OBJECTIVETo observe the immune response after the transplantation of a deproteinized heterogeneous bone scaffold and provides the theoretic reference for clinical practice.

METHODSThe fresh pig bone and deproteinized bone were transplanted respectively to establish BABL/C thigh muscle pouches model of male mice and take the samples for detection at 1, 2, 4, 6 weeks after operation. Lymphocyte stimulation index, subset analysis, serum specific antibody IgG, cytokine detection and topographic histologic reaction after implantation were investigated.

RESULTSAfter the transplantation of deproteinized bone, lymphocyte stimulation index, CD(4)(+) and CD(8)(+) T-lymphocyte subsets, serum specific antibody IgG and cytokines in deproteinized bone group were significantly lower than those in fresh pig bone group at each time point (P<0.05). The histological examination found that in fresh bone group at each time point, a large quantity of inflammatory cells infiltrated in the surrounding of bone graft, and they were mainly lymphocytes, including macrophages and monocytes. In deproteinized bone group, there were few inflammatory cells infiltration around bone graft one week after operation. The lymphocytes were decreased as time went by. At 6 weeks, fibroblasts and fibrous tissue grew into the graft, and osteoclasts and osteoprogenitor cells appeared on the verge.

CONCLUSIONSThe established heterogeneous deproteinized bone has low immunogenicity and is a potentially ideal scaffold material for bone tissue engineering.

Animals ; Bone Transplantation ; immunology ; Male ; Mice ; Mice, Inbred BALB C ; Swine ; Tissue Engineering ; methods ; Tissue Scaffolds ; Transplantation, Heterologous

Objective To investigate the efficacy of erythropoietin (EPO) on cerebral ischemia of patients after intracranial aneurysm surgery.Methods Sixty patients with cerebral ischemia after operation of intracranial aneurysm,admitted to our hospital from May 2006 to August 2010,were randomly divided into control and treatment groups (n=30).Control group received conventional treatment,while the other group,on the basis of conventional therapy,was hypodermically given EPO at a dosage of 3000 IU for a consecutive 3 days.U.S.National Institutes of Health Stroke Scale (NIHSS) was used to score the patients on the admission day,1,2,3,4 and 5 weeks after EPO treatment; and diffusion-weighted imaging (DWI) of MRI was used in determining the changes of cerebral ischemic area on the ischemic day and l,2,3,4 and 5 weeks after ischemic.Results NIHSS scores of the EPO group (9.4±1.9,11.3±2.3,8.7±1.7) at 3,4 and 5 weeks after treatment were significantly higher as compared with those in the control group (10.8±2.2,7.9±1.6,10.1±2.3) (P＜0.05).Similarly,3,4 and 5 weeks after treatment,the reducing percentage of cerebral ischemia area in the EPO group (21.6±4.1,27.5±5.3,32.8±5.5)％ was larger than that in the control group (16.8±3.1,18.9±3.3,19.5±3.4)％ (P＜0.05).Conclusion EPO may play an effective role in cerebral ischemia of patients after intracranial aneurysm operation.

OBJECTIVETo observe clinical results for reconstruction of periprosthetic fractures of hip with cortical bone plates allografts by deep-freezing and ethylene oxide treatment.

METHODSSeven patients with periprosthetic fractures of hip underwent cortical bone plates allografts by deep-freezing at -70 degrees C after being treatment of 48 degrees C ethylene oxide. And evaluate clinical outcome by examining T lymphocytes, Harris scores, X-rays photograph, and bone scintigraphy.

RESULTSThere were not activity of immune rejection and infection in all patients. Harris scores of patients increased 21, 32, 40, 40 scores at 3, 6, 12, 24 months after surgery. T-lymphocytes, antibody and immunocomplex in blood was normal postoperation. X-ray film indicated that fracture was healed at 3 months and there was partially bone conjunction between allograft strut and host bone. There was incorporation of 85% allograft strut to host bone, and 15% allograft strut was partially absorbed at 12 months after surgery. The size of femur of host was added 3 mm to 5 mm, averaged 4.3 mm at 12 months postoperation. Density of 80% allograft plates was as same as host bone after remodeling and the absorbtion of 10% allograft plates stopped at 24 months after surgery. There was thick of nuclein in the area of allograft cortical bone plates by bone scintigraphy examination at 3 months postoperation, and the thick of nuclein was stronger at 6, and 12 months after surgery.

CONCLUSIONAllograft cortical bone plates by deep frozen at -70 degrees C after being treatment of 48 degrees C ethylene oxide is suitable for mechanical fixation and biological bone transplantation, and it can increase bone reservation, augment strength of femur once the allograft strut incorporates to host bone, and avoid removing metal implant in second operation when being applied into reconstruction femoral fracture in joint replacement.

Aged ; Arthroplasty, Replacement, Hip ; adverse effects ; Bone Plates ; Bone Transplantation ; methods ; Female ; Follow-Up Studies ; Hip Fractures ; etiology ; surgery ; Humans ; Male ; Transplantation Conditioning ; methods ; Transplantation, Homologous

OBJECTIVETo evaluate the patients with bone injury in Wenchuan earthquake.

METHODSFrom May 12th to June 15th 2008 the data of 1410 patients with bone injury in Wenchuan earthquake were analyzed to evaluate clinical intervention and remedy-managing experience.

RESULTSThe 1410 patients average age was from 4 to 103 years old. And 744 cases (52.7%) suffered from blunt injuries, 379 cases (26.9%) from buried injuries, 287 cases (20.4%) from falling injuries; And 1317 cases were with fracture, 93 with limbs soft tissue injuries; 261 patients combined with other parts of injuries including 45 cases with paralysis; 66 cases were with crush syndrome, 25 with gas gangrene, 76 with acute kidney failure, 26 with multiple organ failure. And 912 operations were performed including 402 fracture fixation, 224 debridement, 152 debridement and suture, 85 amputation, 29 implant skin, 8 fixation of joint dislocation, 5 surgical flaps transplantation, 4 nerve and tendon suture, 2 arthroscopes, 1 joint replacement. Among the 66 crush syndrome patients, 49 accepted continuous renal replacement therapy, in which 9 cases were bleeding from named arteries and 20 blood vessels were getting embolism. Among the 1410 cases, 1 died from multiple organ failure.

CONCLUSIONSAmong the patients with bone injury in Wenchuan earthquake, the elderly patients are more than the youth; The injuries are always combined with other complications; Opened injuries are polluted severely; It is difficult to deal with the crush syndrome; Paraplegia cases are less, but the amputees are more.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Child ; Child, Preschool ; Earthquakes ; Female ; First Aid ; Humans ; Male ; Retrospective Studies ; Wounds and Injuries ; surgery