Objective To assess the anesthetic effect of different concentrations of hyperbaric ropivacaine used in lumbar anesthesia for elderly transurethral prostatic resection. Methods We randomly divided 58 elderly patients who un-derwent transurethral prostatic resection with ASA (American Surgical Association) physical status level Ⅰ-Ⅱ into 2 groups as group A and B, using numeric random table method. Each group includes 29 cases. After being punctured between L3-L4, patients were injected with 0.5%(group A) and 0.75%(group B) hyperbaric ropivacaine (diluted with 10%glucose) to the subarachnoid space in a speed of 0.1-0.3 mL/s and the overall dose was 12.5 mg in each case. Then the extents of sen-sory and motor block were compared between two groups, and their anesthesia effect and adverse reactions were also record-ed. Results Compared with group A, onset time of sensory block in group B was significantly shorter (P＜0.05), while onset time for motor block was of no significant difference;By contrast to group A, acting time of sensory block in group B pro-longed significantly (P＜0.05) while acting time of motor block was of no statistically significant difference(P>0.05);By con-trast to group A, the anesthesia effect of group B was more effective while the adverse reactions of the two groups was of no significant difference (P>0.05). Conclusion 0.75%hyperbaric ropivacaine in lumbar anesthesia for elderly patients un-dergoing transurethral prostatic resection could provide a better anesthesia and analgesia effect than 0.5%hyperbaric ropiva-caine without more significant adverse reactions.

Objective To explore the clinical effect of two different connecting tubes in hemodialysis combined with hemoperfusion. Methods A total of 25 patients were selected and divided into observation group and control group by self- control method. In the observation group, the hemodialysis combined with hemoperfusion was used 8 times, and the control group was treated with hemodialysis combined with hemoperfusion 8 times using conventional connecting tube. The time of the unloading of the perfusate and the amount of physiological saline required were compared between the two groups. There was no blood spillover during the unloading of the perfusate, the number of cases of allergic reaction during the treatment, and the coagulation of the dialyzer and the pipeline after the treatment. Results There was no allergic reaction in both groups. There was no significant difference between the two groups in the amount of saline needed to return blood (t=46.412, P=0.307). In the control group, there was 15 cases of blood spillover, while the observation group did not show blood spillover. There was significant difference between the two groups in unloading perfusion time(4.43±0.14)min vs. (3.02±0.11) min (t=10.784, P=0.003). The level Ⅰ and Ⅱ blood coagulation of dialyzer and pipeline was 12, 2 cases in the control group after the treatment and 5, 0 case in the observation group, no level Ⅲ blood coagulation cases, and there was a significant difference between the two groups (χ2=10.667, P<0.01). Conclusion In the hemodialysis combined with hemoperfusion therapy, multi-function group of the application effect is superior to conventional piping, is worthy of clinical application.

Objective:To observe the clinical efficacy of morpholine nidazole in the treatment of infection after radical resection of perianal abscess.Methods:Thirty patients diagnosed with perianal abscess were randomly divided into the observation group(given intravenous infusion of morpholine nidazole) and the control group(given intravenous infusion of ornidazole).Results:There was no significant difference in postoperative wound infection rate between the observation group and the control group ( P>0.05). There was significant difference in wound healing quality between the two groups on the 2 d and 7 d after the operation ( P<0.05). There was no significant difference in WBC and neutrophil counts between the two groups ( P>0.05), and the WBC and neutrophil counts in the two groups were significantly lower on the 7th day after the operation than before the treatment, and the observation group was significantly lower than the control group ( P<0.05). After treatment, there was no significant difference in the clearance rate of escherichia coli, klebsiella pneumoniae, bacteroides fragile and staphylococcus aureus in the observation group ( P>0.05), but there was significant difference in the overall bacterial clearance rate compared with the control group ( P<0.05). The incidence of adverse reactions in the observation group was significantly lower than that in the control group ( P<0.05). Conclusions:The use of morpholinidazole in patients with perianal abscess is effective and safe.

BACKGROUND:Preparation of calcium hydroxide paste for apexification of immature permanent teeth has recently achieved satisfactory clinical efficacy because of its advantages including simple-to-use, being wel proportioned and ful contact with dentin and root apical periodontal tissues after being guided into root canal. OBJECTIVE: To validate the clinical efficacy of apexification of immature permanent teeth with calcium hydroxide paste. METHODS:Thirty-four patients with periapical periodontitis caused by fracture of abnormal central cusp, consisting of 18 males and 16 females, aged 8-12 years, were included and they received apexification with calcium hydroxide paste. X-ray observation of the tooth apex was performed at 1, 3, 6, 12 and 24 months after operation. RESULTS AND CONCLUSION:Among the 34 cases, 32 cases were successful and 2 cases failed in apexification of immature permanent teeth with calcium hydroxide paste, the success rate was 94%. 16 cases had apical closure at 9-12 months, 15 cases finished apexification at 12-15 months, 1 case with severe infection finished induction at 18-21 months, and two cases could not finish induction at 24 months. During 2 years of folow-up period, there were no recurrence of periapical periodontitis, tooth loose and shedding, tooth fracture, root progressive absorption and other complications. Al the teeth had type II apical closure, and there were no type I and IV apical closure, and the rare cases had the type between II and III which was difficult to distinguish. Apexification with calcium hydroxide paste for immature permanent teeth with incomplete developed root can preserve the affected teeth, aleviate inflammation, and show good induction effects.

