682results about "Multi-lumen catheter" patented technology

Rapidly insertable central catheters (“RICCs”), introducers, and insertion devices including combinations and methods thereof are disclosed. For example, a RICC system can include an introducer and a RICC insertion assembly including a RICC assembly disposed in a RICC insertion device. The RICC assembly can include a RICC, an access guidewire, and a splittable casing over a catheter tube of the RICC and the access guidewire forming a longitudinal composite. The RICC insertion device can include a frame and a nose cover forming a split channel that splits away from a through channel of a nose of the frame. The RICC insertion device can be configured for advancing the RICC assembly by rolling the longitudinal composite across roller wheels disposed in the frame. The through channel can be configured for advancing the catheter tube therethrough while the split channel can be configured for both splitting and passing the splittable casing therethrough.

An introducer sheath is described. The introducer sheath may include a tubular body. The tubular body may extend from a distal end toward a proximal end. The tubular body may include a lumen. The lumen may at least partially be defined by a wall. A channel may be disposed within the wall. The channel may be configured to receive a guidewire. The tubular body may include an expandable portion expandable to increase a cross-sectional area of the lumen.

A catheter configured for placement within a bodily lumen, comprises: a catheter sheath defining a first lumen for medical tools; and an exchange segment defining a second lumen for a guidewire. A proximal end of the exchange segment is joined with a distal end of the catheter sheath in a lengthwise direction forming an angle therebetween, such that the second lumen is laterally offset by a distance and angled with respect to the first lumen. When the catheter is placed within a patient's anatomy, the catheter sheath and / or the exchange segment straightens out so that the axis of the second lumen and the axis of the first lumen become substantially parallel to each other. The offset distance between the axes of sheath and exchange segment depends mainly on the diameter of the guidewire to be used, on the diameter of the sheath, and the angle of the junction.

Rapidly insertable central catheters (“RICC”) and methods thereof are disclosed. In an example, a RICC includes a catheter tube, a suture wing disposed over a medial portion of the catheter tube, a hub coupled to a proximal-end portion of the catheter tube, and a number of extension legs extending from the hub. The catheter tube can include a first section in a distal portion of the catheter tube formed of a first polymeric material having a first durometer. The catheter tube can also include a second section proximal of the first section of the catheter tube formed of a second polymeric material having a second durometer less than the first durometer. The catheter tube can have a column strength sufficient to prevent buckling of the catheter tube when inserted into an insertion site and advanced through a vasculature of a patient without use of the Seldinger technique.

Elongate medical devices with an expandable structure including elongated splines and a distal hub. An elongate medical device includes a handle including a control mechanism, a catheter shaft, an expandable structure including elongated splines and a distal hub, wherein each of the elongated splines includes a shape memory material and an interactive element, wherein each of the elongated splines includes a respective spline proximal end and a spline distal end, wherein each of the spline proximal ends is connected to the catheter shaft distal end, and wherein each of the spline distal ends is connected to the distal hub, and a deflection control member connected to the distal hub, wherein the control mechanism is drivingly coupled to the distal hub via the deflection control member and operable to selectively vary a position of the distal hub relative to the catheter shaft distal end to selectively vary an amount of expansion of the expandable structure, wherein a shape of the expandable structure is produced via a combination of the shape memory material and the position of the distal hub relative to the catheter distal end.

The double-cavity cannula comprises a cannula body, the cannula body comprises an outer tube with an opening in the upper end and an inner tube coaxial with the outer tube, the upper end of the outer wall of the cannula body is provided with a connecting part communicated with the cannula body in a matched mode, a plurality of blood guide side holes are formed in the lower portion of the outer wall of the outer tube, and the opening in the lower end of the inner tube is communicated with a blood guide hopper. A blood return assembly is arranged on the inner wall of the outer tube and above the blood guide hopper, a blood flow guide cover is arranged on the inner wall of a blood return opening of the blood return assembly in a matched mode, a balloon capable of being filled and emptied is arranged on the outer wall of the outer tube and above the blood guide side hole, a filling valve is arranged on one side of the outer wall of the connecting part, and the filling valve is communicated with the balloon through a filling pipeline. When blood is guided, the conditions of local blood vessel wall adsorption and unsmooth blood guiding cannot be easily caused by the design of the blood guiding side holes, and the injection effect, blood turbulence and hemolysis risk increase cannot occur during blood return.

