Medical Definitions - I

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Idiopathic - occurring without known cause; relating to a disease that is not the result of any other disease.

IJ Line - internal jugular line.

iNO - inhaled nitric oxide; relaxes blood vessels so that blood flows more freely.

Intercostal muscle - muscle tissue between two ribs.

Interstitial lung disease (ILD) - also known as diffuse parenchymal lung disease (DPLD); a group of lung diseases affecting the interstitium of the lung: alveolar epithelium, pulmonary capillary endothelium, basement membrane, perivascular and perilymphatic tissues. The term ILD is used to distinguish these diseases from obstructive airways diseases.

Intestinal malrotation - a congenital anomaly of rotation of the midgut.

Intra-axial hemorrhage - bleeding occurs within the brain tissue rather than outside of it.

Intraparenchymal hemorrhage - one of the main kinds of intra-axial hemorrhages; it occurs within the brain tissue rather than outside of it.

Intraventricular hemorrhage (IVH) - one of the main kinds of intra-axial hemorrhages; bleeding into the brain's ventricular system, where the cerebrospinal fluid is produced and circulates through towards the subarachnoid space.

Intubate - to put a tube into a hollow organ or passageway, often into the airway.

Ischaemia - a reduced blood supply.

Ischaemic (ischemic) heart disease - also known as myocardial ischaemia; a disease characterized by reduced blood supply to the heart. It is the most common cause of death in most western countries.

Isochromosome - a chromosome that has lost one of its arms and replaced it with an exact copy of the other arm.

IV - intravenous; the placement of a needle or catheter into a vein to administer medication, saline, etc.