Extended Indications of Intramedullary Nailing in Treatment of Type VI Schatzker Tibial Plateau Fractures: A Case Report

Clinical Presentation and Intervention: We report a case of a 46-year-old male who sustained a closed fracture of the left tibial plateau and proximal fibula. The patient underwent an intramedullary nailing and hollow screws surgery. The long leg brace was fixed for two weeks after the operation. Two weeks later, functional exercise was conducted under the guidance of the rehabilitation physician. The patient improved muscle strength and obtained high scores for HSS and AKSS in a relatively short time.


Introduction
Type VI Schatzker tibial plateau fractures are very complex intra-articular fractures that often occur after high-energy trauma, as the fracture pattern involves joint and metaphyseal-diaphyseal region [1,2]. It is common sense that the more complex the fracture type, the more difficult the choice of treatment about the ideal type of fixation. The common standard treatment is dual-plate fixation through two incisions; however, the skin complication and infection rate are relatively high [3][4][5][6]. The aim of the present study was to report the treatment of type VI Schatzker tibial plateau fractures with a newly proposed technique, through supra-patellar approach utilizing intramedullary nailing and hollow screws.

Case Report
A previously healthy 46-year-old man who was walking experienced a traffic accident was sent to our emergency room(ER) with a comminuted fracture of the proximal fibula and left tibial plateau diagnosed by X-rays and confirmed by CT scan ( Figures   1A & 1B). No peripheral nerve and vascular damage were found, and a brace was immediately applied in the ER. The patient was affected by a C1 fracture according to the AO classification and a typical type VI Schatzker tibial plateau fracture according to the

Surgical Technique
The patient was placed in the supine position and combined spinal-epidural anesthesia (CSEA) induced. The surgery procedure was performed in two steps: firstly, the articular surface was The supra-patellar approach technique was described by previous literatures [7,8]. Postoperative sensation, movement and blood supply of distal limb were normal. After operation, the treatment protocol is identical to established protocols of tibial nailing, and early range of motion (ROM) exercises of the knee and ankle are encouraged. After immobilization with a long-leg brace for 2 weeks without knee movement, an early rehabilitation exercises were done in order to reduce swelling and improve knee function ( Figure   2).    The loss of blood was 50ml and the operation lasted only 150 minutes. An x-ray obtained 1 day postoperatively demonstrated the knee joint plane and the alignment of the lower limb were in satisfactory condition (Figure 3). On x-ray followed up 1 year, the joint space and articular surface were satisfactory (Figure 4). ROM of the left knee joint was 5° to 125° ( Figure 5). The Hospital for nail fixation employed in the present case can provide the advantage of minimal surgical dissection with preservation of the extraosseous blood supply to the fracture [11,12]. The indications for intramedullary nailing are more suitable for fractures involving the proximal and distal metaphysis. But a recently biomechanical study shows that intramedullary nailing and compression bolts can also maintain a rigid intra-articular stability similar to the stiff dual buttressing plating [13]. In this case, tibial intramedullary nailing through a supra-patellar approach has a number of potential advantages.
Firstly, tibial plateau fractures seem to be at risk for apex anterior deformities utilizing infra-patella intramedullary nailing because of the hyperflexion of the knee [12,14], whereas the Semiextended position through a suprapatellar portal can greatly eliminate the apex anterior deformities [15,16]. Secondly, tibial plateau fractures associated with serious soft tissue injuries involving the infrapatellar area may make it inappropriate to place a surgical incision in this area; the suprapatellar approach may provide a reasonable alternative in these situations [7]. Besides, the cost burden is lower than that of the traditional double plates.
However, this technique is difficult to restore serious joint surface subsidence of type VI Schatzker tibial plateau fracture, so it is not recommended for patients with articular surface collapse.

Conclusion
On the basis of the findings obtained from this study, we propose that supra-patellar approach utilizing intramedullary nailing and hollow screws technique is an effective minimal invasive method for the treatment of type VI Schatzker tibial plateau fractures. It can provide satisfactory radiologic and clinical outcomes, with no obvious complications. The patient improved muscle strength and obtained high scores for HSS and AKSS in a relatively short time.