The invention provides a multifunctional intelligent anti-thrombus PICC (peripherally inserted central catheter) for tumor chemotherapy, which comprises a catheter body, a catheter tip, a main infusion cavity, a first auxiliary cavity and a second auxiliary cavity, and the first auxiliary cavity and the second auxiliary cavity are arranged around the main infusion cavity to form a spiral structure; a micro pressure sensor array is embedded in the pipe wall of the first auxiliary cavity; a biological impedance measuring electrode pair is embedded in the pipe wall of the second auxiliary cavity; and the micro pressure sensor array, the biological impedance measuring electrode pair, the micro ultrasonic transducer and the temperature sensor are connected with a processor. According to the method, active thrombus prevention is achieved, passive treatment is changed into active prevention through a triple mechanism, and the thrombus occurrence rate is greatly reduced; meanwhile, the tube body is formed by mutually winding, fusing and extruding three independent cavities (a main infusion cavity, a first auxiliary cavity and a second auxiliary cavity) like a DNA double helix (triple helix is provided herein); and the mechanical stimulation and damage to the inner wall of the blood vessel are reduced.

The invention discloses a catheter with real-time monitoring and alarming functions and a catheter system, and relates to the technical field of medical instruments, the catheter comprises a catheter main tube, a balloon, an interface, a pressure sensor and a flow sensor; the drainage tube, the flushing tube and the balloon tube penetrate through the inner space of the catheter handle; the drainage cavity electromagnetic valve is matched with the drainage tube penetrating through the catheter handle and is arranged on the catheter handle; the flushing cavity electromagnetic valve is matched with the flushing pipe penetrating through the catheter handle and is arranged on the catheter handle; the control module is used for judging the current normal urination or abnormal urination of the catheter according to the internal pressure of the bladder and / or the urine flow rate, and if the urination is judged to be normal, the drainage cavity electromagnetic valve is controlled to keep the drainage channel communicated; if it is judged that urination is abnormal, the abnormal type is determined by analyzing the internal pressure of the bladder and / or the urine flow rate, and processing including alarming is carried out according to the abnormal type.

Disclosed herein are drug delivery devices including catheter assemblies, infusion systems, pre-filled syringes, methods of use, combination products, kits of parts, and drug products with parts lists for independent sourcing, for use in the otic administration of a drug product to a subject in need thereof.

The invention discloses a thoracic surgery pulmonary infection effusion drainage device and belongs to the technical field of medical instruments, the thoracic surgery pulmonary infection effusion drainage device comprises a drainage catheter structure, a filtering structure and a connecting assembly, the drainage catheter structure comprises an insertion tube, the two ends of the insertion tube are connected with a fixing tube and a hemispherical end respectively, and a partition plate is arranged in the insertion tube and the fixing tube; a plurality of drainage holes are formed in the end, close to the hemispherical end, of the insertion tube in the circumferential direction, and a medicine feeding hole is formed in the portion, above the drainage holes, of the insertion tube and communicated with the monitoring cavity. By means of the semispherical end and the drainage hole of the drainage catheter structure, lung tissue is prevented from being scratched when thoracic wall puncture is conducted, the lung tissue damage rate can be reduced to be smaller than or equal to 0.5%, drainage, pressure monitoring and drug administration are achieved through the double-cavity structure, one-time puncture is completed, and the pain of a patient is relieved; by arranging the partition plate, the drainage cavity and the monitoring cavity are isolated, liquid medicine is prevented from polluting an effusion sample, and the infection risk is reduced.

The invention relates to the technical field of medical instruments, and provides a self-adaptive double-cavity cannula for pulsatile blood flow, the self-adaptive double-cavity cannula comprises a cannula body and an elastic diaphragm, the elastic diaphragm is arranged in the cannula body along the axial direction of the cannula body, the elastic diaphragm divides the internal cavity of the cannula body into a drainage cavity and a backflow cavity, and the drainage cavity is communicated with the backflow cavity. The far-end drainage opening and the near-end drainage opening are both communicated with the drainage cavity, the backflow opening is communicated with the backflow cavity, and the elastic diaphragm elastically deforms under the action of pulsatile pressure difference between the drainage cavity and the backflow cavity so as to dynamically change the overflowing sectional area of the drainage cavity and the overflowing sectional area of the backflow cavity. Thus, the elastic diaphragm is elastically deformed under the combined action of the blood flow pressure in the drainage cavity and the blood flow pressure in the backflow cavity, the overflowing area of the drainage cavity and the overflowing area of the backflow cavity can be dynamically adjusted in a self-adaptive mode along with the blood flow pulsation period, pulsation type blood flow generated by the heart can be well adapted, and the blood extraction efficiency and the blood infusion efficiency are effectively improved.

