Objective To study the characteristic cluster structure of good-quality natural drinking water.Methods The coupling 17 O NMR(nuclear magnetic resonance)FWHM(full width half maximum)was selected as the index to weigh the rel-ative average size of water cluster in liquid water.The 17 O NMR FWHM of water samples(nature water and artificial water)were measured by ARX400NMR spectroscopy.Results 17 O NMR FWHMs of21representative water samples were in the range of53-145Hz.Conclusion 17 O NMR FWHM of good-quality natural drinking water mainly lay from70to90Hz.

Objective To provide anatomical profile of the cranio-cervical region for the surgical treatment of ventral atlantoaxial lesions through transoropharyngeal approach.Methods Ten fresh specimens of craniocervical region were dissected layer by layer with microsurgical technic in accordance with the transoropharyngeal approach for the surgical treatment of atlantoaxial lesion, with special attention to anatomical stratification of pharyngeal posterior wall, the course of the vertebral artery, anatomical relation between the atlas and the axis, and anatomical parameters pertaining to internal fixation for the atlantoaxial joint. Results Pharyngeal posterior wall consisted of two layers (mucosa and prevertebral fascia) and two spaces (posterior interspace of pharynx and anterior interspace of vertebrae). Through anterior transoropharyngeal approach, the region between the anterior rim of the foramen magnum down to C 3 could be exposed. The distance between the vertebral artery and midline of the atlar and axis was 25.2?2.3mm(20.4-29.7mm) and 18.4?2.6mm(13.1-23.0mm) respectively. The exposed areas of the atlas and axis were 39.4?2.2mm(36.2-42.7mm) and midline was 39.0?2.1mm(35.8-42.3mm), respectively. The distance(a) between the two screw inserting points on the atlas (middle point of C 1 lateral mass) was 31.4?3.3mm(25.4-36.6mm). The vertical distance(b) between the connecting line of two screw inserting points on the atlas and that of two screw inserting points on the axis (3-4mm lateral to the midline of C 2 vertebra) was 18.7?2.7mm(14.9-23.2mm). The odds of a/b ranged from 1.5 to 1.7. Conclusion Atlantoaxial surgery through transoropharygeal approach is safe and feasible. The approach is suitable for internal fixation of anterior atlantoaxial joint, and the design of the plate should be based on the above data.

Objective　To observe the curative effect of adult ischemic necrosis of femoral head by intramedullary decompression and arterial pulse pressor infusion.Methods　82 patients with ischemic necrosis of femoral head were treated in the combined treatment of percutaneous intramedully decompression and pulse pressor five medicine combined infusion in target vessels using ZC-Ⅰ-discome.Results　By follow-up for 12～48 months,the painful in hip joint was alleviated and joint movement was also improved.The regenerative vessels and bone in femoral head and neek were obvious.Conclusion　This therapcutic methods is safe and superior to single interventional medicine treatment for ischemic necrosis of femoral head.

Objective To observe the curative effect of adult ischemic necrosis of femoral head by intramedullary decompression and arterial pulse pressor infusion.Methods 82 patients with ischemic necrosis of femoral head were treated in the combined treatment of percutaneous intramedully decompression and pulse pressor five medicine combined infusion in target vessels using ZC-Ⅰ-discome.Results By follow-up for 12～48 months,the painful in hip joint was alleviated and joint movement was also improved.The regenerative vessels and bone in femoral head and neek were obvious.Conclusion This therapcutic methods is safe and superior to single interventional medicine treatment for ischemic necrosis of femoral head.

The theoretical basis, significance and feasibility of tutor system for undergraduates in medical informa-tion education were studied.It was considered that the tutor system for undergraduates is an effective means for training medical information talents as it can help the undergraduates to know what role they will play in itheir future po-sition and the professional knowledge they should master, ncrease their study interests and stimulate their study motives by providing the professional skill education service in an order form.The management model of tutor system for under-graduates was put forward according to the significant features of undergraduate course education and cross subjects, the various requirements of professional skills, and the low study motives in domestic medical information education.The problems to which attention should be paid in implementing the tutor system for undergraduates were elaborated .

Objective To establish methodology to detect telomerase activity based on real-time quantitative PCR technique combined with telomeric repeat amplification protocol (TRAP). Methods RQ-TRAP system was developed by combining real-time quantitative PCR technique with conventional TRAP method. Telomerase activity was assessed and compared by RQ-TRAP assay and TRAP connected with enzyme-linked immunosorbent assay (TRAP-ELISA) respectively in 12 kinds of cells. Results The RQ-TRAP method was both accurate and specified in measuring telomerase activity in a series dilution of protein extracts from 293T cells. The sensitivity of this method was 8 cells and the amplification efficiency was 98.92%. Telomerase activity was not detected in negative control group. Statistical analysis revealed a strong correlation between the two assays (r2=0.762 5). Conclusion The feasibility of RQ-TRAP was proved in this article. Compared with TRAP-ELISA, RQ-TRAP has many advantages. Apart from sample extraction and real-time PCR cycling, no other extra time-consuming steps are needed for telomerase quantification;RQ-TRAP is less costly and more rapid and reliable than TRAP-ELISA for quantification of telomerase activity and it also support high throughput.

