Day 1 Flashcards
What scientific law is alcohol breath testing based on?
Henry’s law
Breath : blood ratio ?
At 34 degrees Celsius, 2100 parts of deep lung air contain the same a mouth of alcohol as 1 part part of blood.
Why is it necessary to analyze a sample of deep lung air when is determining a blood alcohol concentration ?
The concentration of alcohol is proportional to the concentration of alcohol in the blood
Sample acceptance criteria for the Intox EC/IR II include :
1) minimum flow rate of 12 L/min (0.2 L/sec) and,
2) minimum volume of 1.5 L, and
3) a 5% drop in flow rate after minimum volume is reached
What’s the primary and secondary purposes of the Fuel Cell?
Primary purpose is for B.A.C determination by analyzing the breath or alcohol standard sample.
Secondary purpose is to determine if there are interfering substances present in the breath sample.
What mesures the flow rate of a breath sample ?
The Pressure sensor.
What’s the criteria of a proper breath test (P.B.T) ?
- Two suitable breath samples which agree within 20 mg% of each other
- Two diagnostics tests that have passed
- Two alcohol standard test within 10% of the target value
What are the five phases of a breath test procedure ?
- Observation period (15 continuous minutes)
- Information gathering
- Data entry
- Breath test analysis
- Final check
What’s the simulator’s temperature?
In between 33.8 and 34.2 Celsius
How many subjects can you test simultaneously ?
Instrument can manage 4 subjects which can provide 4 samples each. Operator can exit the countdown screen and work on the second subject while the first one wait.
What’s the main purpose of infrared system ?
Serves to detect alcohol in the mouth
What are the three factors that can affect a result ?
- Breath temperature (ex: fever where each degree over the normal body temperature can increase your result by 9%
- Mouth alcohol
- Shallow blow (not deep lung air)
What are the 5 documented logs ?
- Personal log
- Instrument Usage Report
- Maintenance Log
- Alcohol Standard Change Log
- Breath test Bulletins
What’s the heated simulator used for ?
To draw air from the simulator into the instrument.
How does a QT recognize that he’s obtaining a sample of deep lung air ?
Hearing a constant tone and,
«Press R for refusal» disappears from display.
How many samples on a supervisor Test when replacing Dry Gas can ?
5
Name two features that protect the intox EC/IR II from radio frequency interference.
- Faraday cage over detector board
- Continuous metal casing of the instrument (sealing)
What are the 5 points on the WET BATH to ensure the standard is suitable for use with an approved instrument?
- Two certificat of analysts
- Placed in a simulator and at a temperature within 33.8 and 34.2
- Use doesn’t exceed 50 Alcohol Standard tests
- Use doesn’t exceed 15 days in a simulator
- Used before the expiry date on the bottle
What are the 5 points on the DRY GAS to ensure the standard is suitable for use with an approved instrument?
- Two certificates of analysts
- Used at a cylinder of 50 psi or more
- Used before the expiry date of the cylinder
- Stabilized at room temperature for at least 24 hours
- The freeze indicator shows cylinder hasn’t freeze during transport
What causes an ambient condition status ?
An infrared absorbing substance is present in the sample chamber during the purge; the IR detector or fuel cell output is unstable
What are the three substances that have a reaction on the fuel cell ?
- Ethanol
- Methanol
- Isopropanol
Explain «Henry’s law»
At 34 degrees, the deep lung air contains a concentration of alcohol proportional to the concentration of the alcohol in the blood
In order for a substance to increase a breath test result, it must be :
- Volatile
- Non-toxic
- Present in the breath in sufficient quantities and,
- Produce a reaction on the fuel cell output
How to properly conduct the observation period ?
Search the subject (mouth and person)
Keep subject at close proximity to observe any burps, consumption or vomiting
Name 4 supervisor’s role :
- Keeping all records and logs in order,
- Ensure the instrument receives annual servicing,
- Ensure adequate supplies are maintained,
- Periodically review breath test reports and certificates
What actions can be taken with the «OPER» password :
- Test Subject
- Quick Test (F2)
- Print last test (P)
Name 4 factors that can affect the rate of absorption of alcohol :
- Amount of food in stomach
- Concentration of alcohol in the beverage
- Rate of consumption
- Drugs, diseases and emotional states
What effect does the alcohol have on the body ?
It works as a Central Nervous System (CNS) depressant
Describe the Quality Assurance
It’s the documentation process of a scientific procedure
Describe what’s the Quality Controle
It’s a check of our quality assurance system = Alcohol Standard Test
Name 4 other composent of Quality Control ?
- Standard operating procedure
- Standardized training for qualified technicians
- Proficiency testing
- Documentation
