87 results about "Vascular channel" patented technology

A vascular access device (VAD) monitoring system includes a VAD with a catheter tube that is subcutaneously disposed and incorporates a fluorescent dye. An optical imaging system is also provided, comprising a light source emitting infrared (IR) excitation light and a camera capable of detecting signal light emitted by the fluorescent dye upon exposure to the excitation light. This enables real-time monitoring of the VAD, allowing for the detection of any potential complications or issues related to the vascular access device. The combination of the catheter tube with the fluorescent dye and the optical imaging system provides a non-invasive and efficient means of monitoring the VAD, enhancing patient safety and improving overall healthcare outcomes.

The invention provides a micro-fluidic chip, a model for realizing accurate positioning of an organoid and sequential interaction of a tumor microenvironment, and a construction method of the model. The micro-fluidic chip comprises a chip main body and a chip bottom plate, a blood vessel channel, a central channel, a neural immune cell channel and a culture medium channel are sequentially arranged on the lower surface of the chip main body; the chip bottom plate is arranged on the lower surface of the chip main body and seals each channel; one side of the blood vessel channel is communicated with one side of the central channel, the other side of the central channel is communicated with one side of the neural immune cell channel, and the other side of the neural immune cell channel is communicated with one side of the culture medium channel; the upper surface of the chip main body is provided with an open hole, and the open hole penetrates through the chip main body and is communicated with the middle position of the central channel. According to the model manufactured by the micro-fluidic chip, accurate positioning of tumor organs can be realized through combination of an automatic positioning device and physical constraint, and multi-dimensional cell interaction is supported by dynamic environment regulation and control.

The invention discloses a bone organ chip loaded with a microelectrode array and a use method, and relates to the technical field of organ chips, the bone organ chip is made of a polydimethylsiloxane material, and the bone organ chip comprises a three-layer structure: a top layer, a middle layer and a bottom layer; the middle layer comprises two blood vessel micro-channels, two osteoblast micro-channels and a neuron micro-channel, the channels are separated through columns and micro-columns, and cell interaction in a bone micro-environment is simulated; a microelectrode array is arranged on the top layer and is used for monitoring electrical activity of neurons in real time; the bottom layer is provided with a pneumatic valve which can control opening and closing of the micro-channel. According to the invention, nerve and blood vessel channels are introduced, a nerve-blood vessel-immunoregulation bone microenvironment is constructed, physiological processes such as osteogenesis-blood vessel formation coupling and the like are embodied, intervals of different sizes can enhance intercellular crosstalk and allow blood vessels and neuron axons to selectively pass through, so that the chip can simulate a complex microenvironment of bone tissues, and the microenvironment of the bone tissues can be simulated; and an efficient and accurate in-vitro model is provided for bone disease mechanism research and drug development.

Valve assemblies having improved ability to selectively control flow of fluids through the catheter and prevent leakage of fluids from the proximal end of a catheter that is positioned within a patient. Such improved catheter valve assemblies also prevent leakage of fluids after repeated insertion and removal of medical instruments through the valve.

Systems and methods are adapted for treating the carotid artery. The systems include interventional catheters and blood vessel access devices that are adapted for transcervical insertion into the carotid artery. Embodiments of the systems and methods can be used in combination with embolic protection systems including blood flow reversal mechanisms, arterial filters, and arterial occlusion devices.

The invention discloses a vascularized skin chip, a vascularized skin model and application of the vascularized skin chip and the vascularized skin model. The material of the vascularized skin chip does not contain polydimethylsiloxane; the vascularized skin chip comprises a dermal culture chip layer and an epidermal culture chip layer from bottom to top, wherein a vertically through culture cavity is formed between the dermal culture chip layer and the epidermal culture chip layer; the dermal culture chip layer is provided with a capillary channel, and the capillary channel is used for constructing a capillary in the dermal layer. According to the vascularized skin chip, dermis and epidermis can make direct contact, interaction between cells is truly simulated, the activity and functions of the cells are kept, good mechanical support is provided for the epidermis and the dermis layer, and cell growth and tissue form maturation are promoted. The microvessel channel can simulate microvessels of a corium layer and is used for simulating supply of nutrient substances and excretion of metabolic waste, a dynamic fluid environment is provided, and the skin structure and the microenvironment are restored more truly.

Systems and methods are adapted for treating the carotid artery. The systems include interventional catheters and blood vessel access devices that are adapted for transcervical insertion into the carotid artery. Embodiments of the systems and methods can be used in combination with embolic protection systems including blood flow reversal mechanisms, arterial filters, and arterial occlusion devices.

