62 results about "Ventricle" patented technology

The invention discloses an accurate regulation and control instrument for ventricular drainage, and relates to the technical field of neurosurgical medical equipment, the accurate regulation and control instrument for ventricular drainage comprises a fish-shaped clamp, the clamp is formed by connecting symmetrical arc-shaped clamping blocks through a rotating shaft, the inner wall of the clamp is provided with a fixing groove and an arc-shaped air bag I, and the air bag I is embedded with a flow sensor and is provided with semispherical anti-skid grains; the clamp is matched with an elastic plate to form fixation, a controller, an air pump and an electromagnetic valve are arranged on the side portion of the clamp, a second pressing type air bag is additionally arranged, an air path is matched with a pressure gauge, and all the components are in signal connection with the controller. During work, the first air bag is inflated to flexibly extrude the drainage tube, the flow sensor collects data in real time, and the controller is linked with the air pump and the electromagnetic valve to regulate and control the opening degree of a tube cavity in a closed loop mode so as to accurately control flow. Continuous drainage is guaranteed through double-mode air supply, operation is convenient through a convenient clamping structure, the precision is high, the device is suitable for drainage tubes of multiple specifications, the medical care load is reduced, and the clinical treatment safety and continuity are improved.

The invention relates to an instrument for transferring cerebrospinal fluid in a ventricle into a body cavity of other parts of a human body, and particularly discloses a cerebrospinal fluid drainage catheter component and a drainage system.The cerebrospinal fluid drainage catheter component comprises a catheter body, a plurality of rows of main long holes which extend in the circumferential direction and are distributed at intervals in the axial direction are formed in the wall of the catheter body, and a plurality of drainage holes are formed in the main long holes; a plurality of protruding parts are arranged on the two linear hole walls of the main long hole so that the main long hole can be divided into a plurality of micro holes. The pipe wall occupied by each row of main long holes is a first section, and the pipe wall between each two adjacent rows of main long holes is a second section; the driving component is used for driving one of every two adjacent second sections to axially move relative to the other second section, so that one end, in the circumferential direction, of the main long hole axially moves relative to the other end of the main long hole, and the two linear hole walls of the main long hole generate relative dislocation movement in the circumferential direction; therefore, the protruding part disturbs the interior of the main long hole.

This invention discloses a method for constructing an early prediction model of hydrocephalus secondary to intraventricular tumors based on the dynamic changes of inflammatory factors after surgery, belonging to the field of medical data processing and model construction. The method includes: acquiring the concentration values ​​of inflammatory factors and the hydrocephalus outcome of biological samples at multiple postoperative time points; calculating quantitative characteristic parameters characterizing the dynamic evolution of the inflammatory response, such as the dynamic change rate, cumulative load, and acceleration, based on the concentration values; and training a deep learning model using the quantitative characteristic parameters and clinical baseline data as input features, with the hydrocephalus outcome as the label. This invention achieves early quantitative warning of hydrocephalus risk, significantly improving the accuracy, sensitivity, and specificity of prediction. It solves the technical problem of existing technologies relying on post-operative monitoring methods such as imaging and lacking early biochemical warning capabilities.

The application relates to a perfusion guide device, a method, a ventricular assist system, a storage medium and equipment for a ventricular assist device, which comprises a pressure detection module, a state judgment module and an auxiliary confirmation module, wherein the pressure detection module is used for detecting the pipeline pressure after at least one pipeline exhaust operation is completed, the state judgment module is used for comparing the detected pressure value with a preset threshold value to identify the leakage or blockage state of the pipeline, and the auxiliary confirmation module is used for instructing to disconnect the connection between the perfusion pump and the catheter pump when it is confirmed that the reason for excluding the pipeline blockage cannot be confirmed, and is also used for controlling the infusion motor to drive the perfusion pump to operate at a preset rotating speed for a preset auxiliary confirmation time period, and judging whether the blockage is located in the perfusion pump pipeline or the catheter pump pipeline based on whether the measured pressure value during the operation exceeds the preset threshold value.

