5037results about "Valves" patented technology

An auto-occlusion safety device is provided for use in preventing rupture of infusion components during rapid infusion procedures. An occlusion valve is disclosed having a threshold pressure that is less than a rupture tolerance of the infusion system components. As the fluid pressure of the infusion system increases beyond the threshold pressure of the occlusion valve, the occlusion valve is automatically activated thereby occluding fluid flow upstream from a vulnerable infusion component. An accumulator is further disclosed for use in combination with the safety device to compensate for time delays in full activation of the occlusion valve.

Set forth are vascular valves and servovalves and methods of using the same that may be positioned in the circulatory system without interrupting blood flow to facilitate solid organ transplantation so as to reduce graft organ anoxia and degradation before and after harvesting and storage, thereby minimizing late-term cardiac allograft vasculopathy as a major cause of graft failure. Along the urinary tract, bypassing bladder-generated urge sensation by diverting urine directly from the ureters to a neobladder or collection bag alleviates intractable incontinence, nocturia, urethral syndrome, overactive bladder, dysuria, or frequency. Where the lower tract is missing, a prosthesis can thwart disease and preclude the degenerative metaplastic transition to carcinoma risked when gut is used to construct a conduit for urine, a neobladder, and / or high-maintenance stoma. Druglines to valves and servovalves can directly pipeline-target medication to nidi, anastomoses, or any other trouble spots.

Disclosed herein are fluid control devices for clot treatment systems, and associated systems and methods. In some embodiments, a fluid control device can be coupled between a catheter and a pressure source and configured to selectively allow or prevent a vacuum generated within the pressure source to be applied to a lumen of the catheter. The catheter and the fluid control device can together define a lumen or fluid path to the pressure source. The lumen or fluid path can have an at least generally uniform dimension (e.g., diameter) along its length, which is expected to inhibit or even prevent choke points or other resistances to fluid flow through the fluid control device, including when used with large bore catheters.

An infusion system may include a radioisotope generator that generates a radioactive eluate via elution, a beta detector, a gamma detector, and a controller. The beta detector and the gamma detector may be positioned to measure beta emissions and gamma emissions, respectively, emitted from the radioactive eluate. In some examples, the controller is configured to calibrate the infusion system using the gamma detector. For example, the controller may generate a radioactive eluate and measure the activity of the radioactive eluate using both the beta detector and the gamma detector. The high accuracy of the activity measured by the gamma detector may be used to calibrate the infusion system. In subsequent use, the infusion system calibrated using the gamma detector may adjust measurements made to monitor and / or control patient infusion procedures.

A catheter assembly having a catheter having a proximal end for insertion ingot the body and a distal end, a fluid collection bag arranged to receive fluid from the distal end of the catheter, a sleeve enclosing the catheter along the length of the catheter, and a fluid reservoir arranged at the proximal end. The fluid reservoir is configured to release wetting fluid into the sleeve to wet the catheter and the distal end of the sleeve is in fluid communication with the fluid collection bag. Fluid may flow from the distal end of the catheter into the sleeve or from the distal end of the sleeve into the catheter. An inlet to receive fluid from the distal ends of the sleeve and catheter. The inlet may comprise a one-way valve. There is also provided a packaged catheter assembly comprising a pouch containing the catheter assembly.

A drainage system including a catheter including a sensor, a first valve in fluid communication with an interior of the catheter, a controller communicatively coupled to the sensor, the controller including logic configured to direct opening and closing of the first valve using one or both of an elapsed time and a presence of a predetermined condition, and a venturi pump in fluid communication with the interior of the catheter.

An oral irrigator including a reservoir, a handle in fluid communication with the reservoir, a base in fluid communication with the handle and the reservoir, and a valve assembly. The valve assembly is configured to couple the handle to the base. In a first configuration, the handle valve and base valve are closed to prevent fluid flow out of the handle and the base, respectively, and in a second configuration, the handle valve and the base valve are open to allow fluid to flow between the base and the handle.

Fluid connector assemblies that seal off fluid paths in the respective connectors are disclosed. When connectors of a fluid connector assembly are connected to each other, respective compressible members in the connectors are displaced, allowing downstream fluid passage through the fluid connector assembly. The connectors maintain a connection by a snap mechanism that provides a threshold retention force. When an external force greater than the threshold force is applied to the fluid connector assembly, the snap mechanism may no longer maintain the connectors together, causing the connectors to decouple from each other. Once the connectors are decoupled, a connecting mechanism may be activated preventing the connectors to be coupled together without actuation of the connecting mechanism.

