Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 22
Filtrar
1.
J Obstet Gynaecol Can ; : 102294, 2023 Nov 20.
Artigo em Inglês | MEDLINE | ID: mdl-37993101

RESUMO

OBJECTIVES: Uterine scarring is a risk factor for placenta accreta spectrum (PAS) disorder. We aimed to determine the factors related to PAS in women who had previously undergone a cesarean. METHODS: We performed a case-control study where women who underwent postpartum hysterectomy for placenta accreta/percreta (cases) were matched to all women with a previous cesarean who delivered in the week before each case (controls). Maternal characteristics along with previous cesarean characteristics were compared between cases and controls. Univariate and multivariate logistic regression analyses were performed to determine risk factors related to PAS. RESULTS: We compared 64 cases of PAS that required hysterectomy to 192 controls. The factors related to PAS were a history of uterine surgery (OR 27.4; 95% CI 5.1-146.5, P < 0.001) and the number of previous cesareans (2 cesareans: OR 7.2; 95% CI 3.4-15.4, P < 0.001; more than 2 cesareans: OR 7.9; 95% CI 2.9-21.5, P < 0.001). In women with a single previous cesarean without previous uterine surgery, an interdelivery interval of fewer than 18 months (OR 6.3; 95% CI 1.8-22.4, P = 0.004) and smoking (OR 5.8; 95% CI 1.2-27.8, P = 0.03) were related to PAS. The gestational age and the cervical dilatation at previous cesarean were not associated with PAS (all with P > 0.05). The lack of data regarding the closure of the uterus at previous cesareans prevents us from drawing solid conclusions. CONCLUSIONS: Previous uterine surgery, the number of previous cesareans, smoking, and an interdelivery interval of fewer than 18 months after cesarean are significant risk factors for PAS requiring postpartum hysterectomy.

2.
Clin Chem Lab Med ; 61(9): 1630-1635, 2023 08 28.
Artigo em Inglês | MEDLINE | ID: mdl-36989429

RESUMO

OBJECTIVES: Placental growth factor (PlGF) is used for first-trimester preeclampsia screening and could be combined with other biochemical markers for Down syndrome screening. We aim to estimate the predictive value of the combination of pregnancy-associated plasma protein (PAPP-A), free ß-human chorionic gonadotropin (free ß-hCG), placental growth factor (PlGF) and α-fetoprotein (AFP) with and without nuchal translucency. METHODS: Singleton pregnancies recruited at 11-14 weeks and followed until delivery. The four maternal markers were measured using Kryptor (ThermoFisher-BRAHMS) and adjusted for gestational age and maternal characteristics. The risk of Down syndrome was calculated using the Fetal Medicine Foundation algorithm and multivariate linear regression analyses in all cases and in 2,200 controls. Receiver-operator characteristic (ROC) curves were used to calculate the detection and false-positive rates. RESULTS: Twenty-six (0.2%) cases of Down syndrome were diagnosed among 13,386 participants. The combination of the four biomarkers could have detected 88% (95% CI: 72-97%) of the cases at a false-positive rate of 13% (95% CI: 12-15%). The addition of nuchal translucency would have increased the detection rate to 96% (95% CI: 82-99%) at a false-positive rate of 4% (95% CI: 4-5%) using a 1:300 cut-off and to 100% (95% CI: 89-100%) at a false-positive rate of 6% (95% CI: 5-8%) using a 1:500 cut-off. CONCLUSIONS: First-trimester screening using biochemical markers allows the identification of approximately 88% of Down syndrome cases for a false-positive rate of 13%. The addition of nuchal translucency raises the detection rate above 95% with a false-positive rate below 5%.


Assuntos
Síndrome de Down , Gravidez , Humanos , Feminino , Síndrome de Down/diagnóstico , Primeiro Trimestre da Gravidez , Fator de Crescimento Placentário , Diagnóstico Pré-Natal , Proteína Plasmática A Associada à Gravidez/análise , Gonadotropina Coriônica Humana Subunidade beta , Biomarcadores , Medição da Translucência Nucal
4.
Antioxidants (Basel) ; 10(3)2021 Feb 28.
Artigo em Inglês | MEDLINE | ID: mdl-33670907

