Tyler did I miss something

Blood doping is against the rules regardless of whether you push the Hct too
high or not, i.e. the Hct could have been 40.
--
Mike Murray

"wannagofast" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

What was Tyler's hemocrit level. Would they have not tested that and if

Quoted message said:

50% dq'd him from the event? Or was that test before they drew the blood

for the blood doping tests?

Mike Murray said:

Blood doping is against the rules regardless of whether you push the Hct too
high or not, i.e. the Hct could have been 40.
--
Mike Murray

"wannagofast" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

What was Tyler's hemocrit level. Would they have not tested that and if

Quoted message said:

50% dq'd him from the event? Or was that test before they drew the blood

for the blood doping tests?

The blood crit level test would be a highly correlative indicator of whether this new homologous packing test read accurately or whether it is gave a false positive.

If the crit level was low, the test is probably flawed-you wouldn't surrepticiously receive a blood donation except to raise your crit level.

If Tyler was just below the legal crit level, the new test probably showed a true positive for cheating.

meb said:

If the crit level was low, the test is probably flawed-you wouldn't surrepticiously receive a blood donation except to raise your crit level.

If Tyler was just below the legal crit level, the new test probably showed a true positive for cheating.

Unless he was starting from a low haematocrit.
Unless he did haemodilution before the test (ie took in lots of fluids - either IV or oral - to temporarily reduce his Hct so that it did not read high).

"Mike Murray" <[email hidden]> wrote in message news:<LGY6d.181995$3l3.136682@attbi_s03>...

Quoted message said:

Blood doping is against the rules regardless of whether you push the Hct too
high or not, i.e. the Hct could have been 40.
--

True. But I think what the original poster was getting at was blood doping
is all about increasing red blood cell ratio, without EPO.

His claims of innocence would be more credable with a Hct of 38% rather than
48%.

meb said:

If the crit level was low, the test is probably flawed-you wouldn't
surrepticiously receive a blood donation except to raise your crit
level.

If Tyler was just below the legal crit level, the new test probably
showed a true positive for cheating.

Why would it be the case that a blood transfusion would increase the Hct %?

"Stewart Fleming" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

meb said:

If the crit level was low, the test is probably flawed-you wouldn't
surrepticiously receive a blood donation except to raise your crit
level.

If Tyler was just below the legal crit level, the new test probably
showed a true positive for cheating.

Why would it be the case that a blood transfusion would increase the Hct

%?

Just a guess, but wouldn't they spin the blood to separate the plasma from
the RBCs, then infuse the concentrated 'good' stuff?

Carl Sundquist said:

"Stewart Fleming" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

meb said:

If the crit level was low, the test is probably flawed-you wouldn't
surrepticiously receive a blood donation except to raise your crit
level.

If Tyler was just below the legal crit level, the new test probably
showed a true positive for cheating.

Why would it be the case that a blood transfusion would increase the Hct

%?

Just a guess, but wouldn't they spin the blood to separate the plasma from
the RBCs, then infuse the concentrated 'good' stuff?

Usually.

But even if you didn't centrifuge, you'd be hyper-hydrated so your kidneys and sweat glands would remove the excess water from the blood.

Carl Sundquist said:

"Stewart Fleming" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

meb said:

If the crit level was low, the test is probably flawed-you wouldn't
surrepticiously receive a blood donation except to raise your crit
level.

If Tyler was just below the legal crit level, the new test probably
showed a true positive for cheating.

Why would it be the case that a blood transfusion would increase the Hct

%?

Just a guess, but wouldn't they spin the blood to separate the plasma from
the RBCs, then infuse the concentrated 'good' stuff?

I'm guessing that the performance enhancement simply comes from improved
oxygen transfer due to greater volume of blood in the body rather than
increased Hct.

I base this on various informal observations
- testosterone stimulates RBC production
- elite athletes have larger blood volumes than untrained individuals
- there are mechanisms at work other than RBC/EPO that optimize oxygen
transfer to working muscle

If someone can indicate more formally that a blood transfusion does
actually increase Hct, then I'll withdraw this guess.

meb said:

Usually.

But even if you didn't centrifuge, you'd be hyper-hydrated so your kidneys and sweat glands would remove the excess water from the blood.

The red blood cells remain for months. The blood's excess water carrier would be removed over a period of hours.