IMMERSIVE CLINICAL LABORATORY · Case CL-C01 · From provider order to labeled CBC specimen
Specimen Collection
Where accuracy begins
Curious Explorer · Specimen Collection overviewCareer Explorer · Specimen Collection in depth
Specimen Collection is where the laboratory story begins. Before an analyzer can measure anything, the right person, order, specimen, container, label, collection time, and handling conditions have to stay connected.
This department turns a request for testing into a usable specimen. Collection choices can protect the evidence or quietly change it, so careful identification, preparation, communication, and transport matter just as much as the needle or collection device.
Specimen Collection is the preexamination front line of laboratory medicine. Career Explorers follow the entire encounter: confirming the order and required preparation, using approved identifiers, selecting the correct collection method and container, protecting specimen integrity, labeling in the presence of the patient, and completing a traceable handoff.
What happens here
- Review test-specific preparation, timing, site, source, and container requirements.
- Collect blood or other specimens using the laboratory’s current procedure and safety controls.
- Label, document, mix when required, and route the specimen under defined time and temperature conditions.
Where judgment enters
Collectors recognize difficult draws, incomplete identification, wrong containers, insufficient volume, clots, contamination risk, line-draw concerns, patient reactions, and transport delays. The safest decision may be to stop, clarify, recollect, or escalate rather than send a questionable specimen forward.
What the work feels like
The role combines technical precision with real-time communication. Phlebotomists, laboratory assistants, nurses, and other trained collectors work with patients while protecting the downstream needs of every testing department.
Six objects are waiting to be investigated.
Protect the preexamination story
Step through the decisions that make a specimen interpretable before any analyzer sees it.
Follow the evidence path. Select a step to open its explanation.
01IdentifyDetailsClose
Match the provider order, required identifiers, source, and requested tests before collection.
02CollectDetailsClose
Use the correct container and source under the organization’s current procedure.
03ProtectDetailsClose
Record time and condition, then preserve identity and stability through the handoff.
CASE STUDY · CHOOSE YOUR PATH
How deeply do you want to investigate?
Select a case level before the first decision. This choice is independent from the department overview above.
Select every clue that belongs in your observation.
No clues selected yet. This button-only observation builder accepts no typed information. “More information needed” is always a valid finding.CASE PATH COMPLETE
You protected the story before the analyzer told it.
You practiced the kind of laboratory judgment that makes later results more trustworthy: verify identity, follow examination-specific requirements, stop when evidence does not agree, and preserve every handoff.
FIELD TOOL
Department tool
These rules power the case decisions. Exact limits are shown only after an evidence review; laboratory- or method-specific requirements stay clearly scoped.
Showing all 6 reviewed entries.
Hematology · SRC-CBC-01Complete Blood Count (CBC) with DifferentialCBC · CBC with differential · blood cell count＋
Scope: Public reference-laboratory example used as the source-controlled rule set for this prototype. Another laboratory or analytical method may validate different limits.
- Tube / container
- Lavender-top EDTA tube
- Specimen
- Whole Blood EDTA
- Source
- Whole blood; this case uses an outpatient venous collection
- Preferred / minimum volume
- Preferred 3 mL · cited minimum 1.5 mL
- Fill requirement
- Meet the intended tube fill and the current laboratory minimum. Cap color alone is not controlling evidence.
- Light protection
- No special light-protection instruction is listed in the cited test-catalog entry.
- Sterile requirement
- No sterile-container requirement is listed for this CBC entry.
- Processing
- Keep the validated specimen as EDTA whole blood; processing and any smear workflow follow the current Hematology procedure.
- Laboratory route
- Specimen Processing → Hematology
Stability in the cited rule set
Special instructions
- The cited whole-blood stability does not automatically establish stability for a separately prepared smear or morphology workflow.
- Evaluate identity, container/additive, volume, timestamps, temperature, and specimen condition together.