The invention relates to a tissue engineering trachea, which combines an additive manufacturing technology with a biological material, simulates the form and the function of a natural gas pipe, designs a cartilage-fiber alternating ring structure and a bionic fiber band structure, and designs a unique blood supply channel in a fiber section. The trachea fiber section is composed of hydrogel with a hierarchical porous structure, and a circumferential blood vessel channel and a radial blood vessel pore channel are designed in the hydrogel so as to promote ingrowth and growth of new blood vessels and optimize the blood supply reconstruction process. The tracheal cartilage section is made into a C-shaped cartilage ring with cartilage cells through a biological printing technology, and necessary mechanical support is provided. The fiber segment and the cartilage segment are effectively integrated through chemical bonds of functional groups to ensure stable connection of the two. Partitioned construction of fibers and cartilage is achieved through the biological 3D printing technology, the bionic tissue engineering trachea is formed in a modular construction-integrated assembly mode, it is verified that repairing and reconstruction of multiple types of tissue bionic tracheas can be achieved, and an innovative solution is provided for tracheal injuries.

The invention belongs to the technical field of organ chips, provides an in-vitro brain lymphatic system chip construction method and a brain lymphatic system chip, and makes up the blank of brain lymphatic system in-vitro model construction. The method comprises the following steps: firstly, carrying out flushing treatment, disinfection and sterilization treatment, rinsing treatment and cell culture on a micro-fluidic channel in the chip; then, in the treated micro-fluidic channel, blood vessel channel cell inoculation and brain parenchyma channel cell inoculation are carried out; and finally, in the blood vessel channel, perfusion is carried out once at a preset flow speed every preset duration, shear force stimulation simulating pulse type blood flow is provided, basic formation of in-vitro cerebral vessels is achieved after continuous perfusion, perfusion is carried out once at a preset flow speed every preset duration, shear force stimulation simulating pulse type blood flow is provided, and in-vitro cerebral vessels are formed. Intermittent liquid flow simulating arterial fluctuation is achieved.

The indwelling needle suite comprises a catheter assembly, a puncture assembly and a negative pressure assembly, and the catheter assembly comprises a catheter base, a catheter connected with the catheter base and an isolation plug arranged in the catheter base; the puncture assembly comprises a needle seat and a needle tube connected with the needle seat, the needle seat is provided with a first end and a second end, the first end of the needle seat is detachably connected with the catheter seat, and a needle tip of the needle tube penetrates through the first end of the needle seat and the isolation plug and penetrates out of the catheter; the negative pressure assembly comprises a negative pressure generator and a channel connection switch, the negative pressure generator is provided with a volume-variable inner cavity, and the channel connection switch is arranged between the negative pressure generator and the needle seat and can be used for communicating or blocking the inner cavity of the needle seat and the inner cavity of the negative pressure generator. The indwelling needle suite can conveniently and rapidly build puncture negative pressure and observe blood return, can automatically reduce the negative pressure to prevent injury after blood return, and is especially suitable for first aid and rapid building of a blood vessel channel for administration when the blood vessel condition is poor.

[Problem] To provide a catheter for image acquisition, of which the passage through blood vessels is improved by shortening the length of a hard region of a tip end portion. [Solution] A catheter for image acquisition comprising: an inner tube 10; a sensor unit 30 disposed on a tip end portion of the inner tube 10, and including a plurality of transducers 32a for transmitting and receiving ultrasonic waves in a biological lumen, the plurality of transducers 32a being arranged in a ring shape in the circumferential direction; a plurality of signal lines 50 connected to the respective transducers 32a and enabling transmission of electric signals to and from an external device 300; an outer tube 20 disposed so as to define a second lumen 21 that allows the plurality of signal lines 50 to be inserted therethrough and cover the inner tube 10 at a position closer to the base end than the sensor unit 30; and a joint member 40 joining the sensor unit 30 to the inner tube 10 and the outer tube 20, wherein the joint member 40 is formed of a resin joining agent.

Techniques and technologies for vascular access devices having curvature for improved introduction of catheters into vasculatures are disclosed. A representative vascular access device includes a curved introducer having a shaft that includes a tip configured to penetrate at least a proximal wall of a blood vessel of a patient. The shaft may have a straight section and a curved section disposed between the straight section and the tip. The curved section may be configured to provide a curvature between the straight section and the tip such that a tip longitudinal axis that extends from the tip forms an introducer angle with a straight longitudinal axis of the straight section. The introducer angle may be configured to at least partially reduce contact by the tip and catheter with a distal wall of the blood vessel after the tip has been inserted through the proximal wall of the blood vessel.

