Objective To observe the clinical effects of vitrectomy for advanced retinopathy of prematurity (ROP) and evaluate influence factors of anatomical recovery for stage 5 ROP.Methods Fiftyeight eyes of 40 infants with advanced ROP who underwent vitrectomy were retrospectively analyzed.There were 16 eyes of stage 4a,7 eyes of stage 4b,and 35 eyes of stage 5 ROP.Eighteen eyes received laser photocoagulation,2 eyes received cryotherapy,and 11 eyes received intravitreous injection of Bevacizumab (IVB) before surgery.The average follow-up time was 17.01 months.Anatomical outcome of retina after surgery was recorded by indirect ophthalmoscope and RetCam Ⅱ digital camera system.Visual outcome was measured by grating acuity test(lea gratingTM),and was converted to Snellen acuity values for analysis.For those who cannot cooperate to accomplish the test,we use hand move,light perception and non-light perception to record visual outcome. Results All 16 eyes of stage 4a were anatomically recovered (100.00％).5/7 eyes of stage 4b were anatomically recovered (71.43％) and 2/7 eyes were anatomically failed(28.57％).12/35 eyes of stage 5 were anatomically recovered (34.29％); 10/35 eyes were partial anatomically recovered (28.57％); 13 eyes were anatomically failed (37.14％). Anatomical outcome of stage 4a or 4b was better than stage 5 statistically(x2 =22.55,P＜0.05).Of 16 eyes of stage 4a,3 eyes were absent for visual function test.In the rest 13 eyes of stage 4a,VA of 6 eyes (46.15％) was between 0.03 and 0.07; 5 eyes (38.46％) were hand move; 2 eyes (15.39％) were light perception.Of 7 eyes of stage 4b,2 eyes (28.57％) accomplished grating acuity test with VA of 0.008 and 0.017 respectively; 1 eye (14.29％) was hand move; 2 eyes (28.57％) were light perception; 2 eyes (28.57％) were non-light perception.Of 35 eyes of stage 5,5 eyes were absent for visual function test.In the rest 30 eyes of stage 5,VAof2 eyes (6.67％) was 0.004; 4 eyes (13.33％) were hand move; 12 eyes (40.00％) were light perception; 12 eyes (40.00％) were non-light perception.Visual outcome of stage 5 was worse than stage 4a or 4b statistically(x2=15.734,P＜0.05).There was no statistically significant relationship between anatomical outcome and birth weight,gestational weeks,age at surgery,IVB therapy,laser or cryotherapy before surgery.Conclusions Vitrectomy can effectively control the lesions progress of stage 4a ROP,and achieve partially anatomically recovery of some stage 4b/5 patients.There was no statistically significant relationship between anatomical outcome and birth weight,gestational weeks,age at surgery,IVB,laser or cryotherapy before surgery.

Objective To investigate the anatomic characteristics of hepatopancreatic artery(HPA) by DSA and its significance in preventing pancreatic complications after transcatheter arterial chemoembolization(TACE) in patients with hepatocellular carcinoma.Methods 1 000 cases of hepatic arteriograms have been retrospectively reviewed. The aberrant pancreatic arteries that originate from proper hepatic artery(PHA) and all distal intrahepatic branches to PHA were called hepatopancreatic arteries. The incidence of HPA has been summed up and its anatomic characteristics such as origine, course, branches and distribution have been described. Results Of 1000 cases, HPA were found in 16 cases(1.6%). There were 2 branches of HPA in one case and there was only one branch of HPA in other 15 cases. Altogether 17 branches of HPA were found; of which, 7 branches originated from PHA(41.2%,7/17), 6 branches arose from right hepatic artery(RHA)(35.3%,6/17) and 4 branches came from left hepatic artery(LHA)(23.5%,4/17). Conclusions HPA is a kind of rare variations of pancreatic artery. The importance to avoid embolizing HPA during TACE is preventing pancreatic complications.

