Hams Test
Haematology Overview / Directory
Purpose of the test
Description: Ham's test is used in the diagnosis of Paroxysmal Nocturnal Haematuria (PNH). PNH cells are more sensitive to complement lysis because of their increased capacity to bind complement. Due to the nature of this test it is recommended that analysis for CD55 is performed instead
Reference Range
Negative
Sample Requirements
3 mls EDTA blood and a 10 ml clotted blood sample.
Storage and Transport
EDTA blood can be several days old if kept at 4°C. Serum will need to be separated as soon as possible to avoid any lysis. The serum should be frozen until sent.
Turnaround Time
3 days
Time Limit for Extra Tests
Depends on tests required. Contact laboratory for further details.
Factors affecting results or interpretation
Recent blood transfusion.
Contacts
Tel 020 3299 9000 Laboratory Ext 2455 Office Ext 4337
