17.1 Reports, Abnormal Results, and Critical-Value Notification

CMLA Work Area IV (Patient Test Management, Communications, and Foundations) is 36 items, or 18.0% of the 200-question exam. Competency 12 is clerical skills, communications, and interpersonal relations. This section covers IV.12.A—chart or file laboratory-generated reports properly, including what constitutes a complete and final report and how abnormal results are reported and documented—and IV.12.G—acknowledge, report/notify, and document critical values, understanding their significance. A Certified Medical Laboratory Assistant (CMLA) gets the right report into the right record and escalates life-threatening numbers per the standard operating procedure (SOP). You do not independently diagnose the patient from a flag.

Quick Answer: A complete, final report identifies the patient, the test, the result with units, a reference interval, collection and report times, the performing laboratory, and specimen comments, and it is released by authorized testing personnel. Abnormal means outside the reference interval and follows the usual report path. A critical (panic) value is an imminently life-threatening result that must be acknowledged, called to an authorized person, read back, time-stamped, and documented. Do not leave criticals on voicemail. Assistants notify per SOP; they do not independently diagnose.

What constitutes a complete and final report

Clinical Laboratory Improvement Amendments (CLIA) rules at 42 CFR 493.1291 require an accurate reporting system and a test report that supports positive patient identification. At CMLA level, treat a complete report as one that includes:

• At least two patient identifiers (full name plus date of birth or medical record number)
• A unique accession or specimen identifier
• The name of the test performed
• The result with units of measure, or a qualitative interpretation such as reactive/nonreactive
• Reference intervals when they apply
• Specimen source when it matters (urine, serum, wound, left arm)
• Date and time of collection and the report date (and time when the SOP records it)
• The name and address of the laboratory location where the test was performed
• Comments about unacceptable or compromised specimens (hemolysis, lipemia, quantity not sufficient (QNS), unlabeled)
• A clear status: preliminary, final, or corrected

A final report has been reviewed and released by authorized testing personnel. An analyzer printout on the bench, a pending queue in the laboratory information system (LIS), or a sticky note with a number and no units is not a final report. Do not chart it as if it were.

Preliminary reports (common on microbiology cultures) must stay labeled preliminary. Do not file a prelim as the last word. When the culture is completed, the final report replaces or supplements it. A corrected report documents the original value, the corrected value, the reason, who made the change, and when. If the original result already reached the chart or was called as critical, notify the same authorized recipient of the correction.

Chart or file without mixing patients

Chart or file means the right report reaches the right legal record. In paper systems, laboratory reports go in the designated laboratory section of the chart, in the order the SOP specifies, never loose on a nursing station or in a pocket. In electronic systems, the LIS releases results across an interface into the electronic health record (EHR) (Section 17.2). Either way:

• Match two identifiers on the report to the chart or the electronic record.
• Never file Patient A's potassium onto Patient B because the last names look alike.
• Never leave protected health information (PHI) on a shared printer, fax tray, or break-room table (Chapter 16).
• Do not "help" by editing another collector's time or by releasing results you are not authorized to release.

If the printer jams mid-page, reprint; do not tape a fragment and hope. If the interface fails, follow downtime procedures rather than inventing a verbal chart entry.

Abnormal is not the same as critical

An abnormal result is outside the reference interval. The LIS may flag it H (high), L (low), or A (abnormal). Abnormal results are reported and documented through the usual release pathway: they appear on the final report with the flag and the range. Some laboratories also use delta checks (a result that changed more than expected from the previous value). A delta flag is a clue to investigate mislabeling or a real clinical change; it is not a license to diagnose.

You do not call every high or low as a panic. A glucose or hematocrit just outside the range is abnormal, not automatically critical. The laboratory medical director (or the SOP they approved) defines which analytes and which cutoffs are critical values. Assistants do not invent a personal panic list because a number "looks scary."

