3,396 results match your criteria Vacuum Extraction


Maternal and Neonatal Outcomes of Operative Vaginal Deliveries at a Single Tertiary Center.

Oman Med J 2021 May 31;36(3):e263. Epub 2021 May 31.

Pharmacy Department, Sultan Qaboos University Hospital, Muscat, Oman.

Objectives: Our study sought to assess the maternal and neonatal outcomes of operative vaginal deliveries (OVDs) at Sultan Qaboos University Hospital (SQUH). We assessed the proportion of OVDs along with the proportion of maternal and neonatal outcomes of kiwi OmniCup vacuum, metal cup vacuum, and forceps deliveries.

Methods: We conducted a retrospective cohort study in the Obstetrics and Gynecology Department at SQUH from June 2015 to March 2018. Read More

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Can we improve our ability to interpret category II fetal heart rate tracings using additional clinical parameters?

J Perinat Med 2021 Jun 9. Epub 2021 Jun 9.

Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba, Israel.

Objectives: This study examined predictive factors, in addition to Category II Fetal Herat Rate (FHR) monitoring that might imply fetal acidosis and risk of asphyxia.

Methods: This retrospective cohort study compared three groups of patients with Category II FHR monitoring indicating need for imminent delivery. Groups were divided based on fetal cord blood pH: pH≤7. Read More

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Identification and characterization of volatile compounds in Lentinula edodes during vacuum freeze-drying.

J Food Biochem 2021 Jun 4:e13814. Epub 2021 Jun 4.

College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China.

In this study, modified headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography-mass spectrometry (GC-MS) and electronic nose (E-nose) were utilized to investigate the dynamic aroma changes of Lentinula edodes (L. edodes) at different stages of vacuum freeze drying (VFD). The extraction efficiency of volatile compounds from vacuum freeze-dried L. Read More

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Novel four-dimensional approach for the structural characterization of neutral nitrogen compounds in vacuum gas oils using UHPLC-IM-QqToF analysis.

Anal Chim Acta 2021 Jul 11;1169:338611. Epub 2021 May 11.

Univ. Lille, CNRS, UMR 8516 - LASIRE - Laboratoire avancé de spectroscopie pour les interactions, la réactivité et l'environnement, 59000, Lille, France. Electronic address:

The molecular analysis of complex matrices such as vacuum gas oils require powerful instruments such as Fourier-Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS). As this technique does not allow the separation of two isomers, ion mobility coupled to mass spectrometry (IMMS) can be used to target a structural detail. However, the resolving power of ion mobility is not sufficient to resolve isomers in such a complex mixture. Read More

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Correlative Site-Specific Sample Preparation for Atom Probe Tomography on Complex Microstructures.

Microsc Microanal 2021 Jun 3:1-10. Epub 2021 Jun 3.

Department of Materials Science and Engineering, Saarland University, Campus D 3.3, D-66123Saarbrücken, Germany.

Site-specific specimen preparation for atom probe tomography (APT) is a challenging task. Small features need to be located using a suitable imaging technique and captured within a volume of less than 0.01 μm3. Read More

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Thermal and Mechanical Characterization of Carbides for High Temperature Nuclear Applications.

Materials (Basel) 2021 May 20;14(10). Epub 2021 May 20.

Department of Industrial Engineering, University of Padova, Via Venezia 1, 35131 Padova, Italy.

In the facilities for the production of Radioactive Ion Beams (RIBs) according to the Isotope Separation On-Line (ISOL) technique, a production target is typically impinged by a high-power primary beam, generating radioactive isotopes for basic research and technological applications. With the aim to guarantee an efficient extraction of the aforementioned isotopes, the production target must work in a high vacuum environment, at temperatures that are usually between 1600 °C and 2200 °C. Its main components are often characterized by intense temperature gradients and consequently by severe thermal stresses. Read More

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[Compression-hypoxic birth injuries and skull configuration].

Authors:
V V Vlasyuk

Arkh Patol 2021 ;83(3):70-74

Kirov Military Medical Academy, St. Petersburg, Russia.

The fetus has birth traumatic, compression-hypoxic, and hypoxic-ischemic brain lesions during childbirth. There are problems in their differentiation in clinical and anatomopathological practice. It is proposed to divide birth traumatic injuries into two types: 1) obvious traumatic injuries and 2) compression-hypoxic traumatic injuries. Read More

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Double-sheath vacuum suction versus vacuum-assisted sheath minimally invasive percutaneous nephrolithotomy for management of large renal stones: single-center experience.

World J Urol 2021 May 25. Epub 2021 May 25.

