Source: https://patents.google.com/patent/US9545248
Timestamp: 2018-04-24 05:09:15
Document Index: 282700506

Matched Legal Cases: ['Application No. 60', 'Application No. 12186717', 'Application No. 047017314', 'Application No. 11191175', 'Application No. 11191179', 'Application No. 11191184', 'Application No. 11191187', 'Application No. 11191189', 'Application No. 11191191', 'Application No. 11191193', 'Application No. 12186712', 'Application No. 12186716', 'Application No. 12186717', 'Application No. 12186720', 'Application No. 12186721', 'Application No. 12186722', 'Application No. 12186723', 'Application No. 12187929', 'Application No. 12187933']

US9545248B2 - Blunt tip obturator - Google Patents
Blunt tip obturator Download PDF
US9545248B2
US9545248B2 US14082558 US201314082558A US9545248B2 US 9545248 B2 US9545248 B2 US 9545248B2 US 14082558 US14082558 US 14082558 US 201314082558 A US201314082558 A US 201314082558A US 9545248 B2 US9545248 B2 US 9545248B2
US14082558
US20140121695A1 (en )
US20160345948A9 (en )
A surgical obturator comprising an elongate shaft extending along an axis between a proximal end and a distal end includes a bladeless tip disposed at the distal end of the shaft. The tip has a blunt point and a pair of shorter side surfaces separated by a relatively longer pair of opposing surfaces to form in radial cross-section a geometric shape that has a longer length and relatively narrower width. The side surfaces and opposing surfaces terminate in end surfaces located proximally from the blunt point. The end surfaces extend radially outwardly from opposite locations of the outer surface. A conical surface facilitates initial insertion of the obturator and the geometric shape facilitates separation of consecutive layers of muscle tissue having fibers oriented in different directions and provides proper alignment of the tip between the layers of muscle.
This application is a continuation of U.S. patent application Ser. No. 13/411,244 filed on Mar. 2, 2012, now U.S. Pat. No. 8,608,768, which is a continuation of U.S. patent application Ser. No. 12/836,023 filed on Jul. 14, 2010, now U.S. Pat. No. 8,152,828, which is a continuation of U.S. patent application Ser. No. 10/514,313, now U.S. Pat. No. 7,758,603, which entered the U.S. National Phase on Nov. 12, 2004 from International Application No. PCT/2003/014924, filed May 13, 2003, which published in English as International Patent Publication WO 2003/096879 A3, which claims the benefit of U.S. Provisional Patent Application No. 60/381,469, filed May 16, 2002; the disclosures of all of these applications and patents are incorporated by reference in their entireties herein.
In accordance with the present invention, a blunt tip obturator similar to that described in international application No. PCT/US02/06759 further including a cone at its distal tip is disclosed with characteristics that reduce the force required to penetrate the abdominal wall. The addition of the cone also reduces the tendency for the abdominal wall and the peritoneum to deflect or “tent” during insertion of the obturator. The blunt cone tip obturator of the invention penetrates and twists radially from a distal end to a proximal end of the tip. The blunt cone tip obturator facilitates insertion with a reduced penetration force as the user moves the tip back and forth radially while applying an axial penetration force. The blunt cone tip obturator can be directed and inserted between the fibers and then rotated to provide increased penetration and fiber separation.
FIG. 1 illustrates a side view of a trocar system including a cannula with associated valve housing, and an obturator with a blunt cone tip extending through the working channel of the cannula to facilitate placement across the abdominal wall according to the present invention;
FIG. 1A illustrates a side sectional view taken along line 1A-1A of of the trocar system FIG. 1 according to the present invention;
FIG. 3 is a side elevation view of the blunt cone tip taken along line 3-3 of FIG. 2 according to the present invention;
FIG. 4 is an end view taken along line 4-4 of the blunt cone tip of FIG. 2 according to the present invention;
FIG. 5 is a radial cross-section view taken along line 5-5 of the blunt cone tip of FIG. 2 according to the present invention;
FIG. 6 is a radial cross-section view taken along line 6-6 of the blunt cone tip of FIG. 2 according to the present invention;
FIG. 7 is a radial cross-section view taken along line 7-7 of the blunt cone tip of FIG. 2 according to the present invention;
FIG. 8 is a radial cross-section view taken along line 8-8 of the blunt cone tip of FIG. 2 according to the present invention;
FIG. 9 is a radial cross-section view taken along line 9-9 of the blunt cone tip of FIG. 2 according to the present invention; and
FIG. 10 is a schematic view illustrating each of the FIGS. 4-9 super-imposed to facilitate an understanding of the blunt cone tip and its twisted configuration according to the present invention.