The invention discloses a microcatheter capable of dynamically adjusting the angle of a far-end outlet. A microcatheter capable of dynamically adjusting the angle of a far-end outlet comprises a catheter base body, and the catheter base body is provided with a first channel and a second channel which are arranged in the axial direction; the first channel is a fixed cavity channel and is used for guiding a first guide wire to pass through; the second channel comprises a side cavity and an axial guide cavity which are in butt joint and communicated, and an auxiliary moving cavity is formed in the second channel and used for guiding the auxiliary moving cavity to move; one end of the side cavity is butted and communicated with the end part, close to the fixed cavity end, of the axial guide cavity, the other end of the side cavity is an outlet end of the second channel, and a slope-shaped steering guide side wall is arranged on the inner wall of the side cavity; the auxiliary moving cavity is provided with a second guide wire channel for a second guide wire to penetrate through, and the far end of the auxiliary moving cavity is provided with an axially-arranged deformation area. The catheter base body is connected with a traction wire driving mechanism, and the far end of the traction wire is connected with the deformation area of the auxiliary moving cavity. According to the invention, multi-angle composite adjustment is realized.

The invention relates to an indwelling cannula (1) for puncturing a hollow body by means of a puncture needle, wherein the indwelling cannula (1) has a catheter (2) with a vasiform catheter tube (22), in which the puncture needle can be guided longitudinally displaceably. The indwelling cannula (1) has a manually actuable forward feed mechanism (5) by which a relative movement can be generated between the catheter tube (22) and the puncture needle as a result of manual actuation, by which a puncture tip (31), protruding from the catheter tube (22) at the near-patient end, of the puncture needle can be received in the catheter tube (22). Preferably, at least one operating element of the forward feed mechanism (5) is configured as a pivotably mounted lever (53) with at least one lever arm.

The application provides a multifunctional catheter, comprising a catheter main body and a distal tube with a multi-cavity tube structure. The distal tube comprises a soft end at the proximal end and a functional end at the distal end. The catheter main body and the soft end are provided with a working cavity and a lens cavity. The functional end is further provided with a through hole communicating with the lens cavity. The lens cavity is a circular tube cavity structure extending along the catheter main body and the soft end. The inner wall of the lens cavity is provided with a plurality of accommodation grooves for accommodating photosensitive chips in a lens assembly. The catheter provided by the application can form a space for accommodating photosensitive chips through the plurality of accommodation grooves in the lens cavity, and the lens assembly can be installed without increasing the diameter of the lens cavity, thereby reducing the overall diameter of the catheter to adapt to the more complex bile duct environment relative to the digestive tract.

A hemostasis valve may be used with a catheter such as an aspiration catheter. The hemostasis valve comprises a support, and at least a first lever, pivotably carried with respect to the support. A collapsible tubular sidewall defining a valve lumen is carried by the support. A filament is formed into a loop around the tubular sidewall, the filament having at least a first tail portion extending away from the loop to the first lever. A first spring may be configured to move the first lever in a direction that pulls the first tail portion away from the tubular sidewall, reducing the diameter of the valve lumen in response to reducing the diameter of the loop. A second tail portion may extend away from the loop to a second lever. Each tail portion may be attached to its respective lever, or may be slidably advanceable around a fulcrum on the lever and attached with respect to the support.

The cyclical suction system generates an intermittent cyclically spaced cyclical suction pressure waveform of a vacuum pressure below atmospheric pressure and a positive pressure above the vacuum pressure. The system includes a flexible inlet tubing connected in fluid communication between a vacuum pump and a suction conduit. A positive pressure pulse generator mechanism intermittently cyclically applies an external force that compresses the segments of the flexible inlet tubing, thereby reducing the internal volume and displacing fluid that can be collected therein, thereby generating positive pressure pulses. Upon withdrawal of the applied external force, the flexible inlet tubing is configured to be able to be forced to return to an uncompressed state, thereby increasing the internal volume while reducing pressure therein until the vacuum pressure ultimately regenerates, thereby minimizing return time and maximizing cycle frequency.

