| 单词 | perfusion |
| 释义 | perfusion|pəˈfjuːʒən|
[ad. L. perfūsiōn-em, n. of action f. perfundĕre: see prec.]
a. The action of pouring (a fluid) on or over; shedding on; diffusion through.
1574Newton Health Mag. 9 There should ensue an oyntement or perfusion of temperate oyle. 1632tr. Bruel's Praxis Med. 291 The perfusion of naturall heate..doth giue life to the wormes. 1666Harvey Morb. Angl. iv. 47 A perfusion of a just proportion of gall. 1700Sir J. Floyer Cold Baths i. ii. 41 A large Perfusion of Cold Water recollects the heat. 1775Sir E. Barry Observ. Wines 294 Leave to others the active parts of the perfusions, detersions, &c.
b. spec. The pouring over of water in baptism, as opposed to immersion.
1607Schol. Disc. agst. Antichr. i. ii. 112 What, and serueth the signe of the water..for the time only of the perfusion? 1711J. Gale Refl. Wall's Hist. Inf. Bapt. 134 This rite was wont to be performed by immersion, and not by perfusion. 1889Drysdale Hist. Presbyt. Eng. 439 Perfusion (pouring or sprinkling) was not accounted unlawful.
c. concr. That which has been poured over. rare.
1848Ecclesiologist VIII. 99 Wine for the ablution of the chalice of the mass, and also another chalice to receive the perfusion of the fingers.
d. Med. The process of passing through an organ or tissue a fluid, esp. treated blood or a substitute for blood; the treatment of a patient by a continuous transfusion of prepared blood. Freq. attrib.
1903Jrnl. Physiol. XXIX. 266 Special arrangements were provided for quantitatively determining the changes of the blood gases in the perfusion. 1910Ibid. XL. 297 Perfusion experiments with tortoise hearts were made by Gaskell in 1883, his perfusion liquid being a mixture of 1 part of sheep's blood and 2 of saline. 1940C. S. Sherrington Man on his Nature iii. 87 The perfusion-fluid itself is chemical nutriment for all the cells of the body, supporting their energy-needs. 1963Gastroenterology XLIV. 134/2 Absorption was studied by transintestinal intubation with polyvinyl tubing..with a perfusion technique. 1969Jrnl. Physiol. CCIV. 22p In order to show that it was the ionic composition of the perfusion fluid which produced the changes..rather than the experimental procedure, perfusion of both vasa deferentia with Krebs–Ringer preceded perfusion of one vas deferens with the test solution. 1972Brit. Med. Jrnl. 1 Jan. 23/1 Two patients in deep hepatic coma due to fulminant viral hepatitis were treated by extracorporeal baboon liver perfusion. Ibid. 23/2 The liver was aseptically removed from healthy baboons..; it was immediately cooled by perfusion with a chilled electrolyte solution..and then taken to the perfusion apparatus in the patient's room. Perfusion was started after 30–40 minutes of cold ischaemia and was maintained for a period of 13–16 hours. |
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