Critical values are potentially life-threatening laboratory results that must be conveyed immediately to the physician or other healthcare professional so that therapeutic measures can be instituted rapidly. Main Line Health Laboratories (MLHL) maintains critical values for routine laboratory studies, therapeutic drug monitoring, microbiology testing and blood bank results.
When a critical value is encountered, MLHL automatically repeats the test in question. Once the critical value is verified, we will report the value to your office, usually by telephone. If an answering service is reached, we will inform them that you have a critical laboratory result, provide the patient's name and request that you contact our testing facility. If your answering service is authorized to accept critical values, the result will be left with the service. Communication of critical values is documented on the patient's laboratory report. If your office uses an answering machine after the close of business and no physician can be reached, MLHL will leave critical results on the answering machine and follow up the next working day.
For more information, call 1.866.CALL.MLH.