Abstract
Purpose: In the younger population there is substantial body of evidence that the outcome is better following open reduction and internal fixation of distal humerus fractures. In the elderly however, there is a need to assess the value of internal fixation of these fractures where osteoporosis is almost a rule than exception and poses considerable challenge to even very experienced trauma surgeon. The purpose of this study therefore was to assess the functional outcome of operative fixation of fractures of the distal humerus in a cohort of elderly patients (aged 75 and above). The reproducibility of four different scoring systems is also evaluated.
Patients and Methods: Between 1996 and 2000 out 125 patients who were treated in our institution, elderly patients above 75 years of age were studied. Demographic data such as age, sex, associated injuries and the pre-admission elbow function were recorded. All the fractures were classified according to the AO/ASIF system. At final follow up elbow function was analyzed using OTA’s rating system and these results were compared using three other scoring systems (Jupiter’s criteria, Aitkin’s and Rorabeck criteria, and the scoring system of Caja et al). Treatment options, surgical or non surgical was based on the medical condition of the patient and the personality of the fracture. Intra-operative details including ulnar nerve transposition, olecranon osteotomy and quality of fixation were recorded and analysed. Serial radiographs were studied in detail for union, loss of reduction, certain prognostic indicators such as anterior tilt of distal humerus, cubitus angle, any articular step, gap, heterotopic ossification and development of degenerative changes. Radiological analysis was correlated with functional outcome. The minimum follow up was 16 months (range 16–92).
Results: Out of 125 patients, 29 (23.2%) were above the age of 75 (5 male). The mean age of the patients was 84.6 years (range 75–100). One patient was lost to follow-up. In total 28 patients were studied with 29 fractures (one bilateral), five open (Gustilo’s grade I). Mechanism of injury included 24 falls and 4 motor vehicle accidents. In seven cases associated injuries (three with ipsilateral upper limb injuries) were noted. Twenty patients (69.8%) had noticeable osteopenia in the x rays. According to the AO/ASIF classification, there were eight type A, eight type B and thirteen type C fractures. Eight patients were treated non-operatively (3 type A, 2 type B, 3 type C) and 21 (5 type A, 6 type B, 10 type C) operatively. The injury-surgery interval ranged from 6hours to 5days. An olecranon osteotomy (chevron type, Jupiter’s technique) was performed in 21 cases, 2 underwent Triceps ‘tongue’ reflection and 7 had triceps splitting. Only one case had anterior transposition of the ulnar nerve and none in the series developed ulnar nerve symptoms. Local complications included one case of deep infection (leading to non-union), three cases of superficial infection treated with antibiotics, 3 non-unions (two affecting the fracture and the other one the site of the olecranon osteotomy). The former patients declined further intervention and the latter patient was asymptomatic. One patient needed removal of olecranon metal ware, one developed olecranon bursitis. Heterotopic ossification was present in one patient with no effect on the elbow function. Overall, the mean loss of extension was 22.5° (range 5–40°) and the mean flexion 98.6° (ranged 40o–132°). In the non-operative group the mean loss of extension and mean flexion achieved were 33.5oand 70.1° respectively whereas in the operative group were 22.7oand 106.6°. OTA grading revealed 3‘excellent’, 9‘good’, 7‘fair’and 2 ‘poor’ results in the operated group whereas in the non-operative group there were no ‘excellent’, 2‘good’, 3‘fair’, 3‘poor’results. It is of note that in the non-operative group there was a 37.5% incidence of poor results significantly higher than the operative group. The number of ‘acceptable’ (excellent + good) results was higher in the surgically treated group (52%) than in the non-surgically treated group (25.0%). The functional outcome was most closely related to anatomical reduction of the fracture (particularly articular step < 2mm) and anterior tilt of the distal humerus and was unaffected by the injury-surgery interval. It was found that the Jupiter score was less rigid for the range of movement but produced similar scores to OTA with less potential inter observer error compared to the two other scoring systems. 18 of the 21(85.7%) the patients had no limitation of rotation.
Conclusion & Significance: This study supports the view that the functional outcome following distal humerus fractures is better with operative treatment in patients above the age of 75. Out of the 4 functional assessment scoring systems evaluated only the OTA and Jupiter gave similar results.
The abstracts were prepared by Eleni Koutsoukou. Correspondence should be addressed to him at the Hellenic Association of Orthopaedic Surgery and Traumatology (HAOST), 20, A. Fleming str, 15123 Marousi, Athens, Greece.
