A waste collection unit for collecting medical waste through a suction line. The waste collection unit includes a manifold receiver having an opening in fluid communication with a canister. A suction pump is configured to draw a vacuum, and a vacuum regulator is configured to regulate the vacuum draw. A light assembly positioned near the opening of the manifold receiver may include a first light and a second light. The light assembly may be arranged to direct the first light towards a manifold configured to be removably received in the manifold receiver. The light assembly may be arranged to direct the second light arcuately around at least a portion of the opening of the manifold receiver. The first light may emit light of different colors based on a commanded or measured level of the vacuum draw.

Devices and methods for collecting and sensing fluid flow are provided.

A cannula device for draining sub-retinal fluid externally to the eye includes a shaft, an outer sleeve, and an inner sleeve. The outer sleeve and the inner sleeve have a curve therein to access the back of the eye externally. The outer sleeve is extendable relative to the inner sleeve and the shaft, and the outer sleeve includes a penetrative tip to penetrate the sclera and provide access to the sub-retinal fluid to the inner sleeve.

A method for collecting and filtering biological material from blood and other fluids during a surgical procedure includes: attaching a first cover including a suction port and an intake port to a collection trap; attaching a suction source to the suction port; attaching an instrument to the intake port, through which blood and tissue are suctioned and received into the collection trap; filing the collection trap with blood and tissue; removing the collection trap from the first cover; attaching a second cover to the collection trap in place of the first cover, the second cover including a suction port and a plunger, the plunger including a press head having a screen portion permitting blood and other fluids to pass; attaching a suction source to the suction port of the second cover; separating the blood from the tissue by deploying the plunger; and drawing off the blood through the suction port.

A liquid-collection canister includes a liquid collection chamber defined by at least one wall and a first and second gas-communication pathway formed within the at least one wall. A first aperture is positioned between the first gas-communication pathway and the liquid collection chamber to allow gaseous communication between the liquid collection chamber and the first gas-communication pathway. A second aperture is positioned between the second gas-communication pathway and the liquid collection chamber to allow gaseous communication between the liquid collection chamber and the second gas-communication pathway. A first and a second liquid-air separator are positioned over the first aperture and the second aperture, respectively, to substantially prevent liquid passing through the first and second apertures.

Systems, assemblies, and methods for providing negative-pressure therapy to a tissue site are described. The system can include an absorbent and a sealing layer configured to cover the absorbent. The system can also include a blister fluidly coupled to the absorbent. The blister may have a collapsed position and an expanded position. A first check valve may be fluidly coupled to the absorbent and the blister and configured to prevent fluid flow from the blister into the absorbent if the blister is moved from the expanded position to the collapsed position. A second check valve may be fluidly coupled to the blister and the ambient environment and configured to prevent fluid flow from the ambient environment into the blister if the blister is moved from the collapsed position to the expanded position.

A saliva collector comprises a reservoir, a bubble barrier, and a membrane, where the bubble barrier and membrane are arranged in tandem on a flow path from an inlet to an outlet on the reservoir. Air aspirated from a patient's oral cavity enters the reservoir through the inlet, passes through the bubble barrier to remove foam and bubbles, passes through the membrane to remove entrained liquid saliva, and passes out through the outlet.

A wound treatment appliance is provided for treating all or a portion of a wound. In some embodiments, the appliance includes an impermeable flexible overlay for applying a reduced pressure to the covered portion of the wound. The wound treatment appliance may also include a vacuum system to supply reduced pressure to the wound in the area under the flexible overlay, a wound packing means to prevent overgrowth of the wound or to encourage growth of the wound tissue into an absorbable matrix including the wound packing means, a suction drain, a collection chamber to collect and store exudate from the wound, and/or a suction bulb which may be used to provide a source of reduced pressure to an impermeable overlay that covers all or a portion of the wound. Finally, methods are provided for using various embodiments of the wound treatment appliance.

A method for washing a suspension of cells including a suspension fluid and a plurality of cells is provided. The method includes using centripetal force to generate a layer of wash solution against a cylindrical wall and to generate a cell suspension layer adjacent to the layer of wash solution. The method also includes forcing the cells through the layer of wash solution to generate a layer of clean cells. Devices for performing the method are also provided.

A specimen collection assembly including a flow control member for adjustably altering a flow path is disclosed. In one configuration, the flow control member defines a regulation channel in fluid communication with a lumen of a cannula, wherein the flow control member is configured to adjustably alter an effective flow distance between the lumen of the cannula and an interior of an evacuated collection container. In another configuration, the flow control member is positioned to vary an effective cross-sectional area of at least one of an inlet port and an outlet port adapted to be in fluid communication with the lumen and the evacuated collection container.