Objective:To explore the application effect of adjustable body position protection belt in patients undergoing not painless colonoscopy.Methods:A randomized and controlled trial was used, a total of 180 patients who planned to undergo not painless colonoscopy in the Endoscopy center, the First Hospital of Jiaxing from January to October 2022 were selected as the research objects. They were divided into the experimental group and the control group by the random number table method, with 90 cases in each group. The control group adopted the traditional method of colonoscopy body position placement, and on this basis, the experimental group used the adjustable body position protection belt to assist the patient body position placement. The maintenance rate of body position in colonoscopy, the cecal intubation time, the degree of intraoperative pain and the acceptance rate of re-examinationunder the same operating doctor and nurse were compared between the two groups.Results:The maintenance rate of body position in colonoscopy was 97.78%(88/90) in the experimental group and 58.89%(53/90) in the control group, the difference was statistically significant ( χ2 = 37.84, P<0.05). The cecal intubation time was (7.84 ± 4.39) min in the experimental group and (10.13 ± 5.85) min in the control group, the difference was statistically significant ( t = 2.98, P<0.05). The intraoperative pain score was 2.96 ± 1.39 in the experimental group and 4.28 ± 1.42 in the control group, the difference was statistically significant ( t = 6.31, P<0.05). The acceptance rate for re-colonoscopy was 88.89%(80/90) in the experimental group and 72.22%(65/90) in the control group, the difference was statistically significant ( χ2 = 7.98, P<0.05). Conclusions:Use of adjustable body position protection belt to assist body position placement before the patients undergoing not painless colonoscopy, it can improve the maintenance rate of body position during not painless colonoscopy, shorten the time of cecal intubation, reduce the intraoperative pain degree, and patients also have a higher willingness to undergo colonoscopy again.

Objective:To investigate the efficacy of internal fixation maintenance after fracture-related infection (FRI).Methods:Retrospectively analyzed were the data of 81 patients with deep FRI after 6 weeks of internal fixation who had been treated with hardware maintenance at Department of Orthopedics, The Second Hospital Affiliated to School of Medicine, Zhejiang University between 2013 and 2021. They were 61 males and 20 females, aged from 11 to 73 years (average, 11 years). After admission, the patients received bacterial culture, thorough debridement, negative pressure suction, soft tissue repair, and local and intravenous antibiotics. If a joint was affected by FRI, its cavity was cleaned and drained. Infection control and fracture healing were regularly observed in all patients. A treatment was considered successful when the internal fixation was maintained until fracture union, and considered as unsuccessful when the internal fixation was removed before fracture union. Risk factors associated with treatment failure were identified from gender, age, smoking, diabetes, fracture type, methicillin-resistant Staphylococcus aureus (MRSA) infection, methicillin-susceptible staphylococcus (MSSA) infection, Pseudomonas aeruginosa infection, Escherichia coli infection, infection by two kinds of bacteria, negative bacterial culture, early infection (within 2 weeks) and local use of antibiotics.Results:All patients were followed up for an average of 30 months (from 6 to 84 months). Fracture union was achieved in 62 (76.5%) patients with infection control and internal fixation retained. Masquelet technique was used to treat bone defects in 2 patients; a muscle flap or skin flap was used to reconstruct soft tissue coverage in 11 cases; fracture union was achieved by antibiotics and dressing changes in 2 patients with sinus tract. Amputation was performed in one unsuccessful case due to uncontrollable infection, and internal fixation was changed to external fixation in the other 18 unsuccessful cases, of which 3 achieved final bone union after application of Masquelet technique, 7 achieved final bone union after application of bone transfer technique, and 3 achieved soft tissue coverage after reconstruction with flap technique. Pseudomonas aeruginosa infection, open fractures and FRI for more than 2 weeks were high risk factors for failure in internal fixation maintenance ( P<0.05). Conclusions:If internal fixation is still stable and effective, hardware maintenance should be tried first in the patients with FRI within 6 weeks after fracture internal fixation. Muscle flap or skin flap surgery should be performed as soon as possible to effectively control infection and promote fracture union in the patients with soft tissue defects after thorough and effective debridement. History of open fracture, Pseudomonas aeruginosa infection, and FRI for over 2 weeks may be risk factors for failure in internal fixation maintenance.