Accept clues
- Correct EDTA whole blood and matched label/order
- Within the cited temperature and time limit
- Sufficient volume
- No clot and no gross hemolysis reported
Hold & investigate
- Missing or conflicting collection/receipt time
- Temperature, fill, source, or condition cannot be verified
- Label/order information needs clarification
Reject / recollect clues
- Clotted specimen
- Gross hemolysis under this cited reference-laboratory rule set
- Other failures defined by the laboratory’s current procedure
Chemistry · SRC-GTT-01A/BPregnancy Oral Glucose Tolerance Series (GTT)—Order SpecificGestational GTT · 75 g one-step · 100 g diagnostic series＋
Scope: Two current public test-catalog examples are shown because pregnancy glucose testing has more than one accepted strategy. The exact provider order, performing laboratory, validated method, and local procedure always control. This entry does not diagnose or recommend a protocol.
- Tube / container
- Preferred in both cited entries: a separate fluoride/oxalate (gray-top) tube for each ordered timepoint
- Specimen
- Separate timed plasma specimens; the cited entries also accept specified immediately separated serum or plasma alternatives
- Source
- Venous blood collected at the fasting baseline and at every timepoint named in the exact provider order
- Preferred / minimum volume
- 75 g series: three 1 mL specimens preferred · 100 g series: four 1 mL specimens preferred · cited minimum 0.5 mL per specimen
- Fill requirement
- Collect enough for every independent timepoint and never pool tubes. Confirm the printed additive and current laboratory requirement rather than relying on cap color.
- Light protection
- No special light-protection instruction is listed in either cited pregnancy GTT entry.
- Sterile requirement
- No sterile-container requirement is listed in either cited pregnancy GTT entry.
- Processing
- Label every specimen with its actual draw time. Serum and plasma alternatives must be separated from cells immediately; transport conditions then follow the selected specimen type in the cited rule set.
- Laboratory route
- Specimen Processing → Chemistry
Stability in the cited rule set
Special instructions
- Confirm the exact ordered strategy before collection: the cited 75 g entry uses fasting, 1-hour, and 2-hour specimens; the cited 100 g entry uses fasting, 1-hour, 2-hour, and 3-hour specimens.
- Both cited diagnostic entries define fasting as no food or beverage other than water for at least 8 hours.
- The glucose load, timepoints, interpretation, and response to a delayed or missed draw must come from the provider order and the laboratory’s current procedure—not from memory or this case.
Accept clues
- Exact protocol and glucose load agree with the provider order
- Each timepoint has its own correctly labeled specimen and actual collection time
- Required fasting state, volume, container, separation, and transport conditions are documented
Hold & investigate
- The ordered strategy, glucose load, fasting state, or timepoint is unclear
- A collection time is missing or a timepoint was delayed
- Separation status or selected specimen type cannot be verified
Reject / recollect clues
- Unspun serum or plasma separator tube under the cited rule set
- Red- or green-top tube when the serum or heparinized plasma was not separated from cells
- An anticoagulant other than the listed fluoride/oxalate, lithium heparin, or sodium heparin alternatives
Blood Bank · SRC-TS-01A/BPretransfusion Type-and-Screen (ABO/Rh + Antibody Screen)Type and screen · ABO/Rh · red-cell antibody screen＋
Scope: This educational composite uses two public reference-laboratory component entries. It does not replace a hospital transfusion service’s specimen-validity, identity, history, recollection, or compatibility-testing rules.
- Tube / container
- Original pink-top EDTA tube(s); the performing transfusion service controls the number of tubes and whether a combined order can share a specimen
- Specimen
- Whole Blood EDTA
- Source
- Venous whole blood for a preoperative order; patient history and identity requirements remain part of the transfusion-service workflow
- Preferred / minimum volume
- Each cited standalone component lists 6 mL preferred and 3 mL minimum; confirm the volume and tube count for the actual combined order
- Fill requirement
- Meet the performing transfusion service’s current validated quantity and identity requirements. Do not infer sufficiency from cap color or from another department’s tube.
- Light protection
- No special light-protection instruction is listed in either cited component entry.
- Sterile requirement
- No sterile-container requirement is listed in either cited component entry.
- Processing
- Mix the EDTA specimen as instructed, keep it in the original tube, and do not aliquot. The cited ABO/Rh standalone entry requires its own vial and cannot be shared with other tests.
- Laboratory route
- Specimen Processing → Blood Bank
Stability in the cited rule set
Special instructions
- A type-and-screen combines ABO/Rh typing with a red-cell antibody screen; a positive screen may trigger antibody identification under the cited rule set.
