14 results about "Catheters dialysis" patented technology

This utility model discloses a catheter seat assembly and a long-term dialysis catheter. The catheter seat assembly includes a catheter seat, a supporting inner tube, a locking outer tube, and a fixing ring. The catheter seat has a first end and a second end, which are detachably connected to an extension tube and a dialysis main tube, respectively. The supporting inner tube supports the proximal inner wall of the dialysis main tube and is placed inside the second end of the catheter seat. The locking outer tube is sleeved outside the supporting inner tube and wraps around the proximal end of the dialysis main tube, and is connected to the second end of the catheter seat. The fixing ring is sleeved outside the locking outer tube and locks the locking outer tube radially along the dialysis main tube to the proximal end of the dialysis main tube. In this utility model, the catheter seat assembly, through optimized structural design, is detachably connected to the dialysis main tube. When the catheter seat becomes blocked, it can be separated from the dialysis main tube by disassembling the catheter seat assembly, requiring only the replacement of the catheter seat assembly.

This invention belongs to the field of intelligent sensor technology and discloses a method, system, and dialysis catheter for monitoring multimodal blood infections. The method includes: collecting and analyzing pressure and temperature data to obtain pressure time-frequency spectrum and temperature correction matrix; extracting features from the pressure time-frequency spectrum and temperature correction matrix to obtain analytical features, including pressure features, temperature features, and cross features; acquiring synthetic data and clinical data, and combining transfer learning to build a domain adversarial neural network to analyze the real-time analytical features and obtain predicted values ​​of patient infection risk probability and inflammatory factor concentration range; obtaining patient baseline data, and dynamically adjusting the pressure fluctuation tolerance bandwidth and temperature rise slope threshold based on reinforcement learning according to the patient infection risk probability and inflammatory factor concentration range predicted values ​​to generate personalized alarm commands. This invention can provide early warning of infection risk, reduce false alarm rate and false negative rate, and provide an intelligent and personalized solution for early intervention of blood infections.

A dialysis catheter with an elongate body has a distal end defining blood removal and return ports communicating with internal blood removal and return lumens extending through the elongate body. A sensing pathway is disposed in or on the elongate body. A vascular dimension sensor is provided to dynamically measure changes in dimension of the SVC or IVC during dialysis. The sensor communicates with a control system and may be controlled or positioned via the communication pathway of the catheter body. Systems disclosed included integrated closed-loop treatment based on monitored vascular dimension input. Methods included patient optimized treatments incorporating treatment modulation based on dynamic vascular dimension monitoring.

This utility model relates to the field of medical device technology and discloses a dialysis catheter and a dialysis system. The dialysis catheter includes a catheter body. By defining a first lumen and a second lumen on the catheter body, and symmetrically arranging the distal opening trajectory of the first lumen and the distal opening trajectory of the second lumen with respect to the axis of the catheter body, the dialysis catheter can be manufactured by simple cutting. It can use both soft and hard materials, reducing the manufacturing difficulty of the dialysis catheter. Along the axial direction of the catheter body, compared with other positions on the first curve, the distance between the endpoint farthest from the interval and the dialysis device is the shortest, that is, the attraction force is the strongest at this endpoint. On the first curve, along the direction from this endpoint towards the interval, the attraction force gradually decreases until it can no longer attract liquid. This avoids the dialysis liquid that has been dialyzed from mixing with the liquid to be dialyzed in related technologies, which would reduce dialysis efficiency, thereby improving the dialysis efficiency of the dialysis catheter.

The invention belongs to the field of functional medical catheter preparation, and particularly relates to an antibacterial and anticoagulant dialysis catheter with a sodium alginate-graphene oxide coating and a preparation method of the antibacterial and anticoagulant dialysis catheter. The preparation method comprises the following steps: (1) mixing a graphene oxide dispersion liquid with a sodium alginate solution, then adding a water / alcohol mixed solvent, and then carrying out ultrasonic dispersion treatment to obtain a mixed solution; (2) performing plasma pretreatment on the polyurethane dialysis catheter to obtain a pretreated catheter; (3) immersing the pretreated conduit into the mixed solution, and after dip-coating is completed, sequentially standing and drying to obtain a primary gel layer conduit; and (4) immersing the primary gel layer catheter into a cross-linking solution, and then sequentially cleaning, gradient heating and curing. Efficient antibiosis and anticoagulation are achieved through the synergistic effect of materials, the coating is firm in combination and excellent in biocompatibility, the problems of thrombus formation, infection and the like of an existing dialysis catheter can be solved, and the coating is suitable for hemodialysis vascular access.