Objective To investigate the value of echocardiography in assessing the right heart function of patients with chronic obstructive pulmonary disease (COPD). Methods Forty-four COPD patients who were treated in Beijing Anzhen Hospital of Capital Medical University, from April 2016 to April 2017, were selected as COPD group; and 12 healthy physical examiners were included in healthy control group during the same period. Patients were divided into COPD with pulmonary hypertension (PH) group and COPD without PH group. All subjects were routinely examined by transthoracic echocardiography. The parameters of right heart function of all subjects were measured by echocardiography according to 2010 guideline of American Society of Echocardiography (ASE). Independent sample t test was used to compare echocardiographic routine parameters and recommended parameters of ASE guideline between COPD group and healthy control group. One-way analysis of variance was used to compare the routine parameters of echocardiography and the recommended parameters of the ASE guide in the patients of COPD with PH group and COPD without PH group and the healthy control group. SNK-q test was used for comparison between groups. Results The right ventricle diameter (RVD) in group COPD was wider than that in healthy control group [(20.68±4.21) mm vs (18.17±1.75) mm], and the difference was statistically significant (t=2.92, P=0.005). There was no significant difference in the right ventricular outflow tract (RVOT), main pulmonary artery diameter (MPAD), left ventricular end-diastolic diameter (LVEDD), left ventricular end-systolic diameter (LVESD) and left ventricular ejection fraction (LVEF) between the COPD group and the healthy control group. Compared with the healthy control group, the diameter of right ventricle basal segment in the COPD group increased [(35.92±8.12) mm vs (27.75±3.17) mm], tricuspid annular plane systolic excursion (TAPSE) decreased [(19.61±4.08) mm vs (22.67±2.67) mm], right ventricular index of myocardial performance (RIMP) increased [(0.52±0.10) cm/s vs (0.43±0.04) cm/s)], and the differences were statistically significant (t=3.39, P=0.001; t=-2.44, P=0.019; t=4.31, P ＜ 0.001). There was no significant difference in right atrium area, E/A, E/E' and S' between COPD group and healthy control group. There was no significant difference in RVOT, RVD, MPAD, LVEDD, LVESD and LVEF in the patients of COPD with PH group and COPD without PH group and in the healthy control group. There was no significant difference in the right atrium area, E/A, E/E', TAPSE and S'. The right ventricular basal segment diameter and RIMP of COPD with PH group and COPD without PH group were higher than those of healthy control group [(37.99±9.66) mm, (34.47±6.70) mm vs (27.75±3.17) mm; (0.54±0.13) cm/s, (0.51±0.08) cm/s vs (0.43±0.04) cm/s]. The differences were statistically significant (q=6.960, 4.905, 5.796, 4.348, all P＜0.05). However, there was no significant difference in right ventricular basal segment diameter and RIMP between COPD with PH group and COPD without PH group. The RVWT of COPD with PH group was higher than that of COPD without PH group [(5.29±0.69) mm vs (4.54±0.70) mm], and the difference was statistically significant (t=3.313, P=0.002). Conclusions The method recommended in the ASE guidelines for this study was more sensitive than conventional methods for the detection of changes in the structure of the right heart. The change of the right ventricular structure was the first manifestation of right heart involvement in COPD patients, and then the systolic function of the right ventricle diminished. The long-term effect of pulmonary hypertension was thickening of the right ventricular wall at the early stage and then enlargement of the right ventricle.

OBJECTIVE:To develop a method for simultaneous determination of psoralen,isopsoralen,bergapten,imperato-rin,trimethylpsorale,neobavaisoflavone and bavachin in Qing'e pills. METHODS:HPLC method was adopted. The separation was performed on Kinetex-C18 column with mobile phase consisted of methanol-0.1% glacial acetic (gradient elution) at the flow rate of 1.0 mL/min. The detection wavelength was set at 248 nm. The column temperature was 30 ℃. The sample size was 20 μL. RESULTS:The linear ranges were 1.012-101.2 μg/mL for psoralen(r=0.9999),1.007-100.7 μg/mL for isopsoralen(r=0.9997), 1.010-101.0μg/mL for bergapten(r=0.9999),1.021-102.1μg/mL for imperatorin(r=0.9999),1.002-100.2μg/mL for trimethyl-psorale(r=0.9996),1.008-100.8 μg/mL for neobavaisoflavone(r=0.9999),1.025-102.5 μg/mL for bavachin(r=0.9998),re-spectively. The limits of quantitation were 0.15,0.15,0.30,0.30,0.15,0.30,0.30 μg/mL,and the limits of detection were 0.05, 0.05,0.10,0.10,0.05,0.10,0.10 μg/mL,respectively. RSDs of precision,stability and reproducibility tests were lower than 2.0%. The recoveries were 95.3%-99.6%(RSD=1.9%,n=6),96.1%-99.3%(RSD=1.2%,n=6),95.2%-98.4%(RSD=1.4%,n=6),95.4%-99.2%(RSD=1.5%,n=6),96.1%-99.3%(RSD=1.5%,n=6),95.6%-98.9%(RSD=1.4%,n=6), 95.2%-99.6%(RSD=1.6%,n=6),respectively. CONCLUSIONS:The method is simple and accurate,can be used for simultane-ous determination of 7 kinds of components in Qing'e pills.

