Funiculars anomalies during childbirth: about 562 cases collected in Pikine National Hospital

Background: Establish an epidemiological description of the different types of umbilical cord anomalies in our reference structure and to assess their impact on the prognosis of childbirth.Methods: We conducted a descriptive study, cross over a period of one year in Obstetrics and Gynecology Service Level III of Pikine Hospital. We included all women in labor have reached the term less than 28 weeks gestation and delivering a newborn with umbilical cord abnormality diagnosed during labor or during the expulsion.Results: During this period, we compiled 562 anomalies of the umbilical cord, which gave a frequency of 23.8%. Length discrepancies were far the most frequent (67.4%). Only the prolapsed cord was an independent risk factor for cesarean section (p = 0.036). The rate of episiotomy and tear was significantly higher in case of brevity (primitive or induced) cord (p = 0.042). Apgar score ≤7 was significantly related to the presence of brevity (p = 0.000), excessive length (p = 0.048) or cord prolapse (p = 0.037).Conclusions: This study has allowed us to see that the funicular abnormalities impede the smooth running of childbirth. Their occurrence is facilitated by the excess amniotic fluid, prematurity and low birth weight. Their research during prenatal ultrasounds should be systematic

Analysis of non-native fluorescent pesticides by thermo-induced and photo-induced fluorescence, a comparative study

This paper compares the performance of three analytical methods for the determination of pesticides in natural waters. As many pesticides are non-fluorescent, they are transformed into highly fluorescent by-products in two ways: elevated temperature in an alkaline medium (thermo-induced fluorescence - TIF); or UV irradiation in water (photo-induced fluorescence - PIF). The first method studied uses TIF, the second one uses PIF and the third one uses an automatic sampling and analysing PIF system. Analytical applications were carried out using the three methods for the determination of deltamethrin and cyhalothrin, pesticides widely used in Senegal. In both cases, the calibration curves obtained are linear without matrix effects, and the detection limits are good in the ng mL−1 range. It appears that the analytical performances of the automatic PIF method are better than the two others. The advantages and disadvantages of the three methods are then compared and discussed in term of analytical performance and usability

Analysis of Oxadiazon Herbicide in Natural Water Samples by a Micellar-enhanced Photo-induced Fluorescence

International audienceA micellar-enhanced photo-induced fluorescence (ME-PIF) method was developed to analyze, for the first time, oxadiazole herbicide (namely oxadiazon) in natural water samples. Photo-conversion under UV irradiation of the herbicide into strongly fluorescent photoproducts was performed in aqueous solution and in the presence of two surfactants, cetyltrimethylammonium chloride (CTAC) or Tween 20, at micellar concentrations. The ME-PIF parameters were optimized. The ME-PIF method gave very good results with satisfactory analytical performance for the determination of a selected pesticide with concentration linear dynamic ranges of over one to two orders of magnitude. It yielded good reproducibility (RSD values of between 3.6 and 9.6%) in tap, river and sea water spiked samples, and the limits of detection were in the ng mL-1 range

Solvolysis kinetic study and direct spectrofluorimetric analysis of the fungicide benomyl in natural waters

International audienceA direct spectrofluorimetric method for the quantitative analysis of benomyl in natural waters is described. Benomyl is an instable, fluorescent fungicide that mainly decomposes into carbendazim and n-butyl-isocyanate in organic and aqueous solutions. The kinetics of benomyl solvolysis reactions were investigated in organic solvents (methanol and acetonitrile) and in aqueous solvent systems, including β–cyclodextrin (β-CD), sodium dodecyl sulfate (SDS), dodecyltrimethylammonium chloride (DTAC), cetyltrimethylammonium chloride (CTAC), cetyltrimethylammonium hydroxide (CTAOH), Brij-700, Triton X-100 and water, at different pH and/or NaOH concentrations. The benomyl fluorescence signal was found to be quasi-completely stable in 10-2 M NaOH aqueous solution, various alkaline (10-2 M NaOH) organized media, β-CD neutral solution and Triton X-100 aqueous solutions of different pH. Based on these results, a direct spectrofluorimetric analytical method was developed for the determination of benomyl in 10-2 M NaOH aqueous solution and Triton X-100 solutions (pH7 and 10-2 M NaOH), with wide linear dynamic range (LDR) values of two to three orders of magnitude, very low limit of detection (LOD) and limit of quantification (LOQ) values of, respectively, 0.002-0.5 ng/mL and 0.007-2.0 ng/mL, and small relative standard deviation (RSD) values of 0.2-1.7 %, according to the medium. This direct spectrofluorimetric method was applied to the evaluation of benomyl residues in natural waters, with satisfactory recovery values (87-94%).</p

Pituitary microadenoma with prolactin, corticotropic and thyreotropic deficiency: from infertility to pregnancy : About a case

Pituitary adenomas are benign tumors developed at the expense of different cellular populations of the pituitary gland. Within the pituitary gland, several cell populations may be involved, but the lactotropic cells remain the most frequently affected by this hyperplasia. For both sexes, the overall frequency of adenomas is 100 per million, of which 40% are prolactinomas. The stimulating effect of estrogens (combined oral contraceptives and pregnancy) on lactotropic cells has long been demonstrated, and in general, only large tumors (macroadenomas) have an evolving risk to be feared during pregnancy. The diagnosis rests on the one hand on the evidence of a hormonal hypersecretion of the cell population concerned as well as a hormonal deficiency of the other cell groups which can be compressed by the tumor. On the other hand, this diagnosis uses hypophyseal magnetic resonance imaging (MRI) to distinguish, according to their size, microadenomas (diameter less than 10 mm) from macroadenomas (diameter greater than 10 mm) pituitary. The risk of increasing the volume of the adenoma during pregnancy depends on the initial size of the tumor. This risk is evaluated at 2% for microadenoma and 15-35% for macroadenomas. However, the most severe complication during pregnancy remains paroxysmal acute growth or pituitary apoplexy by necrotic-haemorrhagic phenomena. The management is mainly based on prolactinoma on bromocryptin or cabergoline and sometimes surgery, urgently in the presence of a pituitary apoplexy or in the presence of an evolutionary macroadenoma

Determination of Agmatine Rate by Spectrofluorimetric Method in Alkaline Medium: Optimization and Application on Shrimp.

International audienc

Comparison between standing and adjusted heights in Senegalese women

International audienc

Light effects on Carbofuran and Fluometuron: Impact on natural waters. Spectrophotometric study

International audienc

Comparison between standing and adjusted heights in Senegalese women

International audienc

Ultraviolet Photo-Induced Fluorescence Followed by Laser Excitation (UV-PIF-LE) for the Determination of Pesticides in Natural Waters

International audienceA new method was developed for determining trace amounts of pesticides, using an ultraviolet (UV) lamp to obtain photo-induced fluorescent (PIF) compounds, and then using laser excitation (LE) by a tunable source to excite and simultaneously characterize their fluorescence over a short acquisition time using an intensified charge-coupled device camera. This new UV-PIF-LE method was applied to determine isoproturon, oxadiazon, and fipronil in natural waters. This approach represents an improvement on the previously published direct laser photo-induced fluorescent (DL-PIF) approach that utilized the inclusion of a supplementary UV irradiation device in the experimental setup, permitting the separation of the formation and detection steps for the PIF analytes. This evolution improves the selectivity and increases the sensitivity while maintaining a short analysis time. The UV-PIF-LE method gave very good results with satisfactory analytical performance for the determination of the selected pesticides. This approach also demonstrated good reproducibility, with relative square deviation values between 3.3% and 6.3%, for spiked river water and seawater samples with detection limits in the ng mL−1 range