Objective： To compare the mechanical properties of point contact-dynamic compression plate （PC-DCP） and its effects on cortical bone perfusion with that of dynamic compression plates （DCP） in goat tibiae. Method...Objective： To compare the mechanical properties of point contact-dynamic compression plate （PC-DCP） and its effects on cortical bone perfusion with that of dynamic compression plates （DCP） in goat tibiae. Methods： Twenty pairs of matched flesh goat tibiae were used. A transverse fracture model was established. The fractures with a 3ram interspace between the fracture ends were subject to fixations with the DCPs and the PC- DCPs respectively, then the four-points bending tests and the torsion tests were conducted to compare the mechanical properties of the PC-DCP with that of DCP. Another 13 sexually mature goats underwent fixations with the DCPs and the PC-DCPs, respectively, at the mid-shafts of the intact bilateral tibiae. Ischemic zones were observed at four time points （1 day, 2, 6, and 12 weeks after operation） using disuiphine blue staining technique. Remits： There were no significant differences in mechanical properties, such as bend- and torsionresistance, between the DCPs and the PC-DCPs. One day, 2, and 6 weeks after operation, on the side of DCP fixation, outer cortical bone ischemia under the plate persisted, and this condition did not reverse until 12 weeks after operation. However, on the side of PC-DCP fixation, cortical bone iscbemia occurred only in the periphery of the screw holes and at the contact sites of the PC NUTs 1 day after operation, and it disappeared at 2 weeks after operation. Conclusions： The PC-DCP has similar biomechanical properties of the DCP, but is less detrimental to local bone blood circulation than the conventional plates.展开更多
Subclavian vascular injury accounts for 1%-5% of all vascular injuries. If not found in time or managed swiftly, subclavian vascular injury is likely to cause hemorrhagic shock and even death. From March of 1998 throu...Subclavian vascular injury accounts for 1%-5% of all vascular injuries. If not found in time or managed swiftly, subclavian vascular injury is likely to cause hemorrhagic shock and even death. From March of 1998 through August of 2003, a total of 15 cases with subclavian vascular injury were treated in our department. The details are described in this report.展开更多
文摘Objective： To compare the mechanical properties of point contact-dynamic compression plate （PC-DCP） and its effects on cortical bone perfusion with that of dynamic compression plates （DCP） in goat tibiae. Methods： Twenty pairs of matched flesh goat tibiae were used. A transverse fracture model was established. The fractures with a 3ram interspace between the fracture ends were subject to fixations with the DCPs and the PC- DCPs respectively, then the four-points bending tests and the torsion tests were conducted to compare the mechanical properties of the PC-DCP with that of DCP. Another 13 sexually mature goats underwent fixations with the DCPs and the PC-DCPs, respectively, at the mid-shafts of the intact bilateral tibiae. Ischemic zones were observed at four time points （1 day, 2, 6, and 12 weeks after operation） using disuiphine blue staining technique. Remits： There were no significant differences in mechanical properties, such as bend- and torsionresistance, between the DCPs and the PC-DCPs. One day, 2, and 6 weeks after operation, on the side of DCP fixation, outer cortical bone ischemia under the plate persisted, and this condition did not reverse until 12 weeks after operation. However, on the side of PC-DCP fixation, cortical bone iscbemia occurred only in the periphery of the screw holes and at the contact sites of the PC NUTs 1 day after operation, and it disappeared at 2 weeks after operation. Conclusions： The PC-DCP has similar biomechanical properties of the DCP, but is less detrimental to local bone blood circulation than the conventional plates.
文摘Subclavian vascular injury accounts for 1%-5% of all vascular injuries. If not found in time or managed swiftly, subclavian vascular injury is likely to cause hemorrhagic shock and even death. From March of 1998 through August of 2003, a total of 15 cases with subclavian vascular injury were treated in our department. The details are described in this report.
