American journal of obstetrics and gynecology
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Am. J. Obstet. Gynecol. · Sep 2016
Textile properties of synthetic prolapse mesh in response to uniaxial loading.
Although synthetic mesh is associated with superior anatomic outcomes for the repair of pelvic organ prolapse, the benefits of mesh have been questioned because of the relatively high complication rates. To date, the mechanisms that result in such complications are poorly understood, yet the textile characteristics of mesh products are believed to play an important role. Interestingly, the pore diameter of synthetic mesh has been shown to impact the host response after hernia repair greatly, and such findings have served as design criteria for prolapse meshes, with larger pores viewed as more favorable. Although pore size and porosity are well-characterized before implantation, the changes in these textile properties after implantation are unclear; the application of mechanical forces has the potential to greatly alter pore geometries in vivo. Understanding the impact of mechanical loading on the textile properties of mesh is essential for the development of more effective devices for prolapse repair. ⋯ In this study, it was shown that the pore size of current prolapse meshes dramatically decreases in response to mechanical loading. These findings suggest that prolapse meshes, which are more likely to experience tensile forces in vivo relative to hernia repair meshes, have pores that are unfavorable for tissue integration after surgical tensioning and/or loading in urogynecologic surgeries. Such decreases in pore geometry support the hypothesis that regional increases in the concentration of mesh leads to an enhanced local foreign body response. Although pore deformation in transvaginal meshes requires further characterization, the findings presented here provide a mechanical understanding that can be used to recognize potential areas of concern for complex mesh geometries. Understanding mesh mechanics in response to surgical and in vivo loading conditions may provide improved design criteria for mesh and a refinement of surgical techniques, ultimately leading to better patient outcomes.
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Am. J. Obstet. Gynecol. · Sep 2016
Persistent opioid use following cesarean delivery: patterns and predictors among opioid-naïve women.
The incidence of opioid-related death in women has increased 5-fold over the past decade. For many women, their initial opioid exposure will occur in the setting of routine medical care. Approximately 1 in 3 deliveries in the United States is by cesarean, and opioids are commonly prescribed for postsurgical pain management. ⋯ A very small proportion of opioid-naïve women (approximately 1 in 300) become persistent prescription opioid users following cesarean delivery. Preexisting psychiatric comorbidity, certain pain conditions, and substance use/abuse conditions identifiable at the time of initial opioid prescribing were predictors of persistent use.
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Am. J. Obstet. Gynecol. · Sep 2016
Review Meta AnalysisNeuraxial analgesia to increase the success rate of external cephalic version: a systematic review and meta-analysis of randomized controlled trials.
External cephalic version is a medical procedure in which the fetus is externally manipulated to assume the cephalic presentation. The use of neuraxial analgesia for facilitating the version has been evaluated in several randomized clinical trials, but its potential effects are still controversial. ⋯ Administration of neuraxial analgesia significantly increases the success rate of external cephalic version among women with malpresentation at term or late preterm, which then significantly increases the incidence of vaginal delivery.
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Am. J. Obstet. Gynecol. · Sep 2016
Prenatal exposure to gestational diabetes mellitus as an independent risk factor for long-term neuropsychiatric morbidity of the offspring.
The reported rates of gestational diabetes mellitus are constantly escalating and little is known about long-term complications in the offspring. Evidence from the field of epigenetics strongly advocates the need for research on the neuropsychiatric complications in offspring prenatally exposed to gestational diabetes mellitus. ⋯ Exposure to maternal gestational diabetes mellitus is an independent risk factor for long-term neuropsychiatric morbidity in the offspring.
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Am. J. Obstet. Gynecol. · Sep 2016
Multicenter StudyDoes pregnancy increase the risk of abdominal hernia recurrence after prepregnancy surgical repair?
By increasing intraabdominal pressure, pregnancy may increase the risk of abdominal hernia recurrence. Current data are limited to studies with small sample size and thus the impact of pregnancy on recurrence is unclear. ⋯ Pregnancy is associated with an increased risk of abdominal hernia recurrence after adjusting for confounding factors. The magnitude of this association is likely underestimated, given that the risk of recurrence was defined as reoperation, which captures only the most clinically significant group of recurrences. This information will facilitate counseling for reproductive-aged women planning elective ventral or incisional hernia repair. The risk of recurrence and subsequent reoperation should be balanced against the risk of incarceration and emergent surgery during pregnancy. As such, the desire for future pregnancy and/or contraception should be considered when planning asymptomatic hernia repair for women of reproductive age.