Background: The success rate of vaginal birth after cesarean section with a single cesarean scar is greater than 50%, the lack of the information about the safety of vaginal birth after cesarean delivery pushes most o...Background: The success rate of vaginal birth after cesarean section with a single cesarean scar is greater than 50%, the lack of the information about the safety of vaginal birth after cesarean delivery pushes most of obstetricians to increase the num ber of cesarean sections following a previous cesarean section. Guidelines for Vaginal birth after cesarean (VBAC) indicate that TOLAC offers women with no contraindications and one previous transverse low-segment cesarean. The objective of the current study was to study the outcome of trial of labour after caesarean section (TOLAC), the indications for emergency repeat cesarean section and to determine the maternal and fetal prognosis in vaginal birth after caesarian section (VBAC) at Tshikaji Mission Hospital. Patients, Material and Methods: This is a retrospective study of the records of 126 women were selected to undergo the TOLAC in the department of gynecology and obstetrics at the Tshikaji Mission Hospital over the period from January 1<sup>st</sup> to December 31<sup>st</sup>, 2021. The data on demography, antenatal care, labour and delivery and outcomes were collected from the maternity unit of this hospital. The data were analyzed using SPSS version 2.0. Results: The TOLAC in 126 studied women. The course of work allowed vaginal delivery 107 parturient women, a success rate of successful VBAC of 85% after the TOLAC. The repeat emergency cesarean section was necessary for delivery in 15% of cases for failed TOLAC. There was no maternal mortality, but we recorded one fetal death or 0.8% of perinatal mortality, 2 cases of cicatricial dehiscence, the incidence of 1.6%. Maternal morbidity after delivery on cicatricial uterus was dominated by postpartum hemorrhages, with 19 cases or 15.1% of cases. Cervical dilatation of more than 3 cm at the time of admission, the parity more than 3 and were the significant factors in favor of a successful VBAC. Birth weight of more than 3500 g, fetal distress and malpresentation were associated with a lower success rate of VBAC. The TOLAC in selected cases has great importance in the present era of the rising rate of primary CS especially in rural areas. Conclusion: Pregnancy on a cicatricial uterus represents a high-risk pregnancy. Trial of VBAC in selected cases has great importance in the present era of the rising rate of primary CS especially in rural areas. There is a significantly high vaginal birth after caesarian section (VBAC) success rate among selected women undergoing trial of scar in Tshikaji Hospital. TOLAC remains the option for childbirth in low resource settings as Kasai region in DRC. Adequate patient education and counselling in addition to appropriate patient selection for TOLAC remain the cornerstone to achieving high VBAC success rate.展开更多
Background：In the mainland of China, the trial of labor after cesarean section is still a relatively new technique. In this study, we aimed to investigate the effects of labor onset, oxytocin use, and epidural anesth...Background：In the mainland of China, the trial of labor after cesarean section is still a relatively new technique. In this study, we aimed to investigate the effects of labor onset, oxytocin use, and epidural anesthesia on maternal and neonatal outcomes for vaginal birth after cesarean section （VBAC） in a tertiary hospital in China.Methods：This was a retrospective study carried out on 212 VBAC cases between January 2015 and June 2017 in Beijing Obstetrics and