Diseases & conditions A-Z List
Diseases & Conditions A-Z List - «S»:
Stable angina is chest pain or discomfort that typically occurs with activity or stress. Angina is a type of chest discomfort caused by poor blood flow through the blood vessels (coronary vessels) of the heart muscle (myocardium).
See also: Unstable angina
Your heart muscle is working all t...
Standard ophthalmic exam
A standard ophthalmic exam is a series of tests done to check your vision and the health of your eyes.
See also: Refraction test
How the Test is Performed
The eye doctor will ask questions about your overall health and family's medical history. You should tell the doctor if you have noticed any ey...
Staph aureus food poisoning
Staph aureus food poisoning is an illness that results from eating food contaminated with a toxin produced by the Staphylococcus aureus bacteria.
Staphylococcus aureus food poisoning is often caused when a food handler contaminates food products that are served or stored at room- or refrig...
Stasis dermatitis and ulcers
Stasis dermatitis is a skin condition due to the buildup of fluid (swelling) under the skin.
The extra fluid that builds up in the body makes it hard for the blood to feed cells and get rid of waste products. The tissue becomes poorly nourished and fragile, resulting in stasis dermatitis. Th...
Stay away from asthma triggers
It is important to know what things make your asthma worse. These are called asthma "triggers." Avoiding them is your first step toward feeling better.
Our homes can be filled with asthma triggers. Some of these are in the air we breathe, some are in our furniture and carpets, and some are on our pe...
Stem cell research
A stem cell is a "generic" cell that can make exact copies of itself indefinitely. In addition, a stem cell has the ability to produce specialized cells for various tissues in the body -- such as heart muscle, brain tissue, and liver tissue. Scientists are able to maintain stem cells forever, develo...
A stent is a tiny tube placed into an artery, blood vessel, or other duct (such as one that carries urine) to hold the structure open.
When a stent is placed into the body, the procedure is called stenting. There are different kinds of stents. Most are made of a metal or plastic mesh-li...
Stereotactic radiosurgery is a form of radiation therapy that focuses high-powered x-rays on a small area of the body.
With regular radiation therapy treatment, the healthy tissue nearby also receives radiation.
Stereotactic radiosurgery better focuses the radiation on the abnormal area.
Stereotactic radiosurgery - discharge
You received stereotactic radiosurgery or radiotherapy, a form of radiation therapy that focuses high-powered x-rays onto a small area.
You may have a headache or feel dizzy after your treatment.
If you had pins that held a frame in place, they will be removed before you go home.
Sterile means "free from germs." When you care for your catheter or surgery wound, you will need to take steps to avoid spreading germs. Some cleaning and care procedures need to be done in a sterile way so that you do not get an infection. Carefully follow all of the steps described below to keep y...
Sterilization surgery - making a decision
Sterilization surgery in women is called tubal ligation.
In men, it is called a vasectomy.
Many people in a long-term, monogamous relationship who have already had several children choose to have such procedures. However, some regret their decision later. The younger the man or woman, the more likel...
A stillbirth is when a fetus that was expected to survive dies during birth or during the last half of pregnancy.
See also: Miscarriage
Stillbirth is becoming less common as care for pregnancy improves. If you have a stillbirth, your medical provider may request to carefully examine an...
Stimulants are medications that increase heart rate, breathing rate, and brain function. Some stimulants affect only a specific organ, such as the heart, lungs, brain, or nervous system.
Some medications are given for their stimulant effect. For example, epinephrine during cardiac arrest. Other time...
A stingray is a sea animal with a whip-like tail. The tail contains sharp spines that contain venom. This article describes the effects of a stingray sting.
This is for information only and not for use in the treatment or management of an actual poison exposure. If you have an exposure, you should c...
Stomach acid test
The stomach acid test is used to measure the quantity and acidity of stomach contents.
How the Test is Performed
After not eating for a period of time, fluid is all that remains in the stomach. This fluid can be removed via a tube inserted through the esophagus (food pipe).
To test the ability of c...