Effect of emotion management and nursing on patients with painless induced abortion after operation

BACKGROUND With an estimated 121 million abortions following unwanted pregnancies occurring worldwide each year,many countries are now committed to protecting women’s reproductive rights.AIM To analyze the impact of emotional management and care on anxiety and contraceptive knowledge mastery in painless induced abortion(IA)patients.METHODS This study was retrospective analysis of 84 patients with IA at our hospital.According to different nursing methods,the patients were divided into a control group and an observation group,with 42 cases in each group.Degree of pain,rate of postoperative uterine relaxation,surgical bleeding volume,and postoperative bleeding volume at 1 h between the two groups of patients;nursing satisfaction;and mastery of contraceptive knowledge were analyzed.RESULTS After nursing,Self-Assessment Scale,Depression Self-Assessment Scale,and Hamilton Anxiety Scale scores were 39.18±2.18,30.27±2.64,6.69±2.15,respectively,vs 45.63±2.66,38.61±2.17,13.45±2.12,respectively,with the observation group being lower than the control group(P<0.05).Comparing visual analog scales,the observation group was lower than the control group(4.55±0.22 vs 3.23±0.41;P<0.05).The relaxation rate of the cervix after nursing,surgical bleeding volume,and 1-h postoperative bleeding volumes were 25(59.5),31.72±2.23,and 22.41±1.23,respectively,vs 36(85.7),42.39±3.53,28.51±3.34,respec tively,for the observation group compared to the control group.The observation group had a better nursing situation(P<0.05),and higher nursing satisfaction and contraceptive knowledge mastery scores compared to the control group(P<0.05).CONCLUSION The application of emotional management in postoperative care of IA has an ideal effect.

Prevalence of Induced Abortion among Female Students in Selected Tertiary Learning Institutions in Gaborone City, Botswana

Induced abortion signifies that pregnancy has been tempered with. Abortion is the removal of an embryo or fetus weighing less than 500 grams from its mother. It can either be spontaneous (unprompted) or induced. Abortion remains one of the leading causes of maternal deaths in developing countries with induced abortion being the key cause. In 2014 from January to August, 9 abortion related deaths occurred in Botswana. There are several reasons female students in tertiary institutions resort to seeking induced abortion which include the socio-demographics like age and socio-economic factors like financial instability. Parental fears, unintended pregnancy and pressure from the partner also force females to terminate pregnancy. Induced abortion has claimed many women’s lives especially in developing countries with very restrictive abortion laws like Botswana as women do not access safe abortion care services. The study intends to establish the determinants of induced abortion among female students in selected tertiary learning institutions in Gaborone City, Botswana. It concentrated primarily on determining the prevalence of induced abortion. This was a descriptive cross-sectional study using both quantitative and qualitative data collection techniques. Systematic random sampling technique was used to come up with 278 participants. Prior to commencement of data collection, all ethical and logistical prerequisites were satisfied. Informed consent was solicited from all the study participants and the purpose of the study was fully explained. A self-administered questionnaire was used to collect data. Microsoft Excel spread sheet was used to code, clean, and enter the data, which was then exported for analysis to the statistical package for social sciences version 24. Frequency distribution tables, percentages graphs, and pie charts were used to illustrate the descriptive information. The study revealed that prevalence of induced abortion among female students in Gaborone City is 7.9%. They even suggested that induced abortion be liberalized. Age was the only socio-demographic factor associated with induced abortion with p = 0.047 using Chi Square test χ2 = 7.609, df = 3. The study findings concluded that female students resort to induced abortion as a result of pressure from both parents and male partners especially when the pregnancy is unintended. The study recommends that the abortion law in Botswana be made liberal to ease access to safe abortion care services. It also recommends that contraceptive commodities should consistently be available in public health facilities.