The application provides a pump shell, which comprises a first shell, a second shell and an assembling part, the second shell is connected with the first shell to form a receiving cavity capable of receiving an impeller, at least one of the first shell and the second shell is provided with a groove with an opening facing the receiving cavity, the groove has a first side surface, the assembling part comprises a connecting assembling surface and a second side surface; the assembling part is accommodated in the groove, the assembling surface can be opposite to the surface of the impeller received in the receiving cavity, and the second side surface is in contact with the first side surface.The pump shell provided by the application is installed on at least one of the first shell and the second shell through the additionally provided assembling part, thus the first shell, the second shell and the assembling part can be machined respectively, the flatness of the assembling surface can be controlled, the basis for the substantial improvement of the flatness of the assembling surface is provided, and the thrombus can be avoided on the basis of improving the overall operation accuracy of the ventricular assist device.The application further provides a pump body and a ventricular assist device.

The present application discloses a ventricular assist system, a flushing method, a consumable material, a control apparatus, and a control device for a medical catheter pump system, and belongs to the technical field of medical devices. In the ventricular assist system, the first three-way valve includes a first valve port, a second valve port, and a third valve port, wherein the first valve port is connected to a first flushing path driven by the flushing pump assembly, and the second valve port is connected to a first flushing interface of the medical catheter pump; the second three-way valve includes a fourth valve port, a fifth valve port, and a sixth valve port, wherein the fourth valve port is connected to a second flushing path driven by the flushing pump assembly, and the fifth valve port is connected to a second flushing interface of the medical catheter pump.

This application relates to ventricular assist devices. Described herein are devices and methods, including a blood pump (20) configured to be placed within a body of a subject, the blood pump including an impeller (50) and a frame (34) disposed about the impeller, the impeller including proximal and distal bushings (64, 58), the frame including proximal and distal bearings (116, 118). An axial shaft (92) passes through the proximal and distal bearings (116, 118) of the frame and the proximal and distal bushings (64, 58) of the impeller (50). The impeller (50) defines a radially constrained configuration in which the impeller (50) is introduced into the body of the subject and a non-radially constrained configuration in which the impeller (50) is configured to pump blood within the body of the subject. The impeller (50) changes from its radially constrained configuration to its non-radially constrained configuration by sliding the distal bushing (58) over the axial shaft (92). Other applications are also described herein.

The utility model provides a ventricular puncture auxiliary support, and relates to the ventricular puncture support field, the ventricular puncture auxiliary support comprises a locking assembly, the top of the locking assembly is fixedly connected with a puncture needle guide groove, the puncture needle guide groove is used for guiding a puncture needle, the surface of the locking assembly is also provided with three positioning assemblies, the number of the positioning assemblies is three, and the positioning assemblies are used for positioning the ventricular puncture auxiliary support. The locking assembly is arranged on the positioning assembly and used for positioning the double ear canals and the eyebrow arch respectively, the locking assembly comprises a fixing block, a first guide hole, a second guide hole, a first threaded hole and a first fastening bolt, and the first guide hole and the second guide hole are used for guiding the positioning assembly; by arranging the guide rail, the positioning block, the sliding groove, the second threaded hole and the second fastening bolt, the effect of positioning the puncture position is achieved, the connecting line of the left ear canal and the right ear canal and the positioning of the eyebrow arch can be achieved through the cooperation of the three positioning assemblies, and therefore deviation of the puncture position can be prevented, and the puncture accuracy is improved. And the success rate of puncture is effectively improved.

The invention relates to a blood pump controller and a ventricular assist system. The blood pump controller comprises a controller body, a connector assembly and a rotation stopping piece. The controller body is provided with an interface. The connector assembly comprises a connector and a connecting piece, the connector can be inserted into the connector, one end of the connector is used for being electrically connected with the blood pump, the connecting piece can be rotationally arranged at the other end of the connector, and the connecting piece rotates relative to the connector so that the connecting piece can be clamped with or separated from the controller body. And the connector can be prevented from being separated from the interface when the connecting piece is clamped with the controller body. The rotation stopping piece is connected with the connecting piece and rotates synchronously with the connecting piece, and the rotation stopping piece can abut against the controller body so as to prevent the connecting piece from continuously rotating relative to the connector in the direction separated from the controller body. According to the blood pump controller, the connection reliability of the connector assembly and the controller body can be improved, and the risk that the blood pump controller is disconnected from the blood pump is reduced.

