatments

•Pain- treated by paracetamol or ibuprofen•Antibiotics- amoxicillin•Mostly can resolve spontaneously

BRONCHIOLITIS• Definition- inflammation of bronchioles that

leads to the lungs. As these airways become inflammed, they swell and fill with mucus, making difficult to breathing.

• Epidemiology-common in children less than 24 months-peak between 1-6 months of age.

• Aetiology-Respiratory Syncytial Virus is the commonest cause in Malaysia

Clinical Manifestation-•Children <2years old•Mild coryza•Low grade fever•Dry cough and wheeze•Tachypnea, chest wall recession•Breathlessness•Hyperinflation of the chest•Fine crepitation, rhonci•Rattly chest•In neonates-apnea

Risk factors•History of premature•Age less than 6 months•Chronic lung disease•Congenital heart disease•Underlying immunodeficiency

Investigations•Chest X-rayHyperinflated chest with bronchial

thickeningFlattened diaphragmArea of atelectasisUpper lobe consolidation due to mucousplugging

Managements •Majority- self limiting•1% will be hospitalized Criteria:Age less than 1weekCyanosis and apneaChest recessionPoor feedingOxygen saturation <93%High risk category

Treatments

• Vital physiological monitor-heart rate, respiratory rate, oxygen saturation, level of consciousness

• If poor feeding -feed in a small amount but frequent to prevent dehydration

• Suction of nasopharynx –to maintain clear airway• If severe resp distress, cyanosis and apnea-kept

nil by mouth and IV• Specific treatments:-oxygen therapy -nabulizes bronchiodilator-corticosteroid-ribavirin(anti-viral agent) not in Malaysia-montelukast-leukotriane agonist

Preventions

•Hand washing•Avoid exposed to cigarette smoke •Passive immunisation-Palivizumab®

monoclonal antibody-IM

By: Faizah Binti Abdul Rauf

It is characterized by episodic, reversible bronchospasm resulting from an exaggerated bronchoconstrictor response to various stimuli.

Characterized by: Airway inflammationAirflow obstructionAirway hyperresponsiveness

Most common chronic resp. disorder in children 10-15% of schoolchildren

In childhood, asthma is twice as common in males as in females

10-20% of all acute medical admissions to paeds wards in children aged 1-16 years.

What makes a child more likely to develop asthma? risk factors such as presence of allergies,

family history of asthma and/or allergies, frequent respiratory infections and low birth weight

children are being exposed to more and more allergens such as dust, air pollution, and second-hand smoke. Children are not exposed to enough childhood illnesses to build up their immune system body fails to make enough protective antibodies.

decreasing rates of breastfeeding have prevented important substances of the immune system from being passed on to babies.

Extrinsic and intrinsic Extrinsic: atopic, occupational, and allergic

bronchopulmonary aspergillosis. Intrinsic: triggering mechanisms are nonimmune

(eg: aspirin, pulm. inf, cold, stress and exercise) Acute and chronic

When external triggers are present, sufferers experience acute attacks of symptoms. Asthma attacks can last anywhere from a few minutes to over 24 hours.

Some individuals will have stable asthma for weeks or months and then suddenly develop an episode of acute asthma (exacerbation).

Chronic asthma is most often an inherited disorder that tends to clear up in late childhood or adolescence, though many people have lifelong symptoms.

Can be genetic or enviromental (triggers)

Enviromental: tobacco smoke, air pollution, viral or bacterial resp. infection, psychological stress, cold air, exercise, some medications (aspirin), dust and pets.

In young pre-school children and older children, viruses are the commonest cause of wheezing– Some people call this 'viral-induced wheeze' or 'wheezy bronchitis', whilst others call it asthma.

To acquire asthma- have been born with a predisposition to the disease. It may not reveal itself until they have been exposed to some asthma irritants.

Triggering factors bronchial inflammation bronchial hyperreactivity edema + bronchoconstriction + ↑ mucus production airways narrowing symptoms: cough, wheeze, SOB, chest tightness

Patient’s history of symptoms- should elicit frequency, severity and factors that may worsen the child’s symptom- nightime symptoms are common

Supported by personal or family history of atopic disease. (but absence of them does not exclude the diagnosis)

Physical examinationUsually normal during attacks.during acute episodes it will may reveal

tachypnea, tachycardia, cough, wheezing and a prolonged expiratory phase

As the attack progresses, cyanosis, diminished air movement (chest tightness), retractions, agitation, inability to speak, tripod sitting position, diaphoresis, and pulsus paradoxus ( decrease in blood pressure with inspiration of > 15mm Hg) may be observed.

Assess the severity:

It can be difficult to assess the severity of an acute asthma- wheeze and RR are poor indicators- contraction of the SCM, chest recession and pulse rate are better guides.- pulsus paradoxus indicates significant airways obstruction in children but it is difficult to measure accurately.- If breathlessness interferes with talking, the attack is severe.- Cyanosis is a late sign, indicating life-threatening asthma.

Arterial oxygen saturation should be measured with a pulse oximeter in all children presenting to hosp with acute asthma

Measurement PEF should be routine in school-age children.

Features of severe and life-threatening severe

1) Too breathless to talk or feed2) Respirations > 50/min3) Pulse > 140/min4) Peak flow < 50% predicted or best

valuelife threatening

1) Peak flow <33% predicted or best value2) Fatigue, agitation, drowsiness3) Cyanosis, silent chest or poor resp.

effort

Criteria for hospital admission:

If after high-dose inhaled bronchodilator therapy, they: Have not responded adequately clinically Are exhausted Still have marked reduction in their predicted

peak flow rate Have a reduced oxygen saturation (<92% in air)

CXR is indicated only if there is severe dyspnea or unusual features (eg. Asymmetry of chest signs suggesting pneumothorax, lobar collapse) or signs of severe infection.