Clinical Observation of Misoprostol before and after Painless Induced Abortion

Background: Though painless abortion is a safe, effective and excellent method of artificial abortion, intravenous anesthesia cannot effectively expand the cervix. Hard and tight cervix often affects the operation and easily inducesabortion complications. Misoprostol can induce uterine contraction and soften the cervix. Objective: To investigate the clinical effect of misoprostol on abortion before and after painless induced abortion. Methods: 600 case pregnant women were divided into three groups: A, B and C, 200 case in each group. All patients were anesthetized. In group A, misoprostol 0.2 ug was placed in the posterior fornix of vagina 2 hours before the operation of induced abortion;in group B, misoprostol 0.2 ug was not only placed in the posterior fornix of vagina 2 hours before the operation of induced abortion but also taken orally 2 hours and 6 hours after the operation;in group C, misoprostol was not used before and after the operation. The operation time, intraoperative bleeding volume, postoperative bleeding, the percentage of cervical relaxation and the rate of incomplete abortion among the three groups were compared. Results: Compared with group A and group B, the operation time of group C was longer and the amount of bleeding was more (P < 0.05), but there was no significant difference between group A and group B (P > 0.05). The duration of bleeding in group B was less than that in group A (P < 0.05). The percentage of cervical relaxation in group A and B was higher than that in group C (P < 0.05). The rate of incomplete abortion in group B < group A < group C (P < 0.05), and there was no residual uterine cavity in group B. Conclusion: The use of misoprostol before and after painless induced abortion can not only shorten the time of operation, reduce intraoperative and postoperative vaginal bleeding, but also has not incurred incomplete abortion(primary outcome).

Improving Sexual and Contraceptive Behaviours of Unmarried Female Youth with First Trimester Induced Abortion in Sichuan,China

Objectives To understand the changes on sexual and contraceptive behaviours of unmarried induced abortion（IA） youth by intervention in Sichuan, China; and to find a way to improve sexual and contraceptive behaviours of unmarried IA youth. Methods Intervention epidemiological surveys （baseline and evaluation） plus qualitative interview were used. During July 2002 and July 2003, 2 484 unmarried female volunteers who aged 15-29 years and come to clinics seeking abortion were recruited by cluster random sampling from the four selected regions of Sichuan, 48 volunteers were interviewed for 8 focusgroup discussions （FGDs） and 16 in-depth interviews equally for each survey. Information, education anol communication（IEC） materials, education sessions, trainings and counseling were given to subjects and service providers during the project implementation. Questionnaires for surveys and guidelines for qualitative interviews were used. Results Comparison of the after with the before intervention. 1） the proportion of respondents having knowledge about sexuality was increased by 13%. Among them, the proportion of respondents got part and most of the knowledge was increased by 43%. Maximum number of sex partners the respondents have decreased from 9 to 4. Respondents＇partnerships have gradually changed from more acquaintances/school mates/boyfriends to fianés mainly; 2） respondents＇ contraceptive use rate was increased by 20%. Among them, the condom use rate increased rapidly to 80%. Purposes of condom use were changed from only for contraception to for prevention of HIV/AIDS/STDs and pregnancy. And most of respondents stabilised their method use - condoms. Most of respondents suggested condoms was the method most suitable for unmarried IA youth, this proportion was increased by 44%; 3） proportion of respondents knowing more about consequences of induced abortion was increased by 24%; and 4） proportions of respondents having depression and anxiety symptoms were decreased by 66% and by 61%, respectively. Conclusion The intervention including IEC materials, education, training and counseling was effective in improving sexual and contraceptive behaviours of unmarried IA youth.

Comparison of Depression and Anxiety between Unmarried Female Youth in Two Groups of Induced Abortion and None-Induced Abortion in Yibin City of China

