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Clinical Schemes

LGC Standard’s clinical proficiency testing schemes, or external quality assessment schemes as they are often referred as, deal principally in the area of drug monitoring, whether they are deliberately administered drugs for therapeutic purposes; toxic drugs deliberately or accidentally ingested which could cause harm; or drugs of abuse which may be analysed for clinically significant levels, or for workplace monitoring.

Due to the importance of results obtained, it is essential that laboratories are able to demonstrate their testing is dependable, reproducible and accurate; otherwise mistakes can have a major impact on patient care, legal and forensic investigations, occupational monitoring, insurance screening and more.

Participation in LGC Standards clinical schemes will provide valuable feedback to laboratories/on-site screening clinics who undertake these analyses, and enable them to demonstrate their performance over time using the trend reports available through our PORTAL system.

  

Drugs of abuse in hair scheme (DAH)

daps 

  

  • Currently not included in our UKAS scope of accreditation
  • Human segmented hair impregnated with drugs of abuse and metabolites
  • Amfetamine group, Benzodiazepine group, Cannabinoids (THC), Cocaine group, Opiate group

  

Drugs of abuse in urine scheme (DAU)

daps

 

  • UKAS accredited proficiency testing scheme
  • External Quality Assessment (EQA) designed for laboratories and on-site screening clinics that provide routine services for detection of drugs of abuse in urine
  • Participants receive sets of three test materials at quarterly intervals
  • Test materials consist of either 5ml or 15ml aliquots of freeze-dried urine
  • Mixtures of drugs with their metabolites from 6 major classes:-
    - Amfetamines & stimulants 
    - Cannabinoids
    - Cocaine & metabolites
    - Minor tranquillizers
    - Non-opiate narcotics
    - Opiates
  • Participants select to make their reports relative to one of two sets of threshold drug concentrations
    -First, are cut-offs specified by the scheme as appropriate for routine clinical investigations
    -Second and more rigorous set of thresholds are those defined in the European Laboratory Guidelines for Legally Defensible Workplace Drug Testing version 1.0, 2002

  

Drugs of abuse in oral fluid scheme (DOF)

daps

 

  • UKAS accredited proficiency testing scheme
  • External Quality Assessment (EQA) designed for laboratories and on-site screening clinics that provide routine services for detection of drugs in oral fluid
  • Participants receive sets of three test materials at quarterly intervals with 4 weeks being allowed for drug analysis
  • Test materials consist of 1.7ml oral fluid obtained from volunteers and known drug users
  • Mixtures of drugs with their metabolites from 6 major classes:-
  • - Amfetamines & stimulants 
    - Cannabinoids
    - Cocaine & metabolites
    - Minor tranquillizers
    - Non-opiate narcotics
    - Opiates
  • Participants select to make their reports relative to one of two sets of threshold drug concentrations

  

Immunosuppressant Scheme (IPT)

daps

 

  • UKAS accredited proficiency testing scheme
  • Human blood and human plasma
  • Ciclosporin and Tacrolimus, Everolimus, Mycophenolic acid, Sirolimus.

   

 

 

 

Therapeutic drugs (TDM)

daps

 

  • UKAS accredited proficiency testing scheme
  • External Quality Assessment (EQA) designed for laboratories and clinics who are involved in the routine quantification of therapeutic drugs in serum
  • Test materials comprise human serum, urine, newborn calf serum, and human blood/plasma
  • TM rounds include: Antiepileptic drugs mixture, Cardiac drugs mixture, Analgesic mixture, Drugs for the treatment of substance related disorders 1 and 2, Psychoactive drugs, Smoking related drug, Immunosuppressive drugs
  • AT rounds include: Antibiotic drugs (these analytes are produced in collaboration with the UKNEQAS for antibiotics drugs)
  • Participants receive test materials at monthly and quarterly intervals

 

 

Toxicology scheme (TOX)

daps

 

  • UKAS accredited proficiency testing scheme
  • External Quality Assessment (EQA) designed for laboratories and clinics that provide pathology and toxicological service, or forensic investigation for drug and ethanol determination
  • Quantitative analysis: 
    - Blood (carboxyhaemoglobin, ethanol, paracetamol and salicylic acid) 
    - Serum (ethanol, paracetamol and salicylic acid)
    - Urine (Gammahydroxybutyrate (GHB) and ethanol)
    - Lyophilised serum samples for a range of drugs
  • Toxicology case studies: 
    - Human serum and urine test material accompanied by a clinical or forensic scenario requiring interpretation
  • Toxicology in blood: - Human blood for quantitative measurement of specified analytes (opiates, opioids, benzodiazepines, tricyclics, SSRIs, antipsychotics and other compounds that may be monitored in cases of drug overdose)
  • Toxic alcohols
    - Acetone, Ethanol, Ethylene glycol, Isopropylalcohol (IPA), Methanol