Laryngospasm and Vocal Cord Dysfunction (Inducible Laryngeal Obstruction): Inspiratory Stridor, Larson's Jaw-Thrust Maneuver, and the Panting Sniff Reset¶

Sudden, terrifying inability to pull air in past the throat can result from two closely related functional crises of the vocal cords: acute reflex laryngospasm (a violent, involuntary, complete or near-complete closure of the true and false vocal cords mediated by the superior laryngeal nerve) and vocal cord dysfunction (VCD), now officially classified by international respiratory societies as inducible laryngeal obstruction (ILO) (paradoxical adduction of the vocal cords toward the midline during inhalation rather than opening widely as they normally should). While complete laryngospasm is a life-threatening anesthetic, post-extubation, drowning, or acid-reflux airway emergency that can produce severe hypoxia, bradycardia, or negative-pressure pulmonary edema within 60 to 120 seconds if not physically broken, awake inducible laryngeal obstruction (VCD/ILO) is a benign, self-limiting functional spasm triggered by high-intensity exercise, acid reflux, cold air, strong chemical odors, post-nasal drip, or acute stress that is frequently misdiagnosed as life-threatening status asthmaticus or anaphylaxis. Because both conditions narrow the glottic chink at the level of the larynx in the neck, they produce a loud, high-pitched, musical or crowing sound when breathing IN (inspiratory stridor) with the patient pointing directly to their throat, in contrast to bronchial asthma, which narrows the lower airways inside the chest and causes whistling wheezing primarily when breathing OUT (expiratory wheezing). If someone develops sudden stridor, cannot speak or breathe, shows bluish lips (cyanosis), has neck or tongue swelling, or loses consciousness, call your local आपतकालीन नम्बरहरू तत्काल (संयुक्त राज्य अमेरिका र क्यानडामा 911, युरोपेली संघमा 112, युनाइटेड किंगडममा 999)। हाम्रो साथी गाइडहरू पनि समीक्षा गर्नुहोस् asthma attacks, epiglottitis, croup, and stridor, र allergic reactions and anaphylaxis।

Your immediate priority is to check for red-flag signs of true mechanical or anaphylactic airway obstruction (foreign body choking, lip or tongue angioedema, drooling, or declining consciousness), apply Larson's maneuver (firm bilateral inward and upward pressure at the laryngospasm notch right behind the earlobe combined with a forward jaw thrust) if acute complete laryngospasm strikes an unresponsive or post-sedation patient, and coach an awake patient through the Double Nasal Sniff and Pursed-Lip Exhale (or Panting Reset) to reflexively abduct (open) the vocal cords within seconds.

