Objective To improve the understanding of the vertebrobasilar dolichoectasia (VBD) by analyzing the MRA imaging features of VBD.Methods The data of 438 patients underwent MRA were analyzed in the study.The length and transverse deviation of the basilar arteries (BA) were measured for the diagnosis and classification of VBD.Of 438 patients, 342 patients were diagnosed as brain infarction (BI) by head MRI.All of the BI patients were divided into 2 groups (VBD and non-VBD) and the classifications of BI were compared between the two groups.Results Of 438 patients, 16 were diagnosed with VBD by MRA.According to the modality of VBD on MRA, VBD were classified into 4 types: S type, U type, L type and spiral type.Among the 16 patients, there were 7 patients with S type, 5 patients with U type, 3 patients with L type and 1 patient with spiral type.S type had the highest incidence and the mildest symptom.The incidence of VBD in BI patients was 3.98%, and the incidence of BI in VBD patients was 2.1 times greater than that of patients without VBD (P<0.05).Conclusion VBD can be classified into 4 types according to the MRA results.The clinical symptoms are varied with different imaging features, and VBD is closely related to the posterior circulation ischemia, especially brainstem infarction.

w-3 polyunsaturated fatty acids, particularly docosahexaenoic acid (DHA) , are essential components for the development of human brain. A fish oil product enriched with DHA (51. 65%) was used to conduct a preliminary memory study with rats employing the active avoidance test. Three doses of DHA, 1. 0 g/kg, 200 mg/kg and 40 mg/kg, were administered orally to the rats twice daily for 20 days. The results showed that there was a positive correlation between the effects on memory ability and DHA adiministration, and the effects were dose responsive. The results also showed that DHA, at 200 mg/kg, could antagonize dysmnesia caused by scopolamine and had hypermnesia effect.

Laparoscopic cholecystectomy is the gold standard for the treatment of gallstones and chronic cholecystitis.A patient with gallstone was admitted to the 88th Hospital of PLA in August 2012 and received laparoscopic cholecystectomy.She had bile leakage after operation,and had to accept reoperation.Pancreaticobiliary maljunction and aberrant duct upon gallbladder bed were found postoperatively by T-tube cholangiography and pancreatic amylase test in the bile,which led to a complicated treatment and a tortuous recovery.This article analyzed the treatment process for this disease and explore the proper diagnosis and treatment.

Objective To analyze MRI value in diagnosing liver abscess.Methods MRI findings of liver abscess confirmed by clinical and pathology in 29 patients were analyzed retrospectively.Results 17 patients were single lesion and 12 patients were multiple lesions,totally 58 liver abscesses.MR imaging showed cluster sign in 15 cases,abnormal hepatic segmental or lamellar signal in 22 cases,lace pattern and crest septum in 17 cases,target sign or double ring sign in 8 cases,abscess with gas in 3 cases and tissue crumb sediment inside of abscess in 3 cases.On contrast-enhanced scan in 10 cases,7 cases showed marginal enhancement and 5 cases showed honeycomb or grid enhancement.Conclusion MRI can preferably show the characteristics of liver abscesses,it is of important value in diagnosis.

Aim To investigate the effect of ultra low molecular weight heparin(ULMWH)to protect primarily cultured rat cortical neurons from the deleterious effects of the neurotoxicant glutamate (Glu)and explore the related mechanism.Methods Cortical neurons of fetal rats were cultured carefully in vitro and treated with 100 ?mol?L-1 Glu so that the protective effects of ULMWH were observed thoroughly. And then the viability of cortical neurons, morphological change together with the number of apoptotic neurons,and the concentration of intracellular free Ca2+([Ca2+]i)were measured by MTT assay, Hoechst33258 staining and Fura-2/AM double wavelength fluoremetry, respectively.Results Brief exposure of cultures to 100 ?mol?L-1Glu led to extensive neuronal death and rapid increase of [Ca2+]i.Pretreatment with ULMWH over the concentration range of 0.01~1 mg?L-1 significantly inhibited the Glu-induced neuronal cell death assessed by a MTT assay and the number of apoptotic nuclei, evidenced by Hoechst 33258 staining.Glu-induced elevation of[Ca2+]i was decreased by pretreatment with 1 mg?L-1 ULMWH, which was indicated by Fura-2/AM not only in assay medium containing Ca2+ but also in Ca2+-free assay medium.Conclusions Those results suggest that ULMWH protects the cultured neurons from Glu-induced neurotoxicity, which may be attributed to its alleviating intracellular free Ca2+ overload via suppressing intracellular Ca2+ release from internal stores induced by Glu.

