20 results about "Needle catheter" patented technology

The utility model discloses a pulmonary alveolar lavage fluid collecting device for rats and mice, which comprises a lavage needle (100), the lavage needle (100) comprises a needle head (101), a catheter (102) and a tube seat (103) which are sequentially communicated and connected from bottom to top, the outer surface of the needle head (101) is smooth and is used for preventing the tracheal wall from being scratched; the catheter (102) is arranged on the lavage needle (100), the trachea clamp (200) is provided with a reverse fork locking clamp structure, and the trachea clamp (200) is matched with the catheter (102) of the lavage needle (100) and used for stably clamping the catheter (102). By designing the special lavage needle and the trachea clamp, efficient and safe alveolar lavage fluid collection without suture line ligation is realized, the operation process is simplified, the sample quality and the experiment efficiency are improved, and meanwhile, the alveolar lavage fluid collection device can meet the requirements of experimental animals with different sizes.

The invention discloses a deep vein puncture integrated device for monitoring the pH value of blood in a blood vessel and a use method, and belongs to the technical field of medical equipment, the deep vein puncture integrated device comprises a remaining needle catheter, the remaining needle catheter comprises a first pipeline and a second pipeline which are relatively independent, the first pipeline is used for conveying therapeutic liquid, and the second pipeline is used for blood sampling; the three-way valve is arranged on the indwelling needle seat, three ports of the three-way valve are communicated with the second pipeline, the pH value detection unit and the flushing fluid unit respectively, and the three-way valve is provided with a knob used for driving the three-way valve to be switched among different working positions; the control module is in signal connection with the pH value detection unit, the three-way valve driver and external clinical equipment. The whole process of sampling, detecting and flushing can be automatically and intermittently completed according to the preset period, and an almost continuous pH value dynamic change trend curve is provided, so that intervention is performed before clinical symptoms are obviously deteriorated, and the timeliness and accuracy of treatment are remarkably improved.

This invention discloses a flexible biopsy needle robot with force sensing function and its lung navigation method, belonging to the field of lung disease diagnosis and treatment. The robot includes a movable support, a drive system, and a flexible biopsy needle catheter. The drive system is mounted on the movable support via an electric slide, and the flexible biopsy needle catheter is mounted on the drive system. The movable support is used for coarse adjustment of the pose of the flexible biopsy needle catheter, and the electric slide is used for coarse adjustment of the axial feed motion of the flexible biopsy needle catheter. The drive system includes a deflection drive mechanism and a feed mechanism, used for fine adjustment of the omnidirectional deflection motion and axial feed motion of the flexible biopsy needle catheter, respectively. The drive system integrates a single-axis force sensor with high dynamic response, which can be used to detect the puncture force of the flexible biopsy needle, realizing the puncture force sensing function. This invention has the advantages of compact structure and good flexibility, and can play a significant role in the diagnosis of thoracic surgical diseases.

The invention belongs to the technical field of medical equipment, and particularly discloses an h-shaped indwelling needle catheter base structure and a manufacturing method.The h-shaped indwelling needle catheter base structure comprises a catheter base and a plug, a catheter hole and an extension tube hole are formed in the upper end face of the catheter base, and the axis of the catheter hole is parallel to the axis of the extension tube hole; the guide pipe hole is a step-shaped through hole, the extension pipe hole is a blind hole, a boss is arranged below the extension pipe hole, and a pin hole is formed in the lower end face of the boss. The pin hole is a counter bore, the bottom of the pin hole is located at the partition position of the lower ends of the guide pipe hole and the extension pipe hole, and the bottom of the guide pipe hole is communicated with the bottom of the extension pipe hole. The plug is mounted at the lower end of the pin hole; according to the indwelling needle catheter seat, the existing Y-shaped catheter seat structure is newly designed, and the existing injection molding process of upper and lower mold closing and multidirectional core pulling is changed into the injection molding process of upper and lower mold closing; and the die structure is simplified, the production efficiency is improved, and the production cost and the die manufacturing cost are reduced.

The puncture assembly comprises a puncture needle and a needle catheter, a first opening is formed in the near end of the puncture needle, a solid needle tip is arranged at the far end of the puncture needle, a second opening is formed in the side wall, close to the needle tip, of the puncture needle, and the puncture needle is provided with an axially-formed inner cavity; the inner cavity extends from the first opening to the second opening, so that the first opening and the second opening are communicated with each other; the puncture needle is used for being arranged in the needle catheter in a sealed and penetrating mode and can axially move relative to the needle catheter so as to be switched between a first state and a second state, and when the puncture needle is switched to the first state relative to the needle catheter, the second opening is opened by the needle catheter; and when the puncture needle is switched to the second state relative to the needle catheter, the second opening is closed by the needle catheter. The puncture needle has the advantages of a hollow needle and a solid needle, so that the puncture efficiency is higher in the puncture process, the operation time is shortened, and the probability of adverse events such as tissue damage and embolism of a patient is reduced.

