CN-122005056-A - Medical devices and related methods

Abstract

A medical device includes an electrode shaft and an insulating tip. The electrode shaft is configured to deliver energy to a target site and includes an electrode lumen configured to deliver fluid to the target site. The insulating tip is coupled to a distal tip of the electrode shaft. The insulated tip includes an insulated tip lumen fluidly connected to the electrode shaft lumen and configured to deliver fluid to the target site. The insulating tip covers the entirety of the distal tip of the electrode shaft.

Inventors

• XIA YIN
• CAI LONGSHENG
• PEI XINZHE
• HUA MINFENG

Assignees

• 波士顿科学国际有限公司

Dates

Publication Date

20260512

Application Date

20191217

Claims (20)

1. 1. A medical device, comprising: a device shaft, the device shaft comprising a distal end; An electrode shaft configured to deliver energy to a treatment site, wherein the electrode shaft is coupled to the device shaft and is longitudinally movable relative to the device shaft, and An insulating tip coupled to a distal tip of the electrode shaft, Wherein the insulating tip comprises two insulating tip halves coupled together to couple the insulating tip to the electrode shaft, an Wherein the electrode shaft comprises a widened distal portion, and wherein each of the two insulating tip halves comprises a recess for receiving at least a portion of the widened distal portion when the two insulating tip halves are coupled to the electrode shaft.
2. 2. The medical device of claim 1, wherein the device shaft comprises a device shaft lumen, wherein the electrode shaft comprises an electrode shaft lumen in fluid communication with the device shaft lumen, wherein the insulating tip comprises an insulating tip lumen in fluid communication with the electrode shaft lumen, and wherein the electrode shaft lumen and the insulating tip lumen extend along a longitudinal axis of the medical device.
3. 3. The medical device of claim 2, wherein the insulated tip lumen includes a wide portion configured to receive a portion of a distal tip of the electrode shaft and a narrow portion extending distally beyond the distal tip of the electrode shaft, wherein the groove in each of the two insulated tip halves is located between the wide portion configured to receive the portion of the distal tip of the electrode shaft of the insulated tip lumen and the narrow portion of the insulated tip lumen extending distally beyond the distal tip of the electrode shaft.
4. 4. A medical device, comprising: a device shaft, the device shaft comprising a distal end; An electrode shaft configured to deliver energy to a treatment site, wherein the electrode shaft is coupled to the device shaft and is longitudinally movable relative to the device shaft, and An end cap at the distal end of the device shaft, Wherein the end cap comprises a central opening through which the electrode shaft is movable, and wherein the end cap comprises a stop surface, Wherein the electrode shaft comprises a first longitudinal portion, a second longitudinal portion proximal to the first longitudinal portion, and a transition portion between the first and second longitudinal portions, and wherein the transition portion is configured to engage the stop surface of the end cap to limit the electrode shaft from extending distally, and Wherein the first longitudinal portion comprises a cross-sectional width that is less than a cross-sectional width of the second longitudinal portion.
5. 5. The medical device of claim 4, wherein the device shaft comprises a device shaft lumen, wherein the electrode shaft comprises an electrode shaft lumen configured to deliver fluid to the treatment site, and wherein the electrode shaft lumen is in fluid communication with the device shaft lumen.
6. 6. The medical device of claim 5, further comprising an insulating tip coupled to the distal tip of the electrode shaft.
7. 7. The medical device of claim 6, wherein the insulating tip covers all of the distal tip of the electrode shaft.
8. 8. The medical device of claim 7, wherein the insulated tip comprises an insulated tip lumen in fluid communication with the electrode shaft lumen and configured to deliver fluid to the treatment site, and wherein the electrode shaft lumen and the insulated tip lumen extend along a longitudinal axis of the medical device.
9. 9. The medical device of claim 8, wherein the insulating tip lumen includes a wide portion configured to receive a portion of a distal tip of the electrode shaft and a narrow portion extending distally beyond the distal tip of the electrode shaft.
10. 10. The medical device of claim 9, wherein the narrow portion of the insulating tip lumen comprises a cross-sectional width that is the same as a cross-sectional width of the electrode shaft lumen, and wherein the narrow portion comprises a distal end with a chamfer.
11. 11. The medical device of claim 10, wherein the insulated tip comprises two insulated tip halves coupled together to couple the insulated tip to the electrode shaft.
12. 12. The medical device of claim 11, wherein the electrode shaft includes a widened distal portion, and wherein each of the two insulating tip halves includes a recess to receive at least a portion of the widened distal portion when the two insulating tip halves are coupled to the electrode shaft, and Wherein the groove in each of the two insulating tip halves is located between the wide portion of the insulating tip lumen configured to receive the distal tip of the electrode shaft and the narrow portion of the insulating tip lumen extending distally beyond the distal tip of the electrode shaft.
13. 13. The medical device of claim 6, wherein the insulating tip longitudinally overlaps a portion of the electrode shaft, wherein the insulating tip is coupled to the electrode shaft by soldering, and wherein a radially inner portion of the insulating tip comprises a gap configured to receive at least a portion of the soldering.
14. 14. The medical device of claim 6, wherein the insulated tip longitudinally overlaps a portion of the electrode shaft, and wherein the insulated tip is coupled to the electrode shaft by brazing.
15. 15. The medical device of claim 14, further comprising a filler material, wherein when the insulating tip is coupled to the electrode shaft, the filler material occupies a space at a junction between a portion of the electrode shaft and a portion of the insulating tip.
16. 16. The medical device of claim 6, wherein the insulating tip comprises a rounded distal end and a cylindrical side.
17. 17. A medical device, comprising: an electrode shaft configured to deliver energy to a treatment site, and An insulating tip coupled to a distal tip of the electrode shaft, Wherein the insulating tip covers the entirety of the distal tip of the electrode shaft, Wherein the insulating tip comprises a rounded distal end and a cylindrical side portion, and Wherein the rounded distal end extends distally beyond the distal tip of the electrode shaft.
18. 18. The medical device of claim 17, further comprising: A device shaft, wherein the device shaft comprises a distal end, and wherein the electrode shaft is coupled to the device shaft and is longitudinally movable relative to the device shaft.
19. 19. The medical device of claim 18, wherein the device shaft comprises a device shaft lumen, wherein the electrode shaft comprises an electrode shaft lumen in fluid communication with the device shaft, and wherein the insulating tip comprises an insulating tip lumen in fluid communication with the electrode shaft lumen, and wherein the electrode shaft lumen and the insulating tip lumen extend along a longitudinal axis of the medical device.
20. 20. The medical device of claim 19, wherein the insulated tip lumen includes a wide portion configured to receive a portion of the distal tip of the electrode shaft and a narrow portion extending distally beyond the distal tip of the electrode shaft, Wherein the narrow portion of the insulating tip lumen comprises a cross-sectional width that is the same as the cross-sectional width of the electrode shaft lumen, Wherein the narrow portion includes a distal end with a chamfer, and Wherein the insulating tip longitudinally overlaps a portion of the electrode shaft.

