72 results about "Ventricle" patented technology

Disclosed is an apparatus and method for uniform selective cerebral hypothermia. The apparatus includes a brain-cooling probe, a head-cooling cap, a body-heating device and a control console. The brain-cooling probe cools the cerebrospinal fluid within one or more brain ventricles. The brain-cooling probe withdraws a small amount of cerebrospinal fluid from a ventricle into a cooling chamber located ex-vivo in close proximity to the head. After the cerebrospinal fluid is cooled it is then reintroduced back into the ventricle. This process is repeated in a cyclical or continuous manner. The head-cooling cap cools the cranium and therefore cools surface of the brain. The combination of ventricle cooling and cranium cooling provides for whole brain cooling while minimizing temperature gradients within the brain. The body-heating device replaces heat removed from the body by the brain-cooling probe and the head-cooling cap and provides for a temperature difference between the brain and the body where the brain is maintained a temperature lower than the temperature of the body.

The invention relates to disposable device for the continuous centrifugal separation of a physiological fluid. The inventive device comprises: a fixed axial element; a centrifugation chamber which is mounted such that it can rotate around the axis of said element; an inlet channel for the blood to be centrifuged, the dispensing port of which is located close to the base of the chamber; and an outlet passage for a separated constituent, the inlet port of which is located close to the other end of the chamber in a concentrated area of one of the separated constituents having the lowest mass density in order for same to be removed continuously. The above-mentioned chamber takes the form of a long tube. The fixed axial element comprises a second outlet passage for a second of the separated constituents, the inlet port of which is located close to the end of the chamber opposite the above-mentioned base in a concentrated area of said second separated constituent having the highest mass density in order for same to be removed continuously.

The invention discloses a craniocerebral operation training simulation model comprising a simulation skull bottom and a simulation skull top cover. The simulation skull bottom and the simulation skulltop cover are detachably connected to form a simulation skull cavity. A simulated ventricle, a simulated brain tissue, a simulated subarachnoid space, a simulated dura mater and a simulated cerebralhematoma are arranged on the inner side of the simulated skull cavity; and a simulation blood vessel is arranged at the bottom of the inner side of the bottom of the simulation skull. According to theinvention, various structures, including skull, dura mater, subarachnoid space, blood vessels, hematoma, ventricle and the like, of the brain of a cerebral hemorrhage patient can be simulated; so that the simulated surgery of cerebral hemorrhage is close to actual operation in the aspects of image interpretation, operation path design, hematoma positioning, skull drilling, bone window forming, dura mater incision, hematoma puncture, hematoma flushing and drainage, channel implantation, microscope or endoscope hematoma removal and the like as much as possible, various simulated operation operations are performed on the model, and various operation skills of cerebral hemorrhage treatment of clinicians are trained.

Various embodiments provide an apparatus, system method for treating neurological conditions by delivering solid form medication to the ventricles or other areas of the brain. Particular embodiments provide an apparatus and method for treating epilepsy and other neurological conditions by delivering solid form medication to ventricles in the brain wherein the medication is contained in a diffusion chamber so as to allow the medication to dissolve in the cerebrospinal fluid of the brain and then diffuse out of the diffusion chamber to be delivered to the ventricles and brain tissue. In one or more embodiments, portions of apparatus have sufficient flexibility to conform to the shape of the ventricles of the brain when advanced into them and/or to not cause deformation of the ventricle sufficient to cause a significant physiologic effect.

The invention discloses an intracranial pressure monitoring method and device. The monitoring method comprises the steps that a pressure sensor is connected with a pressure measuring probe, and a pressure transmission path from a thin film to the pressure sensor is formed; the pressure measuring probe is implanted into the ventricle of a patient, and intracranial pressure is conducted to the thinfilm of the pressure measuring probe by using cerebrospinal fluid in the ventricle; the cerebrospinal fluid pressure change is converted into a grating signal through the pressure sensor; the gratingsignal is transmitted to a photoelectric analysis module through an optical fiber, so that the photoelectric analysis module converts the grating signal into an electric signal; and digital-to-analogue conversion is carried out on the electric signal to obtain a pressure waveform representing the intracranial pressure and the pressure waveform is displayed. Operation such as drainage can be carried out while monitoring is carried out, due to the fact that the size of the pressure measuring probe is relatively small, and meanwhile an optical fiber sensor and the corresponding optical fiber arerelatively thin, drilling insertion of the pressure measuring probe can be achieved, detection is carried out according to the medium conduction principle, the principle of a communicating vessel is not needed, operation is easy, and cerebrospinal fluid drainage can be carried out synchronously.

