Objective Under the requirements of dose distribution in target and normal tissue ,five radiotherapy fields are de‐voted to making Intensity‐modulated radiation therapy (IMRT) plan ,thus the IMRT radiotherapy of Nasopharyngeal Carcinoma (NPC) could be underway with the radiotherapy field as few as possible .Methods Through the comparison of the NPC patients′IMRT plans in our hospital ,the angle of fields have been make out with 0° ,75° ,125° ,225°and 285° .At the same time ,this field scheme is compared with projects of front five fields ,behind five fields and share five fields .The result was statistically analyzed . Results In these four field schemes ,the maximum and minimum dose in the target area showed no statistically difference (P>0 . 05) ,while in the average dose ,D95 and normal tissue dose have statistical difference (P<0 .05) .Conclusion Comprehensive com‐parison of the dose distribution in the target and normal tissue in these four field schemes showed that the field scheme with the an‐gles of 0° ,75° ,125° ,225°and 285°could obtain better results ,so this field scheme should be more suitable for local area NPC patient′s IM RT .

Objective:To determine the related substances in dienestrol tablets by HPLC. Methods:The separation was performed on a C18 column(250 mm × 4. 6 mm,5μm). The mobile phase consisted of methanol-acetonitrile(76∶24), the flow rate was set at 0. 8 ml·min-1 with the detection wavelength at 229 nm, and the sample size was 10 μl. Results:Under the established chromatographic conditions, the related substances and dienestrol were separated completely. The limit of detection was 2 ng. Conclusion:The method is simple, accurate, specific and sensitive in the determination of related substances in dienestrol tablets.

From the third day after Wenchuan Earthquake,the Chinese government and army dispatched 90 helicopters per day to transport the wounded to Chengdu City (about 100 km away from earthquake-hit area). From 14 May to 21 May 2008, West China Hospital of Sichuan University received totally 760 wounded mainly from Wenchuan, Yingxiu, Maoxian, Beichuan, Lixian, Mianzu. Transfering patients by helicopter is characterized by rapid,flexible and non-restriction from terrain conditions.Compared with transfer on the land,injury induced during the transfer is reduced. However, the height of helicopter cabin is low,so it's difficult for doctors to carry out related treatment works. The instability during the flight also brought a lot of difficulties for the medical care.The rapid change of speed during take-off and landing caused a series of physiological changes on patients, such as thoracic pressure. Wenchuan is located in the mountains,and this also brought difficulties for the flight. The potentially savable victims,whose lives wouldn't be threatened with bad wound and wouldn't die in a short time,should be given the priority of transfer by helicopter. During the trip of transfer,the life-threatening occurrences, such as asphyxia, persistent convulsion and shock, were well prevented. At the same time, airway management, monitoring of vital signs and necessary consolation were important. After arrival at airport, the medical staff waiting at airport should watch and evaluate the patency of airway and vital signs carefully. If the airway obstruction, vital signs unstable and some other critical events are identified, the first aid at airport is essential. When patients are stable,they can be transported to the nearest hospital where the emergency treatment is available. Besides observation of patients' condition, registration of the name, age, address and the phone number of casualties should be done in the ambulance. Stick a label of the general information and the preliminary diagnosis of the patient on bare intact skin. The selection of casualties before transfer and the first aid at the airport are very important for successful short distance trip by helicopter.

Child ; Cystitis ; Eosinophils ; Humans ; Male

Objective To observe the content of thromboxane (TXA 2) and prostacyclin (PGI 2) in optic nerves after forehead impact injury. Methods The right forehead zones of 32 rabbits were struck by biology impact machine. Tweenty four rabbits that had afferent papillary defect after injury were chosen, and randomly divided into four groups: 1 day, 2, 4, and 7 days group. Right eyes were in the experimental group and left eyes were in the control group. Flash visual evoked potentials were examined before and after the traumatic injury. The rabbits′ eyes were removed, the optic nerves were pathologically examined, and the content of TXB 2 and 6 Keto PGF 1? which were the products of TXA 2 and PGI 2 were assayed 1, 2, 4, and 7 days after traumatic injury respectively. Results Histopathological examination revealed the findings of injuries of optic nerves of all the 24 rabbits. The latency of wave P 1 was significantly delayed after traumatic injury ( P

