Thirty years old patient has an ulcer over lateral malleolus. Nurse caring for this patient understands, the pain of the patient is due to:

Appeared in: OSSSC Nursing Officer-2023

Explanation

Ulcers located on the lateral malleolus are classically associated with arterial insufficiency (peripheral arterial disease).
The underlying cause of arterial ulcers is ischemia, a lack of blood flow and oxygen to the tissues, which leads to tissue necrosis and severe pain.
This ischemic pain, often called 'rest pain', is typically sharp and worsens when the leg is elevated because gravity further hinders arterial blood flow.
The other options are more characteristic of venous ulcers, not arterial ulcers.

Option A: Significant edema is a primary feature of venous stasis ulcers, which are caused by venous insufficiency and pooling of blood. Arterial ulcers typically have minimal to no edema.
Option B: Heavy exudate (drainage) is characteristic of venous ulcers due to venous hypertension and fluid leakage. Arterial ulcers are typically dry with minimal exudate because of the poor blood supply.
Option C: While infection can develop in any ulcer and cause pain, it is a secondary complication. The primary, underlying cause of pain in an arterial ulcer is the tissue ischemia itself.

Clinical Relevance

Nursing practice connection: Use the key finding related to Pathophysiology and characteristics of peripheral vascular ulcers to guide bedside assessment, documentation, and the next nursing action.
Accurately identifying the type of ulcer is critical for nursing management. The interventions for arterial and venous ulcers are often opposite. For example, elevating the legs is beneficial for venous ulcers but harmful for arterial ulcers.
A key nursing assessment for a patient with a leg ulcer is checking peripheral pulses (dorsalis pedis, posterior tibial) and calculating the Ankle-Brachial Index (ABI). A low ABI (less than 0.9) confirms peripheral arterial disease.
Patient education for arterial ulcers includes keeping the leg in a neutral or dependent position to improve blood flow, protecting the limb from injury and cold, and managing risk factors like smoking and diabetes.

How to Approach the Question

First, identify the key information in the question stem: the location of the ulcer is the 'lateral malleolus'.
Recall or look up the classic locations for different types of leg ulcers. Associate the lateral malleolus (outer ankle) with arterial ulcers.
Connect the term 'arterial ulcer' to its underlying pathophysiology, which is 'ischemia' (lack of arterial blood flow).
Evaluate the options based on this connection. Ischemia is the direct cause of tissue damage and pain in arterial ulcers.
Eliminate the other options by associating them with venous ulcers: 'Edema' and 'Exudate' are hallmarks of venous stasis. 'Infection' is a potential complication of any ulcer, but not the primary underlying cause of pain in this specific type.

Concept Tested & Keywords

Concept Tested: Pathophysiology and characteristics of peripheral vascular ulcers
Stem keywords: ulcer, lateral malleolus, pain
Lead-in keywords: due to
Clinical cues: Location of ulcer (lateral malleolus) is a key diagnostic clue for arterial insufficiency.

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E6 Nursing Brunner Adult Health 3SA Vol 1 Part 3 p. 82-84

E6 Medicine Davidson Principles Practice 24e p. 1244-1246

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Attempt every question from this paper in a timed mock, then review the full solution for each one.