Biomedical subjects
Publications and source records attributed to D J Learmonth.
Sixty patients with acute knee trauma were examined radiographically at presentation and subsequently examined under anaesthetic, when arthroscopy was performed. The aim was to assess whether a normal radiograph at presentation excluded significant knee pathology. Nine patients with significant pathology (25%) had normal radiographs at presentation.
Traumatic osteochondromas may develop following damage to the growth plate, but these lesions are rare. Osteochondromas developing secondary to a slipped upper femoral epiphysis (SUFE) have not been previously described. We report such a case and discuss its pathogenesis in relation to the possible aetiologies of primary osteochondromas and SUFE.
Anterior cruciate ligament (ACL) tears are frequently associated with abnormalities of the lateral femoral condyle as shown by magnetic resonance imaging. The mechanism of injury has been described as due to bone compression during knee trauma. This may lead to compression of the lateral condylopatellar notch (sulcus). It has been suggested that detection of a deep notch on the plain lateral radiograph is a useful indirect sign of ACL tear. Depth of this notch was measured in 34 consecutive prospective patients assessed as having acute ACL tear clinically and proven at arthroscopy. In no patient was the notch deep, suggesting that this is not a useful sign in acute tears of the anterior cruciate ligament.
We treated 39 knees with chronic deficiency of the anterior cruciate ligament by reconstruction using the ABC carbon and polyester prosthetic ligament; 31 (79.5%) were reviewed at an average follow-up of 34 months. There had been four complete failures requiring revision. The remaining 27 were studied in detail. On the Lysholm rating, only 11 knees (41%) had good results with a score of over 76. The mean anterior drawer movement was reduced from 7.6 mm before operation to 5.8 mm at review. The mean difference from the opposite uninjured knee was 3.9 mm before operation, 1 mm (in 21 patients) at mean follow-up of 7.4 months and 2.5 mm (in 27 patients) at 34 months, indicating progressive loss of effect. In our opinion the results are unsatisfactory: we do not recommend the use of this prosthetic ligament.
A total of 220 consecutive young adults with a traumatic effusion of the knee joint, seen initially in the accident and emergency department, have been reviewed in a weekly orthopaedic acute knee clinic. Of the patients, 80 per cent were seen within 3 days of the injury, and all patients were seen within 8 days of the injury. There were 62 patients (28 per cent) with damage to the anterior cruciate ligament (ACL), of whom 37 patients (17 per cent) had acute complete ACL tears. There were 92 haemarthroses in this series, in which there was a high incidence of ACL damage. The Lachman test was used in this study and identified 73 per cent of the acute complete ACL tears preoperatively and all the chronic ACL injuries. Acute ACL injuries can be diagnose early provided adequate resources are available to provide clinic and theatre facilities. Early diagnosis enables the patients to be given clear advice on future job and sports prospects and allows selection of patients most likely to benefit from augmented repair of the ligament. Associated meniscal lesions can also be identified and treated at an early stage.
There were 83 survivors of the M1 aircrash admitted to hospital; of these, 28 patients sustained a total of 40 open fractures. These open fractures were classified as 19 grade 3, 16 grade 2 and five grade 1. There were six upper limb fractures and 34 lower limb fractures. A high proportion of grade 3 open fractures were identified in this series (47 per cent) and one-half of these occurred at or below the ankle. This reflected the high energy and direction of the forces involved in the aircrash. The early results in terms of the incidence of wound infection (15 per cent), delayed wound healing (7.5 per cent) and skin flap necrosis (7.5 per cent) were similar to other series. The controversy over whether to leave grade 3 wounds open or closed was not clarified by this study, but the closure of grade 3 wounds after internal fixation is to be avoided. This study emphasizes the need for provision of adequate specialist manpower, equipment and resources to manage the unexpected major disaster successfully.
The 79 survivors of the M1 aircrash have been assessed at an average of great britain 1 year after the accident. Return to work, continued hospital care and recovery from injuries has been found to be related to the severity of injury. The 188 pelvic and limb fractures have been reviewed and the incidence of complications from these injuries has been low. Spinal and lower limb injuries account for the majority of the residual disability.
The incidence of a delay in the diagnosis of injuries from the 83 survivors of the M1 aircraft accident is described. A total of 32 injuries in 25 patients were not initially diagnosed, nine each in the upper and lower limbs and 14 in the spine. This was equivalent to 9.6 per cent of all the major injuries suffered by the survivors. Five patients required surgery for a late diagnosed injury. The incidence of a delayed diagnosis injury (DDI) was not related to the overall severity of injury. Delay in diagnosis of injuries after such a major accident was attributable to failure of clinical examination, failure to radiograph symptomatic areas and failure of radiographic interpretation.
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