Gynecology Hospital, Capital Medical University. Relevant data were acquired on a form, including maternal age, gravidity and parity, body mass index before pregnancy, weight gain during pregnancy, type of labor onset, gestational age, the use of oxytocin and epidural anesthesia, birth mode, the duration of labor, and neonatal weight. The factors affecting maternal and neonatal outcomes for cases involving VBAC, especially with regards to postpartum hemorrhage （PPH） and fetal distress, were evaluated by univariate analysis and multivariable logistic regression.Results：Data showed that 36 women （17.0%） had postpartum hemorrhage （PPH） and 51 cases （24.1%） featured fetal distress. Normal delivery took place for 163 infants （76.9%） while 49 infants （23.1%） underwent operative vaginal deliveries with forceps. There were 178 cases （84.0%） of spontaneous labor and 34 cases （16.0%） required induction. Oxytocin was used in 54 cases （25.5%） to strengthen uterine contraction, and 65 cases （30.7%） received epidural anesthesia. The rate of normal delivery in cases involving PPH was significantly lower than those without PPH （61.1% vs. 80.1%; χ2 = 6.07, P = 0.01）. Multivariate logistic analysis showed that the intrapartum administration of oxytocin （odds ratio [OR] = 2.47; 95% confidence interval [CI] = 1.07–5.74; P = 0.04） and birth mode （OR = 0.40; 95% CI = 0.18–0.87; P = 0.02） was significantly associated with PPH in VBAC cases. Operative vaginal delivery occurred more frequently in the group with fetal distress than the group without （49.0% vs. 14.9%, χ2 = 25.36, P = 0.00）. Multivariate logistic analysis also revealed that the duration of total labor （OR = 1.01; 95% CI = 1.00–1.03; P = 0.04） and the gestational week of delivery （OR = 1.08; 95% CI = 1.05–1.11; P = 0.00） were significantly associated with fetal distress in VBAC.Conclusions：The administration of oxytocin during labor and birth was identified as a protective factor for PPH in VBAC while birth mode was identified as a risk factor. Finally, the duration of total labor and the gestational week of delivery were identified as risk factors for fetal distress in cases of VBAC. This information might help obstetricians provide appropriate interventions during labor and birth for VBAC.展开更多
Background: Trial of labor after cesarean delivery (TOLAC) has long been accepted as a safe option for women with previous cesarean delivery. Previous efforts have been exerted in trials to predict the success rates o...Background: Trial of labor after cesarean delivery (TOLAC) has long been accepted as a safe option for women with previous cesarean delivery. Previous efforts have been exerted in trials to predict the success rates of TOLAC according to specific parameters related to previous cesarean section and before TOLAC. We aimed to investigate the different indications of previous cesarean delivery as independent predictors for successful vaginal birth. Methods: A retrospective study was conducted in Armed Forces Hospitals of the Southern Region between December 15, 2019, and July 1, 2020. The included 566 patients with previous cesarean section who were willing to undergo a trial of labor were divided into two groups according to the success of vaginal birth (VBAC). Results: The nonrecurring indications for previous cesarean delivery were higher in the successful group (fetal distress 54.7% vs 41.1%, malpresentation 26% vs 21.4%, multifetal pregnancy 3.8% vs 2.7%). Additionally, the successful VBAC group had a significantly higher percentage of previous successful VBAC (47.7% vs 21.9%) and prior vaginal deliveries (58.5% vs 44.2%) and less coincidence of medical disorders and meconium-stained liquor (18.1% vs 26.3% and 3.2% vs 8.2%, respectively) than the unsuccessful group. Conclusion: During counseling regarding trial of labor after cesarean section, indications for previous cesarean section not related to arrest of labor can predict higher success of VBAC. Moreover, previous successful vaginal delivery or VBAC improves the success rates.展开更多