The present disclosure relates to an interventional device for implanting an electrode into the brain through a blood vessel, the blood vessel having a blood vessel channel and a blood vessel wall, characterized in that the interventional device comprises: a first guide, the distal end of which is movable distally within the blood vessel channel and establishes a first support point within the blood vessel channel; a second guide, the distal end of the second guide being movable distally through the first guide in the vascular channel and establishing a second support point in the vascular channel such that the second guide extends in an arcuate manner between the first support point and the second support point; the puncture suite is used for carrying an electrode, and the far end of the puncture suite can penetrate through the first guiding piece to move towards the far side in the blood vessel channel and pierce the blood vessel wall in a target puncture area between the first supporting point and the second supporting point, so that the carried electrode is implanted into the brain. Furthermore, the present disclosure relates to a medical device.

The invention discloses a three-channel bionic bone organ chip and a method thereof.The three-channel bionic bone organ chip comprises a three-channel model and a carrier, the three-channel model comprises a blood vessel channel in the middle and bone channels located on the two sides of the blood vessel channel, the width of the blood vessel channel is 500 micrometers, the width of the bone channels is 1000 micrometers, and the width of the carrier is 100 micrometers. The two sides of the blood vessel channel are separated from the bone channels on the two sides through long barriers respectively. The carrier is used for bearing the three-channel model. According to the invention, a novel bone organ chip (Bone Orga-on-a-Chip, BOC) is constructed, which is convenient for simulating an OP microenvironment induced by glucocorticoid and the influence of mechanical mechanics on treatment of OP by MSCs. On the basis, a candidate gene TPD52L1 is further analyzed and screened through bioinformatics, the candidate gene TPD52L1 is remarkably up-regulated in MSCs induced osteogenic differentiation, and the effect of the gene in MSCs osteogenic adipogenic fate choice is discussed.

This invention relates to the field of microfluidic chip technology, specifically to a dynamic microfluidic chip device, its preparation method, and its applications for studying CAR-T therapy for gliomas. The preparation method includes: fabrication of the microfluidic chip; reconstruction of neural tissue; reconstruction of the blood-brain barrier; and simulation of the glioma microenvironment. The dynamic microfluidic chip device includes a microfluidic chip; the microfluidic chip includes, from left to right, a vascular channel, a brain parenchyma channel, a tumor channel, and a subarachnoid channel; each of the vascular channel, brain parenchyma channel, tumor channel, and subarachnoid channel includes a cell culture chamber with an inlet on one side; the cell culture chambers of the vascular channel and the subarachnoid channel have corresponding outlets on the other side. The applications include: CAR-T cell infusion; observation of transmembrane migration; and detection of biomarkers. This invention, through the dynamic microfluidic chip device, its preparation method, and its applications, aims to achieve more accurate in vitro evaluation of CAR-T cell therapy.

The present disclosure relates to an interventional device for implanting an electrode into the brain via a blood vessel, the blood vessel having a blood vessel channel and a blood vessel wall, characterized in that the interventional device comprises: a first guide member, the distal end of which can move distally in the blood vessel channel and establish a first support point in the blood vessel channel; a second guide member, the distal end of which can pass through the first guide member to move distally in the blood vessel channel and establish a second support point in the blood vessel channel, so that the second guide member extends in an arc shape between the first support point and the second support point; and a puncture kit, the puncture kit being used to carry the electrode, and the distal end of the puncture kit being able to pass through the first guide member to move distally in the blood vessel channel and puncture the blood vessel wall in a target puncture area between the first support point and the second support point, thereby implanting the carried electrode into the brain. Furthermore, the present disclosure relates to a medical apparatus.

Disclosed are implantable devices, systems, and methods of fabricating, testing, optimizing, and / or implanting such devices. An implantable device includes a body, a first intrinsic channel network formed in the body and configured to receive cells, and a second intrinsic channel network formed in the body and configured to allow for active flow of a fluid to support viability and / or function of the cells in the first intrinsic channel network. The first intrinsic channel network comprises a first channel and the second intrinsic channel network comprises a second channel, with at least segments of the first and second channels parallel to and spaced apart from each other. Cells may be suspended in a collagen matrix and introduced to the first intrinsic channel network.