अब यो गर्नुहोस्¶

1. Check immediately for life-threatening red flags and call your local emergency number if present. Dial 911 in the United States and Canada, 112 across the European Union, 999 in the United Kingdom, 000 in Australia, or check our global directory of आपतकालीन नम्बरहरू if this is the person's first episode of stridor, if they were eating right before onset (choking), if they have hives or swollen lips or tongue (allergic reactions), if they have fever and drooling (epiglottitis), or if their lips turn blue or they become confused or unresponsive.
2. If an Awake Person Has Sudden Vocal Cord Spasm (VCD / ILO) or Post-Cough Paroxysmal Laryngospasm: Sit them upright with shoulders dropped forward and stop them from gasping through an open mouth. Gasping hard through an wide-open mouth creates high-velocity turbulent airflow across the larynx, which sucks the vocal cords tightly together via the Bernoulli vacuum effect and dries out the laryngeal mucosa.
3. Coach the "Double Nasal Sniff + Long Pursed-Lip Exhale" (EILOBI / Respiratory Retraining Reset):
4. Step A (Exhale First): Tell the person to blow their remaining air gently out through tightly pursed lips (as if blowing through a narrow coffee stirrer or flickering a candle flame without blowing it out) for 3 to 4 seconds. Breathing out against pursed lips creates 5 to 10 cmH2O of back-pressure (intrinsic PEEP) that pneumatically pushes the vocal cords apart.
5. Step B (The Nasal Sniff): Have them close their mouth, relax their jaw and throat, and take two quick, gentle sniffs IN through the nose (as if smelling a flower). Sniffing through the nose activates a powerful brainstem reflex via the posterior cricoarytenoid muscle (the sole abductor muscle of the larynx) that forces the vocal cords wide open.
6. Step C (The Panting / Straw Breath Alternative): If their nose is congested, have them pant rapidly like a dog with their tongue relaxed on the floor of the mouth, or inhale slowly through a narrow opening between pursed lips while expanding their belly (diaphragmatic breathing).
7. If Complete Silent Laryngospasm Strikes (Zero Airflow Despite Chest Heaving, or Post-Anesthesia / Post-Reflux / Drowning Spasm): Execute LARSON'S MANEUVER immediately.
8. Locate the Larson's point ( the "laryngospasm notch") on both sides of the head: the small bony depression bounded anteriorly by the ascending ramus (back edge) of the lower jawbone, posteriorly by the mastoid process behind the ear, and superiorly by the base of the skull, right behind the earlobe.
9. Place the tips of your middle or index fingers deep into both notches and press forcefully inward toward the center of the skull and forward/upward toward the nose simultaneously lifting the lower jaw into a strong forward jaw thrust.
10. Larson's maneuver mechanically stretches the geniohyoid and thyrohyoid ligaments to pull the epiglottis and false vocal cords apart while triggering intense cranial nerve stimulation that breaks the vagal laryngospasm reflex arc within 5 to 15 seconds.
11. If the Person Has Known Asthma as Well as Vocal Cord Dysfunction: Use their rescue salbutamol (albuterol) inhaler with a spacer if unsure, as up to 30 to 50 percent of VCD patients have coexisting asthma. However, understand that beta-2 agonist inhalers and epinephrine do not relax striated laryngeal muscle in pure vocal cord dysfunction, so breathing retraining must be performed alongside any inhaler use.
12. Take a small sip of room-temperature water (only once the person can draw a gentle breath and is not choking on food) or hum a low note ("Mmmmmm"). Both the pharyngeal swallowing reflex and low-pitch humming (phonation) reset disordered brainstem laryngeal motor signaling and relax hypertonic thyroarytenoid and lateral cricoarytenoid muscles.

Clinical decision tree: inspiratory stridor, VCD/ILO, and complete laryngospasm¶

flowchart TD
    A["Sudden onset of throat tightness, difficulty breathing IN, or high-pitched inspiratory stridor"] --> B{"Check Consciousness, Airflow, and Anaphylaxis / Foreign Body Signs"}
    B -->|Unconscious, cyanotic, silent chest with tracheal tug, or post-sedation/drowning| C["COMPLETE LARYNGOSPASM OR CHOKING: Call EMS (911/112/999); verify no foreign body; immediately perform LARSON'S MANEUVER + Jaw Thrust + 100% O2 positive pressure (CPAP 10 to 20 cmH2O)"]
    B -->|Swollen lips/tongue, generalized hives, hypotension, or exposure to allergen| D["ANAPHYLAXIS OR ANGIOEDEMA: Inject Intramuscular Epinephrine (0.3 to 0.5 mg) into outer mid-thigh immediately and call EMS"]
    B -->|Fever, drooling, tripod posture, muffled hot-potato voice, or barking cough| E["EPIGLOTTITIS OR CROUP: Keep patient calm and upright; do NOT inspect throat with spoon; call EMS immediately"]
    B -->|Awake, alert, no hives/swelling, pointing to throat; loud inspiratory stridor triggered by exercise, cough, reflux, scent, or stress| F["Inducible Laryngeal Obstruction (VCD / ILO) or Awake Paroxysmal Laryngospasm"]
    F --> G["Step 1: Sit upright leaning slightly forward; drop shoulders; relax jaw and neck muscles"]
    G --> H["Step 2: Exhale slowly through tightly PURSED LIPS for 4 seconds (creates positive back-pressure to push cords open)"]
    H --> I["Step 3: Take 2 gentle NASAL SNIFFS in through nose (or pant like a dog / breathe through a imaginary straw) using belly breathing"]
    I --> J{"Did stridor and throat tightness resolve within 1 to 3 minutes?"}
    J -->|Yes (Typical VCD / Awake Laryngospasm resolution)| K["Sip water slowly; avoid triggers (reflux, cold air, irritants); arrange outpatient laryngoscopy and Speech-Language Pathology (EILOBI) therapy"]
    J -->|No: Stridor persists > 3 to 5 minutes, SpO2 drops below 92%, or severe distress| L["Call EMS (911/112/999) for Emergency Department evaluation, flexible nasolaryngoscopy, CPAP, or Heliox (80:20 helium-oxygen)"]
    C --> M["Hospital / Anesthesia Escalation if Larson Maneuver + CPAP fail: IV Propofol (0.25 to 0.8 mg/kg) or IV Succinylcholine (0.1 to 1.0 mg/kg) + tracheal intubation"]