A trocar system is illustrated in FIGS. 1 and 1A and is designated by reference numeral 10. This system includes a cannula 12, defining a working channel 14, and a valve housing 16. The system 10 also includes an obturator 18 having a shaft 21 extending along an axis 23. A handle 25 is disposed at a proximal end of the shaft at 21 while a blunt cone tip 27 is disposed at a distal end of the shaft 21. The shaft 21 of the obturator 18 is sized and configured for disposition within the working channel 14 of the cannula 12. With this disposition, the obturator 18 can be directed to penetrate a body wall such as the abdominal wall to provide the cannula 12 with access across the wall and into a body cavity, such as the peritoneal or abdominal cavity. The blunt cone tip 27 serves to direct the obturator 18 through the abdominal wall and the peritoneum, and can be removed with the obturator 18 once the cannula 12 is operatively disposed with the working channel 14 extending into the abdominal cavity.
As views are taken along progressive proximal cross sections, it can be seen that the circle 64 becomes larger and the rectangle 63 becomes less twisted, and the width increases relative to the length of the rectangle 63. The spiral nature of the blunt cone tip 27 is also apparent as the circle 64 and rectangle 63 move counterclockwise around the axis 23. This is perhaps best appreciated in a comparison of the circle 64 and the rectangle 63 in FIG. 6 relative to that in FIG. 5. With progressive proximal positions, the circle 64 begins to expand with increasing circular area and the rectangle 63 begins to widen with a reduction in the ratio of length to width. The long sides of the rectangle 63 also tend to become more arcuate as they approach a more rounded configuration most apparent in FIGS. 8 and 9. That is, the circle 64 and the rounded rectangle 63 become more concentric with progressive proximal positions. Furthermore, the circle 64 expands at a lesser rate than the rectangle 63, which eventually absorbs the circle 64 as shown in FIGS. 8 and 9. In these figures, it will also be apparent that the rotation of the rectangle 63 reaches a most counterclockwise position and then begins to move clockwise. This is best illustrated in FIGS. 7-9. This back and forth rotation results from the configuration of the side surfaces 54 and 56, which in general are U-shaped as best illustrated in FIGS. 2 and 3.
The ratio of the length to width of the rectangle 63 is dependent on the configuration of the side surfaces 54 and 56, which define the short sides of the rectangle 63 as well as the configuration of the surfaces 50 and 52, which define the long sides of the rectangle 63. Again with reference to FIGS. 2 and 3, it can be seen that the side surfaces 54 and 56 are most narrow at the end surfaces 58 and 59. As the side surfaces 54 and 56 extend proximally, they reach a maximum width near the point of the most counterclockwise rotation, shown generally in FIG. 8, and then reduce in width as they approach the proximal end 61. Along this same distal to proximal path, the surfaces 50 and 52 transition from a generally flat configuration at the end surfaces 58 and 59 to a generally rounded configuration at the proximal end 61.
A preferred method of operating the trocar system 10 benefits significantly from this preferred shape of the blunt cone tip 27. With a conical configuration at the distal point and a rectangular configuration at a distal portion of the tip, the tip 27 appears much like a flathead screwdriver having a cone at its tip. Specifically, the blunt tip includes a conical structure extending outward from the end surfaces 58 and 59 that serves to direct the obturator through the abdominal wall and peritoneum. The cone tip has a radius of approximately 0.025″. The incorporation of the cone onto the rectangular configuration reduces the insertion force required to traverse the abdominal wall. An advantage of the obturator of the invention is it provides a safer and more controlled entry of the abdominal cavity.
1. A surgical obturator, comprising:
an elongate shaft extending along a longitudinal axis between a proximal end and a distal end; and
a bladeless tip disposed at the distal end of the shaft having a conical surface forming proximally into an outer surface and distally to a blunt surface, said outer surface extending distally to the conical surface and having a pair of opposing surfaces separated by a pair of side surfaces;
wherein the conical surface extends proximally from the blunt surface and is formed into the pair of opposing surfaces such that a portion of the conical surface formed in the opposing surfaces defines an intersection that is generally U-shaped;
wherein the side surfaces define short sides of a rectangle and the opposing surfaces define long sides of the rectangle in a cross-section taken perpendicular to the longitudinal axis and along the outer surface; and
wherein the side surfaces increase in length with consecutive proximal cross-sections taken perpendicular to the longitudinal axis.
