16 results about "Lumen Diameter" patented technology

An interventional system is used to treat a lesion in a target anatomy. The interventional system includes a balloon catheter and a guidewire. The balloon catheter includes a balloon coupled to a catheter shaft. The catheter shaft includes a guidewire lumen having a lumen diameter. The guidewire includes a coil tip coupled to a guidewire shaft at a proximal joint. A coil diameter of the coil tip at the proximal joint is larger than the lumen diameter of the catheter shaft. The interventional system can be used to access and treat the lesion in the target anatomy. Other embodiments are also described and claimed.

Devices and methods to treat a diseased portion of an aorta. A method of implanting an endoprosthesis within the aorta may include positioning the endoprosthesis within the aorta in a collapsed state with a constraint and deploying the endoprosthesis to the deployed diameter. The aorta has a true lumen and a false lumen due to the aorta having a defect, the true lumen defining a true lumen diameter and the false lumen formed by a false lumen wall defining a false lumen diameter. The deployed diameter of the endoprosthesis is such that the endoprosthesis extends along the true lumen and along at least a portion of the false lumen at a position where the defect is located in the aorta such that the endoprosthesis defines a flow bypass through a diseased portion of the aorta.

The present disclosure provides systems and methods for determining an external elastic lamina (“EEL”) value for intravascular image frames and using the predicted EEL to determine a plaque burden for respective image frames. The predicted EEL value may be determined based on a threshold number of image frames within a region of interest having plaque burden below a threshold plaque burden. In some examples, the predicted EEL value may be determined as a function of intima thickness and media thickness and the H-K model derived expected lumen diameter. The determined plaque burden and visible EEL arc may be used to automatically identify lesions and suggest candidate treatment zones.

The present invention provides a high-pressure fluid apparatus. The high-pressure fluid apparatus comprises a housing, a tube, and a stationary phase medium. The housing includes a first component having a first contact surface and a second component having a second contact surface. The first and second components are fixable to each other by their opposing contact surfaces, forming a contact portion between them. The housing includes a channel extending along the contact portion through the first component to the contact portion. The tube extends along the channel. The tube defines a lumen having a substantially circular cross-section with a lumen diameter of 1000 μm or less. The stationary phase medium is positioned in the lumen. The stationary phase medium is suitable for chromatographic separation of compounds present in a liquid sample.

The invention discloses a blood vessel lumen diameter calibration method and device, equipment, a medium and a product, and the method comprises the steps: obtaining first-type blood vessel image data and second-type blood vessel image data of a first object, and the registration relation between the first-type blood vessel image data and the second-type blood vessel image data; according to the registration relationship, determining a diameter mapping relationship between the first type of blood vessel image data and the second type of blood vessel image data based on a first blood vessel diameter of the first type of blood vessel image frame and a second blood vessel diameter of the second type of blood vessel image frame; according to a diameter mapping relation, adjusting a blood vessel diameter corresponding to a blood vessel image frame in the first type of blood vessel image data to obtain a target intracavity blood vessel diameter; and mapping the target intracavity blood vessel diameter to the blood vessel diameter of the corresponding second type blood vessel image frame in the second type blood vessel image data. According to the technical scheme provided by the embodiment of the invention, the external image of the blood vessel can be calibrated by utilizing high precision of the intracavity image.

The utility model provides a lumen instrument cleaning rack which comprises a first clamping plate, a second clamping plate and a plurality of vertical guide rods, and the first clamping plate and the second clamping plate are arranged in parallel and connected with the vertical guide rods. The first clamping plate is provided with a plurality of insertion holes allowing lumen instruments to be inserted therein, and the insertion holes are provided with elastic limiting pieces. A plurality of bottom grooves are formed in the second clamping plate; the penetrating holes and the bottom grooves are arranged in a one-to-one correspondence mode. The lumen instrument cleaning frame is convenient to use, can assist in cleaning the lumen instruments in batches, and can be suitable for the lumen instruments with different lumen diameters and lengths.

A guide extension catheter can comprise an elongate tube member, a push member, and a concave track. The elongate tube member can define a lumen and three distinct portions of different diameter. A distal portion can define a first diameter, a proximal portion can define a second diameter which is larger than the first diameter but smaller than a lumen of a guide catheter with which the guide extension catheter is used, and a tapered portion, positioned between the distal portion and the proximal portion, can have a variable diameter. The push member can be eccentrically coupled relative to the tube member and extends proximally therefrom for slidably positioning the tube member within and partially beyond a distal end of the guide catheter. The concave track forms a transition between the tube member and the push member, and defines a partially cylindrical opening leading into the tube member.

Medical devices for applying a cinch to a suture and methods for making and using such devices are disclosed. An example medical device may include an elongated shaft including a proximal region and a distal region. The distal region may define a lumen having a lumen dimeter, and a distally facing end surface. The medical device may also include an outer cinch member defining a bore and having an outer surface defining a shoulder. An elongated inner shaft may extend through and be longitudinally movable within the lumen and the bore and including a distal end section. An inner cinch member may be engaged with the distal end section of the elongated inner shaft.

