0
In kidney dialysis the blood is drawn from a vein or an artery?
Wiki User
∙ 11y ago
a vein
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
Why arterial blood gas is taken from artery?
There is no such thing as arterial blood gas. When they draw blood it is drawn into a vial that has a vacuum, so it may appear that they are drawing gas, but no such gas exists. Also, when they draw blood they draw it from a vein.
Why are arteries usually drawn as red in diagrams while veins are drawn as blue?
To symbolize that arteries carry blood that's rich in oxygen while veins carry blood that's low on oxygen.
Why is blood drawn from veins rather than arteries?
doctors typically draw blood from veins because veins are more superficial (ie close to the surface of the skin) and therefore more easily accessible. additionally, arteries are under high pressure and there is a risk of major bleeding. lastly, you have less collateral circulation with arteries than veins. what that means is this (let's use your arm as an example): there are many different veins in your forearm that lets blood get from your hand back to your heart, so damaging any one of these veins isn't a big deal. however, there are only two arteries in your forearm that supplies blood to your hand (the radial and ulnar arteries). Arterial blood is sampled from the radial artery because it's bigger and more easily accessible. However, damaging this artery can be catastrophic if the ulnar artery is not well developed, because then your hand is not getting enough blood, and it can become gangrenous and die (this is a vascular emergency). That is why doctors will do an Allen's test (look it up on google... you can even try it on yourself) before doing an arterial stick to make sure you have good blood flow through your ulnar artery that can sustain your hand in case the radial artery is destroyed with the arterial stick. so for these reasons, doctors don't do an arterial blood draw unless they really need one, and the one test that comes to mind where you absolutely need arterial blood is the arterial blood gas test. this test is used when doctors need to know the oxygen saturation and pH of the arterial blood, typically in patients with respiratory failure and sometimes in type 1 diabetics with diabetic ketoacidosis (DKA).
How do you make a real transmutation circle?
Transmutation circles can be made by drawing them. The most "powerful" are considered to be drawn out of blood; that is, if you belive in alchemy. Now, how to use a transmutation clircle is a different question entirely....
How are isohytes drawn on the map?
Isohytes are lines drawn on maps joining places of equal rainfall.
Where is the roller pump in the kidney dialysis machine?
It is located at where the patient's blood is drawn in.
What is the proper name for a artificial kidney machine?
An artificial kidney - is a dialysis machine. A patient is 'hooked up' to the machine via an intravenous needle - and their blood is drawn through a series of filters and cleansers, before being returned to the patient's body. The process takes from 3 to 5 hours, and is carried out three times a week..
Are blood gases usually drawn from a vein in the arm?
No Blood gases are measured to determine the oxygen concentration in the arterial blood. Therefore the blood must be drawn from an artery.
Are blood gases usually drawn from veins in the arm?
No Blood gases are measured to determine the oxygen concentration in the arterial blood. Therefore the blood must be drawn from an artery.
Why arterial blood is taken during dialysis?
We say we are drawing from the "art" port, but often, it is not arterial blood that is drawn. Unless the person has a dialysis access in their arm, the blood drawn from ports on their chest is actually venous blood. However, for the sake of ease, we label and color the machine lines with red and blue and refer to the lines as the arterial line and the venous line.
What is the name of the blood vessel which takes blood from the body?
Typically, it is drawn from the antecubital vein, in the arm. It can be drawn from other veins, as well, including dorsal veins in the hands and feet, and from ports inserted into larger veins, for instance.
Low Blood Pressure and Hemodialysis?
Hemodialysis is one of the most widely used kidney replacement therapies for people that suffer from kidney failure. It is estimated that there are over a quarter of a million people on hemodialysis in this country. One of the most common complications from hemodialysis is low blood pressure. Having low blood pressure can make a person dizzy, fatigued, and nauseous after a dialysis treatment, greatly diminishing their quality of life. Up to 50% of all patients on hemodialysis suffer from low blood pressure as a direct result of the dialysis process. Medication and treatment for low blood pressure after a hemodialysis session may or may not help to alleviate the symptoms. Although hypotension may be a symptom of a serious medical condition like a heart attack, shock, sepsis, or loss of blood volume, it is more often the result of other contributing factors that interfere with the dialysis treatment. For example, a person that eats before a dialysis session is at a greater risk for suffering symptoms of hypotension. When a person eats food, the body rushes blood to the digestive organs. As the dialysis session commences, the dialysis machine draws out blood to be filtered, lowering blood pressure and reducing flow to certain organs and areas of the body. This can contribute to low blood pressure. Most dialysis patients are advised to refrain from eating before dialyzing for this reason. Another source of low blood pressure in hemodialysis patients is a reaction to the membrane used in the dialysis treatment. Approximately 5% of patients that suffer from low blood pressure can attribute their symptoms to a bad reaction to the membrane. In order to solve this problem, nephrologists and dialysis nurses can change the kind of membrane used during treatment. During the dialysis treatment, the nephrologist can decide how much fluid to remove from the patient during one session. If too much fluid is drawn out or if it is removed too quickly, low blood pressure can result. For this reason, it's important that physicians estimate a patient's dry weight accurately and regularly. Unfortunately, estimating dry weight still involves a lot of guess work, which makes it difficult. Finally, it is important for nephrologists to prescribe the correct level of sodium concentration in the dialysis fluid. Having a higher concentration of sodium in the fluid can lessen the chances that the patient will develop symptoms of low blood pressure.
Why arterial blood gas is taken from artery?
There is no such thing as arterial blood gas. When they draw blood it is drawn into a vial that has a vacuum, so it may appear that they are drawing gas, but no such gas exists. Also, when they draw blood they draw it from a vein.
Is dark red blood a sign of a condition?
