18 results about "Venous puncture" patented technology

To provide a blood purification device that can accurately determine whether a venipuncture has been performed correctly in a patient. [Solution] The blood purification device 1 comprises a blood purifier 3 capable of purifying blood, a blood circuit 2 having an arterial blood circuit 21 with an arterial puncture needle 211 attached to its tip and a venous blood circuit 22 with a venous puncture needle 221 attached to its tip, an impedance measuring unit 5 having an oscillator 53 that applies an AC voltage between an arterial electrode 51 provided on the arterial blood circuit 21 and a venous electrode 52 provided on the venous blood circuit 22, and capable of measuring the frequency characteristics of the impedance between the arterial electrode 51 and the venous electrode 52, and a puncture determination unit 72 that determines whether the patient has been properly punctured based on the measured impedance frequency characteristics, and further comprises a frequency range determination unit 70 that determines the frequency range of the AC voltage applied by the oscillator 53 according to the liquid in the blood circuit 2.

The application provides an ultrasound-guided puncture method and system, relates to a data processing technology, and achieves accurate positioning during venous puncture under ultrasound guidance by constructing a part model corresponding to a puncture part, determining a partition scanning line of the part model, controlling an ultrasound device to perform segmented scanning on the puncture part based on the partition scanning line, obtaining a segmented scanning image, determining a segmented scanning image meeting a puncture condition as a sub-adaptive image, performing splicing processing on adjacent sub-adaptive images to obtain a spliced puncture image, performing venous shape judgment on the spliced puncture image to obtain a candidate puncture image, performing optimal selection on the candidate puncture image to obtain a puncture guide image, and determining a puncture point of a punctured vein in the puncture guide image based on a centripetal direction.

The utility model discloses a blood taking needle pressure regulating device, which relates to the field of blood taking needle negative pressure regulation and comprises a vein puncture needle, the output end of the vein puncture needle is fixedly connected with a connecting tube, butterfly wings protruding outwards are formed on the two sides of the outer wall of the connecting tube, the output end of the connecting tube is connected with a hose, and the hose is connected with a valve. The output end of the hose is connected with a butt joint in butt joint with a blood collection tube, a micropore is formed in the output end of the butt joint, a protruding tube protruding outwards is integrally formed on the periphery of the butt joint, an inner cavity of the protruding tube is communicated with an inner cavity of the butt joint, and the outer wall of the output end of the protruding tube is in threaded connection with a connector. And a one-way mechanism is arranged in the connector. Through the arrangement of the connector, the rubber sheet, the needle head and the one-way mechanism, the negative pressure effect of the blood taking needle can be improved, blood can flow more smoothly, external air cannot enter the blood taking needle, and the cleanliness of the blood taking needle is kept.

The application discloses a kind of puncture equipment for assisting venipuncture, including controller, puncture table, appearance mechanism and auxiliary mechanism, one side of puncture table forms puncture area, and puncture area is used to place human hand;Appearance mechanism and auxiliary mechanism are respectively arranged in the side of puncture table forming puncture area, controller is electrically connected with appearance mechanism and auxiliary mechanism respectively, and controller is used to control appearance mechanism, to make the vein blood vessel of human hand in puncture area appear;Auxiliary mechanism is used to obtain the image of hand vein blood vessel appearance and send to controller;Controller is used to mark vein path and puncture point to hand image respectively.The technical scheme in the application proposes that the vein blood vessel of human hand is assisted to appear by appearance mechanism, and the vein path and puncture point after appearance are marked in cooperation with auxiliary mechanism, so that medical staff can be quickly assisted to carry out venipuncture, reduce the dependence of medical staff on personal experience, and improve medical efficiency.

Embodiments described herein relate to a shunt for treating an aortic aneurysm and a robotic insertion system for implanting the shunt. In some embodiments, the shunt may include a central portion, an arterial sealing structure, and a venous sealing. In some embodiments, the venous sealing structure may have a lateral length in its deployed configuration, and the arterial sealing structure having a lateral length in its deployed configuration that is greater than the lateral length of the venous sealing structure. The shunt may be advanced robotically in a delivery configuration through a venous puncture site of a vein to access an arterial puncture site of the artery, and then deployed, thereby enabling blood flow through the shunt from the artery to the vein.

A phlebotomy aid provides a capability to expand circulatory members for emphasizing venous appearance and accessibility on an epidermal surface. A warming sheath or sleeve extends over a patient forearm for introducing a thermal source adjacent to a patient blood vessel for emphasizing the vein appearance on the epidermal surface. A beating element in the sleeve is powered and controlled by a low voltage circuit for controlled thermal introduction for mitigating discomfort from overheating and eliminating proximity of potentially harmful electrical exposure.

The present disclosure provides methods, systems, devices, kits, and reagents for performing single cell sequencing (e.g., single cell RNA sequencing) from a low volume, capillary blood (or any low volume blood sample which is not obtained from a vein or by venipuncture).

