16 results about "Vascular catheter" patented technology

The invention relates to the technical field of medical instruments, in particular to a blood vessel catheter based on a miniature pressure sensor, comprising: a catheter having a head and a tail opposite to the head, the tail being provided with a connector; a detection part of the miniature pressure sensor is attached to the outer wall or the inner wall of the head part of the catheter, and an electrode part of the miniature pressure sensor extends to the tail part of the catheter along the catheter; a battery is arranged in the wireless transmission device, the wireless transmission device is packaged outside the connector, and the wireless transmission device is electrically connected with the electrode part of the micro pressure sensor. The miniature pressure sensor and the vascular catheter are integrally designed, and the wireless transmission technology is adopted, so that the problem that the movement of a patient is limited is solved.

A surgical clip applier and methods for applying surgical clips to a vessel, duct, shunt, etc., during a surgical procedure are provided. In one exemplary embodiment, a surgical clip applier is provided having a housing with a trigger movably coupled thereto and a shaft extending therefrom with opposed jaws formed on a distal end thereof. The trigger is adapted to advance a clip to position the clip between the jaws, and to move the jaws from an open position to a closed position to crimp the clip positioned therebetween. The surgical clip applier can include a variety of features to facilitate use of the device, including features to prevent misalignment of the jaws and clip therebetween, features to protect the jaws, and features to ensure proper closure of the jaws and clip therebetween.

A neurovascular catheter may include an elongate flexible body having a length of at least about 130 cm. The catheter can include a distal portion including a pre-shaped tip and having a length between about 2 cm to 9 cm, a transitional portion proximal to the distal portion that is less flexible than the distal portion, wherein the transitional portion has a length of between about 14 cm and about 16 cm; and a proximal portion proximal to the transitional portion that is less flexible than the transitional portion. The proximal portion has a length between about 110 cm and about 115 cm. A flexibility profile of the elongate flexible body is measurable with a cantilever beam test to determine a stiffness measures in peak load value / distance.

An intravascular device with an improved attachment of its elements is provided. The intravascular device comprises a vascular catheter comprising a catheter jacket, an inner catheter element surrounded by the catheter jacket, and a distal connection portion, the distal connection portion comprising an extended portion of the inner catheter element extending distally beyond a distal end of the catheter jacket; a tool attached to, and extending from, the distal connection portion of the vascular catheter, the tool comprising a proximal connection portion; and an attachment between the tool proximal connection portion and the vascular catheter distal connection portion adapted to keep the tool connected to the vascular catheter, the attachment having an outer diameter substantially equal to an outer diameter of the vascular catheter. A method of attaching a tool to a vascular catheter is also provided.

The invention discloses an improved and simplified modeling method of a rat middle cerebral artery embolism ischemia model and an auxiliary precise thrombus pushing device.According to the modeling method, standardized thrombus embolism is prepared through an in-vitro step, and the modeling method comprises the steps that blood is incubated in a PE-50 catheter at the specific temperature for the specific time to form initial thrombus; the diameter is accurately controlled to be smaller than 0.14 mm through reciprocating push-pull and negative pressure folding suction of a PE-10 catheter; then, loading the emboli by using a normalized vascular catheter with a 20mm pre-mark; during modeling, the catheter is inserted to a preset depth through an external carotid artery, and the thrombus is pushed into a target blood vessel at a constant speed of 10-20 [mu] L / min by means of an auxiliary precise thrombus pushing device. The core problems of poor thrombus quality and low model stability and repeatability of a traditional method are effectively solved by optimizing the whole process of thrombus preparation, catheter specification, pushing rate and verification standard in combination with a special device, the success rate of the model can reach 90% or above, and an efficient and reliable experimental tool is provided for cerebral apoplexy research.

A catheter is provided comprising localized regions of modified flexibility. The regions of modified flexibility may comprise a softened inner liner, for example softened via stretching the inner liner or disposing a plurality of holes in the inner liner, to modify the bending stiffness and / or tensile stiffness of the catheter. The catheter may further include an axially extending filament that at least partially overlaps the softened portion of the inner liner. The axially extending filament may include an anchoring section to anchor the at least one axially extending filament in a section of the catheter that includes the helical coil.

