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----- Original Message -----
From: [EMAIL PROTECTED]
Sent: Tuesday, 2004-08-17 16:33
Subject: FW: pints of blood Dear Euric,
Thank you for your email inquiry regarding the measurement of a pint of blood.
In the scientific community there was by necessity a need to have standardization of units of measurements, hence the metric system. The system was developed in Europe long ago. The blood banking community follows the European metric system meaning that a unit of blood is 450 mls.
We communicate this as a �pint� to explain the 450 mls since we are not a country that universally follows the metric system and a pint is easier to understand. Yes a blood donation is slightly less than a pint.
Again, thank you for your inquiry.
Rosemary Leyland Director, Corporate and Community Development � American Red Cross Blood Services Penn-Jersey Region (Voice: 215-451-4051 (Cell: 1-215-687-8690 Fax: 1-215-451-2546
-----Original
Message-----
If I donate a pint, how much blood am I really donating?
The collection bags hold 450 mL of product. The standard US pint is 473 mL. When you say pint, do you mean 473 mL or the 450 mL the bag holds. What means do you use to measure a pint?
When you say gallon, do you mean 3.785 L based on a 473 mL pint, or do you mean 3.6 L, based on the 450 mL capacity of the bag?
Below you mention a donor who has given 24 gallons. How much did he actually give? Based on the standard definition of the gallon, that would be 91 L. Based on the amount of blood held in the bags, that would be about 86.5 L. That is a 4.5 L difference in the two meanings.
I'm just curious to know how you determine the amount of blood in a pint and gallon.
Thanks,
Euric | |||||||||
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