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Epiglottite, groppa grave, stridore e ostruzione delle vie aeree superiori

I numeri di emergenza variano in base al Paese. Questa pagina utilizza 911, il numero per gli Stati Uniti e il Canada. Molti altri paesi utilizzano 112, 999 o un altro numero. Trova il numero per il tuo paese.

Un’ostruzione acuta delle vie aeree superiori causata da un gonfiore infettivo dei tessuti della gola è una delle emergenze in più rapida evoluzione nella medicina pediatrica e adulta. Nel giro di pochi minuti o ore, l'infiammazione batterica dell'epiglottide (epiglottite acuta), un grave gonfiore virale sotto le corde vocali (laringotracheobronchite o groppa) o un'infezione batterica profonda della trachea (tracheite batterica) possono restringere il passaggio respiratorio fino a formare uno stenopeico. Poiché la trachea di un bambino ha all'incirca il diametro del mignolo, anche 1 millimetro (0,04 pollici) di gonfiore della mucosa all'interno delle vie aeree di un bambino riduce l'area respiratoria della sezione trasversale di oltre il 60% e aumenta la resistenza al flusso d'aria di sedici volte.

Quando una via aerea superiore infiammata si restringe in modo critico, il paziente sopravvive solo sedendosi con la posizione eretta, sporgendosi in avanti e tenendo il collo in una posizione precisa che mantiene aperta una piccola fessura d'aria. Il pericolo maggiore durante il primo soccorso preospedaliero è la chiusura iatrogena completa delle vie aeree innescata da soccorritori ben intenzionati che costringono un bambino o un adulto in preda al panico a sdraiarsi sulla schiena, provano a guardargli la bocca con un cucchiaio o una torcia elettrica o fanno arrabbiare un bambino che piange. Sapere come distinguere il terrore improvviso, silenzioso e sbavante dell'epiglottite dalla tosse color ottone della groppa virale, perché è necessario mantenere il paziente calmo nella posizione del treppiede prescelta e quando la nebbia fresca o l'aria umidificata aiutano a mantenere aperte le vie aeree fino all'arrivo di un'équipe medica di emergenza.

Fallo adesso

  1. Chiama immediatamente il numero di emergenza locale se qualcuno ha un respiro rumoroso a riposo (stridore), sbava con incapacità di deglutire, una voce soffocata da "patata bollente", postura su treppiede o labbra bluastre. Chiama il 911 negli Stati Uniti e in Canada, 112 nell'Unione Europea, 999 nel Regno Unito, 000 in Australia, oppure controlla l'elenco dei numeri di emergenza. Richiedi un'ambulanza di supporto vitale avanzato (ALS) e dichiara chiaramente che sospetti gonfiore acuto delle vie aeree superiori o epiglottite in modo che i paramedici si avvicinino silenziosamente senza sirene a tutto volume alla porta.
  2. Non forzare MAI una persona con stridore, sbavatura o grave gonfiore alla gola a distendersi sulla schiena. Lasciare che il paziente si sieda completamente eretto in qualunque posizione gli sembri più facile respirare, di solito inclinandosi in avanti sulle mani con il mento leggermente spinto in avanti (il treppiede o la posizione di sniffing). Per un neonato o un bambino piccolo, lascialo sedere in posizione eretta, tenuto tranquillamente in grembo e in braccio ai genitori.
  3. Non mettere MAI un abbassalingua, un cucchiaio, un dito, un termometro o una torcia elettrica in bocca per guardare la gola. Toccare la parte posteriore della lingua o forzare l'apertura della mascella in caso di sospetta epiglottite innesca un laringospasmo vagale istantaneo o spinge l'epiglottide gonfia, rosso ciliegia, verso il basso come un tappo nella trachea, causando un'ostruzione immediata e irreversibile delle vie aeree.
  4. Mantenere un bambino spaventato il più calmo e tranquillo possibile tra le braccia dei genitori. Piangere, urlare e litigare aumentano il flusso d'aria turbolento attraverso la gola ristretta (effetto Bernoulli), che risucchia verso l'interno le pareti gonfie delle vie aeree e peggiora l'ipossia. Non separare il bambino dalla persona che si prende cura di lui, non cercare di togliergli i vestiti se non necessario e ridurre al minimo le luci intense o i rumori forti.
  5. Tenere il paziente rigorosamente NPO (niente per bocca). Non offrire acqua, latte, succhi di frutta, ghiaccioli, miele o sciroppi per la febbre orale (come paracetamolo liquido o ibuprofene) a chiunque sbavi, abbia difficoltà a deglutire o emetta suoni stridenti acuti a riposo. Il tentativo di ingoiare liquidi oltre l'epiglottide gonfia provoca soffocamento violento e laringospasmo fatale.
  6. Se il bambino ha la classica tosse "da foca che abbaia" (groppa virale) SENZA sbavare, si siede comodamente e ha un lieve stridore solo quando piange, esporlo all'aria fresca notturna o alla nebbia del bagno monitorando attentamente. Sedersi in un bagno con nebbia fredda o respirare aria fresca notturna all'aperto per 10-15 minuti mentre lo conforta, spesso fa restringere il gonfiore virale sottoglottico abbastanza da alleviare il leggero groppa, sebbene qualsiasi stridore presente mentre il bambino è calmo e riposa richiede una valutazione medica immediata e una prescrizione corticosteroidi.

