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Apoyado por:

Facultad de Medicina Facultad de Química

Facultad de Humanidades y Ciencias Sociales

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ó

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• •

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,

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Foto aérea 1950 www.skyscrapercity.com/showthread.php?t=54005

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blasapisguncuevas.blogcindario.com/2009/08/04.

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• • • Insituto Nacional de Estadística - Uruguay. www.ine.gub.uy/

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Técnica PbS

FAAS

- Resultados en tiempos más cortos,

- Permite trabajar con volúmenes mayores de muestra y las interferencias están bien documentadas.

Sistema de atomización presenta limitaciones ,puede afectar los límites de detección.

Requiere Personal

especializado.

Ventaja de poder trabajar con volúmenes mayores de sangre.

- Ventaja de poder trabajar con mayores volúmenes de muestra.

GFAAS Se toma como

método de referencia.

Buena sensibilidad ( permite trabajar con pequeños volúmenes de muestra)

Menor precisión y mayor número de interferencias.

Requiere Personal Especializado

- Ventaja poder trabajar con bajos volúmenes de sangre.

ASV

Util para screening primario.

Bajo costo de inversión inicial.

Menor capacitación técnica del personal.

Rapido

Para valores bajos ( 10 ug/dL ó menor), la precisión empieza a ser inadecuada.

Requiere controlar con referencias.

- Permite utilizar sangre por punción de dedo.

- Util para realizar screening primario en grupos grandes de población,

No es de uso recomendado

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Determinaciones de plomo ensangre en niños de 0 a 14 años

10 a 14 µg/dL; 915;

39%

hasta 9 µg/dL; 921;

39%

20 a 44 µg/dL; 159;

7%

45 y más µg/dL; 1;

0%

15 a 19 µg/dL; 355;

15%

Plombemias menores de 15 años

0

5

10

15

20

25

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Edad

Val

. m

edio

s µ

g/dL

Pb

en

san

gre

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la

misma

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Datos de las Estaciones de Monitoreo: Pb

0,00

0,25

0,50

01/03/01 01/04/01 01/05/01 01/06/01 01/07/01 01/08/01 01/09/01 01/10/01

Fecha

Plo

mo

(u

g/m

3)

Datos de las Estaciones de Monitoreo: PTS

0

50

100

150

200

250

01/03/01 01/04/01 01/05/01 01/06/01 01/07/01 01/08/01 01/09/01 01/10/01

Fecha

PT

S (

ug

/m3)

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Zona Rural

Zona Urbana

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1 De manera general, se define la biodisponibilidad de contaminantes en suelos como la fracción o porcentaje de la concentración total que está disponible para ser absorbida por cualquier organismo vivo.

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RETIRO MANUAL DE OBJETOS EXTRAÑOS Y VEGETACIÓN

SECADO 24 HORAS A 105 ºC

DISGREGACIÓN CON MORTERO

TAMIZADO MALLA < 2 mm

INGRESO DE LA MUESTRA AL LABORATORIO

HOMOGEINIZACIÓN DE LA MUESTRA

SACADO A PESO CONSTANTE DE UNA FRACCIÓN (50 g)

ALMACENAMIENTO

DIGESTION DE LA MUESTRA

ANALISIS

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51 14

19

15

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

Porcentajes de las muestras.

Urbana

Suburbana

Rural

Zonas

Distribución de muestras de suelo de distintas zonas según niveles de plomo

[Pb]<140 mg/kg 140<[Pb]< 400 mg/kg [Pb]>400 mg/kg

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Niveles de Plomo en Suelo en Asentamientos de Montevideo

11%

18%

71%

Muestras con nivel de plomo menor que 140 mg/KgMuestras con nivel de plomo entre 140 mg/Kg y 400 mg/KgMuestras con nivel de plomo mayor que 400 mg/Kg

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Fig. 16-17: Asentamiento Inlasa

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Fig. 21: Imagen aérea del asentamiento Isla de Gaspar.

