An apparatus includes a cannula assembly and a sensor assembly. The cannula assembly includes a proximal end, a distal end, and a first lumen extending from the proximal end to the distal end. The cannula is formed of a rigid material. The sensor assembly includes a sensor and a communication wire. The sensor is fixed to the cannula assembly. The communication wire is in electrical communication with the sensor. The communication wire extends along a length of the cannula assembly exterior to the first lumen.

A pump generates a vacuum at a wound site via first tubing. A negative pressure circuit is defined by a canister, the first tubing and the wound site. A controller of a therapy device operates the pump to apply a first negative pressure to the entirety of the negative pressure circuit, following which ambient air is allowed to flow into the negative pressure circuit. The controller also operates the pump to apply a second negative pressure to a selected portion of the negative pressure circuit exclusive of the wound site, following which ambient air is allowed to flow into the selected portion. A quantity of fluid to be delivered to the wound site via a second tubing is determined by comparing measured parameters related to the flow of air into the negative pressure circuit to parameters measured with respect to the flow of air into the selected portion.

Many embodiments of wound filling devices and methods of their use in systems for the application of negative pressure therapy are described herein. In one embodiment, a wound filling device comprises: an inflatable bag member having at least one fluid carrying conduit operably connected thereto to inflate/deflate said bag member; a separate textured covering sock member at least partially covering the inflatable bag member. Another embodiment comprises a three-dimensional wound packing member, and may optionally comprise a plurality of such members linked together. Certain embodiments of wound packing members may comprise a porous bag member adapted to be non-adherent to the wound. Yet other embodiments may comprise a non-porous bag member provided with means to connect a fluid supply to the interior.

Disclosed herein are systems and methods directed to an assisted fluid drainage system including one or more ejector vacuum pumps disposed in-line with the drainage tube. The one or more pumps can use a venturi effect vacuum pump to draw a fluid in and urge the fluid through the drainage tube to prevent the formation of dependent loops. Dependent loops can form within fluid drainage tubes when slack portions of tube create a positive incline. These dependent loops trap fluid and can create a retrograde flow, leading to various complications such as catheter associated urinary tract infections (“CAUTI”). Advantageously, the pumps can operate while the drainage lumen remains in fluid communication with the catheter. As such the pumps can operate continuously to prevent dependent loops from establishing.

Example fluid collection devices and methods of using the fluid collection devices are described. The fluid collection devices include a fluid impermeable barrier, an enlarged base, and a fluid permeable body. The fluid impermeable barrier has a first lateral dimension and at least partially defining a chamber, an aperture configured to receive a conduit therethrough, and an opening. The base extends from the fluid impermeable barrier distal to the aperture and has a second lateral dimension greater than the first lateral dimension. The fluid permeable body is positioned at least partially within the chamber to extend across at least a portion of the opening.

A closed system for harvesting fat through liposuction, concentrating the aspirate so obtained, and then re-injecting the concentrated fat into a patient comprises as its main components a low pressure cannula having between about 7 to 12 side holes of about 1-2 mm by 2.0 to 4.0 mm, a spring loaded syringe holder with a constant force or coiled ribbon spring to apply a substantially constant pressure over the full excursion of the plunger, and a preferably flexible collection bag which is also preferably graduated, cylindrical over most of its body and funnel shaped at its bottom, all of which are connected through flexible tubings to a multi-port valve. The multi-port valve has two flutter/duck bill valves which restrict the fluid flow to a one way direction which effectively allows the syringe to be used to pump fat out of a patient and into a collection bag in a continuous manner. After the bags are centrifuged to concentrate the fat, the excess fluids are separated and the valve is re-connected to permit the syringe pump to reverse fluid flow to graft the concentrated fat back into the patient.

Embodiments of negative pressure wound therapy systems and methods for operating the systems are disclosed. In some embodiments, a system includes a negative pressure source, a wound dressing configured to be positioned over a wound, and optionally a canister configured to store fluid aspirated from the wound. The negative pressure source, wound dressing, and canister (when present) can be fluidically connected to facilitate delivery of negative pressure to the wound. The system can be configured to automatically detect whether the canister is positioned in the fluid flow path between the negative pressure source and the dressing while negative pressure source provides negative pressure to the wound dressing. Operation of the system can be adjusted based on whether presence of the canister has been detected. For example, a value of an operational parameter can be set to indicate that the canister is present.

A waste collection unit including a waste container, and vacuum source to collect medical waste into the waste container. The vacuum source is disposed within a sound attenuating enclosure that defines an enclosure inlet for receiving cooling air and an enclosure outlet for discharging warmed cooling air. The sound attenuating enclosure is at least partially formed of a sound-absorbing material and may define a pocket for receiving a first end of the vacuum source. The first end of the vacuum source may engage a seat of the sound attenuating enclosure to provide a cooling air barrier. The seat may define a bottom portion of the pocket. Internal geometries of the sound attenuating enclosure may be shaped to define another air path that does not pass through the vacuum source. A plenum may be attached to the sound attenuating enclosure and define a plenum chamber to collect the warmed cooling air.

A medical drain sensor is provided located in a region of a drain tube which has turbulent or re-circulatory exudate flow. Means are provided in some embodiments to promote or enhance such flow.

A laparoscopic flexible suction/irrigation device of the present invention encases a inner rigid cannula with an outer flexible cannula. Upon translating the distal end of outer flexible cannula beyond the distal end of the inner rigid cannula, the outer flexible cannula returns to a preexisting curvilinear shape. This curved extension can thereafter be positioned via a proximal handle to concavities within the surgical site for precise and effective fluid retraction.