The invention relates to the technical field of medical auxiliary instruments, and discloses a venipuncture fixing guider with a locking function, which comprises a fixing assembly, the fixing assembly comprises a bearing plate, the top of the bearing plate is provided with an arm ring assembly, and one end of the top of the bearing plate is provided with a holding assembly. The two ends of the holding assembly are fixedly communicated with the pressing assemblies, the arm ring assembly fixes the arms of a patient, the holding assembly and the pressing assemblies cooperate together to further fix the hand back of the patient and press the epidermis of the hand back to display vein blood vessels, the translation assembly and the angle adjusting assembly are matched, and a blood vessel inserting needle is locked under the assistance of the pressing assemblies. The angle adjusting assembly comprises a fixed static plate, a hinge is installed at one end of the fixed static plate, a needle inserting movable plate is installed at the top end of the hinge, the rotating angle of the hinge is 15-30 degrees, the needle inserting movable plate enables the needle inserting angle to be stably kept at 15-30 degrees under the action of the hinge, and the phenomenon of early-stage puncture errors of infusion exosmosis is avoided.

To provide a blood purification device that can accurately determine whether a venipuncture has been performed correctly in a patient. [Solution] The blood purification device 1 comprises a blood purifier 3 capable of purifying blood, a blood circuit 2 having an arterial blood circuit 21 and a venous blood circuit 22, an impedance measuring unit 5 having an oscillator 53 that applies an AC voltage between an arterial electrode 51 provided on the arterial blood circuit 21 and a venous electrode 52 provided on the venous blood circuit 22, and capable of measuring the frequency characteristics of the impedance between the arterial electrode 51 and the venous electrode 52, and a puncture determination unit 72 that determines whether the patient has been punctured normally based on the measured impedance frequency characteristics, and further comprises a voltage control unit 70 that controls the amplitude of the AC voltage applied by the oscillator 53 so that the amplitude of the AC current that flows when the AC voltage is applied from the oscillator 53 is greater than or equal to a preset lower threshold.

An ultrasound-guided vascular puncture and catheterization system is disclosed. This relates to the field of arterial and venous puncture and catheterization. Existing ultrasound puncture frames often employ a cannula-guided design, which only assists puncture and cannot facilitate rapid catheter placement. Their angle adjustment range is relatively fixed. Therefore, this invention provides an ultrasound-guided vascular puncture and catheterization system based on an exoskeleton guide rail. This invention includes a tail-end fixing seat, guide rails, a puncture frame body, a needle holder slider, and an imaging fine-tuning device. The tail-end fixing seat is fixedly connected to the tail ends of two guide rails. A needle holder slider is installed between the two guide rails and slides along the direction of the rails. The heads of the two guide rails have a bent structure, and the bent portion of the guide rail head is inserted into a socket in the imaging fine-tuning device. The imaging fine-tuning device is fixedly connected to the lower part of the puncture frame body. This invention is applied in the field of ultrasound-guided vascular puncture and catheterization.

The invention relates to the technical field of venous indwelling catheter puncture navigation, and discloses a central venous indwelling catheter puncture auxiliary system through peripheral vein puncture. According to the system, an ultrasonic image and a dissection description text are acquired through a data acquisition and verification module; a three-dimensional blood vessel modeling module is used for carrying out spatial registration on the two blood vessels, and a three-dimensional blood vessel model containing semantic information is constructed; the anatomical variation analysis module is compared with a standard map, a variation region is automatically marked, and the puncture feasibility is evaluated; the puncture path planning module generates a target path in the feasible blood vessel model in combination with the instrument parameters, and decomposes the target path into executable steps associated with real-time ultrasonic features and specific operation instructions; and finally, the path conflict detection and navigation control module carries out calibration and sends an instruction to control the puncture auxiliary device to align. According to the method, a closed loop from objective evaluation of multi-source information fusion to programmed step navigation is realized, and the dependence on personal experience and spatial imagination of an operator is reduced.

The utility model discloses an integrated central venous catheter, which relates to the technical field of central venous catheterization and comprises a catheter main body, a catheter tip is arranged at the front end of the catheter main body, a guide wire cavity, a main cavity and a plurality of side cavities are arranged in the catheter main body, the front end of the guide wire cavity is sealed, a guide wire is inserted in the guide wire cavity, and the side cavities are communicated with the guide wire cavity. A main hole communicated with the main cavity is formed in the front end of the catheter tip end, a needle penetrating hole is formed in the rear position of the lower side of the outer wall of the catheter body, a puncture needle is inserted into the main cavity, and the puncture needle penetrates out of the main hole from the inlet-outlet front end of the needle penetrating hole on the rear side. And the puncture efficiency is improved, so that the rescue success rate is improved, the sterile operation exposure time is shortened, the related infection risk is reduced, puncture complications related to the guide wire are avoided, unnecessary injuries of a patient can be effectively reduced, the occurrence rate of the complications is reduced, and meanwhile potential doctor-patient disputes are reduced.

