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Acute renal failure

Prevalence
Causes
Clinical features
Investigations
Therapy
Prevention
Prognosis
Prevention

Contrast medium nephrotoxicity

Use low-osmolality contrast media a  particularly for high-risk patients

  • with pre-existing renal impairment a  
  • with diabetes b  
  • undergoing angiography b  

Give high-risk patients pre- and post-contrast

  • 0.45% saline (1 mg/kg/hr for 12 hours) c
  • acetylcysteine 600 mg twice daily a

Avoid

  • furosemide a  
  • mannitol   d  
  • metformin d
 

Antibiotics:  aminoglycosides

Avoid aminoglycosides d in patients with 

  • renal dysfunction (creatinine clearance >60ml/ min or rising creatinine) 
  • shock 

unless there is no good alternative. d

Estimate your patient's renal function when contemplating aminoglycoside treatment. d

Creatinine clearance > 60mL/min

  • Give aminoglycosides once a day (most commonly 4.5mg/kg of dose-determining weight)
  • Monitor levels during therapy and adjust dose intervals
  • Measure a trough level prior to the third dose. d If  > 2 µg/l, increase the dose interval or reduce the dose. d
  • Monitor creatinine levels during therapy (every 2-3 days minimum, more frequently if pre-existing renal dysfunction, shock or critically ill). d

Creatinine clearance < 60 ml/min

  • Adjust the dose or the dose interval according to the level of dysfunction and according to the clinical circumstances.
  • Monitor levels during therapy and adjust dose intervals
  • Measure a trough level prior to the second dose. d If  > 2 µg/l, increase the dose interval or reduce the dose. d
  • Monitor creatinine levels during therapy (every 2-3 days minimum, more frequently if pre-existing renal dysfunction, shock or critically ill). d

Aminoglycoside toxicity can manifest days after the last dose d

 

Critically ill

There is no clear benefit using from 

  • albumin d
  • prophylactic dopamine a   

Expiry date: July 2003
Levels of Evidence used in grading these guides

Authors   C   Clase , CM   Ball
Reviewer   S   Hsu
CAT Writers   C   Clase , CM   Ball