SINUSITIS Sinusitis is the inflammation/infection of the mucosa of 1 or more paranasal sinuses. Definitions: Acute Bacterial Sinusitis : Bacterial infection of the paranasal sinuses lasting less than 30 days in which symptoms resolve completely. Subacute Bacterial Sinusitis : Bacterial infection of the paranasal sinuses lasting between 30 and 90 days in which symptoms resolve completely. Chronic Sinusitis : Episodes of inflammation of the paranasal sinuses lasting more than 90 days. Patients have persistent residual respiratory symptoms: cough, rhinorrhea, nasal obstruction.
ANATOMY / DEVELOPMENT 4 Sinuses: Maxillary, Ethmoidal, Frontal, Sphenoidal MAXILLARY SINUSES DEVELOPS DURING 3rd & 4th GESTATIONAL MONTH WITH PNEUMATIZATION BETWEEN BIRTH AND 12 MONTHS OF AGE ETHMOID SINUSES DEVELOPS DURING 3 rd & 4 th GESTATIONAL MONTH. IS PRESENT AT BIRTH, DEVELOPING UNTIL 12-14 YEARS OF AGE SPHENOID SINUS DEVELOPED BY AGE 8-10 YEARS FRONTAL SINUS DEVELOPS DURING 5 th AND 6 th YEAR.
In the sides of the nasal septum, there is 3 shelf-like structures where discharge is drain and is called Turbinates MAXILLARY ANT. ETHMOID MIDDLE MEATUS FRONTAL POST. ETHMOID SUPERIOR MEATUS SPHENOID LACRIMAL DUCTS INFERIOR MEATUS (Largest and most visible)
ETIOLOGY: Bacteria: S. pneumoniae (40%) H. influenza (30-40%) Moraxella catarrhalis Virus: Rhinovirus, adenovirus, influenza, parainfluenza Allergy (chemical and particulate irritants, allergens) EPIDEMIOLOGY: Occurs during viral respiratory season Attendance at Day Care Center School-age siblings in the household
Factors Predisposing To Obstruction Of Sinus Drainage A. MUCOSAL SWELLING Systemic disorder Viral URI Allergic inflammation Cystic fibrosis Immune disorder Immotile cilia Local insult Facial trauma Swimming Diving Rhinitis medicamentosa B. MECHANICAL OBSTRUCTION Choanal atresia Deviated septum Nasal polyp Foreign body Tumor Ethmoid bullae C. MUCUS ABNORMALITIES Viral URI Allergic Rhinitis Cystic fibrosis .
S/S: URI symptoms for > than 10 days (acute) or > than 12 weeks (chronic) *Low grade fever (50%) *Mucopurulent rhinorrhea in middle meatus or postnasal discharge. (95%) *Nasal mucosa congested/edematous *Cough present during daytime but is worse at night (90%) *Painless periorbital edema occurring in the morning and with bad breath. *Facial pain/pressure above or below the eyes, and Headache. It may change with position, increasing when leaning forward or during percussion. (70%) *Frontal, Maxillary, and Ethmoid area are tender to palpation/percussion *Periorbital swelling is suggestive of ethmoid sinusitis
SIGN/SYMPTOM SINUSITIS ALLERGY COLD Facial Pressure/ Pain Yes Sometimes Sometimes Duration of Illness Over 10-14 days Varies Under 10 days Nasal Discharge Thick, yellow-green Clear, thin, watery Thick, whitish or thin Fever Sometimes No Sometimes Headache Sometimes Sometimes Sometimes Pain in Upper Teeth Sometimes No No Bad Breath Sometimes No No Coughing Sometimes Sometimes Yes Nasal Congestion Yes Sometimes Yes Sneezing No Sometimes Yes
Lab: Transillumination of the maxillary and frontal sinuses Sinus X ray: air-fluid level, complete opacity, mucosal thickening Waters-3 views Coronal CT: demonstrate air fluids levels mucosal thickening, anatomical variations suspected intracranial or orbital complication. G.S. TX: Amoxicillin 40-90 mg/kg/day Amoxicillin/potassium clavulanate 80-90 mg/kg/day Ceftriaxone 50 mg/kg/day Erythromycin 50 mg/kg/day Omnicef (cefdinir) 14 mg/kg/day Azythromycin 10/5 mg/kg/day Humidifier with Normal saline, Mucolytics ( guaifenesin) Topical nasal steroids, Antihistamines (not recommended). Treat for up to 21 days or until free symptoms for 7 days
