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 ?
A number of publications have described critical values lists in a single institution, (4,5,8) but more recently, publications have described experiences from a number of institutions.
In summary, 1) critical values should be set jointly between clinicians and the lab; 2) exceptions to calling based on clinical conditions may be defined, but this should be done as part of the joint process, and it should be part of a well defined policy; 3) physician-specific critical values should not be permitted; and exception for the convenience of a physician or nurses should not be permitted.
Use linear interpolation to estimate the critical values that fall between tabled values of [Sigma]/bar[c].
We are pleased to introduce a new consultant this year: The Critical Values for Therapeutic Drug Levels table, found on page 12, was reviewed by Catherine A.
Each laboratory is responsible for establishing critical values policies in conjunction with local clinical opinion, review of laboratory practice and the relevant published literature.
When the term critical value/diagnosis was used in the survey, nonpathologists were significantly more likely (49%) to consider the choices in the survey critical values compared to pathologists (12%, P < .
When we compare the Wald statistics calculated from the data with the more conservative critical values from our Monte Carlo distributions (shown in parentheses in the bottom panel), we still find that 24 of the 44 are larger than the 10 percent critical values.
The critical values for the finite sample size of the data set used in this paper are obtained by Monte Carlo simulation.
Although arbitrarily chosen, the number of collected critical values was set high in an effort to have a reasonable chance of identifying outliers and false or erroneous results.
He added two sentences to his commentary this year that we found instructive and interesting: "It is worth noting that the Joint Commission still lists critical values reporting in the January 1, 2013, set of National Patient Safety Goals for hospitals.
Communicating critical values in anatomic pathology.
We can start with understanding how information supplied by the Gram stain is reported on the Critical Values Telephone Call when we report initial positive blood cultures.