- Analytical specimen stability is not the same as how long a pretransfusion specimen remains eligible for compatibility testing.
- Compatibility-use limits depend on the transfusion service’s current policy and relevant pregnancy/transfusion history; do not invent a universal expiration from these catalog stability values.
Accept clues
- Original EDTA specimen, matched order, and complete identity evidence
- Required volume and arrival window are met for both ordered components
- Relevant transfusion/pregnancy history is available to the transfusion service as required
Hold & investigate
- Tube count, sharing rule, collection time, or arrival time needs clarification
- Identity information or required history is missing or conflicting
- The specimen’s eligibility for compatibility testing cannot be established from current policy
Reject / recollect clues
- Gross hemolysis under both cited component rule sets
- Aliquoted specimen where the cited entry requires the original tube
- Other identity, labeling, or suitability failures defined by the transfusion service’s current procedure
Chemistry · SRC-BMP-01Basic Metabolic Panel (BMP), SerumBMP · metabolic panel · electrolytes and kidney markers＋
Scope: Public reference-laboratory serum BMP example used as a source-controlled teaching rule set. Plasma options, processing windows, stability, and interference rules can differ by laboratory and analytical method.
- Tube / container
- Preferred collection tube: serum gel · acceptable: red top · submission container: plastic vial
- Specimen
- Serum
- Source
- Serum; this case uses a postoperative venous collection
- Preferred / minimum volume
- Preferred 0.5 mL · cited minimum 0.4 mL
- Fill requirement
- Collect enough whole blood to yield the required serum quantity after clotting and centrifugation; the cited catalog controls the submitted serum volume.
- Light protection
- No special light-protection instruction is listed in the cited test-catalog entry.
- Sterile requirement
- No sterile-container requirement is listed in the cited test-catalog entry.
- Processing
- Centrifuge a serum-gel tube within 2 hours. For a red-top tube, centrifuge and aliquot the serum into a plastic vial within 2 hours.
- Laboratory route
- Specimen Processing → Chemistry
Stability in the cited rule set
Special instructions
- The cited panel requires the patient’s age and sex for its reporting workflow.
- The provider order determines timing; a postoperative setting does not create an automatic or universal panel.
- Evaluate processing time, serum separation, volume, temperature, and specimen condition together.
Accept clues
- Correct serum specimen and matched label/order
- Centrifuged and, when required, aliquoted within 2 hours
- At least the cited minimum volume and refrigerated within the cited 24-hour rule
Hold & investigate
- Collection, centrifugation, separation, or receipt time is missing
- Submitted volume or temperature cannot be verified
- Patient data required by the performing laboratory is incomplete
Reject / recollect clues
- Gross hemolysis under the cited reference-laboratory rule set
- Other preparation or suitability failures defined by the laboratory’s current procedure
Microbiology · SRC-BC-01Adult Blood-Culture Set—Collection and Immediate TransportBlood cultures · aerobic and anaerobic bottles · bloodstream-infection workup＋
Scope: Current CDC adult blood-culture collection guidance is used for this teaching entry. Bottle configuration, exact fill range, transport system, acceptability, and rejection remain system- and institution-specific.
- Tube / container
- Laboratory-approved adult blood-culture bottles; a set usually includes one aerobic and one anaerobic bottle, but the system and institutional policy control
- Specimen
- Adult blood-culture set collected by trained clinical personnel
- Source
- Peripheral venipuncture is the CDC model; use a separate venipuncture site for the second set when possible
- Preferred / minimum volume
- CDC: 20–30 mL per adult set depending on system/policy; the model procedure targets 10 mL per bottle and 20 mL per set
- Fill requirement
- Measure and document the amount in each bottle. Use the bottle/system fill indication and the institution’s current policy; do not estimate from appearance alone.
- Light protection
- No special light-protection instruction is stated in the cited CDC collection guidance.
- Sterile requirement
- Aseptic collection is required. The CDC model includes appropriate skin disinfection and disinfection of each bottle septum using the approved procedure.
- Processing
- Document exact date/time, anatomic site, collection method, collector, location, and bottle volume; transport the set immediately for laboratory processing.
