please tell me why the blood banks last only for 21-42 days. why it become useless.?
371829
your blood is being replaced all the time, your red cells have a shelf life of 120 days then it is broken down and then replaced in the body. in a blood bag there is no rejeneration process and therefore the cells just die, becuase a donation is taken from the circulation where all the cells are even distributed then a portion of the red cells are 120 days old, and away to die, etc. the shelf life is a time when the proportion of fresh cells outbalances the dead cells, includes a change in pH.
248164
As chslaw said, the laws on the subject vary between states, and you didn't say what state you want to know this about.\n\nIn California, there's no "time limit" per se.  There is a rebuttable presumption that deals with a three hour time limit, but there's no actual law that says blood must be drawn within a certain amount of time.
1038931
generally it should only take a few days.  The blood just needs to get re-absorbed.  Don't go back to that place,\n\nThere really aren't any remedies.  It's just blood that's not in the veins anymore and has to get re-absorbed into the body.\n\nIf it's painful (it shoudn't be) just put some ice on it for about 10-15 minutes.
671506
Yes, I've had this happen once (I've donated over 5 gallons of blood in my lifetime).  It was pretty painful, but I finally found out that it was because I was very cold.  My veins had retreated further into my body, trying to keep warm.  \n\nThe nurse should stop after a few pokes, because they can give you big bruises or worse if they don't.  In general, I prefer giving blood vs. having blood taken for tests, becuase the nurses at the blood bank seem to be gentler.
730231
The blood treats the problem..eg anaemia is lack of quality red bloods cells-> -> blood given, now patient has good quality blood cells, for a short while anyway...;
220937
Forgive me for pointing this out, but survival is possible.\n\nOhter things can be used to maintain circulating volume: crystalloids (like saline) and albumin are the main ones.  Certainly, if you don't get transfused when you need it, you will have some real trouble with anemia, and with oxygen transport--but certain religioius groups, notably the Jehovah's Witnesses, refuse blood transfusions, no matter what.  They often endure more prolonged recovery because of that choice, and certainly many of them die when they would probably have survived with the transfusion, but the transfusion refusal is not a guarantee of death, even in extremely grim situations.\n\nIn longer term situations, the recovery can be accelerated by using erythropoetin or an erythropoetin analog to accelerate production of red cells; this is slower than transfusion, but it has rescued a lot of people who refused transfusions.
1051040
why don't you ask your teacher? I find it very disturbing that the person that drew my blood the other day may have been taught how to do it by someone on yahoo. Gee whats next a Dr. asking the best way to perform a heart transplant.
321192
It depends upon what type of blood YOU have, and the Rh factors (+ or -) or you and yoru parents.\n\nBesides, there are very few places that gurantee that you will get the blood someone donates for you, if any.  If you donate your own, maybe.  But you don't know what type of diseases your parents or friends might have, so they will not gurantee that you'll get their blood.  Takes awhile to process it, anyway.
275748
It (thc) will stay in your bloodstream for about 30 days. It is not unsafe to donate blood
783401
It may be something to do with mad cow disease or HIV, also I think its only if you have received blood between 1980-86 that you can't give blood.
570507
LOL WOW not very long, once you start loosing all the blood ull pass out go into shock, and your done, expired
507843
Absolutely not!  HIV dies upon contact with air in 30 seconds.  Now, hepatitis is a different story...it can live up to 2 weeks in dried blood!!!  Spooky.
1129247
What, now I thought that you were an immortal being, the immortal can not get anything.\nbut your average blood drinker should definately make them get a blood test.
