56 results about "Great vein" patented technology

A transvenous implantable medical device adapted for implantation in a body, and which is particularly adapted for use in a vessel such as the coronary sinus or cardiac great vein. The implantable medical device may take the form of a lead or catheter, and includes an extendable distal fixation member such as a helix. In one embodiment, the fixation member is a helix constructed of a shape memory metal or other super-elastic material. Upon deployment, the helix assumes a predetermined helix shape larger than the diameter of the lead body diameter. The helix functions to wedge or fix the lead within the vessel in a manner that does not impede the flow of blood through the vessel. The helix may be retracted for ease of repositioning and / or removal. In one embodiment of the invention, the fixation member may be advanced using a stiffening member such as a stylet. In another embodiment, the helix is coupled to a coiled conductor such that rotation of the conductor extends or retracts the helix. According to yet another aspect of the invention, a helix lumen including a flexible fluid-tight seal may be utilized to house the helix when it is in the retracted position.

This invention is an improved method and device for treating varicose veins 200 or the greater saphenous vein 202. The method comprises the use of infrared laser radiation in the region of 1.2 to 2.2 um in a manner from inside the vessel 200 or 202 such that the endothelial cells of the vessel wall 704 are damaged and collagen fibers in the vessel wall 704 are heated to the point where they permanently contract, the vessel 200 or 202 is occluded and ultimately resorbed. The device includes a laser 102 delivered via a fiber optic catheter 300 that may have frosted or diffusing fiber tips 308, or that may be provided with a protective spacer. A motorized pull back device 104 may be used, and a thermal sensor 600 may be used to help control the power required to maintain the proper treatment temperature.

Described are devices, methods and systems useful for achieving occlusion of vascular vessels. Percutaneous procedures can be used to occlude and obliterate the greater saphenous vein, for example in the treatment of varicose vein condition caused by venous reflux. Certain embodiments encompass the percutaneous delivery of an occlusion device inverted within a cannula, its deployment and filling, so as to occlude or obliterate a portion of a vascular vessel.

Described are devices, methods and systems useful for achieving occlusion of vascular vessels. Percutaneous procedures are used to occlude and obliterate the greater saphenous vein, for example in the treatment of varicose vein condition caused by venous reflux. Certain embodiments encompass the deployment of one or more vascular occlusion devices via a through-and-through percutaneous procedure that leaves the vascular occlusion device or devices in a through-and-through condition.

Method and apparatus for the extracorporeal treatment of blood by utilizing a peripherally inserted dual lumen catheter assembly for the continuous removal and return of blood for renal replacement treatment, in particularly, treatment of congestive heart failure and fluid overload by ultrafiltration. A catheter is inserted in a peripheral vein and maneuvered upward through the vascular system to access the reservoir of blood in the large or great veins for continuous blood withdrawal and treatment. Air-tight connectors are incorporated in the catheter assembly to overcome the untoward effects of negative pressure in blood withdrawal.

According to the present invention a sensing means is provided for chronically measuring and / or sensing contractions of a right ventricle (RV) and / or a left ventricle (LV). The sensing means can include a tensiometric sensor, a single or a multiple axis accelerometer to measure peak endocardial acceleration due to atrial and ventricular depolarizations. For example, a tensiometric stylet, disposed within a portion of the coronary sinus, great vein, or branches of the great vein, simultaneously senses atrial contractions, RV contractions and LV contractions and provides an output signal related thereto. When an atrial contraction occurs, pacing stimulation is delivered to the LV upon expiration of a predetermined A-LV delay interval. The A-LV delay interval for the pacing therapy is adjusted so as to avoid delay between the respective contractions of RV and LV, respectively, and thereby promote ventricular synchrony.

A method and apparatus for cardioverting the atrium of a human heart that includes insertion of first and second elongated electrodes tranvenously into the heart and associated vessels. One electrode is preferably located in the coronary sinus and great vein of the heart. The other electrode is preferably located in the vicinity of the right atrium of the heart, spaced from the electrode located in the coronary sinus. In response to detection of fibrillation or in response to manual triggering, a defibrillation pulse is applied between the first and second electrodes to effect atrial cardioversion. Further, after delivery of a successful defibrillation shock, the width of intrinsic p-waves are monitored and bi-atrial pacing is temporarily initiated if the width exceeds a preset or programmable threshold.

Described are devices, methods and systems useful for achieving occlusion of vascular vessels. Percutaneous procedures can be used to occlude and obliterate the greater saphenous vein, for example in the treatment of varicose vein condition caused by venous reflux. Certain embodiments encompass the deployment and filling of an inflatable occlusion device via a percutaneous procedure, so as to occlude or obliterate a portion of a vascular vessel.

