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317-841-0458 317-841-3186 Analytical Control Systems, Inc.
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One of the most important factors in the management of patients who have been subjected to surgical intervention, dialysis and other highly disruptive procedures is the control of hemostasis. An important test used to assess hemostasis is the whole blood clotting time or the ACT test (Activated Clotting Time). This test can be performed near the patient without waiting for laboratory personnel to come, draw the sample, and return to the laboratory to run the required tests. However, because the ACT test is very different in nature and in use from traditional plasma tests, unique problems can arise.
A valuable aid to the coagulation user in any testing situation is the use of a quality control material. To the ACT test user, this is even more important. Availability of such a material enables the user to determine whether the instrument is functioning properly, whether one's technique is consistent from test to test and whether everyone using the instrument is doing so in a consistent manner. Judicious use of a quality control material will eliminate the need for repeating the test and will give the user more confidence in the result. However, in order for quality assurance to provide the best possible aid, a good control must be used. This quality control must be stable enough to survive shipping, storage and testing time; it must have consistent testing times; it must be sensitive enough to pick up system errors; it must be similar enough to normal samples so that the user's testing habits can be monitored; it must be available for bulk purchases with a single lot number; and, it must be cost efficient.
ACS's ACT-Trol provides all these advantages and more. It's animal based matrix (designed to perform like fresh human samples) combines the advantage of being free from human pathogens with all of the above mentioned stability and performance characteristics. ACS's philosophy towards customer service helps increase the usefulness of this product. For instance, controls from the same lot can be set aside when a customer commits to purchase a year's supply of ACS's ACT-Trol controls. With this one year's purchase comes a free technical assistance program, In-Service, where a customer can request that an ACS representative come and help train personnel. In addition, ACS offers In-Sure, its quality assurance program, also free of charge, when a customer commits to purchase a year's supply of ACS's ACT-Trol controls.
Quality Control Features Stability ACS's ACT-Trol demonstrates superior stability characteristics.
M ost quality control materials are supplied as lyophilized powders. Because ACS has extensive experience in the manufacture and lyophilization of stable proteins and enzymes, the customer benefits from stable coagulation products. The stability of the reconstituted ACT-Trol is measured in hours, not minutes, the unreconstituted room temperature stability is seven days and refrigerated shelf life is up to 3 years.
Quality Control Features Consistency A year's supply of the same lot number of ACT-Trol Sets may be purchased, increasing its already high consistency even more.
Level I of the ACT-Trol has normal times for kaolin, celite and glass activators and certain specialty reagents. Level II has mildly prolonged times for kaolin, celite and glass activators and certain specialty reagents. Level III is set at extremely prolonged times on kaolin, celite and glass activators and certain specialty reagents. All of these controls show remarkable consistency, even on different instrument brands. The data for multiple customers (with different training levels in quality control technique) are shown below.
Typical Customer Test Results Level I Consistency Customers report results that demonstrate ACS's ACT-Trol is one of the most stable and consistent controls available.
Data 12 Mean 130.8 seconds SD 12.1 CV 9.3% Table 12. Level I ACT-Trol was used at ACS location 2C-3 by nursing personnel for four years. Table 10 shows typical quality control results. Tests were performed on the Hemochron Instrument.
Data: 18 Mean 93.3 seconds SD 9.3 CV 9.9% Table 13. Level I ACT-Trols were run at ACS location 7A-2 by point-of-care personnel. Table 11 shows typical results (for HR cartridges). Tests were performed on the HemoTec Instrument.
Data 15 Mean 79.63 SD 4.8 CV 6.0% Table 14. Level I ACT-Trols were run at ACS location 8 by point-of-care personnel. This table shows typical results (for LR cartridges). Tests were performed on the HemoTec Instrument.
Typical Customer Test Results Level II Consistency Level II of ACT-Trol performs with the same level of accuracy and consistency as Level I. Customers repeatedly find that both levels perform to the same high standards.
Data 13 Mean 206.6 seconds SD 13.9 CV 6.7% Table 15. Level II ACT-Trol was used at ACS location 2C-3 for four years by nursing personnel. Table 13 shows typical quality control results. Tests were performed on the Hemochron Instrument.
Data 18 Mean 438.1 seconds SD 32.1 CV 7.3% Table 16. Level II ACT-Trols were run at ACS location 7A-2 by point-of-care personnel. Table 14 shows typical results (for HR cartridges). Tests were performed on the HemoTec Instrument.
Data 15 Mean 322.1 SD 17.1 CV 5.3% Table 17. Level II ACT-Trols were run at ACS location 8 by point-of-care personnel. This table shows typical results (for LR cartridges). Tests were performed on the HemoTec Instrument.
Typical Customer Results Level III Consistency Level III of ACT-Trol is remarkably consistent especially considering its extremely prolonged times. Level III HemoTec configured controls are set at about 500 hundred seconds. Level III for the Hemochron (set in the 300s) is shown below.
Data 15 Mean 310.53 SD 8.4 CV 2.7% Table 18. Level III ACT-Trol was used at ACS location 0 by quality control personnel. Table 16 shows typical quality control results. Tests were performed on the Hemochron Instrument.
The data above was generated by running Hemochron's CA 510/FTCA 510 type of assay tubes. Although the range is slightly different because of the different activator, there is little difference in consistency and stability between Hemochron assay tube types. The same Level III control as above when run on P214/P215 type of tubes for the Hemochron gave results as follows: Data 15 Mean 287.53 SD 13.2 CV 4.6%
Data for CA 510/FTCA 510 type of tubes for the Hemochron is very consistent. ACT-Trol when performed on the P214/P215 assay tubes has a slightly different range but is just as tight in its range.
Hemochron is a registered trademark of International Technidyne Corporation. HemoTec is a registered trademark of Medtronic HemoTec Inc.
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