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spirometry

A painless, non-invasive lung function test using an instrument called a spirometer to measure the volume of air that can be exhaled from the lungs in a certain time, such as one second

spleen

An organ situated on the left side of the abdomen that filters out worn-out red blood cells and other foreign bodies from the bloodstream.

splenectomy

The surgical removal of the spleen, an organ on the left side of the abdomen that filters out worn-out red blood cells and other foreign bodies from the bloodstream.

splenomegaly

An enlarged spleen.

spondarthritides

A group of arthritic conditions.

spondoarthritides

A group of disorders of the back that share certain clinical features.

spondylolisthesis

A condition in which a bone in the lower part of the spine slips out of position and onto the bone below.

spondylosis

A common degenerative joint disease that is due to wear and tear on the bones of the neck and back.

sputum

A substance coughed up from the respiratory tract.

squamous

Relating to cells that make up epithelium, the outer layer of cells that covers the open surfaces of the body.

SSRI

An abbreviation for selective seratonin re-uptake inhibitors, a relatively new class of drug used to treat depression

stapedial reflex

A very small muscle in the middle ear that contracts in response to loud sound.

staphylococcal infection

A variety of infections caused by the staphylococcal bacteria.

statin

One of a class of drugs that inhibit cholesterol formation in the liver.

statins

A class of drugs that inhibit cholesterol formation in the liver.

STD

sexually transmitted disease

stem cells

Cells with the ability to specialise into various forms.

stenosis

Narrowing of a tubular structure or valve.

stent

A tube placed inside a tubular structure in the body, to keep it patent, that is, open.

sternotomy

Surgical opening of the breastbone.

steroids

Compounds with a common basic structure, which occur naturally in the body. The term may also refer to man-made drugs administered because they act like hormones.

Stevens-Johnson syndrome

A dangerous allergic reaction characterised by severe blisters and bleeding in the muscous membranes of the mouth, eyes, nose and genitals.

Stokes-Adams attacks

Recurrent episodes of temporary loss of consciousness caused by insufficient bllood flow from the heart to the brain

stomach

the organ or the body where food is stored and broken down