目的:分析激励式心理干预联合加速康复外科(enhanced recovery after surgery,ERAS)在选择性剖宫产患者中的应用效果。方法:纳入2022年5—7月在暨南大学附属顺德医院接受基础护理的选择性剖宫产产妇30例作为对照组,2022年8—10月接受ERA...目的:分析激励式心理干预联合加速康复外科(enhanced recovery after surgery,ERAS)在选择性剖宫产患者中的应用效果。方法:纳入2022年5—7月在暨南大学附属顺德医院接受基础护理的选择性剖宫产产妇30例作为对照组,2022年8—10月接受ERAS护理的选择性剖宫产产妇30例作为ERAS组,2022年11月—2023年1月接受激励式心理干预的选择性剖宫产产妇30例作为心理干预组,2023年2—4月接受激励式心理和ERAS联合干预的选择性剖宫产产妇30例作为联合组。对比经护理干预后四组的围手术期临床指标、负性情绪指标、术后疼痛评分和并发症。结果:联合组的肠鸣音恢复时间、排便时间和离床时间及术后泌乳时间均明显早于对照组、ERAS组和心理干预组(P<0.05)。分娩后焦虑自评量表(SAS)和抑郁自评量表(SDS)评分及术后2、12 h的疼痛评分均明显低于对照组、ERAS组和心理干预组(P<0.05)。四组围手术期并发症总发生率对比,差异无统计学意义(P>0.05)。结论:激励式心理干预联合EARS护理选择性剖宫产患者,可减轻术后疼痛,调节负面情绪,促进其早日康复。展开更多
China's universal two child policy was released in October of 2015.How would this new policy influence the rate of overall cesarcan delivery(CD)in China?The objective of this paper is to investigate the trend of o...China's universal two child policy was released in October of 2015.How would this new policy influence the rate of overall cesarcan delivery(CD)in China?The objective of this paper is to investigate the trend of overall CD rate with the increase of number of multiparous women based on a big childbirth center of China(a tertiary hospital)in 2016.In this study,22530 cases from the medical record department of a big childbirth center of China from January 1 to December 31 in 2016 were entolled as research objects.Electronic health records of these selected objects were retrieved.According t0 the history of childbirth,the selected cases were divided into primiparous group containing 16340 cases and multiparous group containing 6190 cases.Chi-square test was carried out to compare the rate of CD,neuraxial labor analgesia,maternity insurance between the two groups;1-test was performed to compare the in-hospital days and gestational age at birth between the two groups.Pearson corrclation coefficient was used to evaluate the rclationship among observed monthly rate of multiparas,overall CD rate,and Elective Repeat Cesarean Delivery(ERCD)rate.The results showed that the CD rate in multiparous group was 55.46%,which was higher than that in primiparous group(34.66%,P<0.05).The rate of neuraxial labor analgesia in multiparas group was 9.29%,which was lower than that in primiparas group(35.94%,P<0.05).However,the rate of maternity insurance was higher in multiparas group(57.00%)than that in primiparas group(41.08%,P<0.05).The hospital cost and in-hospital days in multiparas group were higher,and the gcstational age at birth in multiparas group was lower than in primiparas group(P<0.05).The overall CD rate slightly dropped in the first 4 months of the year(P<0.05),then increased from 36.27%(April)to 43.21%(Dcember)(P<0.05).The rate of multiparas women and ERCD had the same trend(P<0.05).There were linear correlations among the rate of overall CD,the rate of multiparas women and the rate of ERCD rate(P<0.05).With the opening of China's two-child policy,the increasing rate of overall CD is directly related with the high rate of ERCD.Trials of Labor After Cesarean Section(TOLAC)in safe mode to reduce overall CD rate are warranted in the future.展开更多
