Laryngospasm: Causes, Symptoms, and Treatment

Overview

Laryngospasm is a sudden, involuntary contraction (spasm) of the vocal cords in the larynx (voice box). This spasm temporarily blocks the airway, making it difficult to speak or breathe. While laryngospasm can be frightening, it is usually brief and resolves on its own. However, severe or prolonged episodes require immediate medical attention.

Who It Affects: Laryngospasm can occur in people of all ages, but it is more common in infants and children due to their smaller airways. It may also affect adults, particularly those with certain medical conditions or risk factors.

Prevalence: Exact statistics on laryngospasm are limited, but it is a well-documented complication in medical settings, particularly during anesthesia or intubation. In infants, it may occur as part of conditions like laryngomalacia (softening of the laryngeal cartilage).

Symptoms

Laryngospasm symptoms can vary in intensity but often include:

• Difficulty breathing: A sudden inability to inhale or exhale properly, often accompanied by a feeling of suffocation.
• High-pitched noise: A wheezing or crowing sound (stridor) may be heard as air struggles to pass through the narrowed airway.
• Choking sensation: A feeling of something blocking the throat, even if nothing is physically present.
• Hoarse voice: Difficulty speaking or a raspy voice due to vocal cord spasms.
• Cyanosis: In severe cases, the skin, lips, or fingernails may turn blue due to lack of oxygen.
• Panicked feeling: Anxiety or fear due to the sudden inability to breathe.

Episodes typically last less than a minute but can feel much longer. If breathing does not resume quickly, it can become a medical emergency.

Causes and Risk Factors

Laryngospasm can be triggered by various factors, including:

Common Causes:

• Irritants: Inhaling smoke, dust, allergens, or chemical fumes.
• Acid reflux: Stomach acid irritating the vocal cords (laryngopharyngeal reflux or LPR).
• Anesthesia: A known complication during or after surgery, especially with intubation.
• Infections: Respiratory infections like croup or bronchitis.
• Allergic reactions: Severe allergic responses (anaphylaxis) can cause throat swelling and spasms.
• Exercise-induced: Intense physical activity, especially in cold or dry air.

Risk Factors:

• Infants and young children (due to smaller airways).
• People with GERD (gastroesophageal reflux disease).
• Individuals with a history of asthma or respiratory conditions.
• Those with anxiety or panic disorders (hyperventilation can trigger spasms).
• Patients undergoing general anesthesia.

Diagnosis

Diagnosing laryngospasm often relies on a physical exam and medical history. Since episodes are sudden and brief, doctors may ask about symptoms and potential triggers. Diagnostic steps may include:

• Medical history: Discussing past episodes, triggers, and associated conditions (e.g., reflux, asthma).
• Physical exam: Checking the throat, neck, and lungs for signs of obstruction or irritation.
• Laryngoscopy: A thin, flexible tube with a camera (laryngoscope) may be used to examine the vocal cords.
• Reflux testing: If GERD is suspected, tests like pH monitoring or an upper endoscopy may be recommended.
• Allergy testing: If allergies are a suspected trigger.

In some cases, laryngospasm may be diagnosed after ruling out other conditions like vocal cord dysfunction (VCD) or anaphylaxis.

Treatment Options

Treatment depends on the severity and underlying cause of the laryngospasm.

Immediate Actions During an Episode:

1. Stay calm: Panic can worsen the spasm. Focus on slow, controlled breathing.
2. Humidified air: Breathing in warm, moist air (e.g., from a shower or humidifier) may help relax the vocal cords.
3. Valsalva maneuver: Holding the nose, closing the mouth, and attempting to exhale gently to relieve pressure.
4. Seek fresh air: If irritants like smoke triggered the episode, move to a clean environment.

Medical Treatments:

• Oxygen therapy: In severe cases, supplemental oxygen may be administered.
• Medications:
  • For reflux-related laryngospasm: Antacids, H2 blockers (e.g., famotidine), or proton pump inhibitors (e.g., omeprazole).
  • For allergy-induced spasms: Antihistamines or epinephrine (in cases of anaphylaxis).
  • For anxiety-related episodes: Anti-anxiety medications or breathing exercises.
• Surgical intervention: Rarely, severe or recurrent laryngospasm may require procedures to address underlying issues (e.g., anti-reflux surgery).

Lifestyle and Home Remedies:

• Avoid known triggers (e.g., smoke, allergens).
• Manage reflux with dietary changes (e.g., avoiding spicy or acidic foods).
• Stay hydrated to keep the throat moist.
• Use a humidifier in dry environments.
• Practice relaxation techniques if anxiety is a trigger.

Living with Laryngospasm

If you experience recurrent laryngospasm, these strategies can help manage daily life:

• Carry a personal humidifier: Portable humidifiers can provide moist air on the go.
• Avoid triggers: Identify and steer clear of foods, environments, or activities that provoke episodes.
• Stay prepared: Keep a list of emergency contacts and medications (e.g., inhalers or epinephrine) if prescribed.
• Monitor symptoms: Track episodes to identify patterns or worsening trends.
• Seek support: Join support groups or consult a therapist if anxiety worsens symptoms.

Prevention

While not all cases of laryngospasm can be prevented, these steps may reduce risk:

• Manage reflux: Treat GERD with medications and lifestyle changes (e.g., eating smaller meals, avoiding lying down after eating).
• Avoid irritants: Limit exposure to smoke, strong fumes, and allergens.
• Stay hydrated: Drink plenty of water to keep the throat lubricated.
• Exercise caution with anesthesia: Inform your anesthesiologist if you have a history of laryngospasm.
• Control allergies: Work with an allergist to manage environmental or food allergies.

Complications

If left untreated or poorly managed, laryngospasm can lead to:

• Respiratory distress: Prolonged spasms can cause dangerously low oxygen levels.
• Secondary infections: Chronic irritation may increase susceptibility to throat or lung infections.
• Anxiety or panic disorders: Fear of recurrent episodes can lead to avoidance behaviors or heightened anxiety.
• Sleep disturbances: Nighttime episodes may disrupt sleep and lead to fatigue.

When to Seek Emergency Care

Sources and Further Reading

• Mayo Clinic
• Centers for Disease Control and Prevention (CDC)
• National Institutes of Health (NIH)
• World Health Organization (WHO)
• Cleveland Clinic