OBJECTIVEThis study aims to identify the effects of corticotomy-assisted orthodontic premolar intrusion andevaluate the changes of root resorption and the alveolar bone.

METHODSBoth sides of the mandible of eight male Beagle dogswere randomly assigned into experimental and control groups. The third (P3) and fourth (P4) premolars were intruded withboth mini-screw implant anchorage (MIA) and corticotomy on the experimental side. By contrast, P3 and P4 were intrudedwith MIA alone on the control side. During pre-operation and after 2, 4, 8, and 12 weeks of orthodontic force applications,cone beam computed tomography was performed on every dog. The distance of tooth intrusion and root resorption of furcation, as well as the apex and height changes of the alveolar bone were measured and analyzed.

RESULTSThe intrusion distanceof premolars on the experimental side was greater than that on the control side (P < 0.05). The root of furcation and apex onboth sides occurred in root resorption, and the root resorption of the apex on the experimental side was lighter than that onthe control side after 12 weeks of force application (P < 0.05). The alveolar bone height decreased, and the height reductiondistance on the experimental side was greater than that on the control side after 8 and 12 weeks of force application (P < 0.05).

CONCLUSIONCorticotomy accelerates orthodontic molarintrusion and reduces root resorption.

Animals ; Bicuspid ; anatomy & histology ; Bone Screws ; Cone-Beam Computed Tomography ; Dogs ; Male ; Mandible ; Root Resorption ; Tooth Movement Techniques ; Tooth Root

BACKGROUNDExposure of adult mice to more than 95% O2 produces a lethal injury by 72 hours. Nuclear factor kappa B (NF-κB) is a transcriptional factor that plays a key role in the modulation of cytokine networks during hyperoxia-induced acute lung injury (ALI). Osteopontin (OPN) is a phosphorylated glycoprotein produced principally by macrophages. Studies have reported that exogenous OPN can maintain the integrity of the cerebral microvascular basement membrane and reduce brain damage through inhibiting NF-κB activities in the brain after subarachnoid hemorrhage. However, it is not clear whether OPN can reduce lung injury during ALI by inhibiting transcriptional signal pathways of NF-κB and consequent inhibition of inflammatory cytokines. Thus we examined the effects and mechanisms of recombinant OPN (r-OPN) on ALI.

METHODSNinety-six mice were randomly divided into phosphate buffered saline (PBS) and r-OPN groups. Mice were put in an oxygen chamber (>95% O2) and assessed for lung injury at 24, 48, and 72 hours. Expressions of NF-κB, matrix metalloproteinases 2 and 9 (MMP-2 and MMP-9), and tissue inhibitors of MMP-2 and MMP-9 (TIMP-1, TIMP-2) mRNA in lungs were examined with RT-PCR. Expression and distribution of NF-κB protein in lungs were measured with immunohistochemistry.

RESULTSExposure to hyperoxia for 72 hours induced more severe lung injury in the PBS group compared with the r-OPN group. Expression of NF-κB mRNA in the PBS group exposed to hyperoxia for 48 and 72 hours was significantly higher than the r-OPN group (P < 0.05). With 72-hour exposure, expression of TIMP-1 mRNA in the r-OPN group was significantly higher than that of the PBS group (P < 0.05). Expression of TIMP-2 mRNA in the r-OPN group at 48 and 72 hours was significantly higher than those in the PBS group (P < 0.05). After 72-hour exposure, expression of NF-κB protein in airway epithelium in the PBS group was significantly higher than that in the r-OPN group (P < 0.05).

CONCLUSIONr-OPN can inhibit the release and activation of MMPs through inhibition of the expression of NF-κB and promotion of the expression of TIMPs, and alleviate hyperoxia-induced ALI.

