9.4 Shipping, Slide Prep, Preanalytical Errors, and Complications

CMLA II.4.A.6–10 are the last preexamination tasks: prepare and stain slides for further analysis; prepare, store, and dispose of specimens per standard operating procedure; process specimens for shipping; identify and report preanalytical errors in collection, labeling, transport, and processing; and recognize patient problems related to syncope, nausea, and other complications. Blood technique was Chapters 6–8. Here you connect smear quality, a send-out box, an error report, and a fainting patient to the same rule: the result is only as good as the specimen and the patient is still in front of you.

Quick Answer: Make an even smear and stain it for someone else to interpret. Store and discard by SOP. Ship Category B with triple packaging; ice packs are not dry ice. Report labeling, delay, and processing errors. If the patient faints, seizes, bleeds, or has shooting nerve pain, stop, protect, apply pressure, and call for help.

Prepare and stain slides (quality, not the differential)

II.4.A.6 and the competency checklist (prepare and stain Gram-stained slides; prepare UA slides) sit at assistant level: smear quality. Interpreting a white-cell differential or naming organisms beyond your validated waived/POC menu is not the CMLA claim. You make a slide someone else—or a later chapter's waived procedure—can actually read.

Blood film (further analysis): a drop near the frosted end, spreader slide at the correct angle, a feathered edge, a body that is not a thick blob and not a holey washboard. Air-dry. Label the slide, not the lid of a mailer that can be swapped. A thick blob hides cells; a smear that stops short of an edge cannot be reviewed. Do not blow on the slide or wave it through a Bunsen flame as a drying shortcut that cooks the cells.

Gram stain (further analysis): even thin smear of the specimen, air-dry, fix per SOP (heat or methanol—do not invent a third method), then crystal violet, iodine, decolorize, safranin as the SOP times them. Over-decolorizing and under-decolorizing are stain-quality errors. You do not report "gram-positive cocci in clusters" as a standalone CMLA result unless you are performing a procedure your laboratory has validated in your scope. You do report that the smear washed off because it was never fixed.

Wet prep / UA sediment slide: within scope as Chapter 14 will detail. Here the preanalytical point is: use the issued slide or coverslip, do not overflow the microscope stage, and do not let the prep dry into crystals that were not in the cup.

Bad slides are preanalytical errors. Recollect or resmear per SOP; do not send a blob and hope.

Prepare, store, and dispose per SOP

II.4.A.7 is boring until someone leaks a 24-hour acid jug into a purse.

• Prepare: right container, right additive or preservative, cap leakproof, two identifiers on the container, collection date and time, biohazard bag with the requisition in the outside pouch (not soaked in the specimen).
• Store: the temperature the directory named (Sections 9.2–9.3). Do not park semen next to gray-top urine in the same fridge "for convenience." Do not leave CSF on the counter because the fridge looks full.
• Dispose: residual specimens, used cups, and contaminated PPE go in the laboratory's regulated medical waste or sharps stream as the SOP assigns. Empty leftover CSF into the sink is not disposal. Pouring extra stool into the staff toilet is not disposal. Acid 24-hour leftovers may need chemical-waste handling—read the SDS and SOP, not the trash-can instinct.

Hold specimens only as long as the SOP's retention schedule. Do not keep unlabeled "maybe we need it" cups in a drawer.

Process specimens for shipping (IATA/DOT at awareness level)

II.4.A.8 is awareness, not a full dangerous-goods certificate. Most routine diagnostic send-outs travel as Biological Substance, Category B, UN3373, packed to IATA Packing Instruction 650 (air) and the parallel DOT (49 CFR) ground rules. Your laboratory's shipping SOP and trained shipper win; you still must recognize a legal package.