Perché costringere un paziente affetto da epiglottite a sdraiarsi provoca un arresto cardiaco istantaneo

Nell'epiglottite batterica acuta, il lembo di cartilagine che copre la trachea si gonfia fino a tre o quattro volte la sua dimensione normale, diventando una palla pesante, paludosa, rosso ciliegia in bilico direttamente sopra le corde vocali. Finché il bambino o l’adulto si siede in posizione eretta e si sporge in avanti con il mento esteso, la gravità spinge leggermente in avanti l’epiglottide gonfia e la base della lingua, lasciando uno stretto spazio a forma di mezzaluna nella parte posteriore della gola per il passaggio dell’aria. Nel momento in cui qualcuno distende il paziente sulla schiena su un letto, un divano o una barella dell'ambulanza, la gravità fa cadere l'epiglottide pesante e gonfia direttamente all'indietro sopra le corde vocali come una botola, sigillando completamente le vie aeree. Trasportare e trattare sempre i pazienti con ostruzione delle vie aeree superiori seduti in posizione eretta.

Albero decisionale di emergenza per stridore acuto e gonfiore delle vie aeree superiori

flowchart TD
    Start["Sudden Noisy Breathing (Stridor), Hoarseness, Barking Cough, or Severe Throat Pain"]
    ChokeCheck{"Did this start INSTANTLY (within seconds)<br/>while eating, playing with small toys, or holding an object in the mouth,<br/>with NO fever or prior illness?"}
    ForeignBody["SUSPECTED FOREIGN-BODY CHOKING / AIRWAY OBSTRUCTION<br/>1. If unable to speak, cough, or breathe: Perform Back Blows & Abdominal Thrusts<br/>   (or Back Blows & Chest Thrusts for infants under 1 year)<br/>2. If coughing forcefully or breathing with stridor: Call EMS immediately;<br/>   do NOT perform blind finger sweeps; keep patient upright"]
    AllergyCheck{"Was the patient exposed to a bee sting, peanut/food allergen,<br/>medication, or has a history of hereditary angioedema,<br/>with swollen lips, tongue, or hives?"}
    Anaphylaxis["ANAPHYLACTIC AIRWAY EDEMA / ANGIOEDEMA<br/>1. Inject Epinephrine Auto-Injector into outer mid-thigh immediately<br/>2. Call EMS (911 / 112 / 999) for urgent transport<br/>3. Keep patient sitting upright if airway/tongue is swollen (unless hypotensive)<br/>4. Give second epinephrine dose at 5 to 15 minutes if no improvement"]
    RedFlagCheck{"Are ANY Epiglottitis or Severe Obstruction Red Flags Present?<br/>- Drooling saliva / unable to swallow own spit<br/>- Sitting upright leaning forward (Tripod / Sniffing posture)<br/>- Muffled 'Hot Potato' voice & absence of barking cough<br/>- High-pitched stridor heard even when resting quietly<br/>- Sternal/rib retractions, lethargy, or bluish/pale skin"}
    EpiglottitisProtocol["CRITICAL UPPER AIRWAY EMERGENCY (EPIGLOTTITIS / SEVERE CROUP / TRACHEITIS)<br/>1. Call EMS (911 / 112 / 999) immediately; request quiet ALS approach<br/>2. Keep patient sitting 100% UPRIGHT (child held in parent's lap)<br/>3. DO NOT look in mouth, DO NOT use tongue blade, DO NOT lay flat<br/>4. Keep strictly NPO (no water, no oral fever medicine)<br/>5. Keep child calm; allow parent to hold blow-by oxygen near face if EMS provides it"]
    MildCroup["LIKELY MILD TO MODERATE VIRAL CROUP (LARYNGOTRACHEOBRONCHITIS)<br/>(Barking seal-like cough, hoarse voice, able to swallow, NO drooling,<br/>NO stridor when resting quietly, alert and drinking fluids)<br/>1. Hold child upright and calm them immediately to stop crying<br/>2. Expose to cool outdoor night air (wrapped warmly) or cool-mist humidifier for 15 min<br/>3. Contact physician or urgent care for single-dose oral Dexamethasone<br/>4. Watch continuously for resting stridor or rib retractions"]

