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1.
Reprod Biomed Online ; 46(5): 819-825, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-36907754

RESUMO

By considering the reasons behind discontinuing assisted reproductive technology (ART) treatment, several studies have indicated that 'stress' is an important issue, but the prevalence of stressors and stress responses, either acute or chronic, remains unclear. In this systematic review, we evaluated the characteristics, prevalence and causes of what was perceived and reported as 'stress' by couples who discontinued ART treatment. Electronic databases were systematically searched, and studies were considered eligible if they evaluated stress as a possible reason for ART discontinuation. Twelve studies were included, with 15,264 participants from eight countries. In all studies, 'stress' was assessed through generic questionnaires or medical records, not by validated stress questionnaires or biomarkers. The prevalence of 'stress' ranged from 11-53%. When the results were pooled, 'stress' was cited as a reason for ART discontinuation by 775 out of 2507 participants (30.9%). Clinical factors associated with worse prognosis, physical discomfort due to treatment procedures, family demands, time pressure and economic burden were identified as sources of 'stress' that contributed to ART discontinuation. Precisely knowing the characteristics of the stress associated with infertility is essential to devise preventive or supportive interventions to help patients to cope and endure the treatments. Further studies are necessary to investigate whether the mitigation of stress factors can reduce ART discontinuation rates.


Assuntos
Infertilidade , Técnicas de Reprodução Assistida , Humanos , Prevalência , Infertilidade/terapia , Prognóstico
3.
Femina ; 45(1): 56-62, mar. 2017. ilus, tab
Artigo em Português | LILACS | ID: biblio-1050705

RESUMO

O Food and Drug Administration (FDA) fez um alerta de segurança em relação ao risco potencial de disseminação de neoplasias malignas pelo uso do morcelador elétrico durante procedimentos minimamente invasivos. Esse artigo visa avaliar as evidências científicas sobre morcelamento uterino em relação ao risco de disseminação de câncer, sendo abordados a incidência de sarcoma uterino entre as mulheres previamente diagnosticadas com doença uterina benigna aparente, a possibilidade de avaliação pré-operatória desse risco, o posicionamento das principais sociedades médicas em relação à utilização do morcelador elétrico e as repercussões na prática clínica após as recomendações do FDA.(AU)


The US Food and Drug Administration (FDA) released a safety communication advising the potential risk of inadvertent spread of cancer cellsafter the use of electrical morcellator in minimally invasive procedures. This article aims to evaluate the scientific evidence regarding the risk of spread of cancer after uterine morcellation, the incidence of uterine sarcoma among women diagnosed with benign uterine disease, the possibility of preoperative assessment of this risk, the main medical societies positions statements regarding theuse of electric morcellation and the FDA recommendation`s impact on clinical practice. A review of the literature and a research of the main medical societies positions statements regarding the use of electric morcellation in minimally invasive surgeries were done.(AU)


Assuntos
Humanos , Feminino , Sarcoma/cirurgia , Neoplasias do Colo do Útero/complicações , Morcelação/efeitos adversos , Morcelação/instrumentação , Leiomioma/cirurgia , United States Food and Drug Administration , Risco
4.
Tumori ; 103(1): 81-86, 2017 Jan 21.
Artigo em Inglês | MEDLINE | ID: mdl-28009429

RESUMO

INTRODUCTION: The immune system plays a critical role in the defense against human papillomavirus (HPV) infection and its persistence. Toll-like receptors (TLRs) are membrane receptors responsible for activation of the innate immune response, and an association between TLR expression and uterine cervical cancer has been shown. Tumor necrosis factors (TNFs) are among the main mediators of skin and mucosa inflammation. The aim of this study was to demonstrate the association between TLR and TNF immune expression and cervical cancer and premalignant cervical lesions. METHODS: A total of 64 embedded tissues were obtained from gynecological procedures, including 35 specimens with cervical intraepithelial neoplasia (CIN) and 10 specimens with cervical squamous cell carcinoma (CSCC) as well as 19 normal cervical samples. The expression of TLR2, TLR3, TLR4, TNF-α and TNF-ß was measured by immunohistochemistry and graded into low and high levels of expression. RESULTS: There was an association between the expression levels of TLR2 and those of TNF-α and TNF-ß (p = 0.01 and p = 0.021, respectively) in the cervical cancer and CIN groups. TLR4 expression was associated with TNF-α and TNF-ß expression (p = 0.016 and p = 0.025, respectively) in these 2 groups. By contrast, TLR3 was not statistically associated with TNF-α or TNF-ß in any of the groups. CONCLUSIONS: There might be an association of the TLR2 and TLR4 pathways with the immunological response of TNF-α and TNF-ß in cervical cancer. These markers are also expressed at higher levels in cervical cancer and premalignant lesions compared to normal controls.