RESUMO

Solar ultraviolet A (UV-A) radiation promotes a huge variety of damages on connective tissues and dermal fibroblasts, including cellular senescence, a major contributor of skin photoaging. The mechanisms of skin photoaging evoked by UV-A partly involve the generation of reactive oxygen species and lipid peroxidation. We previously reported that 4-hydroxynonenal (HNE), a lipid peroxidation-derived aldehyde, forms adducts on elastin in the skins of UV-A irradiated hairless mice, possibly contributing to actinic elastosis. In the present study, we investigated whether and how HNE promotes fibroblast senescence in skin photoaging. Dermal fibroblasts of skins from UV-A-exposed hairless mice exhibited an increased number of γH2AX foci characteristic of cell senescence, together with an accumulation of HNE adducts partly colocalizing with the cytoskeletal protein vimentin. Murine fibroblasts exposed to UV-A radiation (two cycles of 15 J/cm2), or HNE (30 µM, 4 h), exhibited senescence patterns characterized by an increased γH2AX foci expression, an accumulation of acetylated proteins, and a decreased expression of the sirtuin SIRT1. HNE adducts were detected on vimentin in cultured fibroblasts irradiated by UV-A or incubated with HNE. The HNE scavenger carnosine prevented both vimentin modification and fibroblast senescence evoked by HNE in vitro and in the skins of UV-A-exposed mice. Altogether, these data emphasize the role of HNE and lipid peroxidation-derived aldehydes in fibroblast senescence, and confirm the protective effect of carnosine in skin photoaging.

5.
Redox Biol ; 40: 101861, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33548859

RESUMO

Preeclampsia (PE) is a multifactorial pregnancy disease, characterized by new-onset gestational hypertension with (or without) proteinuria or end-organ failure, exclusively observed in humans. It is a leading cause of maternal morbidity affecting 3-7% of pregnant women worldwide. PE pathophysiology could result from abnormal placentation due to a defective trophoblastic invasion and an impaired remodeling of uterine spiral arteries, leading to a poor adaptation of utero-placental circulation. This would be associated with hypoxia/reoxygenation phenomena, oxygen gradient fluctuations, altered antioxidant capacity, oxidative stress, and reduced nitric oxide (NO) bioavailability. This results in part from the reaction of NO with the radical anion superoxide (O2•-), which produces peroxynitrite ONOO-, a powerful pro-oxidant and inflammatory agent. Another mechanism is the progressive inhibition of the placental endothelial nitric oxide synthase (eNOS) by oxidative stress, which results in eNOS uncoupling via several events such as a depletion of the eNOS substrate L-arginine due to increased arginase activity, an oxidation of the eNOS cofactor tetrahydrobiopterin (BH4), or eNOS post-translational modifications (for instance by S-glutathionylation). The uncoupling of eNOS triggers a switch of its activity from a NO-producing enzyme to a NADPH oxidase-like system generating O2•-, thereby potentiating ROS production and oxidative stress. Moreover, in PE placentas, eNOS could be post-translationally modified by lipid peroxidation-derived aldehydes such as 4-oxononenal (ONE) a highly bioreactive agent, able to inhibit eNOS activity and NO production. This review summarizes the dysfunction of placental eNOS evoked by oxidative stress and lipid peroxidation products, and the potential consequences on PE pathogenesis.


Assuntos
Óxido Nítrico Sintase Tipo III , Pré-Eclâmpsia , Endotélio Vascular/metabolismo , Feminino , Humanos , Óxido Nítrico/metabolismo , Óxido Nítrico Sintase Tipo III/metabolismo , Estresse Oxidativo , Placenta/metabolismo , Pré-Eclâmpsia/metabolismo , Gravidez
6.
Am J Perinatol ; 38(S 01): e292-e298, 2021 08.
Artigo em Inglês | MEDLINE | ID: mdl-32446261