The invention belongs to the technical field of medical instruments, and particularly relates to a ventricular drainage device which comprises a base, a vertical plate is fixedly connected to the topof the base, a pair of sliding rails is fixedly connected to the vertical plate, and sliding grooves are formed in the adjacent sides of the sliding rails; a sliding block is slidably connected into the sliding groove, and a lead screw penetrates through the sliding block. A drainage bottle is fixedly connected to the sliding block, the bottom of the drainage bottle communicates with a hose, and the other end of the hose communicates with the ventricle to-be-drained part; a pressure chamber is arranged in the middle of the hose, a cylinder is fixedly connected to the inner wall of the pressurechamber, an elastic film is hermetically connected to one end, away from the inner wall of the pressure chamber, of the cylinder, and a conductive coating is coated on one side, in the cylinder, of the elastic film and connected with the controller through a wire; according to the ventricular pressure balance adjusting device, after the elastic film is deformed, the conductive coating is electrically connected with the contact column, then the controller controls the drainage bottle to stop lifting the height, and then ventricular pressure balance is quickly adjusted.

The embodiment of the invention discloses a method, device and equipment for segmenting a ventricular region in a brain CT image, and the method comprises the steps: recognizing a brain tissue regionin the brain CT image, carrying out the two-group clustering of the brain tissue region, and obtaining a background region and a non-background region of the brain tissue region; identifying connecteddomain areas in the non-background are, and sorting all the connected domain areas according to the number of included pixel points; determining the number of reserved connected domains, and selecting the first N connected domain regions including a large number of pixel points as candidate ventricular regions; judging whether the current candidate ventricular region can be determined as the ventricular region or not by utilizing the first target ratio and the first threshold value; and if not, adjusting the candidate ventricle. Therefore, the ventricular region obtained by segmentation is more complete and accurate. The ventricular region in the brain CT image can be automatically divided, so that the efficiency of dividing the ventricular region in the brain CT image is improved.

The invention provides a method, a device and equipment for determining a bleeding area based on a brain image, and a medium. The method comprises the following steps: determining a brain tissue area of each image in a brain CT image sequence; according to each brain tissue area, determining a ventricular edge corresponding to each brain tissue area; performing Hough transform straight line detection on each ventricular edge to obtain a target line segment of each ventricular edge; and determining a target area according to the target line segment of each ventricle edge, performing parabola fitting on pixel points of the target area to obtain a fitting result, and determining whether a bleeding area exists in the target area or not according to the fitting result. According to the method, the bleeding area is automatically determined based on the brain CT image, manual participation is not needed, the recognition speed is high, and the accuracy rate is high.

A device, system, and method for delivering energy to tissue. In particular, the present invention relates to a system and method for enhancing lesion formation without arrhythmogenic effects within relatively thick target tissues, such as the ventricles of the heart. In one embodiment, charge-neutral pulses and non-charge-neutral pulses may be delivered to induce the formation of electrolytic compounds that enhance cell death at the treatment site. Additionally or alternatively, tissue at the treatment site may be heated to sub-lethal temperature before ablating the tissue.