Objective:To observe the effect of dexmedetomidine used in ophthalmic surgery anesthesia on the recovery quality in children. Methods:Totally 126 children with ophthalmic surgery were randomly divided into the control group and the observation group with the same induction program. The control group was given propofol with target controlled infusion during the operation, while the observation group was given dexmedetomidine 0. 6μg·kg-1 before the induction, and infused up in 10min, propofol with target controlled infusion was used during the operation, and stopped infusion 10min before the end of the operation. The cough number and degree, the occurrence of agitation and extubation time of the two groups were observed and compared during the anesthesia recovery period. Results:The cough incidence and agitation incidence was 36. 51% and 4. 76% in the observation group, respectively, which were significantly lower than those in the control group (74. 60% and 33. 33%, P<0. 05). The cough degree between the two groups showed significant difference (P<0. 05). The first cough time and the extubation time between the two groups showed no significant difference (P>0. 05). Conclusion:Dexmedetomidine used in ophthalmic surgery anesthesia of children can effectively control cough frequency and degree during the recovery period and reduce the agitation to improve the quality of clinical anesthesia recovery.

AIM To investigate the effects of iptakalim hydrochloride(Ipt) on the association and dissociation kinetic processes of [ 3H]glibenclamide(Gli) binding with sulfonylurea receptor(SUR 2B ) of ATP sensitive potassium channel (K ATP ) in vascular smooth muscles derived from Wistar rats,and to compare the properties of Ipt with those of nucleotides. The interactions between Ipt and nucleotides were also determined. METHODS The experiments of the association and dissociation kinetic processes of K ATP blocker[ 3H]Gli binding with endothelium denuded aorta smooth muscles were used. RESRLTS (1)The specific bindings of[ 3H]Gli with SUR 2B were not displaced by Ipt at the concentrations of 10 pmol?L -1 ～ 0 5 mmol?L 1 . Ipt 100 ?mol?L -1 retarded the association kinetic process and accelerated the dissociation kinetic process of [ 3H]Gli binding with SUR 2B . (2)Opposite to Ipt, ATP 1 mmol?L -1 accelerated the association kinetic process and retarded the dissociation kinetic process of [ 3H]Gli binding with SUR 2B There was an interaction between ATP and Ipt in the modulation of [ 3H]Gli binding with SUR 2B . (3) Similar with Ipt, ADP 1 mmol?L -1 retarded the association kinetic process and accelerated the dissociation kinetic process of [ 3H]Gli binding with SUR 2B , there was an interaction between ADP and Ipt in the modulation of [ 3H]Gli binding with SUR 2B . (4)Different from ATP and ADP, UDP had no effect on the association and dissociation kinetic process of [ 3H]Gli binding with SUR 2B . And there was not interaction between UDP and Ipt. CONCLUSION Ipt had no affinity with the binding sites of K ATP blocker in SUR 2B , but had negative allosterical modulation on it. The modulatory properties of Ipt were opposite to those of ATP, similar with those of ADP and different from those of UDP. There were interactions between ATP, ADP and Ipt in the modulation of [ 3H]Gli binding with SUR 2B , but there was not interaction between UDP and Ipt.

Castleman's disease is a rare disorder of the lymphoid system characterized by noncancerous growths that may develop in lymph node tissues throughout the body. The incidence of this disease has been increasing in recent years. Because of the difficulty of diagnosis and high-misdiagnosis, more and more clinicians have paid close attention to this disease. By the clinical work, and with the help of related reports, the preliminary summary of this disease is made.

Objective To evaluate the technique of treating severe tuberculous peritonitis complicated with intestinal obstruction. Method Clinical data covering 44 cases from Jan. 1994 to Dec. 2004 were analyzed retrospectively. All the 44 cases were suffering from severe tuberculous peritonitis complicated with intestinal obstruction for a long time. Among them 36 cases were diagnosed pre-operatively and 8 cases were confirmed post-operatively. All the patients underwent laparotomy, and all intestinal adhesions were divided, then the intestine loops were regularly aligned. Result 43 cases were cured, 2 patients developed postoperative intestinal fistula, and one patient died. Conclusion No curative effect could be obtained if medical treatment only was given for tuberculous peritonitis complicated with complete intestinal obstruction. The present surgical technique offers a better chance to relieve intestinal obstruction as a reult of tuberculous peritonitis.

To study the chemical constituents from the roots of Chirita longgangensis var. hongyao. The methanol extract was isolated and purified by silica gel, Sephadex LH-20 and preparative HPLC. Their structures were elucidated by MS and spectral data (1H, 13C-NMR). Seven compounds were isolated and identified as plantainoside A (1), plantainoside B (2), calcedarioside C (3), calcedarioside D (4), platyphylloside (5), hirsutanonol (6), and hirsutanonol-5-O-beta-D-glucopyranoside (7). Compounds 5-7 were isolated for the first time from the family Gesneriaceae.
Drugs, Chinese Herbal ; chemistry ; Organic Chemicals ; analysis ; Plant Roots ; chemistry ; Tracheophyta ; chemistry