    Start --> ChokeCheck
    ChokeCheck -->|Yes: Sudden Onset, No Fever| ForeignBody
    ChokeCheck -->|No: Preceded by Fever, Cold, or Sore Throat| AllergyCheck
    AllergyCheck -->|Yes: Hives, Lip/Tongue Swelling, Allergen| Anaphylaxis
    AllergyCheck -->|No: Infectious / Inflammatory Pattern| RedFlagCheck
    RedFlagCheck -->|Yes: ANY Red Flag Present| EpiglottitisProtocol
    RedFlagCheck -->|No: Barking Cough Only, Calm at Rest| MildCroup

Confronto delle emergenze delle vie aeree superiori potenzialmente letali

Quando un bambino o un adulto sviluppa una respirazione rumorosa (stridore) o disturbi alla gola, è necessario distinguere rapidamente cinque principali condizioni infettive e non infettive. A differenza del sibilo (un suono musicale, un sibilo, udibile principalmente durante l'espirazione da un restringimento dei bronchi inferiori nell'asma), lo stridore è un suono aspro, acuto, simile a un canto o a un seghetto, udibile principalmente durante l'inspirazione (o sia l'inspirazione che l'espirazione in caso di grave restringimento sottoglottico) causato da un flusso d'aria turbolento attraverso la parte superiore della gola, la laringe o la trachea parzialmente bloccate.

Caratteristica clinica Epiglottite acuta (supraglottite) Groppa virale (laringotracheobronchite) Tracheite batterica (groppa membranosa) Ascesso retrofaringeo Aspirazione delle vie aeree da corpo estraneo
Sede anatomica dell'ostruzione Sovraglottideo: epiglottide, pieghe ariepiglottiche e tessuti molli sopra le corde vocali Sottoglottica: Mucosa dell'anello cricoideo direttamente sotto le corde vocali Tracheale: Trachea sotto la cartilagine cricoidea, piena di pus denso e pseudomembrane staccate Spazio prevertebrale profondo del collo: Parete faringea posteriore dietro la gola Lumen laringeo o tracheale: Cibo, monete, batterie a bottone o piccole parti di giocattoli in plastica
Fascia d'età tipica e agente causale Tradizionalmente bambini dai 2 ai 7 anni; ora sempre più comune negli adulti (dai 20 ai 60 anni) e nei bambini non immunizzati.
Batteri: Haemophilus influenzae tipo b (Hib), Streptococcus pneumoniae, Gruppo A Streptococcus, Staphylococcus aureus
Neonati e bambini piccoli di età compresa tra 6 mesi e 3 anni (picco a 18 mesi).
Virus: Virus parainfluenzali (tipi 1, 2, 3), RSV, influenza A/B, adenovirus, SARS-CoV-2
Children aged 6 months to 8 years, often following several days of viral croup or flu.
Bacteria: Staphylococcus aureus (including MRSA), Streptococcus pyogenes, Moraxella catarrhalis
Young children aged 6 months to 4 years (before retropharyngeal lymph nodes atrophy); adults after fishbone trauma Toddlers aged 1 to 4 years; older adults with neurological swallowing disorders or alcohol intoxication
Speed of Onset & Prodrome Hyper-acute (2 to 6 hours in children; 12 to 24 hours in adults): Goes from healthy or mild sore throat to toxic, high fever, and terrifying airway distress within hours Gradual (24 to 72 hours): Starts with 1 to 3 days of runny nose, mild cough, and low-grade fever, then suddenly worsens at night between 11:00 PM and 4:00 AM Biphasic: Starts like mild viral croup for 2 to 4 days, then crashes into high fever, toxic appearance, and severe airway obstruction Subacute (2 to 5 days): Preceded by pharyngitis, ear infection, or sinus infection with steadily worsening neck pain and fever Instantaneous (seconds): Sudden violent coughing, gagging, or choking while eating or playing, with zero fever
Cough & Voice Character NO barking cough (cough is absent or painful and muffled); classic muffled "Hot Potato" voice (sounds like talking with a mouthful of hot food) Classic loud, brassy "barking seal" cough; hoarse, raspy voice or cry Painful, brassy cough that occasionally produces thick mucopurulent plugs; hoarse or stridulous voice Muffled voice ("duck quack" or hot potato quality); rarely has a barking cough Sudden aphonia (inability to speak or cry) in complete obstruction, or harsh coughing and biphasic stridor in partial obstruction
Swallowing & Drooling (Sialorrhea) Severe drooling (sialorrhea) in > 80% of pediatric cases; extreme pain on swallowing (odynophagia); refuses all liquids Swallows saliva normally; no drooling unless exhausted; usually willing to sip fluids Minimal drooling compared to epiglottitis, as swelling is below the vocal cords Drooling is common due to severe pain when trying to swallow past the bulging back wall of the throat May drool if a large object (coin, meat bolus, button battery) is wedged in the upper esophagus compressing the back of the trachea
Preferred Body Posture Classic Tripod / Sniffing Posture: Sitting bolt upright, leaning forward on hands, neck hyperextended, chin thrust forward, mouth wide open, tongue protruding Sits or lies in parent's arms; agitated when crying, settles when comforted unless hypoxia develops Sits upright, anxious and toxic-appearing; does NOT improve with cool mist or nebulized racemic epinephrine Neck held rigid in hyperextension or tilted to one side (torticollis); severe pain if asked to touch chin to chest Leaning forward coughing or clutching throat (Universal Choking Sign)

