A nurse is preparing to administer Humalog (Lispro) insulin to a client who has type 1 diabetes mellitus.
Which of the following actions should the nurse take?

Choice A rationale

Fruity breath is a classic clinical manifestation of diabetic ketoacidosis rather than a hyperosmolar hyperglycemic state. It results from the production of acetone as a byproduct of ketone metabolism when the body breaks down fats for energy in the absence of insulin. In hyperosmolar hyperglycemic states, there is typically enough insulin present to prevent significant lipolysis and ketogenesis, so the characteristic fruity or sweet odor on the breath is absent.

Choice B rationale

A glucose level of 200 mg per dL is considered hyperglycemic but is far below the diagnostic threshold for a hyperosmolar hyperglycemic state. Normal fasting glucose is generally less than 100 mg per dL. In this specific condition, blood glucose levels typically exceed 600 mg per dL. The extreme hyperglycemia leads to severe osmotic diuresis and profound dehydration. A level of 200 mg per dL would be more consistent with routine diabetes management.

Choice C rationale

The presence of ketones in the urine is the hallmark of diabetic ketoacidosis, which involves the metabolic breakdown of fatty acids. In a hyperosmolar hyperglycemic state, the patient usually has sufficient endogenous insulin to suppress the formation of ketone bodies. Therefore, ketonuria is typically absent or only trace amounts are found. The absence of significant ketosis is a primary factor that differentiates this condition from the more acidic diabetic ketoacidosis state.

Choice D rationale

Elevated plasma osmolarity is the defining characteristic of this condition. It occurs due to extreme hyperglycemia causing a shift of water from the intracellular space to the extracellular space. Normal plasma osmolarity ranges from 275 to 295 mOsm per kg. In a hyperosmolar hyperglycemic state, the osmolarity often exceeds 320 mOsm per kg. This high concentration of solutes leads to severe cellular dehydration and significant neurological impairment in the affected client.

Choice A rationale

Allowing a patient to walk independently after receiving antianxiety preoperative medications, such as benzodiazepines, is a major safety risk. These medications frequently cause drowsiness, ataxia, and orthostatic hypotension, which significantly increase the risk of falls and related injuries. The nurse must prioritize physical safety by ensuring the patient remains in bed or is assisted by staff if movement is absolutely necessary. Independent ambulation is strictly contraindicated once these central nervous system depressants are administered.

Choice B rationale

Informed consent must be obtained before the administration of any mind-altering or sedative medications. Antianxiety drugs impair the client's cognitive function, judgment, and ability to process complex information, rendering them legally unable to provide truly informed consent. If the nurse allows the client to sign after medication administration, the consent is considered invalid and unethical. All legal documentation regarding the procedure must be finalized while the client is fully alert, oriented, and mentally competent.

Choice C rationale

Education regarding the surgical procedure should ideally occur during the preoperative phase before any sedative medications are given. Antianxiety medications interfere with memory consolidation and the ability to focus, meaning the client is unlikely to retain or understand the information provided. Effective patient teaching requires an alert mind. Attempting to educate the client at this stage is ineffective and could lead to post-operative confusion or non-compliance because the patient cannot recall the instructions or risks explained.

Choice D rationale

Placing side rails in an upright position is a standard safety intervention after a patient receives preoperative sedation or antianxiety medication. These drugs cause altered levels of consciousness and decreased coordination, which makes the patient vulnerable to accidentally falling out of bed. Ensuring the side rails are up provides a physical barrier and serves as a reminder for the patient to stay in bed. This action is a direct nursing responsibility aimed at maintaining a safe environment.