Devices, systems, and methods for extracting a ureteral stent
AssigneeBoston Scientific Scimed, Inc.
InventorMichael S H Chu
Life of this patent
Estimating the term…
Abstract
The present disclosure relates generally to devices, systems, and methods for extracting ureteral stent from a patient. Some embodiments are particularly directed to an extraction tool capable of extending into a urethra and retrieving a stent without scope visualization, assistance from a medical professional, and/or prescription medication (e.g., for pain). The extraction tool may be a single-use tool having an end effector configured to capture a proximal portion of a stent. In several embodiments, the extraction tool be utilized in conjunction with a stent assembly having a band coupled to a proximal retention member of the stent.
Claims20
A medical device, comprising:
- an interface coupled to a proximal portion of an interface shaft, wherein a distal portion of the interface shaft comprises a pin;
- an end effector coupled to a distal portion of an inner shaft, the end effector is configured to engage a deployed stent for extraction;
- and
- a handle body coupled to the distal portion of the interface shaft and a proximal portion of the inner shaft,
- wherein the handle body includes a slot configured to receive the pin of the interface shaft and guide motion of the interface and the end effector with respect to the handle body, and
- wherein the end effector, the inner shaft, and the interface shaft define a lumen configured for passage of a guidewire.
A method comprising:
- inserting a proximal end of an extractor into a urethra of a body, the extractor comprising:
- an interface coupled to a proximal portion of an interface shaft,
- an end effector coupled to a distal portion of an inner shaft, and
- a handle body coupled to a distal portion of the interface shaft and a proximal portion of the inner shaft;
- transitioning the extractor from a retracted state to an extended state to capture a stent fully deployed in the urethra;
- and
- removing the proximal end of the extractor from the urethra to remove the stent from the body,
- wherein the distal portion of the interface shaft comprises a pin, and wherein the handle body includes a slot configured to receive the pin of the interface shaft and guide motion of the interface and the end effector with respect to the handle body when the extractor is transitioned from the retracted state to the extended state, and
- wherein the slot comprises a helical shape or an oval shape to at least partially rotate the end effector when the extractor is transitioned from the retracted state to the extended state.
A system comprising:
- an extractor comprising:
- an interface coupled to a proximal portion of an interface shaft, wherein a distal portion of the interface shaft comprises a pin,
- an end effector coupled to a distal portion of an inner shaft, and
- a handle body coupled to the distal portion of the interface shaft and a proximal portion of the inner shaft, wherein the handle body includes a slot configured to receive the pin of the interface shaft and guide motion of the interface and the end effector with respect to the handle body;
- and
- a ureteral stent configured to be deployed in a urethra, the ureteral stent including a loop configured for capture by the end effector of the extractor.
Dependencies are inferred from the claim text.