20(S)-9-nitrocamptothecin was synthesized from camptothecin by nitration reaction using mixed nitrate salts in sulfuric acid medium.The yield was raised from 31% to 40% after chromatographic purification treatment.The best reaction conditions was as follows:0.5 g of camptothecin;30ml of sulfuric acid;0.007mol of nitrate salts(NH4NO3/CaNO3=1/1).The reaction was completed in 24h at 20℃.The advantage of this method is high yield and easily purification.

Objective:To explore the effect of locking compressing plates (LCP) internal fixation under arthroscopy combined with Zhuyu Tongluo method in the treatment of distal radius fractures (DRF) and its effects on joint function, hemorheology, serum basic fibroblast growth factor (bFGF) and bone morphogenetic protein 2 (BMP-2).Methods:A total of 78 patients with DRF admitted to the Second Hospital of Tangshan City from June 2017 to January 2020 were selected and grouped according to the random number table method, with 39 cases in each group. The control group was treated with LCP internal fixation under arthroscopy, and the study group was treated with Zhuyu Tongluo method on the basis of the control group. The recovery, hemorheology (plasma viscosity, whole blood viscosity high cut, whole blood low cut, hematocrit), serum bFGF, BMP-2 levels, before and after the operation were compared between the two groups. They were followed up for 6 months and the range of motion of the wrist joints before and after the operation and the excellent and good rate of wrist joint function between the two groups were compared.Results:The swelling subsidence time, pain disappearance time, ecchymosis disappearance time, and fracture imaging healing time in the study group were shorter than those in the control group: (10.37 ± 3.13) d vs. (14.62 ± 3.38) d, (12.39 ± 2.97) d vs. (17.14 ± 4.02) d, (19.15 ± 2.35) d vs. (24.36 ± 3.27) d, (68.21 ± 7.12) d vs. (80.07 ± 8.24) d, and the differences were statistically significant ( P<0.05). The plasma viscosity, whole blood viscosity high-cut, whole blood low-cut, and hematocrit in the study group were lower than those in the control group at 1 and 2 weeks after operation ( P<0.05). The levels of serum bFGF and BMP-2 in the study group were higher than those in the control group at 1 and 2 weeks after operation: at 1 week after operation: (356.27 ± 46.29) μg/L vs.(236.51 ± 37.42) μg/L, (614.28 ± 61.47) μg/L vs. (487.39 ± 48.24) μg/L; at 2 weeks after operation:(502.07 ± 113.21) μg/L vs. (381.59 ± 82.75) μg/L, (910.77 ± 97.20) μg/L vs. (731.35 ± 92.13) μg/L, and the differences were statistically significant ( P<0.05). The palm flexion, back extension, radial deviation, and ulnar deviation in the study group were better than those in the control group at 6 months after operation ( P<0.05). The excellent and good rate of wrist joint function in the study group was higher than that in the control group at 6 months after operation: 89.5%(34/38) vs. 70.3%(26/37), and the difference was statistically significant ( P<0.05). Conclusions:LCP internal fixation under arthroscopy combined with Zhuyu Tongluo method in the treatment of patients with DRF can increase the expression of serum bFGF and BMP-2, reduce inflammation, improve blood rheology, promote fracture healing, and improve wrist range of motion and wrist function.

Objective To analyze the clinical efficacy of pre-extensive drug resistant tuberculosis (pre-XDR-TB), and to explore the feasibility of using the standard multidrug resistant tuberculosis (MDR-TB) therapeutic regimen to treat the patients with pre-MDR-TB. Methods A retrospective analysis was made for 126 cases of the MDR-TB patients who were received the treatment in Guangzhou chest hospital from 2009 to 2013. It was divided into MDR-TB group, pre-XDR-TB group and XDR-TB group according to the drug sensitive test (DST) of quinolone(levofloxacin, moxifloxacin) and aminoglycoside (amikacin). All patients were treated for 6-months with the standard therapeutic regimen including Am(Cm), Lfx(Mfx), Pto, PAS and PZA. Results (1) There were 126 cases of the MDR-TB patients in the study, 31 cases (24.6%) complicate with aminoglycosides-resistance, 69 cases (54.7%) complicate with quinolone-resistance. (2) The negative rate of MDR-TB group, pre-XDR-TB group and XDR-TB group was 82.0%, 55.8% and 29.2% respectively (χ2 = 20.110, P < 0.001). (3)The negative rate of pre-XDR-TB group significantly lower than MDR-TB group (χ2 = 8.146, P = 0.004). The negative rate of pre-XDR-TB group higher than XDR-TB group (χ2= 4.661, P = 0.031). Conclusions The situation of quinolone and aminoglycoside resistance was high in the patients with MDR-TB. We should carry out the detection of quinolone and aminoglycoside resistance in clinical treatment. The clinical efficacy for the patients with pre-XDR-TB was significantly poorer than the patients with MDR-TB using the standard MDR-TB therapeutic regiment treated.

