# A nurse is preparing to administer insulin to a diabetic patient. Which assessment finding would be the MOST critical to evaluate before insulin administration?

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## 문제

A nurse is preparing to administer insulin to a diabetic patient. Which assessment finding would be the MOST critical to evaluate before insulin administration?

## 보기

1. Patient's understanding of diabetes management and dietary restrictions
2. Presence of lipodystrophy at previous injection sites
3. Current blood glucose level and time of last meal **✔ 정답**
4. Patient's preferred injection site and rotation schedule

**정답: 3**

## 해설

Assessing current blood glucose level and timing of last meal is critical to prevent hypoglycemia before insulin administration. Other options are important but less urgent safety assessments.

## 심화 해설

Critical Assessment Before Insulin Administration

The most critical assessment before administering any insulin is evaluating the patient's current blood glucose level and the time of the last meal. This is a fundamental safety principle in diabetes management because insulin's primary action is to lower blood glucose, and administering it without knowing the current glucose value or recent nutritional intake creates an immediate and severe risk of hypoglycemia.

The dynamic nature of glucose metabolism explains why this assessment is non-negotiable. Blood glucose levels fluctuate constantly in response to diet, physical activity, stress, and metabolic changes. Traditional static insulin regimens often fail to account for this individual variability, which can lead to suboptimal glycemic control [1]. Administering a dose of rapid-acting insulin when a patient's blood glucose is already low, or when they have not eaten recently, can precipitate a dangerous hypoglycemic event. Conversely, withholding insulin or administering an insufficient dose when glucose is elevated and a meal was recently consumed can exacerbate hyperglycemia. The goal is to achieve real-time adjustments that balance these two extremes [1].

The relationship between insulin pharmacokinetics and meal timing is critical. Ultra-rapid-acting insulin analogs are designed to more closely match the postprandial glucose excursion, but their rapid onset means the risk of hypoglycemia is heightened if a meal is delayed or missed after injection. Research comparing different insulin formulations during specific conditions like exercise demonstrates that even with proactive basal rate reductions, the timing of insulin action relative to glucose demands is the primary determinant of glycemic safety [2]. This principle applies directly to general care: a nurse must verify that the patient has recently eaten or will eat soon to ensure the administered insulin has a substrate to act upon, preventing an unsafe drop in blood glucose.

While other options represent important aspects of long-term diabetes care, they are not the most critical safety check immediately before administration. Assessing a patient's understanding of management (Option 1) is vital for education and self-care but does not prevent an immediate adverse event from a single dose. Checking for lipodystrophy (Option 2) ensures proper insulin absorption over time and prevents erratic glucose control, but it does not address the acute risk of the dose you are about to give. A patient's preferred site and rotation schedule (Option 4) are important for comfort and preventing tissue damage, yet they are secondary to the physiological imperative of matching the insulin dose to the patient's current metabolic state. The immediate priority is always to ensure the administered insulin will not cause harm by driving blood glucose to a dangerously low level, which is only possible by knowing the current blood glucose and the patient's prandial status.References (research sources)

- [1]Personalized Type 1 Diabetes Management: Reinforcement Learning-Based Insulin Dosing and Glucose Forecasting.Research articleTaku EM, Gupta V, Singhal A. (2026) · DOI: 10.2196/79195

- [2]Ultra-Rapid Lispro Has an Improved Pharmacokinetic Profile for Exercise Compared With Lispro, Resulting in Less Exercise-Associated Hypoglycemia in Adults With Type 1 Diabetes on Open-Loop Continuous Subcutaneous Insulin Infusion.Research articleLeohr JK, Abitbol A, Turner LV, Smith LaBell E, Ghosh A, Coutant DE, Riddell MC. (2026) · DOI: 10.2337/dc25-2294

## 임상 시나리오

Clinical Guide: Pre-Insulin Administration Safety Check

**Core Principle:** The immediate safety check before every insulin dose is verifying the current blood glucose and the patient's nutritional status (time of last meal, current intake). This prevents life-threatening hypoglycemia.

1. Assessment Protocol

- **Point-of-Care Glucose:** Obtain a current capillary blood glucose reading immediately before administration. Do not rely on prior shift values.

- **Dietary Intake:** Confirm the time of the last meal, current oral intake status (e.g., NPO, eating), and the percentage of the meal consumed if postprandial.

- **Correlate with Order:** Match the glucose value and meal timing to the prescribed insulin type (rapid-acting, short-acting, long-acting) and dose. A rapid-acting insulin order for a patient who is NPO and hypoglycemic must be held and the provider notified.

2. Critical Decision Points

- **Glucose < 70 mg/dL:** Hold rapid/short-acting insulin. Treat hypoglycemia per protocol. Recheck glucose in 15 minutes.

- **Patient NPO or Vomiting:** Hold rapid/short-acting insulin. Notify provider for potential basal insulin adjustment or dextrose infusion orders.

- **Unclear Meal Timing:** Clarify if the patient has eaten or will eat within the onset window of the ordered insulin before administering.

3. Nursing Actions and Rationale

- **Double-Check High-Risk Doses:** Always have a second nurse independently verify the insulin dose, patient identity, and current glucose before administering concentrated insulins (e.g., U-500) or IV bolus doses.

- **Document Immediately:** Record the glucose value, dose administered, site, and patient's intake status in the medication administration record.

- **Patient Education:** After the safety check, reinforce the reason for the timing of the injection relative to meals to empower the patient's self-management.

## 핵심 개념

- **Insulin** — A hormone secreted by the beta cells of the pancreas that lowers blood sugar. It is an essential medication that must be administered externally to diabetic patients.
- **Hypoglycemia** — A condition where blood sugar falls below the normal range (usually less than 70 mg/dL). It is accompanied by sweating, palpitations, dizziness, decreased consciousness, and is the most common and dangerous acute complication of insulin administration.
- **Blood Glucose Monitoring** — The process of checking blood sugar levels through a finger prick or a continuous glucose monitor (CGM). It serves as the basis for adjusting insulin dosage, meal planning, and exercise routines.
- **Lipodystrophy** — Changes in fat tissue caused by repeatedly injecting insulin into the same site. Lipoatrophy or lipohypertrophy can occur, making drug absorption irregular.
- **High-Alert Medication** — Drugs that have a particularly high potential to cause serious harm to patients when used incorrectly. These include insulin, anticoagulants, narcotic analgesics, etc., and require additional safety checks during administration.

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