Comparison of VACUETTE Serum Gel Z Tubes with VACUETTE Serum Gel Tubes for Hormones

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Comparison of VACUETTE Serum Gel Z Tubes with VACUETTE Serum Gel Tubes for Hormones Background: Greiner-Bio-One, Austria has sold plastic evacuated tubes (VACUETTE ) for venous blood collection since 1986. VACUETTE Gel Tubes incorporate an inert gel material into the blood collection tube. These gels have a controlled viscosity and a specific gravity intermediate to serum and clot. During centrifugation, the gel material forms an impermeable barrier between the serum and clot. Gel Z has been in development since 2001 and has the same components as the last gel type (Gel P3), the difference being the production process, which has been optimised. The gel might be slightly more yellow in colour however provides the better performance than the last gel type as well as providing the advantage of a more stable barrier, which is particularly beneficial during transport. Preanalytical handling remains the same and does not require any changes (i.e. centrifugation conditions, storage, transport, etc). Study Objective: The aim was to show equality of the performance of Gel Z and the current gel type (Gel P3) with regard to a variety of hormone parameters. Study design: Two tube types were evaluated in this study: 16/100mm Serum Gel Z Tube with 8ml draw (item # 455071Z) 16/100mm Serum Gel P3 Tube with 8ml draw (item # 455071) Venous blood was collected from 20 patients using the VACUETTE Standard Tube Holder and 21G Needle. Two tubes were collected from each patient (one 455071Z and one 455071). Directly after venipuncture, the tubes were carefully inverted 8 times according to the instructions given by the tube manufacturer. The samples were left at RT for 30 minutes to let them clot completely. The clotted samples were centrifuged at 1800g for 10 minutes in a swing out centrifuge. The analysis was performed on Centaur by Bayer with the accompanying reagents by Bayer. The following hormone parameters were compared: Alpha-Fetoprotein (AFP) IgE Carcinoembryonic Progesterone Antigen (CEA) Cortisol Prolactin Prostate-specific ß-Estradiol Antigen (PSA) Folic acid Triiodothyronine (T3) Free T3 Testosterone Free Thyroxin (T4) TSH FSH Vitamin B12 Results / Comments: Statistical evaluation: Student s T-test (α 5) was performed using Biosoft STAT200 software. No statistical significance was observed with any parameter tested. Comments: No statistical difference and no clinical significance were observed with any parameter tested. Conclusion: This test examined the performance of Gel Z in comparison to the Gel P3 tubes. Therefore 16 common hormone parameters were tested. The Gel Z tubes gave equivalent results to the Gel P3 tubes for these parameters. This proves the equality of the performance of Gel Z and the current gel type (Gel P3), maintaining barrier integrity and stability post centrifugation. References: (1) Thomas L., Labor und Diagnose. TH-Books, 5. Auflage (1998) (2) Tietz N.W., Clinical Guide to Laboratory Tests. W.B. Saunders Company, third edition (1995) (3) Guder W.G., Narayanan S., Wisser H., Zawta B., Samples: From the Patient to the Laboratory. GIT Verlag (1996) (4) NCCLS EP 9-A2, Method comparison and Bias Estimation using patient samples; Approved Guideline (5) Heil W., Schuckließ F., Zawta B., Referenzbereiche für Kinder und Erwachsene - Präanalytik. 4. Auflage (1996) (6) Meyer J.G., Bellwinkel S., Labormedizin Klinische Chemie, Immunologie, Hämatologie, Mikrobiologie. Deutscher Ärzte Verlag, 4. Auflage; 170-171 (1990) 1

