34 results about "Internal carotid artery" patented technology

The invention provides a medical device having a catheter and one or more expandable constricting / occluding members. The catheter is adapted for use with therapeutic or diagnostic devices, including an angioplasty / stent catheter and an atherectomy catheter. The constrictor / occluder is mounted at the distal end of the catheter. Manometers may be mounted distal to one or more constrictors for measuring pressure distal to the constrictor(s). Methods of using the devices are disclosed for preventing distal embolization during extracranial or intracranial carotid artery, vertebral artery, or coronary artery procedures, or procedures involving any vessel having collateral flow by reversing flow in the diseased vessel.

The invention provides a medical device having a catheter and one or more expandable constricting / occluding members. The catheter is adapted for use with therapeutic or diagnostic devices, including an angioplasty / stent catheter and an atherectomy catheter. The constrictor / occluder is mounted at the distal end of the catheter. Manometers may be mounted distal to one or more constrictors for measuring pressure distal to the constrictor(s). Methods of using the devices are disclosed for preventing distal embolization during extracranial or intracranial carotid artery, vertebral artery, or coronary artery procedures, or procedures involving any vessel having collateral flow by reversing flow in the diseased vessel.

Interventional procedures on the carotid arteries are performed through a transcervical access while retrograde blood flow is established from the internal carotid artery to a venous or external location. A system for use in accessing and treating a carotid artery includes an arterial access device, a shunt fluidly connected to the arterial access device, and a flow control assembly coupled to the shunt and adapted to regulate blood flow through the shunt between at least a first blood flow state and at least a second blood flow state. The flow control assembly includes one or more components that interact with the blood flow through the shunt.

A liner is advanced through a narrowed region in a vessel such as the internal carotid artery. The liner is advanced through the narrowed region in a collapsed position. A stent is then advanced through the liner and expanded to open the narrowed region. The liner may also have an anchor which expands an end of the liner before the stent is introduced.

A liner is advanced through a narrowed region in a vessel such as the internal carotid artery. The liner is advanced through the narrowed region in a collapsed position. A stent is then advanced through the liner and expanded to open the narrowed region. The liner may also have an anchor which expands an end of the liner before the stent is introduced.

A liner is advanced through a narrowed region in a vessel such as the internal carotid artery. The liner is advanced through the narrowed region in a collapsed position. A stent is then advanced through the liner and expanded to open the narrowed region. The liner may also have an anchor which expands an end of the liner before the stent is introduced.

The invention provides a blood vessel extracting method comprising the steps of determining the starting point of a blood vessel, determining a plurality of blood vessel sections of the blood vessel along the direction of the blood vessel by starting from the starting point of the blood vessel, and connecting the blood vessel sections to extract the blood vessel. The tubular structure adaptive tracking method based on a level set has higher adaptability. The resolution of the blood vessel sections is automatically adjusted according to the scale of the blood vessel. The method is applicable to extraction of blood vessels of different scales, and enables rapid and accurate extraction of complex blood vessels of the head and neck region, such as internal carotid artery and vertebral artery, to be realized.

A liner is advanced through a narrowed region in a vessel such as the internal carotid artery. The liner is advanced through the narrowed region in a collapsed position. A stent is then advanced through the liner and expanded to open the narrowed region. The liner may also have an anchor which expands an end of the liner before the stent is introduced.

The invention provides a carotid artery ultrasonic scanning three-dimensional reconstruction method and system. The carotid artery ultrasonic scanning three-dimensional reconstruction method comprisesthe steps of S1, obtaining model data; S2, resampling the model data to obtain a carotid artery model data source; S3, according to the carotid artery model data source, obtaining surface image images corresponding to the six surfaces forming a model of the carotid artery model data source; S4, splicing the six surface image images to form a carotid artery 3D model framework for display and output; S5, on the basis of the 3D model frame, according to a carotid artery model data source, obtaining a section image of a section, passing through two pixel points x1 and x2 on any surface, on the 3Dmodel frame; and S6, splicing the obtained section image and each surface image in the original carotid artery 3D model framework into a new 3D model. Compared with the traditional carotid artery two-dimensional longitudinal section diagram observation, the carotid artery two-dimensional longitudinal section diagram observation method has the advantage that the diagnosis accuracy is improved.

