Comparison of terbutaline and atosiban as tocolytic agents in intrauterine repair of myelomeningocele: a retrospective cohort study

Abstract Background: Myelomeningocele (MMC) is a neural tube defect disease. Antenatal repair of fetal MMC is an alternative to postnatal repair. Many agents can be used as tocolytics during the in utero fetal repair such as β2-agonists and oxytocin receptor antagonists, with possible maternal and fetal repercussions. This study aims to compare maternal arterial blood gas analysis between terbutaline or atosiban, as tocolytic agents, during intrauterine MMC repair. Methods: Retrospective cohort study. Patients were divided into two groups depending on the main tocolytic agent used during intrauterine MMC repair: atosiban (16) or terbutaline (9). Maternal arterial blood gas samples were analyzed on three moments: post induction (baseline, before the start of tocolysis), before extubation, and two hours after the end of the surgery. Results: Twenty-five patients were included and assessed. Before extubation, the terbutaline group showed lower arterial pH (7.347 ± 0.05 vs. 7.396 ± 0.02 for atosiban, p = 0.006) and higher arterial lactate (28.33 ± 12.76 mg.dL-1 vs. 13.06 ± 6.35 mg.dL-1, for atosiban, p = 0.001) levels. Conclusions: Patients who received terbutaline had more acidosis and higher levels of lactate, compared to those who received atosiban, during intrauterine fetal MMC repair.

Clinical safety and efficacy of atosiban brief duration 14-hour treatment regimen in delaying preterm labor

Background: For preventing preterm labor, the recommended duration of atosiban infusion is 48 hours and the patient has to be hospitalized during the course of treatment. The treatment consists of administering one vial of 0.9 ml as a bolus and then an infusion at a rate of 300 mcg/min for 3 hours followed by 100 mcg/min for the next 45 hours, utilizing nine vials of 5 ml. The objective of the study was to evaluate an alternative brief duration (14-hour) of atosiban treatment involving a bolus dose of 0.9 ml followed by an infusion of 300 mcg/min for 2 hours and 100 mcg/min for the next 12 hours utilizing 3 vials of 5 ml. The advantage being that the treatment could be completed in an outpatient setup and be convenient for the patient as well as for the healthcare staff. This would also reduce the overall cost of the treatment. This prospective single-center study was conducted to evaluate the efficacy and safety of an atosiban brief duration (14-hour) treatment regimen to prevent preterm labor.Methods: A total of 50 patients with symptoms of preterm labor were enrolled in the study. The efficacy of tocolysis was determined by the percentage of patients who remained undelivered up to 48 hours after atosiban therapy initiation and the follow-up of the patients was done up to delivery. Safety was assessed in terms of the number of maternal and fetal adverse events reported.Results: The mean gestational age at the enrolment was 32.1±2.6 weeks and the delivery were delayed by a mean of 18.13±17.97 days (range 1-62 days). Thirty-five (70%) patients remained undelivered at 48 hours and 29 (58%) at 7 days. No maternal or fetal adverse events were reported during the study.Conclusions: A favourable safety and efficacy profile of a brief duration atosiban regimen was observed resulting in ease of administration and a shorter stay in the healthcare facility providing convenience to both patient and hospital staff. The overall cost of the therapy was also reduced. Further clinical trials with larger sample size are required to confirm the findings.

Study on the Spatial-Temporal Deduction of the Mechanism and the Modernization of the System of"Syndrome-Prescription-Herbs"in tocolysis Based on the Theory of"Fetal Stem is Tied to the Spleen" / 世界科学技术-中医药现代化

Modern Traditional Chinese Medicine(TCM)physicians believed that"reproduction depends on the kidney"theory is the key in treating fetal leakage,fetal restlessness,slippery fetus and other diseases.However,before the Ming and Qing Dynasties,ancient physicians paid special attention to the theory of"Qi and blood in the spleen and stomach".The"the stem of fetal ties the spleen"came from the summary of Zhao Xianke's"Handan manuscripts"based on analogy of nature in Ming dynasty.However,at present,the relevant research reports on"spleen"and tocolysis are fragmented,and the theoretical traceability,clinical effects and experimental research are not systematically discussed.Based on the"fetal stem ties the spleen"theory,through integrated research,taking the differentiation of ancient and modern theories of traditional Chinese medicine gynecology as the"longitude",and the progress of modern biological research on"syndromes,prescriptions and components"as the"latitude".This study is an initial attempt to reveal the key inflection points deductively in the empty space(territorial schools)during(history and history of)tocolysis,and to systematically explore the"spleen main Qi","spleen main transportation","spleen main rising Qing"and"spleen main muscle",which are associated with the progress of the objectification and the bottleneck of research on the treatment of tocolysis.Furthermore,it is proposed that TCM prescription syndrome metabolism and spatiotemporal omics are the important trends to solve the disputes and difficulties in the study of tocolysis in the future,and provide a new reference idea for the inheritance,innovation,breakthrough and accurate research of modern TCM reproductive theory.

