What if I see blood in the syringe? If you see blood in the bottom of the syringe hub before you push in the plunger: Remove the needle without giving the medicine. Dispose of the needle in a safe way. Use a hard plastic, metal, or "sharps" container with a lid. Use a new needle to give the shot. You can put a new needle on the syringe and then give the injection in a new spot.
What about infections? These signs include: Increased pain, swelling, warmth, or redness around the injection site. Red streaks leading from the site. Pus draining from the site. A fever. How do I rotate injection sites?
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Learn about a punctured lung, including what to expect during recovery. A pulmonary embolism is a blood clot that occurs in the lungs. It can damage part of the lung and other organs and decrease oxygen levels in the blood. Health Conditions Discover Plan Connect. Air Embolism. This is often referred to as decompression sickness or "the bends".
Surfacing too quickly or holding your breath while you swim to the surface can cause the air in your lungs to expand. This may rupture lung tissue pulmonary barotrauma , which can lead to gas bubbles being released into the arterial circulation arterial gas embolism. In some divers, underlying conditions can increase the chance of decompression sickness.
These should be discussed with a doctor who specialises in diving medicine. If the gas bubble blocks an artery, it can cut off the blood supply to a particular area of the body. The seriousness of the blockage depends on which part of the body is affected, the size of the gas bubble and the amount of inert gases unreactive gases within the diver's tissues. These conditions are very serious and can be fatal, particularly if the air embolism is not treated quickly. After a diver with an air or gas embolism has received emergency medical attention and their condition has stabilised, they'll be transferred to a hyperbaric chamber.
A venous embolism is not as serious as an arterial embolism, which is itself not as serious as a cerebral embolism.
However, all of the above have the potential to cause severe damage to organs and systems if left unchecked. Some medical procedures can cause small amounts of air to enter the venous system; via an intravenous drip, for instance. In general, these are stopped at the lungs and do little or no harm. In rare cases, they can reach the heart and disrupt its workings.
Arterial gas embolisms are much more serious. The embolism might potentially prevent oxygenated blood from reaching the target organ and cause ischemia an inadequate blood supply to an organ ; if the heart is affected it can produce a heart attack. If an arterial gas embolism reaches the brain, it is referred to as a cerebral embolism and can cause a stroke.
An injection of ml of air into the cerebral circulation can be fatal. Just 0. As mentioned, some medical procedures can allow small amounts of air to enter the body; this can be serious, but it happens rarely. The vast majority of air embolism cases involve diving. There are two ways in which an air embolism can form in response to a dive; both occur during the ascent but via two different processes:.
If the diver returns to the surface too swiftly, the nitrogen is not given the chance to be reabsorbed into the blood and will leave the tissue as bubbles of gas. A good analogy to help understand this process involves a bottle of carbonated soda. When the bottle is sealed, the carbon dioxide cannot be seen because it is under pressure.
However, if the pressure is quickly released by opening the cap, the carbon dioxide forms into readily visible bubbles. Other causes of air embolism can be iatrogenic caused by a medical intervention. These can include:.
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