Object To establish and optimize the technology of clonig rapid propagation by tissue culture in Scutellaria baicalensis Georgi for the protection and development of nature resource as well as seeking for new breeding way of S. baicalensis by biotechnology. Methods Research on the optimized technology of tissue culture including callus inducing, differentiation, plantlet propagation, and rooting were designed. Results Callus could be induced from nodes and internodes easily with 100% inducing rate compared with that from leaves. PP 333 has significant stocky effect to the plantlets. Conclusion The nodes are good explant source in inducing callus. PP 333 in certain concentration which is added to culture media could improve and regulate the differentiation of callus and growth of plantlets as well as increase the survival rate of cultivated seeding.

Objective: To evaluate the role of the deep radioulnar ligament in the stability of the distal radioulnar joint (DRUJ).Methods: In the study, 14 fresh cadaver upper extremities were randomly divided into two groups.After exposuring the palmar and dorsal deep distal radioulnar ligament, one group was marked as palmar deep radioulnar ligament, and the other group was marked as dorsal deep radioulnar ligament.The pronator teres and the supinator were exposed.A Kirschner wire perpendicular to the bone on Lister tubercle of radius was inserted, then another Kirschner wire on the same level of ulnar inserted when the forearm was in neural position, which was kept parallel to the first Kirschner wire.These specimens were mounted on a specially designed jig which held the limb rigidly, keeping the elbow fle-xion and the ulnar fixation.The radius could freely rotate around the ulnar.Then 50 N force on the pronator teres was applied to simulate the active pronation, and 60 N force on the supinator to simulate the active supination.The active pronation was stimulated, and the displacement of the distal radius was measured with respect to the ulna.The active supination was atimulated, and the displacement of the distal radius was measured with respect to the ulna.The palmar deep radioulnar ligament in one group was cut, then the displacement of the distal radius measured with respect to the ulna when the forearm was in pronation and supination.The dorsal deep radioulnar ligament in the other group was cut, and the displacement of the distal radius measured with respect to the ulna when the forearm was in pronation and supination.Results: After resection of the palmar deep radioulnar ligament, the displacement of the distal radius with respect to the ulna was statistically significantly different when the forearm was in pronation (t=5.591, P=0.001), but there was no difference when the forearm was in supination (t=0.433, P=0.680).After resection of the dorsal deep radioulnar ligament, the displacement of the distal radius with respect to the ulna was not different when the forearm was in pronation (t=1.000, P=0.356), but there was statistically significant difference when the forearm was in supination (t=6.225, P=0.001).Conclusion: DRUJ is unstable when the forearm is in pronation after resection of the palmar deep ra-dioulnar ligament, and DRUJ is unstable when the forearm is in supination after resection of the dorsal deep radioulnar ligament.

Objective To introduce the method, indications and the usage of abdominal double layer subcutaneous flap for the repair of late complicated hand injury. Methods A new type of flap was designed to repair the complicated hand injury. Sixteen cases were treated with this method since 1998. Results The duration of the follow up ranged from 3 to 24 months with an average of 13 months. All of the flaps survived well. After physiotherapy, the overall excellent and good rate of joint movement was 80%(TAM standard). No further surgery was required in all of the cases. Conclusion The abdominal double layer subcutaneous flap was especially indicated in those cases with bone nonunion, tendon and nerve defect and tendonous adhesions. This kind of flap not only provide a good skin covering, but also offer a soft bed for the tendons, nerves, and bones.

Objective:To investigate the validity and the outcome of a new surgery method that utilizes lateral great toe flap to decoratively reconstruct the thumb pulp loss.Methods:From Jan.2009 to Jan. 2014 , 22 cases with unilateral thumb pulp defect were included, for whom, lateral great toe flap was de-ployed to reconstruct the thumb.Blood circulation was re-established by the anastomosis of the digital vessels of toes and fingers in 18 cases, the other 4 cases were conducted by a dorsal metatarsal artery and vein anastomosed to the deep branch of the radial artery and the dorsal metacarpal vein respectively; as for the nerve repair, toe-to-finger digital nerve anastomosis was performed.The donor sites were covered by full-thickness inguinal skin grafts.Results:All the 22 flaps survived without complications.With 6 to 12 months follow-up, the surviving fingers all presented aesthetically pleasant appearance with vivid loops and whorls.Normal functions like sweating were restored as well, and the two-point-discrimination ranged 3.0 to 6.0 mm (4.2 mm in average).The skin grafts to the donor sites healed uneventfully, the appearance and functions of the feet were unaffected.Conclusion: Lateral toe flap should be the first-line choice for reconstructing thumb defect, as it conveniently restores both functions and outlook.

