# US 8,771,306 B2 · Insertion device and method of use

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- Number: US 8,771,306 B2
- Document ID: US8771306B2
- Status: Granted
- Kind: B2
- Application number: 13/020,825
- Filed: 2011-02-04
- Published: 2011-09-15
- Granted: 2014-07-08
- Earliest claimed: 2010-03-11
- Assignees: Covidien LP
- Applicants: Gregory Fischvogt; Tia Ferrarotti
- Inventors: Gregory Fischvogt; Tia Ferrarotti
- Web page: https://patentgrep.com/patent/US8771306B2

## CPC

- 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 17/3209: Incision instruments
- A61B 2017/320052: {Guides for cutting instruments}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

An insertion device for safely creating an incision through tissue is provided. The device includes a tubular member and a cutting assembly. The tubular member includes proximal and distal ends and defines a passageway therethrough. The tubular member includes at least one longitudinal slot extending proximally from a distal end thereof. The cutting assembly includes a blade assembly mounted on a distal end thereof. The distal end of the cutting assembly is configured for sliding reception within the passageway of the tubular member. The blade assembly includes at least one blade movable between a retracted position and an extended position. The blade assembly is configured such that the at least one blade is received through the at least one longitudinal slot of the tubular member when the at least one blade is in an extended position.

## Claims

### Claim 1

A method of creating an incision in tissue, the method including:
providing an insertion device having a tubular member and a cutting assembly, wherein the tubular member includes at least one longitudinal slot extending proximally from a distal end thereof and is configured to be received through tissue, wherein a blade assembly of the cutting assembly is configured to be slidingly received through the longitudinal slot of the tubular member;
inserting the distal end of the tubular member through tissue and into a body cavity;
inserting the cutting assembly through the tubular member;
moving at least one blade of the blade assembly from a retracted position in which a linear cutting surface of the at least one blade is disposed along the tubular member to an extended position in which the linear cutting surface of the at least one blade is disposed transverse to the tubular member such that the at least one blade of the blade assembly is received through the longitudinal slot of the tubular member; and
retracting the cutting assembly relative to the tubular member to create an incision about the tubular member.

### Claim 2 (depends on 1)

The method of claim 1, further including inserting an access port through the tissue about the tubular member.

### Claim 3 (depends on 2)

The method of claim 2, further including removing the tubular member from within the access port.

### Claim 4 (depends on 2)

The method of claim 2, further including removing the access port from within the tissue and closing the incision.

### Claim 5 (depends on 1)

The method of claim 1, further including retracting the cutting assembly from within the tubular member.