The mortality rate was measured against the time of the treatment of ozone and the variation of ozone concentration. Experiment results indicate that Ganoderma lucidum hyphae could be destroyed completely by ozone and the mortality rate obviously went up with the prolonging of treatment time. The changes of cell form and the fluorescence of hyphae (dyed by acridine orange or not) were observed through biological microscope, laser confocal scanning microscopic imaging system, transmission electron microscope, scanning electron microscope and atom force microscope, and the mechanism of Ganoderma lucidum hyphae (eucaryote) destroyed by ozone was studied.

Adolescent ; Adult ; Catheterization, Central Venous ; instrumentation ; Device Removal ; Humans ; Male ; Vena Cava, Inferior ; Vena Cava, Superior

Objective To compare the diagnostic value of 64-slice helical CT cholangiography and MR cholangiopancreatography (MRCP) for pancreaticobiliary obstructive diseases. Methods Thirty-six patients with pathologically proved pancreaticobiliary obstruction or endoscopic retrograde cholangiopancreatography (ERCP) were examined with MRCP and routine enhanced CT scanning. CT row data of portal venous phase were reconstructed with 0.625 mm thickness and intervals. Then multiplanar reformation (MPR) of intra- and extrahepatic biliary duct, gallbladder and pancreas was generated, and curved planar reformation (CPR) was performed when necessary. The accuracy of MPR (and CPR) and MRCP in evaluating the site and nature of obstruction was compared. Results The accuracy of MPR and MRCP was 97.22% and 94.44% in evaluating the site of obstruction, respectively. In evaluating the nature of obstruction, the accuracy of MPR and MPCP was 83.33% and 80.56%, respectively, and the accuracy of MPR increased to 88.89% in combination with CPR in some patients. There was no statistical difference between the accuracy of MPR and MRCP in evaluating the site and nature of obstruction, while their diagnostic consistency was medium (Kappa=0.471). Conclusion Both MSCT cholangiography and MRCP have high diagnostic value in pancreaticobiliary obstruction, while the former gets some advantages in images review for clinicians.

Objective To evaluate the treatment of advanced endometrial cancer with californium-252 brachytherapy. Methods 21 cases of endometrial cancers who had not received any treatment were diagnosed as in the stages Ⅰ～Ⅳ according to the criteria of FIGO. Treatment schedule included: 252Cf brachytherapy, 8～12Gy/fraction/week, the total dose of reference point A was 35～45 Gy and total dose of reference point F was 35～50Gy in three to four implant sessions. On the second day after 252Cf therapy, the whole pelvis was treated with 6MV X-ray external beam radiotherapy, 200 cGy per fraction, 4 times per week. The total dose of external beam radiotherapy was 45 to 50 Gy (the middle of pelvis was shielded with 4cm of lead), and the total treatment time was 5～6weeks. The recent therapeutic effect and complications were observed. Results The average time of complete tumor regression was 25 days, the local control rate was over 90%; the late radioactive complications of bladder and rectum was low during the 5-year follow-up period. Conclusions Combined californium-252 brachytherapy and high energy X-ray external beam radiotherapy may be safe and effective on advanced endometrial cancer.

Objective To research the early effect and side effect on the radiotherapy of nasopharyngeal carcinoma patient using IMRT compared with conventional radiotherapy. Methods Seventy eight nasopharyngeal carcinoma patients were divided into IMRT group (38 patients) and conventional radiotherapy group (40 patients). After CT-sim, the radiation oncologist and physician delineated the outline of GTV, CTV, parotid gland, spinal cord and brain stem. The receiving volume of parotid, spinal cord and PTV was respectively calculated by using inversing plan. Face-neck, supracalvicular field, amte-aural field and postaural field were adopted to receive electrons during conventional radiotherapy. Seven to nine conformal fields including 80-100 sub-fields were adopted during IMRT. The reaction of skin, parotid (xerostomia) and oral mucosa were recorded during radiotherapy. Results The nasopharyngeal and para-nasopharyngeal lesions regressed completely after radiotherapy. The volume received by the parotid, spinal cord and PTV was 30%?4.8, 56%?6.7, 95%?8.6, 92%?8.1 respectively in IMRT group, and 98%?9.4, 56%?10.7, 100%?9.7, 99%?9.5 respectively in conventional radiotherapy group. The received volume of parotid in IMRT group was significantly lower than in conventional radiotherapy group. The reaction of skin was grade I in IMRT group and grade II, III in conventional radiotherapy group. The reaction of parotid (xerostomia) was grade I and II in IMRT group and grade II and III in conventional radiotherapy group. The reaction of oral mucosa was grade I to II in IMRT group and grade II and III in conventional radiotherapy group. The reactions of skin and parotid (xerostomia) were lighter in IMRT group compared with those in conventional radiotherapy group. The time of radiotherapy was 45?4.4 days in IMRT group and 51?5.3 days in conventional radiotherapy group respectively. Conclusion The radiotherapy using IMRT regime can decrease the reaction of parotid (xerostomia) and skin to complete the radiotherapy course of nasopharyngeal carcinoma patients. Moreover, it can increase the life quality in nasopharyngeal carcinoma patients after radiotherapy and also shorten the time of radiotherapy.

