26 results about "Venous access" patented technology

A securement assembly for supporting and stabilizing a vascular access device, such as a tunneled central venous access devices (CVAD) or a surgical drain, is provided herein. The securement assembly may comprise a base and a lid. The base may include a central post about / around which the external portion of the access device or surgical drain may be wrapped. The lid may extend from the base and may be configured to cover the external portion of the access device or surgical drain (when installed). In various embodiments, the base and the lid collectively define an annular chamber around the central post of the base.

The invention relates to the technical field of medical care quality evaluation, and discloses a system for evaluating the maintenance capability of a nurse central venous access. The system comprises a data acquisition module, a behavior coding module, a step decomposition module and a step quantitative evaluation module which are connected in sequence. The data acquisition module synchronously acquires pressure, flow velocity, blood return images and catheter tip ultrasonic image data during maintenance operation. And the behavior coding module performs time sequence alignment and fusion on the multi-modal data to generate an operation sequence with a behavior tag. The step decomposition module automatically decomposes the continuous operation sequence into independent evaluation steps according to standard regulations. And the step quantitative evaluation module scores each step by using the pre-training network, and verifies the logic rationality of step scores through a consistency algorithm. According to the system, full-process and multi-dimensional automatic objective evaluation of the maintenance capability of the central venous catheter is realized, and the problems of high subjectivity and incomplete coverage of traditional manual evaluation are solved.

Implantable grafts, particularly for arteriovenous access that may be punctured by an object such as a needle and, following removal of the object, will reseal the resulting hole to the extent of reducing fluid leakage through the graft at the puncture site to an amount less than would be typical for a conventional graft. More particularly, the grafts comprise three layers; an inner layer of implantable graft material such as ePTFE, a middle layer of self sealing elastomeric material such as silicone, and an outer layer of implantable graft material such as ePTFE. Following manufacture, the tubular form of the three-layer graft is everted to put substantially the entire wall thickness of the elastomeric material layer under circumferential compression.

The invention relates to an arteriovenous access system comprising: - a tubular body (1), - with a slit (2) in the longitudinal direction (3), in relation to the tube shape, which divides the tube body (1) into a left (2a) and a right section (2b) with a symmetry axis (2c) in between, - at least four cutouts (4) in the tube body, of which at least two are arranged in the left section and at least two in the right section, and - a hollow nozzle (5) on the tubular body for connection to a blood vessel, which is connected to the tubular body at an acute angle α of other than 90°, the angle α being measured in the longitudinal direction and • a tube (25) made of mesh, which encloses the nozzle (5) and projects into the tube body (1) through an opening (20), wherein the tube has at least three or four incisions (23) at this projecting end, for opening and applying to the inner wall of the blood vessel, or • which has an outwardly projecting metal ring (24) and has at least three or four incisions (23) at both ends, for insertion into the nozzle (5) until the metal ring (24) stops and for placement against the inner wall of the blood vessel, or • at least three or four flat anchoring elements (21) are attached to the outside of the nozzle (5), which can extend into the interior of the blood vessel through slots between the nozzle (5) and the tubular body (1); and an associated set

Implantable grafts, particularly for arteriovenous access that may be punctured by an object such as a needle and, following removal of the object, will reseal the resulting hole to the extent of reducing fluid leakage through the graft at the puncture site to an amount less than would be typical for a conventional graft. More particularly, the grafts comprise three layers; an inner layer of implantable graft material such as ePTFE, a middle layer of self sealing elastomeric material such as silicone, and an outer layer of implantable graft material such as ePTFE. Following manufacture, the tubular form of the three-layer graft is everted to put substantially the entire wall thickness of the elastomeric material layer under circumferential compression.