The invention provides a construction method of a mouse ischemic stroke model. According to the construction method, current stimulation is given to a Common carotid artery (CCA) of a mouse to form a thrombus embolus, the thrombus embolus is activated, the thrombus embolus is made to spontaneously enter the cranium through an Internal carotid artery (ICA), the intracranial Middle artery (MCA) is blocked, and then acute brain blood supply blocking and brain dysfunction are caused. The invention also provides an evaluation method of the mouse ischemic stroke model. The evaluation method comprises the following steps: marking the thrombus embolus formed on the CCA by using a near-infrared fluorescent molecular probe, tracking the position of the thrombus embolus in the mouse cranium by using a small animal living imaging instrument, and evaluating the ICA clogging degree by using fluorescence intensity.

Methods and systems are provided for a nasal pulse oximetry probe configured to measure blood originating from the internal carotid artery. One example system includes a light emitter and a light detector coupled to a substrate and an attachment mechanism configured to couple the nasal pulse oximetry probe to a nose of a patient, the light emitter and light detector positioned on opposite sides of the nose at the root of the nasal bridge.

An apparatus for conducting a training in endoscopic endonasal skull base surgery is provided.A training apparatus 2 for endoscopic endonasal skull base surgery is composed of a human head model 4 and a liquid circulation means 6. The human head model 4 comprises an anterior portion 8 including a nose part 16 in which nostrils 16a are formed, and a main portion 40 including at least part of a nasal septum 44, at least part of a nasal cavity lateral wall 42, at least part of a sphenoidal sinus posterior wall 66, and at least part of an internal carotid artery 72. The liquid circulation means 6 comprises a storage tank 102 for storing a nontransparent colored liquid, a supply flow path 104 disposed between the storage tank 102 and the at least part of the internal carotid artery 72, a return flow path 106 disposed between the at least part of the internal carotid artery 72 and the storage tank 102, and a circulation pump 108 for circulating the liquid within the storage tank 102 through the supply flow path 104, the at least part of the internal carotid artery 72, and the return flow path 106.

The invention relates to a neck and brain arterial pulse wave speed measurement system, which is characterized by comprising a signal collection device, a signal processing device, a display device and a communication interface module, wherein the signal collection device is connected with the signal processing device through the communication interface module, the output end of the signal processing device is connected with the display device, the signal collection device is used for synchronously sampling blood flow signals at the tail sections of a common carotid artery and an internal carotid artery and converting the blood flow signals to corresponding digital signals, the signal processing device is used for processing synchronously obtained brain blood flow signals to obtain time difference among the signals, and the display device is used for displaying parameters of the blood flow signals and parameters of the time difference among the signals. The neck and brain arterial pulse wave speed measurement system achieves noninvasive detection on neck-brain arterial pulse wave speed, is accurate and reliable in results and strong in clinical practicality, reflects stiffness conditions of the cerebral artery more accurately and directly, estimates apoplexy risks, and is beneficial to early discovery and precaution of apoplexy.

The invention discloses a novel method for constructing a cerebral ischemia animal model with aggregation of magnetic beads. According to the method, a living animal is injected with buffer solutionsprepared from magnetic nanoparticles, soft filiform magnetic lines are wound around an internal carotid artery by surgical means, so that thrombus is formed in the position where the soft filiform magnetic lines are wound of the living animal for two hours, the constructed cerebral ischemia animal model is highly coincided with a symptom of cerebral ischemia, the damage to the animal model is smaller, and the mortality of the constructed animal model is lower.