Objective To study the characteristics of hepatogastric artery (HGA) with DSA and its clinical significance in transcatheter arterial chemoembolization (TACE) in patients with hepatocellular carcinoma. Methods One thousand cases of hepatic DSA arteriograms had been retrospectively reviewed. The aberrant gastrointestinal arteries that originated from proper hepatic artery (PHA) or distal intrahepatic arteries to PHA were named HGA. Furthermore, according to their different courses and distributions, HGAs were subdivided into right gastric artery (RGA), aberrant left gastric artery (AbLGA), aberrant gastroduodenal artery (AbGDA), aberrant right gastroepiploic artery (AbRGEA), superior duodenal artery (SDA) and other difficult-to-named HGA. The incidence of each of them had been summed up and their anatomic characteristics such as origin, course, branches, and distribution had been described. Results Of the 1000 cases, at least one branch of HGA was found in 740 cases (74%), and altogether there were 839 branches of HGA in them. The composition of 839 branches of HGA was as follows: 682 branches of RGA (81.29%, 682/839), 84 branches of AbLGA (10.01%, 84/839), 45 branches of SDA (5.36%, 45/839), 21 branches of AbGDA (2.50%, 21/839), 1 branch of AbRGEA (0.12%, 1/839) and 6 branches of difficult-to-named HGA (0.72%, 6/839). Of the 839 branches of HGA, 412 branches originated from PHA (49.11%, 412/839), 314 branches from left hepatic artery (LHA)(37.43%, 314/839), 98 branches from right hepatic artery (RHA)(11.68%, 98/839), and 15 branches from middle hepatic artery (MHA)(1.79%, 15/839). Conclusion HGA is a common gastrointestinal arterial variation and it is very important to be familiar with it so as to prevent the gastrointestinal complications after TACE in patients with hepatocellular carcinoma.

Objective To evaluate the CT findings of the parotid basal cell adenoma and it's diagnostic value.Methods The CT appearances of 10 patients with parotid basal cell adenoma confirmed by histopathology were reviewed retrospectively.The plain and the contrast-enhanced CT scan were performed in all cases.Results The well-defined mass in varied size with marked enhancement in contrast-enhanced CT imagines,in which the CT value increased to 200Hu maximally(average,84Hu),were the pathognomonic CT characteristics of the parotid basal cell adenoma.Conclusion The qualitative diagnosis of the parotid basal cell adenoma could be made based on the CT findings combined with some valuable clinical information before operation.

Objective To study the anatomic characteristics of hepatogastric artery(HGA) and its significance in preventing gastrointestinal complications in patients with hepatocellular carcinoma after transcatheter arterial chemoembolization(TACE).Methods 1000 cases of hepatic arteriograms were retrospectively reviewed,the aberrant gastrointestinal arteries that originate from proper hepatic artery(PHA)and distal intrahepatic arteries to PHA were named HGA.The frequency,origine,course and distribution of all of HGAs were carefully analyzed.The trial group consists of 34 cases(42 times of TACE)who had HGA and controlled group consists 32 cases(56 times of TACE)who had no HGA.The incidence of gastrointestinal complications after TACE between two groups were compared.Within trial group,superselective catheterization was made and had the tip of catheter away from orifice of the HGA before infusion of embolic agents(Lipiodol)during TACE in 18 times,which was called relative safety group;whereas,the tip of catheter was not laid distal to orifice of HGA when infused Lipiodol through catheter in 24 times,which was called dangerous group.The incidence of complications between this two groups was also compared.Results Of 1000 cases of hepatic arteriography,HGA was found in 740 cases (74%).The incidence of gastrointestinal complication and its grave degree in trial group were more excessive than that in controlled group((?=0.004),similarly,the frequency of gastrointestinal complication and its graveness in dangerous group exceeded significantly that in relative safety group((?=0.000).Conclusion HGA is common vascular variation.That embolic agents (Lipiodol)was perfused carelessly into HGA may induced occurrence of gastrointestinal complications in patients after TACE,and having the tip of catheter away from the orifice of HGA by superselective catheterization during TACE could efficiently prevent happening of this kind of complications after operation.