This utility model relates to the field of medical device technology, and in particular to a pressure-resistant device for hemodialysis catheters. The technical solution is as follows: A pressure-resistant device for hemodialysis catheters includes a dialysis catheter assembly disposed on the top of the epidermal layer, with a pressure-resistant component on one side of the dialysis catheter assembly. The dialysis catheter assembly includes a dialysis main tube, which is fixedly installed on the top of the epidermal layer by the pressure-resistant component. The spring and arc-shaped cover plate provide elastic pressure protection for the dialysis main tube. When external pressure is applied, the spring buffers the pressure, preventing direct compression of the dialysis main tube and reducing the risk of damage or impaired dialysis function due to pressure. The positioning groove and positioning mark ensure accurate installation of the pressure-resistant component on the dialysis main tube, ensuring precise alignment of the components, guaranteeing the stability and reliability of the pressure-resistant effect, and facilitating rapid installation and use of the device.

In examples described herein, a catheter configured to deliver dialysate and extract an effluent fluid from a peritoneal cavity of a patient includes at least two sensors configured and positioned to generate respective signals indicative of one or more parameters related to PD treatment provided to the patient. The sensors can include, for example, a pressure sensor configured to generate a pressure signal indicative of a pressure of a fluid within a lumen of the catheter or external to the catheter and an impedance sensor configured to generate an impedance signal indicative of an impedance of a fluid within the lumen of the catheter or external to the catheter. A parameter related to PD treatment can include, for example, a catheter status or a peritoneal cavity status of the patient.

The utility model discloses a dialysis catheter pipe changing joint, including flow divider, first catheter, second catheter and third catheter, and one end of first catheter and second catheter is communicated with one end of third catheter through flow divider, and the other end of first catheter is provided with the one-way valve for inserting the guide wire, and the other end of second catheter is provided with the second catheter joint for connecting the contrast injector, and third catheter is provided with the third catheter joint for connecting the cut -off mouth of built -in catheter. The dialysis catheter pipe changing joint of the utility model can carry out the contrast and the guide wire implantation in patient's body simultaneously, is convenient for the operation of physician, reduces the operation risk, improves medical safety, can further reduce the catheter infection probability in the pipe changing process, can reduce the blood loss of patient, improves the tolerance of patient operation and postoperative recovery time, also can improve the medical experience of patient, improves the satisfaction of patient.

The utility model relates to the field of medical auxiliary device, concretely relates to a hemodialysis catheter pressure preventing device, including pressure -resistant pipe -guard assembly and flexible joint subassembly, the pressure -resistant pipe -guard assembly be equipped with two pieces of pipe -guard piece and place in two pieces of pipe -guard piece several pieces of elastic pipe -clamp piece, it can clamp dialysis catheter and can prevent dialysis catheter from being extruded and being folded and damaged, two groups of pressure -resistant pipe -guard assembly divide and place in the both ends of flexible joint subassembly and with flexible joint subassembly detachable connection, and flexible joint subassembly is equipped with two pieces of flexible piece, it can wrap dialysis catheter and can prevent dialysis catheter from being extruded and being folded and damaged, and flexible joint subassembly can carry out flexible bending deformation under the action of external force. The utility model utilizes pressure -resistant pipe -guard assembly and flexible joint subassembly to carry out protection to dialysis catheter, can satisfy dialysis catheter in the flat state not being extruded and being folded and damaged, can also satisfy dialysis catheter in the necessary bending state and be protected, thereby can improve the application range of dialysis catheter pressure preventing device.

A peritoneal dialysis catheter fixation device for nephrology, belonging to the field of dialysis catheter fixation technology, addresses the problems of exposed long dialysis catheters dangling and bending arbitrarily, easily leading to tubing distortion and poor drainage. Furthermore, accidental pulling of the tubing can directly transmit this force to the fixation device and the connection between the tubing and the body, potentially causing loosening or even detachment of the tubing from the wound. The invention includes a main body plate and a mounting cover installed on top of the main body plate. A fixing mechanism is installed at one end of the surface of the main body plate. This invention can regulate and manage redundant tubing, eliminating the problems of tubing dangling and bending, effectively avoiding poor drainage and aging damage caused by excessively long and easily twisted tubing, extending the service life of the catheter, reducing the risk of traction due to excessively long tubing, and simultaneously blocking the transmission of pulling force from the drainage tube, preventing direct pulling on the wound when the drainage tube is completely pulled out.

