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Author Topic: Labwork question  (Read 1382 times)

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Offline Etay1207

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  • Posts: 131
Labwork question
« on: July 30, 2010, 02:27:36 PM »
Hey all, I was looking over my labwork and noticed something I had not noticed before. The CD4 count is measured in microliters but the Viral Load is measured in milliliters. Why are they measured on different scales?
POZ since 1999
1/07 tcells: 530 vl: 72,922 7/07 tcells: 542 vl: 26,577
9/08 tcells: 339 vl: 56,120  7/09 tcells: 267 vl: 663,160
11/09 tcells: 71 vl: 498,670 2/10 tcells: 52 vl: 322,000
 no meds and feeling great!

Offline skeebo1969

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Re: Labwork question
« Reply #1 on: July 30, 2010, 02:33:56 PM »



     They'll probably measure your vl in one of these:

     
I despise the song Love is in the Air, you should too.

Offline eric48

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  • Posts: 1,175
  • @HIVPharmaCure & tinyurl.com/HIVPharmaCure
Re: Labwork question
« Reply #2 on: July 30, 2010, 06:01:05 PM »
same here

CD4 : /mm3 (which is microL)
VL  : / mL

Therefore, I guess it is standard.

Cheers

Eric


NVP/ABC/3TC/... UD; CD4 > 1000; CD4/CD8 ~ 2.0   safety stock : 2 months

Offline WillyWump

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Re: Labwork question
« Reply #3 on: July 30, 2010, 10:58:42 PM »


     They'll probably measure your vl in one of these:

    

or one of these...

POZ since '08

Last Labs-
6/3/14 CD4- 736, UD 34%
6/25/13 CD4- 1036, UD,
2/4/13, CD4 - 489, UD, 28%

Current Meds: Prezista/Epzicom/ Norvir
.

Offline PeteNYNJ

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  • When life gives you AIDS...make LemonAIDS!
    • Dance for Me, Puppets
Re: Labwork question
« Reply #4 on: August 01, 2010, 01:55:44 AM »
I think that is the standard in the US as well. 

Offline Etay1207

  • Member
  • Posts: 131
Re: Labwork question
« Reply #5 on: August 01, 2010, 08:29:05 AM »
That doesn't make sense. That's like counting tcells in an eight ounce glass and then counting your viral load in an 8,000 ounce barrel and comparing the numbers.
POZ since 1999
1/07 tcells: 530 vl: 72,922 7/07 tcells: 542 vl: 26,577
9/08 tcells: 339 vl: 56,120  7/09 tcells: 267 vl: 663,160
11/09 tcells: 71 vl: 498,670 2/10 tcells: 52 vl: 322,000
 no meds and feeling great!

Offline max123

  • Member
  • Posts: 377
  • Carpe Diem
Re: Labwork question
« Reply #6 on: August 01, 2010, 08:46:04 AM »
think in terms of relative size of the involved particles... a lymphocyte is larger than an hiv particle.
1/86 - 6/08 (annually): neg elisa
7/09: pos elisa/pos wb
8/09: cd4 560, cd4% 35, vl 13,050
12/09: cd4 568, cd4% 33, vl 2,690
4/10: cd4 557, cd4% 29.3, vl 6,440
7/10: cd4 562, cd4% 29.6, vl 3,780

Offline Ann

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Re: Labwork question
« Reply #7 on: August 01, 2010, 08:56:35 AM »
CD4 : /mm3 (which is microL)
VL  : / mL

mm3 is cubic millimeters - the volume of a cube of side length one millimetre (0.001 m) equal to a microlitre 1 mm3 = 0.000000001 m3 = 1 µL

mL is the same as CC, as a cubic centimetre is equal to a millilitre or mL.

That doesn't make sense. That's like counting tcells in an eight ounce glass and then counting your viral load in an 8,000 ounce barrel and comparing the numbers.

But nobody "compares" the numbers between VL and CD4. They are both tools or sets of information to be looked at both independently and together, but not compared. It would be like comparing apples and oranges.

If you look at the CBC sample chart found in the Lessons, you'll see that a variety of different units are used for measurement. It doesn't make it wrong.
« Last Edit: August 01, 2010, 08:59:46 AM by Ann »
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"...health will finally be seen not as a blessing to be wished for, but as a human right to be fought for." Kofi Annan

Nymphomaniac: a woman as obsessed with sex as an average man. Mignon McLaughlin

HIV is certainly character-building. It's made me see all of the shallow things we cling to, like ego and vanity. Of course, I'd rather have a few more T-cells and a little less character. Randy Shilts

Offline bocker3

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  • Posts: 3,386
  • You gotta enjoy life......
Re: Labwork question
« Reply #8 on: August 01, 2010, 01:02:43 PM »
That doesn't make sense. That's like counting tcells in an eight ounce glass and then counting your viral load in an 8,000 ounce barrel and comparing the numbers.

Why would you compare these tihngs?  If you want them in the same units -- it's simple math, so get you calculator out.  Here you go -- I'll really freak you out -- some lab tests are measured in mmol, some in micromol, some in the "strange" IU (internation units) -- at the end of the day the units matter not at all -- so long as they are standard (but even then, we do have math to fall back on).

You really do worry about the strangest things and yet show no concern where you should?

Mike
Atripla - Started 12/05
Reyataz/Norvir - Added 6/06
Labs - Pre-Meds
Sep05 T=350/25% VL98,559
Nov05 288/18%  47,564
Current Labs
May2013 691/31% <20

Offline BlueMoon

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  • Posts: 665
  • Calling from the Fun House
Re: Labwork question
« Reply #9 on: August 01, 2010, 03:32:07 PM »

You really do worry about the strangest things and yet show no concern where you should?

Mike

He's good. . . .
...................VL.....CD4.....%
-----------------------------------------
08/10-- ......<40.....290.....42
05/10-- ......<48.....290.....46
02/10-- ......<48.....481.....44
10/09-- ......<48.....277.....46
07/09-- ......<48.....300.....38
05/09-- ........51.....449.....39
03/09-- Added Isentress
02/09-- ........65.....299.....34
11/08-- ........62.....242.....40
08/08-- ........66.....212.....29
05/08-- ......202.....217.....27
03/08-- ....5210.....187.....21
02/08-- Began Truvada/Reyataz/Norvir
12/07-- 273,000.....157.....22
11/07-- 229,000.....209.....22
10/07-- Diagnosis

It's a complex world.

 


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