during the slow infusion of hypertonic nahco3 , a urinary threshold of hco3- ( thco3 ) appeared at a mean plasma level of 18.9 meq/liter , but as plasma hco3- increased progressively , its renal reclamation was almost complete and there was no evidence of either splay or tubular maximum , even when filtered loads of hco3- reached 5 meq/min .
C0074722
nahco3
C0005367
hco3