A patient has an order for a subcutaneous injection of insulin.
Into which of the following tissues will the nurse prepare to give this injection?

Rationale for Choice A:

Incorrect. While the patient is experiencing an allergic reaction, it is not moderate. The presence of difficulty breathing and a drop in blood pressure are signs of a severe, life-threatening anaphylactic reaction.

Anaphylaxis is a severe, rapid-onset allergic reaction that can lead to death if not treated promptly. It typically involves multiple body systems, including the skin, respiratory system, cardiovascular system, and gastrointestinal system.

Moderate allergic reactions typically present with localized symptoms such as hives, itching, and redness. They do not typically involve respiratory or cardiovascular compromise.

Rationale for Choice B:

Incorrect. The patient's symptoms are not consistent with food poisoning. Food poisoning typically causes gastrointestinal symptoms such as nausea, vomiting, diarrhea, and abdominal cramps. It does not typically cause hives, difficulty breathing, or a drop in blood pressure.

The timing of the symptoms, occurring 2 hours after receiving an antibiotic, strongly suggests an allergic reaction to the medication.

Rationale for Choice C:

Correct. The patient's symptoms are consistent with anaphylaxis, a severe allergic reaction that requires immediate emergency treatment.

Key features of anaphylaxis include:

Skin involvement (hives, itching, flushing, swelling)

Respiratory distress (difficulty breathing, wheezing, tightness in the chest) Cardiovascular compromise (drop in blood pressure, lightheadedness, fainting) Gastrointestinal symptoms (nausea, vomiting, diarrhea)

Swelling of the tongue or throat

Rationale for Choice D:

Incorrect. The patient's reaction is not mild and cannot be treated with an antihistamine alone. Antihistamines are effective for mild allergic reactions, but they are not sufficient to treat anaphylaxis.

Anaphylaxis requires immediate treatment with epinephrine, which is a life-saving medication that can reverse the effects of the allergic reaction.

Choice A rationale:

Intravenous (IV) administration delivers medication directly into the bloodstream. This route is not appropriate for insulin because it would result in a rapid and potentially dangerous drop in blood glucose levels. Insulin needs to be absorbed more slowly to mimic the natural release of insulin from the pancreas.

IV administration also requires sterile technique and specialized equipment, making it more complex and time-consuming than subcutaneous injection.

Additionally, there is a higher risk of infection and other complications with IV administration.

Choice B rationale:

The vastus lateralis is a muscle in the thigh that is commonly used for intramuscular (IM) injections. However, IM injections are not typically used for insulin administration because they can be more painful and have a slower absorption rate than subcutaneous injections.

IM injections also carry a higher risk of hitting a blood vessel, which could lead to erratic absorption of insulin.

Choice D rationale:

The deltoid is a muscle in the upper arm that can be used for subcutaneous injections. However, the abdomen is generally the preferred site for insulin injection because it has a greater amount of subcutaneous fat, which helps to slow the absorption of insulin and provide a more consistent effect.

The abdomen is also a more convenient site for self-injection, as it is easily accessible.

Choice C rationale:

The fatty tissue of the abdomen is the ideal site for subcutaneous insulin injection because it provides slow and consistent absorption of insulin.

The abdomen has a rich blood supply, which helps to distribute the insulin throughout the body.

The subcutaneous tissue in the abdomen is relatively thin, which makes it easy to inject insulin without causing pain or discomfort.

The abdomen is also a large area, which allows for multiple injection sites to be used and rotated to prevent lipohypertrophy (thickening of the subcutaneous tissue).