The invention relates to a method for evaluating image data for imaging a vascular structure in order to automatically determine at least one arterial and / or venous access location of the vascular structure, an embolism can be carried out at at least one edge location of a pathological change located in a region of the vascular structure, the invention relates to a method for acquiring image data of a catheter, the catheter being able to pass through a vascular structure and from an entry location or one of the entry locations to a corresponding edge location, the method comprising the steps of: obtaining said image data comprising a plurality of image points, when the image data is captured or an original image of the image data is obtained from which image points of the contrast agent flowing through the respective associated positions in the vascular structure are assigned at least one piece of detected time information relating to the point in time at which the contrast agent reaches the respective position, and at least one piece of detected time information relating to the point in time at which the contrast agent flows through the respective associated positions in the vascular structure. And determining at least one artery and / or vein entry location according to the at least one piece of time information.

The invention relates to a new arteriovenous access system which can be used in vessels (arteries, veins and a dialysis shunt). The invention relates to an arteriovenous access system for blood vessels, comprising: - a tube-shaped tubular body (1), - having a slot (2) in the longitudinal direction (3), with respect to the tube shape, which divides the tubular body (1) into a left portion (2a) and a right portion (2b) with an axis of reflection (2c) therebetween; - at least four cutouts (4) in the tubular body, of which at least two are arranged in the left portion and at least two are arranged in the right portion; and - a hollow connecting piece (5) on the tubular body for connection to a blood vessel, the hollow connecting piece being connected to the tubular body at an acute angle (α) not equal to 90°, wherein the angle (α) is measured in the longitudinal direction. The invention also relates to an associated kit having this access system.

The invention relates to a computer-implemented method for evaluating image data (12) depicting a vascular structure (16) for the automated determination of at least one arterial and / or venous access position (17, 18) of the vascular structure (16), wherein embolization at at least one edge position (15) of a pathological change (11) located in the region of the vascular structure (16) can be carried out by advancing a catheter via an access route (19) through the vascular structure (16), which leads from the access position (17, 18) or one of the access positions (17, 18) to the respective edge position (15), wherein the method comprises the following steps: - Obtaining the image data (12) comprising several image points, wherein each of the image points whose respective position in the vascular structure (16) was perfused by a contrast agent administered during or before the acquisition of the image data (12) or of raw images (9, 10) from which the image data (12) are obtained, is assigned at least one recorded time information relating to a time at which the contrast agent reached the respective position, - Determining at least one arterial and / or venous access position (17, 18) based on at least one piece of time information.

The present disclosure relates to inhibition of platelet absorption. Cardiovascular grafts with highly reduced thrombosis are provided. The cardiovascular graft is an electrospun nonwoven web produced from a supramolecular polymer of large diameter fibers. The cardiovascular graft can be implanted in a human body as a vascular graft to allow blood vessel bypass / reconstruction, or repeated venous access for dialysis treatment, as well as other small diameter vascular disorders.

The present disclosure describes systems and methods for blood return in a hemodialysis machine using an adjustable valve that includes a first portion having a first port configured to be connected to a machine arterial line and a second port configured to be connected to a machine venous line, and a second portion of the adjustable valve having an arterial inlet port configured to be connected to a patient arterial access line, a venous outlet port configured to be connected to a patient venous access line, and a substitution inlet port configured to be connected to a substitution fluid line. The first portion can be movable relative to the second portion to selectively connect the first port and the second port with a selected combination of two of the arterial inlet port, the venous outlet port, or the substitution inlet port to adjust a flow of fluid therethrough.

The invention relates to the technical field of medical imaging diagnosis, in particular to a venous access pressure meter. Comprising an equipment main machine and a disposable syringe, and the disposable syringe is installed on the front face of the equipment main machine; the equipment host comprises a shell, a driving and control system arranged in the shell, and a pressure detection system; the self-adaptive injector clamping mechanism, the man-machine interaction interface and the code scanning module are arranged on the front face of the machine shell. According to the venous access pressure meter provided by the invention, through the combination of the driving and control system and the pressure sensor, the injection process is converted into objective data such as accurate flow velocity, dosage and real-time pressure curve, and the difference of human experience is eliminated, so that a unified and quantifiable standard is provided for judging the smoothness of an indwelling needle, and the result is more reliable.

