摘要:
A long indwelling double bore catheter (10) for dilution and sampling of blood on a continuing basis capable of being used for long periods of time. The long indwelling double bore catheter has a small mixing chamber (20) with an opening of a cross-sectional area (34) equal to or less than the combined cross-sectional areas of the double bores, said opening communicating with the body fluid, e.g., blood, to be sampled, and wherein the distance of the mixing chamber from the distal end of the double bores to the end of the catheter is equal to or greater than 2 millimeters. Preferably, the volume of the mixing chamber is between about 3 and about 9 x 10- 5 cubic inches. Preferably, the opening which communicates with the body fluid is a noncircular elongated opening (22) which is equal to or less than twice the combined cross-sectional areas of the double bores.
摘要:
A method is provided for determining the amount of IgG present in a neonatal foal or calf or in the colostrum of a dam or cow. The method involves contacting a body fluid sample with biologically inert latex particles, measuring the amount of agglutination which occurs, and determining the amount of IgG present. The latex particles are diluted to a final concentration of from about 0.65 to 2.0 percent (w/v) at a pH of from about 7.5 to 9.0 with a buffer. The body fluid is diluted to a range of from .01:12 parts to .01:2160 parts, v/v basis, at a pH of from about 7.5 to 9.0.
摘要:
A composition, test device and method for detecting the presence and/or determining concentration of glucose in a liquid test sample are disclosed. The composition is capable of determining glucose concentration over a broad range, e.g. 0 to about 5,000 milligrams (mg) of glucose per deciliter (d1) of test sample. Moreover, the composition is resistant to interference from the presence of ascorbate in the sample. The composition comprises glucose oxidase, peroxidase and, as an indicator capable of producing a detectable response in the presence of peroxidase and H 2 0 2 , a mixture of two compounds. One has the structure and the other has the structure in which R, same of different, is H or lower alkyl, R' is aryl and R" is lower alkyl.
摘要:
A composition, test device and method for determining the presence of leukocytes, esterase and/or esterase activity in a test sample is disclosed. The composition comprises an ester which, when cleaved by esterolytic activity, produces a detectable response such as color formation. In addition the composition comprises the compound 3-quinuclidinol. The device is prepared by incorporating a carrier matrix, such as paper, with the composition. The method comprises contacting a test sample with the device and observing a detectable response.
摘要:
Disclosed is a Romanowsky stain having improved stability characteristics which comprises a methanol solution of Methylene Blue, an azure dye and the free acid of Eosin Y.