Objective To investigate the effects of different liver protective drugs on preventing liver injury induced by anti-tuberculosis drugs. Methods Retrospective analysis was made on 355 patients with primary pulmonary tuberculosis during intensified time. The patients received silibinon and bicyclol to prevent liver injury. 82 patients with TB were treated as control group during the same time. Results The number of patients with liver injury in silibinon group and bicyclol group were 16 cases (14.7%) and 55 cases (22.4%) respectively. The number of control group with liver injury was 9 cases (11.0%) (χ2 = 3.627,P > 0.05). The liver injuries within 4 weeks were mainly counted in. There is no difference between intervention and control groups(χ2 = 0.414,P > 0.05). There is no difference between three groups in liver injury degree (U = 0.288,P> 0.05). Conclusion Without high risk factors, anti-inflammatory and enzyme reduction drugs have no significant protective effects on liver injury caused by anti-tuberculosis drugs.

Objective To evaluate the feasibility and the clinical value of MRI in the diagnosis of small-bowel disease. Methods Sixty-three patients with suspected small-bowel diseases and 3 volunteers without signs of small bowel disease underwent MRI examination. Thirty-one patients whose diagnoses were confirmed by pathology or clinical results were categorized into two groups (neoplastic and normeoplastic). The conspicuity of bowel wall, the sensitivity of MRI in detecting small-bowel lesions, and the accuracy rate of diagnosis were calculated. The average bowel wall thickness between the two groups was assessed by using Wilcoxon signed-rank test. Enlarged mesenteric lymph nodes, mesenteric infiltration, and small-bowel stenosis were analyzed by using Fisher's exact test in each group respectively. Results MRI examinations of all 66 subjects were successfully performed. Images were rated on a continuous 4-peint scale. Sixty-two cases (93.9%) were scored as 2 or 3. The diagnoses of 31 patients (neoplastic group (n = 10) and nonneoplastic group (n = 21) were confirmed by pathology or clinical results. The sensitivity, accuracy of MRI in identifying small bowel diseases were 100% (31/31) and 77.4% (24/31) respectively. The average bowel wall thickness of the two groups was 23 mm(7.0-65.0 mm) and 5 mm(2.0-35.0 mm) respectively, and there was a statistically significant difference between the two groups (Z = - 2.949, P < 0.01). Enlarged lymph nodes in mesentery were found in 7 cases in neoplastic group and 4 cases in nonneoplastic group, and there was a statistically significant difference between the two group (P < 0.05). Small-bowel stenosis was depicted in 10 cases in both groups and there was a statistically significant difference between the two groups (P <0.01). The mesenteric infiltration sign was seen in 5 cases and 17 cases respectively, and showed no significant difference between the two groups (P > 0.05). Conclusion MRI can depict the location and extension of the small-bowel disease accurately and it is an effective method in the diagnosis of small-bowel disease.

OBJECTIVE: To introduce the efficacy of three surgical options for juvenile nasopharyngeal angiofibroma (JNA) resection, and causes of operative bleeding. METHOD: Retrospective analysis of 36 JNAs,three surgical options were used to resect the tumor. There were 15 cases of Class I tumors , using endoscopic nasal cavity approach. Eighteen cases of class II tumors, via extended Caldwell-Luk incision, using the transantral-infratemporal fosse-nasal cavity combined approach for tumor resection. Three cases of class III tumors, the combined intracranial and extra-cranial approach was used to resect the tumor. Meanwhile, report six typical cases for reference. RESULT: Fifteen (15/36) cases of class I tumors, 14 cases were completely resected for the first time without recurrence, 1 recurrence case was re-resected using the same approach. Eighteen (18/36) cases of class II tumors, 13 cases were completely resected for the first time without recurrence, 5 recurrence cases were re-resected totally. Three (3/36) cases of class III were not completely removed, and underwent about 40 Gy radiotherapy with good effects. CONCLUSION Using these three surgical options can effectively remove different types of JNA. When necessary, the intracranial residue can use radiotherapy. Under direct vision to separate the tumor, and effective hemostasis play crucial roles for complete removal of the tumor.
Adolescent ; Angiofibroma ; surgery ; Blood Loss, Surgical ; Child ; Female ; Humans ; Male ; Nasopharyngeal Neoplasms ; surgery ; Retrospective Studies ; Treatment Outcome ; Young Adult

On the basis of the existing appointment process, artificial intelligence and Internet of things technologies were introduced to optimize such process. Thanks to the all appointment process management empowered by AI and IoT, patient waiting time is cut short and patient satisfaction enhanced as a result.