BACKGROUND: Decompression-internal fixation is needed in the treatment of atlantoaxial dislocation accompanying with spinal compression caused by cranium-neck junction area malformation and other diseases.Different internal fixation methods are chosen according to different conditions, including anterior atlantoaxial internal fixation, posterior atlantoaxial internal fixation or occipitocervical internal fixation. Transoralpharyngeal atlantoaxial plate internal fixation is a method for atlantoaxial anterior fixation. It is developed recently and used for difficult and complicated atlantoaxial dislocation induced by congenital disease, trauma or rheumatoid arthritis.OBJECTIVE: To probe into the clinical application of transoralpharyngeal atlantoaxial reduction plate system in the atlantoaxial dislocation caused by obsolete odontoid fracture.DESIGN: Single Sample observation SETTING: Department of Orthopaedics, Guangzhou General Hospital of Guangzhou Military Medical University of Chinese PLA PARTICIPANTS: Twelve patients with atlantoaxial dislocation caused by obsolete odontoid fracture were selected in the Department of Orthopaedics, General Hospital of Guangzhou Military Medical University of Chinese PLA from January 2003 to October 2005. Among them, 7 were male and 5 were female, they were aged 47 years on average ranging from 36 to 59 years. The mean injured time was 19 months ranging from 4.5 to 36 months; 6 patients were graded as C degree, 3 as D degree and 3 as E degree in Frank gradation.METHODS: Twelve obsolete odontoid fracture caused by atlantoaxial dislocation underwent transoralpharyngeal anterior decompression. Transoralpharyngeal atlantoaxial reduction plate system was used in reduction and fixation. Autogeneic ilium was implanted into bilateral articulatio atlantoepistrophica.MAIN OUTCOME MEASURES: ① Frank gradation of patients at the 4th week after operation. ② whether the internal fixation is loose or not after operationRESULTS: ①Frank gradation at the 4th week after operation: Among the 6 patients who were primarily graded as C degree, 4 patients improved to be E degree and 2 patients D degree; Three patients who were primarily graded as D degree all improved to be E degree; Patients who were primarily graded as E degree did not changed. ② Except for one patient who suffered dislocation again for loosening of screw caused by tumble, the other patients had firm fixation, ideal fusion and satisfying spinal decompression.CONCLUSION: Transoralpharyngeal atlantoaxial reduction plate system finishes atlantoaxial reduction and fixation once. It avoids conducting posterior fusion fixation operation after anterior decompression. It also avoids fetal injury for spinal cord caused by extreme atlantoaxial unsteadiness in the process of movement and turning over.

After the feasibility to reform the blended teaching model for health information management and its im-plementation were described , the reform of blended teaching model for health information management and its prob-lems were analyzed in terms of its model establishment , process implementation and effect assessment according to the target of professional training in Bengbu Medical College .

Although targeted, immune and other therapeutic strategies have become the first-line standard therapy for patients with advanced lung cancer, acquired drug resistance is still inevitable in most cases. The advent of antibody-drug conjugates (ADC) provides a new choice. ADC is a new anticancer drug formed by the coupling of targeted anti-tumor monoclonal antibodies and cytotoxic drugs. Compared with chemotherapeutic drugs, ADC has the advantages of high tolerance, accurate target recognition and little effect on non-cancer cells, and has shown good clinical benefits in the treatment of a variety of malignant tumors. This article reviews the application of ADC in advanced non-small cell lung cancer.

Objective To evaluate the biomechanical characteristics and the clinical advantage of transoral atlantoaxial reduction plate(TARP)Ⅲ.Methods Design of TARP-Ⅲ was based on TARP-Ⅱ.The screw hole in the axis was moved 1-2 mm upwards and inwards in a plate which turned a vertebral screw into a pedicle screw or an articular process screw.A polyaxial self-lock ring and polyaxial guiding drill were added to the crew hole of the plate.Finally,the withdrawal resist ence force of the three axis screws was tested and TARP-Ⅲ was used in 44 patients with complicated irreducible atlantoaxial dislocation.The axis was fixed with the pedicle screw or the articular process screw.Results The maximum withdrawal resist ence force of the anterior pedicle screw,the articular process screw and the vertebral screw in the axis was(593.1 ± 97.8)N,(469.9 ± 73.3)N and(395.2 ± 75.1)N respectively,with statistical difference between groups among three fixation methods(P ＜ 0.05).All 44 patients were followed up for 5-38 months(average 18 months),which showed complete anatomic reduction in 36 patients and appropriate anatomic reduction in eight,with basic correction of the angles between the brain stem and the spinal cord and sufficient decompression of the spinal cord.The decompression rate of the cervical spinal cord was average 88.2% according to the Yin evaluating method of cervical cord decompression.The improvement rate of spinal cord function was average 76.6% according to Japanese Orthopaedic Association(JOA)score.Conclusion With the design of polyaxial self-lock mechanism,TARP-Ⅲ with the pedicle screw or the articular process screw surpasses TARP-Ⅱ with vertebral screw in aspect of biomechanics.