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In-vivo tests

These tests, ideally, must be carried out by appointment. Please telephone 020 7307 7383 for details, information for patient preparation, and appointment times. Sample-taking fees for Extended tests are charged per visit.


Extended Testing

  • 50g liquid glucose is consumed for the glucose challenge test/Mini-GTT.
  • 75g liquid glucose is consumed for all other glucose tests.
  • Each sample tube must be labelled with time of collection.


Glucose tolerance tests

Test name
Glucose Challenge Test/Mini-GTT
Glucose Tolerance Test (Extended Plus)
Glucose Tolerance Test (Extended)
Glucose Tolerance Test (Short)
Glucose Tolerance Test/OGTT
Glucose Tolerance with Growth Hormone


Extended tests

Test name
Lactose Tolerance Test
Synacthen Stimulation Test


Antibiotic Assays

Test name
Amikacin Level (State dose)
Gentamicin Assay
Glucose Tolerance with Insulin
Metronidazole Level
Teicoplanin Assay
Tobramycin Assay (Provide Clinical Details)
Vancomycin Hydrochloride

Lead consultant

Dr Frank Geoghegan