A delivery system, method, and related device for facilitating the delivery and deployment of a cardiac implant. Such delivery systems and methods include the use of a pair of magnetic catheters, including an anchor delivery catheter carrying an anchor, which can be stacked with or axially offset from the magnetic head. Such systems further include the use of a puncture guidewire advanceable through the magnetic head of the anchor delivery catheter to establish access to the heart cavity, the puncture guidewire attached to a bridge element such that continued advancement of the guidewire draws the bridge element attached to the first anchor across the heart cavity while the bridge element remains covered by the magnetically coupled catheter. The methods and devices herein also enable cutting and removal of the bridge element of a deployed cardiac implant.

Elongate medical devices with an expandable structure including elongated splines and a distal hub. An elongate medical device includes a handle including a control mechanism, a catheter shaft, and an expandable structure including elongated splines and a distal hub. Each of the elongated splines includes a shape memory material and an interactive element. Each of the elongated splines includes a respective spline proximal end and a spline distal end. Each of the spline proximal ends is connected to the catheter shaft distal end. Each of the spline distal ends is connected to the distal hub. A deflection control member is connected to the distal hub. The control mechanism is drivingly coupled to the distal hub via the deflection control member and operable to selectively vary a position of the distal hub relative to the catheter shaft distal end to selectively vary an amount of expansion of the expandable structure.

A catheter and method for the treatment of a patient having atrial flutter or other arrhythmia comprises an elongated catheter body having an outer wall, proximal and distal ends, and at least one lumen extending therethrough. Further it has a distal tip section comprising a flexible tubing having a proximal end and a distal end and a plurality of lumens extending therethrough. The proximal end of the tip section is fixedly attached to the distal end of the catheter body. The tip section further comprises a nitinol tube having slots formed therein which causes the distal tip section to deflect using the same puller-wire action used to cause the deflectable catheter to deflect at a point proximal to the distal tip section.

The present application provides a fixing-locking structure, including an inner cylinder body, a chuck and an outer cylinder body that sleeve a catheter. A first end of the outer cylinder body is provided with a first chamber to accommodate the chuck. A first end of the inner cylinder body is connected to the first end of the outer cylinder body. One end of the chuck abuts against an inner wall of the first end of the inner cylinder body, and the other end of the chuck abuts against an inner wall of the outer cylinder body corresponding to the first chamber. A clamping part is arranged at each of two ends of the chuck, and a compressing-fitting part is formed at a position where each of the inner cylinder body and the outer cylinder body abuts against the clamping part. The compressing-fitting part compresses the clamping part to contract inwards.

A retrograde delivery catheter includes at its distal end an expandable member configured to at least partially occlude the coronary sinus of a patient's heart, and has a length and variable stiffness that allows the distal end to be selectively articulated so as to be positioned in the coronary sinus. The delivery catheter has a triple lumen construction with a primary lumen extending between the proximal and distal ends and configured to allow a cardioplegic fluid to be delivered to the coronary sinus. A second lumen provides for balloon inflation while a third lumen allows monitoring of a pressure within the coronary sinus. A torque may be applied and a reinforcement member within the delivery catheter provides improved torque transmission along the length of the catheter.

A valve actuator that moves in a catheter assembly between a first position where a valve is closed and a second position where the valve is open, the valve actuator including a shaft portion at a distal end of the valve actuator that is configured to pierce the valve, a mating portion at a proximal end of the valve actuator that is configured to engage a Luer device, a diameter reduction region that connects the shaft portion and the mating portion, and a plurality of windows that extend through the valve actuator for flushing fluid, the plurality of windows being disposed in the diameter reduction region, wherein each of the plurality of windows does not extend a full length of the diameter reduction region.

The present disclosure relates to catheters (102) and methods for removal of kidney stones. The catheter comprises a handle portion (200), a tube portion including a vacuum lumen (114) through which a kidney stone can be removed and an irrigation lumen (116) through which an irrigation fluid can be supplied, a nozzle (150, 152) comprising a distal facing wall having a plurality of irrigation ports (136) in fluid communication with the irrigation lumen (134), and a plurality of pull wires (230) to cause a distal section of the tube portion to bend in one or more directions. Each of the irrigation ports (136) opens in both a distal-facing and lateral-facing direction.

