Carboxy Haemoglobin

Yes. Please email your request to Imperial.nwlpcustomerservice@nhs.net

Results are communicated to clinical staff and are normally not communicated direct to patients either on telephone requests or in written report. If you need to contact us please click here to view the contact details page

Please contact the Customer Service Team Monday to Friday from 8:30am – 6:00pm on 0203 313 5353. Alternatively, see the Pathology User Guide for how to contact the relevant department. If advice is not urgent you can also email your query to Imperial.nwlpcustomerservice@nhs.net

Additional tests may be added by discussion with the relevant laboratory. The time limit for adding additional tests to a sample already received in the laboratory will depend on the type of sample and the department it was sent to.

Information on the repertoire of tests performed by pathology, including reference ranges, turnaround times and specimen requirements, can be found in the test directory.

Please click here for critical phoning limits for clinical biochemistry

Different tests have different sample stability requirements. If a comment on results indicates that the sample was delayed, the links below will indicate which tests may have been affected. This information is for serum or plasma samples.

For some tests, the impact of delay is consistent and these are marked with an arrow:

↑ indicates tests where delayed centrifugation results in falsely elevated results and the true level is likely lower than that reported.

↓ indicates tests where delayed centrifugation results in falsely lowered results and the true level is likely higher than that reported.

If there is no arrow, the true level may be lower or higher than reported.

Please interpret results with caution and consider the impact of any uncertainty.

The comment on the report will state how delayed the sample was. Please click the relevant link  below to see which other tests may have been affected.

Phlebotomy services are not managed by NWLP. For further information please see:

Imperial College Healthcare Trust Phlebotomy services

Chelsea and Westminster Hospital NHS Foundation Trust Phlebotomy services

The Hillingdon Hospitals Trust Phlebotomy services

NWLP operates UKAS accredited medical laboratories as per the references below. The current scope of accreditation for all NWLP’s laboratories can be found on the UKAS website.

UKAS accredited medical laboratory/medical diagnostic service:

• Clinical Biochemistry No. 8673
• Haematology and Blood Transfusion No. 8674
• Infection & Immunity Sciences (Including Immunology, Virology, Microbiology and Histocompatibility and Immunogenetics ) No. 8659
• Cellular Pathology (Including Histopathology, Cytology and Molecular Pathology) No. 9615

If you require copies of our certificate of accreditation and associated documentation please contact Imperial.nwlpcustomerservice@nhs.net.

UKAS requires the laboratories to be accredited for a particular repertoire/scope (ISO15189), any changes or additions to repertoire require assessment by UKAS (extension to scope).

The BD Hospital Tube Guide, BD GP Tube Guide and BD Paediatric Tube Guide provide visual references to the correct tube types and collection instructions.

Blood Tube Guide – Paediatric and Adult Equivalents

Home testing

INSTRUCTION SHEET FOR BLOOD SAMPLE COLLECTION 

We also have two instruction videos available (one with subtitles and one without) – please click on the links to view the videos on Google.

VIDEO ON BLOOD SAMPLE COLLECTION (without subtitles)

VIDEO ON BLOOD SAMPLE COLLECTION (with subtitles)