A nurse is providing teaching to an adolescent who has type 1 diabetes mellitus. Which of the following should the nurse include in the teaching?

Choice A reason: Using a 20 gauge needle is not the best action, as it is too large for a preschooler's deltoid muscle. A 20 gauge needle has a diameter of 0.9 mm, which may cause more pain and tissue damage. A smaller gauge needle, such as a 23 or 25 gauge, is recommended for intramuscular injections in children.

Choice B reason: Inserting the needle just below the acromion process is not the best action, as it may not reach the deltoid muscle. The acromion process is the bony prominence at the top of the shoulder. The deltoid muscle is located on the lateral aspect of the upper arm, about two finger widths below the acromion process. The nurse should palpate the acromion process and measure the distance to the injection site.

Choice C reason: Inserting the needle at a 15 degree angle is not the best action, as it may not penetrate the muscle tissue. A 15 degree angle is used for intradermal injections, which are given into the dermis, the layer of skin below the epidermis. Intramuscular injections are given into the muscle tissue, which requires a 90 degree angle. The nurse should hold the syringe perpendicular to the skin and insert the needle quickly and firmly.

Choice D reason: Using a 1.8 mm (0.5 in) needle is the best action, as it is the appropriate length for a preschooler's deltoid muscle. The length of the needle should be based on the child's age, weight, and muscle mass. A 1.8 mm (0.5 in) needle is suitable for children who weigh less than 12 kg (26 lb). A longer needle, such as a 2.5 mm (1 in) needle, may be used for children who weigh more than 12 kg (26 lb).

Choice A reason: Failure to thrive is not a likely condition, as it is a term used to describe inadequate growth or weight gain in children. The infant has a low weight percentile, but not below the 5th percentile, which is the usual cutoff for failure to thrive. The infant's length and head circumference are within the normal range, which also does not indicate failure to thrive.

Choice B reason: Microcephaly is not a probable condition, as it is a condition where the head size is much smaller than normal for the age and sex of the child. The infant has a high head circumference percentile, which is the opposite of microcephaly. Microcephaly can be caused by genetic disorders, infections, or brain damage.

Choice C reason: Hydrocephalus is a possible condition, as it is a condition where excess cerebrospinal fluid accumulates in the brain, causing increased pressure and enlargement of the head. The infant has a high head circumference percentile, which can indicate hydrocephalus. The infant also has a low weight percentile, which can be a result of poor feeding or vomiting due to increased intracranial pressure. T

Choice D reason: Macrocephaly is not a definite condition, as it is a term used to describe a head size that is much larger than normal for the age and sex of the child. The infant has a high head circumference percentile, but not above the 97th percentile, which is the usual cutoff for macrocephaly. Macrocephaly can be caused by genetic factors, benign familial macrocephaly, or other conditions, such as hydrocephalus.