Objective:To investigate the outcomes of applying microvascular anastomotic coupling de-vices in solitary upper extremity artery injury repairs and to optimize parameters for optimal clinical out-come.Methods:From March to September 2013,19 injured arteries from 18 male patients who presen-ted at Department of Hand Surgery,Beijing Jishuitan Hospital with traumatic arterial lacerations of their upper extremities went through rapid repair procedures.COUPLER,a microvascular anastomotic coupling device was applied in these artery injury repair operations.The 19 repaired arteries included 3 brachial arteries,6 ulnar arteries and 10 radial arteries.After the procedures,all the 18 patients were then fol-lowed up by clinical specialists and examined with color doppler flow imaging for the effective recovery of artery circulation and upper extremities functionality.Results:The average time of artery repairs for all the 19 damaged arteries among the 18 patients was 278 s and the average follow-up time was (71.5 ± 40.9)d with the longest follow-up time as 116 d and shortest as 14 d.No patient returned to the opera-ting room after the procedures and after being dismissed from the hospital.None of the 18 cases were re-ported to have problems with circulation and thrombosis formation in their upper extremities.Color Doppler imaging showed that the arterial anastomotic site for all the 19 repaired arteries were unobstructed with artery blood spectrum at both ends.Three patients with radial artery repairs complained about mild pressure pain at the site of vascular anastomosis;while the other 15 patients all expressed satisfactory outcomes of the surgery and recovery.These evidences indicated that the outcomes of our initial evalua-tion for the solitary upper extremity artery injury repairs by using anastomotic coupling devices were posi-tive.Conclusion:Our observations have showed that microvascular anastomotic coupling devices can be used for repairing of solitary upper extremity artery injures.The procedures are quick,effective and safe. The clinical application of this microvascular anastomotic coupling device in artery injures is promising, however,additional evidences through further clinical investigation with more cases are warranted.

Objective To investigate the radiographic outcomes of dorsal intercarpal ligament capsulodesis (DILC) and three-ligament tenodesis for chronic scapholunate dissociation,and to determine its recurrence rate and time after operation.Methods From January 2008 to January 2011,23 patients with chronic scapholunate dissociation were treated in our hospital.Among them,19 patients underwent DILC and 4 underwent three-ligament tenodesis.The average duration of follow-up was 10.1 months.The clinical and radiographic outcomes were recorded preoperatively,at 1 month after pin removal,and at final follow-up.The VAS and DASH questionnaire were used to assess the pre-and post-operative pain,improvement of function and degree of patient satisfaction,respectively.Results The radiographic outcome showed that the abnormal carpal alignment was reduced completely in all patients during operation.At 1 month after pin removal,the mean scapholunate gap was 4.0 mm,and average scapholunate angle was 75°.Compared with those before operation,the scapholunate gap and scapholunate angle were improved.At final follow-up,the mean scapholunate gap was 4.3 mm,and the mean scapholunate angle was 78°; they were worse compared with those at 1 month after pin removal,while there was no statistical difference in both results.The other three radiographic results at final follow-up remain unchanged.The wrist flexion,wrist extension and grip strength decreased from preoperative 66％,69％ and 71％ of the contralateral side to postoperative 52％,50％ and 66％ of the contralateral side.Conclusion Soft tissue reconstruction cannot withstand the large and repetitive forces.Carpal collapse recurs in a short time after dorsal capsulodesis and three-ligament ten-odesis,which mostly happens in 1 month after pin removal.The best way to treat scapholunate dissociation is still unknown.

