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. 2001 May;94(5):221–225. doi: 10.1177/014107680109400506

Box 1.

Current ‘clinical’ classification of renal tubular acidosis (RTA)

• Type 1: Distal RTA (most common)—‘complete’ and ‘incomplete’ (hypokalaemia common)
• Type 2: Proximal RTA
• Type 3: A poorly characterized mixture of 1 and 2 in infants and which may reflect an ‘immature’ renal tubule
• Type 4: Hypoaldosteronism (real or apparent)—‘distal-like’ with hyperkalaemia