Critical values: significance and who acts

A critical value (also called a panic value) is a result that indicates an imminently life-threatening condition. CLIA 42 CFR 493.1291(g) requires the laboratory to immediately alert the individual or entity who requested the test, or another authorized person, when a result indicates an imminently life-threatening condition. Accrediting organizations such as The Joint Commission and the College of American Pathologists (CAP) expect laboratories to define the list, the who-to-whom path, a time frame, and documentation that includes read-back.

Examples you may see on a laboratory's local list (the list itself is not an AMT CMLA table): a very high potassium, a very low glucose, a critically high International Normalized Ratio (INR), a positive blood-culture Gram stain, or a critical blood gas. The significance is that delay can cost the patient minutes. The significance is not that the assistant now explains a disease to the family.

CMLA scope: If the SOP authorizes assistants to place the call, you acknowledge the flag, notify the authorized recipient, and document. You report the patient identifiers, the test name, the numeric or qualitative result, and the units. You do not independently diagnose ("you have renal failure," "this means a heart attack"). If the SOP says only a licensed technologist or nurse makes the clinical call, your job is to alert that person immediately—not to finish stocking shelves first.

How to notify: read-back, who may receive, time stamp, no voicemail

Follow the written critical-result SOP every time:

1. Verify before you call if the SOP requires it (repeat the assay, check specimen integrity, confirm the label). Do not skip a required check, and do not delay notification by repeating endlessly "to be sure."
2. Notify an authorized recipient: typically the ordering provider or a licensed caregiver responsible for the patient (registered nurse, nurse practitioner, physician assistant) named in the SOP. Not a roommate. Not "the daughter who usually handles things." Not an unauthorized coworker at the next bench.
3. Identify yourself, the laboratory, the patient with two identifiers, the test, the result with units, and that it is a critical value.
4. Read-back: the recipient repeats the patient, the test, and the result. You confirm the read-back is correct. If they do not read it back, ask them to.
5. Time-stamp the notification: date and clock time the result was available and the time the authorized person received it (the SOP may require both). Stay inside the laboratory's defined time frame. AMT does not publish a universal CMLA "15-minute" cutoff, so use the SOP, not a number you invent.
6. Do not leave criticals on voicemail. Voicemail does not confirm identity, does not produce a read-back, and parks PHI on an unattended mailbox. If no one answers, escalate per SOP: page the provider, call the covering service, notify the nursing or house supervisor, then the laboratory supervisor or medical director. Document every attempt.

After-hours clinics still need a live authorized person. "We close at 5 p.m." is not a reason to dump a critical potassium on an answering machine.

Documentation that makes the call real

A call that is not documented did not happen for the medical record. Document, in the LIS or the critical-call log the SOP names:

• Patient identifiers and accession
• Analyte, result, units, and that it was critical
• Date and time of the result and of the notification
• Full name and title of the person notified
• That read-back was obtained (or that it was not, and what you did next)
• Your name
• Failed attempts and the escalation path

Do not document a diagnosis. Do not alter times to look faster. Do not skip the log because "the nurse said she already knew."

Scenario

A waived chemistry system, operated per the instructions for use (IFU) and in control, produces a potassium of 6.8 mmol/L, which the laboratory list defines as critical. You acknowledge the flag, follow the SOP verification step, and call the patient's nurse—not the spouse in the lobby. You state two identifiers, "potassium 6.8 millimoles per liter, critical." The nurse reads it back. You confirm, enter the nurse's name, title, date, time, and read-back in the log, and you do not add "this is hyperkalemia from kidney failure." You do not leave the value on the clinic voicemail when the office is closed; you escalate to the on-call provider.

Exam traps

• Filing an unreleased analyzer printout as a final report, or filing a preliminary culture as final.
• Treating every H/L flag as a critical call.
• Leaving a critical result on voicemail or telling family the diagnosis.
• Calling an unauthorized person, skipping read-back, or omitting the time stamp.
• Independently diagnosing instead of reporting the number per SOP.

When CMLA shows a report or a panic number, name the missing report element, or name who is called, how read-back works, and what you document.