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대퇴골두 무혈성 괴사에 대한 혈관부착 비골 이식술 후 디지털 감산 혈관조영술 소견
이기행,김윤수,이해규,옥지훈,김배균,김형민,Lee, Kee-Haeng,Kim, Youn-Soo,Lee, Hae-Giu,Ok, Ji-Hoon,Kim, Bae-Kyun,Kim, Hyoung-Min 대한미세수술학회 2004 Archives of reconstructive microsurgery Vol.13 No.2
Purpose : To observe the patency of anastomosis site and the findings of circulation of grafted fibula in osteonecrosis of femoral head treated with vascularized fibular graft by use of digital subtraction angiography. Materials and Methods : 17 cases of 11 patients who underwent vascularized fibula graft for osteonecrosis of femoral head. We performed digital subtraction angiography(DSA) for them at second week postoperatively in 12 cases, at sixth week in 1 case, at sixth month in 2 cases, at twelfth month in 1 case, and eighteenth month in 1 case which had been got DSA at second week before. We observe the patency of pedicle, and the circulation of grafted fibula such as periosteal and intraosseous vessels with time. Results : All cases except one which were thought failure of selective angiogram showed good passage of blood flow through anstomosed pedicle on DSA. We found the differences in appearance of circulation of grafted fibula with time. DSA at 2nd and 6th week postoperatively revealed both of periosteal and intraosseous vessels along the fibula and blood pooling at the tip of fibula. DSA at 6th month showed maintenance of periosteal and intraosseous vessels along the fibula but did not clearly reveal blood pooling at the tip of fibula. The findings of DSA at 12th and 18th month were similar each other. The periosteal vessels were not seen as the grafted fibular bone were incorporated into surrounding femoral bone but intraosseous vessels were still seen. Conclusion : It was thought that DSA could be used for evaluation of the status of pedicle including anastomsed site and vessels of grafted fibula with time. The periosteal vessels of fibula were decreased with time but intraosseous vessels were still seen until 18th month after vascularized fibula graft.
기계적 합금화에 의해 제조된 비정질 Ni-Ti 합금의 단거리 규칙성
김배균,이덕열 고려대학교 공학기술연구소 1990 고려대학교 생산기술연구소 생기연논문집 Vol.26 No.1
Amorphous Ni_(35)Ti_(65), Ni_(40)Ti_(60), Ni_(50)Ti_(50) and Ni_(60)Ti_(40) alloy powders were produced by mechanical alloying of elemental powders. Structural analysis was carried out for the mechanical alloy powders based on the X-ray diffraction experiments made using Ag Kαradiation (λ= 0.56 Å). The short-range atomic distribution in the mechanically alloyed Ni_(35)Ti_(65) and Ni_(40)Ti_(40) was found to be similar to that in the amorphous alloys of the same composition prepared by liquid quenching. The total interference functions of the Ni_(50)Ti_(50) and Ni_(60)Ti_(40) mechanical alloys have the prepeak at K∼1.9Å^(-1) like the other two alloys but, when compared with those synthesized from the partial functions of the amorphous Ni_(40)Ti_(60) alloy, they are similar in shape but somewhat out of phase.