Study guide
9.4 Shipping, Slide Prep, Preanalytical Errors, and Complications
AMT Certified Medical Laboratory Assistant CMLA
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1 Introduction
1.1 Current Exam Facts 1.2 Blueprint Weights and Study Strategy
2 Chapter 2: Safety Terminology and Infection Control
2.1 Safety, Infection, and OSHA Terminology 2.2 Chain of Infection and Precautions 2.3 Isolation, Aseptic Technique, and Disease Prevention
3 Chapter 3: OSHA, HazCom, and Public-Health Reporting
3.1 OSHA Bloodborne Pathogens and Needlestick Safety 3.2 Hazard Communication, SDS, and GHS 3.3 Mandated Safety Rules and Public-Health Reporting
4 Chapter 4: Quality Assessment and Quality Control
4.1 Quality Control and Assessment Terminology 4.2 QC vs QA, Internal vs External QC, and Proficiency Testing 4.3 Daily QC, Temperature Logs, and Corrective Action 4.4 Instrument Maintenance and Calibration in CMLA Scope
5 Chapter 5: Waived-Test Integrity and Confirmatory Testing
5.1 Off-Label Waived Testing and High-Complexity Default 5.2 Following Manufacturer Instructions for Waived Tests 5.3 Confirmatory and Supplemental Testing
6 Chapter 6: Phlebotomy Foundations
6.1 Phlebotomy Terminology and Equipment 6.2 Serum, Plasma, Whole Blood, and Anticoagulation 6.3 Patient Identification and Container Identification
7 Chapter 7: Venipuncture, Order of Draw, and Specimen Integrity
7.1 Patient Preparation and Physiologic Effects 7.2 Vein Selection and Venipuncture Technique 7.3 Order of Draw and Tube Additives 7.4 Short Draws, Hemolysis, and Plasma-on-Cells Limits
8 Chapter 8: Capillary Collection, Processing, and Legal Specimens
8.1 Capillary Puncture Including Infants 8.2 Post-Care, Labeling, Transport, Processing, and Send-Outs 8.3 Specimens Used as Legal Evidence
9 Chapter 9: Non-Blood Collection and Preanalytical Errors
9.1 Urine Collection Types and Patient Instruction 9.2 Urine Suitability, Storage, Preservatives, and Rejection 9.3 Other Specimens and Time/Temperature Requirements 9.4 Shipping, Slide Prep, Preanalytical Errors, and Complications
10 Chapter 10: Clinical Chemistry
10.1 Clinical Chemistry Terminology and Test Families 10.2 Chemistry Instrumentation, Cleaning, and Maintenance 10.3 Point-of-Care and Waived Chemistry Testing 10.4 Toxicology Within CMLA Scope
11 Chapter 11: Hematology and Coagulation
11.1 Hematology Terminology, Blood Functions, and Cell Types 11.2 Hematology Instrumentation, QC, and Calibration 11.3 Coagulation: PT, PTT, INR, Heparin, and Warfarin 11.4 Point-of-Care and Waived Hematology Tests
12 Chapter 12: Immunology, Serology, and Immunohematology
12.1 Antigen-Antibody Principles 12.2 Blood Types, Rh, and Immunohematology Basics 12.3 Waived Immunology, Serology, and Immunohematology Procedures
13 Chapter 13: Microbiology
13.1 Microbiology Terminology and Specimen Appropriateness 13.2 Aseptic Processing, Storage, and Transport of Micro Specimens 13.3 Media, Cultures, and Procedure Matching 13.4 Stains, KOH, Wet Preps, Reagents, and Controls
14 Chapter 14: Urinalysis and Microscopy
14.1 Urinalysis Terminology 14.2 Waived Urinalysis Procedures and Specimen Handling 14.3 Microscopy Parts, Magnification, Wet Prep, and Cleaning
15 Chapter 15: Basic Anatomy and Physiology
15.1 Anatomy Relevant to Laboratory Testing 15.2 Physiology Relevant to Laboratory Testing
16 Chapter 16: Legal, Ethical, and HIPAA Foundations
16.1 Consent, ABN, Test Ordering, and PPM Restrictions 16.2 Patient's Bill of Rights, Refusal, and Medicolegal Risk 16.3 Professional Appearance, Conduct, and Social Media 16.4 HIPAA Confidentiality and Record Release
17 Chapter 17: Clerical Skills, Communication, and Critical Values
17.1 Reports, Abnormal Results, and Critical-Value Notification 17.2 HIT Data, Inventory, Expirations, and Billing/Coding 17.3 Patient Instruction, Communication, Telephone, and Time Management
9.4 Shipping, Slide Prep, Preanalytical Errors, and Complications
Key Takeaways Explain This Topic AI
CMLA slide work is smear quality for further analysis (even film, feathered edge, proper drying/fixing/staining per SOP), not independent interpretation of a white-cell differential.
Prepare, store, and dispose of specimens according to the SOP: leakproof labeled containers, required temperature, biohazard bags, and regulated medical-waste streams—not the household trash.
Shipping awareness: many laboratory specimens travel as Category B (UN3373) with IATA Packing Instruction 650 / DOT triple packaging—primary leakproof receptacle, secondary leakproof packaging with absorbent, rigid outer package; ice packs refrigerate, dry ice (UN1845) is a vented Class 9 hazard.
Identify and report preanalytical errors in collection, labeling, transport, and processing; do not silently "fix" an unlabeled or mishandled specimen.
For syncope, nausea, seizure, arterial puncture, nerve injury, or prolonged bleeding: stop, protect the patient, apply pressure when indicated, and call for help per SOP—do not finish the collection first.
Last updated: August 2026
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:
Primary receptacle: leakproof vial or cup, capped, labeled, sealed with parafilm or a screw cap as the SOP says.
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.
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.
Stage Examples you must catch
Collection Wrong method (saliva as sputum, random as culture, missed 24-hour voids), wrong container, hemolyzed or short blood draws from Chapter 7 arriving on your bench, patient not fasting when the test required it
Labeling Missing second identifier, label on the bag not the cup, two patients' labels in one bag, unlabeled CSF
Transport Unrefrigerated UA after 2 hours, semen on ice, dry ice on a refrigerate-only fluid, leaked bag, delayed CSF
Processing Centrifuging the wrong tube, pouring additive specimens together, making an unreadable smear, discarding leftover fluid, shipping without absorbent
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.