Objective: To select the optimum alcohol concentration of Shangtong Tincture. Methods: The percutaneous absorption test was performed on excised rats skin in improved Franz diffusion cell. The penetrative amount of paeonol was determined quantitatively by HPLC and the content of paeonol as a marker. Results: The penetrative amount of paeonol of Shangtong Tincture with 60%～80% alcohol concentration have a optimal value, the average rate is 0.010mg/cm 2?h. Conclusion: Shangtong Tincture with 70% alcohol concentration is the best.

[Objective]To study the stresses value and distribution of the facet joint of the normal L4、5 segment model and that of the denucleated lumbar segment model. [Method]A finite element model of the intact L4、5 segment was developed through Ansys software.The property of nucleus pulposus was changed to be negligible to model lumbar discectomy through anterior approach.Then the finite element model of the denucleated lumbar spine segment was created.The inferior end plate of L5 was fixed.Models were subjected to 6 Nm flexion,extension or right rotation moment in combination with 400 N axial compression preload.Forces were applied to the superior L4 end plate.Stresses value and distribution of the lumbar facet joint were analyzed under different loading conditions.[Result]Finite element models of the intact L4、5 segment and the denucleated lumbar spine segment were created.The facet joint was treated as a three dimensional contact,linear frictionless problem.The facet joint was composed of the inferior and superior facet surface and ligamentous structure.Both facet joints,especially the left of the intact model produced larger stresses in right rotation.Comparing with that of the intact model,stresses of the facet joint of the denucleated model increased in flexion,extension and right rotation.[Conclusion]The region of contact of each facet joint varies according to different loading conditions.So does the stresses value and distribution.The facet stresses of the lumbar segment increase in flexion,extension and rotation after discectomy.

Objective To evaluate the variation of the blood flow in anterolateral femoral head by ligating different amount of extracapsular arteries. Methods Thirty six hips of 18 mongrel puppies were divided into A、 B、 C、 D and E groups. In group A, only one peripheral artery was ligated randomly. In groups B, C, D,and E, 2, 3, 4, and 5 peripheral arteries were respectively ligated. The blood flow in anterolateral femoral head in 18 mongrel puppies was measured before and after the ligation of the arteries by using of Hydrogen clearance technique. Results 1) The average blood flow in anterolateral femoral head was (0.1397?0.0515) ml?min-1?ml-1. 2) The mean blood flow in the anterolateral femoral head was slightly decreased after one to two of the extracapsular main arteries were ligated but there was no statistical difference. However, the mean blood flow was decreased significantly after more than three arteries were ligated. Conclusion 1) Hydrogen clearance technique is a quite simple, economic and reliable method for estimation of blood flow perfusion in various tissue. 2) The efficiency of blood supply of the anterolateral femoral head in puppies depends at least upon three of the major extracapsular arteries.

Objective To study a simple?minimally invasive?safe?effective and economical therapy for osteoportic vertebrae compression fracture. Methods 9 patients with 14 vertebrae (13 lumbar, 1 thoracic) suffered from osteoportic compression fractures were treated with percutaneous vertebrolasty from March to September in 2001. The patients included 8 women and 1 man aged from 33 to 85 years with a mean of 72 years. Results All patients had marked to complete pain relief at 1～2 postoperative days, and could get up to move at 2～3 postoperative days. During 1-6 months follow-up period, no pain reoccurred. No severe comlication occurred. Conclusions Percutaneous vertebroplasty provided significant pain relief in the patients with osteoportic vertebrae compression fractures. It is a promising therapy for patients with osteoportic vertebrae compression fracture.

Object To study the condition of Wenpi Decoction (WPD) with being decocted first and later added medicinal materials. Methods Contents of aconitine and free anthraquinone in WPD were determined by HPCE. Results Aconitine could reach the safe limit after Radix Aconiti Preparata being decocted 30 min first and the content of free anthraquinone was the highest after Radix et Rhizomea Rhei being decocted 10 min later. Conclusion Radix Aconiti Preparata should be decocted first and Radix et Rhizomea Rhei should be decocted later in WPD.

Objective To study a new method of kyphoplasty( Sky bone expander system) used to treat the osteoporotic compression fractures of vertebral body. Methods 74 patients with 87 vertebrae were retrospectively analyzed who had been treated with the Sky bone expander system. Based on the Genant' s grading system, 29 vertebrae were rated as Grade One, 41 Grade Two and 17 Grade Three. Both kyphoplasty and posterior internal fixation were done for 16 cases. Of all the cases, 46 were fresh fractures and 28 old. Their average VAS score was 8.7 before operation. Results The mean follow- up time was 8.6 months. All the patients reported significant pain relief. Their average VAS score was 1.4 at the third day after operation (P

Objective: To investigate the effective methods of nutritional support, to improve the endurance for the operation and to promote postoperative recovery in patients undergoing liver transplantation. Methods: The perioperative nutritional condition and nutritional-support methods were reviewed in 33 patients with liver transplantation. In the first 3 postoperative days, parenteral nutrition (PN) was used in combination with infusion of human albumin and plasma. From the 4th to 5th day, enteral nutrition (EN) was used in combination with PN. Finally, the complete oral intake of food was applied. Results: Of 33 patients, there were 30 patients whose serum levels of total protein (TP) and albumin (ALB) were elevated, and glutamic-pyruvic transminase (GPT), total-bilirubin (T-BIL) and combined-bilirubin (D-BIL) were descended after nutrition support. Conclusion: The operative endurance and postoperative recovery were improved effectively by proper nutritional support in liver transplantation patients.

