Based on the motion differential equations of vibration and acoustic coupling system for thin elastic spherical shell with an elastic plate attached to its internal surface,in which Dirac-δ functions are employed to ...Based on the motion differential equations of vibration and acoustic coupling system for thin elastic spherical shell with an elastic plate attached to its internal surface,in which Dirac-δ functions are employed to introduce the moments and forces applied by the attachment on the surface of shell,by means of expanding field quantities as Legendre series,a semi-analytic solution is derived for the vibration and acoustic radiation from a submerged stiffened spherical shell with a deck-type internal plate,which has a satisfactory computational effectiveness and precision for an arbitrary frequency range.It is easy to analyze the effect of the internal plate on the acoustic radiation field by using the formulas obtained by the method proposed.It is concluded that the internal plate can significantly change the mechanical and acoustic characteristics of shell,and give the coupling system a very rich resonance frequency spectrum.Moreover,the method can be used to study the acoustic radiation mechanism in similar structures as the one studied here.展开更多
A numerical study of natural convection in an enclosure containing an eccentrically positioned inclined flat plate is performed,and the impact of eccentricity and inclination angle on flow and heat transfer are analyz...A numerical study of natural convection in an enclosure containing an eccentrically positioned inclined flat plate is performed,and the impact of eccentricity and inclination angle on flow and heat transfer are analyzed using a finite-difference code.The effect of eccentricity on the convection mechanism in the large and small spaces separated by the plate is explored,as well as the way in which the deviation between the directions of the plate and the buoyancy force determines the fluid motion.It is found that the total heat transfer exhibits a dramatic increase as the normalized eccentricity reaches e/D=0.3,namely,by 21.2%,13.4%,and 20.5%at α=0°,90°,and 180°,respectively,compared with the e/D=0.2 case,owing to the enhanced heat transfer by conduction,which dominates the local flow and heat transfer in the small region between the plate and the enclosure.When the plate is inclined,primary,secondary,and tertiary vortices are generated in the two halves of the enclosure,and the intensity of the vortices increases as they approach the horizontal centerline.Analysis of the local heat transfer demonstrates that the maximum local heat transfer rate occurs either at the top of the enclosure owing to natural convection or at the position close to the end of the plate,where conduction dominates.展开更多
Objective: to discuss the effect of minimally invasive percutaneous plate internal fixation and its influence on trauma control in the treatment of tibial fractures. Methods: 72 patients with tibial fracture who recei...Objective: to discuss the effect of minimally invasive percutaneous plate internal fixation and its influence on trauma control in the treatment of tibial fractures. Methods: 72 patients with tibial fracture who received surgical treatment in our hospital were divided into two groups by single and double number distribution method. The study group and routine group were treated with minimally invasive percutaneous plate internal fixation and open reduction and internal fixation respectively. The effects, satisfaction, surgical indexes, quality of life, complications and traumatic stress indexes of different groups of patients after different treatment methods were discussed. Results: by observing the effect and satisfaction degree of different groups of patients after different treatments, we know that the total effective rate and satisfaction degree of the patients in the study group were 94.45%, (95.65 ± 1.75) points, while the total effective rate of the patients in the routine group was 72.22%, (76.54 ± 0.65) points, and the data comparison was higher in the study group (P < 0.05);In the investigation of the quality of life of different groups of patients after different treatments, it was found that the quality of life of the patients in the study group was better (P < 0.05);In terms of the operative indexes and traumatic stress indexes of different groups of patients treated in different ways, the improvement effect of the operative indexes and traumatic stress indexes of the selected study group was better than that of the routine group (P < 0.05);Comparing the complications of different groups of patients after different ways of treatment, it shows that the probability of complications in the study group is lower than that in the routine group (P < 0.05). Conclusion: in order to improve the therapeutic effect, satisfaction and quality of life of patients with tibial fracture, reduce the probability of complications, and improve various indexes of operation and traumatic stress, minimally invasive percutaneous plate internal fixation is needed, and its application is very significant.展开更多
