154 results about "Interventional therapy" patented technology

The invention provides a CT guided liver puncture training method and system based on virtual reality, and relates to the technical field of virtual reality. A deformable liver model and a virtual CT reconstruction engine under respiration driving are constructed, needle body posture mapping and image fusion display are achieved by fusing an inertia-electromagnetic dual-mode sensor, path interaction control, tissue dynamic response and score feedback are supported, the scene difficulty is automatically adjusted based on a training result, and the accuracy and the reliability of the system are improved. Progressive puncture skill training of static breath-holding, shallow breath and free breath scenes is achieved, the sense of reality of training, operation feedback and teaching efficiency are improved, and the system is suitable for development and clinical teaching application of an interventional therapy training system under the guidance of medical images.

The invention relates to an interventional therapy target accurate positioning method and system based on an ultrasonic image. According to the method, a binary mask is generated by extracting an acoustic shadow area in an ultrasonic image, contrast enhancement parameters of different areas are dynamically adjusted based on the binary mask, and target spot edge details are enhanced while shadow area noise is suppressed; a shadow mask attention mechanism is combined to guide a neural network to accurately segment a target point probability graph, a segmentation boundary is evolved and optimized by integrating a level set constrained by a shadow region shape, and local smooth compensation is performed on registration deviation of a three-dimensional reconstruction model and a preoperative image by using a shadow perception deformation field correction strategy; and finally generating a puncture path for avoiding the dangerous structure. The problems of fuzzy target boundary, segmentation error accumulation and deformation compensation misalignment of a traditional method under acoustic shadow interference are effectively solved, and the pertinence of image enhancement, the accuracy of target positioning and the safety of an intervention path are remarkably improved.

The novel multichannel drainage device for liver and gall interventional therapy comprises a liquid collecting bag and a communicating pipe arranged at one end of the liquid collecting bag, a collecting barrel is arranged at the other end of the communicating pipe, and a plurality of drainage pipes are arranged at the other end of the collecting barrel; wherein sensor bodies are arranged at the middle ends of the drainage tubes, side holes are formed in the side faces of the top ends of the drainage tubes, and the drainage tubes are communicated with the collecting barrel and communicated with the communicating pipe. And a safer and more effective treatment tool is provided for liver and gall interventional therapy.

The invention provides an implant release system and an embolism interventional therapy device, and relates to the field of medical instruments.The implant release system comprises a push rod and a control line, the far end of the push rod is provided with a limiting block, and the limiting block is provided with a first containing cavity and a containing groove used for containing a connecting rod; the pushing rod is further provided with a second containing cavity used for containing the release head, the second containing cavity is located on the near end side of the limiting block, an opening allowing the release head to be disengaged is formed in the radial direction of the second containing cavity, and the orientation of the opening is consistent with the orientation of the containing groove. The control line is located in the hollow cavity of the push rod, and a cushion block is arranged at the far end of the control line. The implant can be smoothly released, the structure is simple, and the release operation is convenient.

The invention relates to the technical field of medical image processing and interventional therapy assistance, and discloses an intubation fluorescent image feature learning system for hepatic artery chemoembolization. Comprising an image acquisition module which is configured to acquire a distortionless two-dimensional fluorescent blood vessel image in a hepatic artery chemoembolization super-selective intubation process; the control module is used for extracting surface geometric features of the blood vessel from the two-dimensional fluorescent blood vessel image; inputting the surface geometric features to a preset spatial reasoning model, and outputting a spatial distribution probability matrix of each blood vessel part; capturing a difference signal between the spatial distribution probability matrix and angiography feedback data in an actual intubation process in real time, and forming an iterative training data set to optimize the spatial reasoning model; and identifying a potential complex blood vessel region according to the spatial distribution probability matrix, generating an intubation path early warning signal, and generating guide parameters of X-ray release opportunity and dose based on the early warning signal so as to reduce radiation exposure.