Pathophysiology: How the Larynx Works and Why the Vocal Cords Slam Shut¶

The human larynx (voice box) serves three critical biological functions: maintaining an open airway for breathing, producing voice (phonation), and acting as a protective sphincter valve to prevent food, liquid, and stomach acid from entering the lungs during swallowing.

Normal Vocal Cord Movement vs Paradoxical Adduction (ILO) vs Complete Laryngospasm¶

1. Normal Respiration:
2. During Inhalation (Breathing In): The respiratory center in the medulla oblongata fires signals down the recurrent laryngeal nerve to contract the posterior cricoarytenoid (PCA) muscle, the only muscle in the entire human body that opens (abducts) the vocal cords. The vocal cords swing wide apart into a broad V-shape, allowing silent, laminar airflow into the trachea.
3. During Exhalation (Breathing Out): The vocal cords relax slightly toward the midline (narrowing by 10 to 30 percent) to maintain mild physiological positive end-expiratory pressure.
4. Inducible Laryngeal Obstruction (Vocal Cord Dysfunction / VCD):
5. In patients with VCD / ILO (including Exercise-Induced Laryngeal Obstruction [EILO] in competitive athletes), chronic irritation of the laryngeal mucosa (from silent laryngopharyngeal acid reflux, post-nasal drip, or inhaled irritants) or autonomic hyper-reactivity causes the adductor muscles (lateral cricoarytenoid, thyroarytenoid, and interarytenoid muscles) to contract paradoxically during inhalation (or causes the aryepiglottic folds above the cords to prolapse inward during peak exercise).
6. Instead of opening into a wide V when the person breathes in, the anterior two-thirds of the vocal cords slam together toward the midline, leaving only a tiny posterior diamond-shaped chink at the back of the glottis through which air whistles with a high-pitched inspiratory stridor.
7. Acute Complete Reflex Laryngospasm:
8. Mediated via the internal branch of the superior laryngeal nerve (a branch of the Vagus Nerve, CN X), complete laryngospasm is an exaggerated, primitive brain-stem protective reflex designed to keep water or vomit out of the lungs.
9. When a droplet of microscopic stomach acid (laryngopharyngeal reflux / LPR), thick post-nasal mucus, blood, water (during swimming or drowning), or a violent coughing fit (such as Bordetella pertussis whooping cough or post-viral vagal neuropathy) hits the hypersensitive laryngeal vestibule, the true vocal cords, false vocal cords (vestibular folds), and aryepiglottic folds all contract into a sustained tetanic spasm simultaneously.
10. Unlike normal swallowing closure (which lasts 0.5 seconds), reflex laryngospasm locks the glottis shut for 15 to 90 seconds even after the irritant is gone.

Side-by-side comparison: Vocal Cord Dysfunction (ILO) vs Asthma Attack vs Anaphylaxis vs Foreign Body Choking¶

Because up to 40 percent of patients with Vocal Cord Dysfunction are misdiagnosed for years as having "refractory brittle asthma", sometimes receiving unnecessary high-dose oral corticosteroids, intramuscular epinephrine injections, or even emergency endotracheal intubation, every emergency responder and patient should know these classic distinguishing features:

Detailed step-by-step guide to Larson's Maneuver (The Laryngospasm Notch Technique)¶

Described by anesthesiologist Dr. C. Philip Larson Jr. and honed over four decades of clinical practice, Larson's maneuver is the single most effective non-pharmacological physical maneuver to break acute complete or severe partial laryngospasm (whether occurring after general anesthesia extubation, during procedural sedation with ketamine, during a drowning rescue, or during a severe awake paroxysmal laryngospasm attack where the patient cannot inhale at all).