OBJECTIVE: To our knowledge, study of the intraoperative profuse bleeding of pterygoid venous plexus (PVP) in large nasopharyngeal angiofibroma resection has not yet been reported. Attention should be paid to this topic in clinical practice. METHOD: From 1981 to 2009, 44 cases of JNAs were treated in our hospital. Twenty-six of 44 cases were large nasopharyngeal angiofibromas according to the Fisch classification system(Fisch type III 16, type IV 10). The amount of intraoperative blood loss in these 26 cases varied from 200 ml to 5200 ml. Factors influencing intraoperative bleeding of 26 large nasopharyngeal angiofibroma resections were analyzed retrospectively. The intra-operative observations and imaging data of three typical cases were hereby studied. RESULT: After embolization of the tumor-supplying branches of the external carotid artery(ECA), both the intraoperative observations and imaging data demonstrated that the pterygoid venous plexus (PVP) played a crucial role in intraoperative hemorrhage. CONCLUSION PVP in the infratemporal fossa communicates with craniofacial veins. There is no valve between these veins. Once PVP is seriously damaged, venous blood of all craniofacial veins will flow out profusely. In the first operation, the intact PVP in the fatty pad generally can be identified and separated from the tumor by delicate surgical managements. If an unsuccessful operation due to serious hemorrhage had been done previously, then scar tissue might tightly adhere with PVP, tumor and the pterygoid muscles, and separation of the tumor from PVP without bleeding is more difficult. Appropriate surgical approach and correct hemostatic procedure of every bleeding point should be done carefully under direct vision. Using finger or instrument for quick blind dissection should be prohibited.
Adolescent ; Angiofibroma ; pathology ; surgery ; Blood Loss, Surgical ; Hemorrhage ; prevention & control ; Humans ; Male ; Nasopharyngeal Neoplasms ; pathology ; surgery ; Retrospective Studies ; Veins ; surgery ; Young Adult

Objective:To investigate the effect of the placement of a drainage tube on the prognosis of patients with pelvic fractures treated by modified Stoppa approach.Methods:The medical records of patients with pelvic fractures treated with modified Stoppa approach from August 2012 to August 2017 were retrospectively analyzed. A total of 43 patients including 32 males and 11 females (mean age 47.6 years, range from16 to 69) were included in the study. According to Young-Burgess classification, there were 12 cases of Lateral Compression type LC-I type; 20 cases of Anterior and Posterior Compression type APC-I type and 11 cases of APC-II type. All patients were treated with modified Stoppa approach to reduce the fracture and fix with plate and screw. According to whether a drainage tube was placed during the operation, 22 cases were placed with a drainage tube (drainage group), and 21 cases were not placed with a drainage tube (non-drainage group). The main observation indicators were the intraoperative conditions, antibiotic application, incision suture removal time, postoperative body temperature change, hospital stay and clinical function (Harris score).Results:Wound infection was not observed in two groups. The duration of antibiotic use in the drainage group was 5.0 d (2.0, 8.0) d, and the non-drainage group was 4.0 d (2.0, 5.0) d, the difference was not statistically significant ( Z=1.161, P=0.924). The hospital stays of the two groups were 18.5 d (15.0, 24.3) d and 19.0 d (13.0, 26.0) d, respectively, and the difference was not statistically significant ( Z=0.542, P=0.591). The operation time was 150.2±52.4 min in the drainage group and 138.8±41.2 min in the non-drainage group, and the difference was not statistically significant ( t=0.791, P=0.433). The blood loss in the drainage group was 604.6±387.3 ml, and the non-drainage group was 581.0±275.0 ml. The difference was not statistically significant ( t=0.276, P=0.784). The postoperative body temperature changes of patients in the drainage group and non-drainage group were on day 1 (37.5±0.5 ℃ vs. 37.4±0.4 ℃, t=0.322, P>0.05), day 3 (37.1±0.4 ℃ vs. 37.0±0.4 ℃, t=0.286, P>0.05), day 5 (37.0± 0.3 ℃ vs. 36.8±0.2 ℃, t=2.127, P>0.05), on the 7th day (36.8±0.2 ℃ vs. 36.7±0.4 ℃, t=0.491, P>0.05), the difference was not statistically significant. The time for suture removal of surgical incision was 14.1±0.6 d in the drainage group and 13.9±0.6 d in the non-drainage group, and the difference was not statistically significant ( t=1.072, P=0.329). The Harris scores of the two groups were 96 (91, 100) points for the drainage group and 96 (93, 97) points for the non-drainage group, and the difference was not statistically significant ( Z=0.107, P=0.607). Conclusion:There is no significant influence of the application of drainage on recovery of wound or function for patients with pelvic surgery.

With the continuous improvement and wide application of hospital information, more and more medical equipment is integrated into the hospital information systems, which brings new work contents and challenges for the traditional clinical engineers. This paper reviews and evaluates the current situation of networked medical equipment in the hospital. By applying the ISO 80001 and the MDS(Manufacturer Disclosore Statement for Medical Device Security), the paper puts forward the measures and suggestions for the security management of networked medical equipment.
Equipment Safety ; Equipment and Supplies ; Hospital Information Systems ; Safety Management