Angelica sinensis polysaccharides improve Th1/Th2 imbalance and protect pregnancy in threatened abortion model rats / 中国药房

OBJECTIVE To study the tocolysis effects of Angelica sinensis polysaccharides on threatened abortion model rats and their impacts on Th1/Th2 balance by regulating the phosphoinositide 3-kinase （PI3K）/protein kinase B （AKT） signaling pathway. METHODS Pregnant rats were randomly grouped into the control group， model group， A. sinensis polysaccharide group （200 mg/kg）， PI3K/AKT signaling pathway inhibitor LY294002 group （5 mg/kg）， and A. sinensis polysaccharide+LY294002 group （200 mg/kg A. sinensis polysaccharide+5 mg/kg LY294002）， with 10 rats in each group. Except for the control group， rats in all other groups were given mifepristone （8.3 mg/kg） and misoprostol （100 μg/kg） intragastrically to establish a threatened abortion model， and intragastric or intraperitoneal injection of corresponding drugs. The serum levels of estrogen， progesterone， interferon-γ （IFN-γ）， tumor necrosis factor-α （TNF-α）， and interleukin-4 （IL-4） in each group of rats were detected， and the uterine ovarian index and embryonic mortality rate of rats in each group were measured； the morphology of uterine tissue in rats was observed in each group； Th1/Th2 balance in peripheral blood of rats as well as the expression of PI3K/AKT signaling pathway-related proteins in the uterine tissues of rats in each group were detected. RESULTS Compared with the control group， the uterine tissue of rats in the model group showed pathological damage； the serum levels of estrogen， progesterone and IL-4， uterine ovarian index， peripheral blood Th2 cell ratio， and the ratios of phosphorylated PI3K （p-PI3K）/PI3K and phosphorylated AKT （p-AKT）/AKT in uterine tissue were all decreased （P＜0.05）； the embryo mortality rate， Th1 cell ratio， Th1/Th2 ratio， and serum levels of IFN-γ and TNF-α were increased （P＜0.05）. Compared with the model group， the pathological damage of uterine tissue in the A. sinensis polysaccharide group was reduced， and the above indexes were all improved significantly （P＜0.05）； LY294002 could weaken the effect of A. sinensis polysaccharide on model rats （P＜0.05）. CONCLUSIONS A. sinensis polysaccharides can improve Th1/Th2 imbalance in threatened abortion model rats by activating the PI3K/AKT signaling pathway， thereby inhibiting immune inflammation， and promoting embryo survival.

Parto Prematuro: Tratamiento con nifedipino versus atosiban. Revisión Bibliográfica Teórica / Preterm Labor: nifedipine vs atosiban treatment. Bilbiographic theoretical review

Introducción: La amenaza de parto pretérmino es un problema de salud pública mundial y nacional. La prematuridad viene acompañada de complicaciones como inmadurez pulmonar y lesiones del sistema nervioso central, que requieren de tratamiento oportuno.Objetivo: Establecer una comparación objetiva de los resultados del tratamiento de la ame-naza de parto prematuro, mediante el uso de Nifedipina o Atosiban, realizando una revisión teórica actualizada del tema, con el propósito de ofrecer a la comunidad científica, una he-rramienta de consulta, sobre un tema frecuente y de alto riesgo materno fetal.Materiales y Métodos: Se realizó una búsqueda bibliográfica en las bases de datos: Google Scholar, Pubmed, Wiley Online Library, Biomed, Scopus, Medes, Medline, Pro Quest, Gale, Scopus, y ScIELO, Se incluyeron artículos publicados en revistas indexadas de alto impacto, en los últimos 5 años. Se valoró la calidad de los artículos incluidos, utilizando la metodología de Sacket, y el riesgo de sesgo, según la metodología Cochrane. Resultados: Se observó un consenso entre los autores consultados en que no existen dife-rencias significativas en el efecto tocolítico de atosiban y nifedipino Conclusiones:La literatura académica parece coincidir en que la efectividad de atosiban y ni-fedipino como agentes tocolíticos es similar, con ambos medicamentos se consigue prolongar el embarazo con riesgo de parto pretérmino, que es el propósito fundamental de la tocolisis.

Background: The threat of preterm birth is a global and national public health problem. Prematurity is linked to complications such as pulmonary immaturity and central nervous system lesions, which require timely treatment. Objective: To perform an objective comparison of the results of the treatment of the threat of premature delivery, using nifedipine or atosiban, carrying out an updated theoretical review of the subject, to offer the scientific community a tool for research on a frequent subject of high maternal and fetal risk. Materials y Methods: There was a bibliographic search in specialized databases. Articles published in high impact indexed journals in the last 5 years were included. The quality of the articles included was assessed, using the Sacket methodology, and the risk of bias, accor-ding to the Cochrane methodology. Results: There was an agreement among the authors consulted there are no significant differences in the tocolytic effect of atosiban and nifedipine. Conclusions: The academic literature seems to agree that the effectiveness of atosiban and nifedipine as tocolytic agents is similar, with both drugs prolonging pregnancy with the risk of preterm delivery, which is the fundamental purpose of tocolysis.

