Abstract
Background: Hamstring injuries at the musculotendinous junction are relatively common. However, injuries to the proximal hamstring account for just 12% of hamstring injuries. Surgical repair of these injuries including both open and endoscopic techniques are becoming increasingly more common. Indications: Surgical intervention is generally reserved for cases with 2 or more torn tendons and at least 2 centimeters of retraction. Technique Description: The combined open and endoscopic technique utilizes direct posterior and posterolateral portals. After visualizing the posterior femoral cutaneous (PFCN) and sciatic nerves (SN), the proximal hamstring tear is identified, and the shaver is used to remove any surrounding adhesions and aid in clearing any hematoma. The ischial tuberosity is prepared using a shaver, radiofrequency ablation, and a 5.5 mm, round arthroscopic burr. Two, 4.5 mm, doubled-loaded anchors are placed into the ischium. The incision for the open portion of the case is created by incising the skin between the direct posterior and posterolateral portals. A dissection is continued down to the gluteal fascia, and the gluteal fascia is incised in line with the surgical incision. The gluteus maximus is retracted then the hamstring stump is secured with a stay suture and brought outside the surgical incision for inspection. The double-loaded sutures are passed in a running locking technique. The other suture limbs are then passed through the central aspect of the tendon and tensioned to reduce the proximal hamstring onto the prepared tuberosity. Results: Significant postoperative improvements in patient-reported outcomes have been reported for open and endoscopic repairs in isolation, but to date there are no outcomes studies on the combined “Scopen” technique. Postoperative complications may include numbness or neuropraxia, re-rupture, infection, and deep vein thrombosis (DVT). Discussion: The endoscopic portion allows an improved view and preservation of the SN and PFCN, as well as a detailed view of the ischial tuberosity for decortication and anchor placement in comparison with a purely open approach. In comparison with a purely endoscopic approach, this combined approach can be used in patients with retraction >4 cm, and can also be utilized for chronic, retracted tears as well.
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