48 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.

Provided is a blood purification device. The pre-filling operation before treatment and the blood return operation after treatment are efficiently performed. The present invention is provided with: a liquid supply passage (11), one end of which is connected to a dialysate supply passage (4A) of a dialysate circuit and the other end of which is connected to a venous passage (3A) of a blood circuit; and a supply / discharge passage (12), one end of which is connected to the artery passage (3B) of the blood circuit, and the other end of which is switchably connected to the dialysate supply passage (4A) or the dialysate discharge passage (4B) of the dialysate circuit. In a state in which a circulation path is formed in which the tips of an arterial passage (3B) and a venous passage (3A) are connected to each other during a pre-charging operation, dialysate is supplied to a blood circuit via the feed passage (11), and the feed / discharge passage (12) is connected to the dialysate discharge passage (4B), and in a state in which a circulation path is formed in which the tips of the arterial passage (3B) and the venous passage (3A) are connected to each other, the feed / discharge passage (12) is connected to the dialysate discharge passage (4B). Dialysate is discharged from the dialysate supply path (4A) to the dialysate discharge path (4B) via the supply and discharge path (12) for supplying dialysate to a blood circuit.

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

Apparatus and methods for controlled arterial / venous access are provided. The apparatus and methods may include a lumen anastomosed to a bodily lumen. A lumen clamping means may utilize a clamp manipulator to effectively seal the tubing, and the manipulator may be operated by two fingers. A needle receptor may be utilized, and the receptor may utilize a compressible member to seal tightly against a needle inserted from outside the body, in order ensure secure placement into a channel. The channel may be in liquid communication with the tubing. The manipulator and the needle receptor may be palpable from outside the body.

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.

A method including: introducing a shunt into a vascular system, wherein the shunt includes an inlet aperture in an inlet region and an outlet aperture in an outlet region; positioning the inlet region into an epidural or intervertebral vein; with a stylet, puncturing a wall of the epidural or intervertebral vein, traversing an interstitial space, and puncturing a thecal sac, wherein the stylet includes a wire extending through the shunt; moving the shunt to cause the inlet region to extend through a wall of the epidural or intervertebral vein; moving the shunt to cause the inlet region to extend into an interstitial space; and moving the shunt to cause the inlet region to extend through the thecal sac, such that the inlet region is positioned in an intradural space, and such that the outlet region is positioned in a venous pathway.

The invention discloses a method for detecting a venous access before high-pressure injection of a CT enhanced contrast agent, and relates to the technical field of CT examination. Whether the bearing capacity of the blood vessel of the patient can bear the standard injection speed of the contrast agent or not can be judged through pre-examination, if normal saline exosmosis or pain does not occur in the blood vessel of the patient in the pre-detection process, it is indicated that the blood vessel meets the high-pressure injection condition, and injection can be conducted according to the high-pressure requirement; if liquid exosmosis occurs during pre-detection, the blood vessel does not meet the high-pressure injection condition, and the blood vessel needs to be replaced additionally to ensure the treatment safety of the patient.

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 utility model discloses an enhanced CT (Computed Tomography) examination contrast agent exosmosis real-time detection device, which effectively achieves the purpose of detecting the contrast agent exosmosis phenomenon, and comprises a first protective belt, a detachable second protective belt is arranged in the first protective belt, a connecting belt is arranged between the first protective belt and the second protective belt, and the connecting belt is connected with the first protective belt. The left side and the right side of the connecting belt are respectively connected with an expansion cloth bag used for adjusting wearing tightness, two pressure sensors are arranged on the lower side of the first protective belt, the right side of the first protective belt is fixedly connected with an alarm mechanism, and the lower side of the second protective belt is detachably connected with an application mechanism. The device is simple in structure, ingenious in conception and easy and convenient to operate, the wearing tightness of the device can be effectively adjusted, medical staff can conveniently and rapidly release swelling pressure of a venous access, the function of relieving an affected part in time is added, and an alarm can be given to the exosmosis phenomenon in time.

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 venous access port assembly having a housing base with a discharge stem, a cap, and an interior reservoir. The port assembly is provided with X-ray discernable indicia to identify an attribute of the assembly after its implantation and clearly appear on an X-ray of the patient in a manner informing the radiologist or technologist and the medical practitioner of that particular attribute. The indicia are cuts in a reservoir lining of radiopaque material such as metal where the cuts having narrow slot width are in the form of one or more sets of alphabetical letters such as “CT” in the lining's side wall or bottom wall.

A shower cover kit 10 for preventing water ingress to a surgically implanted line device, such as a central venous access (CVA) and peritoneal dialysis (PD) catheter, comprises a domed cover 20 having

The invention provides an infusion speed automatic adjusting method and system, and relates to the technical field of intelligent medical treatment. The method comprises the following steps: constructing a multi-source data set, extracting high-frequency / low-frequency components of blood pressure, a heart rate variable coefficient and standardized osmotic pressure characteristics, and calculating a vascular injury risk value and a drug metabolism risk value; constructing a model based on the risk value, and generating a theoretical infusion rate range, a drug distribution volume and an elimination rate parameter; matching the peripheral or central venous access according to the theoretical rate upper limit and the photosensitivity threshold, and generating a target instruction; feeding back an actual rate and an access state; and iteratively updating model parameters and optimizing the learning weight based on the difference between the actual rate and the theoretical range and the difference between the pathway state and the vascular compliance. According to the system, through multi-source data fusion, dynamic modeling and closed-loop feedback, real-time adaptation between the infusion rate and patient physiology and drug characteristics is achieved, vascular injury and metabolic risks are reduced, and infusion accuracy and safety are improved.

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.

An introducer tool comprises a housing, a sheath detachably coupled to the housing, and a needle fixed to the housing. The housing may include a guidewire actuating mechanism configured to extend and retract a guidewire fixed to the guidewire actuating mechanism. The sheath may include a handle and, in a first configuration of an introducer tool designed for intravenous introduction of the sheath, may be detachably coupled to the housing. In the first configuration of the introducer tool, the end of the needle may extend past the end of the sheath. A method for venous access including obtaining and using the introducer tool is also disclosed.

The utility model discloses a multifunctional switching device for central venous access blood sampling, which comprises a three-way pipe with a built-in switching valve, the three-way pipe comprises a main pipe and a first branch pipe, one end of the main pipe is a connecting end, the other end of the main pipe is a blood sampling end, and the first branch pipe is arranged on the circumferential surface of the main pipe. The main pipe is switched between the blood sampling end and the first branch pipe through the change-over valve; the connecting end of the main pipe is used for being connected with a venous catheter, a second branch pipe is externally connected to the position, between the connecting end and the change-over valve, of the circumferential face of the main pipe, the second branch pipe is used for injecting pipe washing liquid into the main pipe, and the second branch pipe is provided with a sealing cover. The first branch pipe is used for being connected with an injector, and the injector is used for push-pull mixing of blood in the main pipe; a puncture needle is arranged at the blood sampling end of the main tube and used for being connected into a vacuum blood sampling tube. The device provided by the utility model can effectively improve the blood sampling efficiency of medical staff aiming at a patient needing frequent puncture and blood sampling.

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.

A manifold containing bolus doses of coding or emergency medications. The manifold permits medical personnel to access the medications from a single location, instead of retrieving them separately from various containers. The manifold either stores doses in individual syringes, or stores medications in containers which the doses are retrieved from through the manifold with a single syringe. The manifold is connectable to a venous access line, so the medication can be administered to the patient via the manifold.

A hemostasis aiding device for use at wound sites associated with venous access procedures.