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Hi Tim
 
I would have thought the only way to resolve this issue would be to compare haemoglobin levels from the portable blood gas analyser against your laboratories haemoglobin measurements. After all what is a measured haemotocrit apart from the classical method which involves high speed centrifugation of the whole blood and measurement of the ratio of packed red cell expressed as a fraction of the initial volume of blood.
 
cheers
 
Trevor
 
"Come on Manchester get in behind global warming and grow your own bananas"

Trevor Walmsley,
Senior Scientific Officer (www.hospitalscientists.org.nz)
Canterbury Health Labs, Christchurch, New Zealand.
Phone: (0064 3) 364 0326 Fax:Phone: (0064 3) 364 0320
eMail: [log in to unmask]
Internet:  www.cdhb.govt.nz/chlabs/staff/trevorw.htm

From: Clinical biochemistry discussion list on behalf of Hogan, Tim
Sent: Sat 18/09/2010 4:08 a.m.
To: [log in to unmask]
Subject: Measured vs Calculated Haemoglobin

We are looking at portable blood gas analysers for use in the community, most of the smaller ones which use disposable cartridges measure haematocrit and calculate haemoglobin.  What are the errors or asumptions in the calculation of haemogobin using measured haematocrit, and are they clinically relevant when applied to further calculated parameters such as  oxygen saturation.
 
Tim.
 

Tim Hogan

Laboratory Manager

Clinical Biochemistry

Basildon and Thurrock University Hospitals
NHS Foundation Trust 
 0845 155 3111 Ext 3036

[log in to unmask]

 www.basildonandthurrock.nhs.uk

 

 
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------ACB discussion List Information-------- This is an open discussion list for the academic and clinical community working in clinical biochemistry. Please note, archived messages are public and can be viewed via the internet. Views expressed are those of the individual and they are responsible for all message content. ACB Web Site http://www.acb.org.uk Green Laboratories Work http://www.laboratorymedicine.nhs.uk List Archives http://www.jiscmail.ac.uk/lists/ACB-CLIN-CHEM-GEN.html List Instructions (How to leave etc.) http://www.jiscmail.ac.uk/