Skip to practical collection
MEDIVEERSETHE PRACTICAL HUB
← Forensic Medicine & Toxicology / 3rd Year / MBBS

OBSERVE / REASON / EXPLAIN

Toxicology sample planning

Practise a structured, objective and appropriately authorised medicolegal station.

Original teaching scenario / OSCE

Your practical station

A simulated referral requests toxicology testing. Explain the information needed before choosing and sending a specimen.

Recognise and interpret

Reliable documentation preserves observations, identity, context and traceability without unsupported conclusions.

  • Clarify the clinical and testing question
  • Check laboratory requirements
  • Document timing, identity and storage
1

Question

State the suspected exposure and clinical context without assuming a toxin.

2

Sampling

Confirm matrix, container, preservative and timing with the receiving laboratory.

3

Interpretation

Relate results to collection conditions, detection limits and the clinical picture.

At the viva table

Try answering aloud, then open the suggested answer. Examiner questions vary.

01 / Is one preservative appropriate for all toxicology tests?

No. Requirements are assay- and specimen-specific.

02 / Does a negative screen exclude every exposure?

No. Panels, timing and detection limits restrict what it can exclude.

03 / Why record collection time?

Concentrations and detectability can change over time.

04 / Can a result alone establish the circumstances of exposure?

No. Clinical and investigative context remains essential.

Read further