A catheter guide structure is disclosed. Provided are a first guide module provided with an oxygen supply opening, a second guide module connected to the first guide module, and having an internal space that is opened only when the advancement of the catheter into the first guide module is necessary, and a third guide module connected to the second guide module to guide the advancement of the catheter into the first guide module. Accordingly, efficiency is ensured for the process of inserting a catheter in a respiratory system of a patient to suction foreign substances such as sputum present in the respiratory system of the patient assisted by the respirator and the process of removing the catheter such that nursing treatment for the patient can be provided with speed and efficiency. Further, according to the present disclosure, cleaning and sterilization inside and outside the catheter can be performed with ease.

A valve device for a medical fluid line system includes a main body, the main body having a first fluid passage and a second fluid passage, each fluid passage of the first and second fluid passages extending between an inlet side and an outlet side of the main body. The main body has a first wall portion and a second wall portion which are each elastically displaceable, under an effect of fluid pressure, relative to a substantially dimensionally stable web portion of the main body. Each wall portion of the first and second wall portions is arranged on the web portion, forming one of the first and second fluid passages, in such a way that the first fluid passage is substantially uninfluenced by a fluid-pressure-induced deformation of the second wall portion, and the second fluid passage is substantially uninfluenced by a fluid-pressure-induced deformation of the first wall portion.

A drip chamber is described that is used in medical infusion therapy, wherein the drip chamber utilizes valving to control flow of one or more fluids to a patient. The drip chamber includes a body forming a chamber, wherein fluid may enter via two or more flow ports, and an output port, where fluid may exit the chamber. A float controls fluid flow through one or more flow ports into the chamber such that the flow exiting the chamber may be limited to a single fluid or a combination of the fluids entering the chamber. The float is configured to be retained within the chamber, and the float moves within the chamber based on a level of fluid within the chamber. The control characteristics of the float are determinable by attributing specific buoyancy and dimensions to the float.

A valve for use in connection with microfluidic devices includes a safety feature such that flow is controlled even in the case of a loss of power, thus having applications in critical applications such as the precise delivery of drugs overtime. The valve may be used in connection with multiple tubes delivering drugs, and may be used with a pump, such as an electrochemical pump, to provide the force to move the fluids containing drugs for delivery. In certain applications, more than one medicine may be delivered and metered independently using a single pump with multiple reservoirs and valves.

The disclosure relates to the area of medicine and surgery, in particular it pertains to a drainage catheter (100) that comprises a high capacity drain comprising a radiological guide (110a) with a suction mesh (110b), a safety control opening/closing system (160), an internal pneumatic clamping system (140) and/or an external adhesive skin protection system (150). A reservoir for the administration of local anesthetics and antibiotics may be additionally provided. The disclosed catheter system optimizes flow surface, facilitates procedures for handling and removal of drainage, reduces the risk of occlusions, pain, injuries and infections of the surrounding skin and maintains sufficient structural strength to prevent collapses, among others.

A mechanical fluid pressure modification valve, or “MFLP-valve”, is set forth. The MFLP-valve can be actuated upon movement of a movable pressure system member of a medical pressure system reaching a selected position. Additionally, the MFLP-valve can be actuated based on a pressure condition of the system. When the MFLP-valve unseals, a pressure differential between a pressure chamber and a volume outside of the chamber can be relieved. Disengagement of the movable pressure system member from the MFLP-valve can enable the MFLP-valve to re-seal. The MFLP-valve may include a flag that indicates the position of the movable pressure system member. The MFLP-valve may be provided in a diaphragm-type pressure source.

A device for managing fluid is provided. The device includes: a drip chamber including: an inlet; and outlet; a check valve positioned between the inlet and the outlet, the check valve configured for managing fluid flowing between the inlet and the outlet; and an elastic element. The combination of the check valve and the elastic element limits the extent to which the one way valve may be opened by brief transient pressures appearing at the outlet of the drip chamber. This limiting effect improves the accuracy of fluid delivery in setups such as ‘piggyback’ or Secondary Mode infusions of two fluids using a single pump.

A pressure output device (POD) assembly for sensing fluid pressure in a fluid processing system, is provided. This POD assembly includes a shell defining a shell interior, and a movable diaphragm disposed in the shell interior and separating the shell interior into a flow-through chamber and a pressure sensing side. A sensor port is in fluid communication with the pressure sensing side. An inlet port and an outlet port are in fluid communication with the flow-through chamber. The inlet port and the outlet port define an inlet and an outlet, respectively, of a flow-through channel that passes through the flow-through chamber. A boss protrudes from the interior wall of the shell and extends into the flow-through channel to prevent occlusion of flow under different pressure conditions within the flow-through chamber.

A system is described herein that can irrigate a tissue site using negative-pressure. The system may include a tissue interface configured to be placed adjacent to the tissue site, and a sealing member configured to be placed over the tissue interface to form a sealed space. The system may also include a negative-pressure source configured to be fluidly coupled to the sealed space and a fluid source. The system may further include an irrigation valve. The irrigation valve can have a fluid inlet configured to be fluidly coupled to the fluid source. The irrigation valve can also have a fluid outlet configured to be fluidly coupled to the sealed space. The irrigation valve may also include a clamp configured to be actuated by the negative-pressure source to regulate fluid flow from the fluid source through the fluid outlet.

Disclosed embodiments relate to devices and systems for providing both negative-pressure therapy and instillation, In some embodiments, both negative-pressure and instillation may be provided to a tissue site in a low-profile context that may also prevent siphoning of instillation fluid during negative pressure application. For example, a single bridge may include a negative-pressure pathway with supports and an instillation pathway, and the instillation pathway may be configured with respect to the negative-pressure pathway so that at least a portion of the instillation pathway collapses upon application of negative pressure to the negative-pressure pathway. Collapse of at least a portion of the instillation pathway may be sufficient to close the instillation pathway.