OTITIS EXTERNA (Swimmer’s ear) Acute otitis externa is defined as diffuse inflammation of the external ear canal, and the ear canal structures, involving the pinna or tympanic membrane. Characterized by pain caused by infection of macerated skin tissue Anatomy: The auditory canal is a curved structure Its medial 2/3 comprises a bone lined with a thin layer of skin. The outer 1/3 comprises cartilage with extensive subcutaneous tissue. It contains hair follicles, sebaceous and modified apocrine glands that produce cerumen that keeps the ear canal acidic (pH 6.1), and protects the middle ear from debris and trauma Etiology: Bacteria: Pseudomonas aeroginosa (G-) Viral: Herpes zoster/Simplex Staphyloccocus aureus Fungal: Aspergillus (90%-black spores) Candida
OTITIS MEDIA Inflammation and infection reaction to foreign antigens in the middle ear, that cannot drain via the Eustachian tube. It is the most common infection of early childhood. Anatomy of the Eustachian tube and immature immune systems of the children, contribute to the frequency of this infection. Classification: 1-Acute otitis media AOM 2-Otitis media with effusion OME 3-Chronic Otitis media COM Subcategories: Acute otitis media- Less than 3 weeks Recurrent otitis media- 3 weeks to 3 months Chronic otitis media- Greater than 3 months
LAB: Culture and sensitivity TX: Antibiotics: First Line: Amoxicillin (Amoxil) If not working: Amoxicillin with Potassium clavulanate (Augmentin) Cephalosporines 3 rd generation: Omnicef, Ceftin Ceftriaxone: Rocephin IM 3 doses Tympanocentesis If allergic to Penicillin: Azythromycin (Zithromax) Clarithromycin (Biaxin) Warm compresses on ears to relieve pain Acetaminophen or Ibuprofen for pain S. pneumonia produce a more acute course and slower resolution than H. influenza or Moraxella Complications: Mastoiditis, meningitis. OME Hearing decrease Hearing test
Timpanostomy Tubes: Insertion of ventilation tubes in the TM for ventilation/drainage. (Silicone) most recent development Incision on Anterior Inferior region. Not responding to ATB treatment Recurrent AOM infections in a period of time *Uni or bilateral chronic OME for more than 3 months. *Conductive hearing loss in excess of 30 dB in patients with Otitis media with Effusion *Recurrent AOM infections: Children with > 3 separate episodes within 3 months Children with 4 episodes in a 6 months period or with 6 episodes in a 12 months period
AOM WITH OTORRHEA THROUGH TYMPANOSTOMY Insertion of ventilation tubes in the TM for ventilation/drainage. Otorrhea is a major complication after their insertion Bacterial isolated: S.pneumonia, H. influenza, M. catarrhalis, S.aureus, P. aeruginosa. S/S: Fever, draining from ear, earache. Tx: Due to the inflammatory response from these bacterias, it is better to combine an Atb with dexamethasone 0.1% topical. (Ciprodex Otic for patients above 6 months, Floxin) If it is necessary, can give oral Atb.
Cholesteatoma. It is an accumulation of desquamated epithelium or keratin that often appears as a white mass behind or involving the tympanic membrane; it may be congenital or acquired. The acquired type is commonly caused by recurrent acute or chronic otitis media, but can also be iatrogenic (after tympanostomy tube placement or other procedures). Cholesteatoma can enlarge and erode the bone, including the ossicles, causing hearing loss. They can also become infected, leading to a foul-smelling discharge from the ear. A cholesteatoma needs to be removed surgically.
ALLERGIC RHINITIS Def. of Rhinitis: Is an inflammation of the nasal mucous membranes. However, with allergic rhinitis, other organs or tissues are involved, such as eyes, ears, sinuses, oropharinx. -Is an Immunologic Hypersensitivity Disorder Type I -Is often a predisposing factor or exacerbation of asthma, rhinosinusitis, nasal polyps. -Characterized by one or more nasal Sx- sneezing, itching, congestion, rhinorrhea. -Diagnosis is based on Hx, physical findings, and Lab.