Assuntos
Receptores Toll-Like/metabolismo , Fator de Necrose Tumoral alfa/metabolismo , Neoplasias do Colo do Útero/metabolismo , Feminino , Humanos , Neoplasias do Colo do Útero/imunologia
5.
Femina ; 44(4): 265-269, dez. 30, 2016. tab
Artigo em Português | LILACS | ID: biblio-1050873

RESUMO

Atualmente é crescente o número de mulheres atingidas por doenças como Hipertensão Arterial Sistêmica (HAS), Diabetes, Osteoporose e mesmo cânceres, como os de mama e cólon. O médico ginecologista, muitas vezes, é a única referência de saúde destas pacientes. Este artigo visa reunir as recomendações das principais Sociedades Médicas no que diz respeito ao rastreio das comorbidades citadas e os demais cuidados básicos de saúde da mulher. Ele objetiva, portanto, facilitar e ampliar a abordagem prática do ginecologista no consultório para que a mulher seja avaliada de uma maneira mais completa.(AU)


The number of women suffering from diseases such as Systemic Arterial Hypertension, Diabetes, Osteoporosis and breast and colon cancers has grown in the latest decades. The gynecologist is oftenly the only reference in medical care for these women. This article groups the main recommendations from different Medical Societies regarding the tracking of these conditions and other basic aspects on women's health care. It aims to facilitate and broaden the gynecologists' practical approach in evaluating women in a more complete way.(AU)


Assuntos
Humanos , Feminino , Saúde da Mulher , Cuidados Médicos , Atenção à Saúde , Testes Diagnósticos de Rotina , Ginecologia/métodos , Osteoporose/diagnóstico por imagem , Encaminhamento e Consulta , Doenças da Glândula Tireoide/diagnóstico , Infecções Bacterianas/prevenção & controle , Bacteriúria/diagnóstico , Infecções Urinárias/diagnóstico , Deficiência de Vitamina D/diagnóstico , Viroses/prevenção & controle , Infecções por Chlamydia/diagnóstico , Colesterol/análise , Vacinação , Neoplasias do Colo/diagnóstico , Diabetes Mellitus/diagnóstico , Monitorização Fisiológica
6.
Obstet Gynecol Int ; 2016: 6870679, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27648073

RESUMO

Background. Heavy menstrual bleeding (HMB) is a common gynecological complaint affecting quality of life. Objectives. To assess knowledge on diagnosis and treatments of HMB of Latin American (LA) obstetricians and gynecologists (OBGYNs). Methods. A survey was conducted during a scientific meeting, organized to provide updated information on topics of reproductive medicine to OBGYNs from 12 LA countries who were invited to respond to a multiple-choice questionnaire. Results. Of the 210 OBGYNs participating in the survey, from 169 (80.4%) to 203 (96.7%) answered the questions. Most respondents (80%) gave accurate answers regarding the amount of blood loss which defines HMB, underreported the proportion of women who consulted due to HMB, and were aware that the use of combined oral contraceptives (COCs) with ethynyl estradiol is not an adequate treatment in women with HMB. Female OBGYNs and those who worked in the private sector were more prone to report a higher possibility of improvement of HMB with a COC that contained estradiol valerate and dienogest or with a levonorgestrel-releasing intrauterine system. Conclusions. In general, the respondents were aware of the importance of HMB in gynecological practice and of the new medical treatments and underreported the proportion of women who consulted due to HMB.