Objectives To explore the risk factors influencing the mental status of unmarried female youth. Methods ,4 cross-sectional survey and a qualitative interview were adopted. 1200 unmarried female volunteers （600 with 1,4） who aged 15-29 years in Yibin city were investigated, and 8 focus group discussions （FGDs） and 8 in-depth interviews were conducted. Except the investigation of subject＇s personal information, econ-socio status, sexual behavior, contraception and reproductive health problems they face, two selfreporting scales, CES-D and SAS were used for assessment of depression and anxiety of the subjects. Results 1） Depression and anxiety among unmarried female youth investigated in current study are relatively common. Proportions of the females with depression and anxiety to the total sample are 27.4% and 33.4%, respectively; 2） Depression and anxiety of the females with 1,4 are more serious than that of the female without 1,4. Proportions of unmarried females with IA have depression and anxiety to the total unmarried females with 1,4 are 3.45 times and 2.61 times that of unmarried females without 1,4 have depression and anxiety to the total unmarried females without 1,4, respectively; 3） IA is one of the key risk factors influencing depression and anxiety of unmarried female youth. Other risk factors are lack on basic knowledge about sex/ STD/HIV/AIDS, reproductive tract infections, relatively lower income, age at sex debut is relatively younger, etc. In addition, multiple sex partners and repeat pregnancies were risk factors influencing anxiety of unmarried female youth. Conclusion Depession and anxiety was more popular in unmarried females with IA Intervention for improving mental health of unmarried females should be developred Key words：

Characteristics of Induced Abortion in China in the 1990s

Objective To understand the characteristics of induced abortion in China in the 1990s, and to find out the influential factors. Methods The overall number of induced abortions, calculate cohort induced abortion frequency, explore the impact of a child＇s sex and the number of previous children on induced abortions were estimated by using the data from the ＂National Poptdation and Reproductive Health Survey＂ conducted by the National Family Planning Commission in November 1997. Results Induced abortions in China had their own characteristics, which were far different from other countries. The main difference was led by the fact that the country was driven by an implemented family planning program and nationwide population policies. The key cause of induced abortions was due to an inconsistentT with the requirements of the family planning policy. However, as a result of effective and prevalent contraception, the rates of induced abortions were not quite high in the 1990s, when compared with other countries. Even though, in the early 1990s, the government had reinforced the family planning program through administration and legislation, unlike during the early 1980s when the one-child policy was implemented, the induced abortion rate and the number of induce abortions did not increase as the fertility rate substantially decreased. Conclusion This finding implies that the fertility declines in the 1990s were not caused by the number of induced abortions. The transition of the fertility ideology of the people has played an important role in the fertility decline, as institutional reform and socioeconomic development are implemented.

Use of Emergency Contraception could Halve Induced Abortion Ratein Shanghai, China

Objective To investigate and estimate the proportion of the induced abortion that could have been prevented by using emergency contraception in Shanghai Method Structured interviews were conducted in 606 women (413 married and 193 unmarried) aged 18-49 years, who were attending three health care centers in Shang- hai for termination of first trimester pregnancy. Results A total of 98.2% of the pregnancies were unwanted, and 63.7% of the women recognized that they were at risk of pregnancy soon after the intercourse. It is estimated that 52.2% of the induced abortion could have been prevented if the women had used levonorgestrel-only emergency contraception. Only 28.5% of the respondents were aware of emergency contraception. The most important sources of information about emergency contraception identified by respondents were books/newspapers/periodicals (38.2%), and relatives/friends (30.6%). Family planning health education on emergency contraception was noted by 28.9% of married women but only by 5.8% of unmarried women. A portion of 85.5% of all respondents reported they would be willing to use emergency contraception when needed. Those more willing to use emergency con- traception included younger, better educated, and unmarried women experiencing their first pregnancy. Women preferred drugstores (60.1%) than hospitals (30.2%) for obtaining emergency contraception. Conclusion Women’s needs for emergency contraception were enormous. Promotion of emergency contraception by providing information and improving service could have a substantial impact on reducing the rate of induced abortion in Shanghai.

