Micro-orifice surgical access system

Patent metadata

Field	Value
Publication number	US-9072501-B2
Application number	US-201313833156-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Mar 15, 2013
Publication date	Jul 7, 2015
Grant date	Jul 7, 2015

Abstract

A surgical access system including an access port device. The port device has a port member, a plurality of blades, and an articulation mechanism. The blades are circumferentially arranged about a longitudinal axis of the port member to collectively define an access region. The articulation mechanism defines a pivot point along a length of each blade, and is operable to articulate the blades between collapsed and expanded states. The blade tips collectively define a diameter in the collapsed state that is less than that in the expanded state. The blades rotate about the corresponding pivot point, and the pivot points move longitudinally relative to the port member, in transitioning between the contracted and expanded states. Light source(s) can be integrated with the blades or separately provided to enhance surgical field visibility.

First claim

What is claimed is:

1. A surgical access system comprising:
a port access device including:
a port member defining a central passageway extending along a central longitudinal axis;
a plurality of blades circumferentially arranged about the longitudinal axis to collectively define an access region open to and extending distally from the central passageway, wherein each of the blades terminates at a tip opposite the port member; and
an articulation mechanism including a drive collar and configured to define a first pivot point along a length of each of the blades, each of the first pivot points establishing an axis of rotation that extends through the port member, the articulation mechanism being operable to articulate the blades between:
a collapsed state in which the tips collectively define a first diameter,
an expanded state in which the tips collectively define a second diameter greater than the first diameter,

wherein the articulation mechanism is configured such that the blades rotate about the corresponding first pivot point, and the first pivot points move longitudinally relative to the port member parallel with the longitudinal axis, in transitioning between the collapsed and expanded states.

2. The surgical access system of claim 1 , wherein each of the blades pivots in a respective plane that is substantially tangent to a circumference of the port member in transitioning between the first and second states.

3. The surgical access system of claim 1 , wherein the tips are co-planar in the first and second states.

4. The surgical access system of claim 1 , wherein the plurality of blades are identical.

5. The surgical access system of claim 1 , wherein the plurality of blades includes at least six blades.

6. The surgical access system of claim 1 , wherein the articulation mechanism is configured to transition between the collapsed and expanded states with rotation of the port member.

7. The surgical access system of claim 1 , wherein the articulation mechanism further establishes a second pivot point along a length of each of the blades, and further wherein the articulation mechanism is configured such that each of the blades rotate about the corresponding second pivot point in transitioning between the collapsed and expanded states.

8. The surgical access system of claim 7 , wherein the articulation mechanism is configured such that the second pivot points move longitudinally relative to the port member in transitioning between the collapsed and expanded states.

9. The surgical access system of claim 8 , wherein the articulation mechanism includes a plurality of links, respective ones of which are connected to respective ones of the blades at the corresponding second pivot point.

10. The surgical access system of claim 9 , wherein the articulation mechanism further includes a hub rotatably mounted to the port member and pivotably connected to each of the links.

11. The surgical access system of claim 10 , wherein the drive collar is threadably mounted to the port member and pivotably connected to each of the blades at the corresponding first pivot point.

12. The surgical access system of claim 11 , wherein the articulation mechanism is configured such that rotation of the port member relative to the hub imparts a longitudinal movement on to the drive collar.

13. The surgical access system of claim 12 , wherein the articulation mechanism is configured such that longitudinal movement of the drive collar applies a force on to the each of the blades at the corresponding first pivot point, with the blades rotating about the corresponding second pivot point in response to the force.

14. The surgical access system of claim 13 , wherein the hub remains stationary as the blades transition between the collapsed and expanded states.

15. The surgical access system of claim 1 , wherein the port access device further includes:
a first LED mounted to an interior surface of a first one of the blades; and
a second LED mounted to an interior surface of a second one of the blades.

16. The surgical access system of claim 1 , further comprising:
an illumination assembly including a light ring device configured to be selectively connected to the port access device and including a light source arranged to emit light toward the access region upon connection of the light ring device with the port access device.

17. The surgical access system of claim 16 , wherein the illumination assembly further includes a transparent tube couple to the port member for transmitting light from the light ring device.

18. The surgical access system of claim 1 , wherein at least one of the blades includes:
a blade body forming the tip and a mounting end opposite the tip; and
a shaft removably attached to the mounting end, the first pivot point being formed along the shaft.

19. The surgical access system of claim 1 , further comprising:
an anchoring device configured to selectively receive and maintain the access port device relative to a patient.

20. The surgical access system of claim 19 , wherein the access port device further includes a flange associated with, and projecting radially outward relative to, the port member, and further wherein the anchoring device includes:
a receiving apparatus forming an aperture sized to permit passage of the blades in the collapsed state and to receive the flange; and
a plurality of platforms extending from the receiving apparatus and configured for securement to a patient.

21. The surgical access system of claim 20 , wherein the receiving apparatus includes:
an outer frame member defining an interior socket surface; and
a receiving body defining a semi-spherical outer surface;
wherein the receiving body is rotatably disposed within the frame member such that the interior socket surface and the semi-spherical outer surface combine to define a ball joint;
and further wherein the receiving member defines the aperture for selectively engaging the flange.

22. The surgical access system of claim 21 , wherein the receiving apparatus further includes a locking mechanism including a fastener and configured to selectively inhibit movement of the receiving body relative to the outer frame.

Assignees

• Univ Minnesota
• Univ Minnesota

Inventors

• Menchaca Hector J
• Michalek Van N
• Suguitani Nestor B
• Buchwald Henry
• Oura Mitsuhiro
• Erdman Arthur G

Classifications

• A61B17/0293

  with ring member to support retractor elements · CPC title

• A61B17/02 Primary

  for holding wounds open, e.g. retractors; Tractors · CPC title

• A61B2017/345

  for introduction into a natural body opening · CPC title

• A61B17/3439

  with means for changing the inner diameter of the cannula, e.g. expandable (A61B17/3423, A61B17/3431 take precedence; catheters A61M25/0662) · CPC title

• A61B17/3431

  being collapsible, e.g. made of thin flexible material (A61B17/3423 takes precedence) · CPC title