Triple packaging:

1. Primary receptacle: leakproof vial or cup, capped, labeled, sealed with parafilm or a screw cap as the SOP says.
2. Secondary packaging: leakproof (often a sealed plastic bag or rigid inner) with enough absorbent to soak the entire liquid contents if the primary fails. Multiple primaries are individually wrapped so they cannot break each other.
3. Rigid outer package: marked with the UN3373 diamond and "Biological Substance, Category B" when that classification applies. The itemized list and requisition ride with the box, protected from the specimens.

Ice packs versus dry ice:

• Ice packs (gel packs) keep a refrigerated send-out cold. They go outside the secondary barrier so meltwater does not soak labels. They are not interchangeable with frozen shipment.
• Dry ice (solid carbon dioxide, UN1845, Class 9) keeps specimens frozen. It must be outside the sealed secondary packaging. The outer package must vent carbon dioxide gas—never airtight. Mark dry-ice mass and UN1845 per the SOP. Do not put dry ice inside the primary tube. Do not substitute dry ice for an ice pack on a refrigerate-only analyte (cells lyse; some assays die on freeze-thaw).

Category A infectious substances (UN2814/UN2900) are a different, stricter system used for certain high-risk cultures. CMLA does not freelance that classification. If the SOP says Category A, stop and get the trained shipper.

Identify and report preanalytical errors

II.4.A.9 is the professional habit: see it, stop, report, document. Silent correction is how the wrong result reaches a chart.

Report to the supervisor or documented error path before resulting. Recollect when that is safer than guessing. Chapter 8's legal-specimen rules still apply to drug screens: a broken seal is an error, not a tape job.

Patient problems and complications

II.4.A.10 lists syncope (fainting) and nausea and expects other complications. These events often happen during venipuncture, but the competency lives here so you treat the patient, not the remaining empty tubes.

Syncope: warning signs include pallor, sweat, dizziness, nausea, tunnel vision. Stop. Remove the needle if one is in place. Protect from a fall (lower the head and arms; do not prop an unconscious patient on the chair edge). Apply pressure to the puncture. Call for help per SOP. Do not continue filling tubes while consciousness is going.

Nausea / vomiting: stop if the patient is losing airway protection or cannot sit safely. Emesis basin, privacy, do not leave them alone with a needle in. After the episode, follow SOP on whether to continue.

Seizure: remove the needle immediately. Do not restrain limbs. Clear nearby objects. Nothing in the mouth. Call for help. Document. Do not finish the draw.

Arterial puncture: bright red pulsatile blood, rapidly expanding hematoma. Remove the needle. Prolonged firm pressure (often 5 minutes or more, per SOP), then a pressure dressing and notification. Do not relabel the tube as a venous specimen and send it.

Nerve injury: sharp electric or shooting pain, tingling into the hand. Remove the needle immediately. Do not probe for a better angle. Notify, document, and follow the injury SOP.

Prolonged bleeding: extra pressure, elevate if policy allows, do not dismiss a patient who is still oozing. Patients on anticoagulants bleed longer; that is expected but not ignored. Notify if bleeding will not stop or a hematoma is expanding.

The shared algorithm: stop the procedure, protect the patient, apply pressure when there is a puncture, call for help, document, do not hide the event. Finishing one last tube is not first aid.

In practice

You have a send-out frozen plasma, a Gram smear to make, and a patient who goes gray in the chair. The patient wins. Needle out, pressure, help, incident note. Later you make a feathered-edge smear, bag the send-out with absorbent and a rigid box, and you use dry ice only because the directory said frozen—not because ice packs were out. You do not ship an unlabeled primary "because the outer box has the name."

Exam traps

• Interpreting the differential instead of preparing the smear.
• One baggie as "shipping."
• Dry ice inside a sealed primary, or dry ice used as a chilled gel pack.
• Relabeling or dumping a problem specimen to avoid paperwork.
• Continuing a draw through syncope, seizure, or shooting nerve pain.

When CMLA shows a box, a slide, an error, or a collapsing patient, the assistant action is the SOP action: quality smear, legal package, reported error, and a protected patient.