Department of Urology, Zhongnan Hospital of Wuhan University, Donghu Road #169, Wuchang District, Wuhan, 430071, Hubei, China.

Purpose: To compare double-sheath vacuum suction minimally invasive percutaneous nephrolithotomy (DS-mini-PCNL) with vacuum-assisted mini-PCNL (VS-mini-PCNL) and to better define the potential benefits of DS-mini-PCNL.

Methods: Between July 2019 and May 2020, 117 patients with large radiopaque renal stones underwent mini-PCNL. Of these, 63 underwent DS-mini-PCNL and 54 underwent VS-mini-PCNL. Read More

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Obstetric anal sphincter injury and anal incontinence.

Ceska Gynekol 2021 ;86(2):118-122

Objective: The aim of our study is to clarify the problems of OASI (obstetric anal sphincter injuries) and anal incontinence and prevention of this injury.

Methods: Review of articles in peer reviewed journals with the usage of Google Scholar function and PubMed.

Conclusion: OASI is a severe injury which is more commonly associated with assisted vaginal delivery. Read More

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Magnetron sputtered ZnO electron transporting layers for high performance perovskite solar cells.

Dalton Trans 2021 May;50(19):6477-6487

School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, P. R. China.

An ideal electron transporting layer (ETL) of perovskite solar cells (PSCs) requires reasonable energy levels, high electrical conductivity and excellent charge extraction. The low processing temperature makes ZnO a promising ETL for PSCs; however the widely used solution-processed ZnO films often suffer from high-density surface defect states, which might cause severe charge recombinations at the ETL/perovskite interface and accelerate the chemical decomposition of perovskite materials. In this work, we employed the vacuum-based magnetron sputtering method to deposit ZnO ETLs, which significantly reduces the number of oxygen vacancies and hydroxyl groups on the ZnO surface. Read More

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Effects of vacuum packaging storage of minimally processed cassava roots at various temperatures on microflora, tissue structure, starch extraction by wet milling and granule quality.

J Sci Food Agric 2021 May 10. Epub 2021 May 10.

Department of Consumer and Food Sciences and Institute for Food, Nutrition and Well-being, University of Pretoria, Pretoria, South Africa.

Background: Vacuum package storage is commonly applied to reduce postharvest deterioration in minimally processed cassava roots. However, the influence of vacuum packaging conditions on root end-use quality is poorly understood. Hence, the effects of vacuum packaged storage at ambient, refrigerated and freezing temperatures on microflora, cassava tissue structure and starch extraction by wet milling were studied. Read More

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Optical Distance Measurement Based on Induced Nonlinear Photoresponse of High-Performance Organic Near-Infrared Photodetectors.

ACS Appl Mater Interfaces 2021 May 7;13(19):23239-23246. Epub 2021 May 7.

Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universität Dresden, Nöthnitzer Str. 61, 01187 Dresden, Germany.

Extraction barriers are usually undesired in organic semiconductor devices since they lead to reduced device performance. In this work, we intentionally introduce an extraction barrier for holes, leading to nonlinear photoresponse. The effect is utilized in near-infrared (NIR) organic photodetectors (OPDs) to perform distance measurements, as delineated in the focus-induced photoresponse technique (FIP). Read More

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Vacuum-Assisted Drying Process for Screen-Printable Carbon Electrodes of Perovskite Solar Cells with Enhanced Performance Based on Cuprous Thiocyanate as a Hole Transporting Layer.

ACS Appl Mater Interfaces 2021 May 5;13(19):22684-22693. Epub 2021 May 5.

CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China.

Carbon-based perovskite solar cells without a hole transport layer (HTL) are considered to be highly stable and of low cost. However, the deficient interface contact and inferior hole extraction capability restrict the further improvement of the device efficiency. Introducing a hole transporting layer, such as cuprous thiocyanate (CuSCN), can enhance the hole extraction ability and improve the interface contact. Read More

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Neonatal outcome of second-stage cesarean delivery versus vacuum extraction among neonates <34 weeks.

J Matern Fetal Neonatal Med 2020 Dec 1:1-8. Epub 2020 Dec 1.

Department of Obstetrics and Gynecology, The Chaim Sheba Medical Center, Ramat-Gan, Israel.

Objective: Among deliveries <34 weeks, there is inconclusive evidence regarding the preferred route of delivery when there is a need to expedite delivery during the second stage of labor. As it is unreasonable that future randomized controlled trials will be conducted to settle this query, every clinical data concerning this topic, may be helpful. We aim to compare neonatal outcomes among women undergoing emergent cesarean delivery (ECD) versus vacuum-assisted delivery (VAD) during the second stage of labor among singleton gestations <34 weeks. Read More

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December 2020

Determination of Saffron Volatiles by HS-SBSE-GC in Flavored Cured Ham.

