critical value


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critical value

Critical results Lab medicine A lab result from a Pt that must be reported immediately to care provider, which may require urgent therapeutic action. See Decision levels.
Critical values in the laboratory
Chemistry
Analyte  SI units US units
Calcium < 1.65 mmol/L  < 6.6 mg/dl
   > 2.22 mmol/L   > 12.9 mg/dl
Glucose  < 2.60 mmol/L  < 46 mg/dl
       > 26.9 mmol/L   > 484 mg/dl
K+  < 2.8 mmol/L  < 2.8 mEq/L
    > 6.2 mmol/L  > 6.2 mEq/L
      > 8.0 mmol/L if hemolyzed
Na+   < 120 mmol/L  < 120 mEq/L
      > 158 mmol/L  > 158 mEq/L
CO2 –plasma  < 11 mmol/L  < 11 mMol
   > 40 mmol/L  > 40 mMol
Hematology, eg blasts or sickle cells on peripheral smear, may indicate leukemia or sickle cell anemia
Microbiology, eg positive gram stain or culture from blood, serosal fluids or CSF, acid-fast stain or positive mycobacterial culture results
Transfusion medicine Incompatible cross-match, positive VDRL

critical laboratory value

, critical value
A test result obtained from a clinical specimen that is so far outside the normal range that it is likely to indicate an acute risk to the health of the patient.
Synonym: critical result
References in periodicals archive ?
The reader can purchase GP478 for $140 to learn three suggested nomenclature categories (critical-risk results, significant-risk results, and alert thresholds) and consult Appendix B therein for CAP Q-Probes critical values (renamed "alert thresholds" in a tabular summary in SI units) or access the same data free in reference.
Laboratory critical values policies and procedures: a college of American pathologists Q-probe study in 623 institutions.
14-16) Because of the high volume of POCG testing and clinical impact in hospital and emergency department settings, it is important to understand factors that affect test performance in the critical value range.
Study of variables affecting critical value notification in a laboratory catering to tertiary care hospital.
As explained earlier when the ADF observed value is less than the critical value, it means that data is of 1st order.
Table 1 summarises the critical value policies of the laboratories surveyed.
The ALERTS system captures the outgoing HL-7 result and, if the result fulfills the critical value criteria defined in Table 1, sends a critical value alert via the text pager system.
Use of values at the lower end of this range for a critical value would be more appropriate when minimizing excess soil N[O.
If one chooses the critical value to maximize the in-sample fit, then out-of-sample confirmation of recession forecasting models becomes particulary important, given Robert Lucas's dictum: Beware of econometricians bearing free parameters.
5868 1 % Critical Value * 5 % Critical Value 10 % Critical Value * MacKinnon critical values for rejection of hypothesis of a unit root.
N], we obtain the [delta]% critical value, which is [[Q.