The invention relates to the technical field of medical guide wire storage, and discloses a guide wire storage mechanism for coronary heart disease interventional therapy, which comprises a shell, a motor I is arranged on the outer wall of the shell, the output end of the motor I penetrates through the interior of the shell and is fixedly provided with a screw rod, and the outer wall of the screw rod is in threaded connection with a sliding block I; a sliding rod is slidably connected to the interior of the first sliding block, the two ends of the sliding rod are fixedly connected to the inner wall of the shell, a triangular plate is fixedly connected to the lower surface of the first sliding block, a sprinkling can is arranged on the lower surface of the triangular plate, a spraying head is arranged on the inner wall of the sprinkling can, and a telescopic pipe is fixedly connected to the outer wall of the sprinkling can. A plurality of guide wires can be stored through the partition plate, the guide wires can be disinfected in cooperation with a first motor, a lead screw, a first sliding block, a sliding rod, a triangular plate, a sprinkling can and a spray head when the guide wires are stored, cross infection among different patients in subsequent use is prevented, the guide wires at different positions can be disinfected independently, and manpower and disinfection resources are saved.

The utility model discloses a vascular sheath and conveyor for assisting interventional therapy, which belongs to the technical field of medical instruments and comprises a sheath tube with a suction cavity in the middle, the sheath tube is sequentially formed by a lining layer, a middle layer and an outer tube layer from inside to outside in a sleeved composite mode, the lining layer and the outer tube layer are both high polymer material layers, the middle layer is a metal wire layer, and the outer tube layer is a metal wire layer. The middle layer has certain elastic restoring force; the middle layer is a woven net pipe of a net structure, the woven net pipe comprises a plurality of first woven wires and second woven wires, the first woven wires sequentially penetrate through the upper portions of the two second woven wires and then penetrate through the lower portions of the other two second woven wires, and the first woven wires are sequentially and circularly woven into a closed circular pipe. The sheath tube has the advantages that the first weaving wires and the second weaving wires are woven in a crossed mode to form the weaving net tube, so that the far end of the sheath tube has better radial elastic force and axial supporting strength, hardness and softness are achieved, and the outer diameter of the sheath tube can be reduced on the premise that the supporting strength of the sheath tube is guaranteed.

The invention discloses an adjustable targeting area type cryoablation needle with a heating function and a novel refrigerant hole structure, and belongs to the technical field of interventional medical instruments, the adjustable targeting area type cryoablation needle comprises a needle rod, a vacuum wall, a J-T groove, a J-T groove sleeve and an adjusting device; the vacuum wall is sleeved with the needle rod, the area from the far end of the needle rod to the far end of the vacuum wall is a target area, the area of the vacuum wall is a vacuum heat insulation area, and the vacuum wall comprises a vacuum wall outer pipe and a vacuum wall inner pipe; the J-T groove is formed in the vacuum wall inner tube, the far end of the J-T groove is located in the far end of the needle rod, and a side hole is formed in the side wall of the J-T groove; the J-T groove is sleeved with the J-T groove sleeve; the J-T groove sleeve and the vacuum wall are fixed together through a connecting piece and can move synchronously and axially. And the adjusting device is used for adjusting the length of the target area. By innovatively designing the arrangement of the cooling ablation air holes and the heat conduction isolation layer, more accurate control over the cryoablation range is achieved, and the safety and effectiveness of cryoablation interventional therapy are improved.

The invention relates to the technical field of medical instrument control and medical automation, and discloses a cardiovascular interventional therapy postoperative patient infusion supervision system and method. The method comprises the following steps: preheating an arterial pressure sensor to heat balance, and collecting baseline data according to a set interval and duration to calculate zero offset and noise; then, steady-state blood pressure is obtained at low, medium and high speeds, an average value is corrected, a calibration point is provided for quadratic polynomial mapping, and a coefficient is analyzed and solved; blood pressure is collected in real time, after zero correction, median filtering and moving average, the recommended infusion rate is calculated, amplitude limiting is conducted within the safe upper and lower limits, and the infusion rate is converted into a pump driving instruction; meanwhile, theoretical and actual accumulated infusion quantities are tracked, errors are calculated, and intelligent alarming is conducted by combining an error threshold value and signal effectiveness.

