An economical systems for the recording of low frequency physiologic waveforms on magnetic tape has been designed. This recording system has accurately reproduced human limb impact response data in the range of DC-350 Hertz.
An economical systems for the recording of low frequency physiologic waveforms on magnetic tape has been designed. This recording system has accurately reproduced human limb impact response data in the range of DC-350 Hertz.
1. Painless osteoid-osteoma is a very rare entity but must be considered. 2. Finger localization for this tumor has been reported in very few cases. Differential diagnosis with other tumors or osteomyelitis should be kept in mind. 3. Eng block excision in similar cases should be seriously considered. 4. While the reason for the absence of pain in some cases has not been precisely determined, the lack of nerve fibers in this case suggests that this may be an important factor.
Compression plates provide a reliable method for stabilizing subtrochanteric osteotomies (and fractures when indicated) in children. Apart from a standard compression set, no special appliances are required. The hazards and inconveniences of nail plates and external fixation devices are avoided.
A patient was followed for about 11 years from the onset of Perthes Disease (age 12). The radiographs during the period demonstrated the actual development of a free ossicle which was formed by resorption of a portion of the original femoral head, resulting in a wafer and subsequent enlargement by new bone formation. Changes of a similar nature have been described in idiopathic necrosis of the femoral heads in adults.
In summary, a case report is presented of the rare complication of a stress fracture of the tibia following a high tibial osteotomy. The stress fracture is thought to result from: (1) Local osteoporosis (2) Abnormal stress secondary to the malunion of the tibial osteotomy (3) Fibula non union resulting in impairment of the tibia to withstand cyclic loading with weight bearing.
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