Impact of Allergic Rhinitis Most common form of atopic disease Affects 40 million Americans Prevalence estimates: 10/30% of adults, 40% of children Peak incidence in childhood and adolescence Almost 70% of the patients have nasal congestion Nearly 17 million office visits a year Direct costs per year of about 6 billion dollars Increase absenteeism and reduced productivity 75/80% of patients with asthma have allergic rhinitis. Genetics: High incidence in families with atopic disease (eczema, asthma)
Classification: Seasonal: Yearly intervals, periodic symptoms, often due: to outdoor allergens-pollens, tree pollens (spring), grass (summer), ragweed (mid August). Mold spores Perennial: Throughout the entire year, due to multiple seasonal allergies or continue exposure to: indoors allergen: Dust mite (Dermatophagoides), animal dander, cigarette smoke, hair spray, paint, mold, cockroaches outdoor allergens: Pollens, tree pollens (spring), grass (summer), ragweed (mid August). Mold spores
PATHOPHYSIOLOGY Allergens bind to specific IgE on Mast cells in Respiratory mucosa Enzymatic reactions occurs within the cell Release of mediators (histamine, leukotrienes, prostaglandins) from mast cells triggering IgE, leads to a complex interaction of inflammatory mediators, causing inflammation of the mucous membranes of eyes, nose, Eustachian tube, sinuses and/or pharinx.
There are 2 phases of allergic response: Early phase response to antigen: < 5- 30 minutes after allergen exposure. -Allergen comes in contact with IgE-primed mast cells and basophils -Caused by the immediate release of histamine and other mediators (leukotrienes). -Causing bronchoconstriction, edema, and stimulation of mucous gland that leads to: Production of secretions: Increase in vascular permeability leads to plasma exsudation Vasodilation leads to nasal congestion and sinus pressure Late phase response to antigen: 2-12 hours after allergen exposure Characterized by sx beginning 4-8 hours after allergic exposure. This phase occurs because of inflammation resulting from the recruitment of inflammatory cells (Cytotoxic proteins released by neutrophils, eosinophils, macrophages, lymphocytes – damaging the Epithelial cells) to the mucous membranes. This phase has more congestion, rhinorrhea and less sneeze/itching.
S/S: Seasonal: Clear and watery drainage from nose (rhinorrhea) tearing of the eyes and red eyes frequent sneezing Lesser mouth breather Itching of their nose, eyes, palate / throat (erythema can be seen) eczema, family Hx. of atopy support the Dx. of allergic rhinitis. Perennial: Year round symptoms, nasal congestion ( major complaint ) post-nasal drainage (dry cough) mouth breather decreased sense of smell/or taste. Other SX: ↓ in physical functioning, energy and fatigue, social events, ↑ in pain and limitations of emotions, ↓ quality of life
“ allergic shiners” Dark circles under the eyes (Moonshiners). Chronic venous stasis from sinus congestion “ Dennie-Morgan”: single or double lines under the eyes due to chronic edema. Allergic salute: Rubbing of the tip of the nose upward to ↓ itching Allergic crease: Transverse line near the tip of the nose, secondary to rubbing Nasal mucosa: Pale color, edema of turbinates (inferior), clear watery secretion, colored mucus secretion Nasal polyps: Gray color, peeled-grape appearance, insensitivity to touch
Upper Respiratory Infection-Common Cold Etiology: Rhinoviruses, Parainfluenza, RSV, Adenovirus Risk factors: Day care, smoking, crowding, temperature changes S/S: Nasal/throat irritation Sneezing, nasal congestion, rhinorrhea Sore throat, postnasal drip Low grade fever, HA, malaise, myalgia Can lead to AOM, Sinusitis, asthma TX: Fluids, supportive
INFECTIOUS RHINITIS Most common cause of nasal symptoms in children is viral URI. Specially in day care/kindergarten/winter months Last between 7-14 days, symptoms resolving around the 7th/8th day Fever may or may not appear Clear mucus discharge, changing to green/yellow after a few days, Cough post nasal drip Turbinates can be swollen and erythematous. Secretions are watery or thick, clear or colored. Complicated by sinusitis or obstruction by adenoidal hypertrophy TX: ATB (purulent mucus), mucolitics, cough syrup
LAB: CBC- Eosinophilia Nasal cytology- Eosinophilia. Greater than 10% is (+) Skin testing- Prick/puncture in skin 10-20 allergens. Immediate hypersensitivity with immediate results. There is a small chance of triggering a severe allergic reaction in someone highly allergic. RAST– Radio Allergo Absorbent Test: Measure allergen- specific IgE, measure specific IgE to individual allergen in a sample of blood. Is less sensitive than skin testing. Total IgE: Elevated in allergic rhinitis