A computer-implemented method for evaluating image data depicting a vascular structure for the purpose of automatically determining at least one arterial and / or venous access position of the vascular structure. An embolization may be carried out at at least one peripheral position of a pathological change in the region of the vascular structure by introducing a catheter via an access path which runs through the vascular structure and leads from the access position or one of the access positions to the respective peripheral position. The method includes obtaining the image data comprising a plurality of image points, wherein those image points through whose respectively associated position in the vascular structure a contrast agent flowed during the recording of the image data, or of raw images from which the image data is derived, are each assigned at least one captured item of time information relating to a time point at which the contrast agent reached the respective position, the contrast agent being administered during or before this recording and determining the at least one arterial and / or venous access position on the basis of the at least one item of time information.

The invention relates to a deep vein transcatheter arteriovenous wall puncture effect-based deep vein transcatheter arteriovenous wall puncture effect-based deep vein transcatheter arteriovenous wall puncture device, and belongs to the technical field of medical surgical instruments, the deep vein transcatheter arteriovenous wall puncture effect-based deep vein transcatheter arteriovenous wall puncture effect-based deep vein transcatheter arteriovenous wall puncture device comprises a guide wire capturing device and a puncture device, one end of the rod body is provided with a guide wire capturing device with the size capable of being released and compressed, and the other end of the rod body is provided with a handle. The puncture device comprises a second long catheter, a puncture tube is arranged in the second long catheter, the puncture tube can linearly move in the second long catheter, and a guide wire is arranged in the puncture tube; the guide wire penetrates out of the puncture tube and is captured through the guide wire capturing device. The arteriovenous access device has the advantages that the guide wire penetrates out of the puncture tube, the guide wire is used for capturing through the guide wire capturing device, and the arteriovenous access of the deep vein transcatheter arteriovenous interventional operation is established.

A system and method for determining a difficult venous access of a patient. Logic processes meta data acquired by a vasculature assessment device coupled with the patient. The meta data, e.g., vessel diameter, vessel depth, vessel wall thickness, vessel wall elasticity, tissue elasticity, tissue profusion, blood flow rate, or hydration level. The logic further determines a difficult venous access by performing an algorithm on the meta data. The algorithm is defined utilizing machine learning techniques applied to an ongoing collection data sets acquired from a plurality of systems across a plurality of patients undergoing catheter insertion events. The data set may also include patient data such as weight, age, etc. The vasculature assessment device may include ultrasound imaging, infrared imaging, molecular imaging, Raman spectroscopy, or optical coherence tomography to acquire one or both of three-dimensional imaging data and the meta data.

An intravenous line component having a body adapted to function as a component (such as a needleless connector) of an intravenous line configured for providing intravenous access, and an interval timer integrated into the body. The interval timer is configured to provide a change in state, such as a visible change in color, after a defined period of time. The defined period of time is selected to correspond to a duration of time after a start time matched to a prescribed time for replacement of the intravenous line component to mitigate a bacterial infection risk, e.g., at 72, 96 and / or 168 hours after use in an active IV line. The interval timer may be configured to change state as a function of a photosensitive, vapor-sensitive, thermosensitive, or other reaction upon exposure to the environment, by mixing of substances, or by contact with fluid passing through the intravenous line.

A blood vessel access system includes a vascular assessment device configured to acquire raw image data of a vasculature of the patient and a system module. The system module can include a console coupled with the vascular assessment device, the console including a processor and a memory having logic stored thereon that, when executed by the processor, performs operations including receiving the raw image data from the vascular assessment device, determining meta data for the vasculature from the raw image data, and applying a trained machine learning model to the meta data to determine a difficult venous access assessment for the vasculature. The blood vessel access system can perform a difficult venous access assessment, including applying a machine learning algorithm to a plurality of historical difficult venous access assessment data sets to train a machine learning model that relates meta data and three dimensional imaging data to corresponding assessments.

