plethor-, plethysmo- +

An apparatus for measuring respiratory volumes by recording changes in body volume.

A body box that is used to measure lung volume and pressure.

This device is used for studying alveolar pressures, lung volumes, and airway resistance. The patient sits or reclines in an airtight compartment and breathes normally.

The pressure changes in the alveoli (tiny sac for holding air in the lungs) are reciprocated (alternated direction of motions) in the compartment and are recorded automatically.

A plethysmograph, a measuring instrument for measuring changes in volume resulting from fluctuations in the amount of blood that is applied to a digit (finger or toe) of the hand or foot in order to measure skin blood flow.

1. An instrument that uses gas-to-tissue ratio to set an alarm or to measure a volume.
2. A technique for determining blood vessel occlusion that determines volumetric changes in a limb by measuring changes in its girth as indicated by changes in the electric impedance of mercury-containing polymeric silicone tubes in a pressure cuff.

1. Equal in quantity: "An isopleth can be a line, on a chart, showing equal quantities, conditions, or frequencies of any phenomenon in its relation to two independent coordinates."
2. Lines on a map that join geographical points which have the same value for a particular continuous variable.

A reference to a line on a map that connects points at which a given variable has a specified constant value.

1. Excess; overabundance; a very large amount or number of something, especially an excess amount.
2. An excess of blood in the circulatory system or in one organ or area; especially in the facial veins, causing a ruddy complexion.
3. Etymology: from about 1541, "excess, superabundance" and a medical word for "excess of body fluid", from Late Latin plethora, from Greek plethore, "fullness" from plethein "to be full".

In our modern times, plethora is more often used in a general, non-medical sense, with the meaning of "excess" or "abundance",

The figurative meaning of "too much, over fullness in any respect" was first recorded in about 1700.

A temporary increase in the volume of the blood in other parts of the body, caused by forcing blood from a part that is to be amputated.

Having the characteristics of a plethora or an excess of red blood cells or bodily fluids.

1. Excessive in quantity; overabundant; excessive in style.
2. Overfull; turgid; inflated: "He made a plethoric, pompous speech."
3. Pertaining to, or characterized by plethora.
4. Marked by an excess of blood.
5. By extension, a red florid complexion: sanguine, sanguineous.

A reference to that which is excessively abundant, overabundant, or present in great quantities.

1. A condition of being overly full; excessive; superabundance.
2. Too full; especially, excessive fullness of the blood vessels; a situation in which the blood vessels of the bodily system exceeds a healthy standard of blood in quantity.

A record or tracing produced by a plethysmograph (an instrument for measuring changes in volume of a part, or organ, or whole body; usually, resulting from fluctuations in the amount of blood it contains).

An instrument for determining and registering the variations in the size or volume of bodily organs or the limbs; such as, the arms or legs, and hence the variations in the amount of blood in the limb.

Referring to an instrument used to determine and to register the variations in the sizes or volumes of the arms or legs; and therefore, the variations in the amount of blood in those limbs.