(Quasi-)closed-form results for the statistical properties of unmanned aerial vehicle(UAV)airto-ground channels are derived for the first time using a novel spatial-vector-based method from a threedimensional(3-D)arbi...(Quasi-)closed-form results for the statistical properties of unmanned aerial vehicle(UAV)airto-ground channels are derived for the first time using a novel spatial-vector-based method from a threedimensional(3-D)arbitrary-elevation one-cylinder model.The derived results include a closed-form expression for the space-time correlation function and some quasi-closed-form ones for the space-Doppler power spectrum density,the level crossing rate,and the average fading duration,which are shown to be the generalizations of those previously obtained from the two-dimensional(2-D)one-ring model and the 3-D low-elevation one-cylinder model for terrestrial mobile-to-mobile channels.The close agreements between the theoretical results and the simulations as well as the measurements validate the utility of the derived channel statistics.Based on the derived expressions,the impacts of some parameters on the channel characteristics are investigated in an effective,efficient,and explicable way,which leads to a general guideline on the manual parameter estimation from the measurement description.展开更多
S The methane emission flux from rice paddies was simultaneously measured with automatic and manual methods in the suburban of Suzhou. Both methods were based on the static chamber/GC-FID techniques. Detail analysi...S The methane emission flux from rice paddies was simultaneously measured with automatic and manual methods in the suburban of Suzhou. Both methods were based on the static chamber/GC-FID techniques. Detail analysis of the experimental results indicates: a) The data of methane emission measured with the automatic method is reliable. b) About 11 or 19 o′clock of local time is recommended as the optimum sampling time for the manual spot measurement of methane emission from rice paddies. The methane emission fluxes measured by manual sampling at local time other than the optimum time have to be corrected. The correction coefficient may be determined by automatic and continuous measurement. c) In order to get a more accurate result, an empirical correction factor, such as 18%, is recommended to correct the seasonally total amount of measured methane emission by enlarging the automatically measured data or reducing the manually measured ones.展开更多
Background: Recent obstetrical practice tends to avoid the use of manual uterine fundal pressure (MUFP);however, data showed that MUFP is actually employed. We here attempted 1) to determine the obstetricians’ attitu...Background: Recent obstetrical practice tends to avoid the use of manual uterine fundal pressure (MUFP);however, data showed that MUFP is actually employed. We here attempted 1) to determine the obstetricians’ attitudes towards MUFP via questionnaire, and 2) to examine whether MUFP shortens the 2nd stage of labor, with the latter tested as a pilot study. Methods: A questionnaire-based study was carried out (n = 122) at meetings of Obstetrics on May 5, 2017. Then, we conducted a pilot case-control study from August 23 to September 6, 2020. Participants (n = 29) were divided into two groups;women who did and did not want MUFP;i.e., MUFP (n = 14) vs. (Non-MUFP) group (n = 15). Results: Of 122 doctors, 99.18% (121/122) used MUFP at cesarean section. 95.90% (117/122) of institutions used MUFP in spontaneous delivery. 95.08% (116/122) obstetricians considered MUFP effective and helpful. 85.24% (104/122) considered that MUFP should be employed after station +3. In the case control study, MUFP vs. Non-MUFP group showed the second-stage-duration of 58.5 (50.25 - 71.25) vs. 48 (39 - 59) minutes, without statistical significance (P = 0.101). However, importantly, MUFP, compared with Non-MUFP group, showed a significantly shorter duration from head visible on introitus (apparition) to delivery;i.e., 21.26 ± 7.32 vs. 30.13 ± 10.61 minutes (P = 0.014). Conclusions: MUFP is still used widely and MUFP shortened the duration of head apparition to delivery time. Larger-sample studies are needed to confirm the efficacy and safety of MUFP.展开更多
