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Zorluk: Çok zorSurgical and Procedural Interventions

A 27-year-old man is brought to the emergency department 45 minutes after a high-speed motorcycle collision. He was wearing a helmet. His Glasgow Coma Scale score is 15. Blood pressure is 110/70 mm Hg, and heart rate is 105/min. Secondary survey reveals a severe deformity of the left knee, with the tibia displaced posteriorly relative to the femur. There is an expanding, tense hematoma in the popliteal fossa. The left foot is pale and cold. Capillary refill is delayed to 5 seconds, and dorsalis pedis and posterior tibial pulses are absent on continuous-wave Doppler ultrasound. Sensation to light touch is decreased over the dorsum of the left foot.

Arrange the following steps in the most appropriate sequential order for the definitive management of this patient's left lower extremity injury.

  1. 1Emergent bedside closed reduction of the knee dislocation
  2. 2Immediate transport to the operating room without preoperative computed tomography angiography
  3. 3Proximal and distal vascular control with Fogarty balloon catheter thromboembolectomy
  4. 4Arterial reconstruction using an autologous reversed great saphenous vein graft
  5. 5Prophylactic four-compartment fasciotomy of the affected lower extremity

Cevap

The correct sequence of interventions is: 1) Emergent bedside closed reduction of the knee dislocation; 2) Immediate transport to the operating room without preoperative computed tomography angiography; 3) Proximal and distal vascular control with Fogarty balloon catheter thromboembolectomy; 4) Arterial reconstruction using an autologous reversed great saphenous vein graft; 5) Prophylactic four-compartment fasciotomy of the affected lower extremity.
The patient has a posterior knee dislocation complicated by a popliteal artery injury. He exhibits 'hard signs' of vascular injury, which include absent distal pulses, an expanding hematoma, and active ischemia (pale, cold foot). The first priority is to relieve tension on the neurovascular bundle by performing an immediate closed reduction of the knee at the bedside. Following reduction, the presence of hard signs mandates immediate transport to the operating room for surgical exploration; obtaining a CT angiogram is contraindicated as it delays limb-salvage surgery. In the operating room, the surgeon must first obtain proximal and distal control of the vessel and perform a balloon catheter thromboembolectomy to remove propagated clot that forms in the stagnant outflow tract. The injured arterial segment is then resected and reconstructed, preferably with an autologous reversed great saphenous vein graft harvested from the uninjured leg. Finally, because ischemia-reperfusion injury causes profound muscle edema, a prophylactic four-compartment fasciotomy of the lower leg must be performed to prevent compartment syndrome, which is highly prevalent following popliteal artery repairs.

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1
Emergent bedside closed reduction of the knee dislocation
Relieves traction on the popliteal artery and vein.
A dislocated knee with vascular compromise requires immediate bedside reduction to attempt restoration of blood flow and prevent further stretching of the intimal layer.
2
Immediate transport to the operating room without preoperative imaging
Expedites definitive surgical care.
Hard signs of vascular injury (expanding hematoma, absent Doppler pulses, distal ischemia) mandate immediate surgical exploration. Imaging such as CT angiography would cause unacceptable delay.
3
Vascular control and thromboembolectomy
Secures the bleeding vessel and clears propagated clot.
Before repair, the surgeon must achieve proximal and distal control, then use a Fogarty catheter to clear any secondary thrombus that has formed in the stagnant distal vascular bed.
4
Arterial reconstruction using a vein graft
Restores continuous arterial perfusion to the limb.
Popliteal artery injuries typically involve crush or stretch mechanisms that require resection of the damaged segment and interposition grafting, utilizing the contralateral great saphenous vein.
5
Prophylactic four-compartment fasciotomy
Prevents compartment syndrome.
Ischemia followed by reperfusion causes severe tissue edema. Popliteal injuries carry a disproportionately high risk of compartment syndrome, making prophylactic fasciotomy standard of care.

Anahtar Kavram

The step-wise surgical management of extremity vascular trauma presenting with hard signs of arterial injury.
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Surgical and Procedural Interventions

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