diffusion chamber

chamber /cham·ber/ (chām´ber) an enclosed space.

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anterior chamber of eye  the part of the aqueous-containing space of the eyeball between the cornea and the iris.

aqueous chamber  the part of the eyeball filled with aqueous humor; see anterior c. and posterior c.

counting chamber  the part of a hemacytometer consisting of a microscopic slide with a depression whose base is marked in grids, and into which a measured volume of a sample of blood or bacterial culture is placed and covered with a cover glass. Cells and formed blood elements in any given square can then be counted under a microscope.

diffusion chamber  an apparatus for separating a substance by means of a semipermeable membrane.

Haldane chamber  an air-tight chamber in which animals are confined for metabolic studies.

hyperbaric chamber  an enclosed space in which gas (oxygen) can be raised to greater than atmospheric pressure.

ionization chamber  an enclosure containing two or more electrodes between which an electric current may be passed when the enclosed gas is ionized by radiation; used for determining the intensity of x-rays and other rays.

posterior chamber of eye  the part of the aqueous-containing space of the eyeball between the iris and the lens.

pulp chamber  the natural cavity in the central portion of the tooth crown that is occupied by the dental pulp.

relief chamber  the recess in a denture surface that rests on the oral structures, to reduce or eliminate pressure.

Thoma-Zeiss counting chamber  a common type of counting c.

vitreous chamber  the vitreous-containing space in the eyeball, bounded anteriorly by the lens and ciliary body and posteriorly by the posterior wall of the eyeball.

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diffusion chamber

Therapeutics A biohybrid device in which cells of interest–pancreatic islet cells–are placed in chamber and implanted via trocar or incision in the peritoneum or subcutis; the DC is like the earlier perfusion chamber, and the currently preferred microsphere, a type of encapsulated cell therapy, which in some cases, achieves adequate glucose control. See Artificial pancreas, Biohybrid artificial pancreas.