The application provides a brain cortex thickness morphological analysis method and system of MR images, and relates to the technical field of medical image data processing.The method comprises the following steps: obtaining a head three-dimensional high-resolution magnetic resonance T1 weighted image sequence of a patient with intractable epilepsy to be evaluated; performing bias field correction and brain tissue stripping on the image sequence to construct an initial brain parenchyma three-dimensional voxel model containing individual lateral ventricle expansion morphological characteristics; based on the initial brain parenchyma three-dimensional voxel model, extracting an initial isosurface of the interface between gray matter and white matter; calculating a local curvature tensor for a deep brain sulcus region in the initial isosurface; performing topological defect repair and mesh smoothing on the initial isosurface according to the local curvature tensor to obtain an individualized cortex surface mesh model eliminating ventricle expansion deformation artifacts.The application realizes accurate registration of image space and surgical physical space.

This application relates to a ventricular connection mechanism and a ventricular assist system. The ventricular connection mechanism includes a suture ring, a clamping assembly, and a stop. The clamping assembly includes an annular disk and a clamping ring. The annular disk has a first opening, and the clamping ring is fixedly connected to the annular disk. The clamping ring has a second opening, the position of which corresponds to the position of the first opening. The size of the second opening is adjustable to adjust the inner diameter of the clamping ring. The stop is connected to the annular disk, and the position of the stop corresponds to the position of the first opening, so that the stop and the annular disk together form a closed annular structure. A fixing structure is provided on the annular structure, which can fix the annular structure to the suture ring. The fixing structure is arranged around the inner hole of the suture ring. The above-described ventricular connection mechanism and ventricular assist system can reduce the probability of blood leakage from the opening of the annular disk and the gap between the suture ring and the annular disk.

This application discloses a blood pumping device and a ventricular assist system. The blood pumping device includes a motor and an infusion tube. The motor includes a housing, a rotor assembly, and a distal end cap. The housing encloses a receiving cavity, and a first flow passage is provided inside the housing. The distal end cap is connected to the distal end of the housing and has a first shaft hole extending axially. The rotor assembly includes a rotating shaft, at least a portion of which extends out of the receiving cavity through the first shaft hole. The gap between the rotating shaft and the contour surface of the first shaft hole forms a second flow passage, which communicates with the first flow passage. The infusion tube is connected to the proximal end of the motor and has a third flow passage communicating with the first flow passage. The flow rates Q1 of the first flow passage, Q2 of the second flow passage, and Q3 of the third flow passage satisfy the formula where k1∈(0,2], k2∈(0,2], k3∈(0,2], Q x ∈[10, 50].

This invention provides a pump housing comprising a first housing, a second housing, and an assembly. The second housing is connected to the first housing to form a receiving cavity capable of accommodating an impeller. At least one of the first and second housings has a groove with an opening facing the receiving cavity. The groove has a first side annular surface. The assembly includes a connected mounting surface and a second side annular surface. The assembly is accommodated in the groove, with the mounting surface facing the surface of the impeller housed within the receiving cavity, and the second side annular surface contacting the first side annular surface. The pump housing provided by this invention, by additionally providing the assembly to be installed in at least one of the first and second housings, allows for separate processing of the first housing, the second housing, and the assembly. This enables control over the flatness of the mounting surface, providing a basis for significant improvement in the flatness of the mounting surface and preventing thrombosis while improving the overall operational accuracy of the ventricular assist device. This invention also provides a pump body and a ventricular assist device.