The invention discloses a Y-type dual-purpose drainage instrument with two chambers and two capsules, which consists of a child and mother capsule structure and a Y type double-lumen tubes structure. The child and mother capsule structure includes a common external wall of the child and mother capsule, and an ascus inner wall and a mother cyst inner wall which are not communicated with each other, wherein the ascus inner wall and the mother cyst inner wall respectively form a ascus cyst cavity and a mother cyst cavity. The Y-type double-lumen tubes structure is provided with two branched ducts, which are respectively a first branched duct and a second branched duct respectively. One end of the first branched duct is provided with a plurality of side poles and the other end is communicated with the ascus cyst cavity through an intracavity pipeline and an ascus channel, while one end of the second branched duct is provided with an arc capsule structure with an opening on a medial cystic wall and the other end is communicated with the mother cyst cavity through an external cavity pipeline. By adopting the Y-type dual-purpose drainage instrument with two chambers and two capsules, anti-spasm medicine is regularly and sustainably applied in local vessels in a brain, thereby improving the intracranial drug concentration and effectively preventing and controlling the spasm of brain vessels. In addition, the lumbar cistern operation is replaced to avoid puncturing ventricle again in the hydrocephalus shunt operation, thereby reducing incidence of hydrocephalus.

The invention provides an infarction region segmentation method and device based on a brain image, equipment and a medium. The method comprises the steps of determining a seed point region for infarction region segmentation based on a candidate ventricle region and a cerebral cortex region extracted from a brain image; determining an infarction segmentation point in the candidate ventricle region by using an optimal path from each pixel point in the seed point region to a central point in the brain image; and segmenting a corresponding infarction region from the candidate ventricle region by using the infarction segmentation point. According to the method, the ant colony algorithm is adopted to analyze the infarction segmentation points in the candidate ventricle region, so that the corresponding infarction region is segmented from the candidate ventricle region by using the infarction segmentation points, the infarction region adhered to cerebrospinal fluid in the candidate ventricle region is automatically and effectively segmented, and the universality and efficiency of infarction region segmentation are enhanced.

The invention relates to the technical field of medical apparatus and instruments, and provides a ventricular connecting assembly and a ventricular assist system. The ventricular connecting assembly comprises a clamping assembly and a locking assembly; the clamping assembly comprises a split ring, a first connecting arm and a second connecting arm, the split ring is provided with a first end and a second end, the inner diameter of the split ring is adjustable, and the split ring has a clamping state and a non-clamping state; the first connecting arm and the second connecting arm are respectively connected with the first end and the second end; the locking assembly comprises a connecting piece and a locking piece, the connecting piece is connected with the second connecting arm, the locking piece is rotationally connected with the connecting piece, the locking piece can rotationally abut against the first connecting arm, the inner diameter of the split ring can be adjusted when the locking piece rotates, and the locking piece is clamped with the second connecting arm so that the split ring can be kept in the clamping state. The ventricular connecting assembly can facilitate installation of a blood pump.

The invention discloses an intracranial diversion and intracranial pressure measurement integrated system, belongs to the technical field of medical instruments, and can solve the problems that in the prior art, intracranial diversion and intracranial pressure monitoring are carried out separately, the operation wastes time and labor, and infection is easily caused. The system comprises a drainage tube, a drainage device and a monitoring device. One end of the drainage tube is inserted into the ventricle of a patient while the other end is connected with the drainage device. A film pressure sensor is arranged on the inner wall of the end, inserted into the ventricle of the patient, of the drainage tube and connected with a wire, and the other end of the wire is connected with the monitoring device. The film pressure sensor is used for collecting a cerebrospinal fluid pressure signal in the ventricle of the patient. The wire is used for transmitting the cerebrospinal fluid pressure signal to the monitoring device. The system is used for intracranial diversion and intracranial pressure monitoring.

A control system and method for automatically adjusting the height of an external ventricular drain from a patient. The height of a pole supporting the bag into which the fluid is drained can be varied, increased or decreased, as driven by a motor. A drip chamber and collection bag that receive the fluid from the patient are attached to the height variable pole. An external fluid pressure tube is coupled to the patient at one end and to a pressure sensor at the other. The pressure sensor is coupled to the height variable pole. The system includes a feedback loop that adjusts the height of the external ventricular drain (EVD) to match the height of the patient's head. As the patient's head moves up or down, the variable height pole moves up and down a corresponding distance to maintain the patient's intracranial or intraspinal pressure, and therefore the cerebrospinal fluid (CSF) drainage rate, at a preset value.

