A nurse observes that the fingers of the casted forearm of a patient with fracture ulna are pale, cool and capillary refill is delayed. She has to interpret it as:

1. A

   Nerve impairment is developing in the fingers

2. B

   Arterial blood supply to the fingers is reduced

3. C

   A normal finding

4. D

   Venous stasis occurring in the fingers

Appeared in: OSSSC Nursing Officer-2023

Explanation

• The combination of pale (pallor), cool (poikilothermia), and delayed capillary refill are hallmark signs of reduced arterial blood supply.
• A tight cast can compress the arteries, restricting the flow of oxygenated blood to the tissues distal to the cast.
• This condition is known as ischemia and is a serious complication that can lead to tissue necrosis if not addressed promptly.
• These signs are part of the critical "6 Ps" of neurovascular assessment that nurses must monitor for after an injury or casting.

Why Other Options Were Wrong

• Option A: Nerve impairment primarily presents with sensory or motor changes, such as paresthesia (numbness, tingling, "pins and needles"), increased pain, or paralysis (inability to move the fingers). While it can occur with vascular compromise (as in compartment syndrome), the initial signs described are circulatory.
• Option C: These findings are highly abnormal and indicate a serious complication. Normal findings would include fingers that are warm, pink, with a brisk capillary refill (less than 3 seconds), and minimal swelling.
• Option D: Venous stasis, or impaired venous return, would cause blood to pool in the extremity. This leads to cyanosis (a bluish discoloration), significant edema (swelling), and the skin would likely feel warm, not cool.

Related Visual

Clinical Relevance

• Nursing practice connection: Use the key finding related to Neurovascular assessment of a casted extremity to guide bedside assessment, documentation, and the next nursing action.
• Early recognition of neurovascular compromise is a critical nursing responsibility that can prevent permanent disability or limb loss.
• This assessment is a priority for any patient with a cast, splint, or significant extremity swelling.
• What if? If the patient's fingers were swollen, bluish, and warm, the nurse should suspect venous stasis. The intervention would still involve elevating the limb and notifying the provider, but the underlying cause is different (impaired outflow vs. impaired inflow).

How to Approach the Question

• First, identify the key clinical signs presented in the scenario: pale color, cool temperature, and delayed capillary refill.
• Analyze each sign's physiological meaning. Pallor and coolness indicate a lack of warm, oxygenated arterial blood.
• Evaluate the options based on this analysis. Match the cluster of signs to the most fitting pathophysiological condition.
• Eliminate options that do not align. Nerve impairment has different primary signs (sensory/motor). Venous stasis has opposite signs (cyanosis, warmth). A normal finding is incorrect as these are warning signs.
• Conclude that the signs directly point to a reduction in arterial blood supply.

Concept Tested & Keywords

• Concept Tested: Neurovascular assessment of a casted extremity
• Stem keywords: casted forearm, fracture ulna, pale, cool, capillary refill delayed
• Lead-in keywords: interpret it as
• Clinical cues: The combination of pallor, coolness, and delayed capillary refill points specifically to an arterial problem.

Question ID

Q1GMiMhRk6OZCgBwy5cJSl

Copy ID

Reference Book

E6 Nursing Fundamentals Taylor p. 400-402

E6 Nursing Brunner Adult Health 3SA Vol 1 Part 4 p. 118-120

E6 Nursing Brunner Adult Health 3SA Vol 1 Part 3 p. 54-56