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S T Larsen

Publications and source records attributed to S T Larsen.

5 recordsLinked to original sources
PubMed1990

Revision after osteotomy for gonarthrosis. A 10-19-year follow-up of 314 cases.

During a 10-year period, 314 tibial osteotomies were performed for medial gonarthrosis. At follow-up after 10-19 years, 62 knees had been revised by arthroplasty (52 cases) or reosteotomy (10 cases). The revision rate was 54/170 in undercorrected knees and 8/144 in knees with normalization or overcorrection of the hip-knee-ankle angle. Our results confirm that tibial osteotomy for gonarthrosis requires proper indications and precise surgery. Perhaps, given another 10 years, our osteotomies will have outlived contemporary arthroplasties.

Female↗
PubMed1989

Temperature elevation during knee arthroplasty.

The temperature in the tibia and in the saw blade were recorded during 30 knee arthroplasty operations. In the saw blade the median maximum temperature was 68 degrees C (45-100 degrees C). The corresponding bone temperatures at two levels approximately 2 and 3 mm below the cutting surface were 47 degrees C and 42 degrees C, respectively. Irrigation of the saw area with physiologic saline solution had only a minimal effect. During the cement-curing process, the temperature was 37 degrees C (31-50 degrees C) at the cement-bone interface. We conclude that the cutting procedure generates heat above the critical temperature for bone necrosis that may harm prosthetic fixation, notably for bone ingrowth.

Arthroplasty↗
PubMed1988

The significance of hemarthrosis of the knee in children.

Diagnostic arthroscopy was performed in 40 consecutive patients under 16 years of age with hemarthrosis of the knee. The age of the patients ranged from 10 to 15 years, median 13.7 years. Eighteen patients had ruptures of the anterior cruciate ligament; seven ruptures were partial. Only two cases of fractures of the tibial spine were encountered. Seven patients had midsubstance tears of the anterior cruciate ligament. Eleven patients had patellar dislocations. Six patients had minimal capsular disruptions as the cause of hemarthrosis. Three patients had osteochondritis dissecans of the knee and two patients had isolated ruptures of the medial collateral ligament. Twenty-eight of the patients underwent some form of operative repair. The clinical diagnosis was confirmed at arthroscopy in 17 of the 40 cases. The appearance of hemarthrosis of the knee usually signifies a serious knee injury and should be treated with the same importance as in adults, and as a rule arthroscopy should be carried out.

Arthroscopy↗
PubMed1987

Arthroscopy of the knee in children.

Diagnostic arthroscopy was performed in 174 consecutive patients under the age of 18 years. Eight arthroscopies were bilateral. The clinical diagnosis was confirmed in only three of 17 knees in children under aged 14 years and in 44 per cent of the knees in older children. The most commonly disproved diagnoses were torn meniscus and chondromalacia patella. Arthroscopy seldom changed the diagnosis in cases of osteochondritis dissecans. In 38 per cent of the knees, arthroscopy revealed no surgical treatable abnormality, and unnecessary arthrotomy was avoided. Arthroscopy in acute hemarthrosis revealed that ligamentous tears are rather common in children; in nine of 25 knees a partial or complete tear of the anterior cruciate ligament was demonstrated at arthroscopy. The clinical diagnosis was confirmed in eight knees in cases of hemarthrosis. There was no significant difference between the hemarthrosis group and the remaining group as regards a disproved clinical diagnosis. We conclude that arthrotomy should always be preceded by diagnostic arthroscopy in children and adolescents if the clinical diagnosis leaves any doubt.

Acute Disease↗