# US 2026/0076572 A1 · Medical interventional catheter

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- Number: US 2026/0076572 A1
- Document ID: US20260076572A1
- Status: Published application
- Kind: A1
- Application number: 19/108,257
- Filed: 2023-09-11
- Published: 2026-03-19
- Earliest claimed: 2022-09-15
- Assignees: Shanghai Microport Medical (Group) Co., Ltd.
- Applicants: Shanghai Microport Medical (Group) Co., Ltd.
- Inventors: Qi ZHOU; Zhenghai ZHANG; Bin YUE
- Web page: https://patentgrep.com/patent/US20260076572A1

## CPC

- A61B 5/0036: {including treatment, e.g., using an implantable medical device, ablating, ventilating}
- A61B 18/02: by cooling, e.g. cryogenic techniques
- A61B 5/0066: {Optical coherence imaging}
- A61B 5/0084: {for introduction into the body, e.g. by catheters (A61B5/1459 takes precedence)}
- A61B 5/02007: {Evaluating blood vessel condition, e.g. elasticity, compliance}
- A61B 5/6852: {Catheters}
- A61B 18/12: by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B 18/1492: {having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence)}
- A61M 25/0068: {Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure}
- A61M 25/0084: {being one or more injection needles}
- A61M 31/00: Devices for introducing or retaining media, e.g. remedies, in cavities of the body (A61M25/00 takes precedence {; introducing or retaining ophthalmic products into the ocular cavities A61F9/0008})
- A61M 37/0015: {by using microneedles}
- A61B 18/24: with a catheter (A61B18/26, A61B18/28 take precedence)
- A61B 2018/00023: {closed, i.e. without wound contact by the fluid}
- A61B 2018/00345: {Vascular system}
- A61B 2018/00577: {Ablation}
- A61B 2018/00791: {Temperature}
- A61B 2018/00821: {measured by a thermocouple}
- A61B 2018/00982: {combined with or comprising means for visual or photographic inspections inside the body, e.g. endoscopes}
- A61B 2018/0212: {using an instrument inserted into a body lumen, e.g. catheter}
- A61B 2018/1467: {using more than two electrodes on a single probe}
- A61M 2025/0085: {Multiple injection needles protruding axially, i.e. along the longitudinal axis of the catheter, from the distal tip}
- A61M 2037/0023: {Drug applicators using microneedles}
- A61N 7/022: {intracavitary}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}
- A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B)

## Abstract

The present invention relates to a medical interventional catheter, which includes a catheter body with both diagnostic and therapeutic capabilities. The catheter body includes a distal functional member configured for image-based monitoring of a tubular lumen of interest and for release of a therapeutic source to a target location in the tubular lumen of interest. The therapeutic source includes therapeutic energy and/or a therapeutic substance. This interventional catheter with both diagnostic and therapeutic capabilities provides real-time image-based monitoring in a therapeutic procedure, making the procedure more accurate and effective.

## Claims

### Claim 1

A medical interventional catheter, comprising a catheter body with both diagnostic and therapeutic capabilities, the catheter body comprising a functional member at a distal end thereof, the functional member configured for image-based monitoring of a tubular lumen of interest and for release of a therapeutic source to a target location in the tubular lumen of interest, the therapeutic source comprising therapeutic energy and/or a therapeutic substance.

### Claim 2 (depends on 1)

The medical interventional catheter according to claim 1, further comprising a tip, wherein a distal end of the functional member is connected to a proximal end of the tip by an elastic coupling portion, the distal end of the functional member is sealed by the elastic coupling portion, and the tip defines a guidewire lumen.

### Claim 3 (depends on 1)

The medical interventional catheter according to claim 1, wherein the functional member accomplishes the image-based monitoring of the tubular lumen of interest using one or more imaging approaches.

### Claim 4 (depends on 3)

The medical interventional catheter according to claim 3, wherein the functional member accomplishes the image-based monitoring of the tubular lumen of interest using optical coherence tomography imaging.

### Claim 5 (depends on 4)

The medical interventional catheter according to claim 4, wherein the functional member comprises an imaging probe and a transparent imaging window, the imaging probe disposed at the transparent imaging window.

### Claim 6 (depends on 1)

The medical interventional catheter according to claim 1, wherein the functional member is able to release one or more types of therapeutic energy.

### Claim 7 (depends on 6)

The medical interventional catheter according to claim 6, wherein the functional member is able to release at least one of radio frequency (RF) radiation, ultrasound waves, laser light and a cryofluid as the therapeutic energy.

### Claim 8 (depends on 1)

The medical interventional catheter according to claim 1, wherein the functional member accomplishes the release of the therapeutic substance to the target location in the tubular lumen of interest using one or more approaches.

### Claim 9 (depends on 8)

The medical interventional catheter according to claim 8, wherein the therapeutic substance is a drug, wherein the functional member accomplishes the release of the therapeutic substance to the target location in the tubular lumen of interest using at least one of a drug-containing coating, a drug-delivery reservoir and drug-delivery microneedles.