Anatomical Landmarks of the Laryngospasm Notch (Larson's Point)¶

On both sides of the head, immediately behind the earlobes, sits a deep pyramidal depression called the laryngospasm notch: - Anterior Boundary (Front Wall): The posterior border of the ascending ramus and condyle of the mandible (lower jawbone). - Posterior Boundary (Back Wall): The anterior border of the bony mastoid process of the temporal bone behind the ear. - Superior Boundary (Roof): The base of the skull right below the external auditory canal (ear canal) and styloid process. - What Lies Deep Inside the Notch: The stylohyoid ligament, the trunk of the facial nerve (CN VII), branches of the glossopharyngeal (CN IX) and vagus (CN X) nerves, and the parotid fascia.

How to Execute Larson's Maneuver in 4 Steps¶

1. Position Yourself Behind or Facing the Patient: Stand at the head of the bed (if the patient is lying down) or directly behind/beside the seated patient.
2. Place Your Middle or Index Fingers Deep into Both Laryngospasm Notches: Slide the pads of both middle fingers (or index fingers) directly behind the earlobes into the soft triangular hollow between the back edge of the jawbone and the mastoid bone, right at the very top of the jaw near the ear canal.
3. Press Forcefully Inward (Medially) Toward the Center of the Skull: Apply firm, deep inward pressure toward the opposite ear. This generates a strong, sharp periosteal stimulus over the styloid process and cranial nerve branches.
4. Simultaneously Pull Forward and Upward (Anterior-Cephalad Jaw Thrust) Toward the Nose: While pressing inward into the notch, hook your fingers behind the angle/ramus of the mandible and lift the entire lower jaw forcefully forward (lifting the lower teeth in front of the upper teeth).

Why Larson's Maneuver Works (Dual Mechanical and Neurological Mechanism)¶

• Mechanical Supraglottic Unfolding: Pulling the mandible forcefully forward stretches the geniohyoid, mylohyoid, and thyrohyoid muscles and the hyoepiglottic ligament, pulling the hyoid bone and tongue base anteriorly. This physically unfolds the buckled aryepiglottic folds and pulls the false vocal cords away from the true vocal cords.
• Central Autonomic / Vagal Reflex Interruption: The intense deep pressure inside the laryngospasm notch stimulates somatic afferent fibers of the trigeminal (CN V), facial (CN VII), and glossopharyngeal (CN IX) nerves, sending an overriding central impulse to the nucleus tractus solitarius and nucleus ambiguus in the brainstem that inhibits the hyperactive superior laryngeal nerve motor arc, causing the vocal cords to relax and swing open within 5 to 15 seconds (often accompanied by an audible sigh or swallow).

Detailed step-by-step guide to Awake Vocal Cord Reset Breathing (Sniffing, Panting, and EILOBI)¶

When a teenager, athlete, or adult is wide awake and experiencing an acute episode of Vocal Cord Dysfunction (ILO) or post-cough / post-reflux paroxysmal laryngospasm (manifesting as terrifying throat tightness and loud high-pitched inspiratory stridor), do not inflict painful pressure unless complete silent obstruction occurs. Instead, guide them through these evidence-based Speech-Language Pathology (SLP) laryngeal rescue techniques:

Technique 1: The Nasal Sniff + Pursed-Lip Exhale ("Sniff-Sniff-Blow")¶

1. Posture Reset: Sit the person upright on the edge of a chair, have them rest their forearms on their thighs (tripod or relaxed forward lean), drop their shoulders away from their ears, and unclench their teeth.
2. Exhale First Through Pursed Lips: Instruct them: "Don't try to suck air in right now. Pucker your lips like you are whistling and blow the air you have out slowly for 4 seconds: Sssssss or Fffffff." This positive expiratory pressure pushes the adducted vocal cords apart from below.
3. Double Nasal Sniff In: Instruct them: "Keep your mouth closed and take two quick, light sniffs in through your nose, like sniffing a rose: Sniff, sniff." Nasal sniffing maximally recruits the posterior cricoarytenoid muscle, forcing the vocal cords into wide abduction.
4. Repeat for 5 to 10 Cycles: Within 3 to 5 breaths, the high-pitched stridor softens and disappears.