- Laboratory route
- Specimen Processing / Receiving → Microbiology
Stability in the cited rule set
Special instructions
- CDC recommends at least two adult sets for a suspected septic episode and describes 2–4 sets within 24 hours, before antibiotics when possible; the provider order and institutional policy control the case.
- Volume is more critical than timing between sets in the cited CDC guidance.
- This activity teaches evidence and routing decisions, not venipuncture technique.
Accept clues
- Correctly identified, intact bottle set with the ordered bottle types
- Actual collection volume, time, site, method, and traceability are documented
- Set is transported immediately under the current laboratory process
Hold & investigate
- Bottle volume is inadequate, unknown, or inconsistent with the system indication
- Collection site, time, method, bottle type, or number of sets is incomplete
- Delay, bottle damage, leakage, or identity information needs investigation
Reject / recollect clues
- The cited CDC page does not define universal rejection criteria; apply the laboratory’s written acceptability and rejection policy
- Any disposition must preserve patient safety, documentation, and prompt clinical communication
Reference Testing · SRC-PLP-01Pyridoxal 5-Phosphate (Vitamin B6), Plasma — Reference RoutePLP · vitamin B6 · light-protected frozen plasma＋
Scope: Public reference-laboratory PLP catalog entry used for this send-out’s preparation, specimen, volume, processing, light protection, frozen transport, and availability examples. It is not a universal vitamin-testing workflow.
- Tube / container
- Collection: green-top sodium/lithium heparin or plasma-gel separator tube · Submission: amber vial
- Specimen
- Heparin plasma
- Source
- Venous blood for a referral order; preparation is verified before collection
- Preferred / minimum volume
- Preferred 1 mL plasma · cited minimum 0.75 mL
- Fill requirement
- Collect enough blood to yield at least the cited plasma minimum after processing. Verify the printed additive and destination requirements rather than cap color alone.
- Light protection
- Required. Ship the processed plasma in an amber vial and keep it light protected.
- Sterile requirement
- No sterile-container requirement is listed in the cited entry.
- Processing
- Within 2 hours of collection, centrifuge at 4 °C, aliquot all plasma into the amber vial, and freeze immediately under the cited rule set.
- Laboratory route
- Specimen Processing → Reference Testing & Send-Outs
Stability in the cited rule set
Special instructions
- The cited entry requires a 12-hour fast; water may be taken as needed.
- The cited entry instructs no multivitamins or vitamin supplements for 24 hours before collection.
- The exact performing laboratory and its current requirements must be reconfirmed before every real referral.
Accept clues
- Correct heparin plasma and matched order
- At least the cited minimum volume
- Preparation, cold processing, amber aliquot, freezing, and light protection documented
- Frozen referral transport remains traceable
Hold & investigate
- Preparation, collection time, processing time, volume, temperature, light protection, or destination cannot be verified
- Courier or frozen-state traceability is incomplete
- The current performing-laboratory entry has not been checked
Reject / recollect clues
- No alternative specimen type is listed in the cited entry
- A disposition for any deviation follows the current destination and referring-laboratory procedures rather than this case
Only tests with a reviewed source record appear here. More entries unlock as their cases pass scientific and evidence review.
Build the specimen story from several clues
Visual appearance is only one part of the evidence. Some conditions require a governed instrument, process, or laboratory assessment.
Confirm the printed additive and current test entry—not cap color alone.
A clot can make EDTA whole blood unsuitable for this cited CBC rule set.
Gross hemolysis is rejected in the cited CBC catalog. Follow the laboratory’s approved assessment.
Compare the actual quantity with the test-specific preferred and minimum volume.
Use it only when the current test entry or procedure requires it.
Some examinations require a sterile container and a documented source; this CBC entry does not.
Origin planning desk
BRR fictional teaching system. Case records, console behavior, alerts, and exercise rules are invented for learning. The console arranges supplied evidence; it does not measure specimens, operate equipment, or authorize patient results. For actual laboratory work, use current manufacturer instructions and the laboratory’s approved procedures. Learning objective: Build a collection plan from an order and a fictional patient background record.
- Gather: link every supplied card to the fictional case and state the learning question.
- Compare: arrange the identity link, requested evidence, collection context into separate case sections.