7.
Tumori ; 102(5): 488-495, 2016 Oct 13.
Artigo em Inglês | MEDLINE | ID: mdl-27514311

RESUMO

PURPOSE: To evaluate the concordance among the available histologic classifications for endometrial adenocarcinoma using interobserver and intraobserver agreement as well as the association of tumor histologic degree in the above mentioned classifications with cellular proliferation measured by Ki-67. METHODS: Seventy women who underwent surgical treatment of endometrial adenocarcinoma with histologic confirmation of endometrioid type were included in the study. Two experienced pathologists randomly analyzed the slides in 3 distinct timeframes with a maximum of 25 slides/timeframe. Tumor slides were classified according to the degree of differentiation using 4 different classifications: International Federation of Gynecology and Obstetrics (FIGO), modified FIGO, Lax, and Alkushi. RESULTS: Intraobserver agreement was reasonable for classification of FIGO (k 0.469 and 0.538), very good for modified FIGO (k 0.661 and 0.768), moderate for Lax classification (k 0.496 and 0.466), and moderate/good for Alkushi classification (k 0.528 and 0.736). Interobserver concordance was regular for FIGO classification (k = 0.271 and 0.343), good/moderate for modified FIGO classification (k = 0.661 and 0.522, respectively), regular/moderate for Lax classification (k = 0.258 and 0.465, respectively), and regular for Alkushi classification (k = 0.283 and 0.402). CONCLUSIONS: The prognostic value of histologic grading in endometrial carcinoma and its importance for a successful therapeutic plan have been documented repeatedly, but the best grading system, in terms of prognostication, reproducibility, ease of use, and universality (e.g., applicability to all tumor cell types), has not been unequivocally defined.


Assuntos
Adenocarcinoma/diagnóstico , Neoplasias do Endométrio/diagnóstico , Adenocarcinoma/cirurgia , Neoplasias do Endométrio/cirurgia , Feminino , Humanos , Imuno-Histoquímica/métodos , Gradação de Tumores/métodos , Estadiamento de Neoplasias , Variações Dependentes do Observador , Reprodutibilidade dos Testes
8.
JBRA Assist Reprod ; 19(1): 24-8, 2015 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-27205863

RESUMO

Since the beginning of in vitro fertilization (IVF) 36 years ago, scientists have studied and critically analyzed the techniques in order to find ways to improve outcomes. However, success rates vary significantly among clinics due to poor reproducibility and inconsistency across operators. Much research has been conducted on the chemical environment, or culture medium, surrounding the oocyte/ embryo, but little attention has been given to the actual equipment and physical culture environment, which has changed very little over the years. The aim of this paper was to evaluate how the physical factors are important regulators of oocyte and embryo function and to improve understanding of the physical forces involved in the processes in human reproduction. A review the available literature was conducted using PubMed from 1966 through July 2014 in an attempt to help integrate mechanics into our understanding of the molecular basis of IVF. Keywords included in vitro fertilization, biomechanics, bioengineering, oocyte and embryo. The mechanical characterization of oocytes and embryos represents an opportunity to detect cellular defects, assess quality and bio-viability of processes such as cryopreservation as well as select the best embryo for transfer. Defining the mechanical forces at play during embryo transfer is also an important step towards improving results in in vitro fertilization. The further analysis of these phenomena needs a detailed monitoring of the mechanical conditions and more extensive studies of events on the cellular and molecular levels.

9.
Int J Gynecol Cancer ; 24(4): 794-9, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-24651629

RESUMO

OBJECTIVE: The objective of this study was to compare the quality of life (QOL) and mental health (MH) of women surviving at least 2 years after treatment for invasive carcinoma of the cervix by radical hysterectomy (RH), chemotherapy and/or radiotherapy, or by surgery followed by adjuvant therapy (RH + chemotherapy and/or radiotherapy). The QOL/MH of a control group of women with no history of malignancy was also assessed for comparison with the treated groups. METHODS: The levels of QOL and MH were assessed in 114 Brazilian women (57 patients with an average of 4 years since treatment completion and 57 control subjects). The 36-item Medical Outcomes Study Short-Form Health Survey, the State-Trait Anxiety Inventory, the 12-item General Health Questionnaire, the Life Events Inventory, and a general survey for the assessment of sociodemographic data were applied to each participant of the study. RESULTS: No differences were noted among the 3 treatment groups or between these and the control group concerning the levels of QOL (either physical or MH aspects), anxiety, general health, or life events. However, lower levels of anxiety were detected in cancer survivors when compared with the control group (P = 0.035). CONCLUSIONS: After at least 2 years, the QOL and the MH of Brazilian women treated for invasive carcinoma of the cervix were similar to those of women without malignancy and were not affected by the modality of treatment.