Alpha-Fetoprotein Normal range: 0-8.6 ng/ml 18 16 14 12 10 8 6 4 2 Gel Z 3,3 3,7 2,1 3,7 126,7 186,2 4,7 8 4,3 3,5 2,7 4 5,4 2,3 2,4 3,6 2,4 12,7 2,3 2 19,3 Gel P3 4 3,7 2,1 3,7 129,5 182,7 4,5 8,7 4,8 2,7 3,1 4,7 5,4 2,5 2,9 3,4 2 12,7 2,7 1,8 19,38 Carcinoembryonic Antigen Normal range: 0-3 ng/ml Gel Z 1,2 0,5 0,7 0,9 0,9 1 2 0,6 3,8 2,7 1,1 0,7 0,6 0,4 1,7 0,3 1,2 0,6 0,1 0,7 9 Gel P3 1,4 0,5 0,8 1 0,9 1,4 2 0,7 3,7 2,6 1,1 0,7 0,6 0,4 1,7 0,3 1,2 0,6 0 0,6 1,11 Cortisol 0,8 Normal range: 0.14-0.69 µmol/l 0,6 [µmol/l] 0,4 0,2 Gel Z 0,55 0,41 0,24 0,36 0,63 0,41 0,22 0,36 0,36 0,28 0,29 0,57 0,53 0,5 0,52 0,43 0,55 0,33 0,48 0,3 0,41 Gel P3 0,55 0,37 0,24 0,37 0,73 0,4 0,22 0,32 0,31 0,3 0,26 0,55 0,56 0,49 0,48 0,44 0,52 0,32 0,5 0,29 0,411 Student s t-test was performed at 5%: No statistical significance was observed 2

Estradiol Normal range: (male) 0-45 pg/ml; (female): 0-750 pg/ml 1000 900 800 700 600 [pg/ml] 500 400 300 200 100 0 Gel Z 39,3 29,5 N/A 35,1 1009 8022,6 467 28,2 35,1 40,9 39,8 26 25,7 21,9 32,2 182,1 18,7 61,7 33,8 189,5 561,7 Gel P3 24,6 21,3 N/A 30,1 1012 9262,7 461 29,9 34,2 40,7 44,6 18,9 21,8 23,2 34,8 196,7 21,9 62,7 35 191,3 605,7 Folic acid Normal range: 12.19-45.4 nmol/l 6 5 4 [nmol/l] 3 2 1 Gel Z 14,22 15,68 14,92 4,93 55 8,28 23,48 12,34 5,65 15,07 9,86 14,65 22 18,3 33,2 9,62 17,7 21,64 14,58 31,51 18,18 Gel P3 14,16 15,68 15,28 5,59 62,9 9,68 22,9 11,79 5,53 16,71 10,21 14,29 23,4 17,68 40,2 11,21 18,6 22 17,56 27,26 19,08 free Triiodothyronine Normal range: 0.59-1.74 ng/ml [ng/mll] Gel Z 2,3 2,11 2,97 2,38 3,1 3,14 2,77 2,71 2,69 2,92 2,78 2,92 4 2,55 2,98 3,56 3,65 2,85 2,91 3,72 2,9 Gel P3 2,31 6 8 2,46 3,12 3,19 3 2,75 2,85 1 2,82 2,86 3 2,66 2,88 3,55 3,55 2,84 2,88 3,67 2,92 3

Free Thyroxin Normal range: 0.75-2 ng/dl 1,8 1,6 1,4 1,2 [ng/dl] 0,8 0,6 0,4 0,2 Gel Z 1 1,51 1,26 1,33 3 1,4 1,42 1,21 1,47 1,62 1,17 1,54 1,5 1,28 1,29 1,49 1,67 1,57 1,23 1,73 1,39 Gel P3 0,96 1,5 1,25 1,36 3 1,37 1,48 1,22 1,49 1,58 1,17 1,52 1,48 1,29 1,29 1,51 1,7 1,58 1,31 1,73 1,39 FSH Normal range: 1-12 mlu/ml 8 7 6 [mie/mll] 5 4 3 2 1 Gel Z 25,7 79,6 1,8 22,9 0,1 0,1 5,6 53 64,6 3,9 3,2 68,1 28,2 83,2 5,9 11,1 80,2 5,1 2,8 2,3 27,37 Gel P3 26,6 79,4 1,8 23,5 0,1 0,1 5,4 52,5 65 4,3 3,2 70,1 27,8 76,9 5,8 12,1 71,5 4,9 2,8 2,6 26,82 IgE Normal range: 20-100 IU/ml 100 90 80 70 60 [IU/ml] 50 40 30 20 10 Gel Z 26,7 277,3 42,2 994,7 0 33,4 5,5 0 0 231,3 21,4 21,3 16,2 4,5 1 17,3 24,5 3,2 64,9 20,2 90,28 Gel P3 27,8 270,6 44,3 1043,2 0 36,1 5 0 0 212,7 22,4 20,2 16,8 5,1 0,8 16,8 23,2 2,9 65,3 20,2 91,67 4