Techniques and technologies for vascular access devices having curvature for improved introduction of catheters into vasculatures are disclosed. A representative vascular access device includes a curved introducer having a shaft that includes a tip configured to penetrate at least a proximal wall of a blood vessel of a patient. The shaft may have a straight section and a curved section disposed between the straight section and the tip. The curved section may be configured to provide a curvature between the straight section and the tip such that a tip longitudinal axis that extends from the tip forms an introducer angle with a straight longitudinal axis of the straight section. The introducer angle may be configured to at least partially reduce contact by the tip and catheter with a distal wall of the blood vessel after the tip has been inserted through the proximal wall of the blood vessel.

A flush syringe with a syringe coupler facilitates twice dispensing of intravenous flushing solution to a patient's vascular access device (VAD), with reduced risk of VAD infection. The syringe coupler incorporates a female, first Luer connector on its proximal end that is removably coupled to the male, barrel Luer connector of the syringe, isolating the latter connector from external contamination. The syringe coupler also has a single-use, male, second Luer connector on its distal end of the housing that is adapted for coupled insertion into the patient's VAD, for delivery of at least a portion of the flushing solution retained within the syringe. After the first delivery, the syringe coupler is de-coupled from both the VAD and the syringe. Thereafter, the syringe's unused, sterile, male, barrel Luer connector is directly coupled to the VAD for dispensing the second portion of the flushing solution.

The present disclosure relates to an interventional device for implanting an electrode into a brain through a blood vessel having a blood vessel passage and a blood vessel wall, characterized in that the interventional device comprises: a first guide, a distal end of which is movable distally within the blood vessel passage and establishes a first support point in the blood vessel passage; a second guide, a distal end of which is movable distally within the blood vessel passage through the first guide and establishes a second support point in the blood vessel passage, such that the second guide extends arcuately between the first support point and the second support point; and a puncture set for carrying the electrode, and a distal end of which is movable distally within the blood vessel passage through the first guide and punctures the blood vessel wall in a target puncture region between the first support point and the second support point, thereby implanting the carried electrode into the brain. Furthermore, the present disclosure relates to a medical device.

An ECM-embedded vascular channel-on-a-chip includes an outer case having an internal chamber, an ECM provided within the chamber, the ECM having a cross-sectionally rounded vascular channel having a first end and a second end opposite the first end, wherein an immer surface of the channel is lined with barrier-forming endothelial cells, and an inlet conduit coupled to the first end of the channel through a first side of the outer casc and an outlet conduit coupled to the second end of the channel through a second side of the outer case. Also, an airway-on-a-chip includes an airway lumen including a porous membrane, wherein mucociliated airway epithelial cells are provided on the porous membrane. The airway-on-a-chip has an ECM with embedded stromal cells. The ECM has a cross-sectionally rounded vascular channel, and the inner surface of the channel is lined with barrier-forming endothelial cells.

Techniques for vascular access identification and validation are disclosed. The techniques include: directly or indirectly acquiring an acquired value for a parameter that is a function of oxygen saturation (SO2) of a sample of blood in or obtained from a vascular access device (VAD) disposed in a subject; performing an evaluation of the acquired value at least by comparing the acquired value with one or more reference values; and responsive to the evaluation of the acquired value, assigning an identity classification to the VAD, wherein the identity classification is one of a central venous catheter (CVC), an arteriovenous access device (AVA), or another class of VAD.

The present disclosure relates to an interventional device for implanting an electrode into the brain via a blood vessel, the blood vessel having a vascular channel and a vascular wall. The interventional device comprises: a first guide, the distal end of which is capable of distally moving within the vascular channel and establishing a first support point in the vascular channel; a second guide, the distal end of which is capable of passing through the first guide, distally moving within the vascular channel, and establishing a second support point in the vascular channel, such that the second guide extends in an arcuate manner between the first and second support points; and a puncture kit for carrying an electrode, the distal end of which is capable of passing through the first guide, distally moving within the vascular channel, and puncturing the vascular wall in a target puncture area between the first and second support points, thereby implanting the carried electrode into the brain. The present disclosure also relates to a medical device.