The purpose of this study was to observe the clinical efficacy of umbilical cord in the treatment of Jinri capsule and analyze its effect on postoperative injury and bone metabolism. Methods 90 cases of SAP tree fract...The purpose of this study was to observe the clinical efficacy of umbilical cord in the treatment of Jinri capsule and analyze its effect on postoperative injury and bone metabolism. Methods 90 cases of SAP tree fracture were randomly divided into two groups according to 1:1. In the control group, 45 patients were treated with MIPO, and 45 patients were treated with Jintian capsule based on MIPO for 6 weeks. Organic volume content (VOC), bone mass number (TB.n), elastic bone stress (ES) and calcium (BFP) were compared according to bone volume ratio (BV/TV) before and 6 weeks after operation. Six months postoperatively, bone protective function (OPG), tartrate phosphatase (TRAP), K collagen (KTH) and shoulder recovery were observed. Results Within 6 weeks after treatment, bone quality indexes such as TV were significantly lower than those in control group (P<0.05), and bone quality indexes such as VOC and TBC were significantly lower than those in control group (P<0.05). Significantly lower than control group (P<0.05). N was significantly higher than that of control group (P<0.05). The osteogenesis rates of BGP and OPG were higher than those of the control group (P<0.05), and the osteogenesis rates of TRAP and CTX were significantly lower than those of the control group (P<0.05). Were compared between the two groups before and 6 weeks after operation. Six months after surgery, the observation group had better function recovery, and the constant Murley score was significantly higher than that of the control group. Conclusion MIPO combined with Jintiange capsule can significantly improve the function recovery effect of shoulder joint, effectively stabilize bone mass index, promote the formation of bone structure, quickly recover bone metabolism function, and finally achieve fracture healing. It is worthy of clinical application.展开更多
Objective: To investigate the effectiveness of the plate screw internal fixation technique on the clinical outcomes of patients with traumatic fractures of long bones in the lower extremities. Methods: From January 20...Objective: To investigate the effectiveness of the plate screw internal fixation technique on the clinical outcomes of patients with traumatic fractures of long bones in the lower extremities. Methods: From January 2022 to December 2023, 70 patients with traumatic fractures of long bones in the lower extremities were admitted to the hospital and randomly divided into two groups: the control group and the observation group, each consisting of 35 cases. The control group underwent traditional closed interlocking intramedullary nailing, while the observation group received internal fixation with steel plates and screws. Relevant surgical indicators, treatment effectiveness, and postoperative complication rates were compared between the two groups. Results: The observation group exhibited significantly short surgical duration (80.65 ± 5.01 vs. 88.36 ± 5.26 minutes), fracture healing time (13.27 ± 0.32 vs. 15.52 ± 0.48 weeks), and hospitalization days (10.49 ± 1.13 vs. 16.57 ± 1.15 days) compared to the control group (P = 0.000). The effective treatment rate was significantly higher in the observation group (29/82.86%) than in the control group (21/60.00%), with a significant difference observed (χ2 = 4.480, P = 0.034). Additionally, the complication rate in the observation group (2/5.71%) was significantly lower than that in the control group (8/22.86%), with a correlated difference (χ2 = 4.200, P = 0.040). Conclusion: The plate screw internal fixation technique demonstrates significant clinical efficacy in treating traumatic fractures of long bones in the lower extremities. It improves the healing rate, reduces complications, and represents a safe and effective treatment strategy worthy of widespread use and application.展开更多
Objective: to summarize the surgical treatment methods of comminuted calcaneal fracture and the effect differences of different surgical methods. Methods: patients with calcaneal fractures admitted to our hospital and...Objective: to summarize the surgical treatment methods of comminuted calcaneal fracture and the effect differences of different surgical methods. Methods: patients with calcaneal fractures admitted to our hospital and confirmed for surgical treatment were selected. All patients were comminuted fractures and met the requirements of surgical indications. The cases were selected from June 2018 to June 2020, and the conventional group took incision reduction surgery based on L-type incision. The experimental group performed minimally invasive plate internal fixation with plate screws according to the posterior heel or the tarsal sinus