A patient with tibial fracture develops compartment syndrome due to the following condition?

IGNOU Post B. SC. Nursing entrance -2021

Medical Surgical Nursing

Medium

Appeared in: IGNOU Post B. SC. Nursing entrance -2021

Explanation

A tibial fracture directly causes bleeding and swelling (edema) within the surrounding muscle compartment.
This accumulation of fluid increases the volume of contents within the space enclosed by the inelastic fascia.
The rise in fluid volume leads to a dangerous increase in internal pressure, which is the direct cause of compartment syndrome.
This internal pressure compresses blood vessels and nerves, compromising tissue perfusion.

Option A: While a combination of internal and external pressure is a common cause, the question asks for the condition resulting from the fracture itself. The fracture's direct effect is creating internal pressure; external pressure is an additional, but not guaranteed, factor.
Option C: External pressure alone is a cause of compartment syndrome, but the question links the condition to a tibial fracture, which is an internal source of pressure.
Option D: Systemic blood pressure (hypertension) is not the direct cause of localized pressure within a muscle compartment. Compartment pressure is a local phenomenon independent of the patient's overall blood pressure.

Clinical Relevance

Nursing practice connection: Use the key finding related to Pathophysiology of Acute Compartment Syndrome to guide bedside assessment, documentation, and the next nursing action.
Recognizing the signs of compartment syndrome is a critical nursing responsibility. The classic signs are the '6 Ps': Pain (out of proportion to the injury), Paresthesia, Pallor, Paralysis, Pulselessness, and Poikilothermia (coolness).
Pain that is unrelieved by analgesics and worsens with passive muscle stretching is the earliest and most sensitive sign.
Nursing intervention is key. The nurse must perform frequent neurovascular checks on patients with fractures. If compartment syndrome is suspected, the limb should be kept at heart level (not elevated) and any constrictive dressings or casts must be loosened or removed immediately after notifying the provider.

How to Approach the Question

First, identify the core clinical concepts: 'tibial fracture' and 'compartment syndrome'.
Understand the pathophysiology linking the two. A fracture causes injury, which leads to a response in the body.
Analyze the options based on this pathophysiology. The fracture causes bleeding and swelling. Is this an internal or external process?
Evaluate the source of pressure. The swelling and bleeding occur inside the muscle compartment, hence it is 'internal pressure'.
Differentiate between the primary cause (from the fracture) and contributing factors (like a cast). The question asks for the cause due to the fracture, making 'internal pressure' the most direct and accurate answer.

Concept Tested & Keywords

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E6 Nursing Brunner Adult Health 3SA Vol 1 Part 4 p. 120-122