RESUMO

OBJECTIVE: Increased expression of soluble fms-like tyrosine kinase 1 (sFlt-1), associated with a decrease in placental growth factor (PlGF), plays a key role in the pathogenesis of preeclampsia (PE). We evaluated the prognostic value of the sFlt-1/PlGF ratio for the onset of adverse maternofetal outcomes (AMFO) in case of early-onset PE with attempted expectant management. STUDY DESIGN: From October 2016 through November 2018, all singleton pregnancies complicated by early-onset PE (before 34 weeks of gestation) were included in a cohort study. The plasma levels of sFlt-1 and PlGF were blindly measured on admission. For the statistical analysis, we performed a bivariate analysis, a comparison of the receiving operating characteristic curves and a survival analysis estimated by the Kaplan-Meier method. RESULTS: Among 109 early PE, AMFO occurred in 87 pregnancies (79.8%), mainly hemolysis, elevated liver enzymes, and low platelet count syndrome and severe fetal heart rate abnormalities requiring urgent delivery. The area under the curve (AUC) of sFlt-1/PlGF ratio was 0.82 (95% confidence interval [CI]: 0.73-0.88) for the risk of AMFO and the difference between the AUCs was significant for each separate standard parameter (p = 0.018 for initial diastolic blood pressure, p = 0.013 for alanine aminotransferase, p < 0.001 for uric acid). Pregnancies were best classified by a cutoff ratio of 293, with a sensitivity of 95% and a specificity of 50%. With a ratio value less than 293, no pregnancy was complicated or had been stopped during the first 5 days. A ratio more than 293 was associated with an increased risk of AMFO onset (hazard ratio [HR]: 3.61; 95% CI: 2.13-6.10; p < 0.001) and had a significant association with the length of time between the diagnosis of PE and delivery (HR: 2.49; 95% CI: 1.56-3.96; p < 0.001). CONCLUSION: The sFlt-1/PlGF ratio is an additional tool in the prediction of AMFO in proven early-onset PE, which is likely to improve care by anticipating severe complications. KEY POINTS: · The sFlt-1/PlGF ratio is associated with AMFO.. · It is an additional tool for physician.. · We proposed a 293 cutoff value for the ratio..


Assuntos
Fator de Crescimento Placentário/sangue , Pré-Eclâmpsia/sangue , Receptor 1 de Fatores de Crescimento do Endotélio Vascular/sangue , Adolescente , Adulto , Biomarcadores/sangue , Feminino , Humanos , Estimativa de Kaplan-Meier , Pré-Eclâmpsia/epidemiologia , Valor Preditivo dos Testes , Gravidez , Curva ROC , Estudos Retrospectivos , Fatores de Tempo , Adulto Jovem
7.
Am J Perinatol ; 38(12): 1303-1307, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-32521559

RESUMO

OBJECTIVE: This study was aimed to estimate the value of transabdominal (TA) ultrasound measurement of cervical length (CL), as an alternative of transvaginal (TV) ultrasound, for universal screening of short cervix in the midtrimester. STUDY DESIGN: We conducted a prospective cohort study of nulliparous women with singleton pregnancy at 20 to 24 weeks of gestation. All participants underwent TA ultrasound followed by TV ultrasound with acquisitions of images and videos of the uterine cervix. A second sonographer, blinded to the participants' data and pregnancy outcomes, measured the CL using TA and TV images and videos. Pearson's correlation test and receiver operating characteristic (ROC) curve analyses were performed. RESULTS: A total of 805 participants were recruited, including 780 (97%) where TA CL measurement was feasible. We observed a strong correlation of CL between TA and TV (correlation coefficient: 0.57; p < 0.0001) with a mean TA measurement being 4 mm (95% confidence interval [CI]: -6 to 14 mm) below the mean TV measurement (mean of differences: 5 ± 4 mm). We observed that a TA CL <30 mm was highly predictive of a short cervix defined as a TV CL ≤25 mm (area under the ROC curve: 0.97; 95% CI: 0.95-0.99; p < 0.0001) with a sensitivity of 100% and a false-positive rate of 22%. CONCLUSION: Universal short cervix screening in nulliparous women could be performed using TA ultrasound, which could allow the avoidance of TV ultrasound in more than three quarter of women. In low-risk population, TV ultrasound could be reserved to women with TA CL <30 mm. KEY POINTS: · Cervical length (CL) measurement with transabdominal (TA) ultrasound is feasible in most cases and is strongly correlated with CL measured with transvaginal (TV) ultrasound.. · Using a cut-off of 30 mm for TA ultrasound as a first-step screening of short cervix in nulliparous women, three-quarter of TV ultrasound could have been avoided.. · Use of TA CL screening could alleviate some of the logistical challenges of universal TV CL screening..


