40 results about "Needle catheter" patented technology

The present invention discloses a high-precision chip-type micropump wearable precision syringe, which specifically relates to the technical field of medical devices. The present invention evacuates a hydraulic liquid supply tank to a vacuum to form a negative pressure, and then the needle tip of a liquid-filled injection needle pierces a heparin cap, so that the drug driving liquid is pressed into the hydraulic liquid supply tank and squeezes the piston of the pushing unit to move to one side. The volume of the hydraulic liquid supply tank increases, and the drug driving liquid enters the micropump unit through the micropump liquid inlet hole. Since the micropump unit swings to a fixed value each time, the drug driving liquid is accurately driven and controlled, and the injection volume is accurately controlled. The piston member in the cartridge bottle is pushed forward to quantitatively push the injection liquid, and the liquid drives the liquid, so that the infusion is accurate and reliable; the implanted spring pushes the indwelling needle catheter seat to be clamped into the convex ring cavity. Afterwards, the stainless steel needle is withdrawn, leaving only the soft indwelling needle catheter in the blood vessel. Injection is performed through the indwelling needle catheter without waiting for too long, thereby reducing the discomfort and pain caused to the patient.

The utility model relates to the technical field of medical instruments, in particular to a thyroid puncture positioning frame which comprises two sets of arc-shaped rods, supporting frames are connected between the ends of the two sets of arc-shaped rods respectively, positioning blocks are sleeved on the outer sides of the arc-shaped rods in a sliding mode, and puncture needle catheters penetrate through the middle portions of the positioning blocks. Two sets of arc-shaped guide holes matched with the arc-shaped rods to penetrate through are formed in the positioning block, and clamping and positioning mechanisms matched with the arc-shaped rods are arranged at the two ends of the arc-shaped guide holes correspondingly. Compared with the prior art, the thyroid sampling device has the advantages that the positioning block slides on the outer sides of the two sets of arc-shaped rods, the inclination angle of the puncture needle catheter is adjusted, the positioning block is fixed to the outer sides of the two sets of arc-shaped rods through the clamping and positioning mechanism, the puncture needle penetrates through the puncture needle catheter, and a needle head is inserted into a thyroid affected part of a patient for sampling. The angle of the puncture needle is limited through the puncture needle catheter.

This puncture needle system includes: a delivery catheter that comprises a first hollow shaft having a first lumen therein, and that is provided with a lateral surface opening communicating between the first lumen and the outside on a lateral surface of the first hollow shaft; a needle catheter that comprises a hollow puncture needle having a curved section at a tip section and a tip opening at the tip, and that comprises a second hollow shaft continuing to a puncture needle, disposed closer to a base end side than the puncture needle, communicating with the inside of the puncture needle, and having therein a second lumen communicating with the outside via the tip opening; and a stylet wire. The needle catheter is pushed forward in the first lumen toward the tip side of the delivery catheter in an insertion state in which the stylet wire is inserted into the second lumen and protrudes from the tip opening, and then the stylet wire is removed from inside the second lumen, thereby causing the puncture needle to protrude to the outside from the lateral surface opening.

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.

This medical connector comprises: a base section having a first through-hole for inserting a first medical device; an intermediate section having a second through-hole connected to the first through-hole, the intermediate part further having, on the inner peripheral surface of the second through-hole, a first portion in which the inner diameter decreases from the base end side toward a tip side, and a second portion that is connected to the tip side of the first portion and in which the inner diameter of the second portion gradually becomes smaller than the inner diameter of the first portion from the base side toward the tip side; and a tip section that has a third through-hole connected to the second through-hole, the third through-hole being for inserting a second medical device.

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 invention discloses a cryoradiofrequency ablation catheter and system, and belongs to the technical field of cryoablation, the cryoradiofrequency ablation catheter comprises a needle catheter part, a handle, a catheter extension tube assembly, a plug assembly, a vacuum plug assembly and a cable plug assembly; the needle head catheter part is flexible; a far-end connecting needle catheter part of a near-end connecting catheter extension tube assembly is handheld and used by a user, and the far end of the catheter extension tube assembly is connected with a handle near-end connecting plug assembly; the far end of the plug assembly is connected with the near end of the catheter extension tube assembly; the far end of the vacuum plug assembly is connected with the plug assembly and extends into the vacuum layer of the needle catheter part. The high-pressure nitrogen or argon throttling freezing technology is used as a freezing mode, only the front-end flexible guide pipe section needs to be subjected to vacuum heat insulation, and the pressure resistance characteristic and local heat insulation of the pipeline and the connector are optimized. Meanwhile, a rewarming module and a radiofrequency ablation module are added on the basis of the cryoablation probe, and central control switching of the three modules is achieved.

