What is an example of a client's primary defense to infection?

Choice A reason: Once the tissue has necrosed from high pressure, it does not regenerate is the best explanation, because it describes the mechanism and outcome of glaucoma. Glaucoma is a condition that causes increased intraocular pressure, which damages the optic nerve and the retina, the tissues that are responsible for transmitting and processing visual information. Once these tissues are necrosed, or dead, they do not regenerate, or grow back, resulting in irreversible vision loss.

Choice B reason: Glaucoma always leads to permanent blindness is not a good explanation, because it is inaccurate and pessimistic. Glaucoma does not always lead to permanent blindness, but rather to progressive vision loss that can be prevented or slowed down with early diagnosis and treatment. Glaucoma can cause peripheral vision loss, tunnel vision, or blind spots, but not necessarily complete blindness.

Choice C reason: Once retinal detachment occurs, it does not return to its normal state is not a good explanation, because it is irrelevant and misleading. Retinal detachment is a condition that occurs when the retina separates from the underlying layer of blood vessels, which can cause vision loss or blindness. However, retinal detachment is not caused by glaucoma, nor is it a common complication of glaucoma. Retinal detachment can sometimes be repaired with surgery, depending on the extent and duration of the detachment.

Choice D reason: Once bacterial infection has caused damage, the tissue does not regenerate is not a good explanation, because it is incorrect and confusing. Bacterial infection is not a cause or a consequence of glaucoma, but rather a separate condition that can affect the eye. Bacterial infection can cause inflammation, pain, discharge, or redness in the eye, but not necessarily vision loss or tissue necrosis. Bacterial infection can usually be treated with antibiotics, which can prevent or reverse the damage.

Choice A reason: Shearing or friction is the force that caused the injury, because it occurs when the skin and underlying tissues move in opposite directions, such as when the client slides down in bed. Shearing or friction can damage the blood vessels and reduce blood flow to the skin, resulting in tissue ischemia, necrosis, and ulceration.

Choice B reason: Pressure or gravity is not the force that caused the injury, because it occurs when the skin and underlying tissues are compressed between a bony prominence and an external surface, such as when the client lies on his back. Pressure or gravity can impair blood flow and oxygen delivery to the skin, resulting in tissue damage and ulceration.

Choice C reason: Chemical or pressure is not the force that caused the injury, because it occurs when the skin is exposed to a substance that causes irritation, inflammation, or corrosion, such as when the client has a wound dressing that contains an antiseptic or a topical agent. Chemical or pressure can damage the skin barrier and increase the risk of infection and delayed wound healing.

Choice D reason: Twisting and bending is not the force that caused the injury, because it occurs when the skin and underlying tissues are stretched or distorted, such as when the client twists his ankle or bends his knee. Twisting and bending can cause sprains, strains, or tears of the ligaments, tendons, or muscles.