- Challenge: name a disagreement, missing observation or alternative explanation.
- Explain: write one supported conclusion and one limit; do not invent absent data.
- Handoff: give each unresolved question a named role and a reason for the next evidence request.
- Close the exercise only after its evidence and explanation tasks are complete. This completion does not authorize clinical release.
BRR practice case checks
BRR independently designed learning rules, BRR-2026-10-01-original-1
| BRR code | Exercise meaning | Evidence task |
|---|---|---|
| BRR-C-LINK | Evidence cards do not share the same fictional case identifier. | Pause the explanation and reconcile the supplied identifiers. |
| BRR-C-COVERAGE | A required case section has no supporting card. | Identify the missing panel and request its evidence before claiming completion. |
| BRR-C-CONTEXT | A background information record needed for the plan is absent. | Ask for the missing context; do not invent a collection instruction. |
BRR explanation checks
BRR independently designed learning rules, BRR-2026-10-01-original-1
| BRR code | Exercise meaning | Evidence task |
|---|---|---|
| BRR-C-ROUTE | The plan names a destination without explaining why. | Connect each planned sample to the question it is meant to answer. |
| BRR-C-CLAIM | The proposed conclusion exceeds what the case details support. | Narrow the conclusion and state its uncertainty. |
| BRR-C-HANDOFF | An unresolved question has no next owner. | Record the question, evidence and the receiving role. |
A complete exercise contains linked evidence, an explanation supported by the case details, stated uncertainty and a traceable handoff. No BRR code is a manufacturer error code or a clinical operating instruction.
Ask these before you act
- What exactly did the provider order—and what did they not order?
- Can I connect this specimen to the correct request without guessing?
- Am I using the printed additive and current guide—not cap color alone?
- What changed between Time Collected and Time Received?
- Was the specimen kept at the temperature and under the light conditions the test requires?
- Does this order include a schedule, fasting instruction, timed series, source, or destination requirement?
- If one controlling fact is missing, should the path pause for investigation?
Try to name the single missing fact that would change your decision. That is more useful than guessing “good” or “bad.”
Origin planning desk
BRR fictional teaching system. Case records, console behavior, alerts, and exercise rules are invented for learning. The console arranges supplied evidence; it does not measure specimens, operate equipment, or authorize patient results. For actual laboratory work, use current manufacturer instructions and the laboratory’s approved procedures.
- Gather: link every supplied card to the fictional case and state the learning question.
- Compare: arrange the identity link, requested evidence, collection context into separate case sections.
- Challenge: name a disagreement, missing observation or alternative explanation.
- Explain: write one supported conclusion and one limit; do not invent absent data.
- Handoff: give each unresolved question a named role and a reason for the next evidence request.
- Close the exercise only after its evidence and explanation tasks are complete. This completion does not authorize clinical release.
Open Sources & References
References include public guidance, article records and publisher listings. A listing or abstract does not establish full-text verification. These links support scientific background. BRR model rules are authored separately. A citation does not grant reproduction permission; restricted standards are not reproduced here.
CLSI PRE02 — Collection of Diagnostic Venous Blood Specimens, 8th ed. (2025)
Current stepwise venous-blood collection guidance, including pediatric and special-collection considerations.
View publisher record (full text requires access) ↗OSHA — Bloodborne Pathogens Standard, 29 CFR 1910.1030
Current U.S. occupational requirements for controlling exposure to bloodborne hazards.
Open primary source ↗U.S. Bureau of Labor Statistics — Phlebotomists
Current role description, work settings, education, and U.S. outlook information.
Open primary source ↗American Diabetes Association — Diagnosis and Classification of Diabetes: Standards of Care in Diabetes—2026
Current one-step and two-step strategies for gestational diabetes screening and diagnosis; the activity requires the exact provider order and local procedure rather than assuming a universal GTT sequence.
Open primary source ↗The Joint Commission — Two Patient Identifiers: Understanding the Requirements
Explains the two-identifier intent and labeling blood and other specimen containers in the patient’s presence.
Open primary source ↗eCFR — 42 CFR § 493.1242: Specimen submission, handling, and referral
Current federal requirements for written specimen collection, handling, transport, processing, acceptability, rejection, referral policies, and documentation of the date and time received.
