Table 3

Mean (basal conditions) and maximum (ischaemia) values for amino acids in patients with head injury using a CMA70 microdialysis catheter (10 mm membrane) perfused with Ringer's solution at 0.3 μl/min

Amino acid typeAmino acid nameBasal concentration μMSDIschaemia concentration μM
ExcitatoryGlutamate15.57.37230
Aspartate4.452.29112
InhibitoryGABA0.240.3635.7
Glycine69.926.1523
Taurine9.012.3172
Non-transmitterAlanine99.435.6273
Arginine26.914.7203
Asparagine25.56.7876.9
Citrulline4.241.9827.3
Glutamine1379409.83955
Histidine65.028.9163
Methionine19.85.43170
Phenylalanine48.120.5181
Serine53.920.2148
Threonine72.915.8218
Tryptophan9.304.4377.5
Tyrosine29.512.1100.3
Valine10950.0385