This invention is an improved method and device for treating varicose veins 200 or the greater saphenous vein 202. The method comprises the use of infrared laser radiation in the region of 1.2 to 2.2 um in a manner from inside the vessel 200 or 202 such that the endothelial cells of the vessel wall 704 are damaged and collagen fibers in the vessel wall 704 are heated to the point where they permanently contract, the vessel 200 or 202 is occluded and ultimately resorbed. The device includes a laser 102 delivering laser energy via a fiber optic catheter 300. A motorized pull back device 104 may be used. The laser is preferably operated under laser energy delivery conditions that substantially prevent the formation of coagulum on the energy emitting tip of the fiber.

The invention discloses a novel inversion-preventing great saphenous vein stripper chuck. A longitudinal assembling slot is arranged on a main body of the novel inversion-preventing great saphenous vein stripper chuck; one end of the main body is provided with a round blocking surface; a round concave groove which is concentric with the assembling slot is arranged in the middle of the round blocking surface; the assembling slot is used for blocking and stopping a rope body and a blocking block of a pulling rope; the round blocking surface is used for blocking a vessel in a vessel stripping process, thereby avoiding the vessel from inversing; a clamping part is arranged on the other end of the main body far away from the assembling slot. With the adoption of the mode, the stripped vessel is effectively avoided from the inversion phenomenon in an operation, and the damages to endangium and peripheral vessel tissues of the stripped vessel are reduced furthest; with the special chuck design, only the pulling rope penetrates the vessel, so that the penetrating property of the product is improved and the product is convenient to operate.

A varicose vein peeling device is provided. A spiral guiding head end (1) is connected with a tail end (4) via a plastic guide wire (2); at least four separation blocks (3) are arranged on the plastic guide wire (2); each spherical crown clamping peeling head (5) is formed by a round crown head (5-1) and a round truncated cone seat (5-2) axially clamped with each other; a center hole (5-4) is formed in an axial middle parts of the round crown head (5-1) and the round truncated cone seat (5-2); and an opening side slot (5-3) is respectively formed between outer walls of the round crown head (5-1) and the round truncated cone seat (5-2) and the center hole (5-4). The peeling head rotary clamping assembling structure is rationally structured and smartly designed; peeling heads of various external diameters can be conveniently selectively assembled and exchanged; great saphenous veins and varieose branch veins with lesions can be accurately peeled in a soft and smooth way on the whole; peeling trajection can be easily implemented; friction force of cutting surface tissues can be reduced; vasculopaty parts can be easily passes through; the peeling head cannot fall off, so operational risk can be reduced; and the varicose vein peeling device can be flexibly operated and reduce patient pains and blooding time.

An implantable system for the defibrillation of the atria of a patient's heart comprises (a) a first catheter configured for insertion into the right atrium of the heart; a first atrial defibrillation electrode carried by the first catheter and positioned to stimulate Bachmann's bundle, or positioned at the atrial septum of the heart (i.e., an atrial septum electrode); (b) a second atrial defibrillation electrode which together with the first atrial defibrillation electrode provides a pair of atrial defibrillation electrodes that are configured for orientation in or about the patient's heart to effect atrial defibrillation, and (c) a pulse generator operatively associated with the pair of atrial defibrillation electrodes for delivering a first atrial defibrillation pulse to the heart of the patient. The second electrode may be configured for positioning through the coronary sinus ostium and in the coronary sinus or a vein on the surface of the left ventricle, such as the great vein. An additional electrode configured for positioning in the superior vena cava, right atrium (including the right atrial appendage, or the right ventricle may also be included, and the pulse generator may be configured or programmed for concurrently delivering a first defibrillation pulse through the additional electrode and the atrial septum electrode, and a second defibrillation pulse through the atrial septum electrode and the second electrode. Electrode assemblies and methods useful for carrying out the invention are also disclosed.

This invention is an improved method and device for treating varicose veins 200 or the greater saphenous vein 202. The method comprises the use of infrared laser radiation in the region of 1.2 to 1.8 um in a manner from inside the vessel 200 or 202 such that the endothelial cells of the vessel wall 704 are damaged and collagen fibers in the vessel wall 704 are heated to the point where they permanently contract, the vessel 200 or 202 is occluded and ultimately resorbed. The device includes a laser 102 delivered via a fiber optic catheter 300 that may have frosted or diffusing fiber tips 308. A motorized pull-back device 104 is used, and a thermal sensor 600 may be used to help control the power required to maintain the proper treatment temperature.

