## What labs are critical?

Almost all laboratories included the following analytes on their critical-test list: sodium, potassium, glucose, calcium, hemoglobin/hematocrit, white-cell count and platelet count. In addition, positive blood and CSF culture results were deemed a critical value in nearly all laboratories.

**What is a critical result?**

A Critical Value / Critical Result is defined as A value/result that represents a pathophysiological state at such variance with normal (expected values) as to be life-threatening unless something is done promptly and for which some corrective action could be taken.

**What do critical lab values mean?**

“Critical values” are defined as a laboratory results at such variance with normal as to represent a pathophysiologic state that is life-threatening unless some action is taken in a very short time and for which an appropriate action is possible.

### How soon should critical results of tests be reported?

All critical values should be successfully reported to a responsible physician or registered nurse within 30 minutes of the time the value is known in the laboratory. In all cases delayed beyond 30 minutes, the cause for the delay should be documented.

**What is the critical value of calcium?**

Critical Value Chart

CHEMISTRY-ADULT* | |
---|---|

TEST | CRITICAL VALUE |

Calcium | <6.0 and >13.0 mg/dL |

Capillary pO2 | <35 mmHg |

Carbamazepine | >12 mcg/mL |

**What is critical H and H?**

Hematocrit is the percentage of red cells in your blood. Normal levels of hematocrit for men range from 41% to 50%. Normal level for women is 36% to 48%.

## What is the critical value for calcium?

**What is a critical value for Alt?**

There are no critical call back values for ALT. For this study we will early report results if ALT is greater than 90 IU/L.

**What is potassium critical value?**

Potassium is a chemical that is critical to the function of nerve and muscle cells, including those in your heart. Your blood potassium level is normally 3.6 to 5.2 millimoles per liter (mmol/L). Having a blood potassium level higher than 6.0 mmol/L can be dangerous and usually requires immediate treatment.

### What is considered a critical WBC count?

Critical Values

Test | Critical Values |
---|---|

Hemoglobin, OB | <7.5 |

Platelets | <20K >1M |

Platelets, newborn | <60K |

WBC | <1.0K >50K |

**What is the critical value in statistics?**

A critical value is the value of the test statistic which defines the upper and lower bounds of a confidence interval, or which defines the threshold of statistical significance in a statistical test.

**What is the appropriate critical value?**

The appropriate critical value will be selected from the t distribution again depending on the specific alternative hypothesis and the level of significance. The third factor is the level of significance. The level of significance which is selected in Step 1 (e.g., α =0.05) dictates the critical value.