### Claim 10 (depends on 9)

The medical interventional catheter according to claim 9, wherein the functional member employs a drug-delivery reservoir and/or drug-delivery microneedles, wherein the catheter body further comprises a tubular body having an outer surface, on which the drug-delivery reservoir and/or the drug-delivery microneedles is/are provided, the catheter body defining therein a drug-delivery channel extending along an axis of the tubular body of the functional member to a proximal end of the tubular body and a distal end of the drug-delivery channel connected to the drug-delivery reservoir and/or the drug-delivery microneedles.

### Claim 11 (depends on 1)

The medical interventional catheter according to claim 1, wherein the functional member comprises an imaging probe, an electrode and a temperature-measuring element, the imaging probe configured to accomplish the image-based monitoring, the electrode configured to release RF radiation, the temperature-measuring element disposed on the electrode and configured to monitor a surface temperature of the electrode.

### Claim 12 (depends on 11)

The medical interventional catheter according to claim 11, wherein the catheter body further comprises a tubular body, wherein the imaging probe is provided in the tubular body, and the electrode is disposed on an outer surface of the tubular body,
the tubular body defines an imaging channel, an electrode lead channel and a temperature-control lead channel therein, which are independent of one another and each extend along an axis of the tubular body of the functional member to a proximal end of the tubular body, the imaging channel arranged at a center of the tubular body, the electrode lead channel and the
the imaging channel provided therein with an imaging transmission structure connected to the imaging probe, the electrode lead channel provided therein with an electrode lead connected to the electrode, the temperature-control lead channel provided therein with a temperature-control lead connected to the temperature-measuring element.

### Claim 13 (depends on 12)

The medical interventional catheter according to claim 12, wherein the tubular body further defines a temperature-control fluid channel therein, which is independent of the imaging channel, the electrode lead channel and the temperature-control lead channel and arranged beside the imaging channel, wherein the electrode defines temperature-control fluid output holes, and the temperature-control fluid channel extends from the proximal end of the tubular body along the axis thereof and is connected to the temperature-control fluid output holes, and the temperature-control fluid channel configured for transfer of a temperature-control fluid and for release of the temperature-control fluid to the target location through the temperature-control fluid output holes.

### Claim 14 (depends on 13)

The medical interventional catheter according to claim 13, wherein the tubular body is a braided single-lumen tube, the braided single-lumen tube housing therein a temperature-control fluid tube, an imaging tube, an electrode lead tube and a temperature-control lead tube, the temperature-control fluid tube defining a lumen providing the temperature-control fluid channel, the imaging tube defining a lumen providing the imaging channel, the electrode lead tube defining a lumen providing the electrode lead channel, the temperature-control lead tube defining a lumen providing the temperature-control lead channel, each of the temperature-control fluid tube, the imaging tube, the electrode lead tube and the temperature-control lead tube having a wall thickness less than 0.2 mm.

### Claim 15 (depends on 14)

The medical interventional catheter according to claim 14, wherein the temperature-control fluid tube, the imaging tube, the electrode lead tube and the temperature-control lead tube are securely bonded together.

### Claim 16 (depends on 13)

The medical interventional catheter according to claim 13, wherein the tubular body has an outer diameter of 1.0 mm to 3.0 mm, the imaging channel has a diameter not exceeding 1.0 mm, the temperature-control fluid channel has a diameter not exceeding 0.5 mm, the electrode lead channel has a diameter of 0.1 mm to 0.5 mm, and the temperature-control lead channel has a diameter of 0.1 mm to 0.5 mm, and/or
wherein the temperature-control fluid output holes are micro-holes, the micro-holes having a diameter of 50 μm to 200 μm.

### Claim 17

(canceled)

### Claim 18 (depends on 11)

The medical interventional catheter according to claim 11, wherein a plurality of electrodes are provided, the plurality of electrodes are spaced axially and/or circumferentially with respect to the catheter body, at least two of the plurality of electrodes are annular and spaced axially with respect to the catheter body, wherein the imaging probe is provided between adjacent two of the annular electrodes.

### Claim 19 (depends on 13)

The medical interventional catheter according to claim 13, further comprising an interface portion, wherein a proximal end of the catheter body is connected to the interface portion, and the interface portion comprises:
an imaging interface connected to a proximal end of the imaging transmission structure;
a fluidic interface connected to a proximal end of the temperature-control fluid channel; and
an electrical interface connected to proximal ends of the electrode lead and the temperature-control lead.

### Claim 20 (depends on 1)

The medical interventional catheter according to claim 1, wherein the functional member comprises an imaging probe configured to accomplish the image-based monitoring, wherein the catheter body further comprises a tubular body, the imaging probe is disposed in the tubular body, the tubular body defining therein an imaging channel, the imaging channel extending along an axis of the tubular body of the functional member to a proximal end of the tubular body, the imaging channel provided therein with an imaging transmission structure connected to the imaging probe, the imaging transmission structure configured to be driven by a driving member to rotate the imaging probe circumferentially and/or translate the imaging probe axially with respect to the catheter body.

### Claim 21 (depends on 20)

The medical interventional catheter according to claim 20, wherein the imaging transmission structure comprises an imaging optical fiber, a protective tube and a torsion spring, the protective tube disposed over the imaging optical fiber, the torsion spring disposed between the protective tube and the imaging optical fiber, one end of the imaging optical fiber being connected to the imaging probe and the other end thereof being connected to the driving member.