cortezasuprarenalterapianutricia
TRANSCRIPT
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ALTERACIONES DE LA CORTEZA SUPRARENAL
TERAPIA NUTRICIA
Dr. Eliseo Berdeal F.
†
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POSICIÓN
FORMA
TAMAÑO
CONSISTENCIA
COLOR
IRRIGACIÓN
INERVACIÓN - SNA
ANATOMÍA
3 – 5 g.
3 - 5 x 2 – 3 cm x 4-8 mm
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EMBRIOLOGÍAREGIÓN TORÁCICA
REG. CVERVICAL
REG. LUMBOSACRA
SIMPATOGONIOS
CORTEZA FETAL
5ª SEMANA
EPITELIO
CELÓMICO
CRESTA
NEURAL
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GLÁNDULAS DE MARCHAND PARAGANGLIOMAS
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C
O
R
T
E
Z
A
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HISTOLOGÍA
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15 %
65 %
7 %
CÉL CILÍNDRICAS
ARCOS / ALDOST
N - Ka – H O
PRESIÓN ARTERIAL
CÉL POLIÉDRICAS
FASCÍCULOS
┴ SUPERFICIE
CORTISOL
METAB. CBH-LIP-PROT
CÉL POLIÉDRICAS
CORDONES / RED / DHEA
SINTESIS LIBERACCIÓNNO ALMACENAMIENTO
13 %
PM
LIPOFÍLICAS
2
CÉL POLIÉDRICAS
CORDONES / A ( 80 % ) – NA
SNA - SIMPÁTICO
90%
10%
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HORMONAS
ESTEROIDEAS
HORMONAS
CATECOLAMINAS
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SISTEMA RENINA
ANGIOTENSINA - ALDOSTERONA
MECANISMO REGULADOR ALDOSTERONA
REABSORCIÓN Na
CAPA GLOMERULAR
NO TIENE P450c17
20% CBG
42% ALBÚMINA
37% LIBRE
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VOLUMEN
SANGUÍNEO
HEMORRAGIA
RETIENE
Na – H2O
TÚBULO
CONTORN
PROX
GLOMÉRULO
INTESTINO
GLÁD.
SALIVAL
GLÁD.
SUDORÍPARA
CIRCULACIÓN
SANGUÍNEA
A
L
D
O
S
T
INCREMENTO
VOLUMEN
SANGUÍNEO
AUMENTA
EXCRECIÓN
K – H+
INCREMENTO
Na – H20
EXTRACELULAR
MANTIENE
PRESIÓN
ELEVADA
FACTORES
RENALES
RENINA
ANGIOTENSINA 1
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5-10% LIBRE
75-80% CBG
15% ALBÚMINA
SINTÉTICOS NO SE UNEN
PREDNISOLONA
NEOGLUCOGÉNESIS
PROTEÓLISIS
LIPÓLISIS
1-
3-
INHIBE FIBROBLASTOS COLÁGENO
CICATRIZACIÓN
INHIBE OSTEOGÉNESIS OSTEOCLASTO
OSTEOPOROSIS
2-
DISMINUYE LY – EOS – MONOCITOS
PMN MIGRACIÓN
ANTI INFLAMATORIO / INMUNOSUPRESORNO TIENE P440 aldo
ZONA FASCICULAR - RETICULAR
METABOLISMO
4-
RETENCIÓN Na / EXCRECION K
TA - TFG
INHIBE TRH – TSH – T4 / LH
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INCREMENTA
EXCITABILIDAD
NEURAL
ACCIÓN ANTIINFLAMATORIAACCIÓN ANTIALÉRGICA
DISMINUYE
ANTICUERPOS
MANTIENE TONO / TA
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PSEUDOPUBERTAD PRECOZ TRAST. ELECTROLITOS DAÑO RENAL
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CORTISOLp
8:00a.m.
12:00a.m.
10-25μg/dl
< 7.5μg/dl
75% VN a.m.20:00
CORTISOL u24h< 70μg/m2 / 24h
120μg / 24h ( RIA)
ALDOSTERONA p <12 ng/dl)
ALDOSTERONA o24h < 17μg/24h
CICLO SUEÑO-VIGILIA
STRESS
DIETA – AYUNO 12h a.m.
FÁRMACOS
MUESTRAS EN HIELO
RENINA ANGIOTENSINA 2h REPOSO
ACTH p
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VALORA CAPA FASCICULADA INSUF ADRENAL PRIMARIA / HPAC
250μg
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UTILIDAD DX ≠
CUSHING HIPOF
ADRENAL
ECTÓPICO
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DESCARTA AUTONOMÍA ANORMAL
HIPERFUNCIONALIDAD?
Nugent
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DISMINUCIÓN
NEOGLUCOGÉNESIS
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ADRENALECTOMÍA
LAPAROSCÓPICA
HIDROALTESONA
INSUF ADRENAL 2ª
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