Taking a heavy-duty truck as a research platform,the changing characteristics of shifting force,shift time,and slipping work are obtained through theoretical analysis and manual shift test of a real vehicle. Based on ...Taking a heavy-duty truck as a research platform,the changing characteristics of shifting force,shift time,and slipping work are obtained through theoretical analysis and manual shift test of a real vehicle. Based on the analysis of the test results,a gear-shifting control strategy of the hydraulic automated shift control system is designed and experimentally verified on the bench. By optimizing the control parameters of high-speed switching valves,a control strategy and parameters are obtained,which can meet the requirements of dynamic performance and reliability.展开更多
Of all the methods available for the management of first trimester miscarriages, manual vacuum aspiration is the safest, cheapest and fastest. However, pain caused by manipulation of cervix and uterine suction makes i...Of all the methods available for the management of first trimester miscarriages, manual vacuum aspiration is the safest, cheapest and fastest. However, pain caused by manipulation of cervix and uterine suction makes it uncomfortable. We compared the clinical effectiveness and adverse effects of combination of non-selective COX inhibitor (Diclofenac Sodium 50 mg) and opioid (Pentazocine 60 mg) to commonly used opiod only (Pentazocine 60 mg) in daily practice of pain management for the treatment of incomplete abortion with manual vacuum aspiration. This was a randomized double-blind controlled trial conducted in Gynaecological Emergency clinic of Aminu Kano Teaching Hospital Kano, Nigeria. Comparison of the level of pain experienced during the procedure revealed statistically significant difference in the level of pain reported among the groups (P-value 0.03). Comparison of severity of pain perception and patients’ satisfaction was found to be negatively related (P < 0.000001). The present study shows that the use of combined analgesia compared to single agent analgesia during MVA is more, safe, significantly reduced pain and improved patient satisfaction during the procedure.展开更多
Objective: The fundal pressure exerted by the assistant to deliver fetal head is often painful to the patient. This study assesses the use of double blade forceps in delivery of fetal head at time of elective Cesarean...Objective: The fundal pressure exerted by the assistant to deliver fetal head is often painful to the patient. This study assesses the use of double blade forceps in delivery of fetal head at time of elective Cesarean Section (CS). Methods: A prospective single-blinded randomized controlled trial was conducted among 150 women with repeat elective CS at Ain Shams university hospital, Air Force Specialized hospital and October 6th university hospital. Women were classified into 3 groups (each 50 women). Forceps group: A double blade of forceps was used without fundal pressure. Single blade group: single blade of forceps was used assisted by fundal pressure. Manual group: manual extraction was used assisted by fundal pressure. The outcome of study were;Pain expectation score , pain score during delivery of head, unintended uterine extension, uterine vessels injury and need for additional stitches. The collected data were statistically analyzed using SPSS version 20. Results: High Statistically significant difference in pain score during delivery of head in favor of forceps group (P = 0.001). No differences were found among 3 groups as regarding pain expectation, uterine extension, uterine vessel injury and in need of haemostatic stitches (P > 0.05). Conclusion: Use of double blade forceps is less painful for the patients during delivery of head in CS.展开更多
Background: Osteopathic manual treatment (OMT) has been reported to have positive initial results for subjects with chronic non-specific back pain in a rural safety-net hospital. However, the effects of OMT following ...Background: Osteopathic manual treatment (OMT) has been reported to have positive initial results for subjects with chronic non-specific back pain in a rural safety-net hospital. However, the effects of OMT following initial treatment have not been reported. Objective: To determine the effects of OMT for patients with chronic non-specific back pain in a rural safety-net hospital setting for an initial post-clinical and follow-up visit. Methods: A longitudinal, rolling admission, eleven-year study of cohort study with a primary complaint of chronic, non-specific back pain that had plateaued in improvement for a minimum of six months. One hundred and