# US 2019/0167334 A1 · Ceramic tip for gas-assisted electrosurgical probe

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- Number: US 2019/0167334 A1
- Document ID: US20190167334A1
- Status: Published application
- Kind: A1
- Application number: 15/833,780
- Filed: 2017-12-06
- Published: 2019-06-06
- Earliest claimed: 2017-12-06
- Assignees: US Patent Innovations, LLC
- Applicants: U.S. Patent Innovations, LLC
- Inventors: Jerome Canady; Feng Yan; Taisen Zhuang
- Web page: https://patentgrep.com/patent/US20190167334A1

## CPC

- A61B 18/042: {using additional gas becoming plasma}
- A61L 31/026: {Ceramic or ceramic-like structures, e.g. glasses}
- A61B 2018/00083: {low, i.e. electrically insulating}
- A61B 2018/1417: {Ball}
- A61B 2218/005: using gas or vapor, e.g. for protection or purging
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)

## Abstract

An apparatus for gas-assisted electrosurgery having a gas-assisted electrosurgical probe comprising a tube and an electrode within said tube, wherein a distal end portion of said electrode extends from an opening at a distal end of said tube and an electrically insulating tip connected to a distal end of said electrode. The electrically insulating tip has a substantially hemispherical distal end portion having a radius r1 and a proximal portion having a circular cross-section and a central axis of a length l1, wherein 11>r1.

## Claims

### Claim 1

A probe for gas-assisted electrosurgery comprising:
a gas-assisted electrosurgical probe comprising a tube and an electrode within said tube, wherein a distal end portion of said electrode extends from an opening at a distal end of said tube;
an electrically insulating tip connected to a distal end of said electrode, said electrically insulating tip comprising:
a substantially hemispherical distal end portion having a radius rc;
a proximal portion having a circular cross-section and a central axis of a length L1;
wherein L1>rc.

### Claim 2 (depends on 1)

The probe for gas-assisted electrosurgery according to claim 1, further comprising a fillet between said substantially distal end portion and said proximal portion.

### Claim 3 (depends on 2)

The probe for gas-assisted electrosurgery according to claim 2, wherein said proximal portion has an outer surface having a plurality of portions with at least two of said plurality of sections having a different radii of curvature.

### Claim 4 (depends on 3)

The probe for gas-assisted electrosurgery according to claim 3, wherein said at least two radii of curvature decrease from a proximal end of said electrically insulating tip to said fillet.

### Claim 5 (depends on 1)

The probe for gas-assisted electrosurgery according to claim 1, wherein said proximal portion has an outer surface having a varying radius of curvature.

### Claim 6 (depends on 1)

The probe for gas-assisted electrosurgery according to claim 1, wherein said proximal portion has a straight outer surface.

### Claim 7 (depends on 6)

The probe for gas-assisted electrosurgery according to claim 6, wherein said proximal portion has an outer surface having a varying radius of curvature.

### Claim 8 (depends on 1)

The probe for gas-assisted electrosurgery according to claim 1, wherein said proximal portion has a proximal end having a circular cross-section with a radius rp and 1.2rp<L1.

### Claim 9 (depends on 1)

The probe for gas-assisted electrosurgery according to claim 1, wherein said proximal portion has a proximal end having a circular cross-section with a radius rp and a distal end with a radius rd, wherein rd>2rp l . and

### Claim 10 (depends on 9)

The probe for gas-assisted electrosurgery according to claim 9, wherein said proximal portion has a proximal end having a circular cross-section with a radius rp and a distal end with a radius rd, wherein
0.9
<
r
d
-
r
p
L
1
<
0.5
.

### Claim 11 (depends on 1)

The probe for gas-assisted electrosurgery according to claim 1, wherein said proximal portion has a proximal end having a circular cross-section with a radius rp and a distal end with a radius rd, wherein
0.9
<
r
d
-
r
p
L
1
<
0.5
.

### Claim 12 (depends on 1)

The probe for gas-assisted electrosurgery according to claim 1, wherein said electrically insulated tip comprises a ceramic tip.