# US 8,771,223 B2 · Cannula anchor

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- Number: US 8,771,223 B2
- Document ID: US8771223B2
- Status: Granted
- Kind: B2
- Application number: 14/015,076
- Filed: 2013-08-30
- Published: 2014-01-02
- Granted: 2014-07-08
- Earliest claimed: 2008-10-23
- Assignees: Stryker Corporation
- Applicants: Stryker Corporation
- Inventors: Michael Patton; Harrith Hasson; Thane Blinman
- Web page: https://patentgrep.com/patent/US8771223B2

## CPC

- A61B 17/3423: {Access ports, e.g. toroid shape introducers for instruments or hands (access sites for liquids A61M39/0247)}
- A61B 17/3421: {Cannulas}
- A61B 17/06061: {Holders for needles or sutures, e.g. racks, stands (hand-held holding instruments A61B17/0483; holders for articles A61B50/20; racks for syringes or for hypodermic or infusion needles A61M5/008)}
- A61B 2017/349: {Trocar with thread on outside}
- A61B 2017/3492: {against the outside of the body}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

Cannula anchor assemblies are disclosed which consist of a threaded cannula and a cannula anchor. The cannula anchor system allows for secure anchoring into the body wall, and proper cannula height adjustment prior to and during surgery. Sutures through the body wall may be secured to the cannula anchor either directly through the cannula anchor, or around suture posts attached therein. The cannula anchor also prevents excessive plunge of a trocar into the patient. The cannula anchor is generally configured with internal threads that mate with a threaded cannula.

## Claims

### Claim 1

A method of affixing a cannula to an abdominal wall comprising:
inserting an externally threaded cannula into an abdominal cavity of a patient during a laparoscopic surgical procedure, wherein internal threads of an anchor positioned around the cannula align with external threads of the cannula;
adjusting the anchor to abut the outside wall of the patient's abdomen by rotating the anchor relative to the cannula;
securing the anchor to the outside of the patient's abdominal wall by passing sutures through an opening in the anchor and through a portion of the abdominal wall.

### Claim 2 (depends on 1)

The method of claim 1, wherein the distance between the anchor and the outside wall of the patient's abdomen is adjustable after the anchor has been secured to the outside of the patient's abdominal wall by rotating the anchor relative to the cannula.

### Claim 3 (depends on 1)

The method of claim 1, further including passing sutures through the opening in the anchor during the surgical procedure to close the opening in the abdominal cavity.

### Claim 4

A method of affixing a suture cone to an abdominal wall comprising:
inserting an externally threaded cannula into an abdominal cavity of a patient during a laparoscopic surgical procedure, wherein an anchor is disposed around the cannula, the anchor having internal threads that align with external threads of the cannula, and wherein a suture cone is disposed around the cannula, the suture cone having one or more suture posts around which sutures may be wrapped during the surgical procedure;
adjusting the anchor to abut the outside wall of the patient's abdomen by rotating the anchor relative to the cannula;
securing the suture cone, but not the anchor, to the outside wall of the patient's abdomen by passing sutures through an opening in the anchor and through a portion of the abdominal wall.