Intravesical instillation after transurethral resection of bladder tumor (TURBT) has been considered as the most important and effective method for the prevention and treatment of non-muscle invasive bladder cancer (NMIBC).Nowadays, the main choices of intravesical instillation are chemical drugs and Bacillus Calmette-Guerin (BCG).For all pa-tients with NMIBC, intravesical instillation should be admistered as soon as possible after TURBT.For patients of G_(1-2)T, an immediate single postoperative instillation of chemotherapy as standard therapy for low-risk disease is enough.For interme-diate-risk patients, it is recommended to use an immediate single postoperative instillation of chemotherapy plus an induc-tion course or maintenance treatment, but the scheme of intravesical instillation should be based on the specific circum-stances of the patients.For high-risk patients, maintenance therapy with BCG should be the first chioce.The combination of intravesical BCG and chemotherapy has certain advantages in treating NMIBC, but its efficacy needs further verifica-tion.Although there is a long history of intravesical instillation after TURBT, the choice of drugs, the time of instillation, and the corresponding dosages are still inconclusive.This article summarizes the strategies of the treatment for NMIBC after TURBT.

BACKGROUND: Gene transfer to study the effect of a exogenous gene on cells is a commonly used technique for molecular biology. Compared with viral vector,pcDNA4.0-TGF-?1 eukaryotic expression plasmid transfection has no inherent toxicity or cytotoxicity,with high safety. OBJECTIVE: To construct and identify eukaryotic expression plasmid carrying recombined TGF-?1 by cloning transforming growth factor (TGF)-?1 gene. DESIGN,TIME AND SETTING: The in vitro cell experiment was performed at the Opening Laboratory of Key Clinical Medical Sciences,Henan Provincial High-learning School from March 2007 to February 2008. MATERIALS: Clean healthy Sprague Dawley rats aged 2 months,of both gender,were used for isolating RNA from cells. METHODS: The TGF-?1 mRNA was extracted from the rat bone marrow cells,and amplified by reverse transcription-polymerase chain reaction (RT-PCR),and cloned into the pGEM-T-vector and identified by PCR. Then TGF-?1 gene was subcloned into pcDNA4.0 plasmid vector. The inserting DNA sequences were analyzed. MAIN OUTCOME MEASURES: Expression of TGF-?1 cDNA,pGEM-T-TGF-?1 and recon pcDNA4.0-TGF-?1. RESULTS: There was an obvious electrophoresis strip of TGF-?1 cDNA by RT-PCR. The obtained pGEM-T-TGF-?1 was confirmed correct with PCR amplification and sequence identification. Recombinant eukaryotic expression plasmid pcDNA4.0-TGF-?1 was obtained and identified by digestion. The inserted sequences were conformity to the designed sequences. CONCLUSION: Rat TGF-?1 gene has been successfully cloned,and recombinant TGF-?1 eukaryotic expression vector has been constructed successfully.

Objective To observe the clinical value and the effect of interventional treatment on obstructive jaundice. Methods 24 patients with obstructive jaundice, including 21 cases of malignant biliary obstruction and 3 cases of chololithiasis post operative biliary stricture of bile duct, were treated after percutaneous transhepatic biliary moulding, 6 cases with percutaneous transhepatic cholangic drainage(PTCD), 18 cases with insertion of biliary stents, 13 net-type stents and 5 Z-type stents were used, according to the patient's state and financial condition. Results The total technical success rate was 100%. After 7～15 days of interventional treatment, the total serum bilirubin level declined from (454 93?64 52)?mol/L to (66 94?8 45)?mol/L, transaminase declined from (265 67?30 09)u/L to (56 21?8 73)u/L. There was very significantly difference (P

Objective To study the expression of ? 3 adrenoceptor (? 3 AR) and its function in human detrusor cells. Methods Cellular functional studies,radioligand binding experiments and reverse transcription polymerase chain reaction were used to determine the expression and its influence on detrusor contractions. Results mRNA of 3 subtypes of ? ARs was detected. Non selective ? AR agonists and ? 3 AR decreased the contractions of detrusor cells induced by KCL, but both agonist and antagonists of ? 1 and ? 2 AR could not influence the contraction;BRL37344 concentration dependently displaced dihydroalprenolol binding to the membrane of detrusor cells. Conclusions The mRNA of subtypes of ? ARs is distributed in human detrusor cells,but ? 3 ARs is the main receptor mediating detrusor relaxation.

