info
Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss
NHS Hydraulic Theory
4 views
Skip to first unread message
Tone
Aug 4, 2022, 10:17:23 AM8/4/22
to
I have a leg the blood circulation of which was damaged by DVT. A blood
clot lodged in my groin, twice, about twenty earth years ago.
My leg now swells badly, and leaks fluid from dark discoloured patches
that are gradually creeping higher.
In their wisdom the NHS zapped out my saphenous vein thinking it might
help. That is in fact an operation for varicose veins, that I don't
have. It made it worse.
A district nurse now wants me to wear compression stockings. I have
tried this before and found them very painful. The leg goes cold, and
they restrict circulation (what there is of it).
I have tried to explain from an aircraft hydraulic engineer's (rtd.)
point of view that a compression stocking would restrict the blood flow
around my leg even more. It would in fact create a long venturi.
Venturis (spelling?) are designed to speed up flow, not increase it. In
fact, upstream they decrease it.
She maintained that by reducing the size of the leg it would help to
pump blood back up out of it.
I think it would reduce the flow of blood into it, and raise blood
pressure. I have practical experience of this.
So who is right?
I know surgeons disagree about compression stockings. The guy who did my
hip replacements declared they were a total waste of time.
Any thoughts from ye shedd?
Do we still have a sheddi GP aboard or has he debunked?
Tone
clot lodged in my groin, twice, about twenty earth years ago.
My leg now swells badly, and leaks fluid from dark discoloured patches
that are gradually creeping higher.
In their wisdom the NHS zapped out my saphenous vein thinking it might
help. That is in fact an operation for varicose veins, that I don't
have. It made it worse.
A district nurse now wants me to wear compression stockings. I have
tried this before and found them very painful. The leg goes cold, and
they restrict circulation (what there is of it).
I have tried to explain from an aircraft hydraulic engineer's (rtd.)
point of view that a compression stocking would restrict the blood flow
around my leg even more. It would in fact create a long venturi.
Venturis (spelling?) are designed to speed up flow, not increase it. In
fact, upstream they decrease it.
She maintained that by reducing the size of the leg it would help to
pump blood back up out of it.
I think it would reduce the flow of blood into it, and raise blood
pressure. I have practical experience of this.
So who is right?
I know surgeons disagree about compression stockings. The guy who did my
hip replacements declared they were a total waste of time.
Any thoughts from ye shedd?
Do we still have a sheddi GP aboard or has he debunked?
Tone
Peter
Aug 4, 2022, 10:57:01 AM8/4/22
to
Tone <to...@email.com> wrote in news:tcgkdi$2r0l1$1...@dont-email.me:
> A district nurse now wants me to wear compression stockings. I have
> tried this before and found them very painful. The leg goes cold, and
> they restrict circulation (what there is of it).
>
> I have tried to explain from an aircraft hydraulic engineer's (rtd.)
> point of view that a compression stocking would restrict the blood flow
> around my leg even more. It would in fact create a long venturi.
> Venturis (spelling?) are designed to speed up flow, not increase it. In
> fact, upstream they decrease it.
>
I am neither an engineer nor a medic. But I wonder, if your hydraulic pipes
furthest from the pump become leaky or flabby you would loose some of the
pressure needed to return the fluid to the pump, so the pump would have to
work harder, yesno? If you then applied a tight sleeve around the flabby or
leaky pipe the loss of pressure would then be at least partially mitigated,
resulting in improved performance, noyes?
I have fond memories of telling my Dad not to be a daft old bugger when he
claimed to know better than the medics. It was the first time I had ever
sworn at him, so he took notice and listened to the people who knew more
about his body than he did. His health, and life, improved accordingly.
--
Peter
-----
> A district nurse now wants me to wear compression stockings. I have
> tried this before and found them very painful. The leg goes cold, and
> they restrict circulation (what there is of it).
>
> I have tried to explain from an aircraft hydraulic engineer's (rtd.)
> point of view that a compression stocking would restrict the blood flow
> around my leg even more. It would in fact create a long venturi.
> Venturis (spelling?) are designed to speed up flow, not increase it. In
> fact, upstream they decrease it.
>
furthest from the pump become leaky or flabby you would loose some of the
pressure needed to return the fluid to the pump, so the pump would have to
work harder, yesno? If you then applied a tight sleeve around the flabby or
leaky pipe the loss of pressure would then be at least partially mitigated,
resulting in improved performance, noyes?
I have fond memories of telling my Dad not to be a daft old bugger when he
claimed to know better than the medics. It was the first time I had ever
sworn at him, so he took notice and listened to the people who knew more
about his body than he did. His health, and life, improved accordingly.
