Líquidos y electrolitos Flashcards

(17 cards)

1
Q

Distribución agua corporal total

A

intracelular 60%
extracelular 40%

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2
Q

Distribución de agua depende de

A

Fuerzas osmóticas.
Na+ extracelular
K+ intracelular

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3
Q

Disnatremias

A

Balance hídrico alterado

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4
Q

Pérdida de K intracelular

A

Pérdida renal o digestiva

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5
Q
A
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6
Q

Regulación de la osmolalidad por medio de

A

Osmorreceptores hipotalámicos
Estímulo de sed
Excreción hídrica por ADH, hipófisis posterior

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7
Q

Regulación de volúmen

A

seno carotídeo, la arteriola aferente y las aurículas

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8
Q

Excreción urinaria de Na es importante porque

A

hiponatremia por pérdida neta de Na+ o por depleción de volumen -25 mEq/l

hiponatremia por expansión o retención de volumen deberı ́a ser superior a 40 mEq/l.

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9
Q

Fórmula para valorar si la orina está concentrada o no

A

si la suma de Na y K urinarios es mayor a la del sodio sérico

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10
Q

En cuanto a la hipernatremia, si se produce en la neurona causa
(+150 mEq)

A

Letargia, hiperreflexia, temblor, convulsiones y coma.

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11
Q

2 mecanismos ante la hipernatremia

A

hiperreflexia, temblor, convulsiones y coma.

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12
Q

Presión osmolar

A

280 y 290 mosmol/kg

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13
Q

Tratamiento hipernatremia

A

Déficit de H2O= 0.6 x peso corporal(kg) x [Na+] p actual/ [Na] (p deseado -1)

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14
Q

Disminución de Na recomendada

A

0,5 mEq/l/hr 12 mEq/l/día

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15
Q

Hiponatremia (no puede producirse si no hay aporte de H2O)

A

-135 mEq/l

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