2. The surgical obturator of claim 1 wherein a cross-section taken perpendicular to the longitudinal axis and along the conical surface in the location where the conical surface is formed into the pair of opposing surfaces is defined by the opposing surfaces, side surfaces and the conical surface; wherein the conical surface in the cross-section appears as two oppositely disposed curves extending outwardly from the opposing surfaces.
3. The surgical obturator of claim 1 further including two end surfaces extending radially outwardly from the conical surface; wherein the conical surface extends distally of the end surfaces and the portion of the conical surface formed in the opposing surfaces extends proximally of the end surfaces.
4. The surgical obturator of claim 1 wherein the side surfaces are twisted about the axis.
5. The surgical obturator of claim 1 wherein the opposing surfaces transition from a generally flat configuration to a generally rounded configuration with consecutive proximal cross-sections perpendicular to the longitudinal axis.
6. The surgical obturator of claim 1 wherein a plane drawn through the longitudinal axis defines two symmetrical halves in a cross-section of the tip taken perpendicular to the longitudinal axis.
7. The surgical obturator of claim 1 wherein a cross-section of the conical surface defines a circle having a circular area that increases with consecutive proximal cross-sections.
8. The surgical obturator of claim 1 wherein the obturator is configured as an insufflation needle and provided with a passageway to administer insufflation gas.
9. The surgical obturator of claim 1 wherein the side surfaces extend radially outwardly with progressively proximal positions along the longitudinal axis.
10. The surgical obturator of claim 1 wherein the tip twists radially from a distal end of the tip to a proximal end of the tip.
11. A surgical obturator, comprising:
wherein the side surfaces are twisted about the axis in a first radial direction and a second radial direction opposite to the first radial direction.
12. The surgical obturator of claim 11 wherein the side surfaces define short sides of a rectangle and the opposing surfaces define long sides of the rectangle in a cross-section taken perpendicular to the longitudinal axis and along the outer surface.
13. The surgical obturator of claim 11 wherein the side surfaces increase in length and then decrease in length with consecutive proximal cross-sections perpendicular to the longitudinal axis.
14. A surgical obturator, comprising:
wherein a ratio of the lengths of the opposing surfaces to side surfaces decreases with progressively proximal cross-sections taken perpendicular to the longitudinal axis.
15. A surgical obturator, comprising:
wherein a ratio of the lengths of the opposing surfaces to the side surfaces decreases and then increases with progressively proximal cross-sections taken perpendicular to the longitudinal axis.
US14082558 2002-05-16 2013-11-18 Blunt tip obturator Active US9545248B2 (en)
US38146902 true 2002-05-16 2002-05-16
PCT/US2003/014924 WO2003096879A3 (en) 2002-05-16 2003-05-13 Cone tip obturator
US10514313 US7758603B2 (en) 2002-05-16 2003-05-13 Blunt tip obturator
US12836023 US8152828B2 (en) 2002-05-16 2010-07-14 Blunt tip obturator
US13411244 US8608768B2 (en) 2002-05-16 2012-03-02 Blunt tip obturator
US14082558 US9545248B2 (en) 2002-05-16 2013-11-18 Blunt tip obturator
US15370122 US20170164976A1 (en) 2002-05-16 2016-12-06 Blunt tip obturator
US13411244 Continuation US8608768B2 (en) 2002-05-16 2012-03-02 Blunt tip obturator
US15370122 Continuation US20170164976A1 (en) 2002-05-16 2016-12-06 Blunt tip obturator
US20140121695A1 true US20140121695A1 (en) 2014-05-01
US20160345948A9 true US20160345948A9 (en) 2016-12-01
US9545248B2 true US9545248B2 (en) 2017-01-17
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US10514313 Active 2025-06-03 US7758603B2 (en) 2002-05-16 2003-05-13 Blunt tip obturator
US12836023 Active US8152828B2 (en) 2002-05-16 2010-07-14 Blunt tip obturator
US13411244 Active US8608768B2 (en) 2002-05-16 2012-03-02 Blunt tip obturator
US13586825 Active US8377090B2 (en) 2002-05-16 2012-08-15 Blunt tip obturator
US14082558 Active US9545248B2 (en) 2002-05-16 2013-11-18 Blunt tip obturator
US15370122 Pending US20170164976A1 (en) 2002-05-16 2016-12-06 Blunt tip obturator
US (6) US7758603B2 (en)
EP (2) EP2316361B1 (en)
JP (1) JP2005525860A (en)
CA (1) CA2485481A1 (en)
DE (1) DE60337002D1 (en)
WO (1) WO2003096879A3 (en)
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