Assuntos
Colo do Útero/patologia , Qualidade de Vida , Neoplasias do Colo do Útero/psicologia , Neoplasias do Colo do Útero/terapia , Ansiedade , Brasil , Estudos de Casos e Controles , Terapia Combinada , Depressão , Feminino , Seguimentos , Nível de Saúde , Humanos , Histerectomia , Saúde Mental , Pessoa de Meia-Idade , Invasividade Neoplásica , Estadiamento de Neoplasias , Prognóstico , Inquéritos e Questionários , Sobreviventes , Neoplasias do Colo do Útero/patologia
10.
Int Braz J Urol ; 39(1): 46-54, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23489516

RESUMO

AIMS: Describe the impact of surgery, radiotherapy and chemoradiation in the pelvic floor functions in cervical cancer patients. MATERIALS AND METHODS: A prospective study with women submitted to radical hysterectomy (RH) (n = 20), exclusive radiotherapy (RT) (n = 20) or chemoradiation (CT/RT) (n = 20) for invasive cervical cancer. Urinary, intestinal and sexual function, as well as vaginal length and pelvic floor muscle contraction were evaluated. Comparisons between groups were performed by Kruskal-Wallis and Chi-square tests (p < 0.05). RESULTS: The groups were similar in stress urinary incontinence incidence (p = 0.56), urinary urgency (p = 0.44), urge incontinence (p = 0.54), nocturia (p = 0.53), incomplete bowel emptying (p = 0.76), bowel urgency (p = 0.12) and soilage (p = 0.43). The CT/RT group presented a higher urinary frequency (p < 0.001) and diarrhea (p = 0.025). Patients in the RH group were more sexually active (p = 0.01) and experienced less dyspareunia (p = 0.021). Vaginal length was shorter in RT group (5.5 ± 1.9 cm) and CT/RT(5.3 ± 1.5 cm) than in the RH group (7.4 ± 1.1 cm) (p < 0.001). Pelvic floor muscle contraction was similar (p = 0.302). CONCLUSIONS: RT and CT/RT treatment for cervical carcinoma are more associated to sexual and intestinal dysfunctions.


Assuntos
Carcinoma/terapia , Diafragma da Pelve/fisiopatologia , Neoplasias do Colo do Útero/terapia , Adulto , Quimiorradioterapia/efeitos adversos , Métodos Epidemiológicos , Feminino , Humanos , Histerectomia/efeitos adversos , Pessoa de Meia-Idade , Contração Muscular , Diafragma da Pelve/efeitos da radiação , Radioterapia/efeitos adversos , Disfunções Sexuais Fisiológicas/fisiopatologia , Resultado do Tratamento , Incontinência Urinária/fisiopatologia , Vagina/fisiopatologia
11.
Int. braz. j. urol ; 39(1): 46-54, January-February/2013. tab, graf
Artigo em Inglês | LILACS | ID: lil-670371

RESUMO

Aims: Describe the impact of surgery, radiotherapy and chemoradiation in the pelvic floor functions in cervical cancer patients. Materials and Methods: A prospective study with women submitted to radical hysterectomy (RH) (n = 20), exclusive radiotherapy (RT) (n = 20) or chemoradiation (CT/RT) (n = 20) for invasive cervical cancer. Urinary, intestinal and sexual function, as well as vaginal length and pelvic floor muscle contraction were evaluated. Comparisons between groups were performed by Kruskal-Wallis and Chi-square tests (p < 0.05). Results: The groups were similar in stress urinary incontinence incidence (p = 0.56), urinary urgency (p = 0.44), urge incontinence (p = 0.54), nocturia (p = 0.53), incomplete bowel emptying (p = 0.76), bowel urgency (p = 0.12) and soilage (p = 0.43). The CT/RT group presented a higher urinary frequency (p < 0.001) and diarrhea (p = 0.025). Patients in the RH group were more sexually active (p = 0.01) and experienced less dyspareunia (p = 0.021). Vaginal length was shorter in RT group (5.5 ± 1.9cm) and CT/RT(5.3 ± 1.5 cm) than in the RH group (7.4 ± 1.1 cm) (p < 0.001). Pelvic floor muscle contraction was similar (p = 0.302). Conclusions: RT and CT/RT treatment for cervical carcinoma are more associated to sexual and intestinal dysfunctions. .


