Veins

It all depends on the amount of air. Medical personnel take pains to avoid introducing any air into an IV line at any time. Most of the time, a tiny amount of air presents no problem - but that's most of the time.

The two major factors at play are emboli and clotting. Emboli (plural of embolus) are "plugs" or blockages that are actually air bubbles, which jam a blood vessel and prevent blood from passing through it unimpeded. Lack of blood through a vessel means lack of oxygen, and the tissue itself can die. If the tissue is skin tissue over a small area (as would happen with emboli blocking capillaries at the skin), you'll eventually slough off the involved dead tissue and no harm done. On the other side of the equation, blocking blood flow in the brain can be lethal or highly damaging.

The other problem is clotting. When your blood is exposed to air, it starts to clot. On the surface of your skin, this is a good thing - it stops bleeding and forms a sort of bandage. However, inside your circulatory system this too can be problematic, and even lethal.

While there's no way of telling for certain what the effects of a given injection will be, the more air injected, the greater the danger. Tiny bubbles in an IV line or hypodermic are to be avoided, but rarely will have an effect on the patient. Large injections (the prior writer mentioned 50 cc) are potentially lethal.

The coronary sinus is a collection of veins joined together that collect blood from the myocardium. The coronary sinus empties into the right atrium.

I will answer more of your questions! :D ~Best_Cousins

Oxygenated blood from the lungs to the heart. This is unusual as almost all veins carry deoxygenated blood.

If there is no pain or other related symptom, most likely it is just the way your anatomy developed. Some people have veins located very deeply in their tissue and other people have them very close to the surface. It is just a normal variation in people and is often an inherited trait.

Another reason for veins to look deeper may be related to your body type, those with more muscle and less adipose tissue also will have their veins much more prominently exposed.

One other cause can be dehydration making a low blood volume, but if you get proper fluids, that is unlikely the cause for your veins to be "sunken". You would likely have additional symptoms if that were the cause, as well. Just be sure to keep well hydrated.

If you are concerned, ask your doctor for the specific reason why your veins may look different than other people's the next time you have a check up.

Not a doctor....but, calm down, that way the heart slows down and pumps less blood. Hold the hand up high, so that less blood gets to it, and keep the person as cool as possible. Press ice in the area to slow down the bleeding. Tightly wrap the area. Keep the hand elevated. Don't fall asleep. Get assistance.

The only two medical specialists who receive formal (ACGME accredited fellowship) training in venous disease and treatment are Interventional Radiologists and Vascular Surgeons. Phlebology (treatment of venous disease), though a recently recognized medical specialty, does not have a formal ACGME accredited residency or fellowship pathway.

Another name for vein is blood vessel.

The liver gets a dual blood supply from the hepatic portal vein and hepatic artery. Supplying approximately 75% of the liver's blood supply, the hepatic portal vein carries venous blood drained from the spleen, gastrointestinal tract, and its associated organs. The hepatic arteries supply arterial blood to the liver, accounting for the remainder of its blood flow . Oxygen is provided from both sources; approximately half of the liver's oxygen demand is met by the hepatic portal vein, and half is met by the hepatic arteries.

In human anatomy, the hepatic veins are the veinsthat drain de-oxygenated blood from the liverinto the inferior vena cava.

The renal vein (renal = Kidney in Latin).

The great cardiac vein is one of the largest veins in the body. It is located in the heart, leading away from the coronary sinus. It's function is to lead blood that has had the oxygen removed from it away from the heart.

They bring de-oxygenated blood from other parts of the body to the heart, where it is pumped to the lungs to be oxygenated and sent out again through the aorta of the heart to the arteries.

There are one-way valves (leaflet valves) in the veins which normally allow blood to flow only back to the heart.

Muscle pressure is the main force pushing blood back from the extremities, especially against gravity in the legs. When the valves malfunction or are affected by high blood pressure, the vessels can form varicose (swollen) veins, blue veins, or spider veins.

The rupture of a vein is called phleborrhexis. It is often followed by a lot of bleeding. If it happens in the brain, it will cause a stroke. If an anticlotting medication is given right away, the stroke can be prevented.

The pulmonary vein is the only vein that carries oxygenated blood. Arteries are the major oxygenated blood carriers (away from the heart) veins carry blood back to the heart. The pulmonary vein returns blood from the lungs to be distributed by the heart and arteries.

They carry deoxygenated blood

their walls are thin

their lumen is larger than arteries

elasticity is less than artery

bluish in color

blood flows in vein is with low pressure

their valves maintain unidirectional flow of blood

the main function of a renal vein is to carry urine to the kidneys

Okay well what veins of the body do is they carry blood towards the heart. basically they are blood vessels. the difference between veins and arteries is that arteries Carrie oxygenated blood and veins carry deoxygenated blood that it also why veins are greenish- blue

The inferior vena cava is one of two veins which carries deoxygenated blood from the body into the right atrium of the heart, the other vein is the superior vena cava: inferior deals with blood coming from body areas below the heart, superior deals with blood coming from above the heart.

The arteries carry de oxygenated blood out of the heart into the lungs and the veins bring oxygenated blood into the heart, ready for circulation of the body.
The difference is that arteries carry blood away from the heart and veins carry blood towards the heart.

The vena cava are two sets of veins: the superior vena cava, and the inferior vena cava. The inferior vena cava is the longest vein in the body.

The superior vena cava mainly (by volume) brings deoxygenated blood from regions of the body above/at the level of the heart & the arms. The azygous vein anastomoses with the superior vena cava, and thus the superior vena cava receives blood from both sides of the posterior wall of the thorax, via the azygous vein and hemiazygous vein.

In some individuals anastomoses may occur between the azygous & hemiazyous vein with the right & left renal veins, respectively, and/or the inferor vena cava. Therefore blood returning to the heart via the abdomen or kidneys may also pass through the superior vana cava to the heart. The inferor vena cava returns blood, mainly from the level below the diaphragm down to the feet, to the heart.

Yes, both the superior and inferior vena cava carry deoxygenated (oxygen-poor) blood and deposit it into the right atrium of the heart.

Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. The blood in the veins is not entirely without oxygen but is depleted to a large extent.

Arteries ALWAYS carry blood AWAY from the heart and veins to the heart.