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1. Two syringes operated systematically to measure and draw samples and diluent are the functional equivalent of a/an:
- Electronic cell counter.
2. Identify the instrument that fixes, stains, buffers, rinses, and dries differential slides at a rate of 1 per minute.
- Electronic cell counter.
- Automatic slide stainer.
- Model S counter.
3. What property of a blood cell is utilized by the Coulter Model FN Counter to count blood cells?
- Light dispersion.
- Electrical resistance.
4. What are the advantages of using an electronic cell counter?
- It can count up to 30 to 50 counts per day.
- No training is necessary.
- Its count is equivalent to that of 120 chamber counts per specimen.
- It counts an average of 30,000 to 50,000 cells per specimen.
5. How many individual counts can an electric cell counter handle easily per day?
6. What are other advantages of an electric cell counter?
- Error rates are reduced one-tenth to that of visual methods; allowance for accuracy and reproducibility factors are about 2 needed is reduced.
- Error rates are reduced one-fifth to that of visual methods; allowance for
accuracy and reproducibility factors are about 2 needed is reduced.
- Error rates are reduces one-tenth to that of visual methods; allowance for accuracy and reproducibility factors are about 8 needed is reduced.
- Error rates are reduces one-tenth to that of visual methods; allowance for
accuracy and reproducibility factors are about 2 needed is increased.
7. When using the Coulter Model FN Counter, what is the end product once mass cells change the resistance between electrodes and alter the current flow and electronic pulses?
- The number that represents the number of blood cells and their volume in the sample being counted.
- The distance between the electrodes and the alteration of the current flow.
8. Which tests performed by the Coulter Model FN Counter must be corrected for coincidence passage?
- All WBCs tests over 10,000/cu mm.
- WBCs above 3.4 million/cu mm.
- WBCs above 5.4 million/cu mm.
- WBCs below 10,000/cu mm.
9. The incidence of Coulter Counter instrument failure can be reduced by:
- Cleaning the orifice with detergent monthly.
- Oiling the vacuum pump weekly.
- Weekly observance of the mercury travel time on the manometer.
- Dilution of high cell counts with saline.
10. What is the sequence for cleaning Coulter Model FN Counter so as to reduce the incidence of instrument failure?
- Flush orifice with dilute sodium hypochlorite (bleach). Flush the system thoroughly with saline and then distilled water.
- Flush orifice with distilled water. Flush the system with sodium hypochlorite (bleach) and then thoroughly with saline.
- Flush orifice with dilute sodium hypochlorite (bleach). Flush the system thoroughly with distilled water and then saline.
- Flush orifice with saline and the system with dilute sodium hypochlorite (bleach) and distilled water.
11. Which of the following is NOT a significant source of error with electronic particle counters?
- Mathematical mistakes.
- Dilution inaccuracies.
- Electronic interference.
12. What is a problem on an electronic counter?
- Qualitive measurements are difficult to prove because of very large sized cell layers.
- Positive impulses result from electronic problems such as interference from other machines can cause erroneous results.
- Contaminating particles in apparently clear diluent are a source of impulse. Background counts must be made daily on all diluents.
- White blood cell counts are not accurate over 8,000 per cu mm and must be diluted with saline.
13. The complete hematological systems developed encompass which hematology parameters:
- RBC count, WBC count; hemoglobin concentration; hematocrit; and mean corpuscular volume, hemoglobin, MCH, MCHC, and hemoglobin concentration.
- RBC distribution width, mean platelet volume, and a five-part differential.
- Reporting neutrophils, lymphocytes, monocytes, eosinophils, and basophils.
- All of the above.
14. The Coulter Model S Counter differs from the Coulter Model FN because it:
- Operates on different principles.
- Performs all counts in duplicate.
- Runs the WBC and RBC counts simultaneously.
- Requires only minimal maintenance.
15. If the microcapillary samples for a complete workup and unopettes are accomplished at one time, this will:
- Increase the amount of sample necessary but no more testing is necessary.
- Reduce the amount of sample necessary for this and other related procedures and enables testing for pediatric patients.
- Cause the sample dosage to remain the same.
- None of the above.
16. The Coulter Model S counts RBC and WBC counts in triplicate. If there is any disagreement due to debris or other error, how will the technician be alerted?
- A printout.
- An alarm system.
- Another technician.
- By trial and error.
17. On what piece of hardware would the CRT display all results, operator alerts, and histograms?
- Auto-reporter printer.
- S Plus III.
- Data Terminal.
18. In what form are Data Terminal control results displayed on the Coulter Model S Plus III Counter?
- Levey-Jennings graphs.
- Both a and b.
- None of the above.
19. What is the process called when differentials are performed using the Coulter Model S Plus IV Counter?
- Coded slip.
- Volumetric cytochemistry.
- Cytochemical raction.
- Data storage.
20. A cytochemical reaction:
- Alters white cell volumes in predictable ways. The resulting volumedistribution histogram is then analyzed by the computer’s program to determine numerical differential results and the detection of abnormalities.
- Sometimes alters white cell volumes in predictable ways. The resulting volume-distribution histogram is then analyzed by the computer’s program to determine numerical differential results and the detection of abnormalities.
- Is quite intricate and takes approximately two hours total time.
- Assists in interpreting suspected abnormal differential results by flagging significant abnormalities with less than 1
21. The Coulter Model S Plus V Counter differs from the Coulter Model S Plus V Model main sample aspiratior collects 125 pl samples from an automatic cap piercer. This automatic piercer:
- Speeds up the process.
- Increases the hazard of bacterial growth inside the tubes.
- Eliminates the hazard of opening and closing collection tubes.
- Collects in exact-fill.
22. Which Coulter Counter, with addition of the Data Terminal option, has the ability to handle statistical analyses at the touch of a button?
- S Plus V.
- S Plus VI.
23. Which Coulter Model Counter is designed for small labs doing only a few tests per day?
- S Plus IV.
24. Which Coulter Model Counter, with the addition of an optional printer/plotter, can profile a full 16-parameters profiles?
- S Plus IV.
- S Plus VI.
25. The Coulter Model M430 Counter is:
- A compact semi-automated system for small labs doing 30 to 50 samples per day.
- For the large laboratory.
- For small labortories doing only a few tests per day.
- Inclusive of volume referenced histograms.