The application discloses a ventricle puncture drainage puncture auxiliary device, which comprises a reference element and a puncture needle ring fastener, the reference element and the puncture needle ring fastener are both center-aperture sheet structures, the reference element is fixed on the head, and the puncture needle ring fastener is axially coincident with the center aperture of the reference element and has a diameter difference of less than 1 mm. The puncture needle ring fastener extends an extension part with a bending structure, the reference element is provided with a groove matched with the extension part, and the extension part and the groove are matched to form a fixed structure to connect and fix the reference element and the puncture needle ring fastener. The reference element can be fixed according to the puncture position, the puncture needle ring fastener is adjusted in angle to assist puncture after the aperture is opened, and the puncture needle ring fastener ensures the stability of puncture. The puncture needle ring fastener can also be matched with the skull aperture drill ring fastener to be applicable to guarantee the bacteria isolation effect in the puncture drainage process and avoid intracranial infection.

This invention relates to a device for transferring cerebrospinal fluid (CSF) from the ventricles of the brain to body cavities in other parts of the human body. Specifically, this invention discloses a CSF drainage catheter component and a drainage system. The CSF drainage catheter component includes: a catheter body with multiple rows of main long holes arranged circumferentially and axially spaced on its wall; multiple protrusions on the two linear holes of the main long holes to divide the main long holes into multiple micropores; the wall occupied by each row of main long holes is a first segment, and the wall between each two adjacent rows of main long holes is a second segment; a driving component for driving one of the two adjacent second segments to move axially relative to the other second segment, so that one end of the main long hole moves axially relative to the other end in the circumferential direction, thereby causing the two linear holes of the main long hole to move relative to each other in the circumferential direction, thereby causing the protrusions to disturb the interior of the main long hole.

The utility model relates to a height-adjustable drainage fixing device and a drainage system. The drainage fixing device comprises a long shaft, a fixing piece, a positioning piece and a connecting piece, the long shaft is a long strip body; buckle holes are formed in the long shaft, and the multiple buckle holes are distributed in the length direction of the long shaft; a fixing needle is arranged on the fixing piece; the long shaft penetrates through the fixing piece, and the fixing needle on the fixing piece penetrates through the buckle hole. The upper end of the long shaft is reversely folded and then is connected with the fixing piece; the positioning piece is connected with the long shaft; the connector is connected to the lower end of the long shaft; a connecting hole is formed in the connecting piece and used for being connected with a ventricular drainage bag. The drainage system comprises the drainage fixing device. Compared with the prior art, by arranging the long shaft and the fixing piece, the height is convenient to adjust, the height adjustment is more accurate compared with direct hanging of articles such as gauze and strings, safer and more stable connection can be achieved by arranging the connecting piece, and the positioning piece is arranged, so that the height adjustment is more convenient. And the zero scale and the external auditory meatus opening of the patient can be positioned at the same horizontal position.

The application discloses a detachable leadless pacemaker system which can pace cardiac conduction bundle. The specific embodiment of the system comprises: a detachable leadless pacemaker, the detachable leadless pacemaker is provided with a first data interface; a passive leadless pacemaker, the passive leadless pacemaker is provided with a second data interface; a signal line, which is connected with the first data interface and the second data interface respectively, so as to realize power supply of the detachable leadless pacemaker for the passive leadless pacemaker and data communication between the two. The detachable leadless pacemaker can be arranged in a ventricle to realize atrioventricular dual chamber pacing with the passive leadless pacemaker arranged in an atrium. An unpackaged circuit can be arranged in the passive leadless pacemaker, which is used as an electrode carrier for sensing atrial electrical signals and implementing electrical stimulation. The detachable leadless pacemaker and the passive leadless pacemaker are connected by a tensile-resistant reinforcing line, which is used for recovery operation when the detachable leadless pacemaker is repositioned.

