**Question:** A patient presented with stridor and dyspnoea which he developed after an attack of upper respiratory tract infection. On examination he was found to have a 3-mm glottic opening. All of the following are used in the management except:

A. Laryngeal mask airway (LMA)
B. Intubation
C. Oxygen therapy
D. Intravenous antibiotics

**Correct Answer:** D. Intravenous antibiotics

**Core Concept:**

Stridor and dyspnoea in a patient with a history of upper respiratory tract infection can be explained by a condition known as laryngotracheobronchitis (LTB), also known as epiglottitis. This is a potentially life-threatening condition characterized by inflammation of the larynx and trachea, narrowing the airway and leading to stridor and dyspnoea. Inadequate antibiotic treatment, such as oral antibiotics, would not address the severity of the condition and may lead to complications like respiratory failure, sepsis, and even death.

**Why the Correct Answer is Right:**

The correct answer, **Intravenous antibiotics**, is crucial in the management of LTB as it ensures rapid systemic absorption and delivery of the antibiotic directly into the bloodstream. Oral antibiotics may not achieve adequate concentration in the affected area due to limited bioavailability and first-pass effect of the liver. Intravenous administration bypasses these limitations, ensuring a higher concentration of the antibiotic at the site of infection, thus improving the chances of successful treatment.

**Why Each Wrong Option is Incorrect:**

A. **Laryngeal mask airway (LMA)** is a device used for airway management during general anesthesia or for ventilation purposes. It is not a treatment for LTB and is not relevant to the management of this life-threatening airway obstruction.

B. **Intubation** involves inserting a tube into the trachea to secure the airway. Although intubation is essential in severe cases of LTB, oral antibiotics are not sufficient to treat the infection. Therefore, intubation should be considered after antibiotic treatment, not a substitute for it.

C. **Oxygen therapy** is supportive treatment in respiratory distress due to LTB, increasing the partial pressure of oxygen in the blood. While this can alleviate some symptoms, it is not a treatment for the infection itself and does not address the airway obstruction caused by LTB.

**Clinical Pearl:**

In cases of severe LTB, early recognition and treatment are crucial to prevent complications and save the patient's life. Intravenous antibiotics are essential to treat the infection, while airway management techniques (intubation and LMA) are used to secure the airway and provide oxygenation to the patient. Oxygen therapy alone is supportive treatment and may not address the airway obstruction caused by LTB.