TX: Environmental control: Avoidance of specific allergens. 1-Outdoor allergents: Pollens/outdoor molds: limit outdoor activity during allergy season Keep windows and doors closed Wear a mask while doing yard work. 2-Indoors: Use dust mite anti-allergic pillow and mattress plastic covers Reduce indoor heat and humidity decreasing proliferation of mites Eliminate carpeting, and use linoleum, tiles. Avoid feathers in pillows and covers. Molds: Eliminate areas of dampness and standing water Clean mold area Pets : Avoid as much as possible or don’t have them Use HEPA filters and A/C Eliminate cockroaches
Nasal Steroids: Effective for itching, sneezing, rhinorrhea, nasal congestion More effective than oral antihistamine. Budesonide (Rhinocort), flonase, nasonex Antihistamine: Block H1 receptors suppressing most of symptoms First generation: H1 antagonist with anticholinergic effects ( sedating, dry mouth, tachycardia ) Effective for most Sx. of allergic rhinitis, but on congestion is limited. Benadryl (dyphenhydramine) Second generation: H1 antagonist with no/less anticholinergic sedating effect. Effective for most symptoms, improved but not efficient on congestion. Zyrtec (cetirizine), Clarinex ( desloratidine ) Singulair (montelukast-Leukotrienes blockers)
Topical cromolyn sodium (Nasalcrom-Intal ): Mast cell stabilizer Used above 6 years of age Oral decongestants : alpha-1-adrenergic agonists: phenylephrine, phenylpropalamine.- Sudafed Cause vasoconstriction, ↓ blood supply to nasal mucosa / edema Topical decongestants: Sympathomimetics. Side effects-drying and burning of the mucosa. Using more than 5 days- rebound vasodilation and congestion. Oxymetazoline -Afrin Combined oral decongestant and antihistamines: Extendryl / Rondec- chlorpheniramine Mucolytics: Thin mucus, improving mucociliary flow. Steam, NS drops, Guaifenesin, N-acetylcysteine Immunotherapy: Given to patients that not responded to drug therapy and good environmental control
EPISTAXIS Is bleeding from the nose, being evident anteriorly through the nares or posteriorly through the nasopharynx. Etiology: vide slides Pathophysiology: Nasal mucosa blood supply originates from internal/external carotid Blood vessels of nasal septum and lateral walls have little protection, and the thin mucosa is prone to drying. Most important vascular plexiform network is the: Kiesselbach’s plexus in the anterior nasal septum. Woodruff’s plexus in the posterior part of nasal septum Epidemiology: Children 2-10 years are most commonly affected Nosebleed are more common in winter.
S/S: Family Hx of hemorrhagic disease Hx of trauma or nose picking Hx of medications or drug abuse Hx of allergies, nasal congestion, discharge, obstruction Check vital signs with BP determination. Inspect nose, nasopharinx, oropharinx. Check liver/spleen enlargement, pallor, lymph nodes. Lab: CBC, Platelets, PT, PTT, BT, CT TX: Keep patient sitting with the head elevated Direct pressure with gently squeezing of the nostrils. Ice compresses to the nasal dorsum Vasoconstricting agents: 0,25% Phenylephrine, 0,05% Oxymetazoline, 1:1,000 Epinephrine. Cauterization with: Silver nitrate stick or swab with trichloroacetic Acid Anterior nasal packing with oxycellulose gauze (Surgicel) or absorvable gelatin sponge (Gelfoam) ENT specialist for: severe bleeding, posterior packing, fracture, reduction/surgery
PHARYNGITIS-TONSILITIS Inflammation/infection of the membrane and underlying structures of pharynx and tonsils. Epidemiology: Streptococcal pharyngitis-more common between 5-15 years. Viral pharyngitis: Most of cases are due to a virus, at young age, winter Day care/kindergarten is a risk factor Etiology: Bacterial: G-A beta hemolytic streptococcus (S. pyogenes #1) Corynebacterium diphteria Viral: Adenovirus (mcc), EBV virus, Coxsackie (herpangina) Fungi: Candida (trush)- immunosuppressed infants. Chlorinated pool: adenovirus pharyngoconjunctival fever
S/S: Symptoms: Strep: ↑ fever, sudden onset, headache, N/V, often abd. Pain. Viral: Rhinorrhea, cough, hoarseness, conjunctivitis, ulcerative lesions Signs: Pharyngeal erythema, tonsils ↑ yellowish exsudate, cervical tender lymph Petechia in soft palate and uvula, White pustules on the palatine tonsils Dysphagia, bad breath GAS Scarletiniform rash suggest GAS Splenomegaly and generalized adenopathy, rash after ampi/amox EBV !!!!!!!