fifty-one subjects completed the first two study visits necessary for data collection, and fifty-nine subjects completed the follow-up visit after six months. Results: A two-way, mixed model, repeated measures ANOVA with pre- post1 and post2 (follow-up) treatment as the within variable and sex as the between subject variable showed a significant main effect from pre- to follow-up, (F (1, 57) = 21.171, P ηP2= 0.426), but not a significant interaction between time and sex (F (1, 57) = 0.279, P ηP2= 0.002). Conclusions: The results of this study support the hypothesis that OMT has a continued benefit in pain reduction and functional improvement beyond the initial treatment period. The rural, safety-net hospital setting made this study unique relative to the sample population.展开更多
Cataract surgery is still the most common surgery performed worldwide.It has evolved tremendously in terms of incision,from 12 mm to 1.8 mm,in terms of capsulotomy from envelope type to automated capsulorhexis,and fro...Cataract surgery is still the most common surgery performed worldwide.It has evolved tremendously in terms of incision,from 12 mm to 1.8 mm,in terms of capsulotomy from envelope type to automated capsulorhexis,and from rigid intraocular lens to foldable intraocular lenses.Manual small incision cataract surgery(MSICS)remains a valuable technique,particularly in rural and underserved areas,due to its cost-effectiveness and simplicity.Its low logistics and favorable outcomes are particularly useful for managing the cataract backlog in developing countries.This review highlights the history and evolution of MSICS,and the reasons for the advent and popularity of this technique,especially in developing countries.It reviews the various recent modifications of the technique,for example,from a superior incision approach to temporal incision to customized MSICS,2 mm MSICS,and astigmatism-correcting MSICS.It provides an overview of its applicability in complicated scenarios(viz.,small pupil,compromised cornea,pseudoexfoliation,subluxated cataract,etc.).It briefly reviews the clinical trials on MSICS and its comparison with phacoemulsification.Finally,the review emphasizes why every ophthalmic surgeon must know MSICS,its relevance in postgraduate teaching,and the role of MSICS simulators for the same.Overall,the review presents a comprehensive picture of the present status of this technique in the surgical armamentarium of ophthalmology.展开更多
[Objectives]This meta-analysis evaluated the efficacy of Traditional Chinese Medicine(TCM)manual therapies(Tuina,Daoyin,acupotomology)for idiopathic scoliosis(IS),with dual focus on radiographic outcomes(Cobb angle,ve...[Objectives]This meta-analysis evaluated the efficacy of Traditional Chinese Medicine(TCM)manual therapies(Tuina,Daoyin,acupotomology)for idiopathic scoliosis(IS),with dual focus on radiographic outcomes(Cobb angle,vertebral rotation)and patient-centered metrics(pain,disability,quality of life).[Methods]This study systematically searched PubMed,Cochrane Library,EMBASE,Web of Science,CNKI,Wanfang,and VIP databases(from inception to July 2025)for randomized controlled trials(RCTs)comparing TCM manual therapies against controls(bracing,exercise,sham,or no intervention).Two reviewers independently extracted data and assessed methodological quality using the PEDro scale.Meta-analyses employed random-effects models(Stata 18)to calculate Hedges'g with 95%confidence intervals(CI).Heterogeneity was quantified via I 2 statistics,and subgroup analyses examined intervention types(standalone versus combined)and control groups.[Results]Radiographic outcomes:TCM therapies significantly reduced Cobb angle(Hedges'g=-0.93;95%CI:-1.37,-0.49;p<0.001)and vertebral torsion rotation(VTR;g=-0.71;95%CI:-0.91,-0.51;p<0.001)versus controls;patient-centered outcomes:substantial pain reduction(VAS:g=-1.47;95%CI:-2.64,-0.30;p=0.01)and disability improvement(ODI:g=-1.10;95%CI:-1.57,-0.64;p<0.001)were observed.Quality of life(SRS-22)showed non-significant gains(g=2.01;95%CI:-0.43,4.45;p=0.11).[Conclusions]TCM manual therapies significantly improve spinal alignment and reduce pain/disability in IS patients,particularly when integrated with exercise regimens.While results support their role as complementary interventions,standardization of protocols and long-term efficacy studies are needed for clinical implementation.展开更多