The utility model relates to a kind of dialysis catheter testing device, including test table, simulation blood circulation mechanism and detection mechanism, the upper portion of test table is fixedly installed with catheter fixing frame, the inside of catheter fixing frame is fixedly clamped with dialysis catheter main body, dialysis catheter main body's two inlet end is provided with shunt nozzle, simulation blood circulation mechanism includes liquid storage tank, peristaltic pump, connecting pipe one, connecting pipe two and connecting pipe three.This dialysis catheter testing device, by setting simulation blood circulation mechanism, the circulation flow of human blood in dialysis catheter can be simulated, whether the condition that blood clot, thrombus blockage exists in dialysis catheter can be accurately detected by pressure sensor, flow sensor and ultrasonic detector, the reflux interference situation of dialysis catheter can be effectively detected by pressure valve and flow switch in reflux detection device, the precision and comprehensiveness of detection are improved, reliable means is provided for the quality detection of dialysis catheter.

The application discloses a slow-release antibacterial medical dressing, and relates to the technical field of medical dressings, which comprises a liquid-permeation absorption buffer layer, the top of the liquid-permeation absorption buffer layer is fixedly connected with a slow-release antibacterial drug storage layer, and the top of the slow-release antibacterial drug storage layer is fixedly connected with a medical carrier area; the periphery of the medical carrier area is fixedly connected with low-sensitivity pressure adhesive fixed frames; the slow-release antibacterial medical dressing is provided with a composite structure of a porous carrier and antibacterial microcapsules through the slow-release antibacterial drug storage layer, and after the liquid-permeation absorption buffer layer absorbs wound exudates, the microcapsules are triggered to release at a uniform speed when wet, long-acting slow-release antibacterial effect of not less than 72 hours is realized, a postoperative and catheter high-risk infection window period is covered, one or more easy-to-tear catheter openings are preset on the medical carrier area, and the overall multilayer composite structure is used, so that general covering and fixing of blood dialysis catheters, central venous catheters and various vascular access and surgical incisions can be directly worn out without on-site cutting.

The utility model discloses a simple and easy auxiliary material paste of dialysis catheter binding relates to medical auxiliary material paste technical field, including main plaster, the outer wall of main plaster is fixedly connected with the connecting band, and the one end fixedly connected with fixed paste of connecting band is away from main plaster, and main plaster is used for the binding of catheter head, and fixed paste is used for the binding of connecting seat, and the first viscose layer is installed on main plaster, and the first viscose layer is used for winding after fixing main plaster, and the second viscose layer is installed on fixed paste, and the second viscose layer is used for winding after fixing fixed paste, the utility model discloses, is provided with main plaster, and main plaster can be wrapped catheter head part, and through adopting main plaster to wrap two catheters, compared with using bandage, has saved operation step, and has reduced the workload of medical staff.

This invention relates to the field of medical materials technology, and discloses an anticoagulant and anti-infection coating for dialysis catheters and its preparation method. The preparation method includes: pretreatment of the dialysis catheter substrate, preparation of a bridging layer, preparation of an anticoagulant and antifouling functional layer, preparation of an antibacterial gel outer layer, and post-sterilization treatment of the catheter. This invention achieves integrated antifouling, anticoagulant, and antibacterial properties by constructing a covalently grafted composite layer of poly(2-methacryloyloxyethylphosphorylcholine) and heparin sodium on the surface of the dialysis catheter, and then constructing a pH-responsive interpenetrating hydrogel outer layer loaded with silver nanoparticles and antimicrobial peptides on its exterior. Simultaneously, the antibacterial gel outer layer of this invention forms a chemical network with aldehyde-modified hyaluronic acid and chitosan quaternary ammonium salt through Schiff base bonds, and interpenetrates with the physical temperature-sensitive mesh of poloxamer F127, jointly encapsulating antibacterial components and achieving pH-responsive release of the antibacterial components.