Category: N

A study of physiologic activities in sleep, done in a “sleep laboratory.”  

A process used to determine, via one of several different methods, if a man is capable of having an erection.  

Opening in bone through which nerves or blood vessels pass.  

A woman who has never been pregnant. A woman who has never conceived a child.  

Surgical creation of a conduit between the aorta and pulmonary artery to increase blood flow to the aorta.  

Pertaining to red blood cells in which the amount of hemoglobin is normal and therefore have a normal red color. The term used to describe a red blood cell that possesses a standard hemoglobin concentration is “normochromic.”  

Attribute of tissues or cells that have average staining ability.  

Heart rate and electrical conduction originating from the sinoatrial node. The normal heart rhythm whose pacemaker is in the sinoatrial node and whose conduction through the atria, atrioventricular node, and ventricles is unimpaired. The interval between complexes is regular, the ventricular rate is 60 to 100, there are upright P waves in leads I and…

A fractured bone that fails to heal properly. A condition in which a fractured bone fails to heal, preventing the fragments of bone from forming an uninterrupted, anatomically correct structure. Fracture non-unions are more common among adults and tend to occur more often among smokers. The bone of the upper arm and the shinbone are…

Thyroid enlargement without excessive production of thyroid hormone.