Planned Parenthood: Supply Induced Demand for Abortion in the US

The rate and number of induced abortions in the US has declined steadily for nearly three decades. In contrast to this overall reduction, Planned Parenthood Federation of America abortion providers exhibit a persistent increase in both abortions and their market share percentage of total abortion procedures. For the period 1995-2014, estimated annual and cumulative excess abortions are calculated (Planned Parenthood Abortion Inflation Effect—PPAIE) to indicate the number of abortions which would have been averted if the PP utilization experience had been identical to that of Non-PP abortion providers. PP excess abortions grew steadily each year from 21,000 in 1996 to 258,200 in 2014, 28% of total abortions that year. The cumulative number of abortions added by the PPAIE from 1995-2014 was 3,025,560 or 12.5% of the 24,112,600 performed. Planned Parenthood has had a long-term and accelerating inflationary effect on the incidence and prevalence of abortion in the US.

Voluntary Induced Abortion in Cameroon: Prevalence, Reasons, and Complications

In Cameroon, induced abortion is permitted when a woman’s life is at risk, to preserve her physical and mental health and on the grounds of rape or incest. Objectives: The aim of this study was to determine the prevalence, reasons and complications of voluntary induced abortion among women attending the obstetrics and gynecology services in an urban area, Yaoundé and in a rural area, Wum in Cameroon. Methods: We carried out a cross sectional study, with 509 women recruited between August 1, 2011 and December 31, 2011 in three health facilities in Cameroon. We appreciated the frequency, complications and reasons for Voluntary induced abortions. Results: The prevalence of voluntary induced abortion was 26.3% (134/509) globally;25.6% (65/254) in urban area and 27.1% (69/255) in rural area. One hundred and eleven (83%) cases of induced abortions were carried out in a health structure and 23 (17%) cases in private homes. Medical doctors and nurses were the most frequent abortion providers in both urban (84.7%) as well as rural setting (77.2%). The three main reasons for induced abortion were to pursue their studies (34.3%), not yet married (22.6%) and fear of parents (13.9%). Complications were reported by 20% (27/134) of respondents who had carried out voluntary induced abortion. Excessive bleeding was the most reported complication (70.4%). Conclusion: Despite its illegality in Cameroon, the prevalence of voluntary induced abortion was high in this study.

Problematic of Clandestine Induced Abortions in Three Maternity Hospitals of Chad

Background: In the world, induced abortion constitutes a preponderant cause of morbidity and maternal mortality, more particularly in developing countries. In these countries, the prevalence of contraception remains low, and situation makes the bed of unwanted pregnancies leading easily to the induced abortions. The objective was to determine frequency of clandestine induced abortions and to know the motivations of women that practice these abortions in order to find a solution to minimize this practice. Patients and method: We conducted a prospective, descriptive and multicenter survey for three months from November 1st, 2015 to January 31st, 2016 achieved at N’Djamena Mother and Child hospital which is national reference structure in terms reproduction health, Moundou Regional Hospital and Abéché Regional Hospital about the epidemiological aspects and complications clandestine induced abortions. The population of survey was constituted of patients admitted in a maternity of these hospitals for clandestine induced abortion. Every patient having practiced a documented induced abortion and having agreed to participate in the survey was included. Results: During the survey period, we recorded 94 cases of clandestine induced abortions among 2759 deliveries giving a frequency of 3.4%. The age group between 20 - 24 years was the most represented with 42.7%. The average age was 25.4 years, with the extremes ranging from 15 to 42 years. Singles (66%) dominated marital status. Sixty patients (63.9%) were of secondary. These patients were for the most part students or pupils (55.3%). Concerning the parity, nulliparous were the most numerous to practice the abortion (40.5%). More than half our patients (58.7%) knew no contraceptive method. The principal reason evoked to realize the abortion was further studies (38.2%). Means of abortion most used was the misoprostol (36 cases that is 38.2%). In this series, we observed 29 cases of complications, which is 30.8%. The complications were dominated by the anaemia (62.1%). Conclusion: The clandestine induced abortion is a frequent situation in the Chad and is cause of numerous complications.

