Study Objective: To demonstrate the surgical technique of laparoscopic cerclage (LAC) in nonpregnant women with a clinical diagnosis of cervical incompetence. In this video, the authors describe the complete procedure in 10 steps to standardize and facilitate the comprehension and performance of the procedure in a simple and safe way.
Design: Step-by-step video demonstration of the surgical technique.
Setting: Private hospital in Curitiba, Paraná, Brazil.
Interventions: The patient was 32 years old (gravidity and parity, G3A3; late progressive miscarriage), had no comorbidities, and had a radiologic diagnosis of cervical incompetence. The main steps of LAC are described in detail. A complete laparoscopic approach was performed. Under general anesthesia, the patient was placed in the 0-degree supine decubitus position with arms alongside her body. The operative setup included a 15-mm Hg pneumoperitoneum created using the closed Veress technique and 4 trocars: a 10-mm trocar at the umbilicus for a 0-degree laparoscope; a 5-mm trocar in the right iliac fossa; a 5-mm trocar in the left iliac fossa; and a 5-mm trocar in the suprapubic area. After systematic exploration of the pelvic and abdominal cavities, the procedure began. Step 1 involved identification of anatomic key landmarks and exposure of the operation field. Step 2 involved opening of the anterior peritoneum. The anterior peritoneal reflection was opened over the peritoneum uterovesicalis and then extended laterally until the uterine artery could be clearly identified on both sides. Step 3 involved dissection of the avascular space on each side of the uterus. The vesical-cervical avascular space was created, and the bladder was pushed down, away from the isthmus area. Step 4 involved preparation for a perfect stitch placement. A 5-mm Mersilene suture (Ethicon, Somerville, NJ) with a straight needle was introduced by a suprapubic trocar into the abdominal cavity before a complete identification of uterine vessels at both the sides using atraumatic graspers. Step 5 involved identification of the perfect space in the posterior aspect for Mersilene suture placement. Step 6 was to make a perfect anterior stitch. For this, the needle was grasped at the proximal portion in a 90-degree angle. In posterior position and when helped by a cranial and posterior uterine mobilization, the needle passed through the right, broad ligament in the avascular space created on the anterior leaf and medially from the uterine artery until the tip of the needle was seen on the posterior face above the uterosacral ligament. All steps were possible by synchronic uterine mobilization. Step 7 was to make a perfect posterior stitch. The procedure was then repeated contralaterally following the same anatomic and technical precepts but from posteriorly to anteriorly. Step 8 involved correct positioning and orientation of the Mersilene suture far away from the ureter and medial to the uterine arteries 2 cm over the uterosacral ligaments. Step 9 involved fixation of the Mersilene suture with an adequate blocking sequence. Step 10 involved fixation of the Mersilene suture and reperitonealization. The tape was knotted with an adequate blocking intracorporeal suturing sequence at the cervicoisthmic junction, and a Monocryl 2-0 stitch (Ethicon, Somerville, NJ) was made to fix the knot and left it horizontally. Finally, the procedure was ended with anterior reperitonealization, covering all the plica uterovesicalis and mesh, leaving it completely extraperitoneal. The surgery ended without any intraoperative complications and within 30 minutes. Patient was discharged on the first day postoperatively and became pregnant 6 months after surgery, with a C-section delivery of a healthy term newborn at 39 weeks of gestational age.
Conclusion: LAC in nonpregnant women with a diagnosis of cervical incompetence is safe and feasible in experienced hands, adding all the intrinsic advantages of minimally invasive surgery and providing better obstetric outcomes. In this patient, the procedure was performed without any intra- or postoperative complications, and the patient had an uneventful term pregnancy in the follow-up period. We must remember that adequate standardization of surgical procedures will help reduce the learning curve.
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http://dx.doi.org/10.1016/j.jmig.2019.10.019 | DOI Listing |
G3 (Bethesda)
January 2025
School of Life Sciences, Center for Evolution & Medicine, Arizona State University, Tempe, AZ 85281, USA.
The demographic history of a population, and the distribution of fitness effects (DFE) of newly arising mutations in functional genomic regions, are fundamental factors dictating both genetic variation and evolutionary trajectories. Although both demographic and DFE inference has been performed extensively in humans, these approaches have generally either been limited to simple demographic models involving a single population, or, where a complex population history has been inferred, without accounting for the potentially confounding effects of selection at linked sites. Taking advantage of the coding-sparse nature of the genome, we propose a 2-step approach in which coalescent simulations are first used to infer a complex multi-population demographic model, utilizing large non-functional regions that are likely free from the effects of background selection.
View Article and Find Full Text PDFMinerva Obstet Gynecol
January 2025
Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy.
Introduction: Polycystic ovary syndrome (PCOS) is a heterogeneous endocrine-metabolic syndrome mainly characterized by ovarian dysfunction, which is only one manifestation of a more complex syndrome with a significant systemic impact.
Evidence Acquisition: We review scientific literature on the pathophysiology and diagnosis of PCOS evaluating the most relevant data from original articles, reviews and meta-analyses published until June 2024.
Evidence Synthesis: From a pathophysiological point of view, the concurrence of both metabolic aspects, such as insulin resistance and obesity, and hormonal alterations, such as hyperandrogenemia, might produce the most relevant clinical signs and/symptoms of this syndrome, for instance menstrual irregularities, hair loss, acne and hirsutism.
Microbiol Spectr
January 2025
Department of Veterinary Population Medicine, University of Minnesota, St. Paul, Minnesota, USA.
The goal of this study was to characterize the microbial profile of two different fresh pork cuts, bootjack (BJ) trim and tenderloin (TL), through a 16S rRNA sequencing workflow developed specifically for investigating low-biomass fresh meat within a commercial production schedule. Additionally, this study aimed to determine a baseline prevalence and enumeration profile across these two fresh pork cuts. Results showed that microbiome diversity was different between the BJ and TL, and also differed significantly by processing date.
View Article and Find Full Text PDFAnal Chem
January 2025
School of Chemistry and Chemical Engineering, State Key Laboratory of Digital Medical Engineering, Southeast University, Nanjing 211189, China.
PIWI-interacting RNAs (piRNAs) are a class of small noncoding RNAs associated with PIWI proteins within the male germline, and they play significant roles in maintaining genome stability via the modulation of gene expression. The piRNAs are implicated in the progression of various cancers, but the simultaneous monitoring of multiple piRNAs remains a challenge. Herein, we construct a single-molecule biosensor based on polymerization-transcription-mediated target regeneration for the simultaneous one-pot detection of multiple piRNAs.
View Article and Find Full Text PDFFront Big Data
January 2025
Climate and Environmental Physics, Physics Institute, University of Bern, Bern, Switzerland.
Atmospheric ozone chemistry involves various substances and reactions, which makes it a complex system. We analyzed data recorded by Switzerland's National Air Pollution Monitoring Network (NABEL) to showcase the capabilities of machine learning (ML) for the prediction of ozone concentrations (daily averages) and to document a general approach that can be followed by anyone facing similar problems. We evaluated various artificial neural networks and compared them to linear as well as non-linear models deduced with ML.
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