目的探究不同剂量缩宫素(oxytocin,OT)对剖宫产术后再次妊娠经阴道试产(trial of labor after cesareansection,TOLAC)孕妇产程进展、凝血功能和母婴结局的影响。方法回顾性分析138例TOLAC孕妇临床病历资料,根据产程中OT总用量分为低剂...目的探究不同剂量缩宫素(oxytocin,OT)对剖宫产术后再次妊娠经阴道试产(trial of labor after cesareansection,TOLAC)孕妇产程进展、凝血功能和母婴结局的影响。方法回顾性分析138例TOLAC孕妇临床病历资料,根据产程中OT总用量分为低剂量组61例、中剂量组45例和高剂量组32例,比较三组的产程进展、凝血功能、分娩方式、妊娠结局及围产儿结局。结果三组第一产程、第二产程、第三产程及总产程比较,差异均无统计学意义(P>0.05);与用药前比,三组用药后凝血酶原时间(PT)、活化部分凝血活酶时间(APTT)均降低,纤维蛋白原(FIB)水平均升高,差异有统计学意义(P<0.05),三组间用药后PT、APTT、FIB比较差异无统计学意义(P>0.05)。低剂量组及中剂量组孕产妇的胎盘早剥、新生儿高胆红素血症发生率均低于高剂量组,差异有统计学意义(P<0.05)。结论OT可增强TOLAC孕妇子宫收缩力,改善凝血功能,但大剂量OT可能增加胎盘早剥及新生儿高胆红素血症发生风险。展开更多
目的探讨前次剖宫产手术时机对再孕阴道分娩母婴并发症的影响。方法回顾性分析本院收治的1034例足月剖宫产术后阴道分娩(VBAC)孕产妇资料。按前次剖宫产手术时机分为择期组(择期行剖宫产术)426例、第一产程组(第一产程行剖宫产术)278例...目的探讨前次剖宫产手术时机对再孕阴道分娩母婴并发症的影响。方法回顾性分析本院收治的1034例足月剖宫产术后阴道分娩(VBAC)孕产妇资料。按前次剖宫产手术时机分为择期组(择期行剖宫产术)426例、第一产程组(第一产程行剖宫产术)278例、第二产程组(第二产程行剖宫产术)330例。分析前次剖宫产手术时机对VBAC孕产妇的产程、产后并发症及新生儿出生情况的影响。结果第二产程组子宫收缩乏力比例、产后24 h出血量、产后出血发生率及产后住院天数均大于择期组和第一产程组(P<0.05),而择期组与第一产程组比较,以上指标差异无统计学意义(P>0.05)。3组间第二、第三产程时限、助产率、会阴裂伤率、产后尿潴留率、发热比例及新生儿1 min Apgar评分、新生儿窒息发生率及转入新生儿科比例比较,差异无统计学意义(P>0.05)。结论前次第二产程剖宫产手术孕产妇再孕阴道分娩时发生子宫收缩乏力及产后出血风险增加。展开更多
文摘Background: The success rate of vaginal birth after cesarean section with a single cesarean scar is greater than 50%, the lack of the information about the safety of vaginal birth after cesarean delivery pushes most of obstetricians to increase the num ber of cesarean sections following a previous cesarean section. Guidelines for Vaginal birth after cesarean (VBAC) indicate that TOLAC offers women with no contraindications and one previous transverse low-segment cesarean. The objective of the current study was to study the outcome of trial of labour after caesarean section (TOLAC), the indications for emergency repeat cesarean section and to determine the maternal and fetal prognosis in vaginal birth after caesarian section (VBAC) at Tshikaji Mission Hospital. Patients, Material and Methods: This is a retrospective study of the records of 126 women were selected to undergo the TOLAC in the department of gynecology and obstetrics at the Tshikaji Mission Hospital over the period from January 1<sup>st</sup> to December 31<sup>st</sup>, 2021. The data on demography, antenatal care, labour and delivery and outcomes were collected from the maternity unit of this hospital. The data were analyzed using SPSS version 2.0. Results: The TOLAC in 126 studied women. The course of work allowed vaginal delivery 107 parturient women, a success rate of successful VBAC of 85% after the TOLAC. The repeat emergency cesarean section was necessary for delivery in 15% of cases for failed TOLAC. There was no maternal mortality, but we recorded one fetal death or 0.8% of perinatal mortality, 2 cases of cicatricial dehiscence, the incidence of 1.6%. Maternal morbidity after delivery on cicatricial uterus was dominated by postpartum hemorrhages, with 19 cases or 15.1% of cases. Cervical dilatation of more than 3 cm at the time of admission, the parity more than 3 and were the significant factors in favor of a successful VBAC. Birth weight of more than 3500 g, fetal distress and malpresentation were associated with a lower success rate of VBAC. The TOLAC in selected cases has great importance in the present era of the rising rate of primary CS especially in rural areas. Conclusion: Pregnancy on a cicatricial uterus represents a high-risk pregnancy. Trial of VBAC in selected cases has great importance in the present era of the rising rate of primary CS especially in rural areas. There is a significantly high vaginal birth after caesarian section (VBAC) success rate among selected women undergoing trial of scar in Tshikaji Hospital. TOLAC remains the option for childbirth in low resource settings as Kasai region in DRC. Adequate patient education and counselling in addition to appropriate patient selection for TOLAC remain the cornerstone to achieving high VBAC success rate.
