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Andrew Pollack-Gray

Nursing Notes

Specimen Collection

5 min read

When & Why?

Collecting clinical specimens helps the healthcare team investigate infections, organ function, bleeding, and other medical concerns.
Common specimens include:

  • Urine: Urinalysis, culture, and other testing.
  • Stool: Occult blood, infections, and digestive concerns.
  • Sputum: Respiratory infections and other lung conditions.
  • Kidney stones: Analysis of stone composition.

Before You Start

  1. Verify the specimen order and collection instructions with the nurse.
  2. Confirm the correct collection method, container, required quantity, and timing.
  3. Identify the resident using approved identifiers.
  4. Explain the procedure, provide privacy, and obtain permission.
  5. Perform hand hygiene and use appropriate PPE.
  6. Assemble supplies and check labeling requirements.
  7. Follow facility and laboratory requirements for labeling, storage, and transport.
    Important: Do not touch the inside of specimen containers or lids.

Steps

Urine — Midstream Clean-Catch

Use only when the ordered test requires this collection method.

  1. Provide the resident with appropriate cleansing supplies and instructions.
  2. Assist with cleansing as directed by the collection protocol.
  3. Ask the resident to begin urinating into the toilet.
  4. Collect the middle portion of the urine stream into the specimen container.
  5. Avoid touching the container’s interior or contaminating the specimen.
  6. Secure the lid and follow required labeling and transport procedures.
  7. Assist with hygiene and leave the resident comfortable.
    Remember: The instructor emphasizes three cleansing strokes, wiping from the urethral area toward the anus for applicable anatomy. Exact techniques vary by collection protocol and anatomy.

Stool Specimen

  1. Prepare a clean, dry collection device such as a commode hat or bedpan.
  2. Avoid mixing the specimen with urine, water, or toilet paper.
  3. Using the appropriate collection utensil, transfer the amount required.
  4. If directed, obtain material from more than one part of the stool.
  5. Close the container securely.
  6. Label and transport according to instructions.

Fecal Occult Blood Test

Used to detect blood that may not be visible in stool.

  • Follow the specific test kit instructions.
  • Some guaiac-based tests use a card and developer solution.
  • Other fecal blood tests use different collection devices and laboratory processing.
  • Never assume the same procedure applies to every kit.
  • Perform or assist with point-of-care testing only when authorized and trained.

Sputum Specimen

Before Collection

  1. Verify the specimen order and collection instructions with the nurse.
  2. Confirm whether the resident requires Transmission-Based Precautions.
  3. Follow the facility’s infection-prevention requirements, including appropriate location and PPE.
  4. Obtain the specified sterile collection container.
  5. Explain the procedure and reinforce instructions provided by the nurse.
    Collection Assistance
  6. Explain that sputum comes from the lower respiratory tract rather than ordinary saliva.
  7. Assist the resident with the prescribed collection procedure within your training and assigned responsibilities.
  8. Avoid touching the interior of the container or lid.
  9. Secure the container and follow bedside labeling requirements.
  10. Transfer the specimen according to laboratory transport instructions.
  11. Perform hand hygiene and dispose of contaminated supplies appropriately.
    Airborne Infection Precautions
  • If pulmonary tuberculosis is suspected or confirmed, do not initiate routine sputum collection without first confirming the required airborne precautions and collection location.
  • Sputum collection for suspected TB requires an appropriate designated environment and respiratory protection according to facility infection-control procedures.
  • Do not independently perform sputum induction or other aerosol-generating procedures.
  • Seek nursing or infection-prevention guidance when isolation requirements are uncertain.

Important: A standard surgical mask does not replace a properly fitted respirator when respiratory protection is required for airborne TB exposure.

Straining Urine for Kidney Stones

  1. Prepare the urine collection device and designated strainer.
  2. Instruct the resident on how to use the collection device.
  3. Pour collected urine through the strainer as directed.
  4. Look for retained stone material.
  5. Place any recovered material in the designated labeled container.
  6. Notify the nurse.

Safety & Observations

  • Follow Standard Precautions.
  • Maintain privacy and dignity.
  • Avoid specimen contamination.
  • Never obtain invasive specimens outside your authorized role.
  • Report visible blood, significant discomfort, or unexpected specimen findings.
  • Transport specimens promptly using the appropriate biohazard precautions.
  • Do not assume all specimens should be refrigerated; follow test-specific instructions.
  • Respiratory specimens: Verify isolation precautions before assisting with sputum collection. Suspected airborne infections may require specialized collection environments and respiratory protection.

What Should I Remember?

Correct patient → Correct specimen → Correct container → Correct label → Correct transport.

Practice

  • Studied
  • Observed
  • Practiced
  • Passed checkoff

Sources

Flashcards

What five checks prevent specimen collection errors?03-application / clinical-skills
Answer

Correct resident, specimen, container, label, and transport.

Can every specimen be refrigerated if processing is delayed?03-application / clinical-skills
Answer

No; follow test-specific storage instructions.

What distinguishes sputum from saliva?03-application / clinical-skills
Answer

Sputum comes from the lower respiratory tract after coughing.

What must be verified before collecting sputum from a resident with suspected TB?03-application / clinical-skills
Answer

Airborne precautions, approved collection location, and required respiratory protection.

Should a CNA independently perform sputum induction?03-application / clinical-skills
Answer

No. It requires authorized personnel and appropriate infection-control procedures.

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