Racial disparity in years of potential life lost to induced abortions

The magnitude of the overall prevalence and racial disparity in induced abortion suggests that it is a major influence on the demographic and socioeconomic composition of the population of the United States (US). However, the years of potential lives averted by induced abortion have not been systematically studied. We applied race-specific intra-uterine death estimates to the induced abortions occurring to non-Hispanic (NH) white and non-Hispanic (NH) black women in the US state of North Carolina in 2008. The resultant estimate of births averted by induced abortion was used to project years of potential life lost. All-cause detailed mortality data were used to compare induced abortion with other contributing causes of years of potential life lost before age 75 (YPLL 75). For NH whites, induced abortions in 2008 contributed 59% of total YPLL 75, and 1.5 times the total YPLL 75 from all other causes combined. For NH blacks, induced abortions in 2008 contributed 76% of total YPLL 75 and 3.2 times the total YPLL 75 from all other causes combined. Induced abortion is the overwhelmingly predominant contributing cause of preventable potential lives lost in the North Carolina population, and NH blacks are disproportionately affected.

Clinical Effects of Lithospermum Ruderale Dosage and Using-time on Medicinal Abortion Induced by Mifepristone and Misoprostol

The clinical effects of dosage during the period of treatment of Lithospermum Ruderale extract-a kind of Chinese traditional herbal medicine-on medicinal abortion induced by mifepristone and misoprostol were studied. Lithospermum Ruderale extract was administrated 3 d before, 3 d after or 3 d before plus 3 d after the administration of misoprostol respectively. The dose of Lithospermum Ruderale extract was 50 g, 75 g or 100 g respectively. Thus 1 350 women of early pregnancy were grouped into 9 groups and observed. The results showed that the effects of Lithospermum Ruderale used 3 d before, and 3 d before plus 3 d after (6 days misoprostol were significantly better than those only used 3 d after misoprostol both for complete abortion and bleeding (P<0.05). The dosage between 50 g and 100 g made no significant difference in clinical effects. Therefore it is reasonable to use 50 g Lithospermum Ruderale before misoprostol to improve medicinal abortion.

Comparative Study of Sublingual and Vaginal Misoprostol in Second Trimester Induced Abortion

Background: To identify an effective misoprostol-only regime for the termination of second trimester pregnancy. Objectives: To compare the efficacy, safety and acceptability of sublingual and vaginal misoprostol for second trimester pregnancy termination. Methods: In a prospective randomized comparative study, over 138 pregnant women at 13 - 20 weeks (91 - 140 days) of gestation requiring medical abortion were randomly assigned to the sublingual or vaginal route for misoprostol administration with dose schedule of 400 mcg every 3 hours up to 5 doses within 24 hours. The course of misoprostol was repeated if the woman did not abort within 24 hours. Primary outcome was the efficacy of the treatment to terminate pregnancy completely at 24 and 48 hours. Secondary outcomes measured were induction-abortion interval, side effects, failure rate, and women’s perception to these treatments. Results: At 24 h, the complete abortion rate was?87.88% in the vaginal administration group and 79.41% in sublingual group (difference 8.5%, 95%?CI: 3.8 to 13.2). No significant difference in the complete abortion rates was observed at 48 h(90.91% versus 88.24% difference: 2.7%, 95% CI: ?0.04 to 5.4) when vaginal and sublingual?groups were compared. Mean induction-abortion interval in sublingual and vaginal groups was 12.28 h (95% CI of mean 11.019 - 13.541 h) and 13.11 h (95% CI of mean 12.0301 - 14.1899 h) respectively;p = 0.485. The rates of side effects were similar in both groups except for fever, which was more common in vaginal group. Significantly more women in the sublingual group preferred the route as compared to vaginal administration (RR 1.618. 95% CI: 1.277 - 2.050;p < 0.0001). Conclusion: Both sublingual and vaginal routes of misoprostol are equally effective in medical termination of pregnancy in second trimester but sublingual route was preferred by the women.

