30 results about "Filter retrieval" patented technology

The present invention provides a removable vena cava filter for capturing thrombi in a blood vessel. The filter comprises a plurality of primary struts having first ends attached together along a longitudinal axis. Each primary strut has an arcuate segment extending from the first end to an anchoring hook. The primary struts are configured to move between an expanded state for engaging the anchoring hooks with the blood vessel and a collapsed state for filter retrieval or delivery. Each primary strut are configured to cross another primary strut along the longitudinal axis in the collapsed state such that the arcuate segments occupy a first diameter greater than a second diameter occupied by the anchoring hooks in the collapsed state for filter retrieval or delivery.

Distal protection filter retrieval devices and methods of retrieving a distal protection filter. A filter retrieval catheter may comprise an inner tube, an outer tube disposed over the inner tube, an annular lumen disposed between the inner tube and the outer tube, and a tapered member coupled to the lumen. The tapered member may be movable between a first position for passing a lesion and a second position retrieving a filter.

Methods and devices for retrieving a filter fixed to a guidewire disposed within a blood vessel are disclosed. A catheter for retrieving a filter fixed to a guidewire disposed within a blood vessel in accordance with the present invention includes an elongate shaft and a housing fixed to the elongate shaft proximate a distal end thereof. A tip member is slidingly disposed within a cavity defined by the housing. In a preferred embodiment, the tip member is configured such that the housing is substantially centered about the guidewire. In another preferred embodiment, the tip member is slidingly disposed within the housing, and the tip member may be moved between a first position and a second position.

A filter retrieval system for retrieving a previously implanted medical filter, and methods of using the retrieval system, are disclosed. The filter retrieval system has a flexible shaft, a retrieval element, and a handle with an actuator. The flexible shaft may be catheter-based, and has a proximal and a distal end, and has an opening near its distal end. The handle is affixed to the shaft near the proximal end of the shaft, and the actuator is adapted to manipulate the retrieval element. When an operator manipulates the actuator, the retrieval element is adapted to protrude slightly from the shaft opening. As the actuator is operated, the retrieval element can grasp or hook or otherwise engage a portion of the filter, and then pull the filter in through the opening into a passage or lumen of the catheter shaft. The retrieval system may be capable of retrieving a filter in either a proximal or a distal direction as desired.

The invention provides an intelligent inquiring diagnosis system and method. The system comprises a structured medical knowledge storage unit configured for storing structured medical knowledge information with a plurality of entity tags, a policy generation unit configured for mining the structured medical knowledge information to generate a filtering policy, a retrieval unit configured for receiving medical consulting information or feedback information and retrieving the structured medical knowledge information with the entity tags corresponding to the medical consulting information or the feedback information, and a filtering unit configured for filtering retrieval results according to the filtering policy, judging a filtering result according to a preset rule to select operation of generating and outputting a problem according to the filtering result to prompt a user to input the feedback information or operation of generating and outputting inquiring diagnosis result information according to the filtering result. According to an inquiring diagnosis mechanism provided by the invention, an inquiring diagnosis path is dynamically generated for each inquiring diagnosis, and the path and result generation is evidence-based, so that the accuracy and deepness of an inquiring diagnosis result are guaranteed.

A filtering apparatus having a filter retrieval apparatus, an integrated jib, and a clamping assembly for providing a seal between a filter and a cabinet.

Embolic protection aspirators and methods for extracting debris from the vasculature during interventional procedures are provided. One such system may include an aspirating filter delivery catheter having a filtration device, an operable end cap, and a plurality of aspiration ports. The delivery catheter may be fluidly coupled to a suction providing means for extracting debris while traversing a target site for distal delivery of the filtration device. Another such system may include an aspirating filter retrieval catheter having an aspiration lumen and a balloon. The aspiration lumen may be fluidly coupled to a suction providing means for extracting debris from the filtration device prior to and/or during retrieval of the filtration device. By inflating the balloon to partially or fully restrict blood flow, suction pressure proximal of the filtration device may be increased to enhance debris extraction.