Objective To evaluate the preliminary clinical outcome of the screw fixation of minimally displaced scaphoid fracture assisted by computerized imaging reconstruction and preoperative planning system.Methods From March 2013 to Feburary 2014,Five screws on five patients were treated.We calculated and designed the position of scaphoid screw guide wire and ensured the guide wire centrally placed in the scaphoid by using the computerized imaging reconstruction and preoperative planning system software.The appropriate length of the screw was measured too in the software.We also identified the entry and exit points of the guide wire on the custom orthoses splinting the wrist joint.Five patients with scaphoid fractures were treated with percutaneous screw fixation under the guidance of a C-arm fluoroscopy and a guide wire were inserted based on the entry and exit points calculated preoperatively.All of the scaphoid fracture was nondisplaced or less than 1 mm.The modified MAYO wrist scoring system was used to evaluate the pain,function and range of motion for the wrist joint during follow up.Results Total surgical time was 28.8 min (25-39 min)and Fluoroscopy time was 18.4 s (11-23 s).The fracture healing was observed at routine 8 weeks follow up.No complication such as infection or fixation failure was reported.Modified MAYO wrist score was 83.8 (81-88)at average followup at 15 months (6-12 months).Conclusion Computer assisted percutaneous screw fixation is an effective method for the treatment of nondisplaced scaphoid fractures.It leads to significantly reduced guidewire placement time and radiological exposure time while provides accurate placement of the screw.

Objective To find out the optimal supercritical CO2 fluid extr ac tion prosess for Tetrahydropalmatine. Methods The extraction process was optimiz ed by orthogonal design with the yield of Tetrahydropalmatine as markers. Three factors including extraction pressure, temperature and the volume of entrainer were observed. Results The optimal condition of supercritical CO2 fluid extrac tion process was: under the pressure of 15Mpa at 40 ℃ , 1.5 fold of 95 % EtO H with Corydalis yanhusuo W.T.Wang as the entrainer. Conclusion The optimal supe rcritical process is feasible, with the advantage of low temperature and energy consumption, short time, high production and no organic residua.

Objective To observe the imaging features of intraosseous ganglion of the wrist. Methods The radiographs (6 cases), CT (4 cases), and MR (1 case) in 6 cases (7 lesions) of surgically confirmed intraosseous ganglion were retrospectively reviewed. Results Typical intraosseous ganglion was seen as sharp margined and cystic lesion with the size of approximately 0.5 cm in diameter. All but one lesion showed no communication with joint. No degenerative changes were seen in the joints nearby. CT was able to depict the lesions better than radiographs in 4 cases. Intraosseous ganglion was seen as slight low signal on T 1WI and slight high signal on T 2WI MR images. Conclusion Intraosseous ganglion was typically seen as sharp-margined and cystic lesion on radiographs, and it could be better demonstrated with CT and MR. With typical imaging appearance, a suggestion to the diagnosis of intraosseous ganglion could be made.

Objective:To evaluate the outcomes of lesser arc perilunate injuries (Perilunate disloca-tions)treated with arthroscopically assisted mini-invasive reduction and fixation.Methods:Between 2012 and 2014,5 patients who had a perilunate dislocation were treated with arthroscopically assisted re-duction and percutaneous fixation.The mean follow-up was 17.8 months (range,10 to 32 months). Clinical outcomes were evaluated on the basis of range of motion;grip strength;Mayo wrist score;Quick disabilities of the arm,shoulder and hand questionnaire;and patient-rated wrist evaluation score.Radio-graphic evaluations included carpal alignments and any development of arthritis.Results:The range of flexion-extension motion of injured wrist averaged 84% of the values for contralateral wrist.The grip strength of the injured wrist averaged 90% of the values for the contralateral wrists.The mean Quick Disabilities of the arm,shoulder and hand score was 1 ,and the mean Patient-Rated Wrist Evaluation score was 5 .According to the Mayo wrist scores,the overall functional outcomes were rated as excellent in all the patients.Reduction obtained during the operation was maintained within normal ranges in all the patients.Arthritis had not developed in any patient at the end of the follow-up.Conclusion:Arthroscopic mini-invasive reduction with percutaneous fixation is a reliable and favorable alternative in the treatment of perilunate dislocations according to our early results.