Acute Lung Injury ; genetics ; metabolism ; Animals ; Hyperoxia ; metabolism ; physiopathology ; Matrix Metalloproteinase 2 ; genetics ; metabolism ; Matrix Metalloproteinase 9 ; genetics ; metabolism ; Mice ; NF-kappa B ; genetics ; metabolism ; Osteopontin ; genetics ; metabolism ; Tissue Inhibitor of Metalloproteinase-1 ; genetics ; metabolism ; Tissue Inhibitor of Metalloproteinase-2 ; genetics ; metabolism

Background Exposure of adult mice to more than 95％ O2 produces a lethal injury by 72 hours.Nuclear factor kappa B (NF-κB) is a transcriptional factor that plays a key role in the modulation of cytokine networks during hyperoxia-induced acute lung injury (ALl).Osteopontin (OPN) is a phosphorylated glycoprotein produced principally by macrophages.Studies have reported that exogenous OPN can maintain the integrity of the cerebral microvascular basement membrane and reduce brain damage through inhibiting NF-κB activities in the brain after subarachnoid hemorrhage.However,it is not clear whether OPN can reduce lung injury during ALl by inhibiting transcriptional signal pathways of NF-κB and consequent inhibition of infiammatory cytokines.Thus we examined the effects and mechanisms of recombinant OPN (r-OPN) on ALl.Methods Ninety-six mice were randomly divided into phosphate buffered saline (PBS) and r-OPN groups.Mice were put in an oxygen chamber (＞95％ O2) and assessed for lung injury at 24,48,and 72 hours.Expressions of NF-κB,matrix metalloproteinases 2 and 9 (MMP-2 and MMP-9),and tissue inhibitors of MMP-2 and MMP-9 (TIMP-1,TIMP-2) mRNA in lungs were examined with RT-PCR.Expression and distribution of NF-κB protein in lungs were measured with immunohistochemistry.Results Exposure to hyperoxia for 72 hours induced more severe lung injury in the PBS group compared with the r-OPN group.Expression of NF-κB mRNA in the PBS group exposed to hyperoxia for 48 and 72 hours was significantly higher than the r-OPN group (P ＜0.05).With 72-hour exposure,expression of TIMP-1 mRNA in the r-OPN group was significantly higher than that of the PBS group (P ＜0.05).Expression of TIMP-2 mRNA in the r-OPN group at 48 and 72 hours was significantly higher than those in the PBS group (P ＜0.05).After 72-hour exposure,expression of NF-κB protein in airway epithelium in the PBS group was significantly higher than that in the r-OPN group (P ＜0.05).Conclusion r-OPN can inhibit the release and activation of MMPs through inhibition of the expression of NF-κB and promotion of the expression of TIMPs,and alleviate hyperoxia-induced ALl.

Objective To investigate the role of interstitial collagenase in the pathogenesis of acute lung injury induced by hyperoxia outside of sealed cages and breath room air,and to study the mechanism of The severity of lung injury.Methods Seventy-two C57BL/6 mice were divided into normal control group,hyperoxia for 24 hours group,hyperoxia for 48 hours and hyperoxia for 72 hours group randomly,18 mice in each group.The hyperoxia group exposedin sealed cages with＞95%oxygen,and the control group were put in the inspiratory room.The expression of interstitial collagenase mRNA and protein in lung tissues was studied by reverse transcript-polymerase chain reaction(RT-PCR)and immunohistochemistry.Results Hyperoxia caused acute lung injury in mice.by The expression of interstitial collagenase mRNA in lung tissues was increased after 24 hours of hyperoxia compared with their control group[0.59±0.11 vs 0.07±0.01,q=3.t5 P＜0.01],the expression was higher at 72 hours of hyperoxia(0.68±0.12,q=3.78 P＜0.01).Immunohistochemistry study showed interstitial collagenase protein was mainly expressed in cytoplasm of airway epithelial cells,while Ⅱ type alveolar epithelial cells mainly and vascular smooth muscle cells in hyperoxia mice.The expression of interstitial collagenase protein in airway epithelium significantly increased at 24 hours of hyperoxia compared with their control group[(28.54±9.60) vs (13.48±4.32)q=2.62 P＜0.05],and the expression level was lower after 48 and 72 hours of hyperoxia(20.32±5.68) vs, (15.24±4.65).Conclusion Hyperoxia cause acute lung injury in mice;interstitial collagenase play an important role in the development of hyperoxia-induced lung injury in mice.

Objective To determine diosgenin content in Jingangteng soft capsule by RP-HPLC.Methods A RP-HPLC was performed on a Shim-Pak VP-ODS C18column(5?m,4.6 mm? 250 mm),the mobile phase consisting of acetonitri le-H2O(87∶13) and the detected wavelength at 209 nm.Results A good line arity was obtained in the range 0.0595～ 14.875 ? g(r=0.99999) for diosgenin. The average recovery and RSD were 99.4 % and 2.0 % respectively(n=5).Concl usion The method is simple,rapid,stable and reliable,and can be used to determine diosgenin content in Jingangteng soft capsule.