A filter retrieval catheter for retrieving an embolic protection filter (50) from a vasculature. The catheter comprises a catheter shaft (2) having a rapid exchange guidewire opening (4) in a sidewall of the catheter shaft (2) to facilitate rapid exchange of the catheter over a guidewire (5). To prevent buckling or kinking of the catheter shaft (2) in the region of the guidewire opening (4) during retrieval of the embolic protection filer (50), the catheter comprises two elongate reinforcement elements (6, 3) extending along the catheter shaft (2). The first reinforcement element (6) comprises an elongate wire element extending from a proximal end located proximally of the guidewire opening (4) to a distal end located distally of the guidewire opening (4). The second reinforcement element (3) comprises an elongate tubular element extending from a proximal end located adjacent to and distally of the guidewire opening (4) to a distal end (9) located further distally of the guidewire opening (4). The tube (3) tapers distally radially outwardly adjacent to the distal end (9). This tapered part (9) of the tube (3) is fixedly attached to the interior surface of the catheter shaft (2).

A print control device has a group of filters including at least two functional filters which execute a modifying process for modifying print job, a filter configuration storage that stores configuration information of the functional filter group, a filter execution unit which retrieves functional filters based on the filter configuration information and causes the retrieved functional filters to execute a modifying process of the print job data. The functional filter group includes a specific functional filter for modifying the print job data by adding additional information. The specific functional filter includes a conversion formula acquiring unit which acquires a conversion formula for converting the additional information corresponding to the modifying process executed by the other functional filters, and an additional information arranging unit for determining an arrangement of the additional information with respect to the print job modified by the other filters based on the conversion formula.

A filter retrieval system for retrieving a previously implanted medical filter, and methods of using the retrieval system, are disclosed. The filter retrieval system has a flexible shaft, a retrieval element, and a handle with an actuator. The flexible shaft may be catheter-based, and has a proximal and a distal end, and has an opening near its distal end. The handle is affixed to the shaft near the proximal end of the shaft, and the actuator is adapted to manipulate the retrieval element. When an operator manipulates the actuator, the retrieval element is adapted to protrude slightly from the shaft opening. As the actuator is operated, the retrieval element can grasp or hook or otherwise engage a portion of the filter, and then pull the filter in through the opening into a passage or lumen of the catheter shaft. The retrieval system is capable of retrieving a filter in into a proximal and distal space defined by the flexible shaft, though only one space at a time.

A filter retrieval system is described. The filter retrieval system may include a capture structure having an interior space bounded by an at least partially closed distal end and an open proximal end. The filter retrieval system may include an elongate retrieval member slidably disposable within at least a portion of the interior space. The elongate retrieval member may include a retrieval structure adapted to releasably engage at least a portion of a filter. Methods of using the same are disclosed.

Funnel-trap type delivery and/or retrieval devices for temporary Inferior Vena Cava (IVC) filters or other medical implants or foreign bodies are described. These may employ a locking sheath or a proximal-aperture capture feature or features for IVC filter (or other device) retrieval.

The invention provides a Skyline double-filtering retrieval method based on multi-medical factors in a mobile O2O environment, which aims to solve the problem that a conventional mobile network result set is too large. The technical key point is that the Skyline double-filtering retrieval method comprises the following step: on the basis of medical stream data and checking requests, extracting dimension sub-spaces of related medical attributes from the checking requests in parallel in a whole space by a cloud terminal, wherein d is a whole space dimension number, k is a sub-space data dimension number, and the field (dimension) in which a user is interested is extracted from the whole space F, namely k; and sequencing k-dimension sub-spaces according to preference degrees of a client terminal to the medical attributes, thereby obtaining a sequenced dimensional-grid index. The Skyline double-filtering retrieval method has the beneficial effects that feedback data can be continuously interacted and screened in a data stream mode, the precision is high and the method is applicable to big-data environments, accurate information which meets requirements can be provided by an interaction platform provided by users and data sections, and thus the accuracy of final decisions of the users and rapid user decision experience can be improved.