The invention provides a heart nuclear magnetic resonance image central ventricle myocardial segmentation model training method, segmentation method and device, preprocessing of a heart nuclear magnetic resonance image is carried out through employing contrast-limited adaptive histogram equalization and Gaussian blur, and the image contrast of a training sample is effectively improved, therefore, the recognition and segmentation effects are improved. Meanwhile, in the segmentation model training process, the dependency on training data can be effectively reduced through a transfer learning mode, and the recognition accuracy is improved under the condition of lacking the training data. Furthermore, a mixed loss function combining cross entropy loss, Dice loss and edge loss is adopted in training, the influence of unrelated backgrounds can be reduced, boundary contour features are concerned, the problem of data category imbalance is solved and the training result is more accurate under the condition of ensuring the stability of the model training process, and the demand on the number of training data is reduced to a certain extent.

Brain drainage device having a rod-shaped hollow body (10) with an inner drainage channel (11) for insertion through the cranium into the brain, a first sensor arrangement (20) with at least one sensor (21, 22, 23, 24) for measuring a physical parameter, and a signal interface; wherein the rod-shaped hollow body has a first region A which, in the applied state, is designed to protrude into the ventricle situated in the brain; wherein the rod-shaped hollow body has a second region B, which is arranged proximally from the first region, wherein the second region is designed to lie in the region of the brain mass in the applied state; wherein the first sensor arrangement is arranged in the second region in order to measure a physical parameter of the brain mass; wherein the first sensor arrangement is connected to the signal interface such that measurement data determined by the first sensor arrangement are transmitted to a measuring system that is to be connected.

The invention belongs to the technical field of medical instruments, and particularly relates to a pump body and a ventricular assistance system. The pump body comprises a pump shell and an impeller,wherein the pump shell forms a cavity and is provided with a liquid inlet, and hydraulic bearings are formed in the two cavity walls of the cavity and provided with a plurality of first dynamic pressure grooves and second dynamic pressure grooves; the first dynamic pressure grooves and the second dynamic pressure grooves are alternately distributed around the central axis of the liquid inlet, thefirst dynamic pressure grooves are longer than the second dynamic pressure grooves, the ends, close to the central axis of the liquid inlet, of the first dynamic pressure grooves are located on a first circle; and the ends, far from the central axis of the liquid inlet, of the first dynamic pressure grooves are located on a second circle; the ends, close to the central axis of the liquid inlet, ofthe second dynamic pressure grooves are located on a third circle; the circle centers of the first circle, the second circle and the third circle are located on the central axis of the liquid inlet;and the radius of the third circle is more than that of the first circle and less than that of the second circle. The impeller of the pump body is low in abrasion rate and high in use reliability.

The invention discloses a CTP image-based infarction false positive filtering method. The infarct false positive filtering method comprises the following steps: S1, segmenting a complete ventricle area in a brain tissue CTP image; S2, obtaining a brain sulcus area threshold according to the complete ventricle area threshold, and screening out a complete brain sulcus area; and S3, filtering the ventricle area and the cerebral sulcus area as false positive filtering areas. The complete ventricular region in the CTP image is firstly segmented, then the threshold value of the cerebral sulcus area is obtained according to the threshold value of the ventricle area, then the complete cerebral sulcus area is screened out, and the ventricular region and the cerebral sulcus area are used as false positive filtering regions for filtering, so that false positive probability is reduced, and diagnosis accuracy is improved.

The invention belongs to the technical field of biological medicines, and particularly relates to application of dental pulp stem cells in preparation of a medicine for treating multiple sclerosis. The embodiment of the invention provides application of dental pulp stem cells in preparation of a medicine for treating multiple sclerosis. The dental pulp stem cells are simple and convenient to obtain, easy to amplify in vitro and high in multiplication capacity, and have clinical application advantages compared with other human body mesenchymal stem cells. Research shows that the dental pulp stem cells can obviously reduce EAE mouse spinal cord demyelination focus, reduce the injury area around the ventricle and reduce demyelination injury; in addition, immune cell infiltration in the brain can be obviously reduced, T cell infiltration is reduced, and central inflammation is inhibited.

