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 ?
In "Global trends in critical values practices and their harmonization," (6) Dr.
Laboratory critical values policies and procedures: a college of American pathologists Q-probe study in 623 institutions.
The relative proportion of critical values was highest in the emergency department in comparison with the relative distribution of annual POCG testing in other locations.
Analysis of laboratory repeat critical values at a large tertiary teaching hospital in China.
Each laboratory is responsible for establishing critical values policies in conjunction with local clinical opinion, review of laboratory practice and the relevant published literature.
6193 * MacKinnon critical values for rejection of hypothesis of a unit root.
In reporting critical values for inpatients, medical technologists generally call the floor where the patient is located.
The null hypothesis is rejected if the absolute value of the calculated ADF test statistics is greater than the absolute value of the Mackinnon critical value (1).
If critical values are reported by sampling date, conditions specific to that date may result in unusually low or unusually high critical values.
A key innovation in this paper is to recognize that one can derive an alternative recession signal--called model 2--from regime-specific critical values, [m.
5868 1 % Critical Value * 5 % Critical Value 10 % Critical Value * MacKinnon critical values for rejection of hypothesis of a unit root.