Devices and methods for vascular navigation, assessment and / or diagnosis are described which determine the location of the tip of a vascular catheter using the introduction of a medium with a measurable parameter (e.g., temperature, light reflection, sound reflection, etc.) and sensing and measuring the measurable parameter as the catheter is advanced. Measurements of the parameter are tracked over time, recorded and analyzed. The value of the parameter and / or the shape of the parameter value vs. time curve may be used in the analysis. For example, curve amplitude, variability, standard deviation, slope, etc. may be used in the analysis of catheter location.

A neurovascular catheter may include an elongate flexible body having a length of at least about 130 cm. The catheter can include a distal portion including a pre-shaped tip and having a length between about 2 cm to 9 cm, a transitional portion proximal to the distal portion that is less flexible than the distal portion, wherein the transitional portion has a length of between about 14 cm and about 16 cm; and a proximal portion proximal to the transitional portion that is less flexible than the transitional portion. The proximal portion has a length between about 110 cm and about 115 cm. A flexibility profile of the elongate flexible body is measurable with a cantilever beam test to determine a stiffness measures in peak load value / distance.

A catheter for navigating tortuous vasculatures to reach distant anatomies. The catheter may have an optimal stiffness profile so that a physician may safely and efficiently advance large bore catheters through such tortuous vasculatures. The catheter may have a greater stiffness at its proximal end than at its distal end such that the stiffness of the intravascular catheter decreases between its proximal and distal ends. A core wire may extend through proximal and medial segments catheter to impart the desired stiffness. The core wire may be tapered at certain segments and may terminate prior to the distal end of the catheter such that the catheter is more flexible at or near its distal end. The distal end of the core wire may coil around the liner tube of the intravascular catheter. Multiple core wires each having different lengths may be utilized.

A method of manufacturing a therapeutic material incorporating a soft thermoformable elastomer with a phase change material exhibiting high latent heat of fusion. The compound provides elasticity, softness, formability, and heat over an extended duration and to facilitate prolonged skin contact at elevated temperatures. Used in combination with active ingredients the increased temperature and formability provides enhanced transdermal delivery through the skin. Thermoplastic elastomers may be manufactured by mixing together plasticizing oil, a triblock copolymer, a paraffinic substance and one or more additives, e.g., an antioxidant, an antimicrobial agent, and / or other additives to form a mixture which melted then cooled into the thermoplastic elastomer. During cooling, the thermoplastic elastomer may be molded or otherwise formed into any number of articles including, but not limited to, prosthetic liners, prosthetic sleeves, external breast prostheses, breast enhancement bladders, masks, wound dressing sheets, wound dressing pads, socks, gloves, malleolus pads, metatarsal pads, shoe insoles, urinary catheters, vascular catheters, and balloons for medical catheters both vascular as well as urinary. Active ingredients are preferably added to the cooling thermoplastic elastomer when the temperature is below 100° F. to prevent heat degradation and / or breakdown of vital proteins.

Devices, systems, and methods are provided for treating or preventing heart failure or symptoms of heart failure by coordinated disruption of neural activity to one or more target nerves. A device disclosed herein may include a vascular catheter comprising a retractable needle assembly configured to puncture vascular tissue in contact with the catheter, the needle assembly comprising one or more electrodes configured to deliver electrical energy to tissue in contact with one or more electrodes. A method may include treating or preventing heart failure or symptoms of heart failure by inserting the catheter into the vascular tissue of a patient, guiding the catheter toward the greater splanchnic nerve, puncturing the patient's vascular tissue with a retractable needle assembly extending outward from the catheter toward the target nerve, and dissecting the target nerve by delivering stimulating energy to the target nerve using one or more electrodes.