The invention discloses a bypass system for a ventricular bypass surgery. The bypass system comprises an auxiliary intubation assembly, a first communicating pipe and a second communicating pipe, the first communicating pipe and the second communicating pipe communicate under the scalp through a communicating connector, the end, away from the communicating connector, of the first communicating pipe communicates with the forehead position of the ventricular of the human body, and one end, far away from the communicating connector, of the second communicating pipe communicates with the temporal angle area of the human ventricle. The auxiliary intubation assembly comprises a supporting rod, a first sliding rod and a second sliding rod are arranged on the supporting rod in a sliding mode, and a first sighting device and a second sighting device which are kept in an aligned state are arranged on the first sliding rod and the second sliding rod respectively. The arranged auxiliary intubation assembly can assist medical staff to accurately grasp that the second communicating pipe penetrates into the temporal angle area, the correct direction and depth of puncture are guaranteed, the arranged first communicating pipe and the second communicating pipe can successfully establish an effective bypass from the temporal angle to the frontal angle, and cerebrospinal fluid circulation is rebuilt.

An intra-aortic dual balloon driving pump catheter device having a catheter; a first balloon and a second balloon respectively surrounding the catheter, being arranged successively along the longitudinal direction of the catheter, wherein the position of the first balloon is placed at the distal end of the catheter, and the second balloon is placed immediately adjacent to the proximal end of the first balloon; the first balloon and the second balloon are periodically expanded to a dimension that nearly blocks the aortic blood flow and contracted to a dimension that does not prevent the blood flow from passing through; wherein the first balloon periodically inflates in diastole and deflates in systole working as a pump, while the second balloon conversely deflates in systole and inflates in diastole functioning as a valve, altogether leading to blood pumping from contracting ventricle and keeping driving forward ahead in the aorta.

The invention discloses a quantitative cerebrospinal fluid diversion system and method. The quantitative cerebrospinal fluid diversion system comprises a cerebrospinal fluid diversion valve, a fluid inlet pipe from ventricle or lumbar cistern to the cerebrospinal fluid diversion valve, a fluid outlet pipe from the cerebrospinal fluid diversion valve to an abdominal cavity and a body surface control device. The cerebrospinal fluid diversion valve comprises a cavity and a magnetic induction valve, wherein the cavity is divided into two side cavities by a piston, and the two sides of the cavity are connected with the fluid inlet pipe and the fluid outlet pipe through the magnetic induction valve. A piston horizontally moves in the cavity under the hydraulic pressure difference; an electromagnetic field controls the rotation angle of the magnetic induction valve in different time phases, and then the fluid inlet pipe and the fluid outlet pipe are switched and connected. A body surface external induction control card obtains the time from the opening time point to the filling time point of the cavity connected with one side of the fluid inlet pipe, calculates the time needed by one-timequantitative diversion, obtains the diversion speed and accordingly calibrates the upstream and downstream hydraulic pressure difference of the cavity. The ventricular system pressure value of a patient is calculated to judge whether the ventricular system pressure is in a normal range or not, so that siphon, excessive shunt and cerebrospinal fluid reflux are avoided.

The invention discloses a medical left ventricular drainage tube. The medical left ventricular drainage tube comprises a drainage tube body; a main drainage hole is formed in one end part of the drainage tube body; side drainage holes are formed in the side wall at one end of the drainage tube body; a balloon is arranged on each of the sides walls of the drainage tube body on the two sides of the side drainage holes; the two balloons are connected with an infusion connector through an infusion tube; the infusion tube is embedded into the side wall of the drainage tube body; one end of the infusion tube is communicated with the two balloons; the other end of the infusion tube extends out of the side wall of the drainage tube body and is connected with the infusion connector; the infusion connector is also matched with a tapered sealing plug. According to the medical left ventricular drainage tube, the drainage tube body is separated from the left atrium (ventricle) and is not easily adhered to the wall by utilizing the expansion of the balloons; moreover, the drainage tube floats on blood because of density difference, so that the drainage effect is good, the operation is easy to perform, and the medical left ventricular drainage tube is easy to operate.