The invention provides a carotid artery center line extraction method and device, a storage medium and electronic equipment. The method comprises the following steps: acquiring a three-dimensional neck blood vessel image; segmenting the three-dimensional neck blood vessel image to obtain a blood vessel mask image; extracting a blood vessel skeleton line from the blood vessel mask image to form a three-dimensional neck blood vessel skeleton line image; a carotid artery skeleton line is recognized from the three-dimensional neck blood vessel center line image, a carotid artery skeleton line image is obtained, and the carotid artery skeleton line comprises a left carotid artery skeleton line and a right carotid artery skeleton line; and extracting a common carotid artery-internal carotid artery center line from the carotid artery skeleton line image. The technical problem of automatically and accurately extracting the carotid artery center line from the three-dimensional image of the neck blood vessel is solved, the problems of complex network design, manual labeling and the like are avoided, the principle is simple, and the practicability is extremely high.

A method for preparing animal model of cerebral ischemia-reperfusion damage incldues deligating animal common carotid artery and injecting thrombus into internal carotid artery to cause cerebtal ischemic damage, then reopening common carotid artery to cause cerebral is chemia-reperfusion damage so as to cause animal ceral embolism. The method can be used for quantization analysis of curative result and safety for curing method of cerebral embolism, also for pathomorphological comparison and molecular biological study.

The invention relates to a specimen making method for a human cerebrovascular interventional operation, which comprises the following steps of selecting a human specimen and performing preservative treatment on the human specimen; selecting materials, wherein the head, the thorax and the abdomen are reserved, part of ribs and sternum are removed, upper limbs on the two sides are removed, and the middles of thighs are cut open; annularly sawing the top of the craniotomy, removing skin superficial fascia on the right side of the face, displaying parotid gland, removing skin superficial fascia onthe left side of the face, and exposing maxillary artery and branches; reserving partial skin and superficial fascia on the right side of the lower limb, removing the skin and superficial fascia on the left side, and displaying great saphenous veins, femoral arteries and branches; in the thoracic cavity: removing superficial fascia and deep fascia, and exposing heart appearance and head and arm stems; bleaching and washing the specimen; cleaning redundant tissues on the surface of the specimen; threading a guide wire, wherein in the right groin area, the guide wire is slowly inserted along the femoral artery till the common iliac artery, the internal carotid artery and the basilar artery are reached. And the prepared specimen has strong sense of reality, is beneficial to specimen observation, and is convenient for teaching and learning.

Provided is a device for carrying out training for endoscopic endonasal skull base surgery. A training device 2 for endoscopic endonasal skull base surgery is constituted of a human head model 4 and a liquid circulation means 6. The human head model 4 is provided with a front part 8 that includes a nose part 16 in which nostrils 16a are formed and a main part 40 that includes at least part of a nasal septum 44, at least part of a nasal cavity lateral wall 42, at least part of a sphenoidal sinus posterior wall 66, and at least part of an internal carotid artery 72. The liquid circulation means 6 is provided with: a retention tank 102 for retaining a nontransparent colored liquid; a supply flow path 104 disposed between the retention tank 102 and the at least part of an internal carotid artery 72; a return flow path 106 disposed between the at least part of an internal carotid artery 72 and the retention tank 102; and a circulating pump 108 for circulating the liquid in the retention tank 102 through the supply flow path 104, the at least part of an internal carotid artery 72, and the return flow path 106.

The invention discloses a construction method of a brain metastatic cancer animal model and a medical application of the brain metastatic cancer animal model, and the internal carotid artery injection brain metastasis cancer mouse model better conforming to the normal physiological characteristics of the human body is constructed for the first time, and compared with a brain metastasis cancer animal model reported in the field at present, the brain metastasis cancer animal model constructed by the method better conforms to the normal physiological characteristics of the human body; the invention provides a brand-new brain metastasis animal model of a non-human mammal for the field, and the model can be used for researching pathogenesis of brain metastasis and can be used for screening of new drugs and effectiveness testing.