incision position. When observed after the operation, the items involved included the function of the heel, the recovery status of the calcaneus, the surgery-related indicators, and the complications occurring during and after the surgery. Results: the patients of the experimental group were significantly higher than the height. Bolher and Gissen angle were better than the conventional group in March and June, P <0.05;the time, bleeding volume, incision length, hospitalization time and related complications were significantly better than the conventional group, P <0.05. Conclusion: minimally invasive plate and screw internal fixation can effectively treat comminuted calcaneal fracture, which has a significant effect on the foot and ankle function, and obviously acts on the fracture site and function.展开更多
To assess the effect of using buttress plate associated with antografting of fibula and iliac bone for the treatment of distal femoral C3 type fracture.Methods Seventeen cases of distal femoral C3 type fracture usin...To assess the effect of using buttress plate associated with antografting of fibula and iliac bone for the treatment of distal femoral C3 type fracture.Methods Seventeen cases of distal femoral C3 type fracture using buttress plate associated with antografting of fibula and iliac bone were analyzed retrospectively.Results All cases were followed up for an average of 24 months（8～55 months）.The average time of octets bridge forming were 4 months（3～5 months） while the average time for bone union were 8 months （6～14 months）.According to Shelbourne rating system,result of all 18 cases were excellent and no malunion,infection were found.Conclusion Buttress plate associated with antografting of fibula and iliac bone is an effective alternative for the treatment of distal femoral C3 type fracture.It can provide more stable fixation to the bone and earlier functional exercises can be achieved.5 refs,3 figs,1 tab.展开更多
Objective:To evaluate the therapeutic effect of dynamic fixation with a hook plate-double loop plate internal fixation system for high-energy acromioclavicular joint complex dislocation(denoted as HACD,i.e.,Rockwood t...Objective:To evaluate the therapeutic effect of dynamic fixation with a hook plate-double loop plate internal fixation system for high-energy acromioclavicular joint complex dislocation(denoted as HACD,i.e.,Rockwood type III-V dislocation).Methods:Fifty-eight patients with HACD were selected and evenly divided by drawing lots.The experimental group underwent ligament reconstruction treatment,while the reference group received hook plate fixation treatment.The efficacy and other indicators were compared between the groups.Results:The overall effective rates between the groups were similar(P>0.05).The experimental group had a longer surgical duration,lower pain scores at 6 months postoperatively,higher shoulder joint function scores,and a lower complication rate,with P<0.05 when compared between groups.Conclusion:The effectiveness of the double loop plate internal fixation system ligament reconstruction treatment for patients with HACD is comparable to that of hook plate fixation treatment.Although the surgical duration is slightly longer,postoperative pain is milder,facilitating the recovery of shoulder joint function in patients and offering higher safety.展开更多
Objective:To analyze the effect of locking compression plate on the success rate of operation and the time of postoperative recovery.Methods:120 patients with limb fractures from March 2018 to March 2020 were randomly...Objective:To analyze the effect of locking compression plate on the success rate of operation and the time of postoperative recovery.Methods:120 patients with limb fractures from March 2018 to March 2020 were randomly divided into control group(60 cases)and observation group(60 cases).The control group was treated with plate screw internal fixation,The observation group used locking compression plate internal fixation,Compare the effect of treatment,the success rate of operation and the time of postoperative recovery.results:compared the effective rate of the two groups,the observation group(93.33%)was significantly higher than the control group(75.00%).Compared with the two groups,the success rate of operation and the time of postoperative recovery,the observed composition power was higher than that of the control group,and the postoperative recovery time was lower than that of the control group,P<0.05.Conclusion:The use of locking compression plate for the treatment of limb fracture can significantly increase the probability of successful operation,shorten the recovery time after operation,the overall curative effect is ideal,and the clinical popularization value is high.展开更多