A device for removing stones and foreign bodies from a human cavity including a straight sheath with one or more side branches; said straight sheath including a proximal tube and distal tube with respect to the operator who is holding the device; one or more side branches arise from the proximal tube and said branch or branches share a common lumen with the proximal and distal tubes; at the least, one of the side branches contains a pressure vent in the form of an opening that extends through the wall of the side branch and is sealed to form an airtight channel that extends toward a sealing element assembly. One or more openings at the end of this airtight channel serve as a transposed pressure regulating mechanism and are located and accessible on or near the surface of said sealing element assembly; an operator can regulate the aspiration pressure by covering or uncovering the vent or a portion of the vent.

The disclosed invention is in the field of medical devices, namely angioplasty balloon catheters. The embodiments provide an angioplasty balloon catheter that has favorable features of both biaxial and coaxial lumen configurations, such as pushability, torque, and trackability, enabled by a transition between a biaxial catheter segment and a coaxial catheter segment. In an exemplary embodiment a biaxial-coaxial lumen configuration facilitates injection of fluids through the catheter and out of the catheter proximal to its distal tip end with a guidewire in place in the catheter.

The novel pelvic and abdominal cavity drainage tube comprises a main pipeline, the main pipeline comprises a suction section and a drainage section which are connected with each other, a through suction channel is formed in the suction section in the length direction, a main channel and a plurality of auxiliary channels are formed in the drainage section in the circumferential direction, and the main channel and the auxiliary channels are through in the length direction of the suction section; the projection area of the main channel is larger than that of the auxiliary channel, and strip-shaped openings are formed in the side walls, corresponding to the drainage section, of the main channel and the auxiliary channel. The auxiliary pipeline is circumferentially provided with a plurality of drainage grooves, the outer wall of the drainage section is provided with a connecting hole corresponding to the main channel, one end of the auxiliary pipeline is inserted into the main channel along the connecting hole to enable the drainage grooves to be communicated with the main channel, drainage of the groove area of the tissue part is achieved through the auxiliary pipeline, and therefore the overall drainage range of the drainage tube is enlarged; a better drainage effect is obtained; the overall size can be reduced through connection of the auxiliary pipeline and the main channel, and therefore the wound size of the human body is reduced.

The medical device is provided with: a first tube having a melting point of a first temperature; a second tube having a melting point of a second temperature, which is different from the first temperature, and whose distal end is positioned further toward a proximal end side than a proximal end of the first tube; and a connection member having a melting point of a third temperature, which is higher than the lower of the first temperature and the second temperature. The connection member is in contact with each of the first tube and the second tube, and indirectly connects the first tube and the second tube while maintaining a separation between the proximal end of the first tube and the distal end of the second tube. The connection member provides a continuous path between the first tube and the second tube.

The application provides a balloon detection device, a balloon detection method, a device and medical equipment, and belongs to the field of medical equipment. The balloon detection device comprises a balloon, a first pressure sensor, a balloon control component and a state detection component. The balloon is configured to block a first pipe body in a filling state. The first pressure sensor is arranged inside the balloon. The balloon control component is configured to perform filling or discharge operation on the balloon. The state detection component is used to output whether the balloon is damaged based on the working state of the balloon control component and the detection result of the first pressure sensor. Based on the detection result of the first pressure sensor under different working states, each working state of the balloon control component can be monitored in real time, so as to reduce the risk of accidents caused by leakage or rupture of the balloon during use to a certain extent.

A medical device includes a sheath assembly (1000), a catheter assembly (2000) and an expandable assembly (3000). The catheter assembly (2000) is partially disposed inside the sheath assembly (1000) and includes a first tubular body (2100) axially movable relative to the sheath assembly (1000). The expandable assembly (3000) is sleeved over an outer circumferential surface of a distal end of the first tubular body (2100), and the outer surface of the expandable assembly (3000) is configured for loading a drug. The medical device is configured so that axial movement of the first tubular body (2100) relative to the sheath assembly (1000) causes the expandable assembly (3000) to be in a radially collapsed configuration in which it is confined within the sheath assembly (1000), or in a radially expanded configuration in which it is at least partially exposed outside the sheath assembly (1000). When in the radially expanded configuration, the expandable assembly (3000) comprises a first fluid passage (3001) axially extending therethrough. The medical device can treat atherosclerosis, does not block the blood flow, can prolong the treatment time, and has a good treatment effect.