Single port access system
View Patent ↗Embodiments of a surgical access system useful for single or limited port procedures comprise a trocar comprising a fixation cannula, a retractor, and a gel cap removably coupled to the retractor. The gel cap comprises a gel pad that acts as an artificial body wall, through which instruments may be inserted into a body cavity, either directly or through one or more trocars. The fixation cannula comprises a retainer and a bolster, which together, capture the artificial body wall therebetween, thereby fixing the trocar thereto. The gel pad permits flexible instrument placement, as well as translational and angular degrees of freedom for the instruments while maintaining a gas tight seal.
1. A surgical access system comprising a trocar comprising: a fixation cannula comprising a tubular cannula body comprising a proximal end, a distal end, a longitudinal axis extending from the proximal end to the distal end; and a cannula wall defining a cannula lumen; a seal assembly coupled to the proximal end of the cannula body; a retainer extending from the cannula body; a locking component disposed on the cannula body and spaced from the retainer; and a bolster engagable to the locking component, wherein the trocar has an insertion configuration in which the bolster is not engaged to the locking component, the trocar has a fixation configuration in which the bolster is engaged to the locking component, an artificial body wall, wherein the artificial body wall comprises a gel pad, wherein the gel pad is coupled to a cap ring, thereby defining a gel cap; an adjustable wound retractor, wherein the adjustable wound retractor is couplable to the gel cap, and in the fixation configuration, the retainer and the bolster are dimensioned and configured to capture the artificial body wall therebetween, thereby fixing the cannula to the artificial body wall.
2. The surgical access system of claim 1 , wherein the trocar is a 5 -mm trocar.
3. The surgical access system of claim 1 , wherein the cannula comprises at least one of polycarbonate and polyester.
4. The surgical access system of claim 1 , wherein the seal assembly comprises a septum valve and a duckbill valve.
5. The surgical access system of claim 1 , wherein the retainer is disposed at the distal end of the cannula body and the locking component is proximal of the retainer.
6. The surgical access system of claim 1 , wherein the retainer comprises a radially extending flange.
7. The surgical access system of claim 6 , wherein a diameter of the retainer flange is from about 1.5 to about 2.5 times wider than an outer diameter of the cannula body.
8. The surgical access system of claim 1 , wherein a distal end of the retainer tapers.
9. The surgical access system of claim 1 , wherein the locking component comprises an enlarged section.
10. The surgical access system of claim 1 , wherein the locking component comprises a circumferential lip.
11. The surgical access system of claim 1 , wherein the bolster comprises an elastomeric material.
12. The surgical access system of claim 1 , wherein the bolster comprises a torus comprising an opening through with the cannula body extends.
13. The surgical access system of claim 1 , wherein a diameter of the bolster is from about 0.8 to about 2 times a diameter of a flange.
14. The surgical access system of claim 1 , wherein in the fixation configuration, the locking component resists disengagement of the bolster.
15. The surgical access system of claim 1 , wherein in the fixation configuration, a distance between the retainer and the bolster is adjustable.
16. The surgical access system of claim 1 , further comprising an obturator.
17. A surgical access system comprising:
an adjustable wound retractor comprising:
an proximal ring, distal ring, and a flexible, tubular retraction sheath extending between the proximal ring and the distal ring,
wherein the proximal ring is rotatable around an annular axis thereof, thereby adjusting a length of the retraction sheath between the proximal ring and the distal ring;
a gel cap comprising a cap ring and a gel pad coupled with the cap ring, wherein the cap ring is engagable with the proximal ring; and
a trocar comprising:
a fixation cannula comprising a tubular cannula body comprising a proximal end, a distal end, a longitudinal axis extending from the proximal end to the distal end; and a cannula wall defining a cannula lumen;
a seal assembly coupled to the proximal end of the cannula body;
a retainer extending from the cannula body;
a locking component disposed on the cannula body and spaced from the retainer; and
a bolster engagable to the locking component,
wherein
the trocar has an insertion configuration in which the bolster is not engaged to the locking component,
the trocar has a fixation configuration in which the bolster is engaged to the locking component, and
in the fixation configuration, the retainer and the bolster are dimensioned and configured to capture the gel pad therebetween, thereby fixing the cannula to the gel pad.
18. The surgical access system of claim 17 wherein the locking component has a lip with a distal end and the retainer has a proximal face with a distance between the distal end of the lip to the proximal face of the retainer being equal to a sum of a thickness of the bolster and the gel pad.
19. The surgical access system of claim 18 wherein the lip locks the bolster in place preventing it from moving proximally and locks the trocar to the gel pad.
20. The surgical access system of claim 18 wherein the locking component comprises an enlarged section having a diameter greater than an outer diameter of the cannula and smaller than a diameter of the retainer and a diameter of the distal end of the lip.
21. The surgical access system of claim 20 wherein the enlarged section is longer than the thickness of the bolster and does not extend to the retainer.
22. The surgical access system of claim 20 wherein the enlarged section has a smooth outer surface.
23. The surgical access system of claim 17 wherein the bolster is not disengagable from the locking component.