Objectives To study the effects of applying locking compression plates in the treatment of patients with limb fractures on postoperative fracture healing.Methods:115 patients with limb fractures who were treated in ou...Objectives To study the effects of applying locking compression plates in the treatment of patients with limb fractures on postoperative fracture healing.Methods:115 patients with limb fractures who were treated in our hospital from November 2019 to November 2020 were selected.In order to study the effective treatment method,the random-number table method was used in this study to divide the patients into two groups,namely the experimental group and the control group,and the locking compression plate treatment method and the pure plate and screw internal fixation treatment method were administered respectively to study their clinical application effects.Results:Compared with the control group,patients in the experimental group had a lower incidence of complications,shorter hospitalizations and shorter recovery time.Meanwhile,the experimental group had a better quality of recovery,and all data were significantly different from those of the control group,P<0.05,the intervention effect of the experimental group was better.Conclusion:The application of the locking compression plate in the treatment of patients with limb fractures is more conducive to promoting the postoperative healing of the patients'fractures,reducing the incidence of postoperative complications,and promoting the rapid recovery of patients,which has positive significance for clinical development.展开更多
To elucidate the effect of the internal fixation plates on the local bone blood sapply, we used microangiography and scanning electron microscopy to observe the morphological changes of microcirculation in the cortica...To elucidate the effect of the internal fixation plates on the local bone blood sapply, we used microangiography and scanning electron microscopy to observe the morphological changes of microcirculation in the cortical bones obtained from intact rabbit tibiae on which plates of two different stiffness had been fixed for comparison. The results indicated that both rigid stainless steel plate and less rigid methyl methacrylate plate could induce the bone microcirculation under the plate to undergo a process from early depression to late reactive recruitment. The features of the microcircuiation recruitment such as vascular number, arrangement and dilatation varied with plates of different stiffness and were more obvious in the cortex fixed by rigid stainless steel plate.展开更多
The micro-interconnected fluidized bed(MIFB)was designed to improve the evaluation condition of oxygen carrier,which is difficult to perform in a lab-scale interconnected fluidized bed because of the large demand for ...The micro-interconnected fluidized bed(MIFB)was designed to improve the evaluation condition of oxygen carrier,which is difficult to perform in a lab-scale interconnected fluidized bed because of the large demand for bed inventory.The reduction of bed inventory in the MIFB was mainly achieved by the appropriate miniaturization of the reactor size,in which the wall effect and operating flexibility should be taken into consideration.With hematite serving as the oxygen carrier,stable and flexible fluidization could be realized with 342.9 g of bed inventory.Internal perforated plates were arranged in the middle of the reactor to improve gas-solid distribution,which also could restrain the slugging formation and increase the particle residence time by 28.9%.A different fluidization phenomenon was observed in this two-stage reactor in which the particle fluidization was reconstructed in the upper chamber.Throughout 48 h of cold operation,the hematite oxygen carrier attrition rate was evaluated as 0.151 wt.%/h corresponding to 660 h lifetime,where 12.5%of particle attrition was contributed by internal perforated plates.An excellent fitting performance was found between the pressure difference in the risers and the upward particle flow,but the correction factor should be adjusted according to the fluidization flow.展开更多
基金Project supported by the National Natural Science Foundation of China(No.10172038).
文摘Based on the motion differential equations of vibration and acoustic coupling system for thin elastic spherical shell with an elastic plate attached to its internal surface,in which Dirac-δ functions are employed to introduce the moments and forces applied by the attachment on the surface of shell,by means of expanding field quantities as Legendre series,a semi-analytic solution is derived for the vibration and acoustic radiation from a submerged stiffened spherical shell with a deck-type internal plate,which has a satisfactory computational effectiveness and precision for an arbitrary frequency range.It is easy to analyze the effect of the internal plate on the acoustic radiation field by using the formulas obtained by the method proposed.It is concluded that the internal plate can significantly change the mechanical and acoustic characteristics of shell,and give the coupling system a very rich resonance frequency spectrum.Moreover,the method can be used to study the acoustic radiation mechanism in similar structures as the one studied here.
