Jordy van Sambeeck

Chapter 3 50 Patient characteristics Number of patients 437 Number of knees 529 Mean age (range) 23.2 (13.8-59.9) N patients (%) Female (%) 389 (74) Indication Patellofemoral pain 171 (32.3) Patellofemoral dislocations 249 (47.1) Miscellaneous 2 (0.4) Previous procedures performed None 436 (82) Arthroscopy 41 (7.8) MPFL reconstruction 15 (2.8) T ibial tubercle transposition 7 (1.3) with lateral release 9 (1.7) VMO-plasty 3 (0.6) Trochleoplasty 1 (0.2) Miscellaneous 9 (1.7) Additional procedures performed None 227 (43) MPFL reconstruction 248 (47) Trochleoplasty and MPFL reconstruction 53 (10) Lateral lengthening 16 (3.0) Table 1. Descriptive statistics Major complications related to the surgical procedure were reported in 9 patients (1.7%) and are presented in table 2. These major complications included: one tibial fracture at the siteof a largeAOscrewof aprior tibial tubercleosteotomy performed elsewhere requiring internal plate fixation (figure 2a-c) and one patient with a fracture of the tibial tubercle after a fall from the stairs 3 months postoperatively requiring open reduction and internal fixation (figure 3a-c). A nonunion was observed in three patients (0.6%), of whom two required subsequent surgery and one was treated with 6 additional weeks of cast immobilization (figure 4a-c). One patient suffered a deep wound infection which required surgical debridement and one patient suffered a low-grade infection which was arthroscopically debrided. In two patients a large hematoma was surgically evacuated. Minor complications included superficial wound infection treated with antibiotics in five patients.