Sulfato de magnésio: principais utilizações na obstetrícia contemporânea / Magnesium sulphate: main uses in contemporary obstetrics

O sulfato de magnésio tem sido utilizado em obstetrícia por décadas e milhares de mulheres já foram incluídas em ensaios clínicos que estudaram sua eficácia em uma variedade de condições gestacionais. Os principais usos do medicamento na atual prática obstétrica incluem prevenção e tratamento de convulsões eclâmpticas, prolongamento da gravidez para administração antenatal de corticosteroides e neuroproteção fetal na iminência de interrupção prematura da gravidez. Em função da alta qualidade e da consistência dos resultados de importantes ensaios clínicos, a indicação do sulfato de magnésio para profilaxia e terapia das convulsões eclâmpticas está bem estabelecida. Entretanto, tal unanimidade não ocorre com relação ao seu emprego como tocolítico, tanto pela discussão sobre sua efetividade quanto pelas doses mais altas usualmente utilizadas para esse fim. Em relação à importância do sulfato de magnésio como agente neuroprotetor fetal, a paralisia cerebral é a causa mais comum de deficiência motora na infância e tem como fator de risco mais importante a prematuridade, cuja incidência tem aumentado significativamente. Diretrizes nacionais e internacionais mais recentes, baseadas em resultados de ensaios clínicos randomizados e metanálises de boa qualidade, mostraram que a administração antenatal de sulfato de magnésio na iminência de parto pré-termo precoce é uma intervenção eficiente, viável, segura, com boa relação custo-benefício e pode contribuir para a melhoria dos desfechos neurológicos neonatais.

Magnesium sulfate has been used in obstetrics for decades and thousands of women have already been included in clinical trials that have studied its effectiveness in a variety of gestational conditions. The main uses of the drug in current obstetrical practice include prevention and treatment of eclamptic seizures, prolongation of pregnancy for antenatal administration of corticosteroids, and fetal neuroprotection in the imminence of premature termination of pregnancy. Because of the high quality and consistency of the results of important clinical trials, the indication of magnesium sulfate for prophylaxis and therapy of eclamptic seizures is well established. However, such unanimity does not occur regarding its use as tocolytic, either by the discussion of its effectiveness or by the higher doses usually used for this purpose. Regarding the importance of magnesium sulfate as a fetal neuroprotective agent, cerebral palsy is the most common cause of motor deficits in childhood and has a significantly higher incidence of prematurity as a major risk factor. More recent national and international guidelines, based on results from randomized controlled trials and good quality meta-analyzes, have shown that the antenatal administration of magnesium sulfate at the imminence of early preterm delivery is a cost-effective, viable, efficient intervention and safe and can contribute to the improvement of neonatal neurological outcomes.

Vaginal progesterone after tocolytic therapy in threatened preterm labour

Background: Currently preterm labour is one of the most challenging problem faced by both obstetricians and perinatologists, this episode in the course of woman’s pregnancy takes a heavy tool for perinatal mortality which accounts for approximately 50-75%. The incidence of preterm labour is estimated to be 5-10% of all pregnancies.Methods: It was a prospective randomize control trail over a period of 3 year at department of obstetrics and gynecology, tertiary care hospital Pune, Maharashtra, India. Total 100 subjects were randomized into two groups with group one receiving vaginal micronized progesterone and group two control group receiving only tocolytics and steroids. Subsequently authors compared the safety and efficacy of vaginal micronized progesterone versus placebo as a maintenance therapy in preventing preterm labour.Results: This analysis showed that women who randomized to progesterone prophylaxis had a significantly increase in duration of pregnancy. The mean of birthweight in Group A and Group B was 2963±36 gm and 2567±49 gm and respectively which confirmed the positive effects of progesterone on increasing infants’ weights at birth.Conclusions: Authors concluded that progesterone therapy had acceptable efficacy in the prevention of preterm labor in terms of prolongation of delivery and by increasing gestational age at delivery.

Maternal and fetal parameters in pregnant woman undergoing tocolysis with nifedipine / Parâmetros maternos e fetais em gestante submetida a tocólise com nifedipina

Abstract Objectives: to evaluate the effects of nifedipine with tocolysis under maternal and fetal parameters. Methods: a cohort study with 40 pregnant women admitted at a high-risk pregnancy ward to inhibit premature labor between September/2010 to May/2012. Nifedipine was used as a 20mg sublingual attack dose and maintained 20mg every six and eight hours orally. The variables of the analysis were fetal heart rate (FHR), maternal heart rate (MHR), systolic blood pressure (SBP) and diastolic blood pressure (DBP), and amniotic fluid index (AFI). All the variables were evaluated prior to administrating nifedipine and approximately after 6 hours and every 24 hours, until hospital discharge. Results: there were no modification of the FHR (p=0.48) and the SBP (p=0.29). The MHR increased after 24 hours, but with no statistical difference (p=0.08), returning to similar levels as at admission within 48 hours. The DBP decreased at 6 (p=0.04) to 72 hours, being stable afterwards. The AFI decreased significantly at 24, 48 and 72 hours. Conclusions: the use of high doses of nifedipine with tocolysis causes a decrease of the maternal's diastolic blood pressure and consequently decreases the amniotic fluid index, but probably without any clinical repercussions.

Resumo Objetivos: avaliar os efeitos da nifedipina utilizada na tocólise sobre os parâmetros maternos e fetais. Métodos: estudo de coorte incluindo 40 gestantes admitidas na enfermaria de alto risco para inibição do trabalho de parto prematuro entre setembro/2010 a maio/2012. Utilizou-se a nifedipina sublingual na dose de ataque de 20mg e uma manutenção de 20mg por via oral a cada seis e oito horas. As variáveis avaliadas foram os batimentos cardio-fetais (BCF), frequência cardíaca materna (FCM), pressão arterial sistólica (PAS) e diastólica (PAD) e índice de líquido amniótico (ILA). Todas as variáveis foram avaliadas antes da administração da nifedipina e aproximadamente após 6h e cada 24h até alta hospitalar. Resultados: não houve modificação dos BCF (p=0,48) e da PAS (p=0,29). A FCM aumentou após 24h, mas sem significância estatística (p=0,08) retornando a níveis similares ao da admissão com 48h. A PAD diminuiua partir de 6h (p = 0,04)até 72h, mantendo-se constante. O ILA diminuiu significativamente em 24h, 48h e 72h. Conclusão: a utilização de altas doses de nifedipina para tocóliseocasio na diminuição dos níveis pressóricos diastólicos maternos e consequentemente diminuição do ILA, mas provavelmente sem repercussões clínicas.