Objective To evaluate the therapeutic results of expandable stent for treatment of atherosclerotic renovascular obstructive disease. Methods 15 patients (10 men and 5 women, 41～75 years old; mean age, 52 years) with renal arterial hypertension underwent renal stent agioplasty including renal arterial stenosis 89% (n=13) and fully obstruction without function in 2, of which 2 patients had bilateral involvement. The stenotic range of all arterial segments showed 60% to 90% width of the normal arterial diameter. 16 stents were implanted under the guidance of flouroscopy. The most of stents implanted were Palmaz (n=12, 75%) with regular clinial and angiographic follow up. Results Technical success (residual stenosis

Objective To assess clinic value of esophageal stent placement in the benign and malignant esophageal strictures,and the influence of stents selection on curative effect. Method 36 cases of esophageal strictures, 5 cases of benign strictures,31cases of malignant strictures,including 4 cases with esophagotracheal fistula and 3 cases with esophagomediastrinal fistula. 26 domestic Nickel-Titanium alloy memorial netlike stents and 14 membrane-covered stents were used for the treatment. All patients were treated by placing esophageal stent perorally under fluoroscopic guidance. Results 40 stents were planced successfully in 36 cases, only one case showed membrane covered stent migrating. Symptoms of dysphagia were considerably relieved after stent insertion. The total effective rate was 97.2%. Conclusion The esophageal stent is an effective and safe treatment for benign and malignant esophageal stenosis: The nutritive condition and the quality of life of patients are improved, which is favourable for tumor further treatment. Appropriate stent selection can keep esophageal patent rate and decrease sliding rate.

The paper proposed a new method to design and fabricate a flexible neural microelectrode arrays (MEA) for retinal prosthesis, the ion-beam technology was introduced to decrease the width of conductive wires and the distances between wires, a high density MEA (120 microelectrodes with a matrix of 10 x 12) was fabricated on a single layer of polymer from this. The MEA was proved to possess a fine electrochemical property. In vitro test, the average impedance of MEA on 1 kHz was 16 k omega +/- 2 k omega and the average phase difference was -85 degrees +/-30 degrees.
Micro-Electrical-Mechanical Systems ; Microelectrodes ; Prosthesis Design ; Visual Prosthesis

Objective To explore the influences of different inductive methods on cartilage repair by tissue engineered cartilage with the seed cell of mesenchymal stem cells.Methods Rabbit mesenchymal stem cells were divided into dexamethasone-inducing group and TGF-?_1-dexamethasone co-inducing group.The cartilage defects were repaired by autologous tissue engineered cartilage constructs.The defects of control group were filled with scaffold without cells.Specimens were harvested 6 and 12 weeks postoperatively and assessed by histological grading and in situ detection of apoptosis.Results The repair tissue formed perpendicular column structure resembling that of normal cartilage in TGF-?_1-dexamethasone co-inducing group.The histological score 12 weeks postoperatively was higher in co-inducing group(20.26?1.35) than those in dexamethasone-inducing group(14.52?1.46) and control group(4.12?1.13).But the formation of tidemark was not observed in the repair tissue.Cells of repair cartilage at the bone-cartilage interface showed apoptosis.The ratios of apoptosis in dexamethasone-inducing group were(21.4?4.5) six weeks postoperatively and(7.3?2.2) twelve weeks postoperatively.The ratios of apoptosis in TGF-?_1-dexamethasone co-inducing group were(19.8?4.7) six weeks postoperatively and(6.9?2.0) twelve weeks postoperatively.The ratios of apoptosis at 6 th week were higher than those at 12 th week postoperatively with statistical significance(P

Objective To design a handy labor monitor based on ARM hardware structure so that the condition of pregnant women can be reflected more accurately and completely.Methods The host-slave mode was adopted,which was composed of host machine based on ARM and embedded WinCE operating system.The slave machine used the 51 single chip to acquire data.Results This system was convenient and stable,and the interface is friendly.Conclusion The study of this system can be used for reference for the development of related data acquisition machine.[Chinese Medical Equipment Journal,2008,29(2):31-33]

Objective Ultra-wideband (UWB) microwave imaging is one of the promising alternatives for breast tumor detection, which can provide the desired high resolution and high sensitivity. Methods For UWB microwave early breast tumor detection, a UWB antenna with small size and compact structure is generally desired. To meet the demands of UWB microwave imaging and detection, a novel compact UWB probe is developed and tested. The probe is a combination of an exponentially-flared TEM horn and a pyramidal back-cavity, where the pyramidal back-cavity is employed to block back and side radiation. To increase the operation bandwidth, a low-frequency compensation loop loaded with resistors and a dielectric material block at the throat of TEM horn are added to the probe. Results The compact probe is fabricated and tested by vector network analyzer E8362B, and the results demonstrate an operation frequency band ranging from 1.36GHz to 20GHz for return loss under -10dB. Conclusion The probe can meet the needs of UWB microwave imaging for the early breast tumor detection.