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The extent of validation depends entirely on your software's ability to use the error detection and prevention built into ISBT 128 and the SOPs you have in place to use bar code reading. When the software is merely ISBT 128-compatible, validation is quite simple. By ISBT 128-compatible, we mean that the system has allowed for the larger fields used for ISBT 128 data structures, but has not incorporated validation of the input using the data identifiers. For example, in some systems the ABO/Rh, expiration date and product description codes can be entered into any field. If more sophisticated software is used, the data identifier does not allow an ABO/Rh result to be entered into a unit number field. In many countries, regulators will require documented evidence that such process controls have been validated.
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