CN-122028950-A - Percutaneous blood pump with electric connection structure

Abstract

A percutaneous circulatory support device includes a percutaneous blood pump coupled to a distal region of an elongate shaft at a junction. The transdermal blood pump is configured to pump blood through a housing of the transdermal blood pump during use. The junction includes an end cap at a proximal end of the percutaneous blood pump that surrounds and is secured to a distal region of the elongate shaft at the junction. The joint may include a cladding filler material surrounding and extending proximally from a proximal region of the end cap and surrounding an outer surface of the elongate shaft. The proximal region of the end cap may include an annular sidewall having one or more apertures and/or one or more grooves extending into the annular sidewall, the cladding filler extending into the apertures and/or the grooves.

Inventors

• Darling Dale Bickman
• Marlene Landry
• Benjamin braddole
• Matthew Nelson Frost

Assignees

• 波士顿科学国际有限公司

Dates

Publication Date

20260512

Application Date

20241023

Priority Date

20231023

Claims (15)

1. 1. A percutaneous circulatory support device, comprising: a flexible elongate shaft; A percutaneous blood pump coupled to a distal end region of the elongate shaft at a junction, the percutaneous blood pump configured to pump blood through a housing of the percutaneous blood pump during use; wherein the junction includes an end cap at a proximal end of the percutaneous blood pump that surrounds and is secured to a distal region of the elongate shaft at the junction.
2. 2. The percutaneous circulatory support device of claim 1, wherein the end cap comprises an annular sidewall and one or more apertures extending into the annular sidewall.
3. 3. The percutaneous circulatory support device of claim 2, wherein the one or more apertures are through holes extending through an entire thickness of the sidewall, the through holes having the material of the end cap completely surround an outer periphery of the through holes.
4. 4. The percutaneous circulatory support device of claim 2, wherein the one or more apertures are blind holes extending through only a portion of the thickness of the sidewall.
5. 5. The percutaneous circulatory support device of claim 2, wherein the one or more apertures are slots extending through the entire thickness of the sidewall and open to the proximal end of the end cap.
6. 6. A percutaneous circulatory support device according to any preceding claim, wherein the percutaneous blood pump comprises a blood inlet, a blood outlet, an impeller assembly located between the blood inlet and the blood outlet, and a motor housing located at a proximal end of the impeller assembly, the motor housing comprising a motor to rotatably drive the impeller of the impeller assembly during use to pump blood from the blood inlet to the blood outlet.
7. 7. The percutaneous circulatory support device of claim 6, wherein the motor housing comprises a body surrounding the motor, and the end cap is a separate component secured to and extending proximally from the body.
8. 8. The percutaneous circulatory support device of claim 6, wherein the motor housing comprises a body surrounding the motor, and the end cap is integrally formed with the body.
9. 9. The percutaneous circulatory support device of any one of the preceding claims, wherein the end cap comprises a distal region having a first outer diameter and a proximal region having a second outer diameter, the second outer diameter being smaller than the first outer diameter.
10. 10. The percutaneous circulatory support device of claim 9, wherein a proximal region of the end cap comprises an annular sidewall and one or more apertures extending into the annular sidewall.
11. 11. The percutaneous circulatory support device of claim 9 or 10, wherein the engagement portion further comprises a wrap filler that surrounds the proximal region of the end cap, extends proximally from the proximal region of the end cap, and surrounds an outer surface of the elongate shaft.
12. 12. The percutaneous circulatory support device of claim 11, wherein the cladding filler extends into the one or more apertures.
13. 13. The percutaneous circulatory support device of claim 11 or 12, wherein the end cap comprises a shoulder between the proximal region of the end cap and the distal region of the end cap, wherein the cladding filler extends distally of the shoulder and surrounds a portion of the distal region of the end cap.
14. 14. The percutaneous circulatory support device of any one of claims 11 to 13, wherein an outer peripheral surface of the proximal region of the end cap comprises one or more grooves, wherein the cladding filler extends into the one or more grooves.
15. 15. A method of manufacturing a percutaneous circulatory support device, comprising: Inserting a distal end region of an elongate shaft of the percutaneous circulatory support device into a proximal end region of an end cap of a percutaneous blood pump of the percutaneous circulatory support device, and A cladding filler is applied over the proximal end region of the end cap and over a portion of the elongate shaft extending proximally from the end cap to form a junction between the end cap and the elongate shaft.

