A method for operating a breastpump unit for expression of human breastmilk and a breastpump unit. The breastpump unit having a pump assembly for generating vacuum pressure, a reservoir for receiving breastmilk, and a breast shield for sealing application to a breast to be pumped. The breast shield has a flexible inner chamber for receiving a nipple of the breast and a second chamber, in particular an outer chamber extending about the outside of the inner chamber and which at least partially surrounds a nipple that is inserted into the inner chamber. The method includes a cycle including evacuating the inner chamber and the reservoir by the pump assembly to a first vacuum pressure, connecting the second chamber to the pump assembly and to the reservoir 24 and evacuating the second chamber to a second vacuum pressure, in which the second vacuum pressure is higher or greater than the first vacuum pressure, and at least partly releasing the vacuum from the second chamber to a lower vacuum pressure, in particular lower than the first vacuum pressure.

A breast shield for expressing human breast milk. The breast shield includes an outer housing and a flexible inner liner within the outer housing. In use, with the breast shield applied to a breast, the inner liner is in contact with the surface of both the areola and nipple of the breast. The breast shield further includes an outer chamber between the outer housing and the inner liner and an inner chamber within the inner liner. In use, the inner and outer chambers, are subjectable to differential pressure and the differential pressure is operable to cause the inner liner to exert a massaging effect against the surface of both the areola and nipple of a breast.

Dressings and kits for use in wound therapy and negative-pressure therapy comprising a manifold layer comprising porous open-cell liquid permeable foam and a polymer composition The polymer composition comprises a polymer and an active agent, such as collagen and oxidized regenerated cellulose. The foam may be felted. Methods of making and using the dressings are also provided.

This disclosure describes devices, systems, and methods related to oxygenated hemoglobin, the generation thereof, and the use thereof. An exemplary oxygenated hemoglobin therapy system includes an oxygen source configured to provide oxygen and a hemoglobin source configured to provide topical hemoglobin. The therapy system may also include a mixer which has a first inlet, a second inlet, and an outlet. The mixer is configured to mix the oxygen and the topical hemoglobin to form a mixture and to provide the mixture to a dressing via the outlet. The therapy system may further include the dressing. The oxygenated hemoglobin therapy systems described herein are suitable for use in medical devices, such as bandages, drapes, dressings, and wound closures.

An aspiration system for aspirating blood clots from a human body has a power source, an aspiration pump, and an electrical motor coupled to the power source and the aspiration pump, wherein the aspiration pump is pulsed at a frequency below 10 Hz.

A clot removal system comprises a catheter, a vacuum source, and a controller. The catheter comprises a proximal end, a distal end, and controller operating parameters and defines a lumen configured to be filled with a liquid column having a proximal portion. The vacuum source is configured to supply vacuum. The controller is configured to carry out a control pattern of turning on and off the vacuum based upon the controller operating parameters and is configured to receive the controller operating parameters in an automatic response to the catheter being operatively connected to at least one of the vacuum source and the controller and, responsive to the connection, to carry out the control pattern to change a level of vacuum at the distal end of the catheter.

In some examples, a medical aspiration system includes a flow switch configured to passively close to restrict aspiration of a body fluid from a body of a patient. In some examples, the flow switch includes a housing defining an internal cavity, and proximal and distal openings to the internal cavity, where the internal cavity is configured to receive the aspirated fluid from a catheter. The flow switch further includes a plug disposed within the internal cavity and configured to move proximally, in response to an above-threshold drag force from a fluid flow of the aspirated fluid within the internal cavity applied to a distal-facing surface of the plug, in order to close the proximal opening; and move distally to open the proximal opening in response to an absence of the fluid flow within the internal cavity.

A system comprises a negative-pressure source including a pump and an electric motor for maintaining negative-pressure at the wound and a pressure sensor for sensing a wound site pressure (WP). The system further comprises a system controller coupled to the first pressure sensor and the electric motor. The system controller maintains the wound site pressure (WP) within a hysteresis band by the application of power to the electric motor from a battery power source, based upon, at least in part a flow rate (FR) of fluid between the pump and the wound site as determined by the system controller. The hysteresis band including a maximum wound site pressure (WPMax) and a minimum wound site pressure (WPMin).

Systems, devices and methods for use in liposuction and infusion medical procedures including handheld devices, micro-cannulas, curved cannulas vacuum pressure changing features.

An aspiration catheter is provided including a proximal section and a distal section extendable through the proximal section. A vacuum transfer tool may be coupled to a proximal end of the proximal section. The vacuum transfer tool may include a proximal transfer tube and a distal transfer tube, each having an aspiration port in communication with a vacuum source. The proximal transfer tube may be removably received within a proximal end of the distal transfer tube. The proximal transfer tube may maintain a vacuum around the proximal end of the distal section of the catheter such that when the distal section is removed by decoupling the proximal and distal transfer tubes, the vacuum within the distal transfer tube and proximal section of the catheter is maintained, preventing the escape of any clots.