BACKGROUND:Studies have demonstrated that implantation of pile and different amount of residual tooth can change the stress distribution patterns of the tooth dentin within the residual root, and have an effect on the fracture mode of post-core restoration. OBJECTIVE:To evaluate the effects of the different amount of residual tooth on the fracture mode under oblique loading conditions in fiber pile composite resin core ful crown restoration. METHODS:Forty single rooted premolars extracted from orthodontic patients were divided into four groups after root canal preparation and filing. The plane going through buccal and lingual enamel cementum border midpoint and perpendicular to the long axis of the tooth was taken as the reference plane, so that the remaining amount of the tooth were 0, 1, 2, 3 mm. Fiber pile composite resin core metal ful restoration was conducted. After the repair, the oblique loading at 45° and at the rate of 1 mm/min was conducted. Fracture mode and load-displacement curve when root fracture occurred were recorded. RESULTS AND CONCLUSION:The tooth neck fracture usualy occurred in the 0 mm group, and central root fracture usualy occurred in the remaining three groups. There was a significant difference in the total fracture mode between 0 mm group and the remaining three groups (P < 0.05). There was no significant difference in the total fracture mode between 1, 2 and 3 mm groups (P> 0.05). In oblique loading conditions, when the remaining tooth structure was smal, the prosthesis was prone to have dental neck fracture. Fiber posts played a protective role in the tooth root, but the clinical probability of failure increased. The fracture mode was changed with the increase of residual tooth amount, transferring from the neck edge to the root. These results demonstrate that we must retain more tooth tissue from the crown in the restoration of residual root with fiber post-core crown.

Objective To explore how to reduce and quickly deal with all kinds of alarm in the dialysis process, to ensure the safety of dialysis, improve the coping ability of nurses, improve the quality of nursing and the satisfaction of patients. Methods Various kinds of alarm and nurse processing time in hemopurification center of our hospital from 2013 to 2014 were recorded and analyzed, the emergency treatment measures were found out, the coping methods were developed, the coping process were improved, and the training of nurses was strengthened. The various parameters were rerecorded and compared after training (2015 to 2016). Results The most common alarm in dialysis process was venous pressure alarm, accounting for 16.45%(15925/96831) of the total alarm, the lowest limit was 10.34%(10020/96831), and the highest limit was 6.11%(5905/96831). The total conductivity alarm was 10.33%(9969/968310), the nurse' s alarm processing time of the lowest limit was (53.11 ± 12.84) s, the highest limit was (136.77 ± 42.88 ) s, the conductivity alarm was (54.17 ± 33.55) s. After the training of nurses, the alarm frequency was reduced (χ2=3.164, P<0.05), the venous pressure alarm accounts for 14.69% (15415/104913) of the total alarm , the lowest limit was 9.52% (9985/104913),and the highest limit was 5.18%(5430/104913), the total conductivity alarm was 7.54%(7913/104913). The alarm processing time was shortened:the lowest limit was (40.94 ± 10.38) s, the highest limit was (119.15 ± 38.79) s (t=3.944, 3.304, P<0.05). The work efficiency and patient satisfaction degree were improved. Conclusions Through the summary and training of all kinds of alarm in the dialysis process, it can effectively reduce the alarm frequency of the dialysis process, improve the work efficiency of nurses, and improve the satisfaction degree of patients.

Objective: To investigate the relationships among psychological resilience, parental control, and behavioral problems in middle school students, aiming to provide evidencebased recommendations for the prevention and intervention of behavioral issues in middle school students, as well as for the development of related policies. Methods: A stratified cluster sampling method was used to select 2 745 participants from three cities in Guizhou Province with different levels of economic development from August to December 2021. The Child Behavior Checklist (CBCL), Parental Control Questionnaire, and Psychological Resilience Questionnaire were administered to junior high school students and their parents. A network analysis method was employed to construct a network analysis model of factors influencing behavioral problems. Results: The detection rate of behavioral problems among junior high school students in Guizhou Province was 22.62%. The scores for psychological resilience (goal focus, emotional control, positive cognition, family support, and interpersonal assistance) and proactive inquiry in behavior control were higher in the group without behavioral problems than in the group with behavioral problems. Scores for psychological control (inducing guilt, with drawing affection, and asserting authority) were higher in the group with behavioral problems than in the group without behavioral problems, with statistically significant differences (t=9.80, 17.76, 6.21, 12.20, 13.18, 6.28, 11.58, 11.10, 10.74, P<0.05). The network model showed that among the same variable factors, the strongest connection weight was between inducing guilt and withdrawing affection, with a weight of 0.79. Between different variables, there were negative correlation between behavioral problems and psychological resilience (goal focus, emotional control, positive cognition, family support, interpersonal assistance) and behavior control (proactive inquiry, behavioral restraint) with correlation coefficients (r=-0.25, -0.42, -0.16, -0.31, -0.33, -0.17, -0.03, P<0.05), respectively. There were positive correlation between psychological control factors (inducing guilt, withdrawing affection, and asserting authority) and behavioral problems (r=0.29, 0.27, 0.27), and a negative correlation between these psychological control factors and psychological resilience factors (goal focus, emotional control, positive cognition, family support, interpersonal assistance)(r=-0.53--0.13)(P<0.05). The strongest connection weight was between withdrawing affection and family support, with a connection weight of -0.53. Family support was an important bridge symptom connecting the entire behavioral problem network model, with a high centrality. Conclusions The detection rate of behavioral problems among junior high school students in Guizhou Province is relatively high. Assisting adolescents in establishing a supportive family environment facilitates the cultivation of their psychological resilience, thereby mitigating the occurrence of behavioral problems.