The invention relates to the technical field of ablation path planning, in particular to a liver cancer thermal ablation path planning system based on deep reinforcement learning. The system comprises a target and dangerous area mask generation module, a pipeline distance field construction module, a thermal field prediction module, a breathing deformation prediction module, a multi-scale feature fusion module, a behavior preference reward module, a composite reward function module and a decision output module. Clinical pain points such as breathing interference, dangerous area avoidance and individualized adaptation are broken, the precision and safety of the liver cancer thermal ablation operation are improved, normal tissue damage and complications are reduced, intelligent decision support is provided for interventional therapy, and liver cancer minimally invasive therapy is promoted to be upgraded to precision and intelligence.

The invention provides a postoperative patient supervision system for neural interventional therapy, and relates to the technical field of medical big data and artificial intelligence, and the system comprises a multi-modal data collection center, an interference feature decoupling unit, a trust capital quantification unit, a game strategy arbitration unit and a supervision execution unit. The multi-modal data acquisition center is configured to call time sequence monitoring data of a monitoring object; the trust capital quantification unit performs trust loss evaluation analysis on historical interaction feedback data; and the game strategy arbitration unit is configured to perform comparative analysis on the current clinical trust capital index and a preset trust threshold. According to the system, time-frequency domain matching is carried out on the residual error sequence and behavior state marking data, it is ensured that the system only carries out risk evolution prediction on neurogenic hemodynamic changes, and therefore the false alarm rate caused by external interference in a complex postoperative monitoring environment is remarkably reduced, and pure pathological feature components are extracted.

The application discloses a puncture assisting device for interventional therapy and belongs to the technical field of neurology. The puncture assisting device comprises a hoop, a cap body in rotational cooperation with the hoop, a first locking member for fixing the hoop and the cap body, the cap body is semispherical, a first opening slot is formed in the cap body along the generatrix of the cap body, and a puncture assembly is slidably arranged in the first opening slot along the length direction of the first opening slot. The puncture assembly comprises a puncture needle, a first ball and a second ball fixed to the outer side of the puncture needle, an arc-shaped slot matched with the second ball is formed in the side wall of the first opening slot, the first ball is matched with a ball sleeve, the ball sleeve is fixedly connected with a guide rod, a sliding support is slidably arranged on the cap body, a guide hole matched with the guide rod is formed in the sliding support, and the guide rod and the sliding support are fixed through a second locking member. The device can position the puncture needle before puncture, is stable in positioning and convenient to adjust.

The invention discloses a neurosurgery interventional therapy implantation dosing device, and belongs to the field of medical instruments, the neurosurgery interventional therapy implantation dosing device comprises an injection seat, the injection seat is provided with a first storage cavity for storing liquid medicine, the injection seat is provided with a catheter communicated with the first storage cavity, and the injection seat is fixedly provided with a first silica gel pad; the injection seat is provided with a flow guide assembly, the flow guide assembly is used for collecting tissue fluid generated by body rejection, the injection mechanism is fixed on an arm of a patient through a binding assembly, the injection mechanism is matched with the driving mechanism to add a medicament into the injection seat, and a flow guide groove in the outer wall of the injection seat guides the peripheral tissue fluid to flow. The supporting net facilitates the tissue fluid to enter the second storage cavity along the flow guide grooves, the arc-shaped plates in the second storage cavity are matched with the flow guide holes in the arc-shaped plates, the tissue fluid smoothly flows into the second storage cavity, and the structure constructs an efficient drainage path to efficiently collect the tissue fluid.

