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bleeding

Bleeding, also known as a hemorrhage, haemorrhage, or simply blood loss, is blood escaping from the circulatory system from damaged blood vessels. Bleeding can occur internally, or externally either through a natural opening such as the mouth, nose, ear, urethra, vagina or anus, or through a wound in the skin.
Hypovolemia is a massive decrease in blood volume, and death by excessive loss of blood is referred to as exsanguination. Typically, a healthy person can endure a loss of 10–15% of the total blood volume without serious medical difficulties (by comparison, blood donation typically takes 8–10% of the donor's blood volume). The stopping or controlling of bleeding is called hemostasis and is an important part of both first aid and surgery.
The use of cyanoacrylate glue to prevent bleeding and seal battle wounds was designed and first used in the Vietnam War. Today many medical treatments use a medical version of "super glue" instead of using traditional stitches used for small wounds that need to be closed at the skin level.

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  1. S

    Radiator problem again

    Hi Everyone posted this article the other day: I recently had 2 new radiators installed in my house, one in the bedroom & one in the en-suite on the 2nd floor both with trv's (think thats what they are called) radiator in the en-suite works fine but the one in the bedroom begins to warm up...
  2. S

    Bleed radiators on system with Gledhill Boilermate A class

    Hi, Total newbie here, but here's my situation: Moved into this house at end of May and had to change 2 radiators to fit furniture layouts. These 2 new radiators were fitted, but I didn't bleed them at them time, mainly because I wasn't sure how to top up the system pressure when the bleeding...
  3. S

    Radiator not working properly

    Hi Everyone I recently had 2 new radiators installed in my house, one in the bedroom & one in the en-suite on the 2nd floor both with trv's (think thats what they are called) radiator in the bathroom works fine but the one in the bedroom begins to warm up then stops. Just wondering what might...
  4. H

    central heating always needs bleeding

    every two weeks my central heating system needs bleeding. i,ve checked all round there is no visable leeks unless in the concrete floor can anyone suggest what to do next
  5. B

    Cold Radiator

    We recently had the flat replastered and the plasterer took radiators off the walls. He has replaced them but only 2 out of the three work. The one furthest from the boiler is stone cold - including the pipes. I have tried to contact him to see what he did when reinstalling but to no avail...
  6. N

    Heating Problem

    I was helping a friend drain down his central heating system in the house he had just moved in. I found that some of the rads bleeding valve had been over tighten to the point they had been rounded off, I bled the rads the best I could then refilled and again beld the rads best I could.When full...
  7. R

    problems with wood stove CH 2

    Sorry about all this as i'm new to it all so hopefully this will work this time here is a diagram and my original post was (Hi can any one help me i have a CH wood stove and the way the plummier has plumed it up is defiantly wrong be cos when you switch the pump on it circulates a round the...
  8. N

    Part cold rad...no bleed valve!!!

    Hi I have got a part cold radiator upstairs that does not have a bleed valve. I have tried bleeding the other rads but only water comes out. can I fit a drain cock to this rad to try and expel the air that way or is it better to buy a new rad with a bleed valve. it is the only rad in the house...
  9. M

    New plumbing probs

    We have just had some building work done inc a ensuite to our bedroom, the plumbing however i have no faith in whatsoever, In a earlier thread i put about how they had cut the sink waste into the stench pipe etc on a 8 ft plus run instead of out the wall, then after that i discovered they had...
  10. M

    Expansion tank in un-vented system...

    I have an unvented hot water/central heating system in my home. I recently went round and bled all the radiators, because of this the pressure in the expansion tank dropped to 0. I connected the filling line and filled it back up so it was at 1.5 bar. Is it ok to do this? What should the...
  11. K

    Boiler issue

    Hi Guys, I have a boiler problem and I was wondering if someone here could give me some insight. We ran rather low on oil yesterday for the boiler, found out cause it went to lock out. We had some oil delivered and I let the system settle for a couple of hours before firing it up again. It...
  12. A

    Central Heating Protector F1

    Hi all, I have a can of Fernox F1 to be applied to the system via a radiator - do you close both valves and then let some water out thro the bleed valve - and then inject the contents of the can? How much water do I need to let out of radiator first? cheers, dave
  13. L

    Flashing light on Potterton

    The Pump Fault/Low Pressure light on my Potterton Performa System HE has been flashing intermittently for nearly 2 months now. I have so far taken 5 days of my annual holiday entitlement waiting for plumbers to fix it - First 2 didn't turn up, 3rd admitted he didn't know what was wrong, 4th...
  14. S

    Servowarm elite 21 boiler

    HI all can anyone plese help i have a servo warm elite boiler i have had to change the water cylinder and have had to alter the pipe work around the pump and the 3 way valve . I have filled the system and the central heating side is working fine, however when i put just hot water when it starts...
  15. O

    Air in system

    Hi Guys, got a bad airlock problem, a few weeks back my indirect cylinder started leaking, so being a bit handy I thought I’d have a go at replacing it, all went well til it came to turning the boiler on and bleeding the system. The central heating part of the circuit is fine but as soon as you...
  16. K

    feed & expansion locations with low head

    hi all, I'm currently following up some suggestions about stopping air getting into my vented system in another thread. Hopefully these will solve things, however, I wanted to check what I 'think' I know about the feed and vent positions and their effect on suction is correct, and more...
  17. W

    Rad Valve Question

    So my mum had a rad valve body from a TRV, with no TRV cap. The store told her she'd need to know the make of the TRV before getting a replacement cap, which she did not know as it's not written on the body. Next time I come round she'd improvised by taking the cap off a normal rad valve...
  18. A

    Combi-boiler: Pressure loss

    Hello all I hope someone can help as we have been having a total nightmare with our boiler :( Our boiler has been losing pressure now for the last few months, we have had several British Gas engineers round who have tried, putting sealent in the system (3 times), bled the radiators, checked...
  19. B

    Bleeding a drained combi system...

    Im going to be draining a combi system to change a couple of rads and pipework.When i bleed the system do i need to release air from boiler in anyway which is situated downstairs in kitchen ,or will bleeding all the rads be okay..??
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