A influência da ocitocina e do antagonista do receptor de ocitocina no metabolismo ósseo, estresse oxidativo, padrões da marcha e análise do tipo ansioso de ratas senescentes / The influence of oxytocin and the oxytocin receptor antagonist on bone metabolism, oxidative stress, gait and analysis of the anxious type of senescent rats

O objetivo deste estudo foi avaliar a ação da ocitocina (OT) endógena, bem como o efeito potencializador da OT exógena sobre o metabolismo ósseo, estresse oxidativo, marcha e análise do tipo ansioso de ratas na periestropausa. Ao completar 19 meses, os animais receberam injeções de solução salina (0,15M/ip), Atosiban (AT) (At; 300 µg/Kg/ip), OT (Ot; 134 µg/Kg/ip) ou At+Ot (injeções de OT 5 minutos após AT), sendo duas injeções de cada substância por dia, com intervalos de 12 horas entre elas, a cada 30 dias até a idade de 21 meses. Após trinta dias sem tratamentos, foi realizada a coleta de amostras biológicas. Aspartato aminotransferase (AST), marcador de dano hepático, foi menor em Ot e At+Ot. Substância ácida reativa ao ácido tiobarbitúrico (TBARs É¥mol/L), marcador do dano oxidativo lipídico, foi maior no grupo Ot comparado ao At (p = 0,0093), e menor no At+Ot em relação ao Ot (p = 0,0040). Houve maior defesa antioxidante enzimática avaliada por meio da superóxido dismutase (SOD) no grupo Ot em comparação ao Veh (p < 0,0312). Por sua vez, no grupo At houve maior atividade enzimática da fosfatase alcalina (FAL) em relação ao Veh e Ot (p < 0,0001; At+Ot: p = 0,0015). A espessura do tecido ósseo compacto foi menor no grupo At em relação ao Veh (p = 0,0228), no entanto, foi maior no grupo Ot em relação ao Veh e At (p = 0,0132, p < 0,0001); no grupo At+Ot foi menor quando comparado ao grupo Ot (p = 0,0003). O número de trabéculas ósseas foi menor no grupo At comparado ao Veh (p = 0,0240), e maior em Ot em relação ao At (p = 0,0084). Quanto a análise imunoistoquímica realizada no osso cortical do colo do fêmur, o grupo Ot apresentou maior expressão de osteocalcina (OCN) em comparação aos grupos Veh e At (p = 0,05 e 0,0033), e menor expressão no grupo At+Ot em relação ao grupo Ot (p = 0,05). A expressão de fosfatase ácida resistente ao tartarato (TRAP) foi menor no grupo Ot comparado aos grupos Veh e At (p = 0,05 e 0,0033), contudo foi maior no grupo At+Ot comparado ao Ot (p = 0,05). A densidade mineral óssea areal (DMO) foi significativamente maior nos grupos Ot e At+Ot em relação à Veh (p < 0,0001) e grupo At (p = 0,0231, p = 0,0418). Por sua vez, a relação mineral-matriz (vPO4/Proline) foi maior e a substituição de carbonato tipo B (CO3/vPO4) foi menor no grupo Veh. O teste de deambulação por comprimento (cm) usado para avaliar função musculoesquelética, aumentou em última análise no grupo Ot em relação ao grupo Veh - F (p = 0,0078), At - F (p = 0,0023), bem como aumentou sobre Ot - I (p = 0,0094). O teste do labirinto, usado para estudar o comportamento chamado "tipo ansioso", demonstrou que a OT inverte a redução nas entradas dos braços fechados, reduz o tempo gasto no centro causado pelo At. Os resultados obtidos neste estudo demonstram que a OT ajuda a modular o ciclo de remodelação óssea de ratas senescentes, melhorando os parâmetros de densitometria óssea e os parâmetros funcionais musculoesquelético(AU)