Objective To assess the influences of low-protein diet on the renal function and nutritional status in patients with stage 3/4 chronic kidney diseases (CKD).Methods Totally 34 patients with stage 3/4 CKD were randomly divided into group A (protein intake:0.6 g·kg~(-1)·d~(-1);n=14) and B (protein intake:0.8 g·kg~(-1)·d~(-1);n=20).Anthropometric measurement and blood biochemical tests were performed,nutri-tional status was assessed,and 24-hour dietary recall survey was conducted before and after the treatment.Patients were followed up for 6 months.Results In group A,the creatinine level significantly decreased (P=0.010),while albumin level (P=0.042) and the intake of energy (P=0.018) and carbohydrate (P<0.001) signifi-cantly increased after the treatment In all the 34 patients,in group A and group B,the malnutrition rates were de-creased by 14.7%,7.2%,and 21.1% after nutritional intervention.Conclusion The low-protein diet (protein intake 0.6 g·kg~(-1)·d~(-1)),in which part of the staple food was replaced by wheat starch,can increase the in-takes of carbohydrate and energy and improve renal function and nutritional status in patients with stage 3/4 CKD.

BACKGROUND:A great development has been achieved in essential research on tissue engineered cartilage. However, its real application in otolaryngology has been rarely reported. It is faced with the topic to explore the simple and convenient method of repairing laryngeal cartilage by tissue engineering technique. OBJECTIVE:To compare the effect of porous spongy poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) seeded with chondrocytes or using senior tissue engineered cartilage in repairing al ogenic thyroid cartilage defects.METHODS:Chondrocytes at passage 3 were harvested from infant rabbits within 3 days. Porous spongy poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) seeded with chondrocytes composites were made by tissue engineering technique. The chondrocyte-poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) composites were co-cultured in vitro to form junior tissue engineered cartilage. And then respectively used for repairing the thyroid cartilage defects and directly transplanted with junior tissue engineered cartilage (experimental group A, n=5), or firstly the junior tissue engineered cartilage to be implanted subcutaneously for a period of time to further maturity for relative senior tissue engineered cartilage and secondly to be transplanted (experimental group B, n=5) into adult New Zealand white rabbits. Simple poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) sponge scaffold (control group A, n=4) and chondrocyte suspensions(control group B, n=4) were used as reparative materials in defect areas as control groups. Final y, the reparative effect was respectively studied grossly and histological y at 4 weeks (experimental group B) and 8 weeks (experimental group A, control group A and control group B) after transplantation. RESULTS AND CONCLUSION:The cartilage defects were wel repaired in the experimental groups. It was smooth between the reparative area and original cartilage without dents and defects. Both were similar grossly. But few chondrocytes at interfacial region between the reparative area and original cartilage and poor matrices were observed in the experimental group A. A Few chondrocytes and more matrices were observed in the experimental group B. Inflammatory cellinfiltration was not obvious in two experimental groups. Control groups showed soft tissue of dark-red color accompanied with local concave in gross specimens. Histological examination and special staining showed there were no cartilage-like structure and secretion of matrix components. The results showed that it is possible to repair thyroid cartilage defect using junior tissue engineered cartilage directly or junior tissue engineered cartilage after in vitro implantation in al ograft rabbits with immunity, and the immunoreaction is not obvious;in the same period, the repairing effect of mature tissue engineered cartilage is better than that of junior tissue engineered cartilage. However, application of junior tissue engineered cartilage directly can save time, costs, workload and operational link, and avoid the pain from secondary skin surgery, which is one of the more practical approaches.

Aim To introduce and apply artificial lumbar interverte-brai disc replacement for the treatment of lumbar disc degenerative diseasesand lumbar disc herniation accompanying evident disc space narrowing andinvestigate the regulation of its recovering spinal motion and carrying a-bility. Methods Thirty-one cases (37 discs) of artificial lumbar disc re-placement were performed using SB Charite Ⅲ from April 1998 to April2000. Among them, disc degenerative diseases were in 16 cases (18discs), disc herniation accompanying evident disc space narrowing in 13cases ( 17 discs), rec urrent dise herniation in 2 cases. The rehabilitationtraining was done under postoperative instructions. Results All the caseswere followed up from 17 to 41 months (averagely 26 months) untilSeptember 2001. The clinical outcomes were excellent in 23 cases, goodin 6 cases, fair in 2 cases. The mobility of the operated level had 4.0°anterior flexion and 5. 1° posterior extension after operation and 9.1° ontotal mobility. Meanwhile, the operated intervertebral space got an average4. 2 mm higher than that before. Because of technical problem, a slightdisplacement of the core occurred in one case without any clinical symp-toms and signs. Conclusion Artificial lumbar disc replacement can re-covery spinal motion and carrying capacity and provides a new kind ofoperation for the treatment of lumbar disc degenerative diseases and discherniation accompanying evident disc space narrowing.