The integrated thrombectomy stent comprises an integrally-formed stent body, the two ends of the stent body are the near end and the far end respectively, the diameter of the stent body is evenly and gradually reduced from the near end to the far end, and at least one far-end marker is arranged at the far end; the stent is respectively provided with a far-end part, a gradual change part and a near-end part which are connected from the far end to the near end, the diameter of the far-end part is 2-4mm, the diameter of the near-end part is 5-7mm, and the taper included angle of the gradual change part is 3-34 degrees; the pushing rod is connected with the near end of the support through the near-end marker, and the pushing rod is pushed to drive the support to move along the microcatheter. According to the thrombus extraction stent, thrombus can be rapidly extracted, the thrombus extraction stent completely conforms to an anatomy structure from the internal carotid artery to the middle cerebral artery M1 section of a Chinese person, when the thrombus extraction stent enters a target position, deformation of blood vessels is reduced, and operation safety is improved.

Medical procedures and devices suitable for reducing the risk of embolic cerebrovascular events, including but not limited to cardioembolic stroke, that result from emboli entering the right or left common carotid artery. The invention uses a combination of intracranial flow diverting stent technologies and carotid stent technologies to achieve clinical objectives of embolic stroke prevention without thromboembolic and / or vascular stenosis complication. Such a stent has struts that generate high radial forces for endothelial apposition, and a mesh with interstices sufficiently small to prevent clinically significant-sized embolic material from passing therethrough from the common carotid artery into the internal carotid artery, but sufficiently large to enable blood and small clinically insignificant-sized embolic material to pass therethrough from the common carotid artery into the internal carotid artery.

The invention belongs to the technical field of artery interventional medical instruments, and discloses an artery peripheral sucker stent and a mounting method thereof. A net pipe stent is provided with supporting rods, each supporting rod is formed by connecting a plurality of V-shaped rods end to end, and every two opposite V-shaped rods form a rhombic mesh; an opening is formed in one side ofthe net pipe stent; a sucker stent is arranged in the middle of the net pipe stent; and a plurality of micro suckers are arranged inside the sucker stent. According to artery peripheral sucker stent disclosed by the invention, an intravascular operation mode is changed into a mode of performing operations from the vascular outer membrane, and radial uniform adsorption along the periphery of the pipe wall is carried out on the vascular outer membrane at a narrow part by adopting a sucker type stent auxiliary device, so that the otorhinolaryngeal cavity is uniformly enlarged, the cerebral bloodflow is increased, the ischemia and hypoxia symptoms of the brain are improved, the situation that a patient having an internal carotid artery stent needs to take anticoagulant drugs orally for a longterm to cause more serious complications can be avoided, the pain of the patient is relieved, blood vessels do not need to be blocked, and the safety coefficient is high.

The invention relates to an intravascular stent applied to carotid artery. The intravascular stent comprises a tubular stent body formed by butt joint of a common carotid artery stent section and an internal carotid artery stent section. The intravascular stent is characterized in that the internal carotid artery stent section is arranged to be of a first conical structure which is matched with aninternal carotid artery blood vessel of a human body in shape and extends upwards in an axial conical mode, and the area of the upper-end cross section of the first conical structure is smaller thanthat of the lower-end cross section of the first conical structure; the common carotid artery stent section is arranged to be of a second conical structure or a straight-barrel-shaped structure whichis matched with the common carotid artery blood vessel of the human body in shape and extends upwards in an axial conical mode, the upper end of the second conical structure and the lower end of the first conical structure are consistent in size and inclination, and the upper end of the straight-barrel-shaped structure and the lower end of the first conical structure are consistent in size; the tubular stent body comprises an inner-layer stent and / or an outer-layer stent; and a first mesh structure and a second mesh structure are arranged on the surface of the inner-layer stent and the surfaceof the outer-layer stent respectively, and an overlapping area exists between the first mesh structure and the second mesh structure.