The objective of this study was to evaluate the endogenous oxytocin (OT) action, as well as the potentiating effect of exogenous OT on the bone metabolism, oxidative stress, gait and analysis of the anxious type of rats in periestropause. Upon completing 19 months, the animals received injections of saline solution (0.15M/ip), Atosiban (AT) (At; 300 µg/Kg/ip), OT (Ot; 134 µg/Kg/ip) or At+Ot (OT injections 5 minutes after AT), being two injections of each substance per day, with intervals of 12 hours between them, every 30 days until the age of 21 months. After thirty days without treatment, biological samples were collected. Aspartate aminotransferase (AST), a marker of liver damage, was lower after Ot and At+Ot. Acid reactive substance to thiobarbituric acid (TBARs µmol/L), marker of lipid oxidative damage, was higher in the Ot group compared to At (p = 0.0093), and lower in At+Ot compared to Ot (p = 0.0040). There was a higher antioxidant enzymatic defense evaluated by means of superoxide dismutase (SOD) in the Ot group compared to Veh (p < 0.0312). In turn, in the At group there was greater alkaline phosphatase (FAL) enzymatic activity in relation to Veh and Ot (p < 0.0001; At+Ot: p = 0.0015). The thickness of the compact bone tissue was smaller in the At group in relation to Veh (p = 0.0228), however, it was greater in the Ot group in relation to Veh and At (p = 0.0132, p < 0.0001); in the At+Ot group it was smaller when compared to Ot (p = 0.0003). The number of bone trabecules was smaller in the At group compared to the Veh (p = 0.0240), and greater in Ot in relation to the At (p = 0.0084). As for the immunohistochemical analysis performed on the cortical bone of the femoral neck, the Ot group presented a higher expression of osteocalcin (OCN) compared to the Veh and At groups (p = 0.05 and 0.0033), and lower expression in the At+Ot group compared to the Ot group (p = 0.05). The tartrate-resistant acid phosphatase (TRAP) expression was lower in the Ot group compared to the Veh and At groups (p = 0.05 and 0.0033), however it was higher in the At+Ot group compared to Ot (p = 0.05). The sandal mineral density (BMD) was significantly higher in the Ot and At+Ot groups compared to Veh (p < 0.0001) and At group (p = 0.0231, p = 0.0418). In turn, the parent mineral ratio (vPO4/Proline) was higher and the replacement of carbonate type B (CO3/vPO4) was lower in the Veh group. The walking test per length (cm) used to evaluate musculoskeletal function was ultimately increased in group Ot in relation to group Veh - F (p = 0.0078), At - F (p = 0.0023), as well as increased over Ot - I (p = 0.0094). The labyrinth test, used to study the so-called "anxious type" behavior, demonstrated that the OT reverses the reduction in the entries of the closed arms, reducing the time spent in the center caused by At. The results obtained in this study show that the OT helps to modulate the cycle of bone remodeling of senescent rats, improving the parameters of bone densitometry and the musculoskeletal functional parameters(AU)

Oral nifedipine versus nitroglycerine patch for tocolysis in preterm labour

Background: Preterm delivery is a major cause of neonatal mortality and morbidity. Various modalities have been used to prediction of patient at risk of preterm labor. But due to multi-factorial etiology these predictors are not always useful. Tocolysis has a major role in arresting preterm labor. The purpose of this study was to compare the safety and efficacy of oral nifedipine with transdermal nitroglycerine in the inhibition of preterm labour.Methods: This single blinded randomized control trial was conducted in the labour room of department of Obstetrics and Gynecology from January 2011 to June 2012. One hundred women with singleton pregnancy between 28 weeks to 34 weeks preterm labour and no contraindication for tocolysis were enrolled in the study. After taking the informed consent subjects were randomized into two groups. Randomization was done by random number table. Fifty-one subjects in nifedipine group received oral nifedipine (Tab Depin 10mg). Forty-nine subjects receiving transdermal nitroglycerine patch (Nitroderm Patch 10) were included in NTG group. The variables analysed were delay in delivery for 48 hours, 7 days or more than 7 days, period of gestation at delivery and side effect profile of drugs.Results: The percentage of women delivering after 48hours of administration of nifedipine group (52.9%) and nitroglycerine group (53.1%). Failure of tocolysis, defined as delivery within 48 hours, with nitroglycerine group (32.7 %) was comparable to nifedipine (33.3 %). Headache was significantly higher in nitroglycerine group as compared to nifedipine group (p≤0.001). Maternal tachycardia was more common in nifedipine group compared to NTG group (p=0.001).Conclusions: Oral nifedipine and transdermal nitroglycerine have similar efficacy as tocolytic agent in patients with preterm labour.

Tocolysis among women with preterm birth: associated factors and outcomes from a Multicenter study in Brazil / Tocólise com parto prematuro: fatores associados e desfechos de um estudo multicêntrico no Brasil

Abstract Objective To evaluate the use of tocolysis in cases of preterm birth due to spontaneous preterm labor in a Brazilian sample. Methods A sample of 1,491 women with preterm birth due to spontaneous preterm labor were assessed, considering treatment with tocolysis or expectant management, according to gestational age at birth (< 34 weeks and 34 to 36 þ 6 weeks) and drugs prescribed. The study took place in 20 Brazilian hospitals from April 2011 to July 2012. Bivariate analyses were conducted to evaluate associations with sociodemographic and obstetric characteristics and odds ratios with their respective 95% confidence intervals were estimated for maternal and neonatal outcomes. Results A total of 1,491 cases of preterm birth were considered. Tocolysis was performed in 342 cases (23%), 233 of which (68.1%) were delivered before 34 weeks. Within the expectant management group, 73% was late preterm and with more advanced labor at the time of admission. The most used drugs were calcium channel blockers (62.3%), followed by betamimetics (33%). Among the subjects in the tocolysis group, there were more neonatal and maternal complications (majority non-severe) and an occurrence of corticosteroid use that was 29 higher than in the expectant management group. Conclusion Tocolysis is favored in cases of earlier labor and also among thosewith less than 34 weeks of gestation, using preferably calcium channel blockers, with success in achieving increased corticosteroid use. Tocolysis, in general, was related to higher maternal and neonatal complication rates, which may be due to the baseline difference between cases at admission. However, these results should raise awareness to tocolysis use.