656896
To transfuse, or not to transfuse ... This is a Very Personal decision! ...\nAlthough I Don't mind others knowing what mine is on this matter, for now I  would rather share the Reasons for it being what it is ...\n\nSo here are links to the Reasons behind my decision:\n(Links to other subheadings are found on each Web page in the group.)\n\nThe detailed information in the brochure:\n\nHow Can Blood Save Your Life? \nBlood - Vital For Life \nBlood Transfusions - How Safe? \nQuality Alternatives to Transfusion \nYou Have the Right to Choose \nThe Blood That Really Saves Lives \nJehovah's WItnesses - The Surgical/Ethical Challenge - Appendix #1-\nFrom: Journal of the Americn Medical Association.\nBlood: Whose Choice and Whose Conscience?  - Appendix #2 -\nFrom: New York State Journal of Medicine.\nhttp://www.watchtower.org/library/hb/index.htm\n(Use the links on the Left of the Web page to access the rest of the brochure.)\n\nOne of the points that has Really stuck in my mind from that brochure, (I think it was this one) is that stored blood CAN'T TRANSPORT OXYGEN until MANY HOURs AFTER TRANSFUSION!  ...  (Isn't Transport of Oxygen' one of the Main reasons they Claim a transfusion is Necessary? ... So, in such a case, isn't the transfused blood Only functioning as a volume expander?) ...  So, you might say that a transfusion actually 'Dilutes' one's blood (blood (where oxygen is concerned)  making it Less Capable to do that job ...  Also, that applies to All stored-blood, even Autologous (one's own blood, stored before an operation)!  ...  Even if we were to disregard all the infections, and the mislabelling-mishandling of the blood that often happens, can You see good reason to risk a transfusion, when so many, Much-Safer alternatives exist -- some which Carry Oxygen IMMEDIATELY?\n\nRead on for more info:\n\n"Nonblood Treatment — What Experts Say"\nhttp://www.watchtower.org/library/g/1999/3/8/article_01.htm\n\nBloodless Medicine and Surgery - The Growing Demand : \nPioneers in Medicine \nBlood Transfusions \nThe Growing Demand \nSome of the Methods \nThe New "Standard Care"?\nhttp://www.watchtower.org/library/g/2000/1/8/article_01.htm\n(Use the links on the left of this Web site to access all of these listings.)\n\nJehovah's Witnesses Instrumental in Heart Surgery Advance\nhttp://www.watchtower.org/library/g/1996/1/22/instrumental_in_advance.htm\n\n ... Because Jehovah's Witnesses refuse blood, many Dr.s have been compelled to become Much More Skilled in surgery, to avoid uneccesary bleeding.  They've Developed New Techniques & Alternative Therapies, in very large part, because Jehovah's Witnesses created a Need & a Market for it. ...This began Way before the AIDs & other threats!\n\nHere's another eye-opener for the less-informed on this subject ...\n\nOutstanding Conference on Bloodless Surgery in Moscow\nhttp://www.watchtower.org/library/g/1999/4/22a/article_01.htm\n\nYou might also like to view the VIDEOs on this subject, featuring specialists:\n\nTransfusion - Alternative Strategies - Simple, Safe, Effective\nhttp://www.watchtower.org/library/vcae/article_01.htm\n\nTransfusion-Alternative Health Care—Meeting Patient Needs and Rights\nhttp://www.watchtower.org/library/vcnr/article_01.htm\n\nNo Blood-Medicine Meets the Challenge \nhttp://www.watchtower.org/library/vcnb/article_01.htm\n\nAfter learning just how Dangerous blood transfusion is, and that it Always causes  recuperation to take Much Longer than if it had been avoided (and many of the reasons why), you might be very happy to learn that Many of Jehovah's Witnesses are trained to Share this information with our doctors, from which Everyone reaps the benefits of likely having More Cooperation and better health care from their physicians, when they choose alternatives to blood transfusion ... see:\n\n\nJehovah's Witnesses and the Medical Profession Cooperate\nhttp://www.watchtowe
1169824
I am not for sure.  I know a person with M.S. can't....tell him to call a blood bank and ask them; they'd know.
1026274
I can only speak from my own experience.  The disease my son had required that he get transfusions as often as every day.  The blood he received was not on the list of charges we received (even though he was covered by insurance, the hospital he was at was not a part of our insurance and we got an itemized list of all charges).  Now, perhaps people ARE charged for the actual blood they receive, but there is a law that requires all people are given medical care regardless of their ability to pay.  They won't be left to suffer or die.  When my husband did not have insurance, he was still given excellent care, he just ended up with a large bill at the end of it all.\n\nAnother disclaimer...the blood he received was not from Red Cross, it was from a "local" blood bank.
550119
Donated blood only lasts 28-42 days. Platelets, which contain clotting agents, last only 5 days.