57721-3

LOINC code 57721-3 identifies "Reason for lab test in Dried blood spot". Definitions of answer codes for reason for newborn screen lab test in dried blood spot: Initial Screen: This answer code is used for the first screen performed on an infant after birth. When the first specimen obtained is of unacceptable quality and cannot be used, a replacement specimen is still considered the initial screen. When an initial screen is performed before 24 hrs because of a planned transfusion or an extremely ill infant, it is still considered the initial screen even though it may need to be repeated later. Subsequent screen - required by law: This answer code is used for mandatory second screens as required by law and assumes that the first screen was normal and that the second screen was performed only because it was mandated by law. For example, [give name of state(s)] currently performs a second screen on every infant born in the state at a particular point in time, such as between 1 and 2 weeks. The purpose of identifying the reason for a subsequent screen is that it will change the expected time interval when the subsequent screen should be performed. Subsequent screen - required by protocol: This answer code is used for subsequent screens that are performed because of clinical conditions in the newborn that require a repeat screen as specified by a protocol to assure valid test results. Many of these subsequent screens have abnormal or out-of-range results on the initial screen that can be explained by the clinical condition of the infant. Typical examples include premature infants, infants who receive blood product transfusions, and infants who are receiving intravenous alimentation. This category should not include abnormal tests that should be considered presumptive positives (which would require a diagnostic evaluation rather than a repeat screen by protocol). The purpose of identifying the reason for a subsequent screen is that it will change the expected time interval when the subsequent screen should be performed. Subsequent screen - for clarification of initial results (not by law or protocol): When the results of the initial screen are abnormal or out of range, many states perform an "immediate" repeat screen to confirm the results before considering the test a presumptive positive that will require a diagnostic evaluation. Many of these results may be considered or reported as equivocal or borderline until a clear abnormality is confirmed on the subsequent screen. This category does not include abnormal or borderline results for which there is a clear clinical explanation, such as prematurity, for which there is a clear protocol for obtaining a second screen. The purpose of identifying the reason for a subsequent screen is that it will change the expected time interval when the subsequent screen should be performed. Subsequent screen - reason unknown: The purpose of identifying the reason for a subsequent screen is that it will change the expected time interval when the subsequent screen should be performed. States should use this answer code if they are unable to identify the specific reason for a subsequent screen, but they are able to separate initial screens from subsequent screens. The reason for the second screen might be any of the above. A repeat initial screen because the first specimen was of unacceptable quality should not be considered a subsequent screen, but some states may use this code if they are unable to track that the reason for a second specimen was unacceptable quality of the first screen. No sample collected due to parental refusal: This answer code is used to document parental refusal of newborn screening so that a report can be generated which will contain no test results because no specimen was submitted. This will enable complete matching of newborn screening results to all infants born even if no laboratory testing was performed.

This code measures Reason for lab test in Bld.dot. It belongs to the MISC class in the LOINC classification.

LOINC (Logical Observation Identifiers Names and Codes) is a universal standard for identifying laboratory and clinical observations. It is maintained by the Regenstrief Institute and used worldwide for health data exchange.