This application provides a method for measuring fetal ventricular ratio and an ultrasound imaging system. The method is applied to an ultrasound imaging system, which includes a processor. The processor acquires an ultrasound image of a cross-section of the fetal lateral ventricle; the processor determines the midline of the brain based on the ultrasound image of the cross-section of the lateral ventricle; the processor acquires a first farthest point on the lateral wall of the lateral ventricle in the ultrasound image that is farthest from the midline of the brain, and acquires the length of a first perpendicular line from the first farthest point to the midline of the brain; the processor acquires a second farthest point on the medial side of the skull in the ultrasound image that is farthest from the midline of the brain, and acquires the length of a second perpendicular line from the second farthest point to the midline of the brain; the processor determines the fetal ventricular ratio based on the lengths of the first and second perpendicular lines. This application improves the efficiency of doctors and increases the accuracy of the obtained ventricular ratio.

The utility model discloses a balloon catheter with a special-shaped guide wire, which comprises a guide tube, an expansion balloon is fixedly connected outside the guide tube, the expansion balloon is connected and communicated with the guide tube, the guide wire is fixedly mounted inside the guide tube, the guide wire comprises a guide wire main body, and the guide wire main body is provided with a guide hole. A stepless variable-diameter guide wire is fixedly connected to the front part, the head part of the stepless variable-diameter guide wire is arranged in a double-bend shape, and the head part of the stepless variable-diameter guide wire is provided with a first bend and a second bend. The design of the electrode variable-diameter guide wire provides gradually-changed rigidity and flexibility, particularly, the double-bend design of the head comprises the first bend and the second bend, so that the flexibility of the guide wire is enhanced, the double-bend structure can avoid excessive linear stretching when the guide wire passes through a zigzag blood vessel or ventricle, friction force between the guide wire and the blood vessel wall is reduced, and the guide wire is more flexible. Therefore, the adaptability of the guide wire and the trafficability of the guide tube are improved.

The application discloses a marker-free anti-occlusion ventricle and intracranial hematoma puncture AR navigation method and system based on monocular vision, and belongs to the technical field of medical augmented reality. The method comprises the following steps: acquiring a preoperative three-dimensional medical image model of a patient; collecting a video in real time by using a monocular camera of a consumer-level device, and constructing a three-dimensional model of the body surface of the patient by using a three-dimensional reconstruction algorithm such as neural rendering; eliminating visual interference such as a surgical drape and strong light reflection by using an optical correction technology; adopting a time sequence hybrid registration mechanism comprising a global locking period, an inertial maintenance period and a local correction period, so as to accurately align the reconstructed model with the image model, and realize continuous tracking when the visual signal is lost; and finally generating an augmented reality view for navigation. The method does not need an external tracker and a surgical marker, and can realize high-precision, anti-occlusion and real-time navigation by using a portable device, so that the cost and use threshold of surgical navigation are significantly reduced, and the method has a very high clinical application value.

The invention relates to an impeller and a ventricular assist device. The impeller comprises an impeller body, an end cover and a pressing ring. Wherein an accommodating groove is formed in the end part of the impeller main body; the end cover comprises an annular cover plate, and the annular cover plate is arranged in the containing groove in a covering mode. The annular cover plate is provided with an inner circumferential part and an outer circumferential part; a central hole is defined at the periphery of the inner ring; the periphery of the outer ring is fixedly connected with the impeller main body; the pressing ring is at least partially located in the center hole and fixedly connected with the impeller body. The pressing ring is provided with a first limiting face, the first limiting face is located on one side of the impeller body in the axial direction, and at least part of the inner ring periphery of the annular cover plate is clamped between the first limiting face and the impeller body. According to the impeller, the end cover can be reliably fixed to the impeller body, so that the risk that the end cover is separated from the impeller body when the impeller rotates is reduced.

The application provides a clamping mechanism, comprising a clamping ring and a locking assembly, the clamping ring comprising a ring body and a limiting buckle ear, the ring body being provided with a gap, the ring body having opposite first and second ends, the first and second ends being spaced apart to form the gap; the limiting buckle ear being arranged at the first end, the limiting buckle ear being provided with a limiting buckle hole. The locking assembly comprises a handle and a connecting arm, the handle being rotationally connected to the second end; one end of the connecting arm being rotationally connected to the handle, the other end being provided with a movable buckle ear, the movable buckle ear being buckled with the limiting buckle ear and being movable in the limiting buckle hole; the handle being rotatable to drive the movable buckle ear of the connecting arm to move in the limiting buckle hole, so as to adjust the distance between the first and second ends and the inner diameter of the ring body. The clamping mechanism provided by the application is buckled with the movable buckle ear and the limiting buckle ear, so that the operator can directly drive the connecting arm to move by rotating the handle, thereby improving the operation convenience of the clamping mechanism. The application also provides a ventricular assist system.

