Under the operating microscope an experiment of epineurium suture by comparison with perineurium suture was performed in sciatic nerves of 20 rabbits. "Strength-duration curve" of tibialis posterior muscle and axons growth rate of distal myelinated fiber were used as the viewing indexes. The end result was showed that there were no obvious differences between both methods in restoring peripheral nerves function. Funicular orientation by direct stimulation was advocated. A new instrument of measuring "Strength-duration curve" was produced.

The paper first summarizes the major trends and chief features in the current development of imaging medicine and then by focusing on such characteristics of modern imaging medicine as a broad base of specialized knowledge, a wide disciplinary span and rapid equipment and technology development, it dwells on the importance of hospital managers doing a good job of personnel cultivation in modem imaging medicine in such aspects as the integration of medicine, engineering and technology, the combination of medicine, education and research, and the awareness of imaging in a larger sense.

Cerebral ischemia models of rabbits were induced by four-artery obstruction method. The changes of excitatory amino acid (EAA) transmitters,brain-tissue calcium (TCa) and intramitochondria calcium (MCa) of the cerebral cortex were measured and the effects of ketamine were observed. The results revealed that 20 minutes after ischemia,the amoumts of the EAA transmitters (Glu and Asp) in brain tissues were decreased, and decreased further after reperfusion. But after 20 minutes ischemia,the levels of TCa and MCa were elevated and higher than that of ischemia and contral groups significantly after the reperfusion. Ketamine could increase the Glu and Asp contents and decrease the TCa and MCa levels during ischemia and reperfusion.

Object To investigate the synthesis of alkaloids by cell suspension cultures of Datura metel L. Methods Cultured cells derived from leaves of D. metel were m aintained in Murashige and Skoog (MS) liquid medium. The effects of different c arbohydrated, different inoculum sizes, and different pH values of medium as aff ecting facters on cell growth and alkaloid formation were studied. Re sults The optimum carbohydrate was sucrose, inoculum size (1.5 - 2. 0 g/L) for fresh weight and initial pH values (5.5-6.0) of the medium were benefit for cell growth and alkaloid synthesis in the suspension cultures. The synthesis of alk aloids was improved when exogenous phenylalanine added to the culture. Conclusion Suspension-cultured cells of D. metel c an be used to synthesize alkaloids.

Craniocervical unstability may cause severe motor and respiratory compromise due to recurrent upper spinal cord and/or brain stem impingement.In recent years,by improving internal fixation materials and surgical techniques,the methods of surgical treatment of craniocervical unstability has made great progress.With the appearance of these new surgery and internal fixation methods,the successful rate and safety of the operation obviously increased and the complications was reduced greatly.We reviewed the surgery methods for craniocervical unstability in this article.

Pelvic fractures are high energy injuries involving severe trauma and potential intra pelvic bleeding. Immediate control of hemorrhage, fixation of pelvic fractures and inter department cooperation are important for their treatment. Transcatheter angiographic embolization can be used to identify bleeding sites, control hemorrhage and improve mortality and complications, and it has been proved to be a valuable technique in the diagnosis and treatment of pelvic vascular injuries. Still there is a considerable controversy on the fracture patterns, the sequence and the timing of emergency angiography and possible embolization in these patients. In this paper, we reviewed the role of angiographic embolization and we thought more attention should be paid on angiographic embolization in the control of hemorrhage.

[Objective]To study the neurologic criterion and curative effect facts of cervical spondylotic myelopathy.[Method]A prospective study was carried out and 21 cases of cervical spondylotic myelopathy were involved in this investigation to be classified by Nurick grade,JOA score and 40 cent classification.The possibility curative effect facts were analysed.[Result]The patients were followed up for average 11 months.Spinal cord function score were improved by 2~3 grades according to Nurick grade;1～6 cent to JOA score and 7~12 cent to 40 cent postoperation.Height of vertebral,cervical lordosis,centrum posterior decompression being unenough,excess height of centrum were curative effect facts of cervical spondylotic myelopathy.[Conclusion]Nurick classify allow even more contrast,but unsuit to some Cervical spondylotic myelopathy,JOA is simple and convenit,efficienf and across-the-aboard;40 cent assess measure is impersonality but cockamamie.Height of vertebral and centrum posterior decompression being unenough are most important facts about surgery.

[Objective]To evaluate the long-term results of recurrent lumbar disc herniation between different kinds of reoperation.[Method]Seventy-four patients of recurrent lumbar disc herniation after discectomy alone were treated surgically from May 2001 to Augest 2005.They were divided into three groups:nonfusion,posterolateral fusion and intervertebral fusion.After a long term follow-up(≥2y),their clinical data were reviewed to compared their improvement rate of lower back pain,JOA score,subside rate of disc height and chang rate of superior intervertebral space angle.[Result]The long-term results revealed that the improvement rates of lower back pain JOA score in the three groups were increased in sequence.The differences in subside rate of disc height and change rate of superior intervertebral space angle between discectomy and posterolateral fusion groups were insignificant,but much higher than those of posterior lumbar interbody fusion group.[Conclusion]Posterior lumbar interbody fusion is effective in increasing the improvement rates of lower back pain JOA score and maintaining the disc height and the superior intervertebral space angle.

Sixty-eight patients with a surgically proven lumbar stenosis associated with disc protrusion were studied retrospectively. According to the essential clinical feature the patients were divided into three groups: Group 1, intermittent claudication (n=21), Group 2, low back pain associated with unilateral aciatic pain (n=42), and Group 3, intermittent claudication coexisting with bilateral or unilateral leg pain (n=5). The final diagnosis prior to operation was difficult to make. Surgical decompression of the spinal canal required removal of the portion of hypertrophied superior articular faced and prolapsed disc. Fifty-eight patients were followed up from 6 months to 6 years and 3 months. In 41 patients preoperative neurogenic symptoms completely disappeared, 14 still an occasinal bachache, existed and 3 moderate symptoms persisted postoperatively.

Using the model of the rabbit brain ischemia the intracellular calcium accumulation and ultrastructure alteration of cerebral cortex were observed. The results indicated that the longer the ischemia reperfusion time,the more was the calcium accumulation and ultrastructure alteration in cerebral cortex. It is revealed that calcium plays an important role in the brain Injury induced by ischemia-reperfusion. The mechanism of brain injury related to calci- um was diseussed.