Alpana Kiran Gowdar

US Patent:

20230069245, Mar 2, 2023

Filed:

Aug 26, 2022

Appl. No.:

17/822689

Inventors:

- Irvine CA, US
Jeong Soo Lee - Diamond Bar CA, US
Nasser William Saleh - Stockton CA, US
Ilan Tamir - Irvine CA, US
Daniel J. Scherb - Newport Beach CA, US
Maxwell Harrison Fine - Costa Mesa CA, US
Alpana Kiran Gowdar - Irvine CA, US
Tri D. Tran - Fountain Valley CA, US
Neal H. Avery - Mission Viejo CA, US
Sarah Ghanbari - Tustin CA, US
Uy D. Trinh - Garden Grove CA, US
Erik Bulman - Lake Forest CA, US
Raymond Mercado - Temecula CA, US

International Classification:

A61F 2/24
A61M 25/00

Abstract:

Aspects of an expandable sheath can be used in conjunction with a catheter assembly to introduce a prosthetic device, such as a heart valve, into a patient. Such aspects can minimize trauma to the vessel by allowing for temporary expansion of a portion of the introducer sheath to accommodate the delivery apparatus, followed by a return to the original diameter once the prosthetic device passes through. Some aspects can include a sheath with a variable diameter inner liner wound in a spiral slidable configuration and an outer layer. The disclosed sheath is configured to expand from a predetermined rest diameter dto an expanded diameter dduring application of a radial outward force by passage of a medical device through the sheath.

US Patent:

20200353221, Nov 12, 2020

Filed:

Jul 23, 2020

Appl. No.:

16/936763

Inventors:

- Irvine CA, US
Erik Bulman - Lake Forest CA, US
Timothy A. Geiser - Laguna Niguel CA, US
Michael G. Valdez - Riverside CA, US
Yidong M. Zhu - Irvine CA, US
Baigui Bian - Laguna Niguel CA, US
Sonny Tran - Westminster CA, US
Richard D. White - Costa Mesa CA, US
Thanh Huy Le - Oceanside CA, US
Tung T. Le - Costa Mesa CA, US
Alpana Kiran Gowdar - Irvine CA, US

International Classification:

A61M 25/06
A61F 2/24
A61F 2/958

Abstract:

A delivery sheath includes an outer tubular layer and an initially folded inner tubular layer. When an implant passes therethrough, the outer tubular layer expands and the inner tubular layer unfolds into an expanded lumen diameter. The sheath may also include selectively placed longitudinal support rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion, thereby reducing the push force needed to advance the implant through the sheath's lumen.

US Patent:

20200261227, Aug 20, 2020

Filed:

May 4, 2020

Appl. No.:

16/865656

Inventors:

- Irvine CA, US
Tung T. Le - Costa Mesa CA, US
Alpana Kiran Gowdar - Irvine CA, US
Richard D. White - Costa Mesa CA, US
Sonny Tran - Westminster CA, US

International Classification:

A61F 2/24

Abstract:

Disclosed herein are expandable introducer sheaths and methods of making and using the same. The sheaths minimize trauma to a patient's vasculature by allowing for temporary expansion of a portion of the sheath to accommodate passage of a delivery system for an implant, then return to a non-expanded state after the passage of the device. The sheath includes a foldable inner member having a detached flap structure at its distal tip that facilitates expansion of the sheath lumen to increased diameters, and an elastomeric distal end that reduces push and retrieval forces therethrough. The sheath can include a hemostasis seal on its proximal end to prevent the leakage of blood out of the sheath and prevent ballooning of outer layer of the sheath.

US Patent:

20200108231, Apr 9, 2020

Filed:

Aug 26, 2019

Appl. No.:

16/550922

Inventors:

- Irvine CA, US
Erik Bulman - Lake Forest CA, US
Timothy A. Geiser - Laguna Niguel CA, US
Michael G. Valdez - Riverside CA, US
Yidong M. Zhu - Irvine CA, US
Baigui Bian - Irvine CA, US
Sonny Tran - Westminster CA, US
Richard D. White - Costa Mesa CA, US
Thanh Huy Le - Oceanside CA, US
Tung T. Le - Irvine CA, US
Alpana Kiran Gowdar - Irvine CA, US
Yong Gao - Irvine CA, US
David Delon Williams - Bountiful UT, US

International Classification:

A61M 25/06
A61F 2/24
A61F 2/958

Abstract:

A delivery sheath includes an outer tubular layer and an initially folded inner tubular layer. When an implant passes therethrough, the outer tubular layer expands and the inner tubular layer unfolds into an expanded lumen diameter. The sheath may also include selectively placed longitudinal support rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion, thereby reducing the push force needed to advance the implant through the sheath's lumen.

