30 results about "Aneurysm embolization" patented technology

The present invention relates to a medical device for placement at a predetermined location within a vessel of the human body, and more particularly, relates to a collapsible aneurysm embolization device that is delivered through the lumen of a catheter and exits the catheter at a predetermined position within the vessel to thereby embolize a blood vessel defect, such as an aneurysm.

An aneurysm embolic device is disclosed for use in occluding the flow of blood within an aneurysm. The aneurysm embolic device includes an expandable sealing member having a circular joining member and reinforcing spokes which give the sealing member a slightly cupped configuration. The embolic device also includes an occlusive member carried by the expandable sealing member. When the aneurysm embolic device is deployed within the aneurysm, the sealing member expands and the occlusive member fills the aneurysm preventing the flow of blood within the aneurysm.

An aneurysm embolization device can include a body having a single, continuous piece of material that is shape set into a plurality of distinct structural components. For example, the device can have an expandable component and an atraumatic tip portion extending therefrom. Further, the tip portion can be configured to enable the device to be implanted within the aneurysm while tending to mitigate risk of puncturing the aneurysm dome or otherwise assist in framing the aneurysm in advance of placement of additional embolic material.

A method and device used for treating an aneurysm of a patient. A framework for supporting one or more embolization elements is introduced into the patient's aneurysm. A stent, connected to the framework is introduced into a vessel leading into and communicating with the aneurysm, with the stent being compressed against the inner wall of the vessel for anchoring the framework. One or more embolization elements are introduced through the framework into the aneurysm, and in this manner the framework maintains the one or more embolization elements within the aneurysm. In the illustrative embodiment, the embolization element comprises an embolic coil, the stent comprises a helical coil, and the framework and helical coil are connected so as to be introduced into the patient simultaneously.

The present invention includes a method for treating an aneurysm. The method includes providing a biocompatible polymeric string or hollow tube and transporting the string or hollow tube to the aneurysm. The aneurysm is filled with the string. The string is cut when the aneurysm is substantially filled.

The invention discloses a novel braided part system for embolizing aneurysm and belongs to the field of medical instruments. The braided part system comprises a mesh braided part and a delivery system connected with the braided part. During an operation, a doctor can send the braided part to an aneurysm portion by a microcatheter and a sheath, the braided part which is compressed originally is pushed gradually and released into the aneurysm portion, and then is separated from the delivery system by an electric detaching manner or other detaching manners, the delivery system and the sheath are removed to the outside of the body of a patient, and the braided part is remained in the aneurysm portion as an embolism. The braided part system can embolize the aneurysm portion effectively, requirements to personal embolizing skills of the doctor in operation are lowered, operation time is shortened, impact to the top of the aneurysm is lowered, interference to blood flow in tumor-carried blood vessels is decreased, and clinical effects of aneurysm embolism is improved further.

The invention discloses a mesh tubular spring for embolism, which aims at solving the technical problem of enabling an aneurysm to quickly form an embolism so as to prevent rupture of the aneurysm and angiogenesis embolization. The mesh tubular spring for embolism disclosed by the invention is a mesh tubular helical spring ring or a mesh tubular spatial mesh spring woven through nickel-titanium alloy wires and platinum wires. The preparation method of the mesh tubular spring disclosed by the invention comprises the steps of: weaving the nickel-titanium alloy wires and the platinum wires into a straight cylindrical mesh tube; helically winding; performing heat treatment; welding a sleeve; and welding a guide wire head and a guide wire pole. Compared with the prior art, the mesh tubular helical spring ring is woven into mesh tubular shape through the nickel-titanium alloy wires and the platinum wires, the nickel-titanium alloy wires have good shape memory function, and the spring is more stable after the mesh tubular spring for embolism made of the nickel-titanium alloy wires is put into the aneurysm so as to fill up the space inside the aneurysm more easily; the mesh tubular spring for embolism adopts a multi-mesh structure, dense meshes can cause embolism more easily so as to reduce the aneurysm embolization time, prevent the aneurysm from rupture and effectively prevent angiogenesis embolization.

The invention relates to a microcatheter moulding stent used for the intracranial aneurysm embolization and a preparation method of the microcatheter moulding stent. The microcatheter moulding stent comprises a first bending part and a second bending part, wherein the first bending part is connected with the second bending part, the length of the first bending part is 3-5 mm, the length of the second bending part is 5-15 mm, the diameter of the stent is 1-1.5 mm, the length of the stent is 30-50 mm, and the first bending part and the second bending part are used for closely fitting the intracranial vascular bending and arterial aneurysm positions. According to the microcatheter moulding stent and the preparation method, the bending degree of the stent closely fits the intracranial vascular bending and arterial aneurysm shapes, so that the accurate moulding of the microcatheter is guided, therefore, the accurate placement of the microcatheter in the surgery is facilitated, and further, the operative problems including the difficulty in placement of the microcatheter, the separation of the microcatheter, the floating of a spring ring, and the like caused by poor moulding of the microcatheter in the embolism process are avoided.

