|
|
Statistics on causes of unstatifactory samples
| Reason |
1998
No. - % |
1999
No. - % |
2000
No. - % |
| Blood clots on surface |
201 - 25% |
252 - 21% |
322 - 28% |
| Incomplete saturation |
216 - 27% |
313 - 27% |
311 - 27% |
| Filter paper damaged |
90 - 11% |
215 - 18% |
216 - 19% |
| Blood layered on surface |
32 - 4% |
72 - 6% |
76 - 7% |
| Blood applied on both sides |
53 - 7% |
15 - 1% |
6 - 0.5% |
| Sample delayed by mail |
45 - 6% |
44 - 4% |
17 - 1.5% |
| Contamination |
105 - 13% |
122 - 10% |
77 - 7% |
| Blood on tan cover |
14 - 2% |
26 - 2.5% |
26 - 2% |
| QNS to complete testing |
0 - 0% |
2 - 0.5% |
4 - 0.3% |
| Other |
38 - 5% |
112 - 10% |
100 - 8% |
Total Unsatisfactory
Percent of All Samples |
794 - 100%
1.2% |
1173 - 100 %
1.6% |
1155 - 100%
1.7% |
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