Alveolitis alérgica
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RINCÓN BALLINAS FELIPE
ALVEOLITIS ALERGICA EXTRINSECA
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La alveolitis alérgica extrínseca es un trastorno
inflamatorio que abarca las paredes alveolares y vías
respiratorias terminales inducida por la inhalación
repetida de diversos elementos orgánicos en un
hospedador susceptible.
Definición
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Etiología
antí
gen
o microorganismos
Proteínas animales
Comp. químicos
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Clasificación
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JAPONESES
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HONGO
TRICHSPORON
CUTANEUM
VIVIENDAS.
TIPO VERANO.
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8 -30 % de los miembros.
.5 a 5% pulmón del granjero
Epidemiología
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Predominio 80 a 95% en no fumadores
#FumarUnChingo
Epidemiología
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AG 1-5 mc AUMENTO DE LOS LINFOCITOS CITOTOXICOS CD 8
GRANULOMA!!!
FORMMACION DE INMUNOCOMPLEJOS Ag- IgG
MQ SECRETAN QUIMIOCINAS Y CITOQUINAS
PRODUCCION DE ACS. ESPECIFICOS IgG
ACT. CASCADA DEL COMPLEMENTO C5—> ACTIVACION MQ
ATRAEN NEUTROFILOS, LINF, MQ--- INDUCEN DIFER. LINF CD4, Th0 A Th1
IFN G
FISIOPATOGENIA
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1. TIEMPO DE EXPOSICION.
2. CANTIDAD DE AG.
CLASIFICACION CLX
• Agudo
• Subagudo
• crónico
CUADRO CLINICO
GENETICO
PROP. AG.
AMBIENTAL
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Clasificacion de Selman
Act. No progres e interm.
aguda prog. E
inter
Cronica prog y
no prog
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Aguda
6-8 hrs de expo.
Desaparece en dias
Fiebre, mialgias
Expo. corta pero alto contenido en ag
Tos no productiva
Calosfrios, cefalea
Disnea, estertores silbilantes✓
✓
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✓
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subaguda
Presentacion gradual sem
Requiere tratamiento
Progreso a cianosis y disnea intensa
Hospitalización
Exp. Prolog. Baja dosis. Tos, disnea
Puede agudizarse
Disnea, estertores silbilantes✓
✓
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✓
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✓
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Crónica
Exp. prolongada
Sintomas durante meses o años
Dedos en palillos de tambor
Insuficiencia cardiaca
Indistingible con fibrosis
Dependecia de O2
Perdida de peso, anorexia✓
✓
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Diagnóstico
HALLAZGOS DE LABORATORIO
• aum. Vel. De sedimentación eritrocitaria
• Proteina C reactiva
• Leucocitosis en sangre periferica con neutrofilia
DETECCION DE PRECIPINITA ESPECIFICA (NO
CONFIABLE)
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RxNormal después de la resolución
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Biopsia
1 Infiltrado alveolar e
intersticial.
Granulomas no
caesificante, bronquitis
obliterante
Templates
3 #PonmeAtención ¬¬
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Neumonitis intersticial
Granulomas no caseificantes
Fibrosis intersticial, panal de abeja y
bronquitis obliterante
Dx
2
Crónico
subagudo
agudo.
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Pruebas de funcionamiento pulmonarDx.
Alteración
en la cap.
De difusión
Disminución
de vol. pulm
Patrón rest
y obst.
Dis en la
distensibilidad
.
hipoxemia
Broncoespas
mo e
hiperactiv.
bronquial.
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• Acs precipitantes 40-50% es +
asintomático.
• Prueba de provocación bronquial:
– Falta de estandarización
– Dificultad de interpretar los datos.
Dx.
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CRITERIOS MAYORES CRITERIOS MENORES
Evidencia de exposición al ag. Estertores bibasales
Síntomas compatibles Dis. En la capacidad de difusión
Hallazgos compatibles en Rx o TC Hipoxemia arterial
Cambios histológicos compatibles
Estimulo natural positivo
Linfocitosis en el lavado bronquio-alv
Criterios de Schuyler & carmier
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Dx Diferencial
3 Sarcoidosis (linf CD4, infil. Distal y prox.)
Fibrosis pulmonar idiopatica (neutrofilos)1
Sd. Toxico del polvo orgánico (previa sensibilización, p.
Rx )2
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Tx
Prednisona:
1 mg/kg/dia
7 a 14 días
Templates
Tx
preventivo
curativo
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Tx
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1 tThis is an example text. Go
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32
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Px
De reserva
bueno
malo
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GRACIAS!!! (equis de)