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Anaesthetics > Use of IV fluids > Flashcards

Use of IV fluids Flashcards

1
Q

majority of body weight is?

A

water 60%

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2
Q

TBW?

A

42L

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3
Q

EXTRCELLULAR water/fluid =

intracellular water/fluid = ?

A

40%

20%

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4
Q

when giving IV fluid what are you targeting

A

extracelular fluids - PLASMA

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5
Q

interstitial fluid is

A

fluid in space between cells

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6
Q

Transcellular fluid is?

examples where it is found (2)

A

fills the cavities in the body lined by epithelium

aqueous humour in eye
CSF

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7
Q

water likes to diffuse from

A

dilute to concentrated when separated by SPM

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8
Q

what prevents osmosis from occurring

A

osmotic pressure

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9
Q

what is a solute

A

substance dissolved into another liquid

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10
Q

what is a solvent?

A

substance that can dissolve a solute

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11
Q

an osmole reflects?

A

conc of osmotically active particles in solution

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12
Q

daily requirements of water

A

30ml/kg

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13
Q

daily requirements of sodium

A

1-2 mol/kg

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14
Q

daily requirements of potassium

A

0.7-1 mmol/kg

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15
Q

daily requirement of glucose

A

50-100mg a day

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16
Q

what determines water distribution?

A

Only particles restricted to one of the compartment

17
Q

ECF gives

A

sodium (and accompanying anions)

18
Q

ICF gives

A

potassium and macromolecules

19
Q

what is hypotonicity

A

cell swelling

20
Q

what is Hypertonicity

A

cellular dehydration

21
Q

Symptoms of tonicity changes are ?

A

largely neurological

22
Q

swelling of cells causes?

A

raised icp, compromised cbf and herniation

23
Q

Shrinkage of cells causes?

A

ich venous sinuous thrombosis

24
Q

resuscitation someone - need fluid in?

A

intravascular space

25
Q

what stays mainly in the intravascular space?

A

crystallite or colloid

26
Q

how do we measure body fluids? - what do you use most often to assess ?

A

clinical measurement

27
Q

why should you never give over 100ml/hr regardless of weight ?

A

risk of hyponatraemia

28
Q

maintenance fluids - what you going to give?

A

0.18% NaCl/4% glucose/0.3% KCl

29
Q

what must you remember for resuscitation/replacement (2)

A

Urine output is a poor guide to fluid requirements

Oliguria does not always require fluid therapy

30
Q

replacement fluid go to?

A

PlasmaLyte 148

Upper GI losses: use 0.9% NaCl with KCl

Anaesthetics (5 decks)

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