AIM: To measure the forces applied during distraction of growing-rods in early onset scoliosis(EOS), aimed at developing a motorized elongation device.METHODS: A consecutive series of measurements were carried out to ...AIM: To measure the forces applied during distraction of growing-rods in early onset scoliosis(EOS), aimed at developing a motorized elongation device.METHODS: A consecutive series of measurements were carried out to analyze the forces applied by the surgeon during distraction of single growing-rods in 10 patients affected by EOS(mean age 8.3 years; range 6 to 10 years) undergoing the first distraction 6 months following implantation of the rods. For each measurement, output from the transducer of a dedicated pair of distraction calipers was recorded at zero load status and at every 1 mm of distraction, up to a maximum of 12 mm for each of the two connected rods.RESULTS: Twenty measurements were obtained showing a linear increase of the load with increasing distraction, with a mean peak force of 485 N at 12 mm distraction and a single reading over 500 N. We did not observe bone fractures or ligament disruptions during or after rod elongations. There was one case of superficial wound infection in the cohort.CONCLUSION: The safe peak force carrying capacity of a motorized device for distraction of growing-rods is 500 N.展开更多
We are describing a transverse incision that we have found very useful in performing surgical procedures where the fractured site needs freshening, excision of the necrotic bones or shortening. Operative procedures us...We are describing a transverse incision that we have found very useful in performing surgical procedures where the fractured site needs freshening, excision of the necrotic bones or shortening. Operative procedures using this technique have been extensively used by us since 1980 and we have registered 1187 cases with average follow up of 10 years. The incision is transverse and can be performed in any part of leg and extends from 1 cm lateral to anterior border of the tibia and runs medially till 1 cm medial to medial border of tibia. The incision allows adequate visualization of the interested area, less of periosteal stripping, ease of closure, no post operative wound dehiscence and cosmetically very much acceptable.展开更多
文摘AIM: To measure the forces applied during distraction of growing-rods in early onset scoliosis(EOS), aimed at developing a motorized elongation device.METHODS: A consecutive series of measurements were carried out to analyze the forces applied by the surgeon during distraction of single growing-rods in 10 patients affected by EOS(mean age 8.3 years; range 6 to 10 years) undergoing the first distraction 6 months following implantation of the rods. For each measurement, output from the transducer of a dedicated pair of distraction calipers was recorded at zero load status and at every 1 mm of distraction, up to a maximum of 12 mm for each of the two connected rods.RESULTS: Twenty measurements were obtained showing a linear increase of the load with increasing distraction, with a mean peak force of 485 N at 12 mm distraction and a single reading over 500 N. We did not observe bone fractures or ligament disruptions during or after rod elongations. There was one case of superficial wound infection in the cohort.CONCLUSION: The safe peak force carrying capacity of a motorized device for distraction of growing-rods is 500 N.
文摘We are describing a transverse incision that we have found very useful in performing surgical procedures where the fractured site needs freshening, excision of the necrotic bones or shortening. Operative procedures using this technique have been extensively used by us since 1980 and we have registered 1187 cases with average follow up of 10 years. The incision is transverse and can be performed in any part of leg and extends from 1 cm lateral to anterior border of the tibia and runs medially till 1 cm medial to medial border of tibia. The incision allows adequate visualization of the interested area, less of periosteal stripping, ease of closure, no post operative wound dehiscence and cosmetically very much acceptable.
