Training activity information
Details
Perform and interpret assays for the measurement of including chromatographic analysis:
- Ethylene glycol
- Ethanol
- Methanol
Type
Developmental training activity (DTA)
Evidence requirements
Evidence the activity has been undertaken by the trainee.
Reflection on the activity at one or more time points after the event including learning from the activity and/or areas of the trainees practice for development.
An action plan to implement learning and/or to address skills or knowledge gaps identified.
Considerations
- Local and national training guidelines, standards and pathways
- Method selection, including pre-analytical issues, assay advantages and limitations, quality parameters, and interferences
- Equipment calibration and maintenance
- Quality control; EQA and IQC
- National and international guidelines
- Analyte “cut offs”
- Role of the duty biochemist
Reflective practice guidance
The guidance below is provided to support reflection at different time points, providing you with questions to aid you to reflect for this training activity. They are provided for guidance and should not be considered as a mandatory checklist. Trainees should not be expected to provide answers to each of the guidance questions listed.
Before action
- What is the clinical significance of measuring ethylene glycol, ethanol, and methanol? In what clinical scenarios are these assays critical?
- What chromatographic techniques (e.g., Gas Chromatography) are used in your laboratory for the analysis of ethylene glycol, ethanol, and methanol? What are the principles of these techniques?
- What sample types are typically used for these analyses? What are the requirements for sample collection and storage to ensure analyte stability?
- What are the toxicological reference ranges for these substances, particularly in the context of poisoning? What are the metabolic effects of these compounds?
- How are these assays quality controlled within the laboratory? What types of calibrators and controls are used?
- What are the clinical manifestations of poisoning with ethylene glycol, ethanol, and methanol? How do laboratory results correlate with clinical presentation and guide treatment?
- What challenges do you anticipate in the analytical procedures or the interpretation of results in complex clinical cases?
- Review the Standard Operating Procedures (SOPs) for the analysis of ethylene glycol, ethanol, and methanol, including sample preparation, instrument operation, and data analysis.
- Read relevant literature on the toxicology of these alcohols, including their metabolic pathways, clinical effects of poisoning, and the interpretation of laboratory findings.
- Consider potential difficulties in understanding the chromatographic principles or correlating the results with clinical scenarios and think about how you might address them.
- Reflect on your current knowledge of toxicology and chromatographic techniques. Are there any specific aspects of these analyses or their interpretation where you feel less confident?
In action
- What is your involvement in performing the chromatographic analysis for the chosen toxic alcohol(s). What specific stages of the analysis are you undertaking (e.g., sample preparation, instrument setup, data acquisition)? Why are these stages critical for accurate measurement?
- How are you monitoring the chromatogram for quality and resolution?
- When interpreting the chromatograms and quantitative results, what are the key indicators for the presence and concentration of the toxic alcohol(s)? What reference ranges or toxicological cut-offs are you considering?
- Are there any technical issues with the instrument or the method?
- When interpreting the data, how effectively are you able to identify and quantify the toxic alcohol(s) present? Are you able to distinguish between different alcohols if multiple are present?
- What can you learn about the practical application of chromatography in toxicology testing as the activity unfolds? What are the challenges and considerations for analysing volatile compounds?
- If you encounter problems with the chromatography (e.g., poor peak shape, unexpected peaks), are there troubleshooting steps you are considering?
- If the results are unexpected or if the chromatogram is complex, what further steps might you take to confirm the identity and concentration of the analyte(s)? What support or guidance might you need from senior colleagues?
- Are you performing the analysis and interpreting the results in accordance with established protocols and quality assurance procedures for toxicology testing?
On action
- Describe the chromatographic analysis you performed for the measurement of ethylene glycol, ethanol, and/or methanol. What type of chromatography was used? What were the key steps involved in the sample preparation and analysis? What were the results obtained for the analytes you measured? How did you interpret these results in the context of potential toxicity?
- What did you learn about the principles and practical application of chromatographic techniques in toxicology testing?
- How did this activity enhance your understanding of the metabolism and toxic effects of ethylene glycol, ethanol, and methanol?
- What did you learn about the interpretation of these analytes in cases of suspected poisoning or overdose?
- Were there any challenges in performing the assay or interpreting the chromatograms? What did you learn from these?
- How will you apply your understanding of chromatographic analysis in future toxicology testing? What considerations will you keep in mind regarding the identification and quantification of volatile compounds?
- Are there any aspects of toxicology screening for these substances that you need to further explore? What resources or guidelines will you refer to for performing and interpreting these toxicology assays?
- Describe the chromatographic analysis you performed for the measurement of ethylene glycol, ethanol, and/or methanol. What type of chromatography was used? What were the key steps involved in the sample preparation and analysis? What were the results obtained for the analytes you measured? How did you interpret these results in the context of potential toxicity?
- What did you learn about the principles and practical application of chromatographic techniques in toxicology testing?
- How did this activity enhance your understanding of the metabolism and toxic effects of ethylene glycol, ethanol, and methanol?
- What did you learn about the interpretation of these analytes in cases of suspected poisoning or overdose?
- Were there any challenges in performing the assay or interpreting the chromatograms? What did you learn from these?
- How will you apply your understanding of chromatographic analysis in future toxicology testing? What considerations will you keep in mind regarding the identification and quantification of volatile compounds?
- Are there any aspects of toxicology screening for these substances that you need to further explore? What resources or guidelines will you refer to for performing and interpreting these toxicology assays?
Beyond action
- Since performing these chromatographic analyses, have you gained a deeper understanding of the principles of chromatography and its application in toxicology? Reflect on any clinical cases of suspected poisoning with these substances that you have since encountered or learned about.
- How does your initial experience with the assays relate to the clinical management of these cases? Consider if you have learned about different analytical techniques for measuring these substances. How does your experience with chromatographic analysis compare?
- Has your hands-on experience with chromatographic analysis enhanced your understanding of the importance of sample preparation and instrument maintenance for accurate results?
- Has your initial interpretation of these assays made you more aware of the reporting requirements and the clinical implications of detecting these toxic alcohols?
- Has this training activity influenced how you approach quality control or troubleshooting for other chromatographic methods used in the laboratory?
- If you are involved in developing or optimising analytical methods for toxicology screening, how will your initial experience with these assays inform your work? Could the skills you developed be applied to other areas of analytical chemistry within the laboratory?
Relevant learning outcomes
| # | Outcome |
|---|---|
| # 1 |
Outcome
Analyse drugs, vitamins and trace elements in various biological matrices via quantitative and qualitative assays using automated and manual methodologies. |
| # 2 |
Outcome
Apply the appropriate investigative strategy to clinical situations which may involve drugs or poisons, advising clinical teams on the appropriate course of action. |
| # 5 |
Outcome
Demonstrate the application of pharmacokinetics and pharmacogenomics in therapeutic drug monitoring. |
| # 6 |
Outcome
Illustrate how toxicology results are used in clinical practice and the legal consequences of drug testing in various settings. |