Pyloric anchor retrieval tools and methods

Inventors

Stangenes, Todd • Schwarz, Werner • Belhe, Kedar R. • Ziebol, Mathew • Anderson, Edward

Assignees

MetaModix Inc

Abstract

A retrieval device comprising a hook assembly and a capsule assembly. The hook assembly has an attachment feature at a first end. The capsule assembly includes a capsule, a capsule shaft, and a handle connected in series and defining an inner bore. The capsule has a first end defining an opening. The inner bore of the capsule assembly is configured to slidably receive the hook assembly. The handle has a central portion, a first extension portion attached to the capsule shaft, and a second extension portion with a hook assembly lock at a second end. The hook assembly lock is configured to lock the hook assembly to the second extension portion. The second extension portion is configured to pull the hook assembly relative to the capsule shaft, and the first extension portion is configured to push the capsule shaft relative to the hook assembly along the central longitudinal axis.

Core Innovation

The disclosure describes a retrieval device comprising a hook assembly having an attachment feature and a capsule assembly including a capsule, a capsule shaft, and a handle connected in series and defining an inner bore. The capsule having a first end defining an opening to the inner bore is configured to slidably receive the hook assembly. The handle includes a central portion, a first extension portion with a first end defining a first end of the handle, and a second extension portion with a second end defining a second end of the handle, with the handle transitioning between a retracted configuration and an extended configuration.

A first control knob and a second control knob are configured to transition the first extension portion and the second extension portion between the retracted configuration and the extended configuration. The distances between the first and second ends in the retracted configuration and the extended configuration differ, such that the first distance is less than the second distance. In the device, at least one control knob transition translates rotational motion to longitudinal motion along a longitudinal axis of the handle, shifting relative positions between the hook assembly and the capsule shaft and enabling positioning of the attachment feature relative to the capsule.

The hook assembly can include structures for cable control, including a sheath defining a lumen, a hook cable lock situated proximal a second end of the sheath configured to lock a second end of the cable and inhibit longitudinal motion of the cable relative to the sheath, and a hook cable stop configured to be inhibited from entering the sheath. The handle can also be configured to lock the hook assembly to the second end of the handle such that the hook assembly is inhibited from moving relative to the second end of the handle. The capsule assembly can include a first end with an opening and a removably configured tip, and the device supports retrieval of an object or medical device from within a body of a patient.

Claims Coverage

The partial claim set includes three independent claims, which collectively cover a retrieval device with a hook assembly slidably received in a capsule assembly and a handle having two control knobs to transition between retracted and extended configurations, a retrieval device emphasizing hook cable locking and stop features with a sheath and lumen, and a method of extracting a medical device using an attachment cable, capsule advancement, cable-to-handle locking, handle knob-driven motion translation, and removal of the coupled assemblies. Across the independent claims, the core coverage centers on the hook assembly/capsule assembly relationship and the handle knob transitions that convert rotational motion to longitudinal motion along a longitudinal axis.

Across the independent claims, the inventive coverage is directed to a retrieval device where a hook assembly is slidably received within a capsule assembly and where two control knobs transition a handle between retracted and extended configurations. The handle transitions are configured to translate rotational motion to longitudinal motion along the handle longitudinal axis and thereby position an attachment feature within a capsule. Additional independent-claim coverage adds a sheath/lumen with a hook cable lock and a hook cable stop to inhibit undesired cable movement and entry, and includes methods that use attachment-cable insertion, coupling, capsule advancement, cable locking to the handle, knob-driven handle transition, and removal of the coupled assemblies.

Stated Advantages

Documented Applications

No documented applications found