Assuntos
Medida do Comprimento Cervical/métodos , Colo do Útero/diagnóstico por imagem , Adulto , Colo do Útero/anatomia & histologia , Feminino , Humanos , Paridade , Gravidez , Segundo Trimestre da Gravidez , Estudos Prospectivos , Curva ROC , Ultrassonografia Pré-Natal/métodos
8.
J Gynecol Obstet Hum Reprod ; 50(3): 101939, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33049363

RESUMO

OBJECTIVES: To evaluate patients' satisfaction and evolution of pre-operative symptoms at 6 months following laparoscopic cornuectomy for hysteroscopic sterilization implants removal. MATERIAL AND METHODS: Retrospective study including all patients undergoing laparoscopic cornuectomy for implants removal in a tertiary care setting from January 2017 to October 2018. All women suffered from persistent and treatment-resistant gynecologic and non-gynecologic complaints since sterilization procedure. Patents' satisfaction was evaluated with the PGI-I questionnaire at 2 and 6 months following surgery. RESULTS: Overall, 104 patients were enrolled. Main symptoms comprised asthenia (n = 80), chronic pelvic pain (n = 80), arthralgia (n = 70), abnormal uterine bleeding (n = 42) and headache (n = 40). Cornuectomy was feasible in all cases and led to complete devices removal in 101 women. Mean length of stay was 1.8 days, while outpatient management was feasible in 45.2 % of cases. One grade 3 complication occurred along the study period (hemoperitoneum requiring reoperation). Surgery was associated with a significant decrease in symptom occurrence, except for alopecia and weight loss. Patients' satisfaction was high: 91 % at 2 months and 97.6 % at 6 months reported an improvement in their health status compared to baseline situation. Satisfaction regarding each symptom was consistent with overall assessment, with most patients reporting significant improvement at both 2 and 6 months. CONCLUSION: Laparoscopic cornuectomy is feasible and associated with high mid-term satisfaction in patients suffering from adverse effects attributed to hysteroscopic sterilization implants.


Assuntos
Histerectomia/métodos , Laparoscopia/métodos , Satisfação do Paciente , Esterilização Tubária/efeitos adversos , Esterilização Tubária/instrumentação , Útero/cirurgia , Adulto , Artralgia/etiologia , Artralgia/cirurgia , Astenia/etiologia , Astenia/cirurgia , Feminino , Humanos , Histeroscopia , Pessoa de Meia-Idade , Dor Pélvica/etiologia , Dor Pélvica/cirurgia , Estudos Retrospectivos , Esterilização Tubária/métodos
9.
J Gynecol Obstet Hum Reprod ; 50(1): 101942, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33049364

RESUMO

OBJECTIVES: To determine whether the surgical learning curve impact the spontaneous pregnancy rate in infertile patients undergoing removal of deep infiltrating endometriosis MATERIAL AND METHODS: Single center retrospective study including the first 50 consecutive infertile women suffering from deep infiltrating endometriosis and referred to a single surgeon. All patients underwent laparoscopic removal of deep endometriosis lesions. The study population was stratified in two subgroups, namely the early group (including the first 25 cases) and the late group (comprising the 25 subsequent cases). Pregnancy and live birth rates, surgical morbidity and clinical recurrence rate were compared between study groups. RESULTS: Overall, spontaneous pregnancy rate (40 % in the early group versus 56 % in the late group, p = 0.25), live birth rate (40 % versus 44 %, p = 0.77) and clinical recurrence rate (16 % versus 4%, p = 0.16) did not significantly differ between the study groups. Logistic regression analysis revealed that ASRM stage, EFI score, and body mass index were the only significant prognostic factors of postoperative spontaneous fertility. CONCLUSION: Surgical resection of deep infiltrating endometriosis in infertile women is associated with high spontaneous pregnancy and live birth rates. The surgeon's learning curve does not impact postoperative fertility outcomes.


Assuntos
Endometriose/cirurgia , Infertilidade Feminina/etiologia , Curva de Aprendizado , Taxa de Gravidez , Cirurgiões , Adolescente , Adulto , Índice de Massa Corporal , Feminino , Humanos , Laparoscopia , Nascido Vivo , Gravidez , Prognóstico , Estudos Retrospectivos , Adulto Jovem
10.
Am J Obstet Gynecol ; 224(2): 204.e1-204.e7, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-32777265

