"Why I am no longer a skeptic"

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I was really only questioning your statement "which is why reflexes don't resume during CPR" and your attribution of it to Parnia. Obviously that statement is mistaken in light of published scientific studies.

I don't see reflexes mentioned in that quote you have provided.

I'm not making a statement about the pupillary dilation of denture man.

I'm not making a statement that people have or do not have any clinical signs of "consciousness" during CPR.

You stated "which is why reflexes don't resume during CPR" and that is clearly incorrect. Fact. Not opinion.

I think we need to be accurate when discussing these issues.
(This post was last modified: 2017-10-10, 04:03 PM by chuck.)
I notice in the Live Science article the bit about reflexes is not a direct quote. I doubt anyone who had reviewed the literature on reflexes and CPR would state that "reflexes don't resume during CPR."
(2017-10-10, 03:56 PM)chuck Wrote: I was really only questioning your statement "which is why reflexes don't resume during CPR" and your attribution of it to Parnia. Obviously that statement is mistaken in light of published scientific studies.

I don't see reflexes mentioned in that quote you have provided.

I'm not making a statement about the pupillary dilation of denture man.

I'm not making a statement that people have or do not have any clinical signs of "consciousness" during CPR.

You stated "which is why reflexes don't resume during CPR" and that is clearly incorrect. Fact. Not opinion.

I think we need to be accurate when discussing these issues.

I didn't state anything. I quoted Parnia who is a recognised expert in this field and therefore can be relied upon as an accurate source.
(This post was last modified: 2017-10-10, 04:18 PM by tim.)
(2017-10-10, 04:07 PM)chuck Wrote: I notice in the Live Science article the bit about reflexes is not a direct quote. I doubt anyone who had reviewed the literature on reflexes and CPR would state that "reflexes don't resume during CPR."

Are you trying to suggest that Parnia didn't say that or I'm making up crap ?
(2017-10-10, 04:18 PM)tim Wrote: I didn't state anything. I quoted Parnia who is a recognised expert in this field and therefore can be relied upon as an accurate source.

This quote says nothing about reflexes during CPR.

Quote:Immediately following the cardiac arrest, the
mean arterial pressure (MAP) becomes immeasurable,
however, properly performed chest compressions
may raise the systolic values to 60–80 mmHg,
but the diastolic values and hence the mean arterial
pressure still remains inadequate

Concurrent EEG monitoring during a cardiac arrest has shown an
initial slowing of the EEG waves which then progress
to an isoelectric line within approximately 10–20 s
and remain flat during the cardiac arrest until the
resumption of cardiac out put (27, 30) In cases of
prolonged cardiac arrest, however EEG activity
may not return for many tens of minutes after cardiac
output has been returned.

Therefore during cardiac arrest impaired cerebral blood flow
leads to a lack of electrophysiological activity in
the cortex, which is made worse, as the time from
the initial period of ischaemia to adequate resuscitation
is increased. A reduction in cerebral blood
flow in humans is associated with a deterioration
in sustained attention (30) 

Immediately after resuscitation there is a period
of multifocal no-reflow, a phenomenon observed
following recovery from cardiac arrest, in which,
despite the restoration of adequate blood pressure
multiple areas of the brain have been shown to develop
perfusion defects that range from a pin hole,
up to 95% of the brain (31) This is thought to occur
due to insufficient restoration of nutritive blood
flow due to a combination of increased blood viscosity
and perivascular oedema and is related to
the initial period of ischaemia. This is followed by
a period of transient global hyperaemia lasting
15–30 min
(2017-10-10, 04:23 PM)tim Wrote: Are you trying to suggest that Parnia didn't say that or I'm making up crap ?

The article doesn't directly quote Parnia on reflexes during CPR. It is an indirect quote. Did Parnia actually say "reflexes don't resume during CPR."? We will never know unless we contact the author of the article and request a transcript. I seriously doubt he would say that given the fact that there are a couple of seemingly conclusive studies that state the exact opposite, one of them appearing I believe in Resuscitation Journal, which one could assume Parnia might read.

I don't think you are making up the fact that the article provides an indirect quote of Parnia saying that. I am suggesting that Parnia didn't use those exact words, especially since many actual quotes appear in the article and the bit about reflexes is not a direct quote. 

