Specimen Handling Protocols

Why Specimen Handling Is High-Stakes

Mishandled specimens can lead to lost diagnoses, incorrect pathology results, repeat surgery, or legal liability. The CST exam tests your understanding of the full chain of custody, from the moment tissue leaves the patient to the moment it is received by pathology.

On the Sterile Field

1. The surgeon identifies and names the specimen aloud as it is passed off the field.
2. The scrub person receives the specimen on a separate area of the field (never mixed with sponges or instruments) and confirms the description with the surgeon.
3. If orientation matters (e.g., margins on a tumor excision), the surgeon marks the specimen with sutures, clips, or ink per protocol before it leaves the field.
4. The specimen is placed in an appropriate container (dry, saline, formalin, or a sterile container for culture) as directed by the surgeon and facility protocol.

Transfer to the Circulator

• The scrub person and circulator verbally confirm the specimen description, source site, and any special handling instructions during the handoff.
• The circulator labels the container immediately with patient identifiers, specimen source, date, and surgeon name - labeling is never delayed until after the case.
• Two-identifier patient verification (name and date of birth or medical record number) is used at every handoff point, consistent with National Patient Safety Goals.

Special Handling Requirements

Specimen Type	Handling Requirement
Routine tissue for permanent pathology	Placed in 10% neutral buffered formalin unless otherwise directed
Frozen section	Sent immediately, dry, without formalin, for rapid intraoperative diagnosis
Culture specimens (aerobic/anaerobic)	Sent dry or in appropriate transport media, never in formalin
Bone/calcified tissue	May require decalcification before sectioning; noted on the requisition
Products of conception / sensitive specimens	Handled per facility policy with attention to patient privacy and required consents
Foreign bodies / forensic evidence	Chain-of-custody documentation required; may need to be turned over to law enforcement per policy

Documentation Requirements

• Specimen name/description as stated by the surgeon
• Anatomical source/site
• Number of specimens (each specimen is typically logged and labeled individually if multiple are taken)
• Preservative or transport medium used
• Time sent and personnel who verified/transported the specimen

Key Exam Points

• Never allow a specimen to be discarded, set aside, or left unlabeled - specimen loss is considered a serious reportable event.
• A frozen section is time-sensitive; it should be transported to pathology immediately, without preservative, per the surgeon's order.
• Verbal confirmation of the specimen between scrub, circulator, and surgeon reduces mislabeling and wrong-patient/wrong-site errors.
• If a specimen requires orientation (margins), improper marking can compromise the pathologist's ability to assess tumor margins accurately.