Open primary source ↗Mayo Clinic Laboratories — Complete Blood Cell Count (CBC) with Differential, Blood
Public reference-laboratory test-catalog entry used for the prototype CBC specimen, volume, rejection, and stability rules. Requirements can differ by laboratory and method.
Open primary source ↗Quest Diagnostics — Glucose Tolerance Test, Gestational, 3 Specimens (75 g)
Public test-catalog entry used for the 75 g fasting, 1-hour, and 2-hour collection series, preferred specimens, processing, stability, and rejection examples.
Open primary source ↗Quest Diagnostics — Glucose Tolerance Test, Gestational, 4 Specimens (100 g)
Public test-catalog entry used for the 100 g fasting, 1-hour, 2-hour, and 3-hour collection series. The provider order and performing laboratory determine which strategy applies.
Open primary source ↗Mayo Clinic Laboratories — ABO/Rh, Blood
Public component entry used for specimen, original-tube, volume, stability, and gross-hemolysis rules. It is not a universal transfusion-service compatibility-validity policy.
Open primary source ↗Mayo Clinic Laboratories — Antibody Screen with Reflexed Antibody Identification, Blood
Public component entry used for original-tube, arrival, volume, stability, rejection, and reflex examples for the educational type-and-screen record.
Open primary source ↗Mayo Clinic Laboratories — Basic Metabolic Panel, Serum
Public serum BMP entry used for preferred and acceptable tubes, submitted volume, centrifugation/aliquot timing, stability, and gross-hemolysis rules.
Open primary source ↗CDC — Collect Adult Blood Culture Sets
Current public CDC guidance used for adult set volume, multiple-set collection, documentation, separate sites, and immediate laboratory transport. Bottle-specific rules remain local.
Open primary source ↗CDC — Prevent Adult Blood Culture Contamination
Current CDC quality framework for preventing and monitoring adult blood-culture contamination; updated March 31, 2026.
Open primary source ↗CDC — Sub-Measure: Single-Set Blood Culture Rate
Explains why a single adult set lacks the optimal total volume and why institutions should monitor single-set collection.
Open primary source ↗CDC — Blood Culture Contamination: An Overview for Infection Control and Stewardship Programs
Public overview of why blood-culture contamination can affect diagnostic quality and patient care.
Open primary source ↗Shean et al. — Intravenous fluid-induced specimen contamination and detection strategies (Journal of Laboratory and Precision Medicine, 2025)
Peer-reviewed narrative review supporting the qualitative line-draw investigation and the need to interpret multi-analyte patterns with collection context.
Open primary source ↗Association for Diagnostics & Laboratory Medicine — Collecting Blood from Patients with Vascular Lines
Public laboratory education on reconstructing infusion and collection details when contamination is suspected. Current local procedure remains controlling.
Open primary source ↗Mayo Clinic Laboratories — Pyridoxal 5-Phosphate, Plasma
Public reference-laboratory entry used for the referral case’s preparation, heparin plasma, volume, cold processing, amber vial, freezing, light protection, and 2–7 day report-availability examples.
Open primary source ↗CLSI PRE01 — Patient and Laboratory Specimen Identification Processes, 1st ed. (2024)
Patient/specimen identification, labeling, handling, and transport across the testing pathway.
View publisher record (full text requires access) ↗CLSI PRE04 — Handling, Transport, Processing, and Storage of Blood Specimens (2023)
Preexamination variables, specimen integrity, transport, centrifugation, processing, and storage.
View publisher record (full text requires access) ↗CMS — Clinical Laboratory Improvement Amendments (CLIA)
Current federal program overview and the goals of accurate, reliable, and timely laboratory testing.
Open primary source ↗CMS State Operations Manual, Appendix C — Survey Procedures and Interpretive Guidelines for Laboratories (revision 2025)
Includes §493.1242 specimen submission, handling, and referral expectations.
Open primary source ↗W3C — WCAG 2.2: Pause, Stop, Hide
Basis for visitor-controlled movement and animation.
Open primary source ↗42 CFR §493.1232 — Identification and integrity
Supports the patient/specimen identity checks used in the BRR specimen journey.
