Advances in Clinical Toxicology

Overview

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Key numbers

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MEDWIN PUBLISHERS ISSN: 2577-4328
University of Antofagasta, Chile Volume 8 Issue 4
*Corresponding author: Isabel Pizarro Veas, Laboratory of Bio-Inorganic Chemistry and Published Date: November 03, 2023
Environmental Analytics, Department of Chemistry, Faculty of Basic Sciences, University of DOI: 10.23880/act-16000283
Antofagasta, Tel: 5655 637884; Email: isabel.pizarro@uantof.cl
2 Advances in Clinical Toxicology
toxic effects of the heavy metals (12) are characteristic of
and they determine the concept of heavy metal (1). At global demonstration (8), which endorses the work that is made
presently century (2). The metallobiological responses to it is assumed they could serve as model to predict the events
in deceased have demonstrated the narrow relationship greasier, but the proteins don’t suffer alteration (9).
the corresponding autopsies (4). element and noxious presence of heavy metals in the course
metalloenzymes (Fe, Zn, Cu, Mn, Co, Ni, Mo, Se). However, foetal development are a complex paradigm (10,11,13).
clinical aspects (7). functional and cognitive effects seen at birth, but also effects
Membrane, and Umbilical Cord of Human Beings. Adv Clin Toxicol 2023, 8(4): 000283.
3 Advances in Clinical Toxicology
pregnancy (14-17). arsenic, it was found that at least in the last stage of the
of the foetus. Changes in placental development and function effects (25-30).
maternal blood comes into direct contact with placental Hospital of Antofagasta among the years 1991 – 1992 and
trophoblast cells and allows an intimate relationship 1996 – 2000, respectively. The trace element studied were
(18). A human normal placenta has a diameter of about 22 residual concentrations of the investigated trace element
cm, a thickness 2.0 – 2.5 cm and a weight of about 470 g. were also rationalized according to the answers of a survey
colour of the hairy tissues (19); at the end is the umbilical This work was carried out with the consent and
typical cord of about 55. 6 cm and a diameter of 2.0 – 2.5 cm, authorization of the Regional Hospital of Antofagasta, which
The current knowledge of the transfer of water and For 14 serial weeks between August of 1991 and March
minerals through the placenta are based on the observation of 1992 116 placentas were collected with their segments of
in alone 3 to 4 species (sheep, pigs of Guinea and human umbilical cord, to a rate of 8 normal childbirths per week;
they have been described in detail (20). The human placentas those that metal forceps were used they were not collected.
are hemomonocoriales and the knowledge of the trace Between April of 1996 and April of 2000, 27 placentas were
multiple membrane that discriminates against among the those creatures with a gestation age among 38 and 42 weeks
metals (21,22), since they can leave a residual print or metal that they present characteristic pathologies of babies with
the environmental conditions to that the mother has been of NB babies happened between November of 1990 and July
exposed, which can be passed over to the foetus”. of 1991, more than one year after they were in operation the
Membrane, and Umbilical Cord of Human Beings. Adv Clin Toxicol 2023, 8(4): 000283.
4 Advances in Clinical Toxicology
they entered in operation the year 1989 in substitution of surgical steel and cut in small pieces with knives of Titanium
to smaller concentrations that 100 µg / L, and in the best in drain the water excess for one night to ambient temperature
the cases after 1989 in near concentrations to 50 µg / L (NCh in the acclimatized “clean room”. Next the tissues were
409). homogenized in an IKA Ultra Turrax T-25 homogenizer
considering demographic variables, which were associated stored to -25 º C until the moment of their wet mineralization
demographic variables were the following ones Table 2:
in the north area of the Antofagasta city (NA); mothers that applied by Welz and Melcher, et al. (33). Samples of not more
have always lived in the south central area of the Antofagasta than 1.000 g were allowed to be for one night with 10 mL of

Methods (brief)

Keywords: Multi-Metal Exposure Heavy Metal; Placenta; Umbilical Cord; Normal Born; Malformed Born; Atomic Absorption
Abbreviations: HGAAS: Hydride Generation Atomic of the heavy metals and the discrimination between the
Absorption Spectrometry; GFAAS: Graphite Furnace Atomic essential bioactivity of the trace element and their eventual
In anatomy, pathology, and physiology the human mainly under the form of dimethylarsinate (DMA) (23,24).
brilliant and translucent (19). Sample Groups
minerals through the placenta are based on the observation of 1992 116 placentas were collected with their segments of
beings), but alone in rats whose placentas are hemodicoriales samples from childbirths for caesarean operation and in
they have been described in detail (20). The human placentas those that metal forceps were used they were not collected.
element transfer through the placenta and their impact in collected with their segments of umbilical cord of newly
arsenic co-precipitation with Fe(III) oxo – hydroxides that of umbilical cord. All the samples were held with claps of
hydroxide. It is assumed that these plants would have surgical steel scalpels. Immediately later, the samples were
The mothers consented voluntarily to respond a survey surgical steel embedded in Teflon. Finally, the samples were
the region of Antofagasta, but that at least they have lived The mineralization of the samples was made for wet
in the north area of the Antofagasta city (NA); mothers that applied by Welz and Melcher, et al. (33). Samples of not more
Sampling and Sample Processing or 100 mL with deionised water in which were measured
samples for the trace element analyses began in the room subjected to an attack for semi – reflux after adding 500 µL
samples were properly labelled and then transported in a Placental Matrices of the NB Group Baby: Li was
until the moment of the analytic preparation of the samples. absorption spectrometry; Cr by means of hydraulic high

Implications

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Update history

The five most recent substantive edits to this page, classified major (evidence or structure moved), correction (a published value or statement was wrong and has been fixed), or minor (narrative rewritten without changing the underlying evidence). Each description is derived from what the edit did to this page; the linked commit is the authoritative record, routine regeneration passes are excluded, and the full version history lives in git. When DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.

Commit	Date	Change	Description
3171d06	2026-08-02	major	1 section added
bc84bfc	2026-08-02	major	6 sections added; narrative text revised