OBJECTIVE To explore the canonical prevention and management method to improve the control quality safety of hospital infection in operating room,and the medical care quality.METHODS The key points included infection institution,nosocomial control,operating room management,effective infection disinfection,isolation and other measures.RESULTS According to canonical scientific management available to quality safety of infection prevention,it could prevent infection in operating room.CONCLUSIONS In order to prevent nosocomial infection the accomplishment of effective disinfection and isolation measures during contaminated operation in hospital operating room is an important guarantee to the medical care quality.

Objective Treatment remnant electrode infection of permanent cardiac pace makers Methods Remnant electrodes were wrapped in silicone adhesive and covered with skin Results In 16 patients of permanent pace makers with infections of remnant electrodes, by using the method of wrapped and covered electrodes, infection did not occur in the observation of 3 to 24 months Conclusion It is an effective method to treat the infection caused by remnant electrodes of pace makers by means of silicone adhesive wrapping and covering electrodes

Five fractions,Ⅰ(R_f0.06)、Ⅱ(R_f0.21)、Ⅲ(R_f0.45)、Ⅳ(R_f0.60)、Ⅴ(R_f0.75)have been obtained after HT-toxin from race 1 of Exserohilum turcicum 99-2 isolated by TLC. In all of these fractions,only fractions Ⅱ had specific toxicity to the corn leaves with Ht1 gene. Then fractions Ⅱ-1、Ⅱ-2、Ⅱ-3 were isolated from fractions Ⅱ by HPLC purification,and the bioassay result showed only fraction Ⅱ-3 was toxigentic to corn leaves with Ht1 gene but non-toxigentic to corn leaves without Ht1 gene. Fractions Ⅱ-1、Ⅱ-2 and Ⅱ-3 were scanned by UV-Vis spectrophotometer. It was shown that the fractions Ⅱ-1 and Ⅱ-2 had analogous spectrum,and especially the fraction Ⅱ-3 had a special peak at 300nm.

Objective To analyze the mutations in nucleotide sequences of transfusion transmitted virus(TTV) in neonatal infection.Methods Neonatal serum TTV-DNA was detected by a nested PCR technique.Fifteen Chinese neonates with positive TTV-DNA were diagnosed as TTV infection.ORF1 sequences of TTV-DNA from these neonates were determined.Results Homology of Chinese TTV(C01-C15) and Japanese TTV(N22)isolated ranged from 87.1%-97.7% at nucleotide level,but there were point mutations in Chinese TTV,such as GG→TT in locus 112 and 113,TTATC→CCTAT in locus 236-240.Conclusions Chinese and Japanese TTV isolated had the same genotype.Some gene mutations may increase the TTV pathogen,and result in neonatal hepatitis syndrome or hyperbilirubinemia.

Objective To investigate the protective effects of recombinant human erythropoietin(rhEPO)treatment on histopathologic changes seen in hyperoxia induced lung injury.Methods Rat pups were randomly divided into four groups:Ⅰ:air-exposed control group,Ⅱ: air-exposed+rhEPO-treated group,Ⅲ:hyperoxia-exposed control group,Ⅳ:hyperoxia-exposed+rhEPO-treated group.GroupⅢ and Ⅳ rats were exposed to 85% oxygen.GroupⅡand Ⅳ rats were received rhEPO (1 200 U/kg) subcutaneously on postnatal 0 day and 2 day.On postnatal 14 day,survival curve,measurement of body weight and lung weight,radical alveolar counts(RAC),microvessel count were compared,CD_ 31 and vascular endothelial growth factor(VEGF) were performed by immunostaining to assess hyperoxia-induced changes in lung morphology.Results Treatment of hyperoxia-exposed rats with rhEPO prolonged the survival and resulted in a significant increase in the weight gain of body and lung[(25.88?2.59) vs(18.8?3.93) P