Assuntos
Adulto , Feminino , Humanos , Pessoa de Meia-Idade , Carcinoma/terapia , Diafragma da Pelve/fisiopatologia , Neoplasias do Colo do Útero/terapia , Quimiorradioterapia/efeitos adversos , Métodos Epidemiológicos , Histerectomia/efeitos adversos , Contração Muscular , Diafragma da Pelve/efeitos da radiação , Radioterapia/efeitos adversos , Disfunções Sexuais Fisiológicas/fisiopatologia , Resultado do Tratamento , Incontinência Urinária/fisiopatologia , Vagina/fisiopatologia
12.
Contraception ; 87(4): 409-15, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23228505

RESUMO

BACKGROUND: The study was conducted to compare 5-year follow-up of levonorgestrel-releasing intrauterine system (LNG-IUS) or thermal balloon ablation (TBA) for the treatment of heavy menstrual bleeding (HMB). STUDY DESIGN: A prospective, randomized controlled trial comparing LNG-IUS (n=30) and TBA (n=28) was performed. Hysterectomy rates, hemoglobin level, bleeding pattern, well-being status and satisfaction rates were assessed. Comparisons between groups were performed by χ(2) test and by unpaired and paired t tests. RESULTS: After 5 years of follow-up, women treated with a TBA had higher rates of hysterectomy (24%) compared to the LNG-IUS group (3.7%) due to treatment failure (p=.039). Use of LNG-IUS resulted in higher mean hemoglobin (±SD) levels in comparison to the TBA group (14.1±0.3 vs 12.7±0.4 g/dL, p=.009). Menstrual blood loss was significantly higher in the TBA when compared to the LNG-IUS group (45.5% vs 0.0% p<.001). The psychological general well-being index scores were similar. Patient acceptability, perceived clinical improvement and overall satisfaction rates were significantly higher in women using LNG-IUS. CONCLUSION: Five-year follow-up of HMB treatment with LNG-IUS was associated with higher efficacy and satisfaction ratings compared to TBA.


Assuntos
Anticoncepcionais Femininos/administração & dosagem , Técnicas de Ablação Endometrial/métodos , Hipertermia Induzida , Dispositivos Intrauterinos Medicados , Levanogestrel/administração & dosagem , Menorragia/terapia , Adulto , Anticoncepcionais Femininos/sangue , Feminino , Seguimentos , Hemoglobinas/metabolismo , Humanos , Histerectomia , Levanogestrel/sangue , Menorragia/sangue , Menorragia/psicologia , Falha de Tratamento
13.
J Obstet Gynaecol Res ; 38(5): 810-6, 2012 May.
Artigo em Inglês | MEDLINE | ID: mdl-22435532

RESUMO

AIM: Inflammation is as an important factor in ovulation with the active participation of leucocytes and their inflammatory mediators. The present study was performed to compare the activity of the inflammatory enzymes myeloperoxidase (MPO) and N-acetylglucosaminidase (NAG) in patients with endometriosis-related infertility and in normally ovulating women undergoing intracytoplasmic sperm injection (ICSI). MATERIAL AND METHODS: This prospective study included infertile women undergoing ICSI treatment. These women were divided into two groups: endometriosis anovulation (n = 18) and normally ovulating (n = 20). NAG and MPO activity was evaluated colorimetrically in serum and in follicular fluids obtained at the time of oocyte retrieval. RESULTS: There was a significant correlation between the serum and follicular fluid activities of NAG and MPO (τ = 0.256, P = 0.025; and τ = -0.234, P = 0.041; respectively). Both serum and follicular fluid NAG activities were higher in patients with endometriosis compared to the control group (P < 0.001). MPO follicular fluid activity was lower in patients with endometriosis compared to normally ovulating women (P = 0.016). CONCLUSION: Infertile patients with endometriosis show a distinct pattern of serum and follicular fluid macrophage/neutrophil activation compared to normally ovulating women undergoing ICSI, which may reflect the role of immune and inflammatory alterations in endometriosis-related infertility.


