A client has a patch test performed with the following results. Which of the following is the best response the nurse will offer the client regarding the observations from the test?

Choice A Reason: Depth perception is the ability to judge the distance and position of objects in three-dimensional space. Depth perception is assessed by asking the client to touch the tip of a pen or pencil held by the nurse, or by using a stereopsis test.

Choice B Reason: Peripheral vision is the ability to see objects and movements outside the direct line of vision. Peripheral vision is assessed by asking the client to shake the hand of the nurse, who stands at an angle to the client's side, or by using a confrontation test.

Choice C Reason: Color deficit is the inability to distinguish certain colors or shades of colors. Color deficit is assessed by asking the client to identify numbers or shapes on a color plate test, such as the Ishihara test.

Choice D Reason: Double vision is the perception of two images of a single object. Double vision is assessed by asking the client to cover one eye and look at an object, then switch eyes and compare the images, or by using a cover-uncover test.

Choice A Reason: This is incorrect because administering medications and electrolytes is not the primary purpose of inserting a nasogastric tube for a client with acute peritonitis. Medications and electrolytes can be given through other routes, such as IV or oral.

Choice B Reason: This is incorrect because dilating the stomach as a presurgical preparation is not a relevant Reason for inserting a nasogastric tube for a client with acute peritonitis. Dilating the stomach may be done before some types of gastric surgery, but it does not apply to peritonitis.

Choice C Reason: This is incorrect because stating that you will not be able to eat for several days is not an adequate explanation for inserting a nasogastric tube for a client with acute peritonitis. This statement does not address the rationale or the benefits of the procedure. It may also cause anxiety and resentment in the client.

Choice D Reason: This is the correct choice because removing secretions and decompressing the stomach is the main Reason for inserting a nasogastric tube for a client with acute peritonitis. Peritonitis is an inflammation of the peritoneum, the membrane that lines the abdominal cavity. It can cause abdominal distension, pain, nausea, and vomiting. A nasogastric tube can suction out the gastric contents and reduce the pressure and irritation in the abdomen.