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Investigations

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

Investigations in this condition include:

Urine sample:

  • bright red urine implies that it is not likely to be post streptococcal glomerulonephritis
  • dipstick reveals blood and protein, but not more than two plus
  • microscopy reveals red cell casts, but no protein casts or hyaline casts
  • culture and specificity is needed also

Blood:

  • full blood count, with differential
  • ESR and CRP
  • collagen vascular disease screen
  • VDRL
  • biochemistry - urea raised, sodium and bicarbonate lowered, potassium normal or raised
  • antistreptolysin O titre
  • viral status, especially HIV
  • complement - depressed C3

Imaging:

  • chest radiology if there is pulmonary oedema
  • abdominal ultrasound

ECG:

  • if there is a raised potassium

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