AIM To study effects of desulfated and poly sulfated heparin derivatives on rat mast cell (MC) degranulation. METHODS Different methods were used to prepare different sulfated heparin derivatives: 2 O desulfated heparin (2DeSH),N desulfated reacetylated heparin (NDeSAcH),6 O desulfated heparin (6DeSH),poly sulfated heparin (PSH). Passive MC degranulation induced by ovalbumin in rats to was employed observe the effects of different sulfated derivatives on rats MC degranulation. RESULTS All the sample groups were found of obvious inhibition of MC degranulation( P

Objective To evaluate the safety and feasibility of simple ligation and resection of the tumor involved inferior vena cava (IVC) without reconstruction during the resection of huge intraabdominal tumors.Methods From 2008 to 2011,4 cases of giant tumor encroaching on inferior vena cava underwent resection without IVC reconstruction.After resection,renal vein was not obstructed in patient 1 and 2.Tumor invaded the third patient's retrohepatic inferior vena cava,anastomosis was performed between the left hepatic vein and the opening of atrium dextrum with artificial vascular graft.The forth patient had right trisegmentectomy of the liver with retrohepatic inferior vena cava resection,anastomosis was performed between the left hepatic vein and the remaining inferior vena cava.Results All 4 patients had a successful operation without intraoperative massive bleeding and death.The postoperative complications included edema in one patient whose collateral circulation was damaged and bile leak in one.Ewin sarcoma patient died of tumor recurrence after a year,but there was no sign of poor renal function and other complications.Ligament fibroma patient had lower limb edema for a long time after the surgery,and tumor relapse for the fourth time in two years following resection.Conclusions When a giant tumor involving and invading IVC,undergoing resection,under the condition that the collateral circulations around IVC established completely,resection and ligation of the inferior vena cava along with huge tumor without IVC reconstruction is safe.This method saves operation time,increases the safety of surgery.

Objective By combined application of endoscopic and microscopic vivisection-pronged approach,forms a three-dimensional morphological observation through focusing on an observation of structure of various signs, imaging features, morphology and measuring in vivo data, which are concerned with expansion of transsphenoidal approach. This will provide expansion of transsphenoidal approach with an intuitive morphological imagines,detailed anatomical parameters,accurate imaging data,viviperception and data measurement. Methods 80 patients were recruited for investigation, preoperative measurement of the size of the patient' s nose,height of nasal columella,the plane angle among bridge of nose,inner canthal of eyes and nose columella,and the length of bridge of nose.in the operation,measure the distance from nasal columella to aperture of sphenoidal sinus; observe the shape of aperture of sphenoidal sinus; measure the longest and the shortest distance between aperture of sphenoidal sinus; observe the shape of septum of sphenoidal sinus,three uplift and the relationship among them,as well as the color and texture of the tumor.Measure sphenoid sinus wall,screening room,sellar floor,extent of slope resection,operating space,as well as observation & study of selection and repairing of skull base reconstruction materials. Results The shape according to the discretion of the column is divided into butterfly saddle nose, normal nose, eagle nose and acromegaly hypertrophy nose.The nostrils shape is kidney form,ball form,snow humanoid formand triangle form.The butterfly saddle biggest digging distance:between the cavernous sinus is( 18.9±2.51 ) mm,from saddle nodules to slope is(19.2 ±2.67) mm.After tumor resection,the transsphenoidal observation space is forward to former group of ethmoid sinus,back to the slope. Conclusion The measurement data might be benefit for selecting of speculum, evalution of placing depth on speculum and operation position and sellar floor opening range. It would also make it possible for a safer, minimally invasive and effective surgery by avoid damage to the internal carotid artery,cavernous sinus or cranial nerve.

Objective: Gallbladder polyps are frequently discovered in the past decade. Ifthe polyps are oenign,without concomitant stone and the gallbladder has a good function, it is not an absolutely indication for cholecystectomy. For this reason percutaneous endoscopio polypectomy of the gallbladden polyps were developed and applied. Methods: Among those who underwent peroutaneous endosoopic polypectomy of the gallbladder, 85 patients with gallblaeder polyps were studied. Under the epidural anesthesia, cholecystoscope was introduced into the gallbladder. The polyps were coagulated by self-made miorowave ceagulator and then resected for histopathelogical evaluation. The preserved gallbladders were followed up to evaluate the effioacy of this minimally invasive therapy. Results: All precedures were eventful with mean operation time of 1h to 1. 5h. Sixty seven patients were followed-up for a mean of 5.5 yeah (2～9 years) and showed all patients to be symptom free and in 64 cases the gallbladder function was found to be well preserved without recurrence of polyps and occurrenca of gallstones on ultraSound. Conclusion: The procedure reposed is a reliable, simple,effective and minimally invasive technique to remove gallbledder polyps and to preserve gallbladder function for the patients who have the benign gallbladder polyps.