Read public guidance ↗42 CFR §493.1242 — Specimen handling and referral
Public requirements for written specimen collection, labeling, transport, processing and acceptance policies.
Read public guidance ↗Links marked “Read public guidance” were opened and read for the points described on their cards. Publisher listings and article records identify further reading; they do not establish full-text review. BRR cases and teaching-model rules are authored separately. Clinical procedures and instrument messages require the applicable current laboratory procedure and manufacturer instructions.
Collection rewards calm communication, compassion, careful observation, dexterity, and the ability to follow an exact identity process even when the day is busy.
Roles you may meet here
- Phlebotomist
- Medical laboratory assistant
Phlebotomists and qualified laboratory assistants may collect specimens in patient service centers or through outreach services, according to their training and authorized duties.
Education, certification, licensure, and job titles vary by location and employer. Use the current career links in Sources & References to investigate further.
Open the examples to compare routine, timed, inpatient, surgical, and reference-testing orders. The provider order and the laboratory’s current test guide—not the encounter label alone—control what is collected.
Complete blood count (CBC)
Provider e-order
- Case ID
- CL-C01
- Authorized order
- Complete blood count (CBC)
- Timing
- Routine collection window shown by the order
- Specimen plan
- EDTA whole blood — confirm the printed additive and current test guide
- Laboratory route
- Specimen Processing → Hematology
Collector checkpoint: Read the authorized order before choosing a tube, then confirm its timing and current specimen requirements.
Pregnancy glucose-tolerance series — the exact one-step or two-step protocol is identified by the provider order
Provider e-order + timed worksheet
- Case ID
- CL-GTT02
- Authorized order
- Pregnancy glucose-tolerance series — the exact one-step or two-step protocol is identified by the provider order
- Timing
- Baseline and ordered timed intervals; timing begins only as defined by the current procedure
- Specimen plan
- Glucose specimens in laboratory-approved tubes; collection and processing requirements are method- and site-specific
- Laboratory route
- Specimen Processing → Chemistry
Collector checkpoint: Pregnancy glucose testing has more than one accepted strategy. Never invent the glucose load, fasting requirements, timepoints, or interpretation thresholds.
CBC + type and screen ordered for this encounter
Provider e-order
- Case ID
- CL-PRE03
- Authorized order
- CBC + type and screen ordered for this encounter
- Timing
- Scheduled pre-procedure collection window on the order
- Specimen plan
- EDTA specimens routed separately to Hematology and Blood Bank under each department’s current requirements
- Laboratory route
- Specimen Processing → Hematology + Blood Bank
Collector checkpoint: This is a provider order, not a recommendation that every pre-surgery patient needs these tests.
CBC + basic metabolic panel ordered after the procedure
Provider e-order
- Case ID
- CL-POST04
- Authorized order
- CBC + basic metabolic panel ordered after the procedure
- Timing
- Ordered post-procedure collection time
- Specimen plan
- EDTA whole blood plus the laboratory-approved serum or plasma specimen in the current test guide
- Laboratory route
- Specimen Processing → Hematology + Chemistry
Collector checkpoint: Confirm the actual specimen source and ordered timing. Do not infer or add tests simply because surgery occurred.
Routine morning tests shown on a controlled downtime requisition
Authorized downtime paper order
- Case ID
- CL-IP05
- Authorized order
- Routine morning tests shown on a controlled downtime requisition
- Timing
- Collection window and order-authentication fields shown by the controlled workflow
- Specimen plan
- Only the containers required by the current test guide
- Laboratory route
- Specimen Processing → Ordered departments
Collector checkpoint: Reconcile the paper order through the laboratory’s approved downtime process before collection and again during handoff.
Specialized test performed by a reference laboratory
Provider e-order + reference requisition
- Case ID
- CL-REF06
- Authorized order
- Specialized test performed by a reference laboratory
- Timing
- Destination laboratory’s current collection window
- Specimen plan
- Container, quantity, processing, storage, and transport verified against current destination requirements
- Laboratory route
- Specimen Processing → Reference Testing
Collector checkpoint: The destination laboratory’s current requirements control. Never guess from memory or an outdated requisition.
Wristband-to-tube labeling checkpoint
This abstract arm and these tubes demonstrate the identity chain from wristband to specimen label.
