The practical nurse (PN) is caring for a client with a new prescription for fluticasone furoate nasal spray, a glucocorticoid prescribed for the client's nasal allergy symptoms.

In reinforcing instructions about self-administration of the nasal spray, the PN should emphasize the need for the client to take which action before self-administration?

Glaucoma is a group of eye diseases that damage the optic nerve and cause vision loss. It is often associated with increased intraocular pressure, which can compress the nerve fibers and reduce blood flow to the retina. The most common type of glaucoma, open-angle glaucoma, causes gradual loss of peripheral vision.

The other options are not correct because:

1. Macular edema is a condition that causes swelling and fluid accumulation in the macula, the central part of the retina that is responsible for sharp and detailed vision. It can cause blurred or distorted vision, but it does not affect the optic nerve or the peripheral vision.
2. Cataract is a condition that causes clouding of the lens, which is the transparent structure that focuses light onto the retina. It can cause blurred, dim, or yellowed vision, but it does not affect the optic nerve or the intraocular pressure.
3. Diabetic retinopathy is a complication of diabetes that damages the blood vessels in the retina and causes bleeding, leakage, or scarring. It can cause blurred, fluctuating, or darkened vision, but it does not affect the optic nerve or the intraocular pressure.
4. 

The correct answer is Choice C. Following abdominal surgery, a client experiences wound evisceration.

Choice A rationale:

Cellulitis developing around a foot wound in a client with diabetes mellitus (DM) is a concerning situation, but it does not require the most immediate intervention compared to wound evisceration. Cellulitis is a bacterial skin infection that can usually be treated with antibiotics, while wound evisceration is a surgical emergency.

Choice B rationale:

Following suture removal from a stab wound, wound dehiscence is a serious complication, but it is not as immediately life-threatening as wound evisceration. Wound dehiscence is the separation of the wound edges after closure, and while it requires prompt attention, it does not involve the protrusion of organs from the wound.

Choice C rationale:

Wound evisceration, the protrusion of organs through a surgical incision, is a life-threatening complication that requires immediate intervention. The practical nurse should cover the exposed organs with a sterile, moist dressing and seek immediate medical assistance to prevent infection and further complications.

Choice D rationale:

For a client with a stage 4 sacral pressure ulcer developing purulent drainage is a concern, but it is not as immediately critical as wound evisceration. Proper wound care and infection management are essential, but the urgency level is lower compared to wound evisceration.