A catheter insertion system includes a housing extending along a longitudinal axis. A needle extends distally from a distal end of the housing. The needle has a longitudinal passage coaxially aligned with the housing. A catheter has a length and is sized and shaped to be advanced from a retracted position within the longitudinal passage of the needle to an extended position with at least a portion of the catheter length extending beyond a distal tip of the needle. The needle is typically configured to be retracted back into the housing after the catheter has been advanced thus providing an integrated catheter and catheter insertion apparatus. After needle retraction, the housing may be taped to the patient's skin while the needle remains protected within the housing. A luer on the catheter may then be connected to a fluid or other source in an otherwise conventional manner.

An apparatus for vascular access is described herein. The apparatus can comprise 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 coupled to the manipulating device. The manipulation device or cartridge can include a plurality of actuation mechanisms configured to 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 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 invention discloses an ablation needle puncture system based on bioelectrical impedance, and relates to the technical field of biomedical engineering. The system comprises a puncture assembly, an electrical impedance measuring assembly and an ablation needle catheter, an operating rod is arranged in a hollow cavity of a puncture needle body, and an ablation needle guiding accessory is arranged on the operating rod; the electrical impedance measuring assembly is used for measuring electrical impedance information of peripheral tissues of the puncture needle body and judging a target tissue section where a focus is located according to the electrical impedance information; after the focus section is determined, the position of the ablation needle guide accessory is adjusted through the operating rod, so that the outlet corresponds to the focus section; a flexible section is arranged at the far end of the ablation needle catheter; an ablation needle hole is formed in the side wall of the puncture needle body, the ablation needle catheter is inserted through the guiding accessory and then punctures into a focus section through the ablation needle hole, and ablation is started after puncture is in place. According to the invention, the focus can be accurately identified and positioned, the ablation needle catheter is guided to enter the target tissue section where the focus is located for ablation, and the surgical operation difficulty is reduced.

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 utility model discloses a double-cavity indwelling needle, which relates to the technical field of medical instruments and comprises a needle body component, a shunting mechanism is arranged on the surface of the needle body component, a medicine injection mechanism is arranged on the surface of the shunting mechanism, and an indwelling needle catheter is arranged on the surface of the shunting mechanism. The isolation plug is matched with the catheter body, so that a cavity is formed in the catheter body, medicine injected by the second medicine connecting column can enter the cavity formed by the isolation plug and the catheter body through the connecting hole, and when the puncture needle body is pulled out, the medicine can flow into the catheter main cavity in the catheter main body through the connecting hole and is injected into the body of a patient. When two different drugs need to be injected, the drugs enter the connecting tube through the first drug connecting column, one end of the connecting tube is connected with the catheter auxiliary cavity, so that the drugs enter the catheter auxiliary cavity through the connecting tube and are injected into the body of a patient, the connecting tube is isolated from the cavity in the tube body, so that the drugs cannot influence each other, and the adaptability of the device is improved.

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.

This needle catheter comprises: a hollow puncture needle having a needle tip section and a needle base section positioned closer to the base side than the needle tip and having an outer diameter smaller than that of the needle tip section; a hollow shaft part having a shaft tip section and a shaft base section positioned closer to the base side than the shaft tip section; and an overlap part formed by inserting the needle base section into the shaft tip section. In the overlap part, the needle base section and the shaft tip section are joined by a first resin member positioned between the outer peripheral surface of the needle base section and the inner peripheral surface of the shaft tip section. The rigidity of the overlap part is lower than the rigidity of the needle tip section, but higher than the rigidity of the shaft base section.

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.

A wearable drug delivery device that can deliver a liquid drug stored in a container to a patient is provided. The container can be a prefilled cartridge that can be loaded into the drug delivery device by the patient or that can be preloaded within the drug delivery device when provided to the patient. A sealed end of the container is pierced to couple the stored liquid drug to a needle conduit that is coupled to a needle insertion component that provides access to the patient. A drive system of the drug delivery device can expel the liquid drug from the cartridge to the patient through the needle conduit. The drive system can be controlled to provide the liquid drug to the patient in a single dose or over multiple doses.

A catheter positioning system has an inner needle assembly, an outer needle assembly and a catheter assembly. The inner needle assembly has an inner needle, a stopper connected the inner needle, and a tube connected to the stopper. The outer needle assembly has an outer needle connected to a chamber. The outer needle is arranged concentrically with the inner needle so as to surround the inner needle. The catheter assembly has an internal catheter and an access hub. The catheter is arranged concentrically over the outer needle. The catheter is placed in a vein by piercing the vein with the inner needle, infusing liquid through the tube and inner needle to inflate the vein, sliding the outer needle into the vein over the inner needle, sliding the catheter into the vein over the outer needle, and then removing the first and second needles together, leaving the catheter in the vein.

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.

A closed system transfer device 10 comprises a syringe 12 having a hollow axially extending syringe body 14 with a plunger 16 slidably received therein to define a medicament chamber (18, fig 1(b)). A