A catheter comprises: a needle (2) that pierces into tissue; and an obturator 3 insertable in an extractable manner relative to the needle, the needle having: a hollow needle body 2a with a sharp distal end portion 2t; and a needle hub 2b supporting a proximal end portion 2e, the interior of the needle body comprising: a single lumen 2p that is continuous from the proximal end portion to the distal end portion; and a closed end portion (2c) that closes the lumen, and that has a circular and continuous contour shape in the shape of an arc.

Systems and methods are provided for navigating within the heart and attaching to the wall of the heart for performing injection of one or more agents into tissue. The system includes an outer catheter, a mid catheter slidably disposed within a lumen of the outer catheter, and a needle catheter slidably disposed within a lumen of the mid catheter. The mid catheter includes a vacuum hood attached to a mid catheter distal end such that a radiopaque distal tip of the mid catheter extends into the vacuum hood. The vacuum hood includes at least two radiopaque features, the spatial relationship of which visibly changes under fluoroscopy when the vacuum hood is under sealed vacuum.

The utility model relates to a dispensing device for gynecological tumor department nursing, including dispensing cabinet, the operating table is equipped in the middle part of dispensing cabinet, the operating table upper portion is equipped with the rotating disc and is used to drive the first drive mechanism of rotating disc rotation, the rotating disc is equipped with a plurality of first clamping parts for clamping small medicine bottle along its circumference, the operating table bottom is equipped with the second clamping part of being located small medicine bottle directly below and is used to drive the second drive mechanism of second clamping part along the vertical direction removal, the operating table bottom still has the medicine bottle of placing, small medicine bottle and medicine bottle are connected through the catheter, and the both ends of catheter are equipped with needle respectively, and the middle part of catheter is equipped with infusion pump, and the second clamping part is used for clamping the catheter and needle close to small medicine bottle one end. This dispensing device for gynecological tumor department nursing can reduce the time of medical staff contacting small medicine bottle with hand in the dispensing process, thereby reducing the risk of infection, and protecting the health of medical staff.

The utility model discloses a special water stop clamp structure for an ultrasound contrast indwelling needle in the technical field of ultrasound contrast auxiliary instruments, which comprises an outer frame of a special water stop clamp for the ultrasound contrast indwelling needle, the outer frame is in a square ring shape, a sliding groove is arranged on the outer frame, a sliding block is arranged on the sliding groove, and the sliding block is connected with the sliding groove. The bottom of the sliding block is connected with a pressing plate used for pressing a remaining needle catheter, the inner wall of the outer frame is provided with a protruding part matched with the bottom end of the pressing plate, and the sliding block is provided with a pressing assembly used for preventing the pressing plate from moving. The utility model solves the problems that most of remaining needles on the market at present are generally composed of an upper clamping assembly, a lower clamping assembly and a torsion spring, blood backflow is prevented by clamping a catheter, the blood backflow can be really prevented through the mode, but the remaining needles are limited by materials and have structural defects, the actual operation is inconvenient, and the working efficiency is high. The problems that the clamping effect can be achieved only by using certain force, single-hand operation is inconvenient, and conveying and stopping of the catheter are inconvenient to switch are solved.

Disclosed herein is a catheter insertion device including a catheter slidably mounted within a retractable needle. The catheter can have multiple features to help a user such as a physician. The catheter can include a magnified optical window to view blood flashback. The catheter can include securement wings to minimize rotation or movement when the catheter is inserted. The catheter can include a countdown prior to automatic needle retraction. The catheter can include a proximal blood valve to minimize blood flow into the proximal end of the catheter.

This invention discloses a highly transparent antibacterial medical TPE alloy material and its preparation process, belonging to the field of medical polymer materials technology. This material uses a thermoplastic elastomer as the matrix, compounded with compatibility aids, transparent modifiers, and antibacterial functional components, and is prepared through melt blending modification. The material is entirely free of PVC and DEHP plasticizers, possessing excellent light transmittance, flexible texture, resistance to repeated bending, and good biocompatibility. It also exhibits stable antibacterial properties and low substance release characteristics, making it widely applicable to medical infusion tubing, indwelling needle catheters, medical connecting fittings, disposable protective consumables, and other medical contact products. The preparation process is simple and controllable, with high production efficiency, meeting the usage standards and mass production requirements of medical-grade materials.

The methods and devices described herein are used to a) inject / deliver fluid to and / or expel / remove fluid from an eye. One of the devices may include a probe including: a body having a distal end portion; a needle extending and retracting from an exit location on a side surface of the distal end portion, the needle having a needle catheter; and one or more probe conduits for moving the fluid through the probe, the one or more probe conduits fluidly coupled with the needle conduit. During use, a portion of the side surface having the exit location is placed adjacent to the surface of the eye, and the needle is extended to penetrate the eye, and the fluid is injected or expelled through the needle catheter.