Anatomy and physics of upper airway obstruction

Why a 1-millimeter swelling is an inconvenience in an adult but a catastrophe in a child

To understand why an infant or toddler with croup or epiglottitis can deteriorate from noisy breathing to respiratory arrest in minutes, emergency clinicians apply Poiseuille's Law of Laminar and Turbulent Fluid Flow:

  1. The Resistance-to-Radius Fourth-Power Rule (\(R \propto \frac{1}{r^4}\)): When airflow is smooth (laminar), airway resistance is inversely proportional to the fourth power of the airway radius (and when crying causes turbulent airflow, resistance scales with the fifth power of the radius).
  2. Pediatric vs. Adult Airway Dimensions:
  3. A normal infant or toddler's subglottic airway at the cricoid cartilage ring has an internal diameter of only 4 millimeters (0.16 inches) (a radius of 2 mm). If viral croup causes just 1 millimeter of circumferential mucosal swelling inside that rigid ring, the internal diameter drops from 4 mm to 2 mm (the radius drops by 50 percent from 2 mm to 1 mm). Because \(2^4 = 16\), cutting the airway radius in half reduces the breathing area by 75 percent and increases the work of breathing by 1,600 percent (16-fold).
  4. By contrast, a normal adult trachea has an internal diameter of roughly 20 millimeters (0.79 inches) (a radius of 10 mm). The exact same 1 millimeter of circumferential swelling reduces the adult diameter from 20 mm to 18 mm, which increases airway resistance by only about 50 percent (1.5-fold).
  5. Why Crying Makes the Airway Collapse (The Dynamic Bernoulli Effect): In children, the cartilage rings supporting the upper airway and larynx are soft and pliable. When a frightened child screams or cries and tries to suck air forcefully through a narrowed throat, the high velocity of air rushing past the swollen walls creates a strong negative vacuum pressure inside the airway lumen (the Venturi / Bernoulli effect). This negative pressure literally sucks the soft, floppy walls of the child's throat inward during inhalation, turning a partial obstruction into a near-total collapse. That is why keeping a child with stridor calm and quiet is not merely for comfort; it is a critical mechanical life-saving intervention.