Assuntos
Acetilglucosaminidase/metabolismo , Endometriose/enzimologia , Infertilidade Feminina/enzimologia , Peroxidase/metabolismo , Injeções de Esperma Intracitoplásmicas , Adulto , Endometriose/complicações , Feminino , Líquido Folicular/enzimologia , Humanos , Infertilidade Feminina/etiologia , Infertilidade Feminina/terapia , Inflamação/enzimologia , Estudos Prospectivos
14.
Reprod Sci ; 19(7): 704-11, 2012 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-22344731

RESUMO

The aim of this study was to evaluate inflammatory response in chronic anovulating infertility women undergoing intracytoplasmic sperm injection. Thirteen infertile women with chronic anovulation and 23 normally ovulating women were prospectively evaluated. N-acetylglucosaminidase (NAG), myeloperoxidase (MPO), monocyte chemoattractant protein 1 (MCP-1), and C-reactive protein (CRP) concentrations were evaluated in serum and follicular fluid. Women with chronic anovulation presented higher NAG and MPO activity in follicular fluid when compared with normally ovulating women. Serum MPO activity was higher in the control group compared to the chronic anovulation group. Both serum and follicular fluid CRP concentrations were higher in women with chronic anovulation in comparison with the control group. Higher MCP-1 follicular fluid concentrations and serum levels of CRP were associated with the occurrence of ovarian hyperstimulation syndrome. Patients with chronic anovulation exhibited significantly higher follicle macrophage/neutrophil activation as well as unspecific inflammatory response by comparison with normally ovulating women.


Assuntos
Anovulação/imunologia , Infertilidade Feminina/terapia , Ativação de Macrófagos , Ativação de Neutrófilo , Injeções de Esperma Intracitoplásmicas , Adulto , Anovulação/sangue , Anovulação/metabolismo , Anovulação/fisiopatologia , Biomarcadores/sangue , Biomarcadores/metabolismo , Estudos de Casos e Controles , Feminino , Líquido Folicular/imunologia , Líquido Folicular/metabolismo , Humanos , Infertilidade Feminina/etiologia , Estudos Prospectivos , Adulto Jovem
15.
Gynecol Obstet Invest ; 71(3): 145-50, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21150154

RESUMO

BACKGROUND/AIMS: This study aims to evaluate the pelvic floor (PF) tension response during simulated increased intra-abdominal pressure (IAP) and the vaginal biomechanical properties. METHODS: A 3-dimensional computational finite element model for PF was developed based on magnetic resonance imaging from a nulliparous healthy volunteer. The model was used to simulate an IAP of 90 cm H(2)O and to evaluate the PF stresses in the longitudinal and transversal axes. The vaginal samples were obtained from 15 non-prolapsed female cadavers. A uniaxial tensile test to obtain stiffness and maximum stress of vaginal tissue in the longitudinal and transversal axes was performed. RESULTS: The simulated IAP was associated with a similar PF stress state in the longitudinal and transversal axes. The stiffness and maximum stress in vaginal tissues presented a great variability between subjects. There was no difference in the vaginal tissue elasticity (6.2 ± 1.5 vs. 5.4 ± 1.1 MPa; p = 0.592) and maximum stress (2.3 ± 0.5 vs. 2.6 ± 0.9 MPa; p = 0.692) regarding the measurements in the longitudinal and transversal axes. CONCLUSION: The isotropic biomechanical behavior of vagina is in agreement with the PF stress state response during increased IAP.


Assuntos
Abdome/fisiologia , Pressão , Vagina/fisiologia , Adolescente , Adulto , Fenômenos Biomecânicos/fisiologia , Simulação por Computador , Feminino , Humanos , Imageamento por Ressonância Magnética , Pessoa de Meia-Idade , Modelos Biológicos , Diafragma da Pelve/fisiologia , Estresse Mecânico , Resistência à Tração , Adulto Jovem
17.
Am J Obstet Gynecol ; 203(3): 217.e1-6, 2010 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-20478549

RESUMO

OBJECTIVE: The purpose of this study was to investigate the influence of fetal head flexion during vaginal delivery with a 3-dimensional computational finite element model. STUDY DESIGN: A finite element model of the pelvic skeletal structure, pelvic floor, and fetus was developed. The movements of the fetus during birth were simulated in engagement, descent, flexion, internal rotation, and extension of the fetal head. The opposite forces against the fetal descendent and the stress of the pelvic floor muscles were obtained on simulations with different degrees of head flexion. RESULTS: The simulated increase in fetal head flexion is associated with lower values of opposite forces against the fetal descent. The descending fetus with abnormal head flexion also meets resistance in later stations. Lower stress on the pelvic floor was demonstrated with simulated increase in fetal head flexion during vaginal delivery. CONCLUSION: This analytic evidence suggests that the fetal head flexion during vaginal delivery may facilitate birth and protect the pelvic floor.