Why is it such a big deal to you if reflexes occur during some cases of cardiac arrest and CPR? Who cares?

Do you think accuracy isn't important when discussing these topics?
(This post was last modified: 2017-10-10, 04:53 PM by chuck.)
(2017-10-10, 04:43 PM)chuck Wrote: This quote says nothing about reflexes during CPR.

This one does.

Performing cardiopulmonary resuscitation (CPR) does send some blood to the brain — about 15 percent of what it requires to function normally, according to Parnia. This is enough to slow the brain cells' death trajectory, but it isn't enough to kick-start the brain into working again, which is why reflexes don't resume during CPR, he said.

Take it up with Parnia my "friend"
(2017-10-10, 04:59 PM)tim Wrote: This one does.

Performing cardiopulmonary resuscitation (CPR) does send some blood to the brain — about 15 percent of what it requires to function normally, according to Parnia. This is enough to slow the brain cells' death trajectory, but it isn't enough to kick-start the brain into working again, which is why reflexes don't resume during CPR, he said.

Take it up with Parnia my "friend"

You are pointing to the Live Science article! Smile

Do you understand the difference between a direct quote and an indirect quote? A direct quote is enclosed in quote marks. That is something that can be attributed word for word to the speaker. With an indirect quote the author, in this case Mindy, summarizes something that they feel Parnia has said. 

https://www.livescience.com/60593-flatli...ation.html

Even if Parnia did say that, can you see that he would be wrong given the studies I referenced? Showing pupillary response during CPR isn't like trying to find the Higgs Boson. It would seem to be pretty cut and dried.

I don't need Parnia to declare something as fact before I can draw a conclusion from some fairly straightforward published scientific studies.
(2017-10-10, 04:51 PM)chuck Wrote: The article doesn't directly quote Parnia on reflexes during CPR. It is an indirect quote. Did Parnia actually say "reflexes don't resume during CPR."? We will never know unless we contact the author of the article and request a transcript. I seriously doubt he would say that given the fact that there are a couple of seemingly conclusive studies that state the exact opposite, one of them appearing I believe in Resuscitation Journal, which one could assume Parnia might read.

I don't think you are making up the fact that the article provides an indirect quote of Parnia saying that. I am suggesting that Parnia didn't use those exact words, especially since many actual quotes appear in the article and the bit about reflexes is not a direct quote. 

Why is it such a big deal to you if reflexes occur during some cases of cardiac arrest and CPR? Who cares?

Do you think accuracy isn't important when discussing these topics?

"Why is it such a big deal to you if reflexes occur during some cases of cardiac arrest and CPR? Who cares?"

I didn't say it was a big deal. YOU made it out to be for some reason best known to yourself. I simply quoted an expert on the subject.

"Do you think accuracy isn't important when discussing these topics?"

You haven't shown Parnia's statement to be inaccurate. You've presented one paper on pigs and one other paper which doesn't look that impressive to me. I always try to be accurate when posting anything. You however are all the place depending on how you're feeling that day, or at least it seems that way to me with your odd behaviour. I thought I was on ignore ??
(This post was last modified: 2017-10-10, 05:08 PM by tim.)
(2017-10-10, 05:05 PM)chuck Wrote: You are pointing to the Live Science article! Smile

Do you understand the difference between a direct quote and an indirect quote? A direct quote is enclosed in quote marks. That is something that can be attributed word for word to the speaker. With an indirect quote the author, in this case Mindy, summarizes something that they feel Parnia has said. 

https://www.livescience.com/60593-flatli...ation.html

Even if Parnia did say that, can you see that he would be wrong given the studies I referenced? Showing pupillary response during CPR isn't like trying to find the Higgs Boson. It would seem to be pretty cut and dried.

I don't need Parnia to declare something as fact before I can draw a conclusion from some fairly straightforward published scientific studies.

"I don't need Parnia to declare something as fact before I can draw a conclusion from some fairly straightforward published scientific studies."

The conclusion being that some changes in pupil width occur when some blood is forced back into the brain with CPR ? Just because there might have been some changes in the reflex (in those studies) doesn't mean that the reflexes have been restored.

And even if they are restored, it doesn't mean that the patient automatically regains consciousness.
(This post was last modified: 2017-10-10, 05:20 PM by tim.)

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