The anatomical difference between Supraglottic and Subglottic swelling

  • Supraglottic Obstruction (Epiglottitis): Occurs above the vocal cords in loose, distensible connective tissue. Because the tissue covering the epiglottis and aryepiglottic folds is loosely attached, bacterial fluid and white blood cells rapidly balloon the epiglottis into a massive swollen sphere that flops over the laryngeal inlet during inspiration. It causes quiet, soft, low-pitched inspiratory stridor, a muffled "hot potato" voice, and drooling because the patient cannot swallow past the swollen mass, but no barking cough.
  • Subglottic Obstruction (Viral Croup): Occurs below the vocal cords inside the cricoid cartilage, the only cartilage in the entire human airway that forms a complete, rigid 360-degree signet ring. Because the cricoid ring cannot expand outward when the lining swells, all swelling is forced inward into the breathing tube, stretching the vocal cords above and producing a loud, brassy "barking seal" cough, a hoarse voice, and high-pitched, harsh inspiratory (or biphasic) stridor.

Deep dive: Acute Epiglottitis in children and adults

The changing face of Epiglottitis: Why adults are now at high risk

Before the routine introduction of the Haemophilus influenzae type b (Hib) conjugate vaccine in the late 1980s and 1990s, acute epiglottitis was predominantly a pediatric disease striking 2-to-7-year-old children. Today, two critical epidemiological realities must be understood by every family and first responder: 1. Pediatric Epiglottitis Still Occurs: It strikes children who are unimmunized or under-immunized against Hib, children in regions without universal Hib vaccination, and even fully vaccinated children when caused by other bacteria such as Streptococcus pneumoniae, Group A beta-hemolytic Streptococcus, or Staphylococcus aureus, or by thermal injury (drinking scalding liquids or inhaling steam). 2. Adult Supraglottitis / Epiglottitis is Rising: The majority of epiglottitis cases in vaccinated countries now occur in adults aged 20 to 65 years. Adult epiglottitis is frequently misdiagnosed at first as a "bad case of strep throat" because the adult throat looks deceptively normal when a doctor looks at the tonsils with a flashlight (since the epiglottis sits lower down, out of direct view).

The "Four Ds" of Acute Epiglottitis

Clinicians teach the classic Four Ds to recognize epiglottitis immediately at a glance without ever touching the patient: 1. Drooling (Sialorrhea): Saliva drips continuously from the chin because swallowing triggers agonizing throat pain and threatens to choke the airway. 2. Dysphagia and Severe Odynophagia: Complete inability to swallow liquids or solid food. In adults, the #1 hallmark of epiglottitis is severe, excruciating sore throat pain ("10 out of 10 pain") that is completely out of proportion to a normal-looking oral cavity and tonsils. 3. Dysphonia ("Hot Potato" Voice): The voice sounds thick, muffled, and hollow, as if the person is trying to speak while holding a scalding hot bite of potato in the back of their throat. 4. Distress (Inspiratory Stridor and Tripod Posture): The patient sits motionless, leaning forward with hands braced on their knees (tripod position), neck extended forward and chin tilted up (sniffing position), breathing slowly and carefully so as not to create turbulent airflow that sucks the swollen epiglottis shut.

Step-by-step first aid for suspected Epiglottitis

  1. Call 911 / 112 / 999 immediately and request an ALS paramedic crew. Tell the dispatcher: "I have a child/adult with suspected epiglottitis who is drooling, sitting in a tripod position, and struggling to breathe."
  2. Adopt a strict "Hands-Off, Calm-Environment" protocol:
  3. Dim harsh overhead lights and turn off loud televisions or barking pets.
  4. If the patient is a child, leave them in their parent's or caregiver's arms. Never try to pry an anxious toddler away from their mother or father to examine them.
  5. Let the patient hold a towel or cup near their chin to catch drool so they do not feel an urge to swallow it.
  6. Never lay the patient down and never look in the mouth: Do not ask the patient to "open wide and say ahh." Do not shine a phone light down their throat.
  7. If the patient loses consciousness and stops breathing completely before paramedics arrive:
  8. Se le vie aeree si chiudono completamente e il paziente diventa non responsivo, cianotico e in apnea, distenderlo delicatamente supino per iniziare RCP (o RCP pediatrica).
  9. Regola della respirazione di soccorso nell'arresto completo dell'epiglottide: Anche quando l'epiglottide gonfia blocca l'inalazione spontanea, respiri di soccorso lenti e decisi a pressione positiva (bocca a bocca o maschera con valvola a pallone del paramedico) possono spesso forzare piccoli sbuffi d'aria salvavita attraverso il tessuto gonfio nei polmoni mentre le compressioni toraciche fanno circolare l'ossigeno fino all'arrivo dei paramedici per eseguire un intervento chirurgico di emergenza delle vie aeree.