The invention relates to the technical field of medical surgical machinery, and provides a coaxial type interventional instrument delivery system and method.The coaxial type interventional instrument delivery system comprises a telescopic delivery mechanism with a plurality of telescopic sections connected in sequence; the first delivery box assembly is arranged at one end of the telescopic delivery mechanism; the second delivery box assembly is arranged at the other end of the telescopic delivery mechanism; the third delivery box assembly is arranged on one telescopic section of the telescopic delivery mechanism, and the third delivery box assembly is configured to rotate around the axis of the telescopic section and move along the axis of the telescopic section; the telescopic delivery mechanism enables the first delivery cassette assembly to move back and forth relative to the second delivery cassette assembly and the third delivery cassette assembly to deliver or withdraw the interventional instrument. The problem that the tail end of a catheter needs to be pulled out when an existing vascular intervention surgical instrument delivers the middle catheter can be solved, and meanwhile the problem that a middle delivery device used for fixing the middle catheter affects the delivery stroke of a guide wire and a balloon can also be solved.

The present disclosure relates to balloon assemblies designed to permit blood flow through a central perfusion channel, at least when blood flows in a proximally-oriented direction. Such a balloon assembly can include one or more toroid balloons, each defining a cavity that can be independently fed by one or more inflation tubes coupled thereto to inflate the balloon. When the toroid balloons are inflated within a patient lumen or a prosthetic device, such as a prosthetic heart valve, blood is allowed to flow through the perfusion lumen. A balloon assembly can further include a flexible valve configured to regulate blood flow when the balloon assembly is inflated, to allow proximally directed flow through a channel formed in a flexible funnel thereof, and prevent backflow in the opposite direction.

Aspects of the disclosure describe an implantable system for monitoring intracranial pressure (ICP) in a subject, the system comprising: a conduit for the flow of cerebrospinal fluid (CSF); a hermetically sealed compartment; a first pressure sensor configured to measure an absolute ICP and output a measurement, wherein the first pressure sensor is hermetically sealed in the compartment, and wherein the first pressure sensor comprises a surface exposed to the CSF in the conduit; a microcontroller disposed in the hermetically sealed compartment that receives multiple inputs including at least the output of the first pressure sensor; and an accelerometer disposed in the hermetically sealed compartment for monitoring a subject's positional status, and wherein the accelerometer communicates an output to the microcontroller.

Described herein are systems, devices, and methods for methods for autologous blood transfusion. For example, an apparatus may comprise a fluid conduit configured to receive a volume of fluid from a patient and a container fluidically coupled to the fluid conduit. The container may define a reservoir configured to receive the volume of fluid from the fluid conduit. The apparatus may include a vacuum conduit couplable to a vacuum source, a vent configured to vent air into the reservoir, and at least one valve configured to couple the reservoir to the vacuum conduit to generate negative pressure within the reservoir such that the volume of fluid is drawn into the reservoir, and decouple the reservoir from the vacuum conduit while coupling the reservoir to the vent such that air is vented into the reservoir at an average rate that prevents turbulent movement of the volume of fluid within the reservoir.

Fluid connector assemblies that seal off fluid paths in the respective connectors are disclosed. When connectors of a fluid connector assembly are connected to each other, respective compressible members in the connectors are displaced, allowing downstream fluid passage through the fluid connector assembly. The connectors maintain a connection by a snap mechanism that provides a threshold retention force. When an external force greater than the threshold force is applied to the fluid connector assembly, the snap mechanism may no longer maintain the connectors together, causing the connectors to decouple from each other. Once the connectors are decoupled, a connecting mechanism may be activated preventing the connectors to be coupled together without actuation of the connecting mechanism.

Some embodiments relate to a luer connector comprising a housing having a hollow bore therethrough, a first end, and a second end, a male luer tip supported by the housing configured to rotate with respect to the housing, the luer tip having a first open end and a passageway through the luer tip in fluid communication with the first open end, and a substantially rigid internal member extending into the passageway of the luer tip toward the first open end of the luer tip. In some embodiments, at least one of the luer tip and the internal member can be axially moveable between a first closed position and a second open position relative to the other of the luer tip and the internal member. Further, the luer tip and the internal member can cooperate such that rotation of the luer tip in a first direction relative to the housing increases an axial displacement between the first open end of the luer tip and an end portion of the internal member.