A catheter (12) may include an elongate tube (16) having a body portion (20), a distal tip portion (22) extending in a distal direction from a distal end of the body portion, a distal opening at a distal end of the distal tip portion, an outer surface (47), and an inner surface defining a lumen terminating at the distal opening and extending through the body portion and the distal tip portion. The elongate tube may include a preformed curve proximate the distal end of the body portion and configured to direct the distal opening away from or parallel to a distal inner surface of a vessel. The elongate tube may include one or more voids extending proximally from a distal opening at a distal end of the distal tip portion. The catheter (12) may be part of or configured to be used in an over-the-needle catheter system (10).

Long-term catheter assemblies (100) are described, each comprising a housing (102) having an interior (104) containing a catheter assembly (108), which may include a catheter tube (110) and a needle (112). The catheter tube (110) of the catheter assembly (108) can be placed in a patient's vein, with or without a guidewire, and the long-term catheter assembly (100) can then be activated to separate into two or more housing components (193, 194) or by opening a gate (340, 606a, 606b) to allow separation of the catheter assembly (108) from the housing (102). A needle shield (140) may be included to cover the needle tip (114) of the needle (112) from needlestick injuries.

The utility model relates to the technical field of medical examination equipment, and discloses a blood collector for medical examination, which comprises a needle head, a catheter and a blood collection cylinder, the catheter is connected with the needle head and the blood collection cylinder, and a fixing mechanism is arranged on the catheter; the fixing mechanism comprises a medical non-woven fabric and a first medical double-faced adhesive tape, the medical non-woven fabric and the first medical double-faced adhesive tape form a lantern ring which is arranged on the catheter in a sleeving mode, the medical non-woven fabric is located on the upper portion, the first medical double-faced adhesive tape is located on the lower portion, and the medical non-woven fabric and the first medical double-faced adhesive tape are bonded together. Compared with the mode that the catheter and the human body are directly bonded through the first medical double-faced adhesive tape, the mode has the advantages that the catheter cannot be extruded on the premise that bonding is stable, flowing of blood in the catheter is guaranteed, the overall structure is simple, and the material cost and the production cost are low.

An apparatus for vascular access is described herein. The apparatus can comprise a cart movable from a first location to a second location near a patient, a manipulating device configured to releasably couple a cartridge including a needle, a catheter, and a guidewire that are coaxially disposed with respect to each other, and a robotic arm having a first end mounted to the cart and a second end coupled to the manipulating device. The manipulation device can include a plurality of actuation mechanisms configured to selectively advance the needle, the catheter, and the guidewire when the manipulating device is coupled to the cartridge. The robotic arm can include a plurality of joints that are configured to rotate about a plurality of axes to position the cartridge relative to the arm of the patient such that the needle, the catheter, and the guidewire can be inserted into a target vessel of the patient.

The catheter includes a needle 2 that is punctured into tissue and an obturator 3 that is extractably inserted with respect to the needle, the needle has a hollow needle body 2a with a pointed distal end portion 2t and a needle hub 2b that supports a proximal end portion 2e, the interior of the needle body includes a single lumen 2p continuous from the proximal end portion to the distal end portion and a closed end 2c that closes the lumen, and the closed end has a contoured shape that is rounded and continuous in the shape of an arc.

Systems and methods for delivering needles or catheters within target tissue including an apparatus that includes or a method involving, structure configured for placing a needle, a catheter or a cannula to provide vascular access. In one or more approaches, a vascular access device or system is provided for hemodialysis.

The invention discloses a hemodialysis indwelling needle catheter with anti-turbulence and anti-reflux functions, and belongs to the technical field of medical instruments. The catheter comprises a catheter main body made of a biocompatible material, and the interior of the catheter main body is divided into an independent blood output channel and an independent blood input channel; the far-end implantation section of the catheter is provided with two axially staggered fluid mechanics optimization side hole areas which are respectively used as blood inlets and blood outlets of the two channels, the inlet area is positioned at the farthest end, and the outlet area is positioned behind the near end of the far-end implantation section; a one-way valve clack type anti-backflow device is integrally arranged in each channel and behind the near end of the corresponding side hole area; turbulence and shear injury are inhibited by optimizing side hole parameters, one-way flow of blood is ensured through the built-in one-way valve, and safety and efficiency of dialysis treatment and long-term smoothness of the catheter are improved.

Systems and methods for delivering needles or catheters within target tissue including an apparatus that includes or a method involving, structure configured for placing a needle, a catheter or a cannula to provide vascular access. In one or more approaches, a vascular access device or system is provided for hemodialysis.