Approfondimento: groppa virale (laringotracheobronchite) e groppa spasmodica

Riconoscere la classica presentazione di mezzanotte di Croup

A differenza dell'epiglottite, il croup virale rappresenta la stragrande maggioranza dei casi di stridore acuto nei bambini di età compresa tra 6 mesi e 3 anni. * Perché la groppa attacca tra le 23:00 e le 4:00: Un bambino piccolo ha tipicamente un lieve naso che cola, una leggera raucedine e una lieve febbre durante il giorno. Nel cuore della notte, il bambino si sveglia ansimando con una forte, metallica, tosse a corteccia di foca e un suono rauco e gracchiante durante l'inspirazione (stridore inspiratorio). La groppa raggiunge il picco durante la notte perché il cortisolo endogeno (l'ormone antinfiammatorio naturale del corpo) scende al livello circadiano più basso tra mezzanotte e le 4:00 del mattino, mentre la posizione distesa sul letto aumenta l'accumulo di sangue venoso nel rivestimento sottoglottico. * Groppa spasmodica: una variante strettamente correlata in cui un bambino va a letto sano, senza febbre e si sveglia alle 2:00 del mattino con una tosse che abbaia e uno stridore dovuto all'improvviso edema della mucosa sottoglottica.

Valutazione della gravità della groppa: la guida alla gravità della groppa di Westley per genitori e soccorritori

Determinare se un bambino con tosse che abbaia può essere confortato con aria fresca e portato da un medico, o se necessita di un'ambulanza immediata del 911/112/999, dipende da se stridore e retrazioni del torace sono presenti quando il bambino è calmo e riposa:

Severity Level Stridor (High-Pitched Inhaling Sound) Chest Wall Retractions (Skin Sucking In) Air Entry, Mental State, and Skin Color Required Action
Mild Croup NO stridor when resting quietly; mild stridor may appear briefly only when the child cries, coughs, or gets upset None or barely visible flare at the bottom of the ribs when crying Normal air movement, alert, interactive, normal pink skin, able to drink sips of water Comfort child upright; use cool night air or cool mist; arrange same-day / urgent evaluation for single-dose oral Dexamethasone
Moderate Croup Audible stridor even when resting quietly and calm in parent's arms Visible mild-to-moderate retractions: skin sucks inward at the hollow of the neck (suprasternal notch) and between the ribs (intercostal) with every breath Slightly decreased air entry, anxious or restless, heart rate elevated, still alert Immediate Emergency Department evaluation for oral/IM corticosteroids and observation (call EMS if worsening or if child cannot calm down)
Severe Croup Loud, harsh inspiratory (or biphasic in-and-out) stridor at rest, OR stridor suddenly becomes faint/quiet because almost no air is moving Severe retractions: deep sucking-in above the breastbone, between every rib, and below the ribcage (subcostal), with nasal flaring or head bobbing Agitation, restlessness, or drowsiness/lethargy (sign of brain hypoxia); pale, mottled, or dusky skin LIFE-THREATENING: Call 911 / 112 / 999 immediately. Keep child sitting upright in parent's arms; paramedics will administer nebulized Epinephrine and Dexamethasone
Impending Respiratory Failure Silent chest / barely audible breath sounds, feeble cry, inability to cough effectively Exhausted, shallow breathing or paradoxical seesaw breathing (belly goes out while chest caves in) Lethargic, limp, unresponsive, or cyanotic (blue lips/tongue); slowing heart rate (bradycardia) Call 911 / 112 / 999. Prepare for immediate assisted ventilation and resuscitation