OBJECTIVE To evaluate the safety and effectiveness of robot-assisted percutaneous coronary intervention(R-PCI)compared to traditional manual percutaneous coronary intervention(M-PCI).METHODS This prospective,multicent...OBJECTIVE To evaluate the safety and effectiveness of robot-assisted percutaneous coronary intervention(R-PCI)compared to traditional manual percutaneous coronary intervention(M-PCI).METHODS This prospective,multicenter,randomized controlled,non-inferior clinical trial enrolled patients with coronary heart disease who met the inclusion criteria and had indications for elective percutaneous coronary intervention.Participants were randomly assigned to either the R-PCI group or the M-PCI group.Primary endpoints were clinical and technical success rates.Clinical success was defined as visually estimated residual post-percutaneous coronary intervention stenosis<30% with no 30-day major adverse cardiac events.Technical success in the R-PCI group was defined as successful completion of percutaneous coronary intervention using the ETcath200 robot-assisted system,without conversion to M-PCI in the event of a guidewire or balloon/stent catheter that was unable to cross the vessel or was poorly supported by the catheter.Secondary endpoints included total procedure time,percutaneous coronary intervention procedure time,fluoroscopy time,contrast volume,operator radiation exposure,air kerma,and dose-area product.RESULTS The trial enrolled 152 patients(R-PCI:73 patients,M-PCI:79 patients).Lesions were predominantly B2/C type(73.6%).Both groups achieved 100% clinical success rate.No major adverse cardiac events occurred during the 30-day follow-up.The R-PCI group had a technical success rate of 100%.The R-PCI group had longer total procedure and fluoroscopy times,but lower operator radiation exposure.The percutaneous coronary intervention procedure time,contrast volume,air kerma,and dose-area product were similar between the two groups.CONCLUSIONS For certain complex lesions,performing percutaneous coronary intervention using the ETcath200 robot-assisted system is safe and effective and does not result in conversion to M-PCI.展开更多
Comparing and analyzing the difference between automatic-observed and manual-observed wind speed based on the wind speed parallel observations in two methods, we find that many elements can influence the difference be...Comparing and analyzing the difference between automatic-observed and manual-observed wind speed based on the wind speed parallel observations in two methods, we find that many elements can influence the difference between automatic-observed and manual-observed wind speed, including the levels of speed wind, observation instruments and different regions. According to these elements, correction has been conducted, and find that the correction according to the level of wind speed has the best correction effect.展开更多
基金supported in part by the National Key Research and Development Program of China(2021YFB2900501)in part by the Shaanxi Science and Technology Innovation Team(2023-CX-TD-03)+3 种基金in part by the Science and Technology Program of Shaanxi Province(2021GXLH-Z-038)in part by the Natural Science Foundation of Hunan Province(2023JJ40607 and 2023JJ50045)in part by the Scientific Research Foundation of Hunan Provincial Education Department(23B0713 and 24B0603)in part by the National Natural Science Foundation of China(62401371,62101275,and 62372070).
文摘(Quasi-)closed-form results for the statistical properties of unmanned aerial vehicle(UAV)airto-ground channels are derived for the first time using a novel spatial-vector-based method from a threedimensional(3-D)arbitrary-elevation one-cylinder model.The derived results include a closed-form expression for the space-time correlation function and some quasi-closed-form ones for the space-Doppler power spectrum density,the level crossing rate,and the average fading duration,which are shown to be the generalizations of those previously obtained from the two-dimensional(2-D)one-ring model and the 3-D low-elevation one-cylinder model for terrestrial mobile-to-mobile channels.The close agreements between the theoretical results and the simulations as well as the measurements validate the utility of the derived channel statistics.Based on the derived expressions,the impacts of some parameters on the channel characteristics are investigated in an effective,efficient,and explicable way,which leads to a general guideline on the manual parameter estimation from the measurement description.