Peritonsillar Abscess Complication of tonsillitis/pharyngitis result in abscess in tonsillar fossa Cause: Group A B-hemolytic Strept., Staph aureus, Anaerobic bacteria Complication: Upper Respiratory Obstruction S/S: Fever, sore throat, dysphagia, trismus (pain when opening the mouth), Muffled voice (hot potato) , Drooling , Cervical adenopathy , Unilateral peritonsillar bulging, superior soft palate with deviation of the uvula . Unilateral neck pain. Pharinx: erythematous/edematous with enlarged and exsudative tonsils. Lab: CBC- leukocytosis with left shift, Rapid Strep test, gram stain. Cx of aspirate specimen. CT or U/S TX: High dose IV penicillin. Surgical drainage if needed. Tonsillectomy. Clindamycin, nafcillin, oxacillin if Staph is cultured
FOREIGN BODY ASPIRATION Children often ingest or aspirate a foreign body, with variable outcomes. Missed or late diagnosis may lead to serious morbidity or death. Children will put almost anything they find into their mouth; like food (peanuts, grapes, candy, hot dog), batteries, buttons, coins, crayons, jewelry, marbles, paper clips, pen caps, pins, screws, toy parts, chicken or fish bones. History: Most ingestions and aspirations of a foreign body occur in a normal child in their home, under their parents care. Poor safety proofing; unattended child, running with food, or handling a small object It’s a toddler with a sudden onset of cough, choking, persistent wheezing, gags, and vomits at the time of ingestion Peak age: 6 months-4 years Pathology: Usually foreign object lodge below the carina. In toddlers, lodge in either mainstem In older children, they lodge in the Right mainstem
S/S: Acute: Coughing, Gagging, Choking, Wheezing (localized) Chronic: asymmetrical/absent breath sounds, recurrent pneumonia Most common object: Peanut, then Candy, coins, grapes, Hot Dog CXR: Lower Airway Area: Unilateral hyperinflation, Air trapping on affected side. Atelectasis Mediastinum shift AWAY from affected side/atelectasis Esophageal area: lodged at one of these locations: Thoracic inlet Level of aortic arch and left mainstem bronchus Gastroesophageal junction,. CT scanning supplemented with virtual bronchoscopic imaging may further provide such useful information prior to an attempt at bronchoscopy TX: Removal by Rigid bronchoscopy, under anesthesia Inhalation to relieve bronchospasm following removal Complications: Aspiration Pneumonia, Lung abscess
Epiglottitis A rapidly progressive and potentially fatal acute life threatening bacterial infection of the epiglottis, resulting in narrowing of the glottic opening Epiglottitis - Pathogenesis Haemophilus influenzae type B. (Rare due to Hib vaccine) Streptococcus Pneumonia, Streptococcus Group A Inflammation and edema of the epiglottis, arytenoids, arytenoepiglottic folds, and subglottic area Epiglottis pulled down into larynx and occludes the airway Differential Diagnosis Viral croup - barking cough, less abrupt, less toxic Bacterial tracheitis- S. aureus, H. influenzae, Strept., diphtheria Aspiration of a foreign body
Epiglottitis - Clinical Manifestations * Abrupt onset of high fever (39- 40 degree celsius) *Rapid onset of toxicity *Rapid onset of respiratory distress (12 hours), drooling, chest wall retractions, inspiratory stridor, ronchi, retraction and late cyanosis, sore throat. *Muffled voice *Child prefers sitting in up position and leaning forward with hyperextended chin to maintain airway open. *Beefy-red epiglottis, dysphagia
ACUTE EPIGLOTTITIS WITH ERYTHEMA AND SWELLING
On the left, an endoscopic view of the throat shows almost complete blockage of the airway (arrow). This finding is typical of epiglottitis. On the right, the airway has been opened (arrow) after insertion and removal of an endotracheal tube, although some redness and blood remain
Barking cough, Inspiratory stridor, Hoarseness, due to subglottic inflammation
Parainfluenza virus type 1(m.c), type 2 and 3, RSV, influenza A/B
-Virus enters body via respiratory droplets through nasopharynx airway
-There is an immune response, resulting in subglottic narrowing
-Edema and erythema of the mucosa of the subglottic tissue and / or tracheal mucosa,
further narrowing the airway, resulting in stridor, hoarseness, cough may lead to those
Hypoxia/hypercarbia: Air hunger, Anxiety/Lethargy