The present disclosure provides a device comprising a first connector including a first elongated hollow member configured to be positioned at least partially within a lumen of a proximal portion of a tube. The first connector provides a clamping force to the proximal portion of the tube. The device also includes a second connector configured to be removably coupled to the first connector. The second connector including a second elongated hollow member configured to be positioned at least partially within a lumen of a distal portion of the tube. The proximal portion of the tube is separated from the distal portion of the tube when the first connector is disconnected from the second connector, and the lumen of the proximal portion of the tube is fluidically connected with the lumen of the distal portion of the tube when the first connector is removably coupled to the second connector.

The utility model discloses a closed sputum suction tube, including joint subassembly and sputum suction hose, joint subassembly includes flushing cavity, breathing cavity and sputum collection cavity, breathing cavity is equipped with breathing machine joint for connecting breathing machine pipeline, sputum collection cavity is equipped with the intubation joint for connecting trachea intubation, the sputum suction hose is equipped with the flushing cavity, and the flushing cavity is equipped with the flushing cavity and the sputum collection cavity. The flushing cavity is provided with a first flushing pipe; the sputum suction hose can penetrate through the flushing cavity, the breathing cavity and the sputum collecting cavity to enter the respiratory tract of a patient to suck sputum. The sputum suction hose comprises a sputum suction end and a negative pressure access end, the sputum suction end is used for sucking sputum, and the negative pressure access end is used for being connected with a negative pressure pipeline; the sputum collecting cavity is further provided with a second flushing pipe and a drainage pipe. By adopting the sputum aspirator, sputum coughed by a patient can be collected, the inner wall and the outer wall of the sputum aspiration hose are convenient to clean, the treatment efficiency is improved, and the treatment safety is improved.

The invention relates to the technical field of medical surgical machinery, and provides a vascular interventional surgical robot and a delivery method, the vascular interventional surgical robot comprises: a first telescopic delivery mechanism; the first delivery box assembly is arranged at one end of the first telescopic delivery mechanism; the second delivery box assembly is arranged at the other end of the first telescopic delivery mechanism, and the second delivery box assembly is used for being connected with a blood vessel sheath implanted into a blood vessel in advance so as to deliver an interventional instrument into the blood vessel sheath; wherein the first delivery box assembly and the second delivery box assembly are used for being connected with the interventional instrument, and the first telescopic delivery mechanism can enable the first delivery box assembly to move back and forth relative to the second delivery box assembly so as to deliver or withdraw the interventional instrument. The problem that in the catheter delivery process of an existing vascular intervention surgical robot, a catheter is bent when encountering resistance can be solved.

The utility model discloses an endoscope water-gas switching valve and an endoscope operating handle, wherein the endoscope water-gas switching valve comprises a cylinder, a piston and a switching mechanism; the cylinder is provided with an air inlet nozzle, an air outlet nozzle, a water inlet nozzle and a water outlet nozzle; the air inlet nozzle, the air outlet nozzle and the water inlet nozzle are located on one side of the cylinder and extend obliquely downward, and the water outlet nozzle is arranged on the other side of the cylinder and extends horizontally; a plurality of sealing rings are arranged on the piston, and the plurality of sealing rings separate the inner cavity of the cylinder and the space between the piston into a plurality of independent annular cavities constituting a part of the corresponding fluid channel; the switching mechanism drives the piston to move, so as to realize the connection between the air inlet nozzle and the air outlet nozzle or the connection between the water inlet nozzle and the water outlet nozzle. The air inlet nozzle, the air outlet nozzle and the water inlet nozzle in the endoscope water-gas switching valve of the utility model are all located on the same side of the cylinder, which is conducive to the layout of the water-gas pipeline in the endoscope operating handle, making the water-gas pipeline in the endoscope operating handle more concise.

An embodiment relates to an active implantable medical device (AIMD) comprising: a permeability module to allow ingress of a fluid into an osmotic agent chamber of the AIMD, a compressible piston, a drug chamber comprising a drug or being provided to receive a drug and a valve module to allow flow of the drug from the drug chamber to outside the AIMD through one or more drug outlets present in the AIMD, wherein the AIMD has dimensions that allow the AIMD to be implanted, subcutaneously, in a human body.

A remaining needle water stop clamp is integrally in a C shape and comprises a left portion, a middle portion and a right portion which are sequentially fixed together, a left through hole is formed in the left portion, a right through hole is formed in the right portion, a hose can pass through the left through hole and the right through hole, a guide tube is fixed to the inner wall of the left portion, and the axis of the guide tube coincides with the axis of the left through hole. Compared with the prior art, the hose fixing device has the technical effects that the guide tube is arranged, so that the radial direction of the hose is restrained, the hose can be prevented from deviating, and the hose can be conveniently blocked by the clamping block.