The utility model relates to the technical field of surgical instruments, in particular to a human body urinary tract inner diameter measuring instrument which comprises a measuring catheter and a rotating sleeve, the measuring catheter is of a hollow tube body structure, and one end of the measuring catheter is provided with a positioning bag cavity used for being fixed in a bladder. An air hole is formed in the position, located in the positioning bag cavity, of the measuring catheter, and the air hole is communicated with the positioning bag cavity and the measuring catheter; the rotating sleeve is arranged on the outer side surface of the measuring catheter in a sleeving mode, and a displacement sensor is arranged at the end, close to the positioning bag cavity, of the rotating sleeve. And a rotating sleeve is arranged at the other end of the rotating casing pipe, and the rotating sleeve is rotationally connected with the rotating casing pipe. The novel resectoscope effectively solves the problems that the existing resectoscope cannot adapt to differences of different races, so that the existing resectoscope cannot be used due to urethrostenosis in domestic operations or the urethra is easily damaged when the existing resectoscope is used, and the like.

A vascular access kit includes a sheath (12) and dilator (14). The sheath has a shaft with a hemostatically-sealed proximal hub and lumen. The dilator has a dilator shaft (20) and a head (42) attached to the distal end of the dilator shaft. The head includes a cylindrical proximal portion (44) and a tapered distal portion (46), as well as at least one channel (48) extending longitudinally along an outer wall of the proximal portion. If the outer diameter of the cylindrical proximal portion of the head is approximately equal to the sheath lumen diameter, it will create a pressure seal between the head and the sheath; the channel allows fluid (e.g., blood) to pass this pressure seal, thus mitigating negative pressure transients that may form on the distal side of the head as the dilator is withdrawn from the sheath.

The present application relates to a method of using a self-adjusting stent assembly and a kit comprising the same. A method of using a self-adjusting stent assembly, comprising: estimating a body lumen diameter associated with a portion of a body lumen in which the stent assembly is to be placed; determining a target expanded stent diameter of the stent assembly to be placed in the portion of the body lumen based on the estimated diameter; selecting a stent assembly for stent implantation of the portion of the body lumen, wherein the stent assembly is configured to expand from an initial diameter to an expanded diameter within an expanded diameter range; wherein the expanded diameter range is from about 9 mm to about 5.5 mm; and wherein the target expanded stent diameter is within the expanded diameter range; and applying a persistent radial force to a wall of the portion of the lumen, wherein the radial force is less than about 0.33 N / mm.

An implant delivery system for implanting an implant for reducing a luminal diameter of a vessel, including: an implant being configured to be anchored to an inner wall (W) of the vessel (V) and to contract so as to reduce the luminal diameter of the vessel (V), and a catheter including a catheter sheath and an expansion device for expanding and deploying the implant at an implantation side in the vessel (V).

Implant delivery systems for delivering sheet-like implants include a delivery shaft, an implant expander, a sheath, and a sheet-like implant. In some embodiments, the delivery shaft has a proximal end and a distal end. The implant expander is mounted to the distal end of the delivery shaft. The implant expander includes a central portion and a plurality of leg portions radiating from the central portion. The implant expander is evertable between an unstressed configuration in which a distal surface of the implant expander defines a concave surface, and a first compact configuration in which the distal surface of the implant expander defines a convex surface. The implant expander has a first lateral extent when the implant expander is free to assume the unstressed configuration. The sheath defines a lumen having a lumen diameter. At least a portion of the delivery shaft is slidably disposed in the lumen. The lumen diameter is smaller than the first lateral extent of the implant expander so that the sheath holds the implant expander in the first compact configuration when slidably disposed therein. The sheet-like implant overlays at least a portion of the distal surface of the implant expander with portions of the sheet-like implant extending between the leg portions of the implant expander and the sheath. Methods of treating a rotator cuff of a shoulder are also disclosed.

A delivery sheath includes an outer tubular layer and an initially folded inner tubular layer. When an implant passes therethrough, the outer tubular layer expands and the inner tubular layer unfolds into an expanded lumen diameter. The sheath may also include selectively placed longitudinal support rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion, thereby reducing the push force needed to advance the implant through the sheath's lumen.

Devices and methods to treat a diseased portion of an aorta. A method of implanting an endoprosthesis within the aorta may include positioning the endoprosthesis within the aorta in a collapsed state with a constraint and deploying the endoprosthesis to the deployed diameter. The aorta has a true lumen and a false lumen due to the aorta having a defect, the true lumen defining a true lumen diameter and the false lumen formed by a false lumen wall defining a false lumen diameter. The deployed diameter of the endoprosthesis is such that the endoprosthesis extends along the true lumen and along at least a portion of the false lumen at a position where the defect is located in the aorta such that the endoprosthesis defines a flow bypass through a diseased portion of the aorta.

The present disclosure provides for an imaging probe with a rotatable core which allows for rotating imaging assembly that is larger in diameter than the lumen in which the rotatable core resides, as well as methods to construct said probes. The imaging probes are generally elongate flexible imaging catheters for use in cardiovascular procedures. The ability to have a smaller lumen to hold the rotatable core simplifies the inclusion of other functional components to the catheter and may improve the quality of the images produced.