**Question:** Nasal intubation is contraindicated in –

A. Obstructive sleep apnea
B. Cervical spine injury
C. Nasal trauma or deformity
D. Uncontrolled epistaxis

**Core Concept:**
Nasal intubation is a procedure where an endotracheal tube is inserted through the nose and into the trachea to secure the airway during surgery or critical care. Contraindications are situations where the procedure should be avoided due to potential harm or complications.

**Why the Correct Answer is Right:**
Nasal intubation is contraindicated in D (uncontrolled epistaxis) due to the risk of bleeding, which may obstruct the airway or lead to a life-threatening situation. In uncontrolled epistaxis, the nose is already in a compromised state, and nasal intubation may exacerbate the bleeding and make airway management more challenging.

**Why Each Wrong Option is Incorrect:**
In A (obstructive sleep apnea), nasal intubation may pose a risk if the patient's airway is already compromised due to collapsing airways during sleep. However, this option is less categorical compared to D, as obstructive sleep apnea can be managed safely with nasal intubation under proper conditions.

In B (cervical spine injury), nasal intubation may cause trauma to the delicate structures of the neck, further compromising the patient's airway and potentially worsening the cervical spine injury. The correct procedure for airway management in a patient with a cervical spine injury is a different technique called "cervical spine precautions."

In C (nasal trauma or deformity), nasal intubation can lead to injury and further compromise the patient's airway. In cases of nasal trauma or deformity, alternative airway management techniques should be considered.

**Correct Answer:** D (uncontrolled epistaxis)

**Clinical Pearl:**

When nasal intubation is considered for a patient with uncontrolled epistaxis, it is essential to ensure a stable airway condition and appropriate stabilization of the patient. In cases of severe epistaxis, nasal packing or other non-intubation methods should be employed to control the bleeding and establish a stable airway, before proceeding with intubation.