The utility model provides a coaxial catheter system for implanting a stent electrode, which comprises an outer tube body, an inner tube body, an inner tube body, an inner tube body, an inner tube body and an outer tube body, and is characterized in that the right end of the outer tube body is connected with an outer tube body tube seat; the right side of the middle tube body is connected with a middle tube body tube seat, and the left end of the middle tube body is connected with the outer tube body tube seat through an outer tube body rotary hemostasis valve; the right end of the inner tube body is connected with an inner tube body tube seat, the left end of the inner tube body is connected with a middle tube body tube seat through a middle tube body rotary hemostasis valve, and the right end of the inner tube body tube seat is connected with an inner tube body rotary hemostasis valve. According to the whole structure, flexibility and strength are balanced, operation performance is improved, strong supporting performance at the near end and excellent passing performance and supporting performance at the far end are achieved, a complex venous access can be safely and effectively navigated, and a support electrode is smoothly fed into the anterior superior sagittal sinus from the jugular vein.

The present disclosure describes systems and methods for blood return in a hemodialysis machine using an adjustable valve that includes a first portion having a first port configured to be connected to a machine arterial line and a second port configured to be connected to a machine venous line, and a second portion of the adjustable valve having an arterial inlet port configured to be connected to a patient arterial access line, a venous outlet port configured to be connected to a patient venous access line, and a substitution inlet port configured to be connected to a substitution fluid line. The first portion can be movable relative to the second portion to selectively connect the first port and the second port with a selected combination of two of the arterial inlet port, the venous outlet port, or the substitution inlet port to adjust a flow of fluid therethrough.

The invention relates to the technical field of medical apparatus and instruments, and discloses a high-pressure injection intelligent sensing and closed-loop control system for preventing extravasation of a contrast agent, which establishes a patient-specific blood vessel baseline model through pre-injection of normal saline to realize accurate adaptation of a personalized safety threshold value. Pipeline hydraulic pressure and skin tissue tension are synchronously collected through a double-node pressure sensor array, extravasation and non-extravasation abnormity are accurately distinguished in combination with a multi-feature fusion algorithm, crossing from post-event passive triggering to pre-event active intervention is achieved through a four-level risk classification pre-judgment mechanism, and when the highest risk level is triggered, the risk level is judged to be higher than the highest risk level. The system synchronously starts the dual-redundancy executing mechanism, the contrast agent is guided to the waste liquid cavity through the three-way valve, reliable blocking is achieved through the synergistic effect of the three-way valve and a physical clamping pipeline of the electric pinch valve, meanwhile, a KVO mode is automatically started, normal saline is continuously infused at the speed of 1-3 ml / h, and a venous access is immediately kept unobstructed at the moment of cutting off infusion of the contrast agent; and the secondary risk of passage blockage after cut-off in the prior art is thoroughly solved.

This invention relates to a dual-lumen arteriovenous fistula puncture device for maintenance hemodialysis and its method of use, aiming to solve the problems of pain during traditional double-needle puncture, difficulty in puncture for patients with poor vascular conditions, and high blood recirculation rate. The device includes an integrated needle hub and a puncture tubing. The tubing contains independent first fluid channels (venous return segment) and second fluid channels (arterial drainage segment). The venous return segment has return side holes on its sidewall, and the arterial drainage segment has multiple axially distributed drainage side holes, with an axial distance of ≥3cm between the two segments. The total area of ​​the drainage side holes is larger than the cross-sectional area of ​​the channel, and the opening directions of the venous and arterial side holes are staggered. This invention achieves dual arterial and venous access through a single puncture. Combined with optimized fluid dynamics design, it significantly reduces the blood recirculation rate (≤5%) and improves the puncture success rate for patients with poor vascular conditions (≥85%), while also offering the advantages of low pain and high dialysis efficiency.