RESUMO

BACKGROUND: The Fetal Medicine Foundation proposed a competing risks model for early identification of women at a high risk of preterm preeclampsia, typically associated with deep placentation disorders. The Great Obstetrical Syndromes include a spectrum of pregnancy complications (preeclampsia, intrauterine growth restriction, preterm birth, late spontaneous abortion, and abruptio placentae) that are also associated with deep placentation disorders. OBJECTIVE: This study aimed to estimate the rate of placenta-mediated pregnancy complications in nulliparous women with a positive first-trimester Fetal Medicine Foundation preterm preeclampsia screening test. STUDY DESIGN: We conducted a prospective cohort study of nulliparous women recruited at 11 to 14 weeks of gestation. Maternal characteristics, mean arterial blood pressure, levels of maternal serum biomarkers (pregnancy-associated plasma protein-A, placental growth factor, and soluble fms-like tyrosine kinase-1), and mean uterine artery pulsatility index were obtained to calculate the risk of preterm preeclampsia according to the Fetal Medicine Foundation algorithm. The predicted risks were dichotomized as a positive or negative test according to 2 risk cutoffs (1 in 70 and 1 in 100). The detection rate, false-positive rate, and positive and negative predictive values were calculated for placenta-mediated complications, including preeclampsia, small for gestational age (birthweight <10th percentile), fetal death, preterm birth, and a composite outcome, including any of the foregoing. The same analyses were computed for a composite of severe outcomes, including preterm preeclampsia, severe small for gestational age (less than third percentile), and fetal death. RESULTS: We included 4575 participants with complete observations, of whom 494 (10.8%) had an estimated risk of preterm preeclampsia of ≥1 in 70 and 728 (15.9%) had a risk of ≥1 in 100. The test based on a risk cutoff of 1 in 70 could have correctly predicted up to 27% of preeclampsia, 55% of preterm preeclampsia, 18% of small for gestational age, 24% of severe small for gestational age, and 37% of fetal deaths at a 10% false-positive rate. The test based on a cutoff of 1 in 100 could have predicted correctly up to 35% of preeclampsia, 69% of preterm preeclampsia, 25% of small for gestational age, 30% of severe small for gestational age, and 53% of fetal deaths at a 15% false-positive rate. The positive predictive value of a screening test for preterm preeclampsia of ≥1 in 70 was 3% for preterm preeclampsia, 32% for the composite outcome, and 9% for the severe composite outcome. CONCLUSION: Nulliparous women with a first-trimester positive preterm preeclampsia Fetal Medicine Foundation screening test are at a higher risk of both preterm preeclampsia and other severe placenta-mediated pregnancy complications. Approximately 1 woman of 10 identified as high risk by the Fetal Medicine Foundation algorithm developed at least 1 severe placenta-mediated pregnancy complication.


Assuntos
Pressão Arterial , Morte Fetal , Retardo do Crescimento Fetal/epidemiologia , Paridade , Pré-Eclâmpsia/epidemiologia , Resultado da Gravidez/epidemiologia , Nascimento Prematuro/epidemiologia , Artéria Uterina/fisiopatologia , Adulto , Canadá/epidemiologia , Estudos de Coortes , Feminino , Idade Gestacional , Humanos , Recém-Nascido , Recém-Nascido Pequeno para a Idade Gestacional , Programas de Rastreamento , Fator de Crescimento Placentário/metabolismo , Pré-Eclâmpsia/metabolismo , Gravidez , Primeiro Trimestre da Gravidez , Proteína Plasmática A Associada à Gravidez/metabolismo , Fluxo Pulsátil , Medição de Risco , Índice de Gravidade de Doença , Ultrassonografia Pré-Natal , Artéria Uterina/diagnóstico por imagem , Receptor 1 de Fatores de Crescimento do Endotélio Vascular/metabolismo
12.
J Obstet Gynaecol Can ; 42(10): 1235-1242, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32718871