Resumo Objetivo: Avaliar o uso da tocólise em partos prematuros decorrentes de trabalho de parto espontâneo numa amostra brasileira. Métodos Um total de 1.491 mulheres com parto prematuro decorrente de trabalho de parto espontâneo foram avaliadas, considerando a realização de tocólise ou conduta expectante, de acordo com a idade gestacional ao nascimento (< 34 semanas e 34 a 36 þ 6 semanas) e com as drogas prescritas. O estudo ocorreu em 20 hospitais brasileiros, de abril de 2011a julho de 2012. Análises bivariadas foram realizadas para avaliar associações com características sociodemográficas e obstétricas. Foram calculadas as relações de probabilidade comseus respectivos intervalos de confiança (95%) para os desfechos neonatais e maternos. Resultados Um total de 1.491 casos de partos prematuros foram considerados, e a tocólise foi realizada em 342 (23%) casos, dos quais 233 (68,1%) tiveram partos antes das 34 semanas. No grupo da conduta expectante, 73% forampré-termos tardios e com trabalho de parto mais avançado à admissão. As drogas mais utilizadas foram os bloqueadores do canal de cálcio (62.3%), seguidos pelos betamiméticos (33%). No grupo da tocólise houvemais complicações neonatais ematernas (maioria não grave) e um uso de corticosteroides 29 vezes mais frequente que nos casos de conduta expectante. Conclusão A tocólise foi mais favorável nos casos de trabalho de parto inicial e nos partos realizados antes de 34 semanas de gestação, usando preferencialmente bloqueadores do canal de cálcio, comsucesso em realizar altas taxas de corticoterapia. A tocólise esteve associada a maiores taxas de complicações maternas e neonatais, o que pode ser explicado pela diferença basal dos casos à admissão. Entretanto, esses resultados devem acender um alerta em relação ao uso de tocolíticos.

Effects of Yun Kang oral liquid on rats model of embryo implantation disorder / 中国应用生理学杂志

OBJECTIVE@#Through the establishment of abortion model caused by embryo implantation difficulties, exploring the role of Yun Kang oral liquid in protecting embryos.@*METHODS@#The pregnant rats were divided into 6 groups:normal control group (NC), model group (MG), dydrogesterone group (DT), and three dose groups of low, medium and high levels of Yun Kang oral liquid (YK-L, YK-M, YK-H), 11 in each group.From the first day of pregnancy, daily intragastric administration, the dose of DT group was 3.02 mg/kg, and the doses of Yun Kang oral liquid were 4, 6, and 9 ml/kg, respectively.The rats in NC and MG were treated with an equal volume of purified water for 10 days.On the third day of pregnancy, except for the NC group, the other groups were injected with mifepristone subcutaneously at the back of the neck at a dose of 5 mg/kg to cause an embryo implantation barrier model.On the 10th day of pregnancy, blood was collected from the abdominal aorta in each group.Serum follicle stimulating hormone (FSH), interferon-γ (IFN-γ) and interleukin (IL-4) were measured by enzyme-linked immunosorbent assay.The number of embryo implantation was observed in the uterus, and the pathological changes of the uterus were observed by HE staining.@*RESULTS@#Compared with the NC group, the number of embryo implantation and the serum levels of FSH and IL-4 in the MG group were decreased significantly (< 0.05, 0.01), and pathological changes such as uterine glandular epithelial hyperplasia and inflammatory cell infiltration in the glandular cavity were observed.Compared with MG group, the number of embryo implantation and serum FSH and IL-4 levels of rats in YK-M and YK-H groups were increased significantly (<0.05, 0.01).The pathological changes such as uterine glandular epithelial hyperplasia and inflammatory cell infiltration in the gland were also improved.There was no significant difference in serum IFN-γ levels between the groups.@*CONCLUSIONS@#Yun Kang oral liquid may improve the endometrial pathological changes and increase the number of embryo implantation by increasing the levels of serum sex hormone FSH and immune cytokine IL-4 in embryo implantation impediment rats.

Progesterona vaginal combinada con nifedipino en la prevención de parto pretermino con cervix corto / Vaginal progesterone combined with nifedipine in The prevention of pretermine labor with short cervix

Objetivo: evaluar los efectos de la progesterona vaginal combinada con nifedipino en comparación al uso único de Nifedipino en la amenaza de parto pretérmino en gestantes entre 24-34 semanas con longitud cervical ≤ a 25 mm en el Hospital Materno Infantil Germán Urquidi. Método: se realizó un estudio de cohorte, prospectivo, comparativo y analítico. Es un diseño de dos grupos (comparativos) donde la selección de pacientes se hizo de acuerdo a criterios de inclusión y exclusión, se evaluaron 231 pacientes. Resultados: el 67% de las pacientes que usaron progesterona más nifedipino resolvieron el evento de Amenaza de Parto Pretérmino en la primera hora en comparación al 50% de las pacientes que usaron solo nifedipino. Con la combinación de progesterona y nifedipino se controló en 1 hora el episodio de Amenaza de Parto Prematuro entre las 24 a 34 semanas de gestación, con el uso único de nifedipino, desde las 32 - 34 semanas existe un promedio de 2 horas en sobrepasar el episodio. Con solo nifedipino como tocolítico, el 80% de los pacientes verificaron parto a los 5 días. Solamente el 20% lograron sobrepasar los 10 días de latencia. La combinación progesterona y nifedipino logro que el 30% de las pacientes alcanzaran una latencia entre los 21-30 días, La edad gestacional al nacimiento con la combinación progesterona y Nifedipino alcanza en un 80% una edad menor o igual a 37 semanas 6 días. Conclusiones: La combinación de Progesterona vaginal más nifedipino, mejora sustancialmente el pronóstico neonatal en todos los resultados obtenidos, el uso único de nifedipino tiene menores efectos beneficiosos en esta investigación.