Molecules 2021 Apr 4;26(7). Epub 2021 Apr 4.

Cátedra de Química Agrícola, ETSI Agrónomos y de Montes, Universidad de Castilla-La Mancha, Campus Universitario, 02071 Albacete, Spain.

At present, the development of new agri-food products, including flavored meat products presented in ready-to-eat vacuum packs, is encouraged. The addition of ingredients used as flavoring agents creates the need to be able to determine the volatile compounds responsible for their characteristic aroma. The aim of this study is to propose, develop, and validate a new method that uses headspace-stir bar sorptive extraction-gas chromatography/mass spectrometry (HS-SBSE-GC/MS) to determine the saffron aroma in cured ham flavored with this spice. Read More

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Simulation training program for vacuum application to improve technical skills in vacuum-assisted vaginal delivery.

BMC Pregnancy Childbirth 2021 Apr 28;21(1):338. Epub 2021 Apr 28.

Department of Clinical and Experimental Medicine, University of Pisa, Via Roma 67, 56126, Pisa, Italy.

Objective: evaluation of technical skills of the operators during the obstetrical device application for operative vaginal delivery, named kiwi-cup in a simulation training program.

Methods: Thirty-five residents in obstetrics and gynecology of the University of Pisa, Italy were recruited and evaluated with an assessment scale on technical skills from 0 to 55 points. They performed various operative vaginal delivery simulations with kiwi-cup and were evaluated at time 0 by a tutor. Read More

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Misoprostol vs dinoprostone vaginal insert in labour induction: comparison of obstetrical outcome.

Sci Rep 2021 Apr 27;11(1):9077. Epub 2021 Apr 27.

Collegium Medicum, Jan Kochanowski University in Kielce, Kielce, Poland.

Induction of labour (IOL) is increasingly used in obstetric practice. For patients with unfavourable cervix, we are constantly looking for an optimal, in terms of effectiveness and safety, ripening of cervix protocol. It was retrospective cohort study. Read More

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Fabrication and characterization of a miniaturized octupole deflection system for the MEMS electron microscope.

Ultramicroscopy 2021 Jun 20;225:113288. Epub 2021 Apr 20.

Wroclaw University of Science and Technology, Faculty of Microsystem Electronics and Photonics, Janiszewskiego 11/17, 50-372 Wroclaw.

This article describes a miniature electron beam scanning system based on an octupole electrode as the key stage of the implementation of the MEMS electron microscope. The scanning system consists of a silicon electrode with a central hole, containing 8 properly powered elements and a special electronic system controlling voltage. Octupole electrode was made using MEMS technology. Read More

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Analysis of Nonvolatile Molecules in Supercritical Carbon Dioxide Using Proton-Transfer-Reaction Ionization Time-of-Flight Mass Spectrometry.

Anal Chem 2021 05 23;93(17):6589-6593. Epub 2021 Apr 23.

Project Research Center for Fundamental Sciences, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.

Proton-transfer-reaction (PTR) mass spectrometry (MS) is capable of detecting trace-level volatile organic compounds (VOCs) in gaseous samples in real time. Therefore, PTR-MS has become a popular method in many different study areas. Most of the currently reported PTR-MS applications are designed to determine volatile compounds. Read More

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Robotized Noncontact Open-Space Mapping of Volatile Organic Compounds Emanating from Solid Specimens.

Anal Chem 2021 05 22;93(17):6889-6894. Epub 2021 Apr 22.

Department of Chemistry, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan.

Analysis of volatile organic compounds (VOCs) is normally preceded by sample homogenization and solvent extraction. This methodology does not provide spatial resolution of the analyzed VOCs in the examined matrix. Here, we present a robotized pen-shaped probe for open-space sampling and mapping of VOCs emanating from solid specimens (dubbed "PENVOC"). Read More

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Factors related to the practice of vacuum-assisted birth: findings from provider interviews in Kigoma, Tanzania.

BMC Pregnancy Childbirth 2021 Apr 14;21(1):302. Epub 2021 Apr 14.

Vital Strategies, New York, USA.

Background: Vacuum-assisted birth is not widely practiced in Tanzania but efforts to re-introduce the procedure suggest some success. Few studies have targeted childbirth attendants to learn how their perceptions of and training experiences with the procedure affect practice. This study explores a largely rural cohort of health providers to determine associations between recent practice of the procedure and training, individual and contextual factors. Read More

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Improving the Photovoltaic Performance of Flexible Solar Cells with Semitransparent Inorganic Perovskite Active Layers by Interface Engineering.

