A nurse is assessing a client’s cranial nerves. What cranial nerve would be assessed when checking a client’s gag reflex?

CN IX

CN V

CN X

CN XII

Answer and Explanation

The Correct Answer is A

Choice A reason: The glossopharyngeal nerve (CN IX) is primarily responsible for the gag reflex. It provides sensory input from the pharynx and posterior third of the tongue, which triggers the gag reflex when stimulated. This nerve plays a crucial role in swallowing and the reflexive action to prevent choking.

Choice B reason: The trigeminal nerve (CN V) is responsible for facial sensation and motor functions such as biting and chewing. It does not play a direct role in the gag reflex. While it is important for other sensory and motor functions, it is not involved in the reflex being assessed here.

Choice C reason: The vagus nerve (CN X) also contributes to the gag reflex by providing motor innervation to the muscles of the pharynx and larynx. However, the primary sensory input for the gag reflex comes from the glossopharyngeal nerve (CN IX). The vagus nerve works in conjunction with CN IX to complete the reflex action.

Choice D reason: The hypoglossal nerve (CN XII) controls the movements of the tongue. It is essential for speech and swallowing but does not have a role in the gag reflex. The hypoglossal nerve’s primary function is motor control of the tongue muscles.

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Correct Answer is A

Explanation

Choice A Reason:

Keep the drainage system below the level of the client’s chest at all times is correct. This measure ensures that gravity assists in the drainage of air and fluid from the pleural space, preventing backflow into the chest cavity. Keeping the drainage system below chest level maintains the negative pressure needed for effective drainage.

Choice B Reason:

Clamp the chest tube prior to transferring the client to a wheelchair is incorrect. Clamping the chest tube can lead to a buildup of air or fluid in the pleural space, potentially causing a tension pneumothorax. The chest tube should remain unclamped to allow continuous drainage.

Choice C Reason:

Empty the collection chamber prior to transport is incorrect. While it is important to monitor and manage the drainage, emptying the collection chamber is not necessary before transport. The focus should be on maintaining the integrity and function of the drainage system.

Choice D Reason:

Disconnect the chest tube from the drainage system during transport is incorrect. Disconnecting the chest tube can lead to a loss of the negative pressure system, resulting in potential complications such as pneumothorax. The chest tube should remain connected to ensure continuous drainage and maintain the negative pressure.

A. Secure the oxygen tubing to the bed sheet near the client’s head. B. Attach a humidifier bottle to the base of the flow meter. C. Apply petroleum jelly to the nares as needed to soothe mucous membranes. D. Remove the nasal cannula while the client eats.

Correct Answer is B

Explanation

Choice A Reason:

Securing the oxygen tubing to the bed sheet near the client’s head is not recommended because it can lead to accidental dislodgement of the tubing, which can interrupt the oxygen supply. Additionally, this practice does not address the potential for nasal dryness and irritation that can occur with oxygen therapy. Properly securing the tubing should involve ensuring it is comfortably positioned and not at risk of being pulled or dislodged.

Choice B Reason:

Attaching a humidifier bottle to the base of the flow meter is the correct action because it helps to add moisture to the oxygen being delivered to the client. Oxygen therapy, especially at higher flow rates like 5 L/min, can dry out the nasal passages and mucous membranes, leading to discomfort and potential complications. The humidifier bottle ensures that the oxygen is humidified, which helps to prevent dryness and irritation, making the therapy more comfortable and effective for the client.

Choice C Reason:

Applying petroleum jelly to the nares is not recommended because petroleum-based products can be flammable and pose a risk when used in conjunction with oxygen therapy. Additionally, petroleum jelly can trap bacteria and potentially lead to infections. Instead, water-based lubricants or saline nasal sprays are safer alternatives for soothing dry nasal passages.

Choice D Reason:

Removing the nasal cannula while the client eats is not advisable because it interrupts the continuous delivery of oxygen, which is essential for clients with pneumonia who may already have compromised respiratory function. Instead, the nurse should ensure that the nasal cannula is securely in place and that the client is receiving the prescribed oxygen therapy at all times, including during meals.

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A nurse is assessing a client’s cranial nerves. What cranial nerve would be assessed when checking a client’s gag reflex?

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Correct Answer is A

Explanation

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Correct Answer is B

Explanation

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