Because each tissue block has its own characteristics regarding fixation and processing some of which can influence the reactivity. If you have a bank of negative controls, how can you be sure that any of those blocks have received exactly the same treatment and reacted in the same way to the test block? The same goes for any bank of positives, so that is why you should have a positive control section in the same slide as the test section. René J.
--- On Fri, 10/15/10, sgoe...@xbiotech.com <sgoe...@xbiotech.com> wrote: From: sgoe...@xbiotech.com <sgoe...@xbiotech.com> Subject: RE: [Histonet] negative controls To: "Sebree Linda A" <lseb...@uwhealth.org> Cc: "Histo Net list server" <HistoNet@lists.utsouthwestern.edu> Date: Friday, October 15, 2010, 11:17 AM Why do you need a negative control for each block if you are runn= ing the same antibody on each patient block? Is it just for case by c ase reference so the negative is filed with the patient slide? Why co= uldn't you have a control slide bank that was dated so all the slides you d= id on that day, on that run, could be referenced back to that control? = ; Just curious? Sarah Goebel, B.A., HT (ASCP) Histotechnician<= br> XBiotech USA Inc. 8201 East Riverside Dr. Bld= g 4 Suite 100 Austin, Texas 78744 = (512)386-= 5107 -------- Original Message -------- Subject: RE: [Histonet] negative controls From: "Sebree Linda A" <[1]lseb...@= uwhealth.org> Date: Fri, October 15, 2010 8:08 am To: "Victoria Baker" <[2]bakevict= o...@gmail.com>, "Histo Net list server" <[3]histo...@lists.uts= outhwestern.edu> We run negative controls on every block of a case within the same run. On autopsy cases, we only run 1 negative per tissue type, within the same run...this is the only exception to the rule of 1 negative per block. Linda A. Sebree University of Wisconsin Hospital & Clinics IHC/ISH Laboratory DB1-223 VAH 600 Highland Ave. Madison, WI 53792 (608)265-6596 -----Original Message----- From: [4]histonet= -boun...@lists.utsouthwestern.edu [[5]mailto:histon= et-boun...@lists.utsouthwestern.edu] On Behalf Of Victoria Baker Sent: Friday, October 15, 2010 9:26 AM To: Histo Net list server Subject: [Histonet] negative controls Hi I have a hypothetical question to those who run IHC on Ventana instruments. Are you running your negatives with your patient/test cases or on a separate run? Also, if you are doing this and have to use a different detection kit how do you work the QA/QC portion of this for CAP requirements. Thanks Vikki _______________________________________________ Histonet mailing list [6]histo...@lists.utsouth= western.edu [7]http:= //lists.utsouthwestern.edu/mailman/listinfo/histonet _______________________________________________ Histonet mailing list [8]histo...@lists.utsouth= western.edu [9]http:= //lists.utsouthwestern.edu/mailman/listinfo/histonet References 1. 3D"mailto:lseb...@uwhealth.org" 2. 3D"mailto:bakevicto...@gmail.com" 3. 3D"mailto:HistoNet@lists.utsouthwestern.edu" 4. 3D"mailto:histonet-boun...@lists.utsouthwestern.edu" 5. 3D"mailto:histonet-boun...@lists.utsouthwestern.edu" 6. 3D"mailto:Histonet@lists.utsouthwestern.edu" 7. 3D"http://lists.utsouthwestern.edu/mailman/listinfo/histonet" 8. 3D"mailto:Histonet@lists.utsouthwestern.edu" 9. 3D"http://lists.utsouthwestern.edu/mailman/listinfo/histonet" _______________________________________________ Histonet mailing list Histonet@lists.utsouthwestern.edu http://lists.utsouthwestern.edu/mailman/listinfo/histonet _______________________________________________ Histonet mailing list Histonet@lists.utsouthwestern.edu http://lists.utsouthwestern.edu/mailman/listinfo/histonet