The invention provides an intelligent positioning and auxiliary puncture device for venipuncture, and relates to the technical field of medical instruments. The intelligent positioning and auxiliary puncture device for venipuncture comprises a base, a binding mechanism is arranged on one side of the base, a moving mechanism is installed on the other side of the base, the moving mechanism comprises a sliding shell fixed to the upper end of the base, a stand column is slidably connected to the sliding shell, a cross beam is slidably connected to the stand column, and the cross beam is fixedly connected to the base. A lifting seat capable of vertically sliding is installed on the cross beam, and one side of the lifting seat is connected with a fine adjustment mechanism. According to the device, accurate adjustment of the spatial position and angle of the needle head is achieved through cooperation of the moving mechanism and the fine adjustment mechanism, the skin is automatically tightened through the tightening mechanism to expose and fix the blood vessel, the needle inserting depth is accurately controlled through the limiting mechanism, and the device effectively solves the problems that the blood vessel slides and needle inserting is too deep; and the definition, the success rate and the operation safety of puncture positioning are obviously improved.

1. Name of the product in this design: Vein Imaging Device (Multifunctional). 2. Purpose of this design: This design is used for locating veins and for venipuncture. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

In one aspect, a method and system for detecting a change in fluid dynamics of a fluid flowing through an extra-corporeal circuit is disclosed, which includes establishing an acoustic wave resonance across a transverse dimension of at least a portion of a line associated with the extra-corporeal circuit through which the fluid flows, monitoring a phase signal of the resonant acoustic wave, and identifying occurrence of a change in fluid dynamics of the flowing fluid when the observed phase signal of the resonant acoustic wave indicates a deviation from the expected fluid flow signature. The change in fluid dynamics can be used to indicate a venous needle dislodgement event.

The utility model discloses an intelligent venipuncture training device which comprises an arm model, the surface of the arm model is sleeved with simulation skin, a simulation blood vessel is arranged on the arm model, puncture areas are arranged on the elbow and the wrist of the simulation blood vessel respectively, and a temperature adjusting area is arranged at the tail end of the arm model. Through cooperative use of the arm model, the simulated skin, the simulated blood vessel, the first Peltier element and the vibrator, dynamic adjustment of the diameter and elasticity of the simulated blood vessel can be realized, blood vessel characteristics of children, old people and in a pathological state can be accurately simulated, a highly simulated operation environment is provided for students, and the training efficiency is improved. Trainees can be familiar with puncture difficulties of different types of patients in simulation, and the clinical puncture success rate in a complex environment is improved; complex clinical scenes can be simulated, medical staff can be helped to master puncture skills dealing with different conditions in training, and the number of trial and error times in actual operation is reduced.

The invention relates to a pneumoperitoneum-free laparoscopic surgery suspension system which comprises a suspension unit and a supporting system. The suspension unit comprises a plurality of pairs of puncture needles with hollow structures and guide wires penetrating through each pair of puncture needles; the supporting system is used for tightening and fixing the two ends of the guide wire. Compared with the prior art, the flexible full abdominal wall suspension system based on the central venipuncture guide wire is easy and convenient to operate and low in cost, does not need special equipment, can provide an excellent operation space comparable with a pneumoperitoneum method, and can be used for gasless laparoscopic cholecystectomy; the problems that physiological interference complications are caused by a traditional pneumoperitoneum method, and an existing pneumoperitoneum-free abdominal wall subcutaneous suspension device is insufficient in surgical field exposure, poor in patient BMI adaptability, dependent on special and expensive equipment, complex in operation, prone to causing abdominal wall injuries and the like are effectively solved.

The utility model relates to the technical field of medical instruments, in particular to a vein hemostasis patch which comprises a medical proof fabric, aseptic cotton attached to a wound surface is fixed on one side of the medical proof fabric, a capsule is attached to the other side of the medical proof fabric, and the interior of the capsule is divided into a water layer filled with water and an expansion layer filled with water absorption expansion materials through a diaphragm. And a pre-embedded needle for puncturing the diaphragm is also fixed in the expansion layer. During use, the aseptic cotton is attached to a vein wound surface and then fixed through the medical proof fabric, after the capsule is pressed, the pre-embedded needle pierces the diaphragm, so that water in the water layer flows into the expansion layer and is absorbed by the water-absorbing expansion material, and after the water-absorbing expansion material expands, the capsule pressurizes the wound surface, so that the wound surface is prevented from being damaged. Therefore, under the condition that the bleeding amount and exudation after venipuncture are limited, the wound surface liquid does not need to be passively absorbed to achieve pressurization, and the pressurization effect is improved.