It depends on where it has been drawn. Deoxygenated blood (blood from the pulmonary artery and all veins except the pulmonary vein) is dark red in colour. Oxygenated blood is a brighter red. If the blood is dark red where it shouldn't be, then it could be a haemoglobic condition; otherwise, it is completely normal.
What region of the body is blood normally drawn from?
Blood is normally drawn from the anticubital region of your body.
How long do you fast before having blood drawn?
It rather depends on why blood is being drawn?
Dialysis?
DefinitionDialysis is a method of removing toxic substances (impurities or wastes) from the blood when the kidneys are unable to remove these substances.Alternative NamesArtificial kidneys; Hemodialysis; Peritoneal dialysis; Renal replacement therapyDescriptionWHAT IS HEMODIALYSIS?Hemodialysis works by removing blood from the body and circulating it through special filters outside the body. The blood flows across a filter, along with solutions that help remove toxins. The blood is then returned to the body.Hemodialysis uses special ways of accessing the blood in the blood vessels. The access can be short-term (temporary) or long-term (permanent).Temporary access involves placing dialysis catheters (hollow tubes) into larger veins, usually in your neck, chest, or leg near the groin. They are most often used in emergency situations for short periods of time. However, catheters called tunneled catheters can be used for weeks or even months.Permanent access is created by surgically joining an artery to a vein, usually in the arm. This vein becomes thickened over time. To perform the dialysis, blood is removed and returned through the vein. There are two methods to create this access:An artery and a vein are directly connected to each other. Then, over a period of months, these blood vessels form a connection called a fistula (an arteriovenous fistula, or AVF).A man-made bridge (arteriovenous graft, or AVG) can also be used to connect the artery and vein. An AVG can be used for dialysis within several weeks.An AVF has a lower chance for infections than an AVG and usually lasts longer before it needs to be replaced.During a hemodialysis session, one or two needles must be inserted into the fistula or graft.It is important to stick to the diet and medicines the dialysis staff and your kidney specialist (nephrologist) prescribed.WHERE TO HAVE DIALYSISMost often, hemodialysis takes place in a special dialysis center. Patients usually have three treatments per week, during which they must sit in a chair for 3 - 4 hours. Many people feel tired for several hours after the dialysis.Most dialysis centers have a very busy schedule. Patients who are late may not be able to make up the time.Because the body continues to make waste products and take on extra fluid between dialysis sessions, you must closely follow a kidney dialysis diet.Some people can do hemodialysis at home, avoiding having to travel back and forth to a dialysis center. Home dialysis is usually done using one of two schedules:Shorter (2 - 3 hours) treatments done at least 5 - 7 days per weekLonger nightly treatments done 3 - 6 nights per week while you are sleepingHome hemodialysis treatments help keep blood pressure lower. Many patients no longer need blood pressure medicines. The longer nightly treatments do a better job of removing waste products. They are done more slowly and are therefore easier on the heart and access site (AVF or AGF).A dialysis nurse can train patients to do home dialysis. Patients do not have to buy a machine. Supplies can be delivered. Both the patient and any caregivers must learn to:Handle the equipmentPlace the needle into the access siteMonitor the machine and blood pressure during treatmentKeep recordsClean the machineOrder suppliesTAKING CARE OF YOUR GRAFT OR FISTULAAvoid all pressure on the access site. If the graft or fistula clots, you may need a new one.Do not allow anyone to take a blood pressure reading on the same arm with the access.Do not wear tight clothing around the access site or on the arm.Avoid placing pressure on the arm with the access while you sleep.Avoid placing pressure on the arm when you are lifting heavy items.Do not allow any blood to be drawn from the arm.Do not use creams or lotions over the access site.Learn how to feel the access site for the "thrill." This indicates that the AV site is still functioning. If the thrill disappears, call your health care provider immediately.Do not miss or skip any dialysis sessions.Observe the access site after dialysis, watching for swelling, infection, or bleeding. Call your health care provider immediately if you have a feveror other sign of infection.IndicationsThe kidneys function as filters for the blood, removing waste products. They also help:Manage how much water is in the bodyMaintain the balance of sodium, potassium, phosphorous, and other minerals and vitamins in the bodyEnsure that the blood pH remains between 7.35 and 7.45Dialysis replaces some of the functions when the kidneys are no longer working. A buildup of waste products and other imbalances would lead to death if dialysis did not perform these functions.Dialysis is started after a gradual loss of kidney function in patients with chronic kidney disease. Your doctor and nurse will begin discussing dialysis with you before you need it.Dialysis also may be used when the kidneys suddenly stop working (also called acute renal failure). On occasion, dialysis can be used to quickly remove drugs or poisons from the body.RisksThe immediate risks include:A small bubble of air in the blood that travels to a blood vessel in another part of the body (air embolism)Bleeding from the access siteCrampsDialyzer reactionElectrolyteimbalanceInfectionIrregular heartbeat or ischemiaLow blood pressure (hypotension)Nausea and vomitingConvalescenceSee: End-stage kidney diseaseReferencesTolkoff-Rubin N. Treatment of irreversible renal failure. In: Goldman L, Ausiello D, eds. Cecil Textbook of Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier;2007:chap 133.Mitch WE. Chronic kidney disease. In: Goldman L, Ausiello D, eds. Cecil Textbook of Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier;2007:chap 131.Home Hemodialysis. National Kidney and Urologic Diseases Information Clearinghouse (NKUDIC). NIH Publication No. 08-6232. February 2008. Accessed September 23, 2009.Vascular Access for Hemodialysis. National Kidney and Urologic Diseases Information Clearinghouse (NKUDIC). NIH Publication No. 08-4554. February 2008. Accessed September 23, 2009.