RESUMO

OBJECTIVE: Preeclampsia is associated with a higher maternal blood levels of soluble fms-like tyrosine kinase-1 (sFlt-1) and lower levels of placental growth factor (PlGF) that appear before clinical onset. We aimed to estimate the normal progression of these biomarkers in normal pregnancies and in those affected by preeclampsia. METHODS: We conducted a case-cohort study including low-risk nulliparous women recruited at 11-13 weeks gestation (cohort) and women with preeclampsia (cases). Maternal blood was collected at different points during pregnancy including at the time of diagnosis of preeclampsia for cases. Maternal serum PlGF and sFlt-1 concentrations and the sFlt-1/PlGF ratio were measured using B•R•A•H•M•S plus KRYPTOR automated assays and were compared between patients in both groups matched for gestational age. Cases were stratified as early- (≤34 weeks), intermediate- (35-37 weeks) and late-onset (>37 weeks) preeclampsia. RESULTS: The cohort consisted of 45 women whose results were compared with those of 31 women who developed preeclampsia, diagnosed at a median gestational age of 32 weeks (range 25-38 weeks). We observed that sFlt-1, PlGF and their ratio fluctuated during pregnancy in both groups, with a significant correlation with gestational age after 28 weeks (P < 0.05). We observed a significant difference between cases and controls, with a median ratio 100 times higher in early preeclampsia (P < 0.001), 13 times higher in intermediate preeclampsia (P < 0.001), but no significant difference between groups in late-onset preeclampsia with matched controls. CONCLUSION: PlGF, sFlt-1, and their ratio may be useful in the prediction and diagnosis of early- and intermediate-onset preeclampsia but are not useful for late-onset preeclampsia.


Assuntos
Fator de Crescimento Placentário/sangue , Pré-Eclâmpsia/diagnóstico , Receptor 1 de Fatores de Crescimento do Endotélio Vascular/sangue , Adulto , Biomarcadores/sangue , Estudos de Casos e Controles , Estudos de Coortes , Feminino , Humanos , Recém-Nascido , Gravidez
13.
J Gynecol Obstet Hum Reprod ; 49(8): 101829, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32534217

RESUMO

INTRODUCTION: Recent discoveries have shed light on the benefits of opportunistic salpingectomy in the prevention of ovarian cancer. However, in this time of increasing interest in the parameters of ovarian reserve, there are no national recommendations on the subject. This literature review provides an enlightened look at the rationale for performing an opportunistic salpingectomy. OBJECTIVES: To evaluate the benefits and risks associated with opportunistic salpingectomy during surgery for a benign gynecological condition. MATERIAL AND METHODS: We carried out a systematic review of the literature using the Pubmed/Medline search engine and the Cochrane database. RESULTS: A total of 61 articles were selected from over 300 references. The protective impact against cancer, which is widely demonstrated in the literature, is proof of the benefit of this procedure. Furthermore, no increase in intraoperative morbidity has been noted. However, the clinical impact on the ovarian reserve remains uncertain (in particular the occurrence of early pre-menopausal symptoms during the perimenopausal period). Nonetheless, the socioeconomic analysis supports performing opportunistic salpingectomy. CONCLUSION: Performing opportunistic salpingectomy does not appear to cause an increase in morbidity but the impact on ovarian function is uncertain. The fact that there is a proven benefit of such a procedure against cancer indicates that prior to any surgery a clear discussion should be held with the patient in which they should be fully informed.


Assuntos
Procedimentos Cirúrgicos em Ginecologia/métodos , Neoplasias Ovarianas/prevenção & controle , Salpingectomia , Adulto , Carcinoma Epitelial do Ovário/etiologia , Carcinoma Epitelial do Ovário/prevenção & controle , Feminino , Humanos , Complicações Intraoperatórias , Menopausa Precoce , Neoplasias Ovarianas/etiologia , Reserva Ovariana/fisiologia , Fatores de Risco , Salpingectomia/efeitos adversos , Salpingectomia/métodos , Resultado do Tratamento
14.
Prenat Diagn ; 40(5): 519-527, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-31955436

RESUMO

For the past decades, growing attention has been given to aspirin use during pregnancy. It favors placentation by its proangiogenic, antithrombotic, and anti-inflammatory effects. Therefore, low doses of aspirin are prescribed in the prevention of placenta-mediated complications, mainly preeclampsia and fetal growth restriction. However, questions regarding its clinical application are still debated. Aspirin is effective in preventing preeclampsia in a high-risk population. Most guidelines recommend that risk stratification should rely on medical history. Nevertheless, screening performances dramatically improve if biochemical and biophysical markers are included. Concerning the appropriate timing and dose, latest studies suggest aspirin should be started before 16 weeks of pregnancy and at a daily dose of 100 mg or more. Further studies are needed to improve the identification of patients likely to benefit from prophylactic aspirin. Besides, the role of aspirin in the prevention of fetal growth restriction is still questioned.