A flush syringe with a syringe coupler facilitates twice dispensing of intravenous flushing solution to a patient's vascular access device (VAD), with reduced risk of VAD infection. The syringe coupler incorporates a female, first Luer connector on its proximal end that is removably coupled to the male, barrel Luer connector of the syringe, isolating the latter connector from external contamination. The syringe coupler also has a single-use, male, second Luer connector on its distal end of the housing that is adapted for coupled insertion into the patient's VAD, for delivery of at least a portion of the flushing solution retained within the syringe. After the first delivery, the syringe coupler is de-coupled from both the VAD and the syringe. Thereafter, the syringe's unused, sterile, male, barrel Luer connector is directly coupled to the VAD for dispensing the second portion of the flushing solution.

The embodiment of the utility model provides a device and a system for simulating microsphere embolism, and relates to the field of medical experiment equipment. The microsphere embolism simulation device comprises a transparent cover plate and a bottom plate, the transparent cover plate is provided with a first arc-shaped groove, the bottom plate is provided with a second arc-shaped groove, the bottom plate and the transparent cover plate are spliced, so that the second arc-shaped groove and the first arc-shaped groove jointly define a circular blood vessel simulation channel, the transparent cover plate is adopted, the visibility is good, and the blood vessel simulation effect is good. Meanwhile, the cover plate and the bottom plate can be spliced and can be conveniently cleaned after being detached, that is, the blood vessel simulating channel is convenient to clean, the formed blood vessel simulating channel is circular and is closer to blood vessel simulation, and the blood vessel simulation effect is improved.

Disclosed are implantable devices, systems, and methods of fabricating, testing, optimizing, and / or implanting such devices. An implantable device includes a body, a first intrinsic channel network formed in the body and configured to receive cells, and a second intrinsic channel network formed in the body and configured to allow for active flow of a fluid to support viability and / or function of the cells in the first intrinsic channel network. The first intrinsic channel network comprises a first channel and the second intrinsic channel network comprises a second channel, with at least segments of the first and second channels parallel to and spaced apart from each other. Cells may be suspended in a collagen matrix and introduced to the first intrinsic channel network.

This invention belongs to the field of organ-on-a-chip technology, proposing a method for constructing an in vitro brain lymphatic system chip and a brain lymphatic system chip, filling the gap in the construction of in vitro models of brain lymphatic systems. First, the microfluidic channels in the chip are rinsed, sterilized, washed, and cultured with cells. Then, vascular channel cells and brain parenchyma channel cells are seeded in the treated microfluidic channels. Finally, in the vascular channels, perfusion is performed at a preset flow rate and at preset intervals to provide shear force stimulation mimicking pulsed blood flow. Continuous perfusion achieves the basic formation of in vitro brain blood vessels. The intermittent fluid flow mimicking arterial pulsations is achieved through this preset flow rate and preset interval perfusion.

Self-expanding plug embodiments may be used in conjunction with vascular closure device embodiments to promote hemostasis at surgical sites or any other suitable location. In some cases, vascular closure device embodiments may include self-expanding plug embodiments in order to promote hemostasis at a surgical site during a vascular closure procedure.

The application discloses a balloon blocking microcatheter, which comprises a catheter seat, an inner tube, an outer tube, a balloon tube, a developing ring, a soft tip and a stress release tube, and the inner tube has a three-layer structure, namely an inner layer, an intermediate layer and an outer layer. The intermediate layer is a unique hypotube structure, so that the balloon blocking microcatheter has excellent passability in the blood vessel, and the inner cavity is not compressed, so that the subsequent treatment instrument or medicine can enter the body normally and smoothly, thereby improving the treatment effect and safety of the instrument as a whole. The catheter seat has two independent channels, which can avoid the possibility of intercommunication of the two cavities under high injection pressure, thereby improving the use success rate of the instrument. The balloon is made of silicone rubber material and has super high compliance, which can fit and block complex blood vessel channels, thereby improving the overall treatment effect.

Alternative-reality devices and methods are disclosed for establishing and visualizing historical sites of vascular access, which are useful for evaluating potential sites of vascular access and improving the successes of obtaining vascular access. For example, an alternative-reality device includes anatomical target-defining instructions and vascular access site-tracking instructions in memory of the alternative-reality device for execution by one-or-more processors thereof. The alternative-reality device also includes a patient-facing camera configured to capture images or video frames for generating an anatomical target in the memory per the anatomical target-defining instructions and tracking the historical sites of vascular access in relation thereto with the vascular access site-tracking instructions. With a display screen of the alternative-reality device, a user can instantly see an environment including an anatomical portion of a patient to which the anatomical target corresponds, as well as graphical elements anchored to the anatomical portion indicating the historical sites of vascular access.