Technique 2: The Panting Reset (When the Nose Is Blocked)¶

If the person has nasal congestion or cannot sniff through their nose: 1. Have them open their mouth slightly and rest their tongue flat and wide on the floor of the mouth behind the lower front teeth. 2. Have them pant rapidly and shallowly like a hot dog (2 to 3 shallow pants per second) for 5 to 10 seconds, followed by a slow pursed-lip exhale. 3. Panting continuously stimulates the brainstem respiratory rhythm generator to keep the posterior cricoarytenoid muscle contracted, preventing the vocal cords from slamming shut mid-breath.

Technique 3: EILOBI Breathing (Exercise-Induced Laryngeal Obstruction Biphasic Inspiration) for Athletes¶

Developed specifically by Scandinavian and international sports medicine laryngologists for competitive runners, swimmers, cyclists, and rowers who develop supraglottic or glottic closure at maximum exertion (EILO): 1. While continuing or slowing their stride, the athlete inhales initially through lightly adducted teeth or pursed lips (creating slight oral resistance) for the first half of inhalation, then smoothly opens the mouth while expanding the lower ribcage and abdomen (diaphragmatic excursion) without lifting the clavicles or tensing the anterior neck strap muscles. 2. Why it works: Creating slight oral resistance at the lips shifts the pressure drop forward to the mouth instead of at the larynx, eliminating the negative Bernoulli suction across the aryepiglottic folds and vocal cords.

Sleep-Related and Reflux-Induced Paroxysmal Laryngospasm (Waking Up Gasping at Night)¶

One of the most frightening human experiences is sleep-related laryngospasm: a person wakes up bolted upright from deep sleep in the middle of the night completely unable to inhale a single drop of air, making a desperate high-pitched crowing sound (or total silence) for 15 to 45 seconds and feeling certain they are about to die, before the throat finally pops open with a loud gasp.

• Primary Cause (Silent Laryngopharyngeal Reflux / LPR): When lying flat at night, a tiny micro-droplet of gastric acid and pepsin travels up the esophagus past the upper esophageal sphincter and drips onto the posterior larynx (the interarytenoid notch). Unlike the esophagus (which can tolerate brief acid exposure), the laryngeal mucosa has almost zero carbonic anhydrase defense; a single drop of acid triggers an immediate, violent chemoreflex laryngospasm to protect the lungs.
• How to Break a Nighttime Reflux Laryngospasm Attack:
• Stand up or sit bolt upright immediately (stops further acid reflux).
• Suppress the urge to gasp violently through an open mouth; immediately blow out through pursed lips and take tiny nasal sniffs.
• As soon as a tiny trickle of air passes, take one small sip of water kept on the nightstand and swallow. The mechanical act of swallowing triggers a brainstem reset that immediately unlocks the laryngeal sphincter.
• How to Prevent Nighttime Attacks: Stop all food and liquids at least 3 hours before bedtime, elevate the head of the bed by 15 to 20 centimeters (6 to 8 inches) or sleep on an inclined wedge pillow (sleeping on the left side keeps the gastroesophageal junction above the pool of stomach acid), and consult an ENT or gastroenterologist for proton pump inhibitor (PPI) and alginate raft therapy.