Assuntos
Simulação por Computador , Feto/fisiologia , Movimentos da Cabeça/fisiologia , Modelos Biológicos , Parto Obstétrico , Feminino , Análise de Elementos Finitos , Humanos , Parto/fisiologia , Diafragma da Pelve/fisiologia , Gravidez
18.
Obstet Gynecol ; 115(4): 804-808, 2010 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-20308842

RESUMO

OBJECTIVE: To estimate the influence of pelvic floor muscle activation during vaginal delivery using a three-dimensional computational finite element model. METHODS: A computational finite element model of the pelvic skeletal structure, pelvic floor, and fetus was developed. The movements of the fetus during birth, in vertex position, were simulated; namely, the engagement, descent, flexion, internal rotation, and extension of the fetal head. The opposite forces against the fetal descent and the stress on the pelvic floor muscles were obtained in passive, 5%, 10%, and 15% pelvic floor muscle simulated activations. RESULTS: The increase in pelvic floor muscle activation was associated with higher values of forces against the fetal descent. The descending fetus encountered increasing resistance in higher stations with the increase in pelvic floor muscle activation. The maximum values of stress of the pelvic floor muscles were obtained in +4 station. The increase in pelvic floor muscle activation was also followed by higher values of pelvic floor stress. CONCLUSION: This study demonstrates the feasibility of using a computational modeling approach to study parturition. This experimental evidence suggests that the pelvic floor muscle activation during vaginal delivery may represent an obstacle to fetal descent and increase the risk for pelvic floor injuries. LEVEL OF EVIDENCE: III.


Assuntos
Trabalho de Parto/fisiologia , Contração Muscular , Diafragma da Pelve/fisiologia , Fenômenos Biomecânicos , Simulação por Computador , Feminino , Feto/fisiologia , Análise de Elementos Finitos , Humanos , Apresentação no Trabalho de Parto , Complicações do Trabalho de Parto/fisiopatologia , Ossos Pélvicos/fisiologia , Diafragma da Pelve/lesões , Gravidez
19.
Contraception ; 81(3): 226-31, 2010 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-20159179

RESUMO

BACKGROUND: Use of the levonorgestrel-releasing intrauterine system (LNG-IUS) was compared with thermal balloon ablation (TBA) for the treatment of heavy menstrual bleeding (HMB). STUDY DESIGN: A prospective randomized trial comparing the LNG-IUS (n=30 women) and TBA (n=28 women). RESULTS: Hemoglobin levels increased (p<.001) and blood loss was reduced (p<.001) in both groups after 1 year of treatment. Menstrual bleeding was less in the LNG-IUS group compared to the TBA group at 6 and 12 months of treatment (p=.035 and p=.048, respectively). Intermenstrual bleeding was significantly less in the TBA group at 6 months compared to the LNG-IUS group (p=.044); however, there was no significant difference at 12 months (p=.129). No difference was found in psychological aspects between pre- and posttreatment variables in either of the groups (p=.537). CONCLUSIONS: Both the LNG-IUS and TBA appear to be effective in controlling HMB; however, posttreatment uterine bleeding patterns are different.


Assuntos
Técnicas de Ablação Endometrial , Dispositivos Intrauterinos Medicados , Levanogestrel/uso terapêutico , Menorragia/terapia , Adulto , Análise de Variância , Cateterismo/métodos , Feminino , Hemoglobinas/análise , Humanos , Satisfação do Paciente , Seleção de Pacientes , Qualidade de Vida , Inquéritos e Questionários , Resultado do Tratamento
20.
Ann Biomed Eng ; 37(8): 1594-600, 2009 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-19495980

RESUMO

Pelvic floor muscle (PFM) strength measurement provides useful information for the study of pelvic floor dysfunctions. Vaginal digital palpation, intravaginal pressure measurements, and the use of a dynamometric speculum represent currently available clinical methods for evaluating PFM strength. However, none of these methods provide a dynamic measurement of pelvic floor strength in multiple directions simultaneously. The aim of the present paper is to report the development and first measurement trial of a device that follows the vaginal canal morphology and is able to measure pelvic floor strength multidirectionally.


Assuntos
Dinamômetro de Força Muscular , Força Muscular , Palpação/instrumentação , Palpação/métodos , Diafragma da Pelve/fisiopatologia , Vagina/fisiopatologia , Ensaios Clínicos como Assunto , Feminino , Humanos , Diafragma da Pelve/patologia , Vagina/patologia
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