Application of the painless technique for visual induced abortion in early pregnancy clinic female

Objective: This project is to analyze and evaluate the efYect of the painless technique in the visual induced abortion. Methods: 300 pregnant women who needed induced abortion and had no contraindication were selected as the research objects. Under the condition of the informed consent of the pregnant women, they were divided into two groups according to the different methods of the induced abortion. 150 cases in the observation group were treated with the painless technique for visual abortion, and 150 cases in the control group were treated with the painless technique for the blind curettage. Relevant surgical indicators and complications were compared between the two groups. Results: The operation time, the vaginal bleeding time, the induced abortion syndrome, the uterine aspiration incompleteness, and the postoperative infection in the observation group were significantly lower than those in the control group. The difference between the two groups was significant (P 0.05), with the statistical significance. The incidence of complications in the observation group (8.33%) was significantly lower than that in the control group (37.50%). The difference between the two groups was significant (P 0.05), with the statistical significance. Conclusion: The visual induced abortion with the painless technique is of great value in the outpatient induced abortion, and it is worth adopting and applying.

INFLUENCE OF ELECTROACUPUNCTURE ON ARTIFICIAL ABORTION- INDUCED SIDE EFFECTS

In the present study, the effect of electroacupuncture (EA) of acupoints of Ren, Spleen and Stomach Meridians on artificial abortion induced side effects was observed in 100 artificial abortion women. In comparison with 45 artificial abortion women in the control group (who had not accepted EA treatment), EA possessed significant effects in relieving abdominal pain, reducing vaginal bleeding duration, lowering infection rate and infertility rate after artificial abortion operation.

Coupled multiphysical model for investigation of influence factors in the application of microbially induced calcite precipitation

The study presents a comprehensive coupled thermo-bio-chemo-hydraulic(T-BCH)modeling framework for stabilizing soils using microbially induced calcite precipitation(MICP).The numerical model considers relevant multiphysics involved in MICP,such as bacterial ureolytic activities,biochemical reactions,multiphase and multicomponent transport,and alteration of the porosity and permeability.The model incorporates multiphysical coupling effects through well-established constitutive relations that connect parameters and variables from different physical fields.It was implemented in the open-source finite element code OpenGeoSys(OGS),and a semi-staggered solution strategy was designed to solve the couplings,allowing for flexible model settings.Therefore,the developed model can be easily adapted to simulate MICP applications in different scenarios.The numerical model was employed to analyze the effect of various factors,including temperature,injection strategies,and application scales.Besides,a TBCH modeling study was conducted on the laboratory-scale domain to analyze the effects of temperature on urease activity and precipitated calcium carbonate.To understand the scale dependency of MICP treatment,a large-scale heterogeneous domain was subjected to variable biochemical injection strategies.The simulations conducted at the field-scale guided the selection of an injection strategy to achieve the desired type and amount of precipitation.Additionally,the study emphasized the potential of numerical models as reliable tools for optimizing future developments in field-scale MICP treatment.The present study demonstrates the potential of this numerical framework for designing and optimizing the MICP applications in laboratory-,prototype-,and field-scale scenarios.

Patterns of Infertility and Abortion in Saudi Arabia: A Cross-Sectional Study

Background: Infertility and abortion are significant reproductive health concerns globally, impacting individuals' well-being and healthcare systems. In Saudi Arabia, cultural, social, and religious factors influence perceptions and management of these issues, necessitating research to understand the patterns and associated factors. Study Aim: This cross-sectional study aimed to investigate the patterns of infertility and abortion among 458 women in Saudi Arabia, focusing on demographic profiles, reproductive histories, medical conditions, and lifestyle factors. Methodology: Participants were recruited from healthcare facilities, and data on age, BMI, reproductive history, medical conditions, assisted reproduction methods, and lifestyle behaviors were collected. Statistical analyses, including chi-square tests, were conducted to examine associations between variables. Results: The majority of participants were aged 30 - 39 years (47.4%), with 76.9% experiencing secondary infertility. Among those with offspring (76.9%), 31% reported using assisted reproduction methods, primarily ovarian stimulators (54.2%). Abortion history was reported by 39.5% of participants. Significant associations were found between age and infertility type (X2 = 5.8, p = 0.054), having offspring and infertility type (X2 = 458.0, p = 0.001), menstrual irregularity and infertility type (X2 = 11.4, p = 0.001), and abortion history and delayed fertility (X2 = 10.4, p = 0.001). Conclusion: Our study reveals significant associations between demographic, medical, and lifestyle factors with infertility patterns and abortion history among Saudi women. These findings emphasize the need for tailored interventions addressing medical conditions, age-related factors, and access to reproductive healthcare services.