Epidemiology: Occurs mainly between 6-36 months. Self limited Ds. lasting 3-5 days. Prevalent in late fall/winter Person-to-person transmission via respiratory droplets. S/S: Prodrome: Coryza, nasal congestion, sore throat, cough, low grade fever Characteristic: hoarse voice and barking cough (mainly at night), loud inspiratory stridor, mild respiratory distress (sternal / suprasternal retractions, cyanosis) no sign of toxicity. LAB: X-Ray: The AP x-ray of the neck, shows the “ Steeple” sign. Narrowing of subglottic space The lateral view is useful in ruling out epiglottitis. Pulse oximetry- determine if hypoxia is present. Differential Diagnosis: Laryngomalacia, Peritonsillar abscess, Aspiration Epiglotitis, Bacterial Tracheitis
TX: Rest at home, fluids Humidified air: by tent, face mask, cool mist vaporizer, steam in bathroom If Resp. distress- Intubate under visualization in the O.R. Don’t wait for X-ray Epinephrine: Use with NS in a nebulizer (0.5 ml/kg 1:1000 sol.) Dexamethasone: 0,6mg/kg IM. Decrease edema and inflammation Nebulized Budenoside-decrease laryngeal mucosa edema If severe: require intubation and ICU. Heliox prevent intubation Atb: If necessary.
Differences between Croup, Epiglottitis, Tracheitis Characteristic Epiglottitis 3 m-3 y H. influenza Croup 3-6 years Parainfluenza virus Tracheitis 3 y-10 y Staph aureus Appearance toxic and unwell well looking Well to toxic Onset abrupt onset 4-12 hours viral prodrome, slower onset 1-7 days 2-3 days SX, with 10 hours decompensation Fever high fever (>38.5 o C) Low-moderate Moderate to high Stridor usually moderate-severe usually mild-moderate Mild inspiratory stridor Cough minimal or absent barking, seal-like quality Barking cough Speech unable to speak Muffled voice hoarse voice Hoarse voice Secretions unable to swallow, drooling of saliva able to swallow Mild secretions
Tx: Oxygen to correct hypoxia: when O2 is less than 91%. Wean when higher than 94% saturation Correct Acidosis if necessary Aerolized B-adrenergic (albuterol): wheezing treatment ? IV fluids to correct losses secondary to poor intake. Corticoids: should not be used for routine care Aerolized Ribavirin. (Virazole- Good if RSV caught before the 3 rd day) Only FDA approved treatment for RSV-Lower respiratory tract infection in hospitalized infants Mist tent (nebulization) RSV vaccine for prematures and high risk infants.- Synagis (Palivizumab) Admission to hospital: hypoxia, no PO intake, severe Resp. Distress, toxic appearance, < 3 months.
BRONCHITIS: Inflammation of the major conducting airways. Etiology: Viral (most common), following URI Bacterial: S. pneumonia, M. catarrhalis, H. influenza Allergic S/S: Dry hacking cough, nasal discharge, Low grade fever. Chest pain worse with coughing Thin clear sputum becomes purulent over 3-4 days, clears by 10 th day Scattered ronchi, sometimes wheezing LAB: WBC- normal to elevated CXR- increase in bronchovascular markings DD: asthma, foreign body TX: rest, fluids, mucolitics, cough suppressant (limited use), Nebulizations, ATB if necessary
ASTHMA Is a chronic inflammatory disorder affecting large and small airways Is a Reversible airways Ds, characterized by: Airway inflammation Secretion of mucus Bronchoconstriction Hyperresponsiveness to various stimuli Epidemiology: Most common chronic illness in children 12-15% of school age children 80-90% of children will have first symptom by age 3 60-70% will be free of symptoms by adulthood Etiology: Extrinsic- caused by several allergens, family history always positive Intrinsic- caused by: cold, infection, exercise, emotional,
Pathophysiology: Immune system is made up of: B and T cells. T cells distinguish foreign invaders: bacterias, viruses, allergens B cells produce antibodies that help fight off infecting organism Airway is invaded by inflammatory cells- mast cells, baso, eosino, neutrophils, B/T lymphocytes, macrophages One of the antibodies produced by the immune system is the IgE known as the allergic antibody. -Allergens/infections antigens triggers inflammatory/immune response in airways. -IgE binds to Mast cells, found in the lining of nose, lungs, skin making the Mast cells to release chemicals such as histamines -IgE response initiate inflammation and bronchospasm -Inflammatory cells respond producing mediators- cytokines, leukotrienes elevating inflammatory response, stimulating constriction of smooth muscle in bronchioles. -Airway smooth muscle becomes hyperresponsive bronchospasm.