An aneurysm embolization device includes at least: a sac-shaped balloon dome part which is inserted into the aneurysm, then expanded and left therein; and a balloon plane part which is provided at an opening of the balloon dome part and covers a mouth part of the aneurysm. The balloon plane part has a hole communicating with the inside of the balloon dome part. The aneurysm embolization device thus constituted is housed into a lumen of a protective outer sheath member formed of a flexible elongated-body having the lumen therein. A tip part of the protective outer sheath member is placed at a desired position, and the aneurysm embolization device is ejected from the tip part of the protective outer sheath member. The aneurysm embolization device thus ejected includes the balloon dome part placed at a desired position and the balloon plane part deploying to cover the desired position.

The invention provides a coil for embolizing an intracranial aneurysm and a manufacturing method thereof. The spring coil includes a network tube braided by polymer filaments and a metal core wire passing through the network tube. The method includes the following steps: weaving the mesh pipe; winding the metal core wire; heat-treating the metal core wire at high temperature to shape; assembling the metal core wire through the mesh pipe to form a coil; Smooth spherical surface, the proximal end of the spring coil is fixedly connected with the metal core wire, the mesh tube and the connector. It can be seen from the above scheme that the network tube made of high molecular polymer can effectively induce the formation of thrombus in the aneurysm, accelerate the embolization of the coil, shorten the embolization time of the aneurysm, and reduce the recurrence rate of the aneurysm; the metal core wire has good Elasticity and shape memory function, strong anti-untwisting, can maintain the original shape after being sent into the aneurysm, the coil will be more stable in the aneurysm, it is easier to fill the aneurysm space, and further accelerate aneurysm embolization.

The invention discloses a method and a system for predicting a recurrent risk after intracranial aneurysm embolization. The method comprises the following steps of analyzing relations between haemodynamics parameter values and clinical features after the intracranial aneurysm embolization of the existing clinical case and a prognosis direction after the intracranial aneurysm embolization respectively; determining haemodynamics parameter values and clinical features corresponding to the prognosis direction after the intracranial aneurysm embolization and establishing a prognosis direction evaluation model after the intracranial aneurysm embolization; accurately and uniformly predicting the subsequent prognosis direction after the intracranial aneurysm embolization of the clinical case according to the established evaluation model, so that the prognosis direction after the intracranial aneurysm embolization is quantitatively predicted.

Aneurysm embolization devices made from laser cut NITINOL types of metals are highly differentiated by their form, which governs function, in addressing acute states of aneurysm to achieve improved clinical outcomes, namely better results with fewer devices needed, alone or in complement with conventional coils and devices.

The invention discloses an aneurism embolization device and an aneurism embolization system. The aneurism embolization device comprises a braided part arranged in the neck of an aneurism and fitting the same, and a support arranged in a parent artery at the neck of the aneurism; one end of the support is connected with the braided part; the other end of the support is connected with a push guide wire during interventional operation; the braided part and the support are delivered to the vascular lesion part through a micro catheter during interventional operation. Compared with the prior art, the aneurism embolization device has the advantages of lowered occupation effect, lower cost, adaptability to aneurisms different in shape at different parts, and lower risk of blocking of other branches and delayed cracking of the arteries.

The invention provides an aneurysm embolization catheter and an aneurysm operation auxiliary device, which relate to the technical field of medical devices. The aneurysm embolization catheter comprises a connector and a catheter body, wherein the connector is connected with one end of the catheter body. The catheter body includes a multi-lumen structure and an inflatable balloon disposed on the external surface of the catheter body. The multi-cavity structure comprises a guide wire guide cavity, a spring coil guide cavity and an inflation cavity. The inflatable cavity is communicated with theinflatable balloon. The connector is provided with a guide wire inlet, a spring coil inlet and an inflation interface, which are one-to-one correspondingly communicated with the guide wire guide cavity, the spring coil guide cavity and the inflation cavity. The other end face of the catheter body is provided with a guide wire outlet communicating with the guide wire guide cavity. A spring coil outlet communicating with the spring coil guide cavity is arranged on the outer surface of the catheter body corresponding to the position of the inflatable balloon. The catheter and the device solve thetechnical problems of complicated operation and easy winding of the spring coil and the protective balloon catheter in the prior art.

Provided in the invention is a cerebral aneurysm embolization therapeutic device and a using method thereof. The invention discloses a suture-contained cerebral aneurysm embolization therapeutic device and a using method thereof. The device comprises a conveying guide wire, a sheath pipe, a skeleton suture, and a PU nanometer electrospining net. The skeleton suture is in a rhombus shape; a nickel-titanium memory alloy wire is connected in a head-to-end mode to form an annular shape and then is drawn to prefabricate and form the rhombus-shaped skeleton suture. A PU nanometer electrospining wire is attached to the surface of the rhombus-shaped skeleton suture; the PU nanometer electrospining wire is interlaced in the rhombus-shaped skeleton suture to form the PU nanometer electrospining net. The skeleton suture is arranged in a shape like a string of beads based on connecting points of the rhombuses; the connecting points of the rhombus-shaped skeleton suture are flexible bonding ones; and the rhombus-shaped skeleton suture in a shape like a string of beads circles into a spiral shape to fill the cerebral aneurysm automatically according to the cerebral aneurysm space structure. According to the invention, the effective embolization area and embolization effect are increased; and the operation difficulty, the treatment cost, and the cerebral aneurysm recurrent risk are reduced. The device is sent into the cerebral aneurysm cavity by a micro pipe, thereby achieving a cerebral aneurysm enclosing objective.