Implications for fault reactivation and seismicity induced by hydraulic fracturing

Evaluating the physical mechanisms that link hydraulic fracturing(HF) operations to induced earthquakes and the anticipated form of the resulting events is significant in informing subsurface fluid injection operations. Current understanding supports the overriding role of the effective stress magnitude in triggering earthquakes, while the impact of change rate of effective stress has not been systematically addressed. In this work, a modified critical stiffness was brought up to investigate the likelihood, impact,and mitigation of induced seismicity during and after hydraulic fracturing by developing a poroelastic model based on rate-and-state fraction law and linear stability analysis. In the new criterion, the change rate of effective stress was considered a key variable to explore the evolution of this criterion and hence the likelihood of instability slip of fault. A coupled fluid flow-deformation model was used to represent the entire hydraulic fracturing process in COMSOL Multiphysics. The possibility of triggering an earthquake throughout the entire hydraulic fracturing process, from fracturing to cessation, was investigated considering different fault locations, orientations, and positions along the fault. The competition between the effects of the magnitude and change rate of effective stress was notable at each fracturing stage. The effective stress magnitude is a significant controlling factor during fracturing events, with the change rate dominating when fracturing is suddenly started or stopped. Instability dominates when the magnitude of the effective stress increases(constant injection at each fracturing stage) and the change rate of effective stress decreases(the injection process is suddenly stopped). Fracturing with a high injection rate, a fault adjacent to the hydraulic fracturing location and the position of the junction between the reservoir and fault are important to reduce the Coulomb failure stress(CFS) and enhance the critical stiffness as the significant disturbance of stresses at these positions in the coupled process. Therefore,notable attention should be given to the injection rate during fracturing, fault position, and position along faults as important considerations to help reduce the potential for induced seismicity. Our model was verified and confirmed using the case of the Longmaxi Formation in the Sichuan Basin, China, in which the reported microseismic data were correlated with high critical stiffness values. This work supplies new thoughts of the seismic risk associated with HF engineering.

Patient-derived induced pluripotent stem cells with a MERTK mutation exhibit cell junction abnormalities and aberrant cellular differentiation potential

BACKGROUND Human induced pluripotent stem cell(hiPSC)technology is a valuable tool for generating patient-specific stem cells,facilitating disease modeling,and invest-igating disease mechanisms.However,iPSCs carrying specific mutations may limit their clinical applications due to certain inherent characteristics.AIM To investigate the impact of MERTK mutations on hiPSCs and determine whether hiPSC-derived extracellular vesicles(EVs)influence anomalous cell junction and differentiation potential.METHODS We employed a non-integrating reprogramming technique to generate peripheral blood-derived hiPSCs with and hiPSCs without a MERTK mutation.Chromo-somal karyotype analysis,flow cytometry,and immunofluorescent staining were utilized for hiPSC identification.Transcriptomics and proteomics were employed to elucidate the expression patterns associated with cell junction abnormalities and cellular differentiation potential.Additionally,EVs were isolated from the supernatant,and their RNA and protein cargos were examined to investigate the involvement of hiPSC-derived EVs in stem cell junction and differentiation.RESULTS The generated hiPSCs,both with and without a MERTK mutation,exhibited normal karyotype and expressed pluripotency markers;however,hiPSCs with a MERTK mutation demonstrated anomalous adhesion capability and differentiation potential,as confirmed by transcriptomic and proteomic profiling.Furthermore,hiPSC-derived EVs were involved in various biological processes,including cell junction and differentiation.CONCLUSION HiPSCs with a MERTK mutation displayed altered junction characteristics and aberrant differentiation potential.Furthermore,hiPSC-derived EVs played a regulatory role in various biological processes,including cell junction and differentiation.