| 释义 |
plethysmograph Physiol.|plɪˈθɪzməgrɑːf, -æ-|
[f. Gr. πληθυσµός enlargement (f. πληθύνειν to increase, f. πληθύς fullness) + -graph, after It. pletismografo.]
An instrument, invented by Mosso of Turin c 1870, for recording and measuring the variation in the volume of a part of the body, esp. as due to the changes in the circulation of the blood produced by emotion, etc.
It consists of a closed vessel surrounding the part of the body, filled with water, air, or other fluid, and connected with a means of measuring its displacement.
1872Sci. Amer. July 403/1 By using two plethysmographs, Dr Mosso has obtained pen traces representing..valuable physiological data leading to the demonstration of the most important phenomena of the blood vessels. 1882Hardaker in Pop. Sci. Monthly XX. 578 The plethismograph..measures the amount of blood sent to the brain in any particular process of thought, and records the exact time for each process. 1896Allbutt's Syst. Med. I. 343. 1957 Clin. Sci. XVI. 103 (heading) Venous collection in forearm and hand measured by the strain-gauge and volume plethysmograph. 1964Times 5 Sept. 12/3 A small electronic instrument called a plethysmograph used for measuring changes of blood volume in the body's circulation. 1972English Studies LIII. 76 Measurements were made..of the variations in volume of the air in the lungs. This..involved the use of a plethysmograph, a rigid airtight container enclosing the subject entirely except for head and neck.
Hence pleˌthysmoˈgraphic a., belonging to, or obtained by, the plethysmograph; pleˌthysˈmographically adv., by means of a plethysmograph; plethyˈsmography, the use of the plethysmograph.
1886Medical News XLIX. 276 In experiments made with the plethysmographic method..it was found that..a constriction..may be produced by an electric stimulation of the sciatic nerve. 1890Webster, Plethysmography. 1897Jrnl. Exper. Med. II. 334 The striking effect of such stimuli upon the volume of a limb when measured plethysmographically. 1898Jrnl. Physiol. XXII. 380 A few experiments on intestinal plethysmography were made by Bayliss. 1899Allbutt's Syst. Med. VII. 745 Plethysmographic observations on the cutaneous circulation. 1930Amer. Jrnl. Physiol. XCI. 717 That the abdominal venous reservoirs empty (into the chest) during systole can be demonstrated by abdominal plethysmography. 1970Nature 18 July 276/2 The volume of the foot was measured plethysmographically before injection of carrageenin. 1977Lancet 9 July 66/1 Strain-gauge plethysmography is probably an appropriate method for demonstrating arterial insufficiency in this condition. |