Progesterone Normal range: 0.1-1 ng/ml 12 10 8 6 4 2 Gel Z 0,45 0,18 0,3 0,52 80,2 129,61 0,91 0,4 0,3 0,4 0,83 0,53 0,73 0,35 0,44 1,23 0,22 0,37 0,61 8,48 11,35 Gel P3 0,57 0,22 0,72 0,53 65,3 128,7 0,9 0,52 0,55 0,42 7 0,46 0,69 0,32 0,45 1,12 0,2 0,35 0,52 8,73 10,62 Prolactin 18 Normal range: 1.6-23.1 ng/ml 16 14 12 10 8 6 4 2 Gel Z 11,9 12,4 21,1 7,5 140,1 169,5 12 6,3 6,3 6,7 13,9 8,4 14,5 10,7 8,8 14,9 17,8 12,1 100,5 14,8 30,51 Gel P3 11,8 12 21 8 165,1 160,6 12,2 6,4 6,3 6,4 13,9 8 14,9 10,6 8,9 15,4 17,1 11,5 103 14 31,36 Prostate-specific Antigen 4,5 Normal range: 0-2.5 ng/ml 3,5 2,5 1,5 0,5 Gel Z 3,88 0 0 1,43 1 1 0 0 1 0,35 0,56 0 0 0 0,79 1 0 0 6 0 0,405 Gel P3 6 0 0 1,49 1 1 4 0 1 0,34 0,56 0 0 0 0,76 0 0 0 1,14 0 0,421 5

Triiodothyronine total Normal range: 0.59-1.74 ng/ml 1,5 0,5 Gel Z 1,57 1,33 0,92 0,67 1,8 1,38 1,46 2 6 1,14 1,34 1,36 6 1,21 8 1,21 4 0,99 1,17 1,43 1,21 Gel P3 1,45 1,32 0,95 0,7 1,84 1,42 1,69 9 5 1,13 1,29 1,45 1 1,2 9 1,19 1 0,96 1,19 1,45 1,224 Testosterone 6,0 Normal range: 3-10.5 ng/ml 5,0 Gel Z 1 0,47 0,48 2,68 1,7 0,54 0,68 0,3 0,81 4,35 5,02 0,56 0,69 0,46 2,46 0,77 0,7 0,34 5,52 0,61 1,607 Gel P3 2,94 0,5 0,49 2,78 1,79 0,53 0,67 0,31 0,84 4,73 4,58 0,53 0,66 0,46 2,3 0,72 0,59 0,32 5,54 0,65 1,597 TSH 5,0 Normal range: 0.47-3.5 µu/ml [µu/mll] Gel Z 0,65 3 0,95 0,98 1,55 1,81 4 1 0,5 1,55 1,59 1,49 4,42 0,74 9 1,88 2,52 0,92 3,28 0,95 1,547 Gel P3 0,63 0,93 0,93 1 1,51 1,88 4 2 0,51 1,56 1,73 1,47 4,25 0,77 2,9 1 2,29 0,89 3,41 8 1,541 6

Vitamin B12 250 Normal range: 200-900 pg/ml 200 150 [pg/ml] 100 50 Gel Z 300 326 617 2449 249 493 507 1619 1123 382 301 635 441 2480 702 485 535 363 615 533 757,8 Gel P3 316 315 559 2450 246 563 489 1567 1192 434 301 612 454 2450 677 501 513 363 640 549 759,6 7