A parent calls a clinic and reports to a nurse that his 2-month-old infant is hungry more than usual but is projectile vomiting immediately after eating. Which of the following responses should the nurse make?

Choice A: Using a pincer grasp indicates a need for further evaluation, as it is a developmental milestone that is usually achieved by 9 to 10 months of age. A pincer grasp is the ability to pick up small objects using the thumb and index finger. A 7-month-old infant should be able to use a raking grasp, which is the ability to scoop up objects using all fingers.

Choice B: Having a fear of strangers does not indicate a need for further evaluation, as it is a normal and expected behavior for a 7-month-old infant. A fear of strangers is a sign of attachment and recognition of familiar and unfamiliar faces. A 7-month-old infant may cry, cling, or turn away from strangers.

Choice C: Showing preferences towards foods does not indicate a need for further evaluation, as it is a normal and expected behavior for a 7-month-old infant. Showing preferences towards foods is a sign of individuality and taste development. A 7-month-old infant may accept or reject certain foods based on their flavor, texture, or appearance.

Choice D: Babbling one-syllable sounds does not indicate a need for further evaluation, as it is a normal and expected behavior for a 7-month-old infant. Babbling one-syllable sounds is a sign of language and communication development. A 7-month-old infant may make sounds such as "ba", "da", "ga", or "ma".

Choice A: This instruction is incorrect, as withholding insulin dose if feeling nauseous can cause hyperglycemia, which is high blood sugar, and diabetic ketoacidosis, which is a life-threatening condition that occurs when the body breaks down fat for energy and produces ketones. Ketones are acidic substances that can cause nausea, vomiting, abdominal pain, dehydration, or coma. The child should take their insulin dose as prescribed and monitor their blood sugar levels more frequently when they are sick.

Choice B: This instruction is unnecessary, as notifying the provider if blood glucose levels are within normal parameters does not require any action or intervention. The child and the parents should notify the provider if blood glucose levels are above or below the target range, which is usually 70 to 180 mg/dL for children with type 1 diabetes mellitus. The child and the parents should also notify the provider if they have any signs or symptoms of hypoglycemia, hyperglycemia, or diabetic ketoacidosis.

Choice C: This instruction is incorrect, as limiting fluid intake during mealtime can cause dehydration, which can worsen the symptoms and complications of type 1 diabetes mellitus. Dehydration can cause increased thirst, dry mouth, fatigue, headache, or dizziness. The child should drink plenty of fluids during meal time and throughout the day to hydrate their body and flush out excess glucose and ketones.

Choice D: This instruction is correct, as testing the urine for ketones can help detect diabetic ketoacidosis, which is a life-threatening condition that occurs when the body breaks down fat for energy and produces ketones. Ketones are acidic substances that can cause nausea, vomiting, abdominal pain, dehydration, or coma. The child should test their urine for ketones when their blood sugar levels are above 240 mg/dL or when they are sick. The child and the parents should notify the provider if the urine test shows moderate or large amounts of ketones.