Hospital and Anesthesia Management of Refractory Laryngospasm¶

In the hospital emergency department, intensive care unit, or operating room (such as after pediatric tonsillectomy, upper endoscopy, or ketamine procedural sedation), if complete laryngospasm does not break within 15 to 30 seconds of Larson's maneuver + chin lift, clinicians execute a rapid escalation protocol before hypoxia or negative-pressure pulmonary edema (NPPE) develops:

1. Remove the Irritant Stimulus: Gently suction blood, saliva, or secretions from the hypopharynx above the vocal cords and remove any supraglottic airway device or oral airway that is tickling the glottis.
2. 100% Oxygen Continuous Positive Airway Pressure (CPAP 10 to 20 cmH2O) with Tight Two-Handed Mask Seal: Combine Larson's maneuver with a two-handed C-E mask grip delivering 100% oxygen with 10 to 20 cmH2O of continuous positive airway pressure (CPAP) via a Mapleson circuit or anesthesia bag. Avoid violent high-pressure squeezing of the bag if the cords are completely locked, as pressures above 25 cmH2O force air down the esophagus into the stomach (gastric insufflation), pushing up on the diaphragm.
3. Sub-Hypnotic Intravenous Propofol (First-Line Pharmacological Breaker): Administer a small intravenous bolus of Propofol (0.25 to 0.8 mg/kg IV). Deepening sedation with low-dose propofol breaks 75 to 85 percent of refractory post-extubation or sedation laryngospasms within 15 seconds without requiring paralysis or re-intubation.
4. Intravenous or Intramuscular Succinylcholine (Gold-Standard Neuromuscular Blockade): If hypoxia worsens (SpO2 dropping below 85%) or bradycardia develops despite propofol and Larson's maneuver:
5. Low-Dose IV Succinylcholine: 0.1 to 0.25 mg/kg IV immediately relaxes the striated vocal cord muscles within 20 to 30 seconds while often preserving spontaneous diaphragm breathing.
6. Full-Dose IV Succinylcholine (1.0 to 2.0 mg/kg IV) or IM Succinylcholine (4.0 mg/kg IM into the deltoid or quadriceps if no IV line is present): Completely paralyzes the vocal cords for emergency ventilation and endotracheal intubation, paired with IV Atropine (0.02 mg/kg) in young children to prevent severe hypoxic/succinylcholine-induced bradycardia.
7. ** हेलियोक्स (८०% हेलियम / २०% अक्सिजन) गम्भीर अवेक रिफ्रेक्टरी स्ट्रिडरका लागि: ** आपतकालीन विभागमा, गम्भीर लगातार ब्यूँझने माथिल्लो वायुमार्गको स्ट्रिडर भएका बिरामीहरूले **हेलियोक्स (८०:२० वा ७०:३०) लाई द्रुत रूपमा प्रतिक्रिया दिन्छन् किनभने एक-एक हेलियम-अक्सिजनको मिश्रण हुन्छ। नाइट्रोजन, लोअर रेनोल्ड्स नम्बरहरू, र बर्नौली सक्शन चक्र तोड्दा टर्ब्युलन्ट ग्लोटिक वायुप्रवाहलाई सहज लामिनार प्रवाह मा रूपान्तरण गर्दछ।

क्षेत्रीय आपतकालीन नम्बरहरू र क्लिनिकल दिशानिर्देशहरू¶

• United States and Canada: Call 911 for any first-time stridor, cyanosis, anaphylaxis, or unresponsive laryngospasm. Follow American Thoracic Society (ATS), American College of Chest Physicians (CHEST), and American Academy of Otolaryngology-Head and Neck Surgery (AAO-HNS) guidelines for flexible laryngoscopy confirmation of Inducible Laryngeal Obstruction (ILO) and respiratory retraining therapy.
• United Kingdom: Call 999 for acute stridor with respiratory distress or cyanosis. The ** European Respiratory Society (ERS) / European Laryngological Society (ELS) / Royal Brompton Hospital** consensus guidelines define Inducible Laryngeal Obstruction (ILO) and Exercise-Induced Laryngeal Obstruction (EILO) and recommend continuous laryngoscopy during exercise (CLE) testing and specialist speech and language therapy.
• European Union: Call 112 across all EU member states. Follow the joint ERS / ELS / ACCP Task Force Consensus Statement on Nomenclature and Diagnosis of Inducible Laryngeal Obstructions.
• Australia and New Zealand: Call 000 in Australia or 111 in New Zealand. Follow Thoracic Society of Australia and New Zealand (TSANZ) and Australian and New Zealand College of Anaesthetists (ANZCA) laryngospasm crisis management algorithms.