文摘S The methane emission flux from rice paddies was simultaneously measured with automatic and manual methods in the suburban of Suzhou. Both methods were based on the static chamber/GC-FID techniques. Detail analysis of the experimental results indicates: a) The data of methane emission measured with the automatic method is reliable. b) About 11 or 19 o′clock of local time is recommended as the optimum sampling time for the manual spot measurement of methane emission from rice paddies. The methane emission fluxes measured by manual sampling at local time other than the optimum time have to be corrected. The correction coefficient may be determined by automatic and continuous measurement. c) In order to get a more accurate result, an empirical correction factor, such as 18%, is recommended to correct the seasonally total amount of measured methane emission by enlarging the automatically measured data or reducing the manually measured ones.
文摘Background: Recent obstetrical practice tends to avoid the use of manual uterine fundal pressure (MUFP);however, data showed that MUFP is actually employed. We here attempted 1) to determine the obstetricians’ attitudes towards MUFP via questionnaire, and 2) to examine whether MUFP shortens the 2nd stage of labor, with the latter tested as a pilot study. Methods: A questionnaire-based study was carried out (n = 122) at meetings of Obstetrics on May 5, 2017. Then, we conducted a pilot case-control study from August 23 to September 6, 2020. Participants (n = 29) were divided into two groups;women who did and did not want MUFP;i.e., MUFP (n = 14) vs. (Non-MUFP) group (n = 15). Results: Of 122 doctors, 99.18% (121/122) used MUFP at cesarean section. 95.90% (117/122) of institutions used MUFP in spontaneous delivery. 95.08% (116/122) obstetricians considered MUFP effective and helpful. 85.24% (104/122) considered that MUFP should be employed after station +3. In the case control study, MUFP vs. Non-MUFP group showed the second-stage-duration of 58.5 (50.25 - 71.25) vs. 48 (39 - 59) minutes, without statistical significance (P = 0.101). However, importantly, MUFP, compared with Non-MUFP group, showed a significantly shorter duration from head visible on introitus (apparition) to delivery;i.e., 21.26 ± 7.32 vs. 30.13 ± 10.61 minutes (P = 0.014). Conclusions: MUFP is still used widely and MUFP shortened the duration of head apparition to delivery time. Larger-sample studies are needed to confirm the efficacy and safety of MUFP.
基金Supported by the National High Technology Engineering Program(302011)
文摘Taking a heavy-duty truck as a research platform,the changing characteristics of shifting force,shift time,and slipping work are obtained through theoretical analysis and manual shift test of a real vehicle. Based on the analysis of the test results,a gear-shifting control strategy of the hydraulic automated shift control system is designed and experimentally verified on the bench. By optimizing the control parameters of high-speed switching valves,a control strategy and parameters are obtained,which can meet the requirements of dynamic performance and reliability.
文摘Of all the methods available for the management of first trimester miscarriages, manual vacuum aspiration is the safest, cheapest and fastest. However, pain caused by manipulation of cervix and uterine suction makes it uncomfortable. We compared the clinical effectiveness and adverse effects of combination of non-selective COX inhibitor (Diclofenac Sodium 50 mg) and opioid (Pentazocine 60 mg) to commonly used opiod only (Pentazocine 60 mg) in daily practice of pain management for the treatment of incomplete abortion with manual vacuum aspiration. This was a randomized double-blind controlled trial conducted in Gynaecological Emergency clinic of Aminu Kano Teaching Hospital Kano, Nigeria. Comparison of the level of pain experienced during the procedure revealed statistically significant difference in the level of pain reported among the groups (P-value 0.03). Comparison of severity of pain perception and patients’ satisfaction was found to be negatively related (P < 0.000001). The present study shows that the use of combined analgesia compared to single agent analgesia during MVA is more, safe, significantly reduced pain and improved patient satisfaction during the procedure.