文摘Background：In the mainland of China, the trial of labor after cesarean section is still a relatively new technique. In this study, we aimed to investigate the effects of labor onset, oxytocin use, and epidural anesthesia on maternal and neonatal outcomes for vaginal birth after cesarean section （VBAC） in a tertiary hospital in China.Methods：This was a retrospective study carried out on 212 VBAC cases between January 2015 and June 2017 in Beijing Obstetrics and Gynecology Hospital, Capital Medical University. Relevant data were acquired on a form, including maternal age, gravidity and parity, body mass index before pregnancy, weight gain during pregnancy, type of labor onset, gestational age, the use of oxytocin and epidural anesthesia, birth mode, the duration of labor, and neonatal weight. The factors affecting maternal and neonatal outcomes for cases involving VBAC, especially with regards to postpartum hemorrhage （PPH） and fetal distress, were evaluated by univariate analysis and multivariable logistic regression.Results：Data showed that 36 women （17.0%） had postpartum hemorrhage （PPH） and 51 cases （24.1%） featured fetal distress. Normal delivery took place for 163 infants （76.9%） while 49 infants （23.1%） underwent operative vaginal deliveries with forceps. There were 178 cases （84.0%） of spontaneous labor and 34 cases （16.0%） required induction. Oxytocin was used in 54 cases （25.5%） to strengthen uterine contraction, and 65 cases （30.7%） received epidural anesthesia. The rate of normal delivery in cases involving PPH was significantly lower than those without PPH （61.1% vs. 80.1%; χ2 = 6.07, P = 0.01）. Multivariate logistic analysis showed that the intrapartum administration of oxytocin （odds ratio [OR] = 2.47; 95% confidence interval [CI] = 1.07–5.74; P = 0.04） and birth mode （OR = 0.40; 95% CI = 0.18–0.87; P = 0.02） was significantly associated with PPH in VBAC cases. Operative vaginal delivery occurred more frequently in the group with fetal distress than the group without （49.0% vs. 14.9%, χ2 = 25.36, P = 0.00）. Multivariate logistic analysis also revealed that the duration of total labor （OR = 1.01; 95% CI = 1.00–1.03; P = 0.04） and the gestational week of delivery （OR = 1.08; 95% CI = 1.05–1.11; P = 0.00） were significantly associated with fetal distress in VBAC.Conclusions：The administration of oxytocin during labor and birth was identified as a protective factor for PPH in VBAC while birth mode was identified as a risk factor. Finally, the duration of total labor and the gestational week of delivery were identified as risk factors for fetal distress in cases of VBAC. This information might help obstetricians provide appropriate interventions during labor and birth for VBAC.
文摘Background: Trial of labor after cesarean delivery (TOLAC) has long been accepted as a safe option for women with previous cesarean delivery. Previous efforts have been exerted in trials to predict the success rates of TOLAC according to specific parameters related to previous cesarean section and before TOLAC. We aimed to investigate the different indications of previous cesarean delivery as independent predictors for successful vaginal birth. Methods: A retrospective study was conducted in Armed Forces Hospitals of the Southern Region between December 15, 2019, and July 1, 2020. The included 566 patients with previous cesarean section who were willing to undergo a trial of labor were divided into two groups according to the success of vaginal birth (VBAC). Results: The nonrecurring indications for previous cesarean delivery were higher in the successful group (fetal distress 54.7% vs 41.1%, malpresentation 26% vs 21.4%, multifetal pregnancy 3.8% vs 2.7%). Additionally, the successful VBAC group had a significantly higher percentage of previous successful VBAC (47.7% vs 21.9%) and prior vaginal deliveries (58.5% vs 44.2%) and less coincidence of medical disorders and meconium-stained liquor (18.1% vs 26.3% and 3.2% vs 8.2%, respectively) than the unsuccessful group. Conclusion: During counseling regarding trial of labor after cesarean section, indications for previous cesarean section not related to arrest of labor can predict higher success of VBAC. Moreover, previous successful vaginal delivery or VBAC improves the success rates.
文摘目的:分析激励式心理干预联合加速康复外科(enhanced recovery after surgery,ERAS)在选择性剖宫产患者中的应用效果。方法:纳入2022年5—7月在暨南大学附属顺德医院接受基础护理的选择性剖宫产产妇30例作为对照组,2022年8—10月接受ERAS护理的选择性剖宫产产妇30例作为ERAS组,2022年11月—2023年1月接受激励式心理干预的选择性剖宫产产妇30例作为心理干预组,2023年2—4月接受激励式心理和ERAS联合干预的选择性剖宫产产妇30例作为联合组。对比经护理干预后四组的围手术期临床指标、负性情绪指标、术后疼痛评分和并发症。结果:联合组的肠鸣音恢复时间、排便时间和离床时间及术后泌乳时间均明显早于对照组、ERAS组和心理干预组(P<0.05)。分娩后焦虑自评量表(SAS)和抑郁自评量表(SDS)评分及术后2、12 h的疼痛评分均明显低于对照组、ERAS组和心理干预组(P<0.05)。四组围手术期并发症总发生率对比,差异无统计学意义(P>0.05)。结论:激励式心理干预联合EARS护理选择性剖宫产患者,可减轻术后疼痛,调节负面情绪,促进其早日康复。
基金This study was supported by the Health and Farmily Planning Commission of Hubei Province(No.WJ2018H0133).
