A device for drainage includes a tubular reservoir having a tubular pliable wall, a rigid cover, and a rigid bottom, and also includes at least one spring which applies a force that presses the cover and the bottom apart, wherein the cover is movable in the direction of the bottom in order to place the spring into a start position. One or more magnets are configured such that the magnets apply an additional force on the reservoir in such a way that a resulting force pressing the cover and the bottom apart is substantially constant across as the spring is deflected.

The illustrative embodiments described herein are directed to a manually-actuated pump and method for applying reduced pressure at a tissue site. The manually-actuated pump includes at least one variable volume chamber that is manually compressible into a plurality of positions. The manually-actuated pump includes a fixed volume chamber in communication with the at least one variable volume chamber. The manually-actuated pump also includes a filter housing having a hydrophobic filter that prevents liquid from entering the at least one variable volume chamber. The fixed volume chamber is coupled to the at least one variable volume chamber via the filter housing. The filter housing is located in between the at least one variable volume chamber and the fixed volume chamber. The fixed volume chamber has reduced pressure that is applied to the tissue site in response to a movement of the at least one variable volume chamber from a compressed position in the plurality of positions to an uncompressed position in the plurality of positions.

A negative pressure wound treatment (NPWT) apparatus for suction of bodily fluids using the negative pressure generated by means of manual pressing. The NPWT apparatus is made of two parts: [1] top functional part; and [2] bottom collector part. The top functional part is made of a pressing mechanism attached to a bellow enclosed within an enclosure which creates negative pressure sucking the bodily fluid from the wound. The bottom collector part is attached with the bellow through the internal one-way valve, wherein the collector collects the fluid from the bellow. Pressure levels and wound conditions are measured and transmitted to the user's smart device, in order to enhance treatment monitoring and efficacy.

The present invention provides a device for wound treatment, comprising a chamber that includes an inner surface and defines a treatment space, the chamber being made of a flexible, impermeable material. The device further includes a plurality of structures configured to exert mechanical stress on a wound, the plurality of structures intruding from the inner surface of the chamber into the treatment space. The device further includes a tube having a first end connected to the chamber, the tube being in fluid communication with the treatment space so as to enable at least one selected from the group of applying negative pressure to the treatment space and applying a therapeutic agent.

Devices and methods for wound treatment are disclosed. A chamber may define a treatment space having an interior engineered surface including a plurality of structures configured to provide pathways for the distribution of negative pressure and to exert mechanical stress on a wound. In some specific embodiments, the devices and methods may treat wounds on the head, neck, and face. One or more tubes may be in fluid communication with the treatment space to facilitate the application of negative pressure, the introduction of therapeutic agents, and the removal of wound material.

A manually-activated reduced pressure treatment system includes a substantially rigid housing, and an end cap slidingly received by the housing. An inner chamber is disposed between the end cap and housing, and a volume of the inner chamber is variable in amount depending on the position of the end cap within the housing. The end cap is slidingly movable between an uncompressed position at which the volume of the inner chamber is at a maximum value and a compressed position at which the volume of the inner chamber is at a minimum value. A position indicating member is associated with the end cap and housing to indicate the position of the end cap relative to the housing at predetermined positions between the uncompressed position and the compressed position.

A dressing for treating a tissue site with negative pressure including a tissue interface, a cover, a chamber wall, and a base. The cover may be adapted to be sealed to epidermis proximate the tissue site. The chamber wall may define a pump chamber, wherein the pump chamber may be adapted to be fluidly coupled to the tissue interface. The base may extend from the chamber wall, wherein the base may be fluidly sealed to the cover. The dressing may include an intake valve and an exhaust valve fluidly coupled to the pump chamber. The pump chamber may be compressed to evacuate fluid from the pump chamber through the exhaust valve. The pump chamber may then be expanded to draw fluid through the intake valve from the tissue interface. This supplies a negative pressure to the tissue interface which may be adapted to distribute negative pressure across the tissue site.

A manually-activated reduced pressure treatment system includes a substantially rigid housing, and an end cap slidingly received by the housing. An inner chamber is disposed between the end cap and housing, and a volume of the inner chamber is variable in amount depending on the position of the end cap within the housing. The end cap is slidingly movable between an uncompressed position at which the volume of the inner chamber is at a maximum value and a compressed position at which the volume of the inner chamber is at a minimum value. A position indicating member is associated with the end cap and housing to indicate the position of the end cap relative to the housing at predetermined positions between the uncompressed position and the compressed position.

An air extraction device and a nasal aspirator. The air extraction device includes a cylinder body and a variable-volume body. The cylinder body defines a cavity and a first air hole, and the first air hole is in communication with the cavity. The variable-volume body is arranged within the cavity. The variable-volume body is configured such that, through a change in a volume of the variable-volume body within the cavity from large to small, an air pressure within the cavity is reduced, for providing a suction force externally through the first air hole.