Fluid management systems are disclosed that include software-controlled, electro-mechanical devices used in combination with single-use or multi-use tubing sets. Functions of the fluid management systems can include fluid pressurization, fluid warming, fluid deficit monitoring (including flow-based and weight-based), suction, fluid collection, and fluid evacuation (including indirect-to-drain and direct-to-drain options). The systems can be configured based on the surgical environment (e.g., operating room or physician office) as well as other user needs and/or preferences.

A wound therapy system includes a dressing sealable over a wound and defining a wound space between the dressing and the wound, tubing fluidly communicable with the wound space, and a canister fluidly communicable with the tubing. The canister, the tubing, and the dressing define a sealed space that includes the wound space. The wound therapy system also includes a therapy unit coupled to the canister. The therapy unit includes a sensor configured to measure a pressure in the sealed space, a valve positioned between the sealed space and a surrounding environment and controllable between an open position and a closed position, and a control circuit. The control circuit is configured to control the valve to alternate between the open position and the closed position to allow airflow through the valve, receive measurements from the sensor, and determine a volume of the wound space based on the measurements.

A fluid management system for use in a tissue resection procedure includes a controller. An inflow pump is operated by the controller and configured to provide fluid inflow through a flow path to a site in patient's body. An outflow pump is operated by the controller and configured to provide fluid outflow through a flow path from the site in patient's body. A motor driven resecting device may be provided for resecting tissue at the site. The controller is configured to actuate an inflow pump and an outflow pump in response to various signals and various algorithms are provided to provide malfunction warnings and assure safe operation.

Systems and methods are provided for controlled infusion, effusion, and/or perfusion of biological/biocompatible liquid to and from a body cavity of a subject, and for continuous control of body cavity parameters, for example in neuro-intensive care. Systems and methods may relate to estimating compliance and pressure/volume changes within a body cavity. A bio-liquid replacement system may include a sensor for continuously measuring at least one parameter associated with the cavity, a pump for infusing the liquid into and aspirating the liquid out of the cavity, a processing unit continuously calculating at least one physiological parameter based on the measured parameter, and defining a target parameter slightly offset from the physiological parameter, and a flow controller controlling said pump unit based on the target parameter and the induced offset such that continuous compensatory changes are induced in the liquid volume. The processing unit continuously estimates the body cavity compliance.

Methods and systems for monitoring a waste stream in a surgical procedure. The method includes providing an irrigation fluid to a surgical area. The method may also include removing via a suction line the irrigation fluid and medical waste at the surgical area to generate a fluid stream in the suction line. The method may also be monitoring the fluid stream based on a derivatizing agent to generate a result. The method may also include providing feedback to a user based on the result.

A cartridge for a fluid management system includes a rigid body; a first flexible side sheet attached to a first side of the rigid body such that the first flexible side sheet and the rigid body define a first fluid path; and a second flexible side sheet attached to the second side of the rigid body such that the second flexible side sheet and the rigid body define a second fluid path, wherein the cartridge is configured such that the fluid enters the cartridge at the first fluid path, flows into the second fluid path from the first fluid path, and exits the cartridge at an exit of the second fluid path, and wherein the first and second flexible side sheets are configured to expand and contract to reduce pulsations of fluid moving through the first and second fluid paths.

Example methods, apparatuses, and computer program products for measuring fluid volumes are provided. An example fluid volume measuring assembly includes a first perforated tube, a total fluid volume measuring device, and a non-blood fluid volume measuring device. In some examples, the total fluid volume measuring device includes a membrane sack positioned in the first perforated tube and a first pressure sensor positioned in the membrane sack. In some examples, the non-blood fluid volume measuring device includes a second perforated tube covered by a filter paper and positioned in the first perforated tube and a second pressure sensor positioned in the second perforated tube.

A fluid management system for use in a tissue resection procedure includes a controller. An inflow pump is operated by the controller and configured to provide fluid inflow through a flow path to a site in patient's body. An outflow pump is operated by the controller and configured to provide fluid outflow through a flow path from the site in patient's body. A motor driven resecting device may be provided for resecting tissue at the site. The controller is configured to actuate an inflow pump and an outflow pump in response to various signals and various algorithms are provided to provide malfunction warnings and assure safe operation.