CHRONIC: -Avoidance of known triggers. -Beta2 Agonists MDI (Proventil, Ventolin) -Leukotrienes Modifiers: Montelukast (Singulair). Decrease # of eosinophils. Block effect of inflammatory mediators. -Inhaled steroids (Pulmicort). -Combination Fluticasone/Salmeterol: Advair -Exercices (swimming) -Immunotherapy: XOLAIR anti-IgE immunomodulator, blocking its interaction with mast cell and basophils.
PNEUMONIA Inflammation and infection of the lung parenchyma due to bacterial or viral pathogens. Classified by anatomy: Lobar, Interstitial, Bronchopneumonia Etiology: Viral: Adenovirus, Influenza, RSV Bacterial: Neonates: GBS, Chlamydia, E. coli, Listeria monocytogenes 1month-6 years: S. pneumonia, H. influenza Adolescents: S. pneumonia, Mycoplasma pneumonia Immunocompromised: Pseudomonas, klebsiela, Fungi, PCP
Epidemiology: Children 2-4 years, are more susceptible than older children May follow epidemics of viral infection Winter/spring most common Day care/ kindergarten S/S: Tachypnea, dyspnea, cough, intercostal retractions, nasal flaring, grunting, fever, accessory resp. muscles usage, chest pain, lethargy, hypoxia, rales/crackles, decreased breath sound/dullness to percussion (consolidation). LAB: CBC: WBC with left shift, Blood culture (if severe picture), Pleural fluid studies (effusion), ABG CXR: Lobar consolidation ( S. pneumonia and H. influenza ), Hilar adenopathy ( TB ), Pneumatoceles ( S. aureus/G- ), Bilateral diffuse infiltrate ( Mycoplasma ), Abscess ( klebsiella ) Mycoplasma: Presence of Cold agglutinin titers Prevention: Pneumovax vaccine in immunocompromised children, SC Ds.
ATB according to Pathogen: S. aureus : Nafcillin, Oxacillin S. Pneumonia : Penicillin G, Ampicillin, Cephalosporin. Resistant: Vancomycin H. influenza : Cephalosporin 3rd generation G- : Aminoglycoside with broad activity: Amikacin, Tobramycin, Gentamycin Anaerobic infection (aspiration pneumonia) Penicillin, Clindamycin Mycoplasma pneumonia/Chlamydia : Erythro/Azythromycin, Doxycycline TX: Outpatient: ATB (Amoxil, Ampicillin, Erythro-10 days), inhalation, rest, fluids. Inpatient: Toxic appearance, Severe Resp. Distress, Hypoxic, Unable to take PO Age < 2 Humidified oxygen as needed, IV fluid for hydration Drainage of pleural effusion if necessary ATB: Neonates : Ampicillin, Gentamicin, 3rd Gen. Cephalosporin (Cefotaxime), Pen. Older chidren : Ampicillin, 3rd Gen. Cephalosporin (Cefotaxime, Ceftriaxone)
SUDDEN INFANT DEATH SYNDROME- “CRIB DEATH” Sudden and unexpected death of an infant less than 1 year old. Age 2-4 m Etiology: Poverty (Bed Sharing) Low birth weight, SGA, Prematurity Maternal substance abuse Hypo/Hyperthermia, Exposure to cigarette smoking Pathophysiology: Unknown. Theories: central apnea, Upper airway obstruction, Cardiac arrythmias, prone sleeping position. Epidemiology: 1.5/ 1000 live births. 6.000/10.000 deaths/year in USA TX: Resuscitation if possible Prevention: Avoid prone position and usage of soft or loose bedding. Place infant on his “ BACK” to sleep on a firm mattress.