Objective: evaluate the effects of Vaginal Progesterone combined with nifedipine compared to the single use of nifedipine in the threat of preterm delivery in pregnant women between 24-34 weeks with cervical length ≤ 25mm in the Hospital Materno Infantil Germán Urquidi. Method: a prospective, comparative and analytical cohort study was conducted. It is a design of two groups (comparative) where the selection of patients was made according to inclusion and exclusion criteria, we evaluated 231 patients. Results: the time to exceed the Preterm Childbirth episode, 67% of the patients who used progesterone plus nifedipine resolved the event within the first hour compared to 50% of patients who used only nifedipine. With the combination of progesterone and nifedipine, the episode of Premature Birth Threat between 24 and 34 weeks of gestation was controlled within 1 hour, with the sole use of nifedipine, from 32-34 weeks there is an average of 2 hours in excess of episode. With only nifedipine as tocolytic, 80% of the patients verified delivery at 5 days. Only 20% were able to exceed 10 days of latency. The combination progesterone + nifedipine achieved that 30% of the patients reached a latency between 21-30 days, Gestational age at birth with the combination progesterone + nifedipino reaches 80% an age less than or equal to 37 weeks 6 days. Conclusions: the combination of vaginal progesterone plus nifedipine substantially improves the neonatal prognosis in all the results obtained, the use of nifedipine alone has less beneficial effects in this investigation.

Investigation on the Essence of Ancient and Modern"Tocolysis"Efficacy of Scutellaria baicalensis / 中国药房

OBJECTIVE:To provide reference for deepening the scientific connotation of"tocolysis"efficacy of Scutellaria baica-lensis. METHODS:The ancient and modern"tocolysis"efficacy of S. baicalensis were compared in respects of historical evolu-tion,ancient TCM theory and modern pharmacology;the reasons for the ancient and modern difference were inferred and analyzed. RESULTS:The"tocolysis"efficacy of S. baicalensis was recorded in many ancient herbal works.The"tocolysis"efficacy of S. ba-icalensis was associated with bitter taste and cold nature,but differentiation of symptoms and signs should be based on the basic theory of TCM.At the same time,The"tocolysis"efficacy of S. baicalensis was also accoiated with the effects of clearing heat and anti-inflammatory,inhibiting viral replication,enhancing immunity and inhibiting uterine contraction. The difference of ancient and modern"tocolysis"efficacy of S. baicalensis had a great relationship with changes in genuineness,the difference in understanding of the concept of ancient and modern"tocolysis"and changes in clinical application. CONCLUSIONS:It provides reference for further study and clinical application of S.baicalensis to understand the difference of ancient and modern"tocolysis"efficacy.

Investigation on the Essence of Ancient and Modern"Tocolysis"Efficacy of Scutellaria baicalensis / 中国药房

OBJECTIVE:To provide reference for deepening the scientific connotation of"tocolysis"efficacy of Scutellaria baica-lensis. METHODS:The ancient and modern"tocolysis"efficacy of S. baicalensis were compared in respects of historical evolu-tion,ancient TCM theory and modern pharmacology;the reasons for the ancient and modern difference were inferred and analyzed. RESULTS:The"tocolysis"efficacy of S. baicalensis was recorded in many ancient herbal works.The"tocolysis"efficacy of S. ba-icalensis was associated with bitter taste and cold nature,but differentiation of symptoms and signs should be based on the basic theory of TCM.At the same time,The"tocolysis"efficacy of S. baicalensis was also accoiated with the effects of clearing heat and anti-inflammatory,inhibiting viral replication,enhancing immunity and inhibiting uterine contraction. The difference of ancient and modern"tocolysis"efficacy of S. baicalensis had a great relationship with changes in genuineness,the difference in understanding of the concept of ancient and modern"tocolysis"and changes in clinical application. CONCLUSIONS:It provides reference for further study and clinical application of S.baicalensis to understand the difference of ancient and modern"tocolysis"efficacy.

Effect of ritodrine hydrochloride on peripheral blood and tocolysis rate of patients with threatened premature labor / 中国生化药物杂志

Objective To observe the effect of ritodrine hydrochloride on peripheral blood and tocolysis rate of patients with threatened premature labor.Methods89 cases of patients with threatened premature labor were selected from October 2015 to September 2016 and randomly divided into two groups, research group with 45 cases treated with ritodrine hydrochloride and control group with 44 cases treated with epsom salt.The peripheral blood, extinction time of uterine contraction, extended days of pregnancy, postpartum hemorrhage, neonatal birth weight and tocolysis rate were compared between two groups.ResultsAfter treatment, CRH, NO, PGE2 and IL-8 of control group were obviously higher than research group, the difference was statistically significant (t=10.826,3.839,7.534,8.075,P0.05).The overall efficacy of tocolysis in control group was 70.5%, while that in research group was 86.7%, which was obviously higher than the control group, the difference was statistically significant (χ2=7.801,P<0.05).ConclusionRitodrine hydrochloride can effectively control uterine contraction factor in peripheral blood and extend gestational days of patients with threatened premature labor, so as to improve tocolysis rate and birth quality.

The Clinical Experience of Atosiban in Preterm Labour.

