Invasive pituitary adenoma is a common pituitary adenoma invading nearby structures such as the sphenoidal sinus, ethmoidal sinus,upper clivus,sellar floor dura and bone. With the development of diagnosis neuroradiology, endocrinology,pathology and microsurgery,dramatic progress has been made on the pathogenesis, pre operative diagnosis and therapy of invasive pituitary adenoma.The development of pathology,molecular biological and medication and surgical therapy of invasive pituitary adenoma in the past few years is discussed in this paper.

OBJECTIVE:To determine the residues of 9 kinds of organochlorinated pesticides in Polygonum multiflorum.ME-THODS:Samples were extracted with ethyl acetate by ultrasonic wave assistant extraction and purified on Florisil solid-phase extraction column.The residues of organochlorinated pesticides were determined with capillary gas chromatography with GC-MS.The separation was performed on DB-5MS(30 m?0.25 mm,0.25 ?m) fused-silica capillary column with injector temperature of 230 ℃.The initial column temperature was 100 ℃,then raised to 220 ℃ at the rate of 8 ℃?min-1.The column temperature was ra-ised at 250 ℃ at the rate of 5 ℃?min-1 for 10 min.The column flow was 1 mL?min-1 and injection volume was 1 ?L.RESULTS:9 kinds of organochlorinated pesticides were completely separated within 30 minutes.The average recoveries ranged from 80.4% to 97.2%(RSD ranged from 3.5% to 7.4%,n=6).CONCLUSION:The method is sensitive and accurate for the content determination of the residues organochlorinated pesticides.

Objective To investigate the pharmacodynamics of rocuronium in infants with obstructive jaundice. Methods Thirty infants aged 1 to 4 months without neuromuscular diseases or renal dysfunction were divided into two groups with 15 cases each. The patients in group A were diagnosed with biliary atresia and scheduled for the kasai operation, and those in group B were with normal liver function and scheduled for abdominal surgery as the controls. Anestheisa was induced with propofol 2 mg/kg and fentanyl 3 g/kg. Rocuronium 0. 6 mg/kg was given and neuromuscular block was recorded with acceleromyography. Results Comparing with group B, The onset time of rocuronium was significantly longer in group A than that in group B[(81±35) s vs (51±28)s](P< 0. 05). There were no significant differences between the two groups in the maximum depression time [(49±15) min vs. (48±12) min]or the clinical duration of action[(76±20) min vs. (71±14) min]. Conclusion The onset time of rocuronium is prolonged in infants with obstructive jaundice.

Objective To investigate the toxic effects of ozone on rat astrocytes in vitro. Methods Twelve 1-2 day old Wistar rats were anesthetized with ether. Their brains were removed. Astrecytes were enzymatically isolated with trypsin and cultured. After different-speed cultivation and serial passage, astrocytes were seeded into 24 well plates and divided into 4 groups (n = 7 each): group Ⅰ normal control (group C) and group Ⅱ , Ⅲ , Ⅳ (group O2-O340, 60, 80) were exposed to ozone 40, 60 and 80 μg/ml respectively. After 2 and 4 h incubation, the astroeytes were examined under microscope. Supernatant was collected and cells were broken for determination of SOD activity and MDA content in the cells and LDH leaking ratio. Results Cells in group O2-O3 60 and 80 exhibited hypertrophy, vacuoles and black denatured grains in the cytoplasm and increase in proceses. SOD activity and MDA content were significantly increased at the end of 2 h incubation in group O2-O340, 60 and 80 as compared with blank control group. LDH leaking ratio and MDA content were increased in a concentration dependent manner at the end of 2 h and 4 h incubation, while SOD activity was decreased concentration dependently at the end of 4 h incubation. SOD activity was signifieandy decreased, while LDH leaking ratio was increased at 4 h as compared with that at 2 h in group O2-O360 and 80. Conclusion Ozone has toxic effects on cultured rat astroeytns in a concentration and time dependent manner.

ObjectiveTo evaluate the significance of pirif orm aperture enlarge ment in transsphnoid approach microsurgery for pituitary macroadenomas.MethodsTranssphnoidal approach microsurgery through enlarged pyrifor m aperture was ca rried out in 96 patients with pituitary macroadenoma from March 1997 to October 2000.ResultsAmong the 96 patients, 65 (67 7%) underwent tot al removal of the tumor, 25 (26 0%) underwent subtotal removal (80%～90%), and 6 (6 3%) partial removal (