The invention discloses an endoscopic para-pharyngeal space tumor excision method. The method comprises the following steps of dividing a conical structure of a para-pharyngeal space into two parts, namely an upper para-pharyngeal space and a lower para-pharyngeal space by taking a hard palate level as a boundary, and dividing the upper para-pharyngeal space into a front inner sub-region, a frontouter sub-region, a rear inner sub-region and a rear outer sub-region along a sagittal plane and a coronal plane by an axis of the internal carotid artery, and before an operation, selecting a properoperation approach according to the sub-region where the tumor body is located. The method has the beneficial effects that different endoscopic surgery approaches are selected according to the sub-region where the tumor body is located before the operation, the endoscopic surgery mode is adopted, the surgery view is fully exposed, intraoperative bleeding and surgical injuries are reduced, the occurrence and recurrence rate of postoperative complications is reduced, and the prognosis of a patient is improved.

The disclosure includes a balloon guiding sheath including an elongated sheath having a proximal end, a distal end, an inner tube and an outer tube both extending between the proximal end and the distal end, an access port located adjacent the proximal end, a distal port located adjacent the distal end, and a working lumen extending through the elongated sheath between the access port and the distal port. The balloon guiding sheath may include an inflatable balloon located on an outer surface of the elongated sheath adjacent the distal end, and at least one vent hole located between an outer surface of the elongated sheath and an inner surface of the inflatable balloon. The at least one vent hole may be configured to allow media to flow from the inflatable balloon to an external portion outside the balloon guiding sheath.

The invention relates to a neck and brain arterial pulse wave speed measurement system, which is characterized by comprising a signal collection device, a signal processing device, a display device and a communication interface module, wherein the signal collection device is connected with the signal processing device through the communication interface module, the output end of the signal processing device is connected with the display device, the signal collection device is used for synchronously sampling blood flow signals at the tail sections of a common carotid artery and an internal carotid artery and converting the blood flow signals to corresponding digital signals, the signal processing device is used for processing synchronously obtained brain blood flow signals to obtain time difference among the signals, and the display device is used for displaying parameters of the blood flow signals and parameters of the time difference among the signals. The neck and brain arterial pulse wave speed measurement system achieves noninvasive detection on neck-brain arterial pulse wave speed, is accurate and reliable in results and strong in clinical practicality, reflects stiffness conditions of the cerebral artery more accurately and directly, estimates apoplexy risks, and is beneficial to early discovery and precaution of apoplexy.

The disclosure includes a balloon guiding sheath including an elongated sheath having a proximal end, a distal end, an inner tube and an outer tube both extending between the proximal end and the distal end, an access port located adjacent the proximal end, a distal port located adjacent the distal end, and a working lumen extending through the elongated sheath between the access port and the distal port. The balloon guiding sheath may include an inflatable balloon located on an outer surface of the elongated sheath adjacent the distal end, and at least one vent hole located between an outer surface of the elongated sheath and an inner surface of the inflatable balloon. The at least one vent hole may be configured to allow media to flow from the inflatable balloon to an external portion outside the balloon guiding sheath.

The utility model relates to a microsphere catheter wire plug device, which is composed of a support catheter, a microsphere catheter, a tail microsphere pre-loaded with an oil liquid, and a membrane-shaped front microsphere structure. The tail microspheres are connected with the front microspheres through a microsphere conduit. Squeeze the tail microspheres, squeeze a certain volume of oily liquid to the front microspheres through the microsphere catheter, and make it expand, which is used to embolize the middle cerebral artery. The inner diameter of the supporting catheter is larger than that of the microsphere catheter, which can be inserted into the initial segment of the internal carotid artery to serve as vascular support. The front end microsphere of the device of the invention canrealize more thorough and more reliable blocking, At the same time, the infusion of contrast-enhanced material can be delivered to the embolism area at the time of embolization, and the embolization effect can be checked. At the same time, the infusion of other drugs can be delivered to the middle cerebral artery or embolism area.