Aims: To evaluate the efficacy, safety and tolerability of atosiban in delaying preterm labour. Study Design: A prospective, open label, non comparative study. Place of Study: Lokmanya Tilak Municipal Medical College Mumbai, India. Methodology: Pregnant women (N=110) between the gestational age of 24 to 34 weeks, presenting with signs of preterm labour were enrolled in the study. Efficacy, safety and tolerability of Atosiban were assessed for a period of 72 hrs. Results: Ninety Eight patients (89.09%) remained undelivered up to 72 hrs after completion of treatment phase and ninety seven patients (88.18%) till the end of their hospital stay (upto 7 days). There were six patients with twin and one with quadruplet pregnancy; atosiban therapy was successful in delaying labour upto discharge from hospital in all the seven patients. The study medication was well tolerated as no adverse events were observed throughout the study duration. Conclusion: Atosiban, an oxytocin receptor antagonist, has proven to be an effective and well tolerated tocolytic drug and because of its favourable safety profile, it may be the best choice as a tocolytic therapy to delay the preterm labour.

Professor Liu Hongqi's Experience in the Treatment of Threatened Abortion / 浙江中医药大学学报

Objective]Summary of Professor Liu Hongqi in treating the spleen kidney two deficiency, deficiency of Qi and blood type, kidney deficiency and blood type of threatened abortion experience. [Method]Reading a lot of literatures, combined with the clinical common disease type, respectively, from the basic pathogenesis, basic treatment, and motion etc. summarize professor of treatment of this disease, and 1 case was attached.[Result]Professor Liu Hongqi believes that the clinical syndromes of this disease were spleen and kidney two empty, deficiency of Qi and blood and blood deficiency of the kidney, the incidence of kidney and spleen, closely related. Professor summed up the kidney and spleen during the long clinical course, Yiqi Yangxue Bushen tocolysis and clearing heat, cooling blood to stop bleeding method, were used on prescription Ma ginseng tocolysis particles, the Liangdi Antai Granuales added and subtracting tocolysis, collaborative western medicine, with emotion, achieved a significant effect. Case accurate, fully reflected the clinical experience of Professor Liu Hongqi in the treatment of threatened abortion. [Conclusion]Professor Liu Hongqi's superb skills, rigorous prescription testimonies, have unique insights for the treatment of this disease, the successful experience is worthy of clinical promotion.

Guía fármacoterapeutica de amenaza de parto pretérmino / Pharmacotherapeutic guide of the risk of premature birth / Guia farmacoterapêutico do risco de parto prematuro

El parto pretérmino representa un reto terapéutico ya que su tratamiento oportuno disminuye la morbilidad y mortalidad \r\nneonatal. Afecta de 5 a 11% de todos los partos en el mundo, entre 9 y 10% en países de bajos ingresos y de 6 a 11,9% en países \r\ncon altos ingresos. Es el responsable de 70% de las muertes neonatales y 37% de las muertes en infantes así como el causante de \r\n25 a 50% de los casos de falla en el desarrollo neurológico en niños. Por lo anterior, es importante realizar un adecuado tamizaje \r\ny tratamiento de las pacientes que se encuentran en riesgo de parto pretérmino. Para ello, se realizó una guía fármacoterapeutica \r\nbasada en la mejor evidencia para su manejo.

preterm labor represents a therapeutic challenge because \r\nopportune treatment decreases neonatal morbidity and \r\nmortality. It affects 5-11% of all worldwide births. Of these \r\nbirths 9-10% occurred in low-income countries and 6-11.9% in \r\nhigh-income countries. Preterm labor is responsible for 70% \r\nof neonatal deaths and 37% of infant deaths; it causes 25-50% \r\nof the cases of neurological development failure in children. \r\nBecause of this, it is important to perform adequate screening \r\nand treatment of patients at risk for preterm delivery. A pharma\r\n-\r\nceutical guide based on the best evidence for its management \r\nwas performed.

O parto prematuro representa um desafio terapêutico, uma vez \r\nque seu tratamento oportuno diminui a morbidez e mortali\r\n-\r\ndade neonatal. Afeta de 5 a 11% de todos os partos no mundo, \r\nsendo que, entre 9 e 10% ocorrem em países de baixa renda, \r\ne de 6 a 11,9%, em países de alta renda. É responsável por 70% \r\ndas mortes neonatais e 37% das mortes em recém-nascidos, \r\nassim como é o causador de 25 a 50% dos casos de falha no \r\ndesenvolvimento neurológico em crianças. Por este motivo, \r\né importante realizar uma triagem e tratamento adequados \r\ndas pacientes que se encontram em risco de parto prematuro. \r\nPortanto, foi elaborado um guia farmacoterapêutico com base \r\nna melhor evidência para seu manuseio.

Early Versus Late ECV In Primigravidae With Breech Presentation: A Pilot Study

This was a pilot study comparing the success between early versus late external cephalic version (ECV) involving primigravidae with singleton breech pregnancy. They were randomised into early (34–36 weeks) and late (37-40 weeks) ECV groups. A total of 44 women were initially randomised into 22 women for each group. The overall ECV success rate was acceptable in both groups although insignificantly higher in the late ECV group (55.6% versus 46.7%, p= 0.732.) Caesarean section in the early ECV group was higher (80% versus 72.2%). Early ECV group had women with higher BMI (29.5 versus 26.8 kg/m2, p=0.107), anterior placentation (60% versus 38.9%) and extended breech presentation (55.6% versus 44.4%; p= 0.296). In conclusion, early ECV in primigravidae showed no better success rate than late ECV. Maternal obesity, anterior placentation and extended breech presentation should alert to failure risk.