In children, arterial blood gases are only indicated in life-threatening or refractory cases.

High-dose inhaled bronchodilators, steroids, and oxygen form the foundation therapy of severe acute asthma.

As soon as dx has been made give B2 bronchodilator.

For severe exacerbations, high dose ‘burst’ therapy should be given 3 doses given back-to-back.

Addition of nebulised ipratropium to the initial therapy in severe asthma has been shown to be beneficial.

Oxygen is given when there is any evidence of arterial oxygen desaturation.

A short course ( 2-5 days) of oral prednisolone expedites recovery from severe acute asthma.

For children who fail to respond adequately to inhaled bronchodilator IV therapy (IV amynophilline, IV salbutamol

Antibiotics if there is bact. Infection After an acute exacerbation, child’s

maintenance treatment and inhaler technique should be reviewed.

Summary of the treatment of acute asthma or life-threatening asthma:Immediate treatment

Oxygen via a face mask Salbutamol (5mg) or terbutaline via oxygen

driven nebuliser (half dose if <5years)- three back-to-back nebuliser.

Ipratropium nebulised Oral prednisolone (1-2 mg/kg, max dose 40 mg)

Life-threatening features IV aminophylline or salbutamol IV hydrocortisone

Subsequent managementOxygen if SaO2 <94%Repeat B2 agonist 1-4 hourlyMonitor peak flow and oxygen saturation.

By: Noraini Binti Tukiran

CROUP- definition

Acute partial obstruction of the upper respiratory airway, usually in young children

-Dorlan’s pocket medical dictionary

Condition that causes an inflammation of the upper respiratory airways — the voice box (larynx), windpipe (trachea) & bronchi.

Also known as laryngotracheobronchitis -

http://kidshealth.org

Epidemiology

Most common in children 6 months to 3 years old but can also effect older kids

Male-to-female ratio is approximately 1.4:1.

Episodes typically follow a common cold

Symptomatic re-infection is common, usually mild

Peak in cold weather

Etiology

Parainfluenza viruses (types 1,2,3)- commonest cause

Other: > respiratory syncytial virus

(RSV)> metapneumovirus> influenza virus> adenovirus> measles> enterovirus

Pathophysiology

Inhalation of the viruses through nose to nasopharyngx Inflammation and edema of larynx, trachea swelling of the airways significantly reduce the diameter

and limiting airflow narrowing results in the barky cough, turbulent airflow and

stridor, and chest retractions Endothelial damage and loss of ciliary function fibrinous

exudate partially occludes the lumen of the trachea Decreased mobility of the vocal cords due to edema

hoarseness of voice viruses that cause croup can cause inflammation farther

down the airway and affect the bronchi

Clinical manifestation

Low grade fever, stuffy or runny nose, cough and coryza for 12-72h

Followed by increasingly bark-like cough and hoarseness.

Inspiratory stridor- harsh, high pitched respiratory sound produced by turbulent airflow (sign of upper airway obstruction); occur when excited, at rest or both

Respiratory distress of varying degree may develop quickly or slowly

+/- wheezing if involved lower airways

Assessment of severity

Stages (severity)

Characteristics

Mild Occasional barking cough, no audible rest stridor, and either mild or no suprasternal or intercostal recession

Moderate Frequent barking cough, easily audible rest stridor, and suprasternal and sternal recession at rest, with little or no agitation

Severe Frequent barking cough; prominent inspiratory stridor; marked sternal recession, decrease air entry and altered level of consciousness

Diagnosis Physical examination

>An examination of the throat may reveal a red epiglottis

> chest recession with breathing

> On auscultation may reveal prolonged inspiration or expiration,+/- wheezing, and decreased breath sounds

Neck Radiograph Not necessary-to exclude foreign body,

epiglottitis

> AP views of upper airways shows ‘steeple sign’- the tapered narrowing of the immediate subglottic airway

Management

Indications for hospital admission:o Moderate and severe viral croupo Poor oral intakeo Lives long distance from hospital, lacks

reliable transporto Toxic lookingo Age <6monthso Unreliable caregivers at home

Treatment Mild moderate

severe

outpatient inpatient inpatient

Antibiotic are not recommended unless bacterial super-infection is suspected or ptn very ill

Indications for Oxygen therapy:o Severe viral croupo Percutaneous SaO2 < 93%

Complication

Viral pneumonia (1-2%) Secondary bacterial pneumonia

Prognosis

Prognosis of croup is excellent Usually lasts 5days As children grow, they become less

susceptible to the resp viral infection

Prevention

Avoid contact with people who have respiratory infections

Hand washing *No vaccine for parainfluenza or

RSV

croup will be misdiagnosed with acute epiglottitis dt having similar symptoms with croup. However, the history and the severity of the symptoms will distinguish acute epiglottitis and viral croup

Acute epiglottitis

Inflammation of the epiglottis and soft tissue surround epiglottis. Can be life threatening due to complete obstruction of URT

Caused by H. influenza B

Viral croup Acute epiglotitis

Onset Over days Over hours

Preceding coryza Yes No

Cough Severe, barking Absent or slight

Able to drink Yes No

Drooling saliva No Yes

Appearance Unwell Toxic , very ill

Fever <38.5ºC >38.5ºC

Stridor Harsh, rasping Soft, whispering

Voice, cry Hoarse Muffled, reluctant to speak