# US 12,465,397 B2 · Method and system for gas maintenance to a body cavity using a trocar

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- Number: US 12,465,397 B2
- Document ID: US12465397B2
- Status: Granted
- Kind: B2
- Application number: 18/414,088
- Filed: 2024-01-16
- Published: 2024-05-09
- Granted: 2025-11-11
- Earliest claimed: 2015-07-07
- Assignees: Lexion Medical, LLC
- Applicants: Lexion Medical, LLC
- Inventors: Carl M. Geisz
- Web page: https://patentgrep.com/patent/US12465397B2

## CPC

- A61B 17/3421: {Cannulas}
- A61B 17/3474: {Insufflating needles, e.g. Veress needles}
- A61B 17/3417: {Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating (syringe needles A61M5/32; dilators A61M29/00)}
- A61B 2218/008: for smoke evacuation
- A61M 13/003: {Blowing gases other than for carrying powders, e.g. for inflating, dilating or rinsing}
- A61M 13/006: {with gas recirculation}
- A61M 16/105: {Filters (A61M16/047, A61M16/22 take precedence; water traps A61M16/08)}
- A61M 2205/3344: Measuring or controlling pressure at the body treatment site
- 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)}

## Abstract

According to one embodiment, a trocar assembly having a proximal end and a distal end comprises an inner tubular member and an outer tubular member. The inner tubular member is formed with an opening at the proximal end and an opening at the distal end, the openings adapted to provide access for one or more surgical instruments during a surgical procedure. The outer tubular member is disposed about the inner tubular member, the outer tubular member being partitioned into at least a first chamber and a second chamber, wherein: the inner tubular member is separated from the outer tubular member by an inner wall; the first chamber is separated from the second chamber; and the first chamber and the second chamber are defined by the inner wall and an outer wall of the outer tubular member.

## Claims

### Claim 1

A method comprising:
positioning a distal portion of a trocar into a patient cavity, the trocar comprising an outer tubular member disposed about an inner tubular member, wherein:
the inner tubular member is formed with an opening at the distal portion and an opening at a proximal portion of the trocar, the openings being adapted to provide access to the patient cavity, wherein the inner tubular member further comprises a seal to deter the escape of gasses through the proximal portion of the trocar;
the inner tubular member is separated from the outer tubular member by an inner wall,
and wherein the trocar further comprises a first gas tubing connection fluidly connected to a lumen of the inner tubular member and
wherein the trocar further comprises a second gas tubing connection fluidly connected to a lumen of the outer tubular member;
supplying an insufflation gas to the patient cavity through the outer tubular member via the second gas tubing connection; and
removing smoke from the patient cavity through the inner tubular member via the first gas tubing connection, wherein a vacuum source is coupled to the first gas tubing connection.

### Claim 2 (depends on 1)

The method of claim 1, wherein the vacuum source further comprises a portable vacuum source.

### Claim 3 (depends on 2)

The method of claim 2, wherein the trocar further comprises a vacuum break fluidly connected to the first gas tubing connection.

### Claim 4 (depends on 1)

The method of claim 1, wherein the vacuum source further comprises a centralized hospital vacuum system.

### Claim 5 (depends on 4)

The method of claim 4, wherein the trocar further comprises a vacuum break fluidly connected to the first gas tubing connection.

### Claim 6 (depends on 5)

The method of claim 5, wherein the vacuum break comprises a flapper valve.

### Claim 7 (depends on 1)

The method of claim 1, wherein the trocar further comprises a vacuum break fluidly connected to the first gas tubing connection.

### Claim 8 (depends on 1)

The method of claim 1, wherein the vacuum break comprises a flapper valve.

### Claim 9 (depends on 1)

The method of claim 1, wherein the trocar further comprises a heater and a humidifier.