1,721,027 research outputs found
Postoperative lumbar discitis
No full textWe analysed 13 cases of lumbar disc infection following surgical discectomy. Two groups of patients were identified. Ths six patients of group A reported that the initial symptoms of discitis had appeared a mean of 15 days after surgery; on average, antibiotic treatment was started 31 days following operation and continued for 62 days, and symptoms regressed after 3.9 months. Four patients showed moderate changes, while two had extensive osteolytic lesions of one or both vertebral bodies adjacent to the involved disc. In the 7 cases in group B, discitis was suspected a mean of 5 days and antibiotics were initiated a mean of 8 days following surgery; on average, symptoms regressed 1.8 months after operation. Only four patients showed vertebral radiographic changes and none had marked destructive lesions. In both groups erythrocyte sedimentation rate exceeded 70 mm/h in cases in which discitis was suspected. Tomograms and magnetic resonance studies were the most diagnostic imaging studies in the initial stages of the disease. All patients obtained satisfactory clinical results at the last follow-up. Careful observation of the early postoperative clinical course usually allows detection of disc space infection. Early and adequately prolonged antibiotic treatment may shorten the course of the disease and avoid extensive osteolytic vertebral lesions
Reformation of laminae and articular processes after decompressive surgery for lumbar stenosis
No full text
Historical perspectives
No full textA historical study on the development of the concept of
disc herniation has necessarily got to refer to the symptoms that it causes, since a prolapsed intervertebral disc
has been identified as the most common cause of lumbo-radiailar syndromes only in the second decade of this
century
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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