Safe home and prehospital first aid for Viral Croup

  1. Pick the child up and hold them upright immediately: Sitting upright reduces blood engorgement in the swollen subglottic mucosa and uses gravity to assist the diaphragm.
  2. Soothe and calm the child with quiet reassurance: Sing softly, read a favorite book, or put on a quiet video while holding the child on your lap. Stopping the child from crying immediately converts turbulent airflow back into smooth laminar airflow, often cutting their breathing effort in half within 2 minutes.
  3. Apply the Cool Night Air or Cool-Mist Bathroom Protocol (10 to 15 minutes):
  4. Option A (Cool Outdoor Night Air or Open Freezer Door): Wrap the child warmly in a blanket and carry them upright onto a porch, by an open window, or in front of an open refrigerator/freezer door to breathe cool, humid night air for 10 to 15 minutes. Cool air causes vasoconstriction of the dilated blood vessels in the subglottic lining, visibly shrinking the swelling and easing the barking cough.
  5. Option B (Cool-Mist Humidifier or Bathroom Mist): Run a clean cool-mist humidifier right beside the child, or sit upright with the child in a closed bathroom while running the shower to create a humid mist.
  6. AVVERTENZA DI USTIONE CRITICA: Mai tenere un bambino sopra una pentola di acqua bollente, un fornello caldo o un vaporizzatore a vapore caldo. I vaporizzatori a vapore caldo e le pentole di acqua bollente provocano ustioni catastrofiche al viso e alle vie respiratorie brucia nei bambini che si dimenano, e il vapore caldo può effettivamente aumentare il flusso sanguigno della mucosa e peggiorare l’edema delle vie aeree.
  7. Perché ogni bambino affetto da groppa dovrebbe essere valutato da un medico per i corticosteroidi:
  8. Even if cool night air stops a mild croup attack at 2:00 AM, viral subglottic inflammation lasts 3 to 5 days and frequently rebounds the following night.
  9. Le attuali linee guida pediatriche internazionali (American Academy of Pediatrics, UK NICE, Canadian Pediatric Society, OMS) raccomandano che tutti i bambini affetti da croup (anche lieve) ricevano una singola dose orale prescritta di un corticosteroide (tipicamente desametasone) da un medico o da una clinica di pronto soccorso. Una singola dose di desametasone inizia a ridurre il gonfiore delle vie aeree entro 2-4 ore, dura fino a 72 ore e riduce le visite di ritorno al pronto soccorso e i ricoveri in ospedale di oltre il 50%.

Understanding the 'Rebound Effect' after Nebulized Epinephrine

In moderate-to-severe croup, emergency paramedics or hospital physicians often administer nebulized racemic epinephrine (or L-epinephrine / adrenaline). Inhaled epinephrine constricts the microscopic blood vessels in the subglottic airway within 10 to 30 minutes, producing a dramatic, seemingly miraculous disappearance of stridor. However, nebulized epinephrine does not cure the underlying viral inflammation, and its vasoconstrictive effect wears off completely after 2 hours. When it wears off, the airway swelling can return just as severely as before (the "Epinephrine Rebound Phenomenon"). Any child who receives nebulized epinephrine (or who accidentally uses an asthma epinephrine inhaler) must be observed in a medical facility for at least 2 to 4 hours after the dose alongside long-acting corticosteroids.

Six fatal mistakes to avoid in upper airway emergencies

  1. Mistake 1: Trying to examine the throat with a spoon, finger, or flashlight. Never press down on the tongue or ask a drooling patient with stridor to open wide. In epiglottitis, minimal mechanical stimulation of the pharynx causes complete airway closure and vagal bradycardic arrest.
  2. Mistake 2: Giving oral liquids, honey, or fever medicine to a patient with resting stridor or drooling. Giving anything by mouth to a patient with upper airway obstruction risks aspiration, severe coughing spasms, and laryngospasm.
  3. Mistake 3: Performing abdominal thrusts (Heimlich maneuver) on a child with infectious croup or epiglottitis. Abdominal thrusts are designed exclusively to expel a solid mechanical foreign body. In epiglottitis or croup, the obstruction is swollen living tissue; abdominal thrusts cannot expel swollen tissue and only panic the child and collapse the airway faster.
  4. Mistake 4: Giving over-the-counter cough suppressants, antihistamines, or sedatives. Sedating a child or adult who is working hard to breathe through a narrowed airway removes their conscious respiratory drive and relaxes the pharyngeal muscles holding their throat open, precipitating rapid respiratory arrest. Antihistamines also dry out and thicken airway secretions in viral croup and bacterial tracheitis, causing thick mucus plugs to crust over the narrow windpipe.
  5. Mistake 5: Driving a child with severe stridor, drooling, or retractions to the hospital in the back seat of a private car. Always call 911 / 112 / 999 for an ALS ambulance when resting stridor, drooling, or retractions are present.
  6. Mistake 6: Confusing upper airway stridor with an asthma attack and forcing an inhaler into a crying toddler's mouth. Asthma causes expiratory wheezing (difficulty pushing air out of the lower lungs), whereas croup and epiglottitis cause inspiratory stridor (difficulty pulling air in past the upper throat). Standard blue salbutamol or albuterol asthma inhalers relax bronchial smooth muscle in the lower lungs; they have zero effect on swollen cartilage lining in the upper throat and can increase heart rate and agitation.