Description

Medical devices and related methods The present application is a divisional application of patent 201911302755.6. Technical Field Aspects of the present invention generally relate to medical devices and related methods. In particular, aspects of the present invention relate to medical devices and related methods configured for treating tissue by delivering electrical energy to or into the tissue and/or injecting fluid into and/or beneath the tissue with an electrode having an insulated distal tip. Background Medical devices, such as endoscopes or other suitable insertion devices, are used for various types of diagnosis and surgery, such as endoscopy, laparoscopy, arthroscopy, gynecological, thoracoscopy, cystoscopy, and the like. Many of these procedures involve the delivery of energy to tissue of an organ or gland to treat tumors, infections, and the like. Examples of such procedures include Endoscopic Mucosal Resection (EMR), endoscopic Submucosectomy (ESR), endoscopic submucosal dissection, polypectomy, mucosal resection, and the like. In particular, such surgery may be performed by inserting an insertion device into a subject's body through a surgical incision or through a natural anatomic orifice (e.g., mouth, vagina, or rectum), and performing the surgery or operation at the target site with an auxiliary device inserted through the insertion device. Sometimes, during a medical procedure, a user may use the injection needle and the energy delivery device to raise, separate, irrigate, cut, dissect, ablate, mark, coagulate, cauterize, or otherwise treat and/or manipulate tissue. The injection and the energy delivery may be performed separately. For example, to deliver energy to tissue, a user may be required to remove an injection needle from an insertion device and deliver the energy delivery device to the target tissue through the insertion device, and vice versa. During surgery, the user may alternate between using the injection needle and the energy delivery device, and exchanging the devices may increase the duration and risk of the medical procedure. Additionally, one or more portions of the energy delivery device may inadvertently contact or damage tissue (or the internal passageway of the insertion device) when energized. The apparatus and method of the present invention may correct one or more of the above-described deficiencies or address other aspects of the art. Disclosure of Invention Examples of the invention relate, among other things, to medical devices configured to treat tissue by delivering electrical energy to the tissue and configured to deliver fluid into and/or beneath the tissue. Each of the examples disclosed herein may include one or more of the features described in connection with any of the other disclosed examples. In one example, a medical device may include an electrode shaft and an insulating tip. The electrode shaft may be configured to deliver energy to a target site and may include an electrode shaft lumen configured to deliver fluid to the target site. The insulating tip may be coupled to the distal tip of the electrode shaft. The insulating tip may include an insulating tip lumen fluidly connected to the electrode shaft lumen and may be configured to deliver fluid to a target site. The insulating tip may cover the entirety of the distal tip of the electrode shaft. The medical device may include one or more of the following features. The insulating tip may include a rounded distal end and a cylindrical side portion. The rounded distal end may be hemispherical and may extend distally beyond the distal tip of the electrode shaft. The insulating tip lumen may include a wide portion configured to receive a portion of the distal tip of the electrode shaft, and a narrow portion extending distally beyond the distal tip of the electrode shaft. The narrow portion of the insulating tip lumen may include a cross-sectional width equal to a cross-sectional width of the electrode lumen, and the narrow portion may include a chamfered distal portion. The electrode shaft lumen and the insulating tip lumen may extend along a longitudinal axis of the medical device. The insulating tip may be coupled to the electrode shaft via solder. The radially inner portion of the insulating tip may include a gap configured to receive at least a portion of the solder. The insulating tip may be coupled to the electrode shaft via brazing. When the insulating tip is coupled to the electrode shaft, the filler material may occupy space at the junction between a portion of the electrode shaft and a portion of the insulating tip. The insulating tip may include two insulating tip halves that are coupled together to couple the insulating tip to the electrode shaft. The electrode shaft may include a widened distal portion. Each of the two insulating tip halves may include a recess for receiving at least a portion of the widened distal portion when the insulating tip half is coupled to the electrode shaft. The