PATIENT ID PX-47
EDTA · T+00
PATIENT ID PX-82
ORDERED TIMEPOINT
PATIENT ID PX-19
PINK EDTA · 05:54
Real organizations define the approved identifiers and required label fields within their current procedures.
Routine work establishes what normal flow looks like. Investigation cases branch only when the evidence gives the laboratory a reason to pause.
From provider order to labeled CBC specimen
- Origin
- Outpatient
- Specimen
- EDTA whole blood
- Estimated Play Time
- 12–16 min
- Time Collected
- 08:14
- Time Received
- 08:31
- Transit
- 17 min
Practice: Order review · wristband match · collection · labeling · receipt decision
The pregnancy GTT where every timepoint matters
- Origin
- Outpatient
- Specimen
- Ordered glucose series
- Estimated Play Time
- 14–20 min
- Time Collected
- 07:30 · baseline
- Time Received
- 07:42 · baseline
- Transit
- 12 min · each tube checked separately
Practice: Protocol check · timer control · timepoint labels · Chemistry route
The pre-surgery orders that split toward two departments
- Origin
- Preoperative
- Specimen
- CBC + type-and-screen specimens
- Estimated Play Time
- 12–18 min
- Time Collected
- 05:54
- Time Received
- 06:11
- Transit
- 17 min
Practice: Order review · separate requirements · Hematology and Blood Bank routes
The post-surgery draw where timing and source matter
- Origin
- Inpatient
- Specimen
- CBC + metabolic-panel specimens
- Estimated Play Time
- 12–18 min
- Time Collected
- 14:22
- Time Received
- 14:49
- Transit
- 27 min
Practice: Ordered timing · source documentation · Hematology and Chemistry routes
Morning rounds: several ordinary specimens, one careful route
- Origin
- Inpatient
- Specimen
- Multiple ordered specimens
- Estimated Play Time
- 10–14 min
- Time Collected
- 05:42
- Time Received
- 06:36
- Transit
- 54 min
Practice: Identity · priority · traceability
The blood-culture bottles with a contamination clue
- Origin
- Inpatient
- Specimen
- Two adult blood-culture sets
- Estimated Play Time
- 14–20 min
- Time Collected
- 19:08
- Time Received
- 19:26
- Transit
- 18 min
Practice: Collection context · volume · observation · Microbiology route
Results that do not fit the line-draw story
- Origin
- Inpatient
- Specimen
- Paired blood specimens
- Estimated Play Time
- 12–18 min
- Time Collected
- 10:15 / 10:34
- Time Received
- 10:52
- Transit
- 37 / 18 min
Practice: Source clues · comparison · recollection · audit trail
A light-protected specimen headed to a reference laboratory
- Origin
- Outreach
- Specimen
- Frozen light-protected heparin plasma
- Estimated Play Time
- 14–20 min
- Time Collected
- 09:05
- Time Received
- 09:44
- Transit
- 39 min
Practice: Current requirements · cold processing · light protection · courier handoff
Pause, protect, and recover after an interrupted collection
- Origin
- Outpatient
- Specimen
- Interrupted collection event
- Estimated Play Time
- 10–14 min
- Time Collected
- Interrupted
- Time Received
- No initial specimen
- Transit
- Not applicable
Practice: Human factors · safety hold · documentation · safe restart
Only cases that pass scientific, source, interaction, accessibility, and responsive review are marked playable.
The same specimen story can cross several rooms. The active department is highlighted; Reference Testing is a governed pathway from Processing, not a twelfth department.
- Specimen Collection
- Specimen ProcessingReceive · inspect · route
- UrinalysisPhysical · chemical · microscopic
- Molecular DiagnosticsExtract · amplify · detect
- CoagulationClotting pathway evidence
- HematologyCounts · flags · morphology
- ChemistryAnalytes · patterns · interferences
- MicrobiologyCulture · identification · susceptibility
- ParasitologyStructures · stages · context
- ImmunologyAntigen · antibody · patterns
- Blood BankCompatibility · selection · release
- Clinical Laboratory Resource RoomPeople · quality · connected operations
- Reference Testing & Send-Outs Governed pathway from Processing
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