The invention relates to the technical field of medical instruments, and discloses an intervention pump conveying device which comprises an expansion assembly, a conveying assembly and a pushing assembly, and the conveying assembly comprises a front end assembly and a rear end assembly which are detachably and fixedly connected; the expansion assembly is detachably and fixedly connected with the front end assembly, the front end assembly and the rear end assembly are connected to form an intervention channel allowing the pushing assembly to carry the intervention pump to penetrate through, and the pushing assembly is provided with a pushing channel allowing a pump line of the intervention pump to penetrate through in the axial direction. The pushing assembly can fix or loosen a pump line of the intervention pump so as to achieve pushing and releasing of the intervention pump. The invention further discloses another conveying method of the interventional pump. By constructing a split type collaborative structure, accurate pushing and stable releasing of the interventional pump are achieved, mechanical invasion and occupation to punctured blood vessels are reduced, the risk of complications such as thrombosis and bleeding is reduced, the surgical operation process is simplified, and the minimally invasive property and safety of interventional therapy are improved.

Various components of an interventional therapy assembly are disclosed. One such component is a pointer which may be configured to indicate the disposition of another portion or component of the assembly. A rotary indexing device which may be configured to control or facilitate rotation of other components is also disclosed. Further, various components of an elongate instrument having flexible segments and operative segments are also disclosed. In some embodiments, the elongate instrument may comprise a biopsy assembly and may be used in connection with other components of the disclosed assembly.

The present application relates to the technical field of vascular interventional treatment instruments, and discloses a system and method for the selective laser ablation of restenosis after the treatment of Budd-Chiari syndrome, comprising a controller, a pulse emission module and a reference element built into a catheter, the system is based on the reference element for periodic self-calibration, collects and processes the associated photoacoustic signals to identify the tissue type, and then realizes the selective ablation of the diseased tissue and the boundary self-stop when the healthy tissue is touched. The present application converts the traditional open-loop energy delivery into a closed-loop self-control process with real-time information interaction capability, so that the ablation operation end can in-situ perceive the tissue boundary and realize autonomous stop, thereby avoiding the problem of damaging the healthy tissue due to uncontrollable energy application, improving the safety of the operation, and having the advantages of high precision, few complications, repeatable treatment and the like.

The invention relates to the technical field of interventional therapy, and particularly discloses a percutaneous puncture navigation system which comprises a camera module and a display module, the display module displays a main picture shot by the camera module, and an electronic protractor picture is suspended on the main picture as a floating layer; a puncture layer S, a puncture point A, a puncture angle alpha, a puncture depth D and a puncture target point T of a focus area of a patient are determined, a camera module is arranged on one side of the patient in the scanning direction, and the camera module aims at the body surface of the focus area to shoot, so that a round point O in a picture of the electronic protractor coincides with the puncture point A of the body surface of the patient; a datum line in an electronic protractor picture is parallel to the horizontal plane; the puncture needle coincides with the angle line of the angle alpha in the picture of the electronic protractor, and the puncture needle enters the depth D along the angle line alpha of the electronic protractor and then reaches the puncture target point T. The puncture cloth needle arranged as the puncture needle achieves the visual navigation function, reduces the puncture difficulty, improves the puncture precision and reduces the puncture scanning frequency.

The invention discloses a system and a method for detecting branch blood flow disorder in coronary artery bifurcation lesion interventional therapy. The system comprises a physiological signal acquisition unit, an angiography unit, a coronary intravascular ultrasound unit, a data processing and control unit and a display unit. The method is realized through the following steps: calculating baseline functional indexes and extracting baseline morphological parameters based on radiography and vascular ultrasound images before an operation; the method comprises the following steps: synchronously acquiring real-time radiography and ultrasonic images before and after key steps in an operation, and calculating real-time functional indexes and real-time morphological parameters according to the real-time radiography and ultrasonic images; fusing the real-time data with the baseline data, and calculating a comprehensive damage index; and according to whether the index exceeds a preset threshold, generating a graded early warning signal in real time. According to the method, image data which can be conventionally obtained in an operation is utilized, real-time fusion and quantitative evaluation of function and form information are achieved, objective decision support in the operation is provided for an operator, intervention opportunities can be accurately mastered, and the operation safety and curative effect are improved.