The invention discloses a method, system, equipment and medium for linkage of an OCT system and an injection pump, and relates to the technical field of injection.The method comprises the steps that OCT scanning is conducted on a blood vessel, and an OCT image is obtained; segmenting the OCT image to obtain a binary mask of a blood vessel wall and a catheter wall, extracting a central axis of a single pixel width of the binary mask, calculating blood vessel-catheter tangential direction differences point by point in an overlapped projection area of the blood vessel and the catheter, and taking a median of all the blood vessel-catheter tangential direction differences as a final coaxiality evaluation value; and after the final coaxiality evaluation value is greater than a set value, triggering a smoking push injection mode of the injection pump, triggering a pull-back push injection mode according to the effect of the smoking push injection mode, dynamically adjusting the radiography push injection speed, and automatically starting OCT pull-back until the OCT image is displayed and flushed. According to the method, on the basis of an injection speed self-adaptive adjustment mechanism of image quality, the use efficiency of a contrast agent is optimized on the premise that a safe pressure threshold value is guaranteed.

Devices and methods for vascular navigation, assessment and / or diagnosis are described which determine the location of the tip of a vascular catheter using the introduction of a medium with a measurable parameter (e.g., temperature, light reflection, sound reflection, etc.) and sensing and measuring the measurable parameter as the catheter is advanced. Measurements of the parameter are tracked over time, recorded and analyzed. The value of the parameter and / or the shape of the parameter value vs. time curve may be used in the analysis. For example, curve amplitude, variability, standard deviation, slope, etc. may be used in the analysis of catheter location.

The present application relates to umbilical vessel catheter treatment technical field, disclose a kind of umbilical vessel catheter fixing device and method, including elastic tablet, top cover, bottom cover and medical silica gel, the top of the elastic tablet is fixedly connected to the bottom surface of top cover, the bottom surface of top cover and the top surface of bottom cover are fixedly connected with connecting structure, the top cover can be fixed in the upper portion of bottom cover by connecting structure, the bottom of bottom cover is connected with medical silica gel by connecting sheet, the connecting sheet, top cover, bottom cover and medical silica gel are all provided with through channel, the connecting structure includes first side skirt and second side skirt, the top surface of first side skirt is fixedly connected to the bottom surface of top cover. By utilizing the second side skirt of bottom cover upper surface can be connected with the first side skirt of top cover lower surface by external thread and internal thread thread, to solve the problem that the structure of traditional fixed umbilical vessel catheter device is more, thereby causing the problem of cumbersome operation.

A neurovascular catheter is provided, such as for distal neurovascular access or aspiration. The catheter includes an elongate flexible tubular body, having a proximal end, a distal end and a side wall defining a central lumen. A distal zone of the tubular body includes a tubular inner liner, a tie layer separated from the lumen by the inner liner, a helical coil surrounding the tie layer, an outer jacket surrounding the helical coil, and an opening at the distal end. Adjacent windings of the helical coil are spaced progressively further apart in the distal direction. The opening at the distal end of the tubular body is enlargeable from a first inside diameter for transluminal navigation to a second, larger inside diameter to facilitate aspiration of thrombus into the lumen.

The utility model relates to the technical field of chemotherapy equipment, and discloses a chemotherapy pipeline structure which comprises a chemotherapy pipeline bag, a 6F blood vessel catheter sheath, a dilator and a puncture needle. Three independent components including a 6F blood vessel catheter sheath, a dilator and a puncture needle are arranged in the chemotherapy catheter bag, a side arm is arranged at one end of the 6F blood vessel catheter sheath, a catheter sheath connecting tube is arranged at one end of the top of the side arm, and a three-way valve is arranged at the other end of the catheter sheath connecting tube. According to the pipeline structure for chemotherapy, through the design of the 6F blood vessel catheter sheath, the dilator and the puncture needle, the clinical problems that catheter indwelling is difficult, pain is obvious, and wounds need to be sutured after catheter drawing are solved, meanwhile, the 6F blood vessel catheter sheath is made of medical-grade plastic, and by combining the Seldinger catheter indwelling technology and the design of the internal puncture hollow needle, the catheter indwelling effect is good, and the catheter indwelling effect is good. The problems of difficulty in catheterization, remarkable pain, need of suture after tube drawing and the like in hyperthermic intraperitoneal perfusion chemotherapy are effectively solved.