US Patent:

20190381284, Dec 19, 2019

Filed:

Aug 23, 2019

Appl. No.:

16/550060

Inventors:

- Irvine CA, US
Erik Bulman - Lake Forest CA, US
Timothy A. Geiser - Laguna Niguel CA, US
Michael G. Valdez - Riverside CA, US
Yidong M. Zhu - Irvine CA, US
Baigui Bian - Laguna Niguel, US
Sonny Tran - Westminster CA, US
Richard D. White - Costa Mesa CA, US
Thanh Huy Le - Oceanside CA, US
Tung T. Le - Irvine CA, US
Alpana Kiran Gowdar - Irvine CA, US
Yong Gao - Irvine CA, US
David Delon Williams - Bountiful UT, US

International Classification:

A61M 25/06
A61F 2/958
A61F 2/24

Abstract:

A delivery sheath includes an outer tubular layer and an initially folded inner tubular layer. When an implant passes therethrough, the outer tubular layer expands and the inner tubular layer unfolds into an expanded lumen diameter. The sheath may also include selectively placed longitudinal support rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion, thereby reducing the push force needed to advance the implant through the sheath's lumen.

US Patent:

20190029820, Jan 31, 2019

Filed:

Oct 2, 2018

Appl. No.:

16/149947

Inventors:

- Irvine CA, US
Yong GAO - Irvine CA, US
Erik BULMAN - Lake Forest CA, US
Baigui BIAN - Irvine CA, US
Yidong M. ZHU - Irvine CA, US
David D. WILLIAMS - Bountiful UT, US
Timothy A. GEISER - Laguna Niguel CA, US
Michael G. VALDEZ - Riverside CA, US
Sonny TRAN - Westminster CA, US
Richard D. WHITE - Poway CA, US
Thanh Huy LE - Oceanside CA, US
Tung T. LE - Irvine CA, US
Alpana K. GOWDAR - Newport Beach CA, US

International Classification:

A61F 2/24
A61M 25/06
A61M 25/00
A61M 25/01
A61F 2/97

Abstract:

An expandable introducer sheath for passage of implant delivery catheters, such as catheters for delivery of prosthetic heart valves. The expandable sheath balances the amounts, shapes and positions of various stiff and elastic structures in the sheath to selectively program the expandability and buckling stiffness of the sheath. The expandable sheath can include, for example, an expandable tubular layer that includes alternating stiff and elastic wall portions of a single radial thickness. The combination of stiff and elastic wall portions allow for torque and push strength to advance the expandable sheath while at the same time accommodating temporary expansion. The expandable sheath can also be reinforced with a tubular layer of braided fibers or a stent structure for additional strength. Other embodiments include selective use of slots or gaps at the distal end of a stiff wall portion to enhance expandability and distribute strain.

US Patent:

20190030295, Jan 31, 2019

Filed:

Oct 2, 2018

Appl. No.:

16/149636

Inventors:

- Irvine CA, US
Erik Bulman - Lake Forest CA, US
Timothy A. Geiser - Laguna Niguel CA, US
Michael G. Valdez - Riverside CA, US
Yidong M. Zhu - Irvine CA, US
Baigui Bian - Irvine CA, US
Sonny Tran - Westminster CA, US
Richard D. White - Poway CA, US
Thanh Huy Le - Oceanside CA, US
Tung T. Le - Irvine CA, US
Alpana K. Gowdar - Newport Beach CA, US
Yong Gao - Irvine CA, US
David D. Williams - Bountiful UT, US

International Classification:

A61M 25/06
A61F 2/958
A61F 2/24
A61M 25/00
A61F 2/01

Abstract:

A delivery sheath includes an outer tubular layer and an initially folded inner tubular layer. When an implant passes therethrough, the outer tubular layer expands and the inner tubular layer unfolds into an expanded lumen diameter. The sheath may also include selectively placed longitudinal support rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion, thereby reducing the push force needed to advance the implant through the sheath's lumen.

US Patent:

20190030296, Jan 31, 2019

Filed:

Oct 2, 2018

Appl. No.:

16/149650

Inventors:

- Irvine CA, US
Erik Bulman - Lake Forest CA, US
Timothy A. Geiser - Laguna Niguel CA, US
Michael G. Valdez - Riverside CA, US
Yidong M. Zhu - Irvine CA, US
Baigui Bian - Irvine CA, US
Sonny Tran - Westminster CA, US
Richard D. White - Poway CA, US
Thanh Huy Le - Oceanside CA, US
Tung T. Le - Irvine CA, US
Alpana K. Gowdar - Newport Beach CA, US
Yong Gao - Irvine CA, US
David D. Williams - Bountiful UT, US

International Classification:

A61M 25/06
A61F 2/958
A61F 2/24
A61M 25/00
A61F 2/01

Abstract:

A delivery sheath includes an outer tubular layer and an initially folded inner tubular layer. When an implant passes therethrough, the outer tubular layer expands and the inner tubular layer unfolds into an expanded lumen diameter. The sheath may also include selectively placed longitudinal support rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion, thereby reducing the push force needed to advance the implant through the sheath's lumen.