Electrolyte Imbalance Flashcards

1
Q

Causes of hyperkalaemia (7)

A

Renal failure
Drug (ACEi, trimethoprim, K-sparring diuretics, NSAIDs, BB)
Tissue breakdown (rhabdo, haemolytic, tumour lysis)
Metabolic eg DKA
Endocrine: Addisons
Diet
Spurious

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2
Q

Symptoms of hyperkalaemia

A

Weakness progressing to flaccid paralysis
Decreased reflexes
Paraesthesia

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3
Q

ECG changes in hyperkalaemia

A

1st degree HB
Flattened/absent p waves
Widened QRS
Tall tented t waves
ST depression
S and T merging (sine wave)
VT
Bradycardia

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4
Q

Risks of hyperkalaemia treatment

A

Hypoglycaemia
Tissue breakdown due to calcium
Rebound hyperkalaemia

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5
Q

Causes of hypokalaemia (6)

A

GI losses
Drugs (diuretics, laxatives, steroids)
Renal loss (renal tubular disorders, diabetes insipidus , dialysis)
Endocrine (Cushings, hyperaldosteronism)
Metabolic alkalosis
Magnesium depletion

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6
Q

Symptoms hypokalaemia

A

Fatigue, weakness, leg cramps, constipation
If severe: rhabdo, paralysis, resp difficulties

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7
Q

ECG features hypokalaemia

A

U waves
T flattening
ST changes
Arrhythmias

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8
Q

Causes hypercalcaemia

A

Hyperparathyroid
Malignancy
Sarcoidosis
Drugs

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9
Q

Symptoms hypercalcaemia

A

Confusion, weakness, abdo pain, hypotension, arrhythmia

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10
Q

ECG features hypercalcaemia

A

Short QT
Wide QRS
Flat T waves
AV block

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11
Q

Treatment hypercalcaemia

A

Fluid replacement
Furosemide
Hydrocortisone
Pamidronate

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12
Q

Causes hypocalcaemia

A

Renal failure
Pancreatitis
CCB overdose
Toxic shock
Rhabdo
Tumour lysis

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13
Q

Symptoms hypocalcaemia

A

Paraesthesia
Tetany
Seizures
AV block

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14
Q

ECG features hypokalaemia

A

Long QT
TWI
Heart block

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15
Q

Treatment hypocalcaemia

A

Calcium
Magnesium

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16
Q

Causes hypermagnesaemia

A

Renal failure
Iatrogenic

17
Q

Symptoms hypermagnesaemia

A

Confusion
Weakness
Resp depression
AV block

18
Q

ECG features hypermagnesaemia

A

Long PR and QT
T Wave peaking
AV block

19
Q

Treatment of hypermagnesaemia

A

Calcium
Ventilators support
Saline diuresis(saline + furosemide)
Haemodialysis

20
Q

Causes hypomagnesaemia

A

GI loss
Polyuria
Starvation
Alcoholism
Malabsorption

21
Q

Symptoms hypomagnesaemia

A

Tremor
Ataxia
Nystagmus
Seizures
Torsades de pointes

22
Q

ECG features hypomagnesaemia

A

Long PR and QT
ST depression
TWI
flat p waves
Wide QRS
Torsades de pointes

23
Q

Treatment of hypomagnesaemia

A

Magnesium sulfate

24
Q

Managing arrest in dialysis

A

Trained nurse to operate and remove dialysis machine
Return patients blood volume with fluid bolus
Can use dialysis access for drug treatment
Prompt management of hyperkalaemia