The nurse should question an order for bismuth salts for a client with what condition?

Oxygen cannot diffuse rapidly across the membrane to tissues in the eye. This is because diabetic retinopathy is a condition that occurs when high blood sugar levels damage the tiny blood vessels that nourish the retina, the light-sensitive tissue at the back of the eye. As a result, the retina becomes ischemic (lacking oxygen) and tries to grow new blood vessels that are fragile and leaky.

Choice A is wrong because inability of cells in the eye to reproduce is not a cause of diabetic retinopathy.

The retina has a high metabolic rate and needs a constant supply of oxygen and nutrients to function properly.

Choice B is wrong because increase of aqueous humor in the eye is not a cause of diabetic retinopathy.

Aqueous humor is the clear fluid that fills the front part of the eye, not the retina.

An increase of aqueous humor can cause glaucoma, which is a different eye disorder that affects the optic nerve.

Choice C is wrong because decrease of nerve innervations throughout the eye is not a cause of diabetic retinopathy.

Nerve innervations are the connections between nerves and other tissues, such as muscles or glands.

Diabetic retinopathy affects the blood vessels, not the nerves, of the retina.

This is because proton pump inhibitors (PPIs) are drugs that block the enzyme that produces hydrochloric acid in the stomach, thereby reducing the amount of acid secreted into the lumen. PPIs are commonly used to treat peptic ulcer disease and gastroesophageal reflux disease.

Choice B. Histamine-2 antagonist is wrong because histamine-2 antagonists (H blockers) are drugs that block the action of histamine on the parietal cells of the stomach, thereby reducing the amount of acid secreted into the lumen.

However, PPIs are more potent and effective than H blockers in suppressing acid secretion.

Choice C. Prostaglandin is wrong because prostaglandins are substances that protect the stomach lining from the damaging effects of acid and other factors.

Prostaglandins do not directly affect the secretion of acid into the lumen, but they may increase the production of mucus and bicarbonate that buffer the acid.

Choice D. Antipeptic agent is wrong because antipeptic agents are drugs that form a protective barrier over the ulcer crater, preventing further damage from acid and pepsin.

Antipeptic agents do not affect the secretion of acid into the lumen, but they may enhance healing by creating a favorable environment for tissue repair.

Normal ranges for hydrochloric acid secretion in the stomach are 1.5 to 3.5 liters per day, with a pH of 1.5 to 3.53.