A system is illustratively described herein that generally comprises a vacuum chamber, an ambient pressure chamber, a valve configured for unidirectional flow from the vacuum chamber to the ambient pressure chamber during a charging stroke, and a liquid filter configured to retain liquid in the pump. In some embodiments, the liquid filter is configured to retain liquid in the vacuum chamber during the charging stroke. In other embodiments, it may be configured to retain liquid in the ambient pressure chamber during an operating stroke. In more particular embodiments, a piston may be disposed between the vacuum chamber and the ambient pressure chamber, a passage may fluidly couple the vacuum chamber and the ambient pressure chamber, and the valve can be configured to control fluid flow through the passage. Additionally, a lumen may couple the vacuum chamber to a dressing to deliver negative pressure to the dressing in some illustrative embodiments.

A device comprises a syringe comprising a syringe body portion and a plunger portion configured to engage with and slide axially within the body portion; a tube set fitted to the syringe. The tube set may comprise a proximal tube attached to the plunger portion at a proximal end thereof and terminated, at a distal end thereof, by a beak assembly configured to assume a first configuration suitable for coring through tissue and a second configuration suitable for tissue penetration and parting off tissue; and a distal tube disposed over and coupled to the proximal tube to enable travel-limited axial displacement relative to the proximal tube. Axially moving the plunger portion of the plunger portion within the body portion of the syringe causes differential movement of the proximal tube relative to the distal tube to selectively cause the beak assembly to assume the first or the second configuration.

Methods and devices for treatment of damaged tissue are disclosed, including treatment of wounds by employing non-electrically powered, reduced pressure therapy devices. Maintenance and control of the sub atmospheric pressure exerted may be provided by such devices while minimizing discomfort to the user. The devices may be configured to be worn inconspicuously underneath clothing.

Disclosed herein are devices and methods for reduced pressure tissue therapy. Some variations of suction devices for reduced pressure tissue therapy comprise a housing, a suction force generating mechanism located within the housing, and a storage module configured to retain tissue exudates. In some variations, the storage module includes a sleeve configured to collect tissue exudates. The sleeve may include a support element to help maintain the lateral structural integrity of the sleeve and/or retain the cross-sectional geometry of the sleeve under negative pressure. In use, the storage module may reduce sanitary and/or biohazard risks by preventing the exudates from contacting the housing and/or suction force generating mechanism. The storage module is configured to be replaced so that the housing and suction force generating mechanism can be used for more than one session.

The apparatus for cupping includes a cupping bell, a suction chamber, and a piston member with a handle and piston skirt. The suction chamber connects to the cupping bell, and actuation of the piston member through the suction chamber creates a vacuum in the cupping bell. Skin and soft tissue adjacent to the opened end of the cupping bell is suctioned into the cupping bell for cupping therapy of the treatment area. The suction chamber has a locking device cooperative with a locking notch on the piston so that dimensions of the piston member correspond to set levels of suction in the cupping bell with continuous pressure when increasing suction during a treatment. The cupping bell has a flared portion for engaging the treatment area with less trauma and pain for the patient.

A biopsy punch includes a hollow longitudinal shaft with an inner perimeter proximal restriction point and an inner perimeter distal restriction point; a tubular blade affixed to a distal end of the hollow longitudinal shaft, wherein the tubular blade forms a first chamber; a plunger configured to slide within the hollow longitudinal shaft; a withdrawer/ejector housed within the plunger; a withdrawer/ejector piston affixed to a distal end of the withdrawer/ejector; a restriction piston affixed around a perimeter of the plunger; a second chamber formed within the plunger between a distal end of the plunger and the withdrawer/ejector piston; and a hollow needle configured to move into and out of the first chamber via the plunger, wherein the hollow needle is affixed at a proximal end to the distal end of the plunger, and wherein the proximal end of the needle extends into the second chamber.

A devise for retracting or opening a tissue wound employs two retractor arms that do not enter or penetrate into the wound. The retractor arms engage the tissue on either side of the wound and apply outward pressure on the tissue surface to open the wound.

Described herein are alarm systems for suction devices for reduced pressure therapy. Alarms systems provide alerts to the patient and/or practitioner regarding the ability of the suction device to continue to provide negative pressure to a tissue region. Alarm systems comprise a sensor mechanism, which is capable of detecting the position of a slidable seal within the suction device, and generating an alert. Certain variations of alarms systems comprise magnetic field sensitive switches and/or electric switches. Other variations of alarm systems comprise rotary encoders to detect the motion and location of constant force springs, which signal the notification mechanism to issue alerts accordingly. Described herein are alarm devices configured to retain a suction device therein and to attach the suction device to a patient. The alarm devices disclosed herein detect the depleted state of the suction device and are capable of retaining the suction device in a plurality of orientations.

A delivery system and method suitable for delivering a fluid to an interior of a bone and for removing fluid including bodily material from the interior of the bone. The delivery system includes a proximal portion graspable by a user and in fluid communication with a source of negative pressure and a delivery fluid. A delivery cannula has a length sufficient to extend from the proximal portion to a distal tip insertable into the interior of the bone to deliver the delivery fluid into the bone. A removal cannula has a length sufficient to extend from the proximal portion to a distal tip insertable into the interior of the bone to withdraw fluid including bodily material from the bone.

A fluid drainage device which includes a fluid-receiving volume, a cover which is movable between a first limiting position at which an inlet port is in fluid communication with the volume and a second limiting position at which an outlet port is in fluid communication with the volume, a piston which is movable inside the volume between a first position and a second position, a handle which is moveable in a first direction to cause the piston to move to the first position and to store energy in a spring so that, when the cover is in the first limiting position the piston is moveable by energy released from the spring to reduce pressure in the volume, allowing fluid flow through the inlet port, and wherein movement of the handle in a second direction causes the piston to move to the second position thereby expelling fluid from the volume.