文摘Objective: The fundal pressure exerted by the assistant to deliver fetal head is often painful to the patient. This study assesses the use of double blade forceps in delivery of fetal head at time of elective Cesarean Section (CS). Methods: A prospective single-blinded randomized controlled trial was conducted among 150 women with repeat elective CS at Ain Shams university hospital, Air Force Specialized hospital and October 6th university hospital. Women were classified into 3 groups (each 50 women). Forceps group: A double blade of forceps was used without fundal pressure. Single blade group: single blade of forceps was used assisted by fundal pressure. Manual group: manual extraction was used assisted by fundal pressure. The outcome of study were;Pain expectation score , pain score during delivery of head, unintended uterine extension, uterine vessels injury and need for additional stitches. The collected data were statistically analyzed using SPSS version 20. Results: High Statistically significant difference in pain score during delivery of head in favor of forceps group (P = 0.001). No differences were found among 3 groups as regarding pain expectation, uterine extension, uterine vessel injury and in need of haemostatic stitches (P > 0.05). Conclusion: Use of double blade forceps is less painful for the patients during delivery of head in CS.
文摘Background: Osteopathic manual treatment (OMT) has been reported to have positive initial results for subjects with chronic non-specific back pain in a rural safety-net hospital. However, the effects of OMT following initial treatment have not been reported. Objective: To determine the effects of OMT for patients with chronic non-specific back pain in a rural safety-net hospital setting for an initial post-clinical and follow-up visit. Methods: A longitudinal, rolling admission, eleven-year study of cohort study with a primary complaint of chronic, non-specific back pain that had plateaued in improvement for a minimum of six months. One hundred and fifty-one subjects completed the first two study visits necessary for data collection, and fifty-nine subjects completed the follow-up visit after six months. Results: A two-way, mixed model, repeated measures ANOVA with pre- post1 and post2 (follow-up) treatment as the within variable and sex as the between subject variable showed a significant main effect from pre- to follow-up, (F (1, 57) = 21.171, P ηP2= 0.426), but not a significant interaction between time and sex (F (1, 57) = 0.279, P ηP2= 0.002). Conclusions: The results of this study support the hypothesis that OMT has a continued benefit in pain reduction and functional improvement beyond the initial treatment period. The rural, safety-net hospital setting made this study unique relative to the sample population.
文摘Cataract surgery is still the most common surgery performed worldwide.It has evolved tremendously in terms of incision,from 12 mm to 1.8 mm,in terms of capsulotomy from envelope type to automated capsulorhexis,and from rigid intraocular lens to foldable intraocular lenses.Manual small incision cataract surgery(MSICS)remains a valuable technique,particularly in rural and underserved areas,due to its cost-effectiveness and simplicity.Its low logistics and favorable outcomes are particularly useful for managing the cataract backlog in developing countries.This review highlights the history and evolution of MSICS,and the reasons for the advent and popularity of this technique,especially in developing countries.It reviews the various recent modifications of the technique,for example,from a superior incision approach to temporal incision to customized MSICS,2 mm MSICS,and astigmatism-correcting MSICS.It provides an overview of its applicability in complicated scenarios(viz.,small pupil,compromised cornea,pseudoexfoliation,subluxated cataract,etc.).It briefly reviews the clinical trials on MSICS and its comparison with phacoemulsification.Finally,the review emphasizes why every ophthalmic surgeon must know MSICS,its relevance in postgraduate teaching,and the role of MSICS simulators for the same.Overall,the review presents a comprehensive picture of the present status of this technique in the surgical armamentarium of ophthalmology.