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,

µ

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í

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EFECTOS

ÓrganosSistemasFuncionesDesarrollo

VULNERABILIDADFrecuencia respiratoriaPeso y masa corporalAbsorción dérmica y GIMetabolismoEn desarrollo,

inmadurez

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Cuadro 1. Evolución de la normativa referente a la exposición laboral a plomo. Uruguay

1936

1937

1941

1945

2004-2009

Saturnismo. Enfermedad profesional

Decreto sobre medidas Preventivas del Saturnismo: inspección periódica, Protección personal, controles médicos periódicos

Denuncia Obligatoria

Periodicidad de los exámenes médicos

Ley N° 17774, – Normas para la Prevención y Control de la Exposición al Plomo a Nivel Ocupacional.

Ordenanza MSP Vigilancia Sanitaria de Exposición a Factores de Riesgo Químico, 145/09 (Ex Ordenanza 337/04) Plombemia semestral , BEI 30ug/100ml

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é

ó

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µ

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xx

Plomo en sangre µµµµg %

Tiempo de permanencia de ese nivel

Efectos clínicamente detectables

80-100 Días o semanas Síntomas Neurológicos Centrales y PeriféricosSignos Gastrointestinales ( cólico saturnino)

60-80 Meses Síntomas Hematológicos ( Anemia) y Renales 40-60 Años Síntomas inespecíficos. Efectos Cardiovasculares : HTA< de 40 Años No detectables clínicamente.

Evidencia epidemiológica de efectos reproductivos, cardiovasculares y renales

Cuadro 2.- Correlación entre Plomo en sangre y permanencia de esa concentración en el tiempo.

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Cuadro 3.- Valores de referencia en diferentes regiones y organismos internacionales

España UE ACGIH USA

NIOSH USA

OMS

Valores límite de exposición

Pb-sangre µµµµ%

Pb-aire µµµµ/m3

70

150

70-80

150

30

50

60

50

35 (hombre) 10 (mujer en edad fértil)

ACGIH (American Conference of Governmental Industrial Hygienists); NIOSH (National Institute for Occupational Safety and Health); OMS (Organización Mundial de la Salud), UE (Unión Europea).

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El cuadro 4 muestra la variación histórica de los valores de referencia en Estados Unidos, en las últimas décadas.

Aire µg / m3

Sangre

Valores límites o admisibles establecidos por la Administración de Salud y Seguridad Ocupacional del Gobierno de EEUU(OSHA)

1979 200

1982 100

2008 30

60 µg %

--------

40 µg %

µ

µ

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á

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µ

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)

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n

(4)

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Plombemia y manifestaciones clínicas. (Tomado de Agency for Toxic Substances and Disease Registry. Case Studies in Environmental Medicine: Lead Toxicity. US Departament of Health and Human Services, Public Health Service; 2006).

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µ

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µ

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EVOLUCIÓN de la POBREZA por EDAD URUGUAY 2000 - 2005

010203040506070

2000

2001

2002

2003

2004

2005

Años

Por

cent

ajes

0 a 5

6 a 12

13 a 17

18 a 24

65 y más

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Fuente: UNICEF (2005) Observatorio de los derechos de la infancia y la adolescencia en Uruguay

Asentamientos irregulares

Resto del país

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141 133 156 165

69

31 11 4 0 10

50

100

150

200

250

N° d

e ca

sos

Rangos de Plombemia (µg/dL)

0 a 9.9 10 a 14.9 15 a 19.9 20 a 24.9 25 a 29.930 a 34.9 35 a 39.9 40 a 44.9 45 a 49.9 50 y más

N= 711

112 111

78

239

90

47

16 10 4 40

50

100

150

200

250

0 a 9.9 10 a 14.9 15 a 19.9 20 a 24.9 25 a 29.930 a 34.9 35 a 39.9 40 a 44.9 45 a 49.9 50 y más

N= 711

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