Assuntos
Aspirina/uso terapêutico , Retardo do Crescimento Fetal/prevenção & controle , Inibidores da Agregação Plaquetária/uso terapêutico , Pré-Eclâmpsia/prevenção & controle , Indutores da Angiogênese , Anticoagulantes/uso terapêutico , Feminino , Idade Gestacional , Heparina de Baixo Peso Molecular/uso terapêutico , Humanos , Seleção de Pacientes , Guias de Prática Clínica como Assunto , Gravidez , Medição de Risco , Fatores de Tempo
15.
Arch Gynecol Obstet ; 301(1): 229-234, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-31781886

RESUMO

OBJECTIVE: To evaluate the use of new bipolar vessel sealing system like LigaSure™ compared to the standard surgical technique (suture) during emergency peripartum hysterectomy (EPH). METHODS: A retrospective observational bicentric study was conducted from February 2005 to August 2018 in the maternity wards of the University Hospital of Toulouse and Angers. All EPHs performed up to 24 h after delivery were included. The main outcome was the total blood loss. Secondary outcomes were operating time, number of blood transfusions, per and postoperative complications. A subgroup analysis was performed between hysterectomies performed in emergency and scheduled hysterectomies. RESULTS: Among 111,266 deliveries, 86 women (0.07%) underwent EPH, 29 were operated upon with LigaSure™, 57 with the traditional technique. In the LigaSure™ arm, there were statistically lower blood loss (3198 mL vs 4223 mL, p = 0.02), fewer blood transfusions (62.1% vs 94.7%, p = 0.0003, confirmed in subgroup analysis), and fewer perioperative complications (8.3% vs 45.5%, p = 0.04) for scheduled hysterectomies. CONCLUSION: Bipolar vessel sealing systems such as LigaSure™ are a surgical instrument, easy to use for the surgeon, with an interest in the management of EPH, particularly for total blood loss, transfusions, and intraoperative complications.


Assuntos
Histerectomia/métodos , Período Perioperatório/métodos , Período Periparto/fisiologia , Adulto , Feminino , Humanos , Gravidez , Estudos Retrospectivos , Adulto Jovem
18.
Redox Biol ; 22: 101126, 2019 04.
Artigo em Inglês | MEDLINE | ID: mdl-30738311

RESUMO

Decreased nitric oxide (NO) bioavailability plays a critical role in the pathophysiology of preeclampsia (PE). Recent evidence indicates that S-glutathionylation may occur on the endothelial nitric oxide synthase (eNOS), leading to eNOS uncoupling, characterized by a decreased NO production and an increased generation of superoxide anion (O2•-). We hypothesized that eNOS glutathionylation may occur in PE placentas and participate in eNOS dysfunction. The glutathionylation of eNOS was investigated in thirteen PE-affected patients and in nine normal pregnancies. Immunofluorescence, confocal microscopy and western-blot experiments carried out on eNOS immunoprecipitates, revealed a high level of eNOS glutathionylation in PE placentas, mostly reversed by dithiotreitol (DTT), thus indicative of S-glutathionylation. In order to investigate whether eNOS glutathionylation may alter trophoblast migration, an important event occurring during early placentation, cultured HTR-8/SVneo human trophoblasts (HTR8) were exposed either to low pO2 (O2 1%) or to pO2 changes (O2 1-20%), in order to generate oxidative stress. Trophoblasts exposed to low pO2, did not undergo oxidative stress nor eNOS S-glutathionylation, and were able to generate NO and migrate in a wound closure model. In contrast, trophoblasts submitted to low/high pO2 changes, exhibited oxidative stress and a (DTT reversible) S-glutathionylation of eNOS, associated with reduced NO production and migration. The autonomous production of NO seemed necessary for the migratory potential of HTR8, as suggested by the inhibitory effect of eNOS silencing by small interfering RNAs, and the eNOS inhibitor L-NAME, in low pO2 conditions. Finally, the addition of the NO donor, NOC-18 (5 µM), restored in part the migration of HTR8, thereby emphasizing the role of NO in trophoblast homeostasis. In conclusion, the high level of eNOS S-glutathionylation in PE placentas provides new insights in the mechanism of eNOS dysfunction in this disease.


