Hoai T Nguyen

US Patent:

20220409258, Dec 29, 2022

Filed:

Jun 25, 2021

Appl. No.:

17/304829

Inventors:

- Mansfield MA, US
Murali Krishna Marisetti - Hyderabad, IN
Manjit Singh Bindra - Hyderabad, IN
Hoai Nguyen - Westminster CA, US

International Classification:

A61B 18/12

Abstract:

A current generator for a medical treatment system is disclosed herein. In one example, the medical treatment system can include a cable and a current generator. The cable can include a distal portion that couples to a medical device and a proximal portion. The proximal portion of the cable can include a first and second conductor, with each conductor having an exposed contact region. The current generator can releasably couple to the cable to deliver an electrical signal. The current generator can include an inner chamber that can receive at least a portion of the cable. The current generator can also include first and second electrical connectors, which can electrically connect to the conductors. The current generator can also include a cable guide that can assist with position the cable within the inner chamber and a cable lock that can lock a part of the cable in position.

US Patent:

20220387051, Dec 8, 2022

Filed:

Jun 2, 2021

Appl. No.:

17/303591

Inventors:

- Mansfield MA, US
Hoai Nguyen - Westminster CA, US

International Classification:

A61B 17/22
A61N 1/05
A61N 1/10

Abstract:

A medical treatment device is disclosed herein. In one example, the medical treatment device includes a core assembly which has a first conduct and a second conductor, the second conductor being formed from a first conductive material. An insulative material can surround the second conductor and define one or more uninsulated portions. A second conductive material can surround the first conductive material along at least a portion of the one or more uninsulated portions and can have a higher electrical conductivity than the first conductive material. The medical treatment device can include an interventional element formed from a third conductive material that electrical couples to the first conductor. A fourth conductive material can be disposed over the third conductive material and have a higher electrical conductivity than the third conductive material.

US Patent:

20220387098, Dec 8, 2022

Filed:

Jun 2, 2021

Appl. No.:

17/303590

Inventors:

- Mansfield MA, US
Hoai Nguyen - Westminster CA, US

International Classification:

A61B 18/14
A61B 18/12
A61B 18/00

Abstract:

Retrieval of material from vessel lumens can be improved by electrically enhancing attachment of the material to the removal device. The removal device can have a core assembly that includes a hypotube coupled to a first electrical terminal and a pushwire coupled to a second electrical terminal, the pushwire extending through the hypotube lumen. An insulating layer separates the hypotube and the pushwire, and an interventional element is coupled to a distal end of the pushwire. The interventional element can be disposed adjacent to a thrombus. An electrical signal is delivered to the interventional element to promote adhesion of the thrombus to the interventional element. The electrical signal can optionally be a periodic waveform, and the total energy delivered can be between 0.75-24,000 mJ and the peak current delivered via the electrical signal can be between 0.5-5 mA.

US Patent:

20220287765, Sep 15, 2022

Filed:

Mar 15, 2021

Appl. No.:

17/249808

Inventors:

- Mansfield MA, US
Gaurav Girdhar - Ladera Ranch CA, US
Hoai Nguyen - Westminster CA, US
Daniel Deen - Long Beach CA, US

International Classification:

A61B 18/14
A61B 18/16

Abstract:

A medical treatment device is disclosed herein. In one example, the medical treatment device includes a core assembly which has a first conduct and a second conductor. An insulative material can surround the second conductor and define an electrode portion of the second conductor that is uncovered by the insulative material. The medical treatment device can include an interventional element that electrical couples to the first conductor. The electrode portion of the second conductor can be disposed radially adjacent to or distal of the interventional element.

US Patent:

20220280172, Sep 8, 2022

Filed:

Mar 2, 2021

Appl. No.:

17/249438

Inventors:

- Mansfield MA, US
Hoai Nguyen - Westminster CA, US
Andyanhdzung Huynh - Westminster CA, US

International Classification:

A61B 17/221

Abstract:

Retrieval of material from vessel lumens can be improved by electrically enhancing attachment of the material to the thrombectomy system. The system can include a catheter having a distal portion configured to be positioned adjacent to a thrombus in a blood vessel, an electrode disposed at the distal portion of the catheter, and an interventional element configured to be delivered through a lumen of the catheter. The electrode and the interventional element are each configured to be electrically coupled to an extracorporeal power supply. The interventional element may be configured to evert over and around the clot material while current is delivered to the interventional element.

US Patent:

20220202431, Jun 30, 2022

Filed:

Dec 29, 2020

Appl. No.:

17/247897

Inventors:

- Mansfield MA, US
Hoai Nguyen - Westminster CA, US

International Classification:

A61B 17/22
A61F 2/95

Abstract:

Retrieval of material from vessel lumens can be improved by electrically enhancing attachment of the material to the thrombectomy system. The system can an interventional element configured to be delivered to a treatment site and to be electrically coupled to an extracorporeal power supply. The interventional element can be surface treated (e.g., via electrochemical anodization) to achieve a desired electrical conductivity gradient over the surface of the interventional element. The electrical conductivity gradient can result in a more desirable surface charge distribution upon delivery of electrical current to the interventional element.

US Patent:

20220192739, Jun 23, 2022

Filed:

Nov 4, 2021

Appl. No.:

17/453624

Inventors:

- Mansfield MA, US
Ashok Nageswaran - Irvine CA, US
Hoai Nguyen - Westminster CA, US

International Classification:

A61B 18/14
A61B 18/12

Abstract:

Retrieval of material from vessel lumens can be improved by electrically enhancing attachment of the material to the thrombectomy system. The system can include a manipulation member configured to be electrically coupled to an extracorporeal power supply and an interventional element configured to be mechanically and electrically coupled to the manipulation member via a joining element. A locking element can be positioned within the joining element to facilitate securing the interventional element to the joining element. In some embodiments, the system includes a control member configured to be coupled to a second terminal of the extracorporeal power supply and positioned within a lumen of the locking element.

US Patent:

20230064470, Mar 2, 2023

Filed:

Aug 30, 2021

Appl. No.:

17/446407

Inventors:

- Mansfield MA, US
Hoai Nguyen - Westminster CA, US

International Classification:

A61B 18/14
A61B 18/12

Abstract:

Devices, systems, and methods for removing obstructions from body lumens are disclosed herein. In some embodiments, a system for removing a thrombus includes an interventional element configured to be disposed proximate to or adjacent to a thrombus within a blood vessel. The system can include a signal generator in electrical communication with the interventional element. The signal generator can be configured to deliver an electrical signal to the interventional element. The electrical signal can include a waveform having a positive phase having a peak positive current and a first duration, and a negative phase having a peak negative current and a second duration. A magnitude of the peak positive current can be greater than a magnitude of the peak negative current, and the first duration can be greater than the second duration.