Upper airway emergencies demand calm action and knowing when to keep a patient undisturbed. Consider taking a certified first aid course through your national Red Cross or Red Crescent society, the American Heart Association, or St John Ambulance.

Domande frequenti

How can I tell the difference between a loud barking croup cough and deadly epiglottitis at 2:00 AM?

Look at three clues without touching the inside of the child's mouth: cough sound, saliva swallowing, and posture. A child with viral croup has a loud, brassy cough that sounds like a barking seal, a hoarse voice, and a low-grade fever, yet can still swallow saliva without drooling. By contrast, a child or adult with bacterial epiglottitis rarely has a barking cough; instead, they look very ill with a high fever, have a muffled 'hot potato' voice, sit upright leaning forward with their chin thrust out, and drool saliva because their throat is too swollen to swallow. Epiglottitis or any stridor heard at rest requires an immediate call to 911, 112, or 999.

Why is it so dangerous to look inside a child's mouth with a flashlight or spoon if they are drooling and breathing noisily?

In acute epiglottitis, the flap of tissue guarding the windpipe swells into a fragile, cherry-red ball that leaves only a tiny slit of space for air to enter the lungs. Pressing down on the tongue with a spoon, finger, or depressor, or forcing the child to open their mouth wide while crying, triggers an instant protective throat reflex called laryngospasm that slams the vocal cords shut, or pushes the swollen epiglottis downward like a cork into the opening of the windpipe. Once that swollen flap wedges into the windpipe, the child can no longer breathe. Even in the hospital, doctors do not look inside the throat of a child with suspected epiglottitis until an operating room team is ready to secure the airway.

Why does viral croup always seem to get much worse in the middle of the night?

Parents often notice that a child with croup seems almost recovered during the afternoon, only to wake up gasping with a loud barking cough between midnight and 4:00 AM the next night. This happens because the body's natural anti-inflammatory hormone, cortisol, follows a 24-hour circadian clock: cortisol levels peak in the morning (shrinking throat swelling during the day) and drop to their lowest point between midnight and 4:00 AM (allowing subglottic airway swelling to flare up again). Lying flat in bed also increases blood pooling in the windpipe lining. Holding the child upright, calming them, exposing them to cool night air, and having a doctor prescribe a single oral dose of dexamethasone prevents these nighttime flare-ups.

Can an adult get epiglottitis, and what does it feel like?

Yes. Because most children in developed countries receive the Hib vaccine, adults between 20 and 65 years old make up a large proportion of modern epiglottitis cases. In an adult, epiglottitis starts rapidly over 12 to 24 hours with a high fever and an excruciating sore throat that feels far worse than any normal cold or strep throat. Because the epiglottis sits deep below the base of the tongue, the visible tonsils often look completely normal in a mirror even though the patient is in severe pain, cannot swallow their own spit, begins drooling, speaks with a muffled voice, and must sit upright leaning forward to breathe. Any adult with a severe sore throat accompanied by drooling, muffled voice, or noisy breathing must call emergency medical services immediately and stay upright.

Fonti controllate

  • American Academy of Pediatrics (AAP, United States) & Pediatric Advanced Life Support (PALS / AHA): Recognition and Management of Upper Airway Obstruction, Viral Croup, Epiglottitis, and Bacterial Tracheitis.
  • National Institute for Health and Care Excellence (NICE, United Kingdom) & NHS: Clinical Knowledge Summary: Croup, Acute Epiglottitis, and Stridor Assessment in Children and Adults.
  • Canadian Paediatric Society (CPS, Canada): Acute Management of Croup in the Emergency Department and Prehospital Setting.
  • World Health Organization (WHO, International): Pocket Book of Hospital Care for Children: Stridor, Croup, and Epiglottitis.
  • Royal Children's Hospital Melbourne (RCH, Australia): Clinical Practice Guidelines: Acute Upper Airway Obstruction and Croup.

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