बारम्बार सोधिने प्रश्नहरू¶

How can I tell the difference between Vocal Cord Dysfunction (VCD / ILO) and an asthma attack?¶

The clearest difference is whether it is harder to breathe IN or OUT, and where the sound comes from: in Vocal Cord Dysfunction (inducible laryngeal obstruction), the vocal cords in your neck close paradoxically when you inhale, making it feel like air hits a wall at your throat with a high-pitched crowing sound (stridor) on inhalation, and episodes start and stop within minutes while oxygen levels stay normal. In an asthma attack, the small bronchial tubes deep inside your chest narrow, making it hardest to breathe air OUT with whistling expiratory wheezing in the chest that requires a bronchodilator inhaler (salbutamol/albuterol) and takes hours to resolve.

What is Larson's maneuver and where is the laryngospasm notch located?¶

Larson's maneuver is an emergency physical technique used to break severe or complete laryngospasm. The laryngospasm notch (Larson's point) is the small triangle-shaped indentation directly behind both earlobes, located between the back edge of the lower jawbone (mandibular ramus) in front, the mastoid bone behind the ear in back, and the base of the skull on top. Pressing firmly inward toward the center of the head with your middle fingers deep in both notches while simultaneously pulling the lower jawbone forcefully forward and upward (a jaw thrust) stretches the laryngeal tissues open and triggers a cranial nerve reflex that relaxes vocal cord spasm within seconds.

Why does sniffing through your nose and breathing out through pursed lips stop a vocal cord spasm?¶

When your vocal cords spasm partway shut, gasping hard through an open mouth creates a high-speed vacuum (the Bernoulli effect) that sucks the vocal cords even tighter together. Blowing air out slowly through tightly pursed lips creates gentle positive back-pressure from below that pushes the vocal cords apart, while taking two gentle sniffs in through the nose activates a built-in brainstem reflex that fires the posterior cricoarytenoid muscle, the only muscle in the body that pulls the vocal cords wide open.

Why do I sometimes wake up in the middle of the night gasping for air with my throat locked shut?¶

Waking up suddenly from sleep unable to pull air in for 15 to 45 seconds with a high-pitched stridor sound is classic sleep-related reflux laryngospasm. When you lie flat, a microscopic droplet of stomach acid and digestive enzyme (laryngopharyngeal reflux) can travel up your esophagus and touch your vocal cords, triggering an immediate protective reflex that slams the voice box shut to keep acid out of your lungs. Sitting bolt upright, blowing out through pursed lips, sniffing gently through your nose, and taking a small sip of water resets the reflex within seconds.

स्रोत र आधिकारिक निर्देशन¶

• European Respiratory Society (ERS), European Laryngological Society (ELS), and American College of Chest Physicians (ACCP): International Consensus Statement on Nomenclature, Diagnosis, and Management of Inducible Laryngeal Obstructions (ILO and EILO).
• Larson CP Jr. (Anesthesiology / Clinical Airway Management): Laryngospasm: The Best Treatment (Foundational Description of the Laryngospasm Notch and Larson's Jaw-Thrust Maneuver).
• American Thoracic Society (ATS) and American Academy of Allergy, Asthma, and Immunology (AAAAI): Clinical Differentiation and Co-Management of Vocal Cord Dysfunction (Paradoxical Vocal Fold Motion) and Asthma.
• Association of Anaesthetists (United Kingdom) and Australian and New Zealand College of Anaesthetists (ANZCA): Perioperative Laryngospasm Crisis Management Algorithm (CPAP, Larson's Maneuver, Propofol, and Succinylcholine).
• Royal College of Speech and Language Therapists (RCSLT) and American Speech-Language-Hearing Association (ASHA): Respiratory Retraining and EILOBI Therapy for Inducible Laryngeal Obstruction.

सम्बन्धित गाइडहरू¶

• Asthma attack emergency treatment and inhaler spacer technique
• Epiglottitis, croup, stridor, and acute upper airway obstruction
• Negative-pressure pulmonary edema (NPPE) after relieving choking or laryngospasm
• Allergic reactions and anaphylaxis first aid
• देश अनुसार आपतकालीन नम्बरहरू