Provided is a pull assistance device for varicosity stripping. A cavity is formed in the front upper portion of a handle (1) to serve as a machine cabin (102), the upper end of the machine cabin (102)is provided with an opening, the upper end of a puller (2) extends out of the opening, the lower portion of the puller (2) is connected with a wire compression block (3) through a transmission mechanism, a wire clamping groove (4) is longitudinally formed in the lower portion of the front end of the handle (1), a pressure bearing block (6) is fixed to the lower edge of the wire clamping groove (4), the bottom surface of the wire compression block (3) is at the upper portion of the wire clamping groove (4), the bottom surface of the wire compression block (3) is provided with compression teeth(303), and the top surface of the pressure bearing block (6) is provided with bearing teeth (601). By arranging the transmission mechanism, the pull assistance device can be easily operated in use, astable and enough guide wire clamping action force can be obtained, an assembly structure design is exquisite and reasonable, the operation is flexible, stripping and penetration are implemented easily, tissue damage is less, the pain of a patient is relieved, the bleeding time is shortened, wounded surfaces are decreased, installation and replacement are quick and convenient, the accurate efficiency of stripping diseased great saphenous veins and cirsoid branch veins is improved, and the surgical risk is reduced.

The invention discloses a self-locking clamping head device of a great saphenous vein stripping catheter. The device comprises a clamping head nut and a self-locking screw, a jamming position is arranged at the top of the self-locking screw, a self-locking thread is arranged in the middle of the outer side of the self-locking screw, a taper guiding piece is arranged at the lower end of the self-locking screw, and a longitudinal assembling groove is formed in the inner side of the self-locking screw; a longitudinal inner thread matched with the self-locking screw is arranged in the middle of the inner side of the clamping head nut, a taper groove is formed in the lower end of the inner side of the clamping head nut, a round hole concentric with the longitudinal assembling groove of the self-locking screw is formed in the bottom of the clamping head nut, and the round hole is communicated with the taper groove. The self-locking clamping head device is simple in structure, a blood vessel and a stripping head are fixed with an arc clamping head nut body and the self-locking screw, operation threads used in traditional operations are substituted for fixing the blood vessel and the stripping head, the working efficiency can be effectively improved, operation time can be effectively shortened, and patient pains can be alleviated.

The invention relates to the technical field of surgical items, in particular to a great saphenous vein drawing and peeling tunnel hemostat. The great saphenous vein drawing and peeling tunnel hemostat comprises a left clamping arm and a right clamping arm, wherein the left clamping arm and the right clamping arm are crossed and are hinged to each other; the clamping arms on the upper portion of a hinged shaft form a handheld portion; lower portions of the left clamping arm and the right clamping arm on the lower portion of the hinged shaft are clamping portions; soft pads are respectively arranged on opposite inner side walls of the two clamping portions; one end of a spring is arranged on the left clamping arm or the right clamping arm between the hinged shaft and the clamping portions; the other end of the spring is arranged on the right clamping arm or the left clamping arm between the hinged shaft and the clamping portions; and the tightness of the spring can be adjusted. The great saphenous vein drawing and peeling tunnel hemostat has the advantages that in a great saphenous vein drawing and peeling surgery, labor and vigor which are required in the surgery are reduced, the mental stress of medical staff is greatly relieved, the safety of the surgery is improved, and the efficiency of the surgery is also improved obviously.

An implantable system for the defibrillation of the atria of a patient's heart comprises (a) a first catheter configured for insertion into the right atrium of the heart, preferably without extending into the right ventricle of the heart; a first atrial defibrillation electrode carried by the first catheter and positioned at the atrial septum of the heart (i.e., an atrial septum electrode); (b) a second atrial defibrillation electrode which together with the first atrial defibrillation electrode provides a pair of atrial defibrillation electrodes that are configured for orientation in or about the patient's heart to effect atrial defibrillation, and (c) a pulse generator operatively associated with the pair of atrial defibrillation electrodes for delivering a first atrial defibrillation pulse to the heart of the patient. The second electrode may be configured for positioning through the coronary sinus ostium and in the coronary sinus or a vein on the surface of the left ventricle, such as the great vein. An additional electrode configured for positioning in the superior vena cava, right atrium (including the right atrial appendage, or the right ventricle may also be included, and the pulse generator may be configured or programmed for concurrently delivering a first defibrillation pulse through the additional electrode and the atrial septum electrode, and a second defibrillation pulse through the atrial septum electrode and the second electrode. Electrode assemblies and methods useful for carrying out the invention are also disclosed.