--
Peter
-----
Tone
Aug 4, 2022, 12:13:51 PM8/4/22
to
On 04/08/2022 15:56, Peter wrote:
> I am neither an engineer nor a medic. But I wonder, if your hydraulic pipes
> furthest from the pump become leaky or flabby you would loose some of the
> pressure needed to return the fluid to the pump
They're not that leaky.
> I am neither an engineer nor a medic. But I wonder, if your hydraulic pipes
> furthest from the pump become leaky or flabby you would loose some of the
> pressure needed to return the fluid to the pump
Tone
maus
Aug 4, 2022, 7:09:32 PM8/4/22
to
On 2022-08-04, Tone <to...@email.com> wrote:
> I have a leg the blood circulation of which was damaged by DVT. A blood
> clot lodged in my groin, twice, about twenty earth years ago.
>
> I have a leg the blood circulation of which was damaged by DVT. A blood
> clot lodged in my groin, twice, about twenty earth years ago.
>
> Any thoughts from ye shedd?
>
> Do we still have a sheddi GP aboard or has he debunked?
>
> Tone
>
I have been wearing compression for more than 15 years, The nurse tell
>
> Do we still have a sheddi GP aboard or has he debunked?
>
> Tone
>
me to, I have a firm law, if the nurse tells me to, I do it. Its all
hoodoo anyway.
--
grey...@mail.org
Fi Fi Fo Fum, I smell the stench of an influencer
ten, twenty million tops
Thomas Prufer
Aug 5, 2022, 2:21:34 AM8/5/22
to
On Thu, 4 Aug 2022 15:17:22 +0100, Tone <to...@email.com> wrote:
>She maintained that by reducing the size of the leg it would help to
>pump blood back up out of it.
>
>I think it would reduce the flow of blood into it, and raise blood
>pressure. I have practical experience of this.
No medical experience here, yet: it's hard to argue against experience...
>She maintained that by reducing the size of the leg it would help to
>pump blood back up out of it.
>
>I think it would reduce the flow of blood into it, and raise blood
>pressure. I have practical experience of this.
Further: there's non-compressing but firm stockings that surround the leg
closely. Theory is that the muscles in the leg move and have something firm (but
not elastically compressing) outside the leg to squeeze against. That helps pump
the blood back (and assumes the little one-way valves work), but without the
squeeze from elastic compression. CircAid JuxtaFit and velcro compression wraps
seem to be the terms for these.
May just not work as advertised -- but this may show your willingness to go
along with the suggestions by the district nurse, without you repeating an
experiment that you think won't work.
Second, apparently there's external stockings with pressure pumps that set up a
peristaltic wave moving up the leg. From an engineering standpoint, it looks
like a "could work" idea...
Thomas Prufer
RustyHinge
Aug 5, 2022, 7:50:48 AM8/5/22
to
later had agonyplast^h^h^angioplasty and the occasional stent in the
femoral artery (from groin to ankle), and I now use the stockings I have
remaining by cutting lengths off them to use as broad elastic bands.
--
Rusty Hinge
To err is human. To really foul things up requires a computer and the BOFH.
Brian Gaff
Aug 6, 2022, 4:03:00 AM8/6/22
to
Don't know for sure, but to me, you sound right to me. I gather similar
issues happen in giraffes necks as they get older, only the other way around
so to speak. It was on a wild animal vet program, so it must be true.
YesJust stick your finger over a tap and you can squirt the water a long
way, but you can also feel the pressure behind your finger increase.
You almost need some kind of extra pump in the feet to help suck the blood
through and shove it back up hill. Why else do feet get colder than the
rest of the body, the blood is older one supposes and has less oxygen left
in it.
Brian
--
--:
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...
bri...@blueyonder.co.uk
Blind user, so no pictures please
Note this Signature is meaningless.!
"Tone" <to...@email.com> wrote in message
news:tcgkdi$2r0l1$1...@dont-email.me...
issues happen in giraffes necks as they get older, only the other way around
so to speak. It was on a wild animal vet program, so it must be true.
YesJust stick your finger over a tap and you can squirt the water a long
way, but you can also feel the pressure behind your finger increase.
You almost need some kind of extra pump in the feet to help suck the blood
through and shove it back up hill. Why else do feet get colder than the
rest of the body, the blood is older one supposes and has less oxygen left
in it.
Brian
--
--:
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...
bri...@blueyonder.co.uk
Blind user, so no pictures please
Note this Signature is meaningless.!
"Tone" <to...@email.com> wrote in message
news:tcgkdi$2r0l1$1...@dont-email.me...
0 new messages