Objective To investig ate the expression of Schwann cell derived fa ctor （SDNF） in normal or under the condi tion of different injuries on the sciati c nerves of rats. Methods Sevent y-five S D rats were divided into three groups ac cording to different injuri es including transection， transection fo llowed by epineurial suture， and crush. Ten normal rats were treated as control. T he immunohistochemistry of both sciatic nerve and spinal cord were performed at 5，7，14，30，60 days after operation respec tively. Result （1）lower levels o f SDNF were detected in normal sciatic nerve， t he whole white matter and the laminae Ⅲ～ Ⅴ of dorsal horn of spinal cord. （2）In g roup transection， the SDNF levels reache d a maxium at 14 days after operation in proxi mal segment， at 7 days in distal segment ， and at 5 days in spinal cord. There ap peared a highest expression in related t issue of both group crushing and group s uturing at 60 days after operation. （3）SD N F staining of dorsal horn ipsilateral to the nerve lesion was stronger than that of contralateral. There was a transient expression in spinal motor neurons ipsi lateral to nerve lesion at 5 days in gro up crushing and group transection and at 30 days in group suturing. Conclusi on （1）There is a weaker expression i n norma l sciatic nerve and spinal cord. （2）The expression of SDNF varies with the diffe rent nerve lesions. （3）Significant quant ities of SDNF are released from Schwann cells after nerve lesion， and SDNF is then available to the axon of the lesioned neurons which may promote neuro n repair.

[Objective]To explore the effect of fracture healing with intramedullary nail of poly-DL-lactic acid(PDLLA) mixed with chitosan and basic fibroblast growth factor(b-FGF),and provides the basis for clinical application.[Method]Middle tibia fracture model of 120 healthy adult rabbits of New Zealand were established and randomly divided into 6 groups as follows:experimental(A):30 rabbits with PDLLA+CHS+ b-FGF;control:5 groups(18 animals for each group):control(B) with PDLLA+CHS,control(C) with PDLLA,control(D) with PDLLA+b-FGF,control(E) with Kirschner's wire,and control(F) with Kirschner's wire+b-FGF.Radiological and histological follow-up was performed in 4,8,12 weeks postoperatively.[Result]All animals were survival.There was no significant difference(P

Objective To analyze the influence factors of complications in CT-guided percutaneous pulmonary biopsy,and to explore the optimal methods of operation.Methods Totally 410 patients who underwent CT-guided percutaneous pulmonary biopsy were retrospectively analyzed,and the complications of biopsy were observed.Results Pulmo-related complications occurred in 54 patients (54/410,13.17%) ,including pneumothorax in 18 patients (18/410,4.39%) ,1 of them had pneumothorax and pulmonary bleeding around the needles in 35 patients (35/410,8.54%) ,15 of which with haemoptysis (15/410,3.66%) ,and 1 patient had acute pleura reaction.No severe complications such as infection.excessive bleeding,hemothorax,aeroembolism,needle track implantation metastasis occurred.Conclusion Accurate and skillful CT-guiding techniques and appropriate operation methods are important to improve the success rate and to reduce complications of CT-guided percutaneous pulmonary biopsy.

Objective To explore effects of breath training and psychological induction to heart rate before coronary angiography with 64-slice spiral CT. Methods 100 cases are involved. All of them are divided into 2 groups randomizedly. Heart rate is counted before examination. Breath training and psychological induction are performed in one group. Results Heart rate decreases significantly in the group accepting training and induction. Conclusion It is effective to decrease heart rate and stablize heart rhythm for patients to accept breath training, psychological induction, and other relaxing training. Also, breath training makes patients to coordinate examination properly.

Objective To review computed tomographic angiography (CTA) signs and its potential use in the diagnose of blunt thoracic aortic injury Methods We reviewed 37 cases with blunt thoracic aortic injury (TAI) confirmed by surgery or aortography in Chinese PLA General Hospital emergency department from June 2004 to June 2014.CTA were performed on these patients,and CTA images were analyzed retrospectively to obtain characteristic CTA signs of blunt thoracic aortic injury.Results Of the 37 cases,the blunt injury in aortic isthmus were 83.8％ (31/37),aortic arch 5.4％ (2/37),descending aorta 8.1％ (3/37),and ascending aorta 2.7％ (1/37),respectively.CTA signs of thoracic aortic injury manifested as intimal flap in 34 patients (91.8％),abnormal aortic contour or cavity in 37 cases (100％),arterial contraction in 17 cases (45.9％),aortic dissection in 10 cases (27.0％),pseudoaneurysm in 21 cases (56.7％),thrombosis in 1 case (2.7％).Conclusions CTA signs could be used to facilitate the diagnosis of blunt thoracic aortic injury with a qualitative diagnostic value.