# US 2019/0167531 A1 · Feeding tube with electromagnetic sensor

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- Number: US 2019/0167531 A1
- Document ID: US20190167531A1
- Status: Published application
- Kind: A1
- Application number: 16/208,040
- Filed: 2018-12-03
- Published: 2019-06-06
- Earliest claimed: 2017-12-03
- Assignees: Envizion Medical Ltd.
- Applicants: Envizion Medical Ltd.
- Inventors: Doron Besser; Guy Ben Ezra; Anat Hofshi
- Web page: https://patentgrep.com/patent/US20190167531A1

## CPC

- A61J 15/0088: {for sensing parameters related to the device}
- A61J 15/0003: {Nasal or oral feeding-tubes, e.g. tube entering body through nose or mouth}
- A61J 15/0015: {Gastrostomy feeding-tubes (insertion tools or methods A61B17/34)}
- A61J 15/0073: {Multi-lumen tubes}
- A61J 15/0092: {Valves on feeding tubes (tube valves A61M39/22)}
- A61J 15/0011: {Feeding-tubes for delivery of nourishment to the mouth; Mouth pieces therefor (breast-nipple shields A61J13/00; mouth pieces for drinking straws A47G21/185; straws to take medicine A61J7/0038, mouthpieces for tracheal tubes A61M16/0488)}
- A61J 15/0069: {Tubes feeding directly to the intestines, e.g. to the jejunum}
- A61J: CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE

## Abstract

There is provided feeding tubes including an electromagnetic sensor including a sensor body comprising a core positioned at a distal end of the sensor lumen, and a wire extending along the length of the feeding tube, wherein an RF induced heating of the feeding tube in an MRI environment is below 5 degrees.

## Claims

### Claim 1

A feeding tube comprising:
a feeding lumen for supplying substances or pressure to a subject's stomach and/or duodenum, through the esophagus; and
a sensor lumen, said sensor lumen comprising an electromagnetic sensor comprising:
a sensor body comprising a core positioned at a distal end of said sensor lumen, and
a wire extending along the length of the sensor lumen,
wherein an RF induced heating of said feeding tube in an MRI environment is below 5 degrees.

### Claim 2 (depends on 1)

The feeding tube of claim 1, wherein said electromagnetic sensor body further comprises a printed circuit board (PCB).

### Claim 3 (depends on 2)

The feeding tube of claim 2, wherein said sensor core and said wire are directly or indirectly attached to said PCB.

### Claim 4 (depends on 2)

The feeding tube of claim 2, wherein said PCB is a FR-4 PCB.

### Claim 5 (depends on 1)

The feeding tube of claim 1, wherein said wire is twisted.

### Claim 6 (depends on 5)

The feeding tube of claim 5, wherein said twisted wire comprises two intercalated wires.

### Claim 7 (depends on 1)

The feeding tube of claim 1, wherein the RF induced heating of said feeding tube in an MM environment is below 3 degrees.

### Claim 8 (depends on 1)

The feeding tube of claim 1, wherein the RF induced heating of said feeding tube in an MM environment is below 2 degrees.

### Claim 9 (depends on 1)

The feeding tube of claim 1, wherein the RF induced heating of said feeding tube in an MM environment is below 1.5 degrees.

### Claim 10 (depends on 1)

The feeding tube of claim 1 having a butt force (N) in the range of 0.2-0.5 N.

### Claim 11 (depends on 1)

The feeding tube of claim 1, being at least 900 mm long.

### Claim 12 (depends on 1)

The feeding tube of claim 1, having a length of 900-1400 mm.

### Claim 13 (depends on 1)

The feeding tube of claim 1, further comprising a radiopaque marker.

### Claim 14 (depends on 1)

The feeding tube of claim 1, wherein the twisted wire has an outer diameter of 0.5 mm or less.

### Claim 15 (depends on 1)

The feeding tube of claim 1, wherein the twisted wire has an outer diameter of 0.4 mm or less.

### Claim 16 (depends on 1)

The feeding tube of claim 1, wherein the sensor body has an outer diameter of 1 mm or less.

### Claim 17 (depends on 1)

The feeding tube of claim 1, further comprising at least four vacuum lumens peripherally surrounding said feeding lumen and said sensor lumen.

### Claim 18 (depends on 17)

The feeding tube of claim 17, wherein each of said at least four vacuum lumen comprises a vacuum sealing portion, said vacuum sealing portion comprises one or more suction ports configured to circumferentially and sealingly draw an inner wall of the esophagus thereagainst.

### Claim 19 (depends on 18)

The feeding tube of claim 18, further comprising a valve connected to said at least four vacuum lumens, said valve configured to shift an applied vacuum between different ones of said at least four vacuum lumens, thereby varying how said inner wall of the esophagus is circumferentially and sealingly drawn.