Objective To study the optimal time of MRI follow-up after transsphenoidal surgery in patients with nonfunctional pituitary macroadenoma. Methods MRI records of 50 patients before surgery,within 1 postoperative week (early stage),at 3 months (intermediate stage) and 1 year after surgery (late stage),respectively,were retrospectively analyzed.Dynamic changes in the sella turcica were observed and the degrees of tumor excision were studied before and after MRI T 1-weighted enhanced scans at different postoperative stages. Results In the early stage MRI images showed that the size of sellar contents decreased by 8%～32%,tumor disappeared in 22 cases,and suspected residual tumor was found in 28 cases.At 3 months after surgery,MRI scans revealed that sellar contents decreased by 11%～85% in size.On coronal position MRI scans,the size of sellar contents decreased more than 50% in 11 cases,30%～50% in 9 cases,less than 30% in 8 cases.Out of the 28 cases that were suspected of residual tumor in the early stage,confirmation of residual tumor in the sella turcica was made in 23 cases.MRI findings 1 year after surgery showed no change in the sella turcica in 46 cases and continuing to decrease in 4 cases. Conclusions Re-examination of MRI in intermediate stage after transsphenoidal surgery in patients with nonfunctional pituitary macroadenoma facilitates the detection of residual tumor and recurrence.

Objective To evaluate the efficacy and safety of transplantation of autologous bone marrow mesenchymal stem cells (BMSCs) and mononucleus cells (BMMNCs) for treating coronary heart disease. Methods Ten patients who had suffered from coronary heart disease with myocardial infarction, were selected. In 7 patients BMSCs+BMMNCs were transplanted immediately following PCI and 3 patients only accepted transplantation of BMSCs+BMMNCs without PCI. Autologous BMSCs+BMMNCs were isolated and cultured for 2-3 weeks. And (0.9～3.5)?106 BMSCs+1.6～6.1?106 BMMNCs were transplantated through intracoroary way. Cardiac functions were determined by 2-D echocardiography、 technetium- 99m methoxyisobutylisonitrile ( 99m Tc-MIBI) and ECG Holter monitor before and 6 months after the procedure. Results Left ventricular ejection fraction (LVEF) was significantly increased by 10.5% (4.0%-18.0%) and left ventricular diastolic diameter(LVDd) reduced by 2.2 mm (-4 mm-8 mm) and neither obvious arrhythmia nor complication was observed during the 6-12 months′ follow up in all the 10 patients. Conclusion The preliminary study showed that in the patients who suffered from coronary heart disease complicated with myocardiac infarction, transplantation of BMSCs+BMMNCs could improve cardiac function and cardiac perfusion without significant complication and arrhythmia during the 6-12 months′ follow-up.

Objective To compare the clinical outcomes of CABG and PCI with drug-eluting stent(DES)in patients with multivessel coronary artery disease and CKD.Methods Between January 2004 and June 2006,1,069 patients with multivessel coronary disease and CKD undergoing PCI with drug-eluting stent(DES)(n=724)or CABG(n=345)were evaluated.CKD was defined as estimated glomerular filtration rate(eGFR)

Objective To evaluate the effect of combined laparoscopic and endoscopic treatment for cholelith of gallbladder and common bile duct(CBD).Methods Diagnosis was established in 44 patients by ERCP , and endoscopic Oddi′s sphincteromy (EST) was performed in all patients, then choledocholith was removed by endoscopic netbasket and balloon. 3～5 days after laparoscopic cholecystectomy(LC) was carried out. Results The success rate of combined treatment in this study was 98%(43/44), and stones were removed in 100%(44/44). There was no conversion to open surgery in our series, and no severe complications. All patients were discharged in 5～15 days postoperatively. Conclusions Combined laparoscopic and endoscopic procedure is a safe and effctive method to treat patients suffering from cholelith of the gallbladder and CBD.

Objective To verify the reliability of TLD-based quality audit for radiotherapy dosimetry of medical electron accelerator in non-reference condition by monitoring the dose variations from electron beams with different field sizes and 45° wedge and the dose variations from photon beams with different field sizes and source-skin distance.Methods Both TLDs and finger ionization chambers were placed at a depth of 10 cm in water to measure the absorbed dose from photon beams,and also placed at the depth of maximum dose from electron beams under non-reference condition.TLDs were then mailed to National Institute for Radiological Protection,China CDC for further measurement.Results Among the 70 measuring points for photon beams,58 points showed the results with a relative error less than ± 7.0％ (IAEA's acceptable deviation:± 7.0％) between TLDs and finger ionization chambers measurements,and the percentage of qualified point numbers was 82.8％.After corrected by P,value,62 points were qualified and the percentage was up to 88.6％.All of the measuring points for electron beams,with the total number of 24,presented a relative error within ± 5.0％ (IAEA's acceptable deviation:± 5.0％) between TLDs and finger ioization cylindrical chambers measurements.Conclusions TLD-based quality audit is convenient for determining radiotherapy dosimetric parameters of electron beams in non-reference condition and can improve the accuracy of the measuring parameters in connection with finger chambers.For electron beams of 5 MeV ＜ E0 ＜ 10 MeV,the absorbed dose parameters measured by finger ionization chambers,combined with TLD audit,can help obtain the precise and reliable results.