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Terapia antianémica y factores crecimiento HP Flashcards

(21 cards)

1
Q

Tratar sobredosificación/intoxicación con Fe

A

deferoxamina

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2
Q

Tipo de anemia que produce falta de ÁF y vit.B12

A

anemia megalobástica

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3
Q

Anemia perniciosa

A

an. megaloblástica por déf.B12 por atrofia gástrica

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4
Q

Forma activa de ácido fólico y función

A

Tetrahidrofolato; síntesis de DNA y purinas

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5
Q

Proceso de activación de los folatos

A

En sangre en forma de N-metiltetrahidrofolato (5-metil-THF) + B12 (cobalamina)-> tetrahidrofolato + metilcobalamina

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6
Q

Consecuencias déficit de B12 (metilcobalamina)

A

No tetrahidrofolato (no se desmetila) -> anemia megaloblástica

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7
Q

Necesidades diarias de ÁF

A

200µg/día; embarazadas 400-600µg

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8
Q

Déficit de folatos (4)

A
  • Inh. de dihidrofolato red. (Metrotrexato)
  • Fenitoína, Fenobarbital (cat. á.f.)
  • Alcohol
  • Déficit enzimático
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9
Q

Déficit de ÁF y embarazo

A

Asociado a anencefalia y espina bífida

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10
Q

Función de desoxiadenosil cobalamina

A

Síntesis de mielina -> déficit: neuropatía

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11
Q

Necesidades diarias de B12

A

1-5µg

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12
Q

Absorción de B12

A

Unida al FI (factor intrínseco) en íleon terminal

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13
Q

Déficit de B12 por fármacos (2)

A

Metformina

Omeprazol

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14
Q

Dos orígenes anemia megaloblástica

A
  • Déficit de B12

- Déficit de Folatos

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15
Q

Epoetinas de primera generación

A

alfa-EPO y ß-EPO (misma secuencia- adm. 3 veces por semana y luego 1 ps. para mantener)

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16
Q

EPO de segunda generación

A

darbepoetina (una secuencia de CH en su estructura -> dura más; adm. 1ps. o cada 15 días)

17
Q

EPO de tercera generación

A

metoxi-polietilenglicol ß-epoetina (menos alergias y dura más-una vez al mes)

18
Q

Límite de Hb en sangre

19
Q

RRAA tratamiento con EPO (5)

A
  • HTA
  • Tromboembolismo
  • Hipersensibilidad
  • Aplasia pura de células rojas mediadas por AC (adm. subcut.)
  • factor de crecimiento-> crecimiento de tumores
20
Q

Estimulantes de las colonias de neutrófilos

A

fármacos acabados en -grastim

21
Q

Fact. de crecimiento de plaquetas o megacar.

A

Agonistas del receptor de trombopoyetina:

  • romiplostim (poco uso; IV)
  • eltrombobag (oral)