The invention relates to a visceral aneurysm interventional operation model based on 3D printing and a manufacturing method, and belongs to the technical field of medical teaching aids. The operation model is made of a transparent material through 3D printing; the operation model comprises a continuously communicated channel for simulating a cardiovascular system lumen in human viscera; the channel is a closed channel with two openings, and a protrusion which is used for simulating the position and the shape of human hemangioma and protrudes out of the outer side of the channel is arranged in the channel. According to the invention, the state of the aneurysm in a circulating state can be simulated in vitro; the catheter is used for performing in-vitro simulated embolism operation on the aneurysm; the model is made of a full-transparent material, so that observation is facilitated, the relationship between the manipulation of a doctor and the catheter state can be understood favorably, and the doctor is helped to improve the operation skill of the aneurysm embolism; the device can be used as a teaching aid for propaganda and education of patients and medical teaching. The lumen simulating the human visceral cardiovascular system is manufactured through the 3D printing technology, and the water tightness and the reality sense of the model are fully guaranteed.

The invention discloses an electrocoagulation guide wire system used for arterial aneurysm embolism. The electrocoagulation guide wire system comprises a power supply, a positive electrode hypotube and a positive electrode platinum-iridium ring, wherein a PTFE inner insulating layer is arranged between the positive electrode hypotube and the positive electrode platinum-iridium ring, a positive electrode conductive wire is arranged in the PTFE inner insulating layer, two ends of positive electrode conductive wire are electrically connected with the positive electrode hypotube and the positive electrode platinum-iridium ring, a negative electrode hypotube and a negative electrode HHS tube are fixedly connected to the outer side of the PTFE inner insulating layer, the positive electrode conductive wire is connected with the positive electrode of the power supply, both the negative electrode hypotube and the negative electrode HHS tube are connected with the negative electrode of the powersupply, the negative electrode HHS tube and the negative electrode hypotube are fixedly connected through welding, same first epoxy glue is arranged between the positive electrode hypotube and the negative electrode hypotube, the outer sides of the positive electrode hypotube and the negative electrode hypotube are fixedly connected with one same first PET heat shrinkable tube, and the outer sideof the first PET heat shrinkable tube is fixedly connected with a PTFE heat shrinkable tube. The electrocoagulation guide wire system is easy to operate, and convenient in use and treatment, and theuse requirements can be satisfied.

Embolic implants, delivery systems and methods of manufacture and delivery are disclosed. The subject implants are deployed in two stages. If sized properly as observed in the first stage, they are deployed to the second stage and detached. If not sized properly in/at the first stage, the implants are designed to be withdrawn and replaced with a more appropriately sized implant or another treatment option selected. Some of the implant configurations may be withdrawn even after the second stage deployment as well.

The invention provides an aneurysm embolization micro-catheter. The micro-catheter is provided with a catheter body, a head end I and a head end II, wherein one side of the head end I is connected with a handle; the head end II is provided with an end hole; the bending degree of the catheter body close to one side of the head end II is adjustable, and a side hole is formed in the upper surface of the catheter body; a check valve is arranged between the side hole and the head end II; the check valve allows a guide wire to be inserted into the micro-catheter from the end hole of the head end I, and a spring ring is put in from the handle and only can be taken out from the side hole. The aneurysm embolization micro-catheter has the following advantages that the spring ring is taken out from the side hole, so that a risk that the spring ring pierces an aneurysm can be reduced, counterforce of the catheter is reduced, and the stability of the catheter is increased; the head end II has a section of length with adjustable bending degree, and the direction of the side hole can be controlled through various shapes of the head end II, so that the filling uniformity and density of the aneurysm are increased; with regard to the aneurysm with a tumor cavity having no depth, the shapes of the head ends of the micro-catheter can be adjusted, so that an opening of the side hole is aligned to an aneurysm neck, and the aim of safely filling the aneurysm is achieved.

The invention relates to an aneurysm embolism device. The aneurysm embolism device comprises an embolism device, a pushing wire and a leading-in sheath, wherein the embolism device and the pushing wire are pre-installed in the leading-in sheath, the embolism device is connected with the pushing wire, and one end of the pushing wire extends to the outside of the leading-in sheath. The aneurysm embolism device can be released and recycled for multiple times, the operation difficulty is reduced, and while an aneurysm is effectively embolized, the aneurysm-carrying aneurysm and branch occlusion are avoided; instrument displacement can be effectively avoided, and the displacement risk after the aneurysm is filled is reduced; and the aneurysm embolism device can be used for treating aneurysms atdifferent positions and in different forms. The aneurysm embolism device is applied to the technical field of medical instruments.