# US 11,439,742 B2 · Localization needle

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- Number: US 11,439,742 B2
- Document ID: US11439742B2
- Status: Granted
- Kind: B2
- Application number: 15/892,218
- Filed: 2018-02-08
- Published: 2018-08-09
- Granted: 2022-09-13
- Earliest claimed: 2017-02-08
- Assignees: Veran Medical Technologies, Inc.
- Applicants: Veran Medical Technologies, Inc.
- Inventors: Galen Ohnmacht; Christopher Lee; John Meyer
- Web page: https://patentgrep.com/patent/US11439742B2

## CPC

- A61M 5/007: {for contrast media}
- A61B 6/481: {involving the use of contrast agents}
- A61B 8/0841: {for locating instruments}
- A61B 8/12: in body cavities or body tracts, e.g. by using catheters
- A61B 10/0283: {with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe (A61B10/025, A61B10/0266 take precedence)}
- A61B 34/20: Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
- A61B 90/39: {Markers, e.g. radio-opaque or breast lesions markers}
- A61B 1/2676: {Bronchoscopes}
- A61B 34/25: {User interfaces for surgical systems}
- A61B 2034/107: {Visualisation of planned trajectories or target regions}
- A61B 2034/2051: {Electromagnetic tracking systems}
- A61B 2090/3908: {Soft tissue, e.g. breast tissue}
- A61B 2090/3925: {ultrasonic}
- A61B 2090/3933: {Liquid markers}
- A61B 2090/395: {with marking agent for marking skin or other tissue}
- A61B 2090/3954: {magnetic, e.g. NMR or MRI}
- A61B 2090/3966: {Radiopaque markers visible in an X-ray image}
- A61B 2090/397: {electromagnetic other than visible, e.g. microwave}
- A61M 2005/1588: {having means for monitoring, controlling or visual inspection, e.g. for patency check or for avoiding extravasation}
- A61M 2205/3317: Electromagnetic, inductive or dielectric measuring means
- 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)}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A marking assembly includes a hollow cannula having a wall extending from a proximal end to a distal end. The wall defines a lumen of the cannula. The wall includes at least one opening at a distal portion of the cannula. A stylet is configured to be received in the lumen of the cannula. The stylet has a wall extending from a proximal end to a distal end. When the stylet is received in the lumen of the cannula, a circumferential space is defined between the wall of the stylet and the wall of the cannula such that fluid entering the circumferential space will exit the cannula through the at least one opening of the cannula.

## Claims

### Claim 1

A marking assembly for marking targeted tissue, the marking assembly comprising:
a cannula having a wall extending from an open proximal end to a closed distal end, the wall defining a lumen of the cannula, the wall having a distal portion defining a plurality of openings;
a stylet configured to be received in the lumen of the cannula, the stylet having a wall extending from an open proximal end to a closed distal end, the stylet having a localization element configured for tracking by a navigation system, wherein when the stylet is received in the lumen of the cannula the closed distal end of the stylet is positioned proximally of the closed distal end of the cannula and a circumferential space is defined between the wall of the stylet and the wall of the cannula and wherein when the stylet is received in the lumen of the cannula the localization element is positioned within the lumen of the cannula distally from at least some of the plurality of openings in the distal portion of the wall of the cannula; and
a port in fluid communication with the circumferential space, wherein fluid including a dye injected into the port flows through the circumferential space and exits the cannula through the plurality of openings into the targeted tissue.

### Claim 2 (depends on 1)

The marking assembly of claim 1, wherein the localization element configured for tracking by a navigation system to determine at least one of a real-time position and a projected path of the stylet.

### Claim 3 (depends on 2)

The marking assembly of claim 2, wherein the localization element comprises an electromagnetic sensor at the distal end of the stylet.

### Claim 4

A localization needle, comprising:
a cannula having a wall extending from an open proximal end to a closed distal end, the wall defining a lumen of the cannula, the wall having a distal portion defining at least one opening;
a first hub affixed to the open proximal end of the cannula;
a stylet having a proximal end and a distal end, the stylet configured to be received in the lumen of the cannula, the stylet having a localization element configured for tracking by a navigation system, wherein when the stylet is received in the lumen of the cannula, a circumferential space is defined between the stylet and the wall of the cannula;
a second hub affixed to the proximal end of the stylet, the second hub configured to engage the first hub to maintain a relative position of the localization element, of the stylet, with respect to the at least one opening of the cannula; and
a port in fluid communication with the circumferential space, wherein fluid including a dye injected into the port flows through the circumferential space and exits the cannula through the at least one opening into the targeted tissue.

### Claim 5 (depends on 4)

The localization needle of claim 4, wherein the relative position of the localization element is distal from the at least one opening.