The invention relates to a mitral valve repair device with a protection structure, and belongs to the technical field of medical instruments. The device comprises an atrial septum anchoring device I, a coronary sinus great vein or heart wall anchoring device II and a draft line, The draft line is arranged between the atrial septum anchoring device I and the coronary sinus great vein or heart wall anchoring device II. And a structure for protecting cardiovascular tissues is arranged between at least one of the anchoring device I and the anchoring device II and the draft line. The technical problem that the atrial wall is damaged due to the fact that the atrial wall is rubbed by the contact position of a fixing pipe and the drafting line is solved. The friction damage of the mitral valve repair device to the atrial wall can be effectively relieved. The injury caused by the puncture of the atrial wall can be closed. Healing of a puncture opening can be promoted. And the fixing tube can be fixed to ensure that the instrument does not shift, so that the instrument stably plays a role.

The invention relates to the field of medical equipment, in particular to a great saphenous vein detacher. The great saphenous vein detacher comprises a metal wire and a detacher head, wherein the detacher head is connected to one end of the metal wire, the other end of the metal wire is fixedly connected with a fixing plate, the fixing plate is provided with an air bag, the metal wire is providedwith a communication cavity, the detacher head has elasticity, the detacher head is provided with a cavity, the detacher head is communicated with the air bag through the metal wire, the outer side of the fixing plate is provided with a slow moving mechanism, a fixing frame is connected between the slow moving mechanism and the fixing plate, the fixing plate is slidably connected to the fixing frame, the fixing plate is provided with a chuck clamped on the fixing frame, the slow moving mechanism is provided with a pushing handle, and the slow moving mechanism is provided with a squeezing mechanism used for squeezing the air bag, and a connecting mechanism is detachably connected between the slow moving mechanism and the fixing plate. The great saphenous vein detacher has the advantages that the detacher head moves slowly in the vein, and the pain of a patient is reduced.

The invention relates to the technical field of intimal hyperplasia, in particular to a preparation method and application of a hyaluronic acid-heparin adhered acellular great saphenous vein patch. The preparation method of the hyaluronic acid-heparin adhered great saphenous vein patch comprises the following steps of (1) taking out great saphenous veins in vivo, putting the great saphenous veinsin heparin saline at 4 DEG C, and carrying out decellularization treatment by adopting 1% SDS; adopting hyaluronic acid surface adhesion for the decellularized great saphenous vein, and the adopting the heparin surface adhesion to prepare a hyaluronic acid-heparin adhered decellularized great saphenous vein patch; and (2) implanting the hyaluronic acid-heparin adhered acellular great saphenous vein patch in vivo. After the hyaluronic acid-heparin is adhered to the acellular great saphenous vein, the surface of the great saphenous vein becomes smooth; the hyaluronic acid-heparin adhered acellular human great saphenous vein patch has a relatively strong antithrombotic effect in vitro; and in vivo, intimal hyperplasia thickness can be significantly reduced after venous and arterial patch formation.

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.

The invention discloses a great saphenous vein infusion fixator for the foot of a child. The great saphenous vein infusion fixator comprises a fixator body which comprises an airbag, a foot-shaped cavity is arranged in the airbag, the airbag is connected with an air pump, a pressure sensor is arranged in the airbag, a temperature sensor is arranged on the outer wall of the inner side of the airbag and connected with a microprocessor through a pressure signal processing circuit, the temperature sensor is connected with the microprocessor through a temperature control module, and the microprocessor is connected with the air pump through an air pump driving circuit. The fixator can well restrain activities of the foot of the child and keep a vein access unblocked; the foot of the child is in a comfortable functional position, and the comfortable sensation of the child is guaranteed; in addition, a heating function is achieved, the foot can be kept at an appropriate temperature in cold seasons such as winter, and the foot is prevented from becoming cold.

The invention discloses a treatment stocking applied after an operation of varicosis of great saphenous vein. The stocking comprises a stocking body, wherein the stocking body comprises a foot part, a shank section and a thigh section, wherein a cracked part is formed at a position of the shank part corresponding to the part in front of a shank shin; pull buckle positions which combine two sides of the cracked part into a whole are disposed on the two sides of the cracked part; and the pull buckle device is composed of multiple pull buckle units which are arranged along the length direction of the cracked part. After the operation of varicosis of great saphenous vein, the stocking body of the treatment stocking applied is worn after the operation of varicosis of great saphenous vein; then the shank and thigh parts of the stocking are lifted; and after fixation of the thigh section, the pull buckle devices of the shank section are buckled according to a patient's situation. In this way, the whole wearing course is completed. The courses are simple, time-saving and effort-saving; and the treatment stocking can completely avoid touch of the patient's wounds and can relieve the patient's pains. One person can complete the whole wearing course of the treatment stocking; and during changing of fresh wound dressing, the patient can rationally release and buckle hidden pull hooks according to wound positions, so repeated wearing and wearing-off could be avoided; the patient feels comfortable and conducts operations conveniently; and time consumption is reduced.