# A nurse is caring for a 35-year-old construction worker with a compound fracture of the right tibia who underwent open reduction and internal fixation (ORIF) 48 hours ago. The client reports severe pain (8/10) despite receiving prescribed analgesics, and the nurse observes swelling, pallor, decreased sensation, weak pedal pulses, and capillary refill of 4 seconds in the affected extremity. What is the nurse's priority action?

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> subject: Adult Health

## 문제

A nurse is caring for a 35-year-old construction worker with a compound fracture of the right tibia who underwent open reduction and internal fixation (ORIF) 48 hours ago. The client reports severe pain (8/10) despite receiving prescribed analgesics, and the nurse observes swelling, pallor, decreased sensation, weak pedal pulses, and capillary refill of 4 seconds in the affected extremity. What is the nurse's priority action?

## 보기

1. Administer an additional dose of prescribed pain medication
2. Notify the physician immediately about possible compartment syndrome **✔ 정답**
3. Elevate the affected extremity above heart level
4. Apply ice packs to reduce swelling and inflammation

**정답: 2**

## 해설

The client shows signs of compartment syndrome (severe pain, swelling, pallor, decreased sensation), a surgical emergency requiring immediate physician notification to prevent permanent tissue damage. Other interventions like pain meds, elevation, or ice are inappropriate as initial actions.

## 심화 해설

Priority Assessment and Clinical Reasoning

The client's presentation 48 hours after open reduction and internal fixation (ORIF) for a compound tibial fracture reveals a cluster of findings that must be rapidly differentiated. While severe pain unrelieved by analgesics can be a feature of complex regional pain syndrome (CRPS), the acute timeline and specific neurovascular signs point toward a more immediately limb-threatening emergency. The nurse's priority is to recognize the classic indicators of acute compartment syndrome (ACS).

The pathophysiology of ACS involves increased pressure within a closed osteofascial compartment, compromising microvascular perfusion and leading to tissue ischemia. The "6 Ps" are a hallmark of this condition: Pain (disproportionate to the injury and unrelieved by medication), Pallor, Paresthesia (decreased sensation), Pulselessness (weak pedal pulses), Paralysis, and Poikilothermia. The client exhibits pain rated 8/10 despite analgesia, swelling, pallor, decreased sensation, weak pulses, and a capillary refill of 4 seconds (normal is less than 2 seconds). The presence of palpable pulses does not rule out ACS, as capillary and venous occlusion occurs before arterial collapse. The critical distinction here is that ACS is a surgical emergency requiring immediate decompression, whereas CRPS, as described in the provided literature, is a chronic pain condition characterized by sensory, motor, and autonomic dysfunction that develops over a longer trajectory following trauma or nerve injury [1].

Analysis of Incorrect Options

**Option 1: Administer an additional dose of prescribed pain medication.** While pain management is essential, administering more analgesic without addressing the underlying cause of the escalating, disproportionate pain is dangerous. In ACS, pain is mediated by ischemia and rising compartment pressure, not just by the initial surgical trauma. Masking this cardinal symptom with narcotics delays definitive treatment and can lead to irreversible muscle and nerve necrosis within 6 to 8 hours.

**Option 3: Elevate the affected extremity above heart level.** This is contraindicated in suspected compartment syndrome. Elevation decreases arterial perfusion pressure further, worsening the existing ischemia within the compromised compartment. For ACS, the limb should be kept at heart level to maximize arterial inflow without impeding venous drainage.

**Option 4: Apply ice packs to reduce swelling and inflammation.** Applying ice causes vasoconstriction, which further compromises the already tenuous microvascular perfusion in the affected compartment. This intervention can accelerate tissue hypoxia and damage.

Pathophysiological Correlation with CRPS

While the priority here is ruling out ACS, the provided source on CRPS highlights why ongoing neurovascular assessment is crucial after trauma. CRPS type II is directly associated with nerve damage, which can occur with a compound fracture or surgical fixation [1]. The disproportionate pain and sensory changes (allodynia, hyperalgesia) described in CRPS share some superficial overlap with ACS pain. However, CRPS typically develops over weeks and involves a chronic phase with trophic changes, sudomotor abnormalities, and central sensitization, which are not consistent with the acute, 48-hour post-operative deterioration seen here [1]. The immediate threat to limb viability from unchecked compartment pressure takes absolute precedence.References (research sources)

- [1]Complex Regional Pain Syndrome: Diagnosis, Pathophysiology, and Treatment Approaches.Research articleLima Pessôa B, Netto JGM, Adolphsson L, Longo L, Hauwanga WN, McBenedict B. (2024) · DOI: 10.7759/cureus.76324

## 임상 시나리오

Acute Compartment Syndrome: Post-ORIF EmergencyRecognizing the 6 Ps and prioritizing immediate intervention
Acute compartment syndrome (ACS) is a surgical emergency where increased pressure within a closed fascial space compromises microvascular perfusion. The hallmark is pain disproportionate to the injury that is unrelieved by analgesics. Key assessment findings include the 6 Ps: Pain, Pallor, Paresthesia, Pulselessness (late sign), Paralysis (late sign), and Poikilothermia. A capillary refill >2 seconds indicates compromised perfusion.

The nurse's priority is to notify the physician immediately. Definitive treatment is a fasciotomy to relieve pressure. Do not rely on the presence of palpable pulses to rule out ACS; capillary and venous occlusion precedes arterial collapse. Delaying notification to administer more pain medication or apply ice risks irreversible tissue necrosis and limb loss.

CautionNever elevate the limb above heart level in suspected ACS; this reduces arterial perfusion. Keep the limb at heart level. Do not apply ice, as cold causes vasoconstriction and worsens ischemia.

## 핵심 개념

- **Acute Compartment Syndrome (ACS)** — A surgical emergency where increased pressure within a closed fascial space compromises circulation, leading to tissue ischemia and necrosis.
- **Open Reduction and Internal Fixation (ORIF)** — A surgical procedure to repair a fracture by exposing the bone, aligning the fragments, and securing them with hardware like plates and screws.
- **6 Ps of Compartment Syndrome** — Classic signs: Pain (disproportionate, unrelieved), Pallor, Paresthesia, Pulselessness (late sign), Paralysis (late sign), Poikilothermia.
- **Capillary Refill** — A test of peripheral perfusion; normal refill time is less than 2 seconds. Prolonged time indicates poor arterial flow.
- **Neurovascular Assessment** — Systematic evaluation of nerve and blood supply to an extremity, checking for pain, sensation, motor function, color, temperature, pulses, and capillary refill.

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