文摘A numerical study of natural convection in an enclosure containing an eccentrically positioned inclined flat plate is performed,and the impact of eccentricity and inclination angle on flow and heat transfer are analyzed using a finite-difference code.The effect of eccentricity on the convection mechanism in the large and small spaces separated by the plate is explored,as well as the way in which the deviation between the directions of the plate and the buoyancy force determines the fluid motion.It is found that the total heat transfer exhibits a dramatic increase as the normalized eccentricity reaches e/D=0.3,namely,by 21.2%,13.4%,and 20.5%at α=0°,90°,and 180°,respectively,compared with the e/D=0.2 case,owing to the enhanced heat transfer by conduction,which dominates the local flow and heat transfer in the small region between the plate and the enclosure.When the plate is inclined,primary,secondary,and tertiary vortices are generated in the two halves of the enclosure,and the intensity of the vortices increases as they approach the horizontal centerline.Analysis of the local heat transfer demonstrates that the maximum local heat transfer rate occurs either at the top of the enclosure owing to natural convection or at the position close to the end of the plate,where conduction dominates.
文摘Objective: to discuss the effect of minimally invasive percutaneous plate internal fixation and its influence on trauma control in the treatment of tibial fractures. Methods: 72 patients with tibial fracture who received surgical treatment in our hospital were divided into two groups by single and double number distribution method. The study group and routine group were treated with minimally invasive percutaneous plate internal fixation and open reduction and internal fixation respectively. The effects, satisfaction, surgical indexes, quality of life, complications and traumatic stress indexes of different groups of patients after different treatment methods were discussed. Results: by observing the effect and satisfaction degree of different groups of patients after different treatments, we know that the total effective rate and satisfaction degree of the patients in the study group were 94.45%, (95.65 ± 1.75) points, while the total effective rate of the patients in the routine group was 72.22%, (76.54 ± 0.65) points, and the data comparison was higher in the study group (P < 0.05);In the investigation of the quality of life of different groups of patients after different treatments, it was found that the quality of life of the patients in the study group was better (P < 0.05);In terms of the operative indexes and traumatic stress indexes of different groups of patients treated in different ways, the improvement effect of the operative indexes and traumatic stress indexes of the selected study group was better than that of the routine group (P < 0.05);Comparing the complications of different groups of patients after different ways of treatment, it shows that the probability of complications in the study group is lower than that in the routine group (P < 0.05). Conclusion: in order to improve the therapeutic effect, satisfaction and quality of life of patients with tibial fracture, reduce the probability of complications, and improve various indexes of operation and traumatic stress, minimally invasive percutaneous plate internal fixation is needed, and its application is very significant.
文摘The purpose of this study was to observe the clinical efficacy of umbilical cord in the treatment of Jinri capsule and analyze its effect on postoperative injury and bone metabolism. Methods 90 cases of SAP tree fracture were randomly divided into two groups according to 1:1. In the control group, 45 patients were treated with MIPO, and 45 patients were treated with Jintian capsule based on MIPO for 6 weeks. Organic volume content (VOC), bone mass number (TB.n), elastic bone stress (ES) and calcium (BFP) were compared according to bone volume ratio (BV/TV) before and 6 weeks after operation. Six months postoperatively, bone protective function (OPG), tartrate phosphatase (TRAP), K collagen (KTH) and shoulder recovery were observed. Results Within 6 weeks after treatment, bone quality indexes such as TV were significantly lower than those in control group (P<0.05), and bone quality indexes such as VOC and TBC were significantly lower than those in control group (P<0.05). Significantly lower than control group (P<0.05). N was significantly higher than that of control group (P<0.05). The osteogenesis rates of BGP and OPG were higher than those of the control group (P<0.05), and the osteogenesis rates of TRAP and CTX were significantly lower than those of the control group (P<0.05). Were compared between the two groups before and 6 weeks after operation. Six months after surgery, the observation group had better function recovery, and the constant Murley score was significantly higher than that of the control group. Conclusion MIPO combined with Jintiange capsule can significantly improve the function recovery effect of shoulder joint, effectively stabilize bone mass index, promote the formation of bone structure, quickly recover bone metabolism function, and finally achieve fracture healing. It is worthy of clinical application.