The invention belongs to the technical field of medical instruments, and particularly relates to a pneumology department bronchoscope interventional therapy device which comprises a pillow plate, and a mouth opening auxiliary assembly is arranged on the pillow plate; the mouth opening auxiliary assembly comprises a limiting rod fixedly connected to one side of the support, the lower end of the limiting rod is fixedly connected to the pillow plate, a lifting plate is slidably arranged on the limiting rod, a fixing ring is fixedly connected to the middle of the lifting plate, fixing plates are fixedly connected to the two sides of the fixing ring, and a telescopic plate is slidably arranged on one side of each fixing plate. One end of the telescopic plate is fixedly connected with a clamping plate; the fixing ring is further provided with a bronchoscope moving auxiliary assembly. According to the bronchoscope moving auxiliary assembly, in the examination process, the bronchoscope is limited among the multiple limiting balls, so that the bronchoscope cannot move uncontrollably in the oral cavity of a patient, bruise and bleeding caused by friction between the bronchoscope and the oral cavity are effectively avoided, and then pain and discomfort of the patient are relieved.

The present application relates to the technical field of medical devices, and discloses an interventional therapy delivery device. The interventional therapy delivery device comprises a tube body and an operating handle. The tube body is composed of an inner hypotube and an outer hypotube, and is fixed at a distal end by a cutting groove. The operating handle is provided with a base, a catheter seat, an adjusting knob, a threaded part, an adjusting knob rotating rod, a fine adjustment knob and a fine adjustment knob rotating rod. The axial movement of the outer hypotube is controlled by the threaded engagement of the adjusting knob to adjust the bending angle. The fine adjustment knob adjusts the bending direction by cooperating with the limiting block and the sliding groove. The present application improves the torque transmission efficiency, reduces the bending radius, simplifies the operation process, and thus improves the accuracy and operation flexibility in interventional surgery.

The utility model relates to the field of interventional therapy, and discloses a vena cava interventional valve. The vena cava interventional valve comprises a body support, the body support comprises an upper cone part, a barrel part and a lower cone part, and the upper cone part and the lower cone part are arranged at the two ends of the barrel part respectively; the fixing piece is arranged at the joint of the upper cone part and the barrel part; the covering film is arranged on the outer side of the body stent; and the artificial valve leaflet is arranged in the barrel part of the body bracket. The conveying size of an existing inferior vena cava filter is small and is only 6F, and the inferior vena cava filter is improved on the basis of the basic structure of the inferior vena cava filter, so that the inferior vena cava filter has the same small conveying size and fixing efficiency; by means of the fixing piece, positioning can be accurately and easily achieved in the valvular operation, and the pressing difficulty of the surgical operation is reduced; and the valve can be completely recovered before being completely released, so that the safety of the operation is improved.

The invention provides a controllable bending catheter for interventional therapy, and relates to the technical field of medical catheters. The controllable bending catheter for interventional therapy comprises a cannula, an adjusting assembly is installed on the cannula, the front portion of the adjusting assembly is in threaded connection with a large fastening ring, the front portion of the large fastening ring is in threaded connection with a stabilizing assembly, and a rear section assembly is fixedly installed in front of the stabilizing assembly. A plurality of middle section assemblies are installed in front of the rear section assembly, and a connecting outer pipe and a connecting inner pipe are installed between every two adjacent middle section assemblies. During use, the front section assembly is inserted into a human body, the front section assembly, the middle section assembly and the rear section assembly are in a non-forced connection state, the front section assembly, the middle section assembly and the rear section assembly can be conveniently inserted according to the human body structure, after insertion, the adjusting assembly and the large fastening ring can be rotated to tension the steel wire, and the front section assembly, the middle section assembly and the rear section assembly enter the forced connection state under the action of the steel wire to form a whole. And subsequent operation is facilitated.

The utility model discloses a balloon dilatation pressure pump for interventional therapy intraoperative nursing, which comprises a balloon dilatation pressure pump main body, the balloon dilatation pressure pump main body is provided with a fixing splint in a matching way, the fixing splint is arranged in a rectangular way, and the front side and the rear side of the fixing splint are respectively provided with an adjusting device and a pipeline fixing device. The fixing clamping plate is additionally arranged on one side of the disposable balloon dilatation pressure pump, and the disposable balloon dilatation pressure pump is fixed through the butt joint rod and the binding belt on the adjusting device, so that the disposable balloon dilatation pressure pump is convenient to assemble and disassemble, use of medical staff under various conditions is met, and the disposable balloon dilatation pressure pump is convenient to use. Meanwhile, the extrusion fixing clamp arranged on the rear side can fix the balloon dilatation pressure pump on a medical pipeline to assist in fixing the position of the balloon dilatation pressure pump.

The invention relates to the technical field of vascular interventional therapy instruments, and discloses an excimer laser ablation system and method for restenosis after Budd-Chiari syndrome interventional therapy, the excimer laser ablation system comprises a controller, a pulse transmitting module and a reference element arranged in a catheter, and the system performs periodic self-calibration based on the reference element; according to the method, associated photoacoustic signals are collected and processed to identify tissue types, selective ablation of lesion tissues and boundary self-stop when healthy tissues are touched are further achieved, traditional open-loop energy delivery is converted into a closed-loop self-control process with real-time information interaction capacity, and the method has the advantages of being simple in structure, convenient to operate and high in practicability. The ablation operation tail end can sense the tissue boundary in situ and achieve automatic stopping, so that the problem that healthy tissue is damaged due to uncontrollable energy application is solved, the safety of an operation is improved, and the advantages of being high in precision, few in complication, capable of achieving repeated treatment and the like are achieved.

The invention belongs to the technical field of medical instrument maintenance, and particularly relates to an interventional therapy medical instrument maintenance device and method.The interventional therapy medical instrument maintenance device comprises a disinfection maintenance cabinet, a sealing end cover is movably clamped to the middle of the back face of the disinfection maintenance cabinet through a hinge, and a bearing bottom cover is fixedly installed on the lower surface of the disinfection maintenance cabinet; the inner wall of the bearing bottom cover is of a hollow structure, a conical isolation piece is movably connected to the upper surface of the bearing bottom cover in a clamped mode, a connecting groove is formed in the middle of the lower surface of the conical isolation piece, and a stretching mechanism is connected into the inner arc face of the connecting groove in a penetrating mode. One side of the medical instrument cleaning device is provided with a cleaning device, the complex structure of the medical instrument is deepened, efficient sterilization, peculiar smell removal and low-temperature protection are achieved, the other side of the medical instrument cleaning device adopts a chemical agent spraying mode to clean dirt, agents are accurately matched for instruments made of different materials to achieve disinfection and material protection, and the differentiated and complementary maintenance mode is adopted for all links from cleaning, disinfection to material protection.

The invention discloses a reverse micro-catheter for interventional therapy, which comprises a catheter main body provided with a through consumable channel for an interventional consumable to pass through, a plurality of restraining cavities are arranged in the catheter wall of the catheter main body along the axial direction parallel to the catheter main body, and the restraining cavities are distributed along the circumferential direction of the catheter main body; at least part of the elastic piece is located in the restraining cavity and is in sliding connection with the restraining cavity, and the far end of the elastic piece has an initial state restrained by the restraining cavity and an expansion state in which the elastic piece is separated from restraining and expands under the action of self elasticity; the elastic sleeve is arranged at the far end of the catheter body, the far end of the elastic piece is configured to extend into the elastic sleeve in an operable mode, and in the expansion state, the elastic piece stretches the elastic sleeve and enables the elastic sleeve to expand outwards. According to the microcatheter, a stable axial guide channel can be formed, the forward guide wire can be conveniently led into the reverse microcatheter, the inner space of the catheter body is released to the maximum extent through the restraining cavity formed in the catheter wall, and the effective diameter of the consumable channel is remarkably increased.

The utility model relates to the technical field of medical instruments, in particular to a guide catheter assembly which comprises a plurality of layers of sleeve parts, the sleeve parts are thinned step by step from the first step to the Nth step and are sequentially nested, each sleeve part comprises a catheter body, the near end of each catheter body is provided with an operation handle used for controlling the corresponding sleeve part, and the operation handle is connected with the corresponding sleeve part. The far end of the catheter body is in a bent shape relative to the catheter body, and the far end of the catheter body from the first step to the Nth step has the same or different preset curvatures; and the interventional instrument can penetrate through the Nth-step sleeve piece so as to reach the target far-end blood vessel under the guidance of the multi-layer sleeve piece. According to the scheme, the defects that in the prior art, due to the fact that a guiding catheter is not matched with a pulmonary artery anatomical structure, the operation difficulty is large, time is long, and radiation exposure is large are overcome, and an interventional access is rapidly built in interventional therapy with complex and bent blood vessels.

The invention discloses an interventional therapy liquid transmission auxiliary device, and relates to the technical field of medical infusion instruments.The interventional therapy liquid transmission auxiliary device comprises a needle head, a needle handle fixedly installed at the liquid inlet end of the needle head and an infusion tube fixedly installed on one side of the needle handle and used for infusing liquid into the body of a patient, and the needle head is communicated with the infusion tube through the needle handle; an antibacterial assembly is arranged at one end of the needle handle, and a blocking assembly is arranged on one side of the antibacterial assembly; the antibacterial assembly comprises a holding tube which is flexibly connected to the end part of the needle handle and a telescopic tube which is fixedly arranged at one end of the holding tube; the blocking tube is fed into the needle head, the pressing clamp is used for clamping the air bag to enable air in the air bag to enter the blocking tube, the blocking tube blocks the needle head after being inflated, the effect of sealing the interior of the needle head is achieved, blood in a blood vessel is prevented from flowing back into the needle head, and the problem that blood clots are likely to be generated due to the fact that blood does not flow in the needle head is solved.

The invention discloses an extended catheter, which belongs to the technical field of interventional therapy instruments and comprises a push rod and a catheter connected to the far end of the push rod. The catheter comprises a catheter near-end section and a catheter far-end section, the catheter far-end section is located at the farthest end of the catheter, the diameter of the catheter far-end section is smaller than that of the catheter near-end section, and the outer wall of the catheter far-end section is provided with a flow guide groove which is concave inwards. The catheter far-end section with the reduced outer diameter is arranged at the farthest end of the catheter, so that the catheter can conveniently pass through a small and narrow blood vessel; the outer tube wall of the far-end section of the catheter is provided with the flow guide groove which is concave inwards, and in the operation process, when the outer tube wall of the far-end section of the catheter is attached to the wall of a blood vessel, blood in the blood vessel can flow towards the far end along the flow guide groove, so that the phenomenon that local blood pressure is too high due to blockage of the blood vessel is avoided, and damage to a human body caused by long-time blocking of the blood vessel by the catheter is avoided; therefore, the catheter can be safely inserted into a narrow blood vessel deeper in the body.

The utility model provides an ultrasonic detection device and a medical system. The ultrasonic detection device comprises an insertion end inserted into the detected cavity in the insertion direction, an optical assembly and an ultrasonic assembly are arranged in the insertion end, and the ultrasonic assembly receives ultrasonic signals to form an ultrasonic imaging area. Light rays emitted from the optical assembly penetrate through the ultrasonic imaging area and penetrate through the detected cavity to form a visible optical marking area on the outer wall surface of the detected cavity. When the ultrasonic detection device is used for ultrasonic-assisted interventional therapy, a doctor can observe the outer wall surface of the detected cavity and can deduce the positions of the insertion end and the lesion area of the ultrasonic detection device by searching the position of the visible optical mark area on the outer wall surface; a doctor can more conveniently and noninvasively position the insertion end and the lesion area, and the positioning can be more accurate.