The application discloses a mitral valve replacement prosthesis and an outer support thereof, and belongs to the field of heart valve replacement prostheses. The outer support comprises, from top to bottom, an atrial fixation section located in an atrium, a mitral valve annulus blocking section and a mitral valve replacement prosthesis inner support connecting section located in a ventricle. The upper edge of the atrial fixation section and the lower edge of the inner support connecting section are circular or quasi-circular. The cross section of the mitral valve annulus blocking section is a wavy D-shaped structure. The connecting rods in the inner support connecting section comprise at least one wavy connecting rod. At least two identical or two different mark points are arranged on the petal structure of the atrial fixation section. The wavy D-shaped structure and the wavy rectangular structure are arranged, so that the circumferential rotation and the up-and-down displacement are effectively prevented, and the service life of the prosthesis is improved. The elastic wavy connecting rod is arranged, so that the production and processing success rate is improved and the service life is prolonged. The mark points are increased, so that the prosthesis is more easily identified during surgery, and the surgery efficiency and success rate are improved.

The present application relates to a device for transferring cerebrospinal fluid in the ventricle to the body cavity of other parts of the human body, and specifically discloses a device for draining water in the ventricle, which comprises a base for being attached to a bone window of a skull, a flow collection cavity arranged on the base, a liquid outlet connector in communication with the flow collection cavity, and a flow guide hose connected to the liquid outlet connector; a tip axially away from the base; a drainage main component for guiding cerebrospinal fluid in the ventricle to the flow collection cavity; the drainage main component comprises a plurality of micro-catheters; the proximal end and the distal end of each micro-catheter are respectively attached to the base and the tip, and the micro-central hole of each micro-catheter is in communication with the flow collection cavity at the proximal end; all the micro-catheters are arranged in multiple circles in the circumferential and radial directions; the micro-catheter wall of each micro-catheter is provided with a micro-drainage structure penetrating the micro-central hole, and the micro-drainage structure is arranged in the circumferential and axial directions of the micro-catheter wall to allow cerebrospinal fluid to enter the micro-central hole through the micro-catheter wall.

A mechanical circulatory support system may include a blood pump and an elongate shaft coupled to the blood pump. The blood pump may be configured to extend into a ventricle of a heart of a patient. The elongate shaft may be configured to be pulled through an aorta of the patient and into an axillary artery of the patient while the blood pump is in the heart of the patient. The blood pump may be a large-bore blood pump. The elongate shaft may be detachable from the blood pump. The elongate shaft extending through the axillary artery of the patient may be coupled with a controller configured to operate the blood pump while the patient is ambulatory.

The application relates to a perfusion liquid conveying device and a ventricular assist system. The perfusion liquid conveying device comprises a base, a rotating shaft, a bearing assembly and a buffer assembly, the base is internally provided with a perfusion channel, the bearing assembly comprises a plurality of bearings, the inner ring and the outer ring of the bearing have a flow gap therebetween, the buffer assembly is provided with a reflux cavity, the perfusion channel is an inflow channel of perfusion liquid, the perfusion liquid mixes with refluxed blood in the perfusion channel to form mixed liquid, the mixed liquid passes through the flow gap and the reflux cavity to be refluxed, part of the reflux cavity extends in the axial direction, and part of the reflux cavity extends in a first direction. The reflux cavity itself constitutes a zigzag loop, the reflux cavity can form a buffering effect on the mixed liquid, the flow of the mixed liquid in the perfusion liquid conveying device is inhibited, thereby the reflux of blood to the perfusion liquid conveying device is inhibited, the structural damage problem of the perfusion liquid conveying device caused by the reflux of blood is improved, and the working reliability of the perfusion liquid conveying device is improved.