The invention relates to a new arteriovenous access system which can be used in vessels (arteries, veins and a dialysis shunt). The arteriovenous access system for blood vessels is described in detail: - a tubular body (1), - with a slit (2) in the longitudinal direction (3), in relation to the tube shape, which divides the tube body (1) into a left (2a) and a right section (2b) with a symmetry axis (2c) in between, - at least four cutouts (4) in the tube body, of which at least two are arranged in the left section and at least two in the right section, and - a hollow nozzle (5) on the tubular body for connection to a blood vessel, which is connected to the tubular body at an acute angle α of other than 90°, the angle α being measured in the longitudinal direction; and an associated set with this access system.

The present invention provides a blood purification device and a method for priming a blood circulation path, wherein the burden of a medical worker is reduced and the use of a dialysate as a priming liquid is suppressed. A supply port is provided in the dialysate supply passage, and a discharge port is provided in the dialysate discharge passage. A supply passage is branched on the upstream side of the blood pump in the arterial passage, and a venous passage connection part (branch pipe) capable of connecting the venous passage is provided in the supply passage. In a state in which the supply passage is connected to the supply port, the arterial passage is connected to the discharge port, and the venous passage is connected to the branch piping of the supply passage during priming, the dialysate supply means and the blood pump are operated to simultaneously circulate the dialysate to the arterial passage and the venous passage, and the supply port is connected to the discharge port, and the venous passage is connected to the branch piping of the supply passage. A blood circulation path formed by a blood purifier and a blood circuit is pre-charged.

A venous needle dislodgment detection system for use with a blood access device during medical treatment is disclosed, comprising a medical blood access system in communication with a dislodgment sensing apparatus, the medical blood access system having a venous blood line; a first end of the venous blood line being coupled to the medical blood access system at a tubing connection point, and a second end of the venous blood line being coupled to the blood access device; the dislodgment sensing apparatus comprising a sensor positioned adjacent to the venous blood line and proximal to the tubing connection point, the dislodgment sensing apparatus being configured to generate a dislodgment signal in response to detecting a displacement force indicative of a potential dislodgment of the blood access device from the patient; and the medical blood access system being configured to automatically generate an alarm condition in response to receiving the dislodgment signal.

The application discloses an arteriovenous vascular access stenosis detection system based on auscultation acoustic signals and relates to the technical field of vascular access stenosis detection. In the system operation, an auscultation acoustic signal and related parameters are acquired from a patient's body through a cardiac stethoscope, an echocardiogram and a hemodynamic instrument, a data group is acquired, the acquired acoustic signal is preprocessed, features in physiological parameters are extracted, and a stenosis detection index Xzjc is calculated and acquired. The features of the acoustic signal and the physiological parameters are analyzed, the extracted features are used for detecting and positioning the internal information of the artery or vein, the stenosis detection index Xzjc is compared with a preset arteriovenous vascular access width threshold, the clinical evaluation of stenosis is acquired, the detection result and the evaluation report are displayed to the patient and medical staff, the arteriovenous access stenosis detection result is displayed, a report is generated, and the detection process, the evaluation result and the doctor's suggestion are described in detail.

The invention relates to a venous access device and a peripheral venous catheter with flow diverting features. In one embodiment, a venous access device includes a catheter adapter having a proximal end, a distal end, and a sidewall forming a lumen extending between the proximal end and the distal end; a catheter extending from the distal end; a side port extending outwardly from the sidewall of the catheter adapter and in fluid communication with the lumen of the catheter adapter; and a flow diverting feature configured to divert fluid flowing through the side port and into the lumen in a proximal direction. The present disclosure also relates to a peripheral venous catheter with an extension device, which may include one or more flow diverting features for maximizing the amount of irrigation occurring within the catheter adapter. These flow diverting features may minimize the amount of residual blood, drug, or other fluid that may be present within the catheter adapter after the peripheral venous catheter has been flushed through the extension device.