Assuntos
Glutationa/metabolismo , Óxido Nítrico Sintase Tipo III/metabolismo , Placenta/metabolismo , Pré-Eclâmpsia/etiologia , Pré-Eclâmpsia/metabolismo , Adulto , Estudos de Casos e Controles , Linhagem Celular , Suscetibilidade a Doenças , Endotélio Vascular/metabolismo , Feminino , Imunofluorescência , Humanos , Óxido Nítrico/metabolismo , Oxirredução , Estresse Oxidativo , Pré-Eclâmpsia/diagnóstico , Pré-Eclâmpsia/fisiopatologia , Gravidez , Espécies Reativas de Oxigênio/metabolismo , Trofoblastos/metabolismo
19.
Arch Gynecol Obstet ; 299(3): 741-745, 2019 03.
Artigo em Inglês | MEDLINE | ID: mdl-30737586

RESUMO

INTRODUCTION: We aimed to assess the prognostic significance of early ßhCG change and baseline progesterone level on treatment outcome among women receiving single dose Methotrexate protocol for tubal ectopic pregnancy (EP). MATERIAL AND METHODS: Retrospective study involving all consecutive patients diagnosed with EP and receiving Methotrexate therapy form January 2015 to December 2016. Patients were stratified into 2 groups according to treatment outcome: success group (n = 66) involved women who displayed complete resolution of serum ßhCG levels following a single course of Methotrexate; failure group (n = 55) included patients who required repeated Methotrexate administration and/or surgical management. Predictive performances of baseline progesterone and ratio"ßhCG level on day 4/ ßhCG level on day 1″ (d4/d1) on treatment outcome were assessed using Receiving Operating Characteristics curves. RESULTS: The ratio d4/d1 displayed good performances in predicting treatment outcome (AUC = 0.826). A ratio ≤ 0.7 was associated with a success rate of 94% after 1 course of Methotrexate and 100% after 2 courses. In contrast, a ratio >1.7 was associated with a failure rate of 100%. Conversely, baseline progesterone showed poor performances (AUC = 0.611). CONCLUSIONS: Patients with extreme ßhCG changes (n = 33) on day 4 might benefit from a more personalized approach: simplified monitoring in those with a decline ≥30%, anticipated second course of treatment in those with an increase > 70%.


Assuntos
Gonadotropina Coriônica Humana Subunidade beta/metabolismo , Metotrexato/uso terapêutico , Gravidez Ectópica/tratamento farmacológico , Progesterona/metabolismo , Adolescente , Adulto , Feminino , Humanos , Metotrexato/farmacologia , Gravidez , Prognóstico , Estudos Retrospectivos , Resultado do Tratamento , Adulto Jovem
20.
Arch Gynecol Obstet ; 297(6): 1465-1472, 2018 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-29546565

RESUMO

PURPOSE: To compare mid-term anatomical and functional outcomes following laparoscopic sacrocolpopexy (LS) between women under and over 65. METHODS: Prospective and observational study involving patients with symptomatic pelvic organ prolapse (POP) undergoing LS. Study population was stratified according to patients' age at the time of surgery. POP symptoms and impact on quality of life were assessed by PFIQ-7 and PFDI-20 questionnaires at baseline and during follow-up. RESULTS: Among our study population (n = 72), 26 women were over 65 and 46 under 65. Mean follow-up duration was 17.6 months, and complete follow-up was available in 90% of patients. No differences between study groups were observed regarding surgery duration, length of stay, and peri-operative complications. Recurrence rate was 1.4% at 18 months of follow-up. Questionnaires analysis revealed a significant improvement in PFIQ-7 and PFDI-20 scores. We found no differences in post-operative scores between control and elderly groups. Sixteen patients experienced de novo stress urinary incontinence (22.2%), with no difference between groups (p = 0.7). Among them, seven required surgical management. CONCLUSIONS: LS was associated with high anatomical success rate and good functional outcomes, regardless of age at the time of surgery. LS should thus be considered in women over 65. Beyond age, the route of surgery should be driven by patient's choice and medical condition.


Assuntos
Prolapso de Órgão Pélvico/cirurgia , Idoso , Feminino , Procedimentos Cirúrgicos em Ginecologia/métodos , Humanos , Laparoscopia/métodos , Pessoa de Meia-Idade , Período Pós-Operatório , Estudos Prospectivos , Qualidade de Vida , Telas Cirúrgicas , Inquéritos e Questionários , Resultado do Tratamento , Incontinência Urinária por Estresse/cirurgia
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA