Examkin

Soru

Zorluk: ZorOrthopedic Surgery

A 5-year-old boy is brought to the emergency department after falling from a trampoline onto his outstretched right hand. He is crying and refuses to move his right arm. Physical examination reveals a gross, "S-shaped" deformity of the right elbow with significant soft tissue swelling. The right hand is pale and cool, and the radial pulse is absent on palpation. Radiographs show a completely displaced, extension-type supracondylar fracture of the humerus. The patient is immediately taken to the operating room, where closed reduction and percutaneous pinning are performed. Following stabilization of the fracture, the right hand remains pale and cool, and the radial pulse cannot be detected by Doppler ultrasound. Which of the following is the most appropriate next step in the management of this patient?

  1. Immediate surgical exploration of the antecubital fossaCevap
  2. B
    Computed tomography angiography of the right upper extremity
  3. C
    Measurement of forearm intracompartmental pressures
  4. D
    Observation with continuous pulse oximetry on the right index finger
  5. E
    Application of a circumferential long-arm cast

Cevap

Immediate surgical exploration of the antecubital fossa
The correct answer is immediate surgical exploration of the antecubital fossa. This patient presents with a completely displaced supracondylar humerus fracture, which carries a high risk of injury to the brachial artery and median nerve. In a patient with a pulseless and pale (ischemic) hand pre-operatively, the first step is urgent closed reduction and percutaneous pinning (CRPP) to realign the anatomy, which frequently relieves kinking or compression of the brachial artery. However, if the hand remains pale and pulseless after fracture reduction and stabilization, it indicates persistent arterial occlusion, such as arterial entrapment within the fracture site, an intimal tear, or complete vessel transection. In this scenario, immediate surgical exploration of the antecubital fossa is mandatory to identify and repair the vascular injury. It is critical to distinguish this from a 'pink and pulseless' hand, where collateral circulation is adequate, allowing for close observation without immediate exploration.

Adım Adım Çözüm

1
Identify the primary diagnosis and complication.
Supracondylar fracture of the humerus with post-reduction ischemia (pale and pulseless hand).
To determine the acuity and nature of the neurovascular compromise.
2
Differentiate between 'pink and pulseless' versus 'pale and pulseless' presentations post-reduction.
The hand is pale and cool, indicating severe ischemia lacking collateral perfusion.
This distinction dictates whether the patient can be safely observed or requires immediate surgery.
3
Select the appropriate next step in management.
Immediate surgical exploration of the antecubital fossa.
To directly visualize, decompress, or repair the compromised brachial artery.

Anahtar Kavram

Management of vascular complications in pediatric supracondylar humerus fractures
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Konular

Orthopedic Surgery

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