A mechanical circulatory support system may include a blood pump and an elongate shaft coupled to the blood pump. The blood pump may be configured to extend into a ventricle of a heart of a patient. The elongate shaft may be configured to be pulled through an aorta of the patient and into an axillary artery of the patient while the blood pump is in the heart of the patient. The blood pump may be a large-bore blood pump. The elongate shaft may be detachable from the blood pump. The elongate shaft extending through the axillary artery of the patient may be coupled with a controller configured to operate the blood pump while the patient is ambulatory.

The application provides a multi-modal head image registration method based on stable markers, aiming at solving the problems of insufficient spatial alignment accuracy between multi-modal medical images and poor robustness of traditional registration methods in cross-modal scenarios. The method adopts a multi-anatomical marker cascade strategy, realizes accurate registration from local to global through dual stable anatomical structures of ventricle and skull. The method covers S1. acquiring a multi-modal head image dataset; S2. preprocessing the image data; S3. extracting the septum pellucidum cavity and the frontal horn of the lateral ventricle in the head ventricle as the first level marker points; S4. local registration based on the ventricle marker points, obtaining a primary transformation matrix and applying it to the global image; S5. extracting the frontal pole, occipital pole and longitudinal fissure of the brain in the head skull as the second level marker points; S6. local registration based on the skull marker points, obtaining a refined transformation matrix and applying it to the global image; S7. calculating the registration accuracy evaluation index to verify the registration effect. The application uses two types of anatomical structures with stable morphology and high contrast in cross-modal imaging, i.e. ventricle and skull, as the registration reference, and gradually optimizes the spatial transformation through the cascade registration strategy, which significantly improves the registration accuracy and robustness of multi-modal head images, and provides a reliable spatial alignment basis for subsequent clinical diagnosis, treatment planning and image analysis.

The invention discloses a neurosurgery ventricular puncture positioning external fixing frame, and relates to the technical field of medical equipment, in particular to a neurosurgery ventricular puncture positioning external fixing frame which comprises an arc-shaped positioning base, a bonding layer is arranged at the lower end of the arc-shaped positioning base, an elastic bandage is arranged at the side end of the arc-shaped positioning base, and the arc-shaped positioning base is used for being fixed to the head of a patient. The upper end of the base is provided with a sliding guide rail sliding in the direction of the center line or the coronary seam, and the guide rail is fixed through a locking structure. The inner side of the guide rail is connected with a puncture needle fixing sleeve through an angle adjusting clamp, and the angle adjusting clamp can adjust and lock the angle of the puncture needle, so that the puncture needle can be accurately aligned with target positions such as an external auditory canal connecting line, a hairline or a position 2cm in front of a coronary suture and a position 3cm beside a midline. A replaceable elastic lining is arranged in the puncture needle fixing sleeve so as to be matched with puncture needles of different specifications. A scale area is arranged on the surface of the base, and the angle adjusting clamp is integrated with an angle dial, so that accurate positioning and reproduction are facilitated. The device is stable in structure, easy and convenient to operate and capable of effectively improving the puncture precision and safety.

The utility model relates to a blood pump and a ventricular assist system. The blood pump comprises a cannula assembly, an impeller and a driving unit. The cannula assembly includes a proximal tube having a proximal opening; the impeller is rotatably arranged in the intubation tube assembly; the driving unit comprises a pump shell and a rotating shaft, the rotating shaft is rotatably installed on the pump shell, the rotating shaft penetrates through the pump shell and is provided with a connecting end contained in the near-side pipe, and the connecting end is fixedly connected with the impeller; the proximal tube has a tube outer diameter D1w, the pump housing has a housing outer diameter D2w, and D2w < D1w. According to the blood pump, the minimum inner diameter of the guide sheath is reduced by reducing the outer diameter of the pump shell, the guide sheath with the small inner diameter can be used for assisting in pushing the blood pump, the pushing difficulty of the guide sheath in the body of a patient is reduced, then the difficulty of interventional operation of the blood pump is reduced, and the operation duration is shortened.