Disclosed herein are embodiments of a wound treatment apparatus with electronic components integrated within a wound dressing. In some embodiments, a wound dressing apparatus can comprise a wound dressing. The wound dressing can comprise an absorbent material, an electronics unit comprising a negative pressure source, the electronics unit integrated within the wound dressing and at least partially encapsulated by a flexible film. The flexible film can comprise a window or aperture configured to permit fluid communication between the absorbent material and the negative pressure source. In some embodiments, a wound dressing apparatus can comprise a wound contact layer, an absorbent layer over the wound contact layer, the absorbent layer comprising one or more apertures, a cover layer configured to cover and form a seal over the wound contact layer and the absorbent layer, and an electronics assembly comprising a negative pressure source. A portion of the cover layer overlying the one or more apertures in the absorbent layer can be configured to be compressed within the aperture in the absorbent layer when negative pressure is applied to the wound dressing apparatus. The compressed cover layer can indicate a level of negative pressure below the cover layer. In some embodiments, the wound dressing apparatus can comprise an indicator material layer and a cover layer configured to cover and form a seal over the wound contact layer and the indicator material layer. The indicator material layer can be configured to protrude relative to a surrounding surface of an upper surface of the wound dressing apparatus when negative pressure is applied to the wound dressing apparatus and the protruding indicator material layer indicates a level of negative pressure below the cover layer.

Disclosed are examples of valve systems and methods of operating the respective valve systems. An example valve system may include a valve body, an inlet component, an outlet component and a valve tube. The valve body may include a first void and a second void. The inlet component may be coupled to the first void and the outlet component may be coupled to the second void. The valve tube may include a side port and may be positioned through the valve body and coupled to the first void, the inlet component, the second void, and the outlet component. Other valve system examples may include including a valve body, a first septum, a second septum, a first piston, a second piston and a tube. The disclosed methods describe the interaction of the respective components of the respective valve system example.

The invention is directed to a hemostasis therapeutic compression system including an apparatus and system to stop bleeding and assist recovery at a wound location. The hemostasis therapeutic compression apparatus includes a bladder having a transparent portion to visualize the bleeding wound location as well as having one side with an interface pressure sufficient to stop bleeding at the wound site, and the wrap has as an elongated tab as part of a hook and loop portion for self-application by the user or patient. The hemostasis therapeutic compression apparatus includes compression not just on the bleeding wound site but alongside the site for increased and faster recovery and less complications. The transparent portion of the bladder may be in the shape of a circle, oval, kidney, elongated kidney, square, rectangle, "U", "C", and other known shapes depending on the size and location of the bleeding wound site on the limb.

The invention provides a multi-way valve group structure and an expectoration system, and relates to the technical field of medical instruments. The multi-way valve group structure comprises a first valve seat, a second valve seat, a valve plate, a fan assembly and a driving assembly, the valve plate is driven by the driving assembly to rotate between the first valve seat and the second valve seat, and switching of airflow among different air channels can be achieved through dynamic angle changes of the valve plate. Therefore, a user can receive positive-pressure airflow, negative-pressure airflow, zero-air-pressure airflow, negative-pressure oscillating airflow, small-amplitude positive-pressure oscillating airflow or large-amplitude positive-pressure oscillating airflow, the response speed of the system can be remarkably increased in the switching process of different airflow states, the sensitivity of the expectoration system is improved, the respiratory tract cleaning efficiency is improved, and the expectoration effect is improved. The expectoration assisting timeliness is ensured.

The invention discloses a ventricular assist system, a flushing method of a medical catheter pump system, consumables and a device, and belongs to the technical field of medical equipment. The ventricular assist system comprises a flushing pump assembly (210), a first three-way valve (220), a second three-way valve (230) and a medical catheter pump (240), a first valve port (221) of the first three-way valve (220) is connected to a first flushing passage driven by the flushing pump assembly (210), and a second valve port (222) of the first three-way valve (220) is connected to a first flushing interface of the medical catheter pump (240); a first valve port (231) of the second three-way valve (230) is connected to a second flushing passage driven by the flushing pump assembly (210), and a second valve port (232) of the second three-way valve (230) is connected to a second flushing interface of the medical catheter pump (240).