文摘Objective: To investigate the effectiveness of the plate screw internal fixation technique on the clinical outcomes of patients with traumatic fractures of long bones in the lower extremities. Methods: From January 2022 to December 2023, 70 patients with traumatic fractures of long bones in the lower extremities were admitted to the hospital and randomly divided into two groups: the control group and the observation group, each consisting of 35 cases. The control group underwent traditional closed interlocking intramedullary nailing, while the observation group received internal fixation with steel plates and screws. Relevant surgical indicators, treatment effectiveness, and postoperative complication rates were compared between the two groups. Results: The observation group exhibited significantly short surgical duration (80.65 ± 5.01 vs. 88.36 ± 5.26 minutes), fracture healing time (13.27 ± 0.32 vs. 15.52 ± 0.48 weeks), and hospitalization days (10.49 ± 1.13 vs. 16.57 ± 1.15 days) compared to the control group (P = 0.000). The effective treatment rate was significantly higher in the observation group (29/82.86%) than in the control group (21/60.00%), with a significant difference observed (χ2 = 4.480, P = 0.034). Additionally, the complication rate in the observation group (2/5.71%) was significantly lower than that in the control group (8/22.86%), with a correlated difference (χ2 = 4.200, P = 0.040). Conclusion: The plate screw internal fixation technique demonstrates significant clinical efficacy in treating traumatic fractures of long bones in the lower extremities. It improves the healing rate, reduces complications, and represents a safe and effective treatment strategy worthy of widespread use and application.
文摘Objective: to summarize the surgical treatment methods of comminuted calcaneal fracture and the effect differences of different surgical methods. Methods: patients with calcaneal fractures admitted to our hospital and confirmed for surgical treatment were selected. All patients were comminuted fractures and met the requirements of surgical indications. The cases were selected from June 2018 to June 2020, and the conventional group took incision reduction surgery based on L-type incision. The experimental group performed minimally invasive plate internal fixation with plate screws according to the posterior heel or the tarsal sinus incision position. When observed after the operation, the items involved included the function of the heel, the recovery status of the calcaneus, the surgery-related indicators, and the complications occurring during and after the surgery. Results: the patients of the experimental group were significantly higher than the height. Bolher and Gissen angle were better than the conventional group in March and June, P <0.05;the time, bleeding volume, incision length, hospitalization time and related complications were significantly better than the conventional group, P <0.05. Conclusion: minimally invasive plate and screw internal fixation can effectively treat comminuted calcaneal fracture, which has a significant effect on the foot and ankle function, and obviously acts on the fracture site and function.
文摘To assess the effect of using buttress plate associated with antografting of fibula and iliac bone for the treatment of distal femoral C3 type fracture.Methods Seventeen cases of distal femoral C3 type fracture using buttress plate associated with antografting of fibula and iliac bone were analyzed retrospectively.Results All cases were followed up for an average of 24 months（8～55 months）.The average time of octets bridge forming were 4 months（3～5 months） while the average time for bone union were 8 months （6～14 months）.According to Shelbourne rating system,result of all 18 cases were excellent and no malunion,infection were found.Conclusion Buttress plate associated with antografting of fibula and iliac bone is an effective alternative for the treatment of distal femoral C3 type fracture.It can provide more stable fixation to the bone and earlier functional exercises can be achieved.5 refs,3 figs,1 tab.
文摘Objective:To evaluate the therapeutic effect of dynamic fixation with a hook plate-double loop plate internal fixation system for high-energy acromioclavicular joint complex dislocation(denoted as HACD,i.e.,Rockwood type III-V dislocation).Methods:Fifty-eight patients with HACD were selected and evenly divided by drawing lots.The experimental group underwent ligament reconstruction treatment,while the reference group received hook plate fixation treatment.The efficacy and other indicators were compared between the groups.Results:The overall effective rates between the groups were similar(P>0.05).The experimental group had a longer surgical duration,lower pain scores at 6 months postoperatively,higher shoulder joint function scores,and a lower complication rate,with P<0.05 when compared between groups.Conclusion:The effectiveness of the double loop plate internal fixation system ligament reconstruction treatment for patients with HACD is comparable to that of hook plate fixation treatment.Although the surgical duration is slightly longer,postoperative pain is milder,facilitating the recovery of shoulder joint function in patients and offering higher safety.