文摘China's universal two child policy was released in October of 2015.How would this new policy influence the rate of overall cesarcan delivery(CD)in China?The objective of this paper is to investigate the trend of overall CD rate with the increase of number of multiparous women based on a big childbirth center of China(a tertiary hospital)in 2016.In this study,22530 cases from the medical record department of a big childbirth center of China from January 1 to December 31 in 2016 were entolled as research objects.Electronic health records of these selected objects were retrieved.According t0 the history of childbirth,the selected cases were divided into primiparous group containing 16340 cases and multiparous group containing 6190 cases.Chi-square test was carried out to compare the rate of CD,neuraxial labor analgesia,maternity insurance between the two groups;1-test was performed to compare the in-hospital days and gestational age at birth between the two groups.Pearson corrclation coefficient was used to evaluate the rclationship among observed monthly rate of multiparas,overall CD rate,and Elective Repeat Cesarean Delivery(ERCD)rate.The results showed that the CD rate in multiparous group was 55.46%,which was higher than that in primiparous group(34.66%,P<0.05).The rate of neuraxial labor analgesia in multiparas group was 9.29%,which was lower than that in primiparas group(35.94%,P<0.05).However,the rate of maternity insurance was higher in multiparas group(57.00%)than that in primiparas group(41.08%,P<0.05).The hospital cost and in-hospital days in multiparas group were higher,and the gcstational age at birth in multiparas group was lower than in primiparas group(P<0.05).The overall CD rate slightly dropped in the first 4 months of the year(P<0.05),then increased from 36.27%(April)to 43.21%(Dcember)(P<0.05).The rate of multiparas women and ERCD had the same trend(P<0.05).There were linear correlations among the rate of overall CD,the rate of multiparas women and the rate of ERCD rate(P<0.05).With the opening of China's two-child policy,the increasing rate of overall CD is directly related with the high rate of ERCD.Trials of Labor After Cesarean Section(TOLAC)in safe mode to reduce overall CD rate are warranted in the future.
文摘目的探究不同剂量缩宫素(oxytocin,OT)对剖宫产术后再次妊娠经阴道试产(trial of labor after cesareansection,TOLAC)孕妇产程进展、凝血功能和母婴结局的影响。方法回顾性分析138例TOLAC孕妇临床病历资料,根据产程中OT总用量分为低剂量组61例、中剂量组45例和高剂量组32例,比较三组的产程进展、凝血功能、分娩方式、妊娠结局及围产儿结局。结果三组第一产程、第二产程、第三产程及总产程比较,差异均无统计学意义(P>0.05);与用药前比,三组用药后凝血酶原时间(PT)、活化部分凝血活酶时间(APTT)均降低,纤维蛋白原(FIB)水平均升高,差异有统计学意义(P<0.05),三组间用药后PT、APTT、FIB比较差异无统计学意义(P>0.05)。低剂量组及中剂量组孕产妇的胎盘早剥、新生儿高胆红素血症发生率均低于高剂量组,差异有统计学意义(P<0.05)。结论OT可增强TOLAC孕妇子宫收缩力,改善凝血功能,但大剂量OT可能增加胎盘早剥及新生儿高胆红素血症发生风险。
文摘目的探讨前次剖宫产手术时机对再孕阴道分娩母婴并发症的影响。方法回顾性分析本院收治的1034例足月剖宫产术后阴道分娩(VBAC)孕产妇资料。按前次剖宫产手术时机分为择期组(择期行剖宫产术)426例、第一产程组(第一产程行剖宫产术)278例、第二产程组(第二产程行剖宫产术)330例。分析前次剖宫产手术时机对VBAC孕产妇的产程、产后并发症及新生儿出生情况的影响。结果第二产程组子宫收缩乏力比例、产后24 h出血量、产后出血发生率及产后住院天数均大于择期组和第一产程组(P<0.05),而择期组与第一产程组比较,以上指标差异无统计学意义(P>0.05)。3组间第二、第三产程时限、助产率、会阴裂伤率、产后尿潴留率、发热比例及新生儿1 min Apgar评分、新生儿窒息发生率及转入新生儿科比例比较,差异无统计学意义(P>0.05)。结论前次第二产程剖宫产手术孕产妇再孕阴道分娩时发生子宫收缩乏力及产后出血风险增加。