文摘[Objectives]This meta-analysis evaluated the efficacy of Traditional Chinese Medicine(TCM)manual therapies(Tuina,Daoyin,acupotomology)for idiopathic scoliosis(IS),with dual focus on radiographic outcomes(Cobb angle,vertebral rotation)and patient-centered metrics(pain,disability,quality of life).[Methods]This study systematically searched PubMed,Cochrane Library,EMBASE,Web of Science,CNKI,Wanfang,and VIP databases(from inception to July 2025)for randomized controlled trials(RCTs)comparing TCM manual therapies against controls(bracing,exercise,sham,or no intervention).Two reviewers independently extracted data and assessed methodological quality using the PEDro scale.Meta-analyses employed random-effects models(Stata 18)to calculate Hedges'g with 95%confidence intervals(CI).Heterogeneity was quantified via I 2 statistics,and subgroup analyses examined intervention types(standalone versus combined)and control groups.[Results]Radiographic outcomes:TCM therapies significantly reduced Cobb angle(Hedges'g=-0.93;95%CI:-1.37,-0.49;p<0.001)and vertebral torsion rotation(VTR;g=-0.71;95%CI:-0.91,-0.51;p<0.001)versus controls;patient-centered outcomes:substantial pain reduction(VAS:g=-1.47;95%CI:-2.64,-0.30;p=0.01)and disability improvement(ODI:g=-1.10;95%CI:-1.57,-0.64;p<0.001)were observed.Quality of life(SRS-22)showed non-significant gains(g=2.01;95%CI:-0.43,4.45;p=0.11).[Conclusions]TCM manual therapies significantly improve spinal alignment and reduce pain/disability in IS patients,particularly when integrated with exercise regimens.While results support their role as complementary interventions,standardization of protocols and long-term efficacy studies are needed for clinical implementation.
基金supported by the National Key Research and Development Program of China(No.2022YFC3602500)Beijing High-level Public Health Technical Talents Construction Project(Discipline Leader-03-24)Beijing Hospitals Authority’s Ascent Plan(DFL20240601).
文摘OBJECTIVE To evaluate the safety and effectiveness of robot-assisted percutaneous coronary intervention(R-PCI)compared to traditional manual percutaneous coronary intervention(M-PCI).METHODS This prospective,multicenter,randomized controlled,non-inferior clinical trial enrolled patients with coronary heart disease who met the inclusion criteria and had indications for elective percutaneous coronary intervention.Participants were randomly assigned to either the R-PCI group or the M-PCI group.Primary endpoints were clinical and technical success rates.Clinical success was defined as visually estimated residual post-percutaneous coronary intervention stenosis<30% with no 30-day major adverse cardiac events.Technical success in the R-PCI group was defined as successful completion of percutaneous coronary intervention using the ETcath200 robot-assisted system,without conversion to M-PCI in the event of a guidewire or balloon/stent catheter that was unable to cross the vessel or was poorly supported by the catheter.Secondary endpoints included total procedure time,percutaneous coronary intervention procedure time,fluoroscopy time,contrast volume,operator radiation exposure,air kerma,and dose-area product.RESULTS The trial enrolled 152 patients(R-PCI:73 patients,M-PCI:79 patients).Lesions were predominantly B2/C type(73.6%).Both groups achieved 100% clinical success rate.No major adverse cardiac events occurred during the 30-day follow-up.The R-PCI group had a technical success rate of 100%.The R-PCI group had longer total procedure and fluoroscopy times,but lower operator radiation exposure.The percutaneous coronary intervention procedure time,contrast volume,air kerma,and dose-area product were similar between the two groups.CONCLUSIONS For certain complex lesions,performing percutaneous coronary intervention using the ETcath200 robot-assisted system is safe and effective and does not result in conversion to M-PCI.
基金Supported by Meteorological Data Sharing Center Project (2005DKA31700-01,GX07-01-01)2009 Specific Research in Non-profit Sector (200906041-053)
文摘Comparing and analyzing the difference between automatic-observed and manual-observed wind speed based on the wind speed parallel observations in two methods, we find that many elements can influence the difference between automatic-observed and manual-observed wind speed, including the levels of speed wind, observation instruments and different regions. According to these elements, correction has been conducted, and find that the correction according to the level of wind speed has the best correction effect.
