Which of the following is the appropriate route for administration of insulin?

IGNOU Post B. SC. Nursing entrance-2019

Pharmacology

Easy

Appeared in: IGNOU Post B. SC. Nursing entrance-2019

Explanation

The subcutaneous route involves injecting insulin into the adipose (fat) tissue just below the skin.
This method allows for a slow, sustained rate of absorption into the capillaries, which is ideal for routine blood glucose management.
Slow and steady absorption mimics the body's natural basal insulin release, preventing sharp fluctuations in blood sugar levels.
It is the standard, recommended route for self-administration of insulin by patients with diabetes.

Option A: Intramuscular injections lead to rapid and unpredictable absorption of insulin because muscles have a richer blood supply than subcutaneous tissue. This significantly increases the risk of hypoglycemia (dangerously low blood sugar).
Option B: The intradermal route has the longest and most unreliable absorption time of all parenteral routes. It is not suitable for delivering medications that require systemic effects, like insulin.
Option D: Intravenous administration provides immediate effect, which is too rapid and dangerous for routine insulin therapy. It bypasses the absorption process entirely, leading to a high risk of severe hypoglycemia.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Route of Administration for Insulin as background academic context rather than a clinical decision trigger.
Proper route selection is a critical patient safety issue. Administering insulin via the wrong route (e.g., intramuscularly) can lead to severe hypoglycemia, a medical emergency.
Patient education is a key nursing responsibility. Nurses must teach patients how to correctly self-administer subcutaneous insulin, including site rotation, injection angle, and signs of hypoglycemia.
What if the patient is experiencing Diabetic Ketoacidosis (DKA)? In this critical care scenario, the priority changes from slow maintenance to rapid correction. The appropriate route would become intravenous (IV) administration of regular insulin via a continuous infusion, under strict monitoring of blood glucose and electrolytes.

How to Approach the Question

First, identify the core of the question, which is asking for the standard, appropriate route for insulin administration.
Recall the different parenteral routes of administration: Intradermal (ID), Subcutaneous (SC), Intramuscular (IM), and Intravenous (IV).
Consider the purpose of insulin therapy: to provide a steady level of glucose control, mimicking the body's natural processes. This requires slow, predictable absorption.
Evaluate each option: IV is for emergencies (immediate effect). IM is too fast and unpredictable. ID is for testing (very slow absorption).
Conclude that the subcutaneous route provides the slow, sustained absorption necessary for effective and safe routine insulin therapy.
Select 'Subcutaneous' as the correct answer.

Concept Tested & Keywords

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