Description

Percutaneous blood pump with electric connection structure Cross Reference to Related Applications The present application claims the benefit of U.S. provisional patent application Ser. No. 63/592,262 filed on 10/23 of 2023, the disclosure of which is incorporated herein by reference. Technical Field The present disclosure relates to a catheter including a percutaneous blood pump. More particularly, the present disclosure relates to a percutaneous circulatory support device that includes a connection structure between an elongate shaft of a catheter and a percutaneous blood pump fastened thereto. Background Percutaneous mechanical circulatory support devices, such as blood pumps, are capable of providing temporary support for use for hours or months in patients with impaired cardiac function or cardiac output. The percutaneous mechanical circulatory support device may be flexible enough to be guided through the vasculature to the patient's heart. For example, such devices may be guided through the aortic arch and placed across the aortic valve. Various configurations of percutaneous mechanical circulatory support devices are known. There is a continuing need to provide improved configurations of percutaneous mechanical circulatory support devices. Disclosure of Invention The present disclosure provides designs, materials, methods of manufacture, and alternatives for use of medical devices including transdermal circulatory support devices and associated transdermal blood pumps. A first example is a percutaneous circulatory support device that includes a flexible elongate shaft and a percutaneous blood pump coupled to a distal region of the elongate shaft at a junction. The transdermal blood pump is configured to pump blood through a housing of the transdermal blood pump during use. The junction includes an end cap at a proximal end of the percutaneous blood pump that surrounds and is secured to a distal region of the elongate shaft at the junction. Alternatively or additionally to any of the examples above, in another example, the end cap includes an annular sidewall and one or more apertures extending into the annular sidewall. Alternatively or additionally to any of the examples above, in another example, the one or more apertures are through holes extending through an entire thickness of the sidewall, the through holes having material of the end cap completely surrounding an outer circumference of the through holes. Alternatively or additionally to any of the examples above, in another example, the one or more apertures are blind holes extending through only a portion of a thickness of the sidewall. Alternatively or additionally to any of the examples above, in another example, the one or more apertures are slots extending through an entire thickness of the sidewall and opening to a proximal end of the end cap. Alternatively or additionally to any of the examples above, in another example, the transdermal blood pump includes a blood inlet, a blood outlet, an impeller assembly between the blood inlet and the blood outlet, and a motor housing at a proximal end of the impeller, the motor housing including a motor to rotatably drive the impeller of the impeller assembly during use to pump blood from the blood inlet to the blood outlet. Alternatively or additionally to any of the examples above, in another example, the motor housing includes a body surrounding the motor, and the end cap is a separate component secured to and extending proximally from the body. Alternatively or additionally to any of the examples above, in another example, the motor housing includes a body surrounding the motor, and the end cap is integrally formed with the body. Alternatively or additionally to any of the examples above, in another example, the end cap includes a distal region having a first outer diameter and a proximal region having a second outer diameter, the second outer diameter being smaller than the first outer diameter. Alternatively or additionally to any of the examples above, in another example, the proximal end region of the end cap includes an annular sidewall and one or more apertures extending into the annular sidewall. Alternatively or additionally to any of the examples above, in another example, the joint further comprises a cladding filler material surrounding the proximal region of the end cap and extending proximally from the proximal region of the end cap and surrounding an outer surface of the elongate shaft. Alternatively or additionally to any of the examples above, in another example, the cladding filler extends into the one or more apertures. Alternatively or additionally to any of the examples above, in another example, the end cap includes a shoulder between the proximal end region of the end cap and the distal end region of the end cap, wherein the cladding filler extends distally of the shoulder and surrounds a portion of the distal end region of the end cap. Alternatively or additionally to any