文摘Objective:To analyze the effect of locking compression plate on the success rate of operation and the time of postoperative recovery.Methods:120 patients with limb fractures from March 2018 to March 2020 were randomly divided into control group(60 cases)and observation group(60 cases).The control group was treated with plate screw internal fixation,The observation group used locking compression plate internal fixation,Compare the effect of treatment,the success rate of operation and the time of postoperative recovery.results:compared the effective rate of the two groups,the observation group(93.33%)was significantly higher than the control group(75.00%).Compared with the two groups,the success rate of operation and the time of postoperative recovery,the observed composition power was higher than that of the control group,and the postoperative recovery time was lower than that of the control group,P<0.05.Conclusion:The use of locking compression plate for the treatment of limb fracture can significantly increase the probability of successful operation,shorten the recovery time after operation,the overall curative effect is ideal,and the clinical popularization value is high.
文摘Objectives To study the effects of applying locking compression plates in the treatment of patients with limb fractures on postoperative fracture healing.Methods:115 patients with limb fractures who were treated in our hospital from November 2019 to November 2020 were selected.In order to study the effective treatment method,the random-number table method was used in this study to divide the patients into two groups,namely the experimental group and the control group,and the locking compression plate treatment method and the pure plate and screw internal fixation treatment method were administered respectively to study their clinical application effects.Results:Compared with the control group,patients in the experimental group had a lower incidence of complications,shorter hospitalizations and shorter recovery time.Meanwhile,the experimental group had a better quality of recovery,and all data were significantly different from those of the control group,P<0.05,the intervention effect of the experimental group was better.Conclusion:The application of the locking compression plate in the treatment of patients with limb fractures is more conducive to promoting the postoperative healing of the patients'fractures,reducing the incidence of postoperative complications,and promoting the rapid recovery of patients,which has positive significance for clinical development.
文摘To elucidate the effect of the internal fixation plates on the local bone blood sapply, we used microangiography and scanning electron microscopy to observe the morphological changes of microcirculation in the cortical bones obtained from intact rabbit tibiae on which plates of two different stiffness had been fixed for comparison. The results indicated that both rigid stainless steel plate and less rigid methyl methacrylate plate could induce the bone microcirculation under the plate to undergo a process from early depression to late reactive recruitment. The features of the microcircuiation recruitment such as vascular number, arrangement and dilatation varied with plates of different stiffness and were more obvious in the cortex fixed by rigid stainless steel plate.
基金The authors gratefully acknowledge the support of this research work by National Natural Science Foundation of China(Grants51561125001 and 51476029).
文摘The micro-interconnected fluidized bed(MIFB)was designed to improve the evaluation condition of oxygen carrier,which is difficult to perform in a lab-scale interconnected fluidized bed because of the large demand for bed inventory.The reduction of bed inventory in the MIFB was mainly achieved by the appropriate miniaturization of the reactor size,in which the wall effect and operating flexibility should be taken into consideration.With hematite serving as the oxygen carrier,stable and flexible fluidization could be realized with 342.9 g of bed inventory.Internal perforated plates were arranged in the middle of the reactor to improve gas-solid distribution,which also could restrain the slugging formation and increase the particle residence time by 28.9%.A different fluidization phenomenon was observed in this two-stage reactor in which the particle fluidization was reconstructed in the upper chamber.Throughout 48 h of cold operation,the hematite oxygen carrier attrition rate was evaluated as 0.151 wt.%/h corresponding to 660 h lifetime,where 12.5%of particle attrition was contributed by internal perforated plates.An excellent fitting performance was found between the pressure difference in the risers and the upward particle flow,but the correction factor should be adjusted according to the fluidization flow.
