# US 2014/0194685 A1 · Trocar System

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- Number: US 2014/0194685 A1
- Document ID: US20140194685A1
- Status: Published application
- Kind: A1
- Application number: 14/129,886
- Filed: 2012-06-12
- Published: 2014-07-10
- Earliest claimed: 2011-06-30
- Inventors: Siegfried Riek; Karl-Heinz Bachmann; Thomas Gaiselmann
- Web page: https://patentgrep.com/patent/US20140194685A1

## CPC

- A61B 17/3421: {Cannulas}
- A61B 1/00154: {using guiding arrangements for insertion}
- A61B 1/04: combined with photographic or television appliances
- A61B 1/05: characterised by the image sensor, e.g. camera, being in the distal end portion
- A61B 1/07: using light-conductive means, e.g. optical fibres
- A61B 17/29: Forceps for use in minimally invasive surgery
- A61B 17/32002: {with continuously rotating, oscillating or reciprocating cutting instruments}
- A61B 17/3201: Scissors (for biopsy A61B10/02)
- A61B 17/3423: {Access ports, e.g. toroid shape introducers for instruments or hands (access sites for liquids A61M39/0247)}
- A61B 17/3474: {Insufflating needles, e.g. Veress needles}
- A61B 17/3478: {Endoscopic needles, e.g. for infusion (biopsy needles A61B10/0233; catheters with injection needles A61M25/0067)}
- A61B 17/3494: {with safety means for protection against accidental cutting or pricking, e.g. limiting insertion depth, pressure sensors (for the peridural space A61B17/3401)}
- A61B 17/3496: {Protecting sleeves or inner probes; Retractable tips (for protecting body piercing guide needles A61M25/0612)}
- A61B 17/3498: {Valves therefor, e.g. flapper valves, slide valves (haemostasis valves A61M39/06; check valves A61M39/24)}
- A61B 90/361: {Image-producing devices, e.g. surgical cameras}
- A61B 2017/00331: {with preformed bends}
- A61B 2017/00862: {elastic or resilient}
- A61B 2017/00867: {shape memory effect}
- A61B 2017/00907: {for light}
- A61B 2017/320024: {Morcellators, e.g. having a hollow cutting tube with an annular cutter for morcellating and removing tissue}
- A61B 2017/3445: {used as instrument channel for multiple instruments}
- A61B 2017/3456: {blunt}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A trocar system, having a trocar, a trocar sleeve, an optical channel extending coaxially in the trocar for receiving an optical unit, and a hollow transparent distal tip of the trocar, which can be observed from the interior by means of the optical unit, wherein a working channel extends continuously from the proximal end to the distal end in the trocar and opens into an outlet opening in the region of the distal end, and wherein the inner wall of the working channel is formed at least in an axially continuous sub-region of the circumference thereof by the trocar sleeve.

## Claims

### Claim 1

A trocar system, comprising:
a trocar, the trocar having a trocar sleeve, an optical channel extending coaxially inside the trocar for receiving an optical unit, and a hollow, transparent distal tip of the trocar, wherein the distal tip can be observed from inside the trocar by an the optical unit,
a working channel that continuously extends from a proximal end to a distal end inside the trocar and opens in an area of the distal end into an outlet opening, wherein an interior wall of the working channel is formed by a trocar sleeve at least in one axial partial area of a circumference thereof.

### Claim 2 (depends on 1)

The trocar system according to claim 1,
wherein the working channel is a continuous bore inside a wall of the trocar sleeve, wherein the trocar sleeve (16) forms an interior wall of the working channel around an entire circumference thereof.

### Claim 3 (depends on 1)

The trocar system according to claim 1,
wherein the working channel is an axially extending groove in an interior wall surface of the trocar sleeve and the groove has an open circumferential area, wherein the open circumferential area of the groove is closed off by an exterior jacket surface of the trocar.

### Claim 4 (depends on 1)

The trocar system according to claim 1,
wherein the working channel is an axially extending groove inside an exterior jacket surface of the trocar and the groove has an open circumferential area, wherein the open circumferential area of the groove is closed off by the interior wall surface of the trocar sleeve.

### Claim 5 (depends on 1)

The trocar system according to claim 1,
wherein the working channel comprises axially extending grooves in an exterior jacket surface of the trocar and in an interior surface of the trocar sleeve, which are congruent in angular position thereof.

### Claim 6 (depends on 1)

The trocar system according to claim 1,
wherein a circular-cylindrical shell is located between an exterior jacket surface of the trocar and an interior wall surface of the trocar sleeve that leaves an angle at circumference axially continuously free, wherein the area of the angle at circumference is closed on the inside by the exterior jacket surface of the trocar and on the outside by the interior wall surface of the trocar sleeve, thereby forming the working channel.

### Claim 7 (depends on 1)

The trocar system according to claim 1,
wherein the working channel is comprises a small tube that is mounted on an exterior jacket surface of the trocar sleeve.

### Claim 8 (depends on 1)

The trocar system according to claim 1,
wherein an axially continuous bore is located inside the wall of the trocar sleeve as an insufflation channel for introducing a gas for insufflation.

### Claim 9 (depends on 1)

The trocar system according to claim 1,
wherein a valve is disposed proximally on the trocar sleeve that allows for a sealed passage of the trocar and that closes the trocar sleeve off when the trocar is not inserted, and wherein the proximal inlet opening of the working channel is disposed outside of the valve.

### Claim 10 (depends on 1)

The trocar system according to claim 1,
wherein a miniature instrument can be inserted through the working channel, such that a distal working element of the miniature instrument exits at the distal end from the outlet opening of the working channel, and wherein a proximal actuating element of the miniature instrument is disposed proximally outside of an inlet opening of the working channel.

### Claim 11 (depends on 9)

The trocar system according to claim 9,
wherein the miniature instrument is a pair of scissors, a blade, a pair of tweezers, a clamp, a coagulation instrument, a Veress needle, a digital camera, a fiber-optic light guide, an illumination system or an optical unit.

### Claim 12 (depends on 11)

The trocar system according to claim 11,
wherein in the working channel, a small guide tube is disposed in an axially displaceable and rotatable manner, through which the miniature instrument can be traversed, and wherein the small guide tube is elastically preloaded to curve at least in the area of the distal end thereof.

### Claim 13 (depends on 12)

The trocar system according to claim 12,
wherein the small guide tube is made of a memory material having super-elastic properties.