to investigate the value of plasma secretin determination in the diagnosis of impaired gastric secretion , blood samples were drawn for secretin assay ( radioimmunoassay ) at specified intervals before and after pentagastrin stimulation in 10 healthy volunteers and 11 subjects with suspected hypo- or achlorhydria ( less than 10 meq hcl/2 h ) .
C0030859
pentagastrin
C0001075
achlorhydria