Time-integrated sampler of bodily fluid
AssigneeThe Board of Trustees of the University of Illinois
InventorsRobert N. Corley, III, Michael R. Murphy, Samuel V. Panno
Life of this patent
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Abstract
An apparatus and corresponding method obtains time-integrated samples of fluid from the rumens of cattle, sheep, goats or other animals through a cannula. The apparatus allows ruminal fluid to be sampled under standard conditions. It reduces the labor required to obtain samples and allows dynamic fermentation patterns to be followed. The apparatus includes a ceramic filter connected to a sampling tube assembly. The filter is placed in the rumen and vented to atmosphere by a first tube. A second tube connects an inside region of the filter to a peristaltic pump which removes fluid for time-integrated sampling.
Claims20
A system for sampling bodily fluid in an animal's body, comprising:
- a collection vessel;
- a cup-shaped ceramic filter adapted to be placed at a sampling site within the body of the animal;
- an inner tube flow-connected to a collection region within said ceramic filter at one end and adapted to extend out of the animal's body to a second end;
- an outer tube coaxially surrounding said inner tube and having a first open end adjacent said ceramic filter and a second end adapted to extend to an outside of the animal's body;
- and
- a peristaltic pump having an inlet connected to said inner tube and an outlet connectable to said collection vessel.
A method for sampling bodily fluid in an animal's body comprising the steps of:
- providing a filter element having a filtering wall in fluid communication with an internal void;
- connecting the filter element to a tube for removing fluid collected in said filter element;
- inserting the filter element at a sampling site within the body of the animal and collecting fluid passing through the filtering wall within the internal void of the filter element;
- and
- removing fluid collected in said internal void by a pump while maintaining pressure within the internal void at near atmospheric pressure.
A sampling apparatus for sampling fluids inside an animal's body comprising:
- a peristaltic pump;
- a filter element adapted to be placed inside the body of the animal and comprising a filtering media defining an outside surface and an inside surface that defines an enclosed volume;
- a first tube flow-connected to said enclosed volume at one end and open at an opposite end;
- and
- a second tube flow-connected to said enclosed volume at one end and to a suction of said peristaltic pump at an opposite end.
A sampling apparatus for sampling fluids inside an animal's body comprising:
- a peristaltic pump;
- a filter element comprising a filtering media defining an outside surface and an inside surface that defines an enclosed volume;
- a first tube flow-connected to said enclosed volume at one end and open at an opposite end;
- a second tube flow-connected to said enclosed volume at one end and to said peristaltic pump at an opposite end;
- and
- an outer conduit connected to said filter element at one end and connected to a cannula cover at a position on said outer conduit spaced from said filter element, said first and second tubes fit within said outer conduit.
A sampling apparatus for sampling fluids inside an animal's body, comprising:
- a suction device having an inlet for drawing fluid;
- a filter element adapted to be placed inside the body of the animal and having a porous filtering wall and an enclosed void at least partly defined by said porous filtering wall;
- a first tube flow-connected to said void at one end and open at an opposite end, said tube adapted for said opposite end to be outside the body of the animal;
- and
- a second tube flow-connected to said void at one end to said inlet of said suction device at an opposite end.
Dependencies are inferred from the claim text.