ACS Appl Mater Interfaces 2021 May 13;13(17):20034-20042. Epub 2021 Apr 13.

State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, P. R. China.

Inorganic perovskite CsPbBr has broad application prospects in photovoltaic windows, tandem cells, and other fields due to its intrinsic semitransparency, excellent photoelectric properties, and stability. In this work, a high-quality semitransparent CsPbBr film was prepared by a sequential vacuum evaporation deposition method without high-temperature annealing and successfully used as the active layer of flexible perovskite solar cells (F-PSCs) for the first time, achieving a power conversion efficiency (PCE) of 5.00%. Read More

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Risk factors for stress and urge urinary incontinence during pregnancy and the first year postpartum: a prospective longitudinal study.

Int Urogynecol J 2021 Apr 9. Epub 2021 Apr 9.

Department of Pediatrics, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan.

Introduction And Hypothesis: We examined obstetric and maternal-newborn factors and UI history for stress urinary incontinence (UI) and urge UI during pregnancy and the first year postpartum.

Methods: This prospective cohort study included 1447 pregnant women who underwent prenatal examinations and completed an Incontinence Questionnaire-Urinary Incontinence Short Form before pregnancy, during early, mid- and late pregnancy, and at five visits during the first year postpartum. Data were analyzed using univariate/multivariate generalized estimating equation (GEE) logistic regression analyses. Read More

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Second stage expedite delivery of low birth weight neonates: Emergent cesarean delivery versus vacuum assisted delivery.

J Gynecol Obstet Hum Reprod 2021 Apr 2;50(8):102136. Epub 2021 Apr 2.

The Department of Obstetrics and Gynecology, The Chaim Sheba Medical Center, Israel and the Faculty of Medicine, Tel-Aviv University, Ramat-Gan, Tel-Aviv, Israel. Electronic address:

Objective: To determine maternal and neonatal outcomes among women undergoing second stage emergent cesarean delivery (ECD) versus vacuum-assisted delivery (VAD) of low birthweight neonates.

Materials And Methods: A retrospective cohort study from two tertiary medical centers. We included women who underwent either ECD or VAD during the second stage of labor, and delivered neonates with a birthweight of <2500 g during 2011-2019. Read More

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SARS-CoV-2 in Pregnancy-The First Wave.

Medicina (Kaunas) 2021 Mar 5;57(3). Epub 2021 Mar 5.

Bissaya Barreto Maternity-Obstetrics Service B, Coimbra Hospital and University Center, 3000 Coimbra, Portugal.

COVID-19, a disease caused by SARS-CoV-2, is a public health emergency. Data on the effect of the virus on pregnancy are limited. We carried out a retrospective descriptive study, in order to evaluate the obstetric results on pregnant women in which SARS-CoV-2 was detected through RT-PCR of the nasopharyngeal swab, at admission to the maternity hospital. Read More

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Use of vacuum-assisted aspiration for removal of vegetations during transvenous lead extraction.

HeartRhythm Case Rep 2021 Mar 19;7(3):170-173. Epub 2020 Dec 19.

Cardiovascular Division, Park Nicollet Heart & Vascular Center - Methodist Hospital, St Louis Park, Minnesota.

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Spatulas for operative vaginal birth: A systematic review and meta-analysis.

Int J Gynaecol Obstet 2021 Mar 23. Epub 2021 Mar 23.

Obstetrics and Gynecology Department, Faculty of Medicine, Universidad Nacional de Colombia, Bogotá, Colombia.

Background: Operative vaginal birth represents an alternative to address problems during the second stage of labor. Obstetricians have access to three different instruments forceps, vacuum, and spatulas.

Objective: To evaluate the safety and effectiveness of the use of spatulas for operative vaginal birth. Read More

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Urogynecology in obstetrics: impact of pregnancy and delivery on pelvic floor disorders, a prospective longitudinal observational pilot study.

Arch Gynecol Obstet 2021 Mar 22. Epub 2021 Mar 22.

Department of Gynecology, Obstetrics and Reproductive Medicine, University Medical School of Saarland, Kirrberger Straße, 66421, Homburg, Saar, Germany.

Purpose: To assess changes in the pelvic floor anatomy that cause pelvic floor disorders (PFDs) in primigravidae during and after pregnancy and to evaluate their impact on women's quality of life (QoL).

Methods: POP-Q and translabial ultrasound examination was performed in the third trimester and 3 months after delivery in a cohort of primigravidae with singleton pregnancy delivering in a tertiary center. Results were analyzed regarding mode of delivery and other pre- and peripartal factors. Read More

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