the access ports of the present disclosure , either alone or in combination with a cannula assembly , provide a substantially fluid - tight seal between a body cavity of a patient and the outside atmosphere . the access ports , or seal assemblies , of the present disclosure are configured to receive surgical instruments of varying diameter . various surgical procedures contemplated include laparoscopic and arthroscopic surgical procedures . the access ports of the present disclosure contemplate the introduction of various types of instrumentation adapted for insertion through a trocar and / or cannula assembly while maintaining a substantially fluid - tight interface about the instrument to help preserve the atmospheric integrity of a surgical procedure from gas and / or fluid leakage . examples of instrumentation include , but are not limited to , clip appliers , graspers , dissectors , retractors , staplers , laser probes , photographic devices , endoscopes and laparoscopes , tubes , and the like . such instruments will collectively be referred to as “ instruments ” or “ instrumentation .” embodiments of the presently disclosed apparatus will now be described in detail with reference to the drawings , in which like reference numerals designate identical or corresponding elements in each of the several views . as used herein , the term “ distal ” refers to that portion of the tool , or component thereof which is further from the user while the term “ proximal ” refers to that portion of the tool or component thereof which is closer to the user . while the use of the access assembly is often described herein as engaging an incision , it should be recognized that this is merely exemplary and is not intended to limit the use of the assembly in any way , but rather it should be recognized that the present disclosure is intended to be useable in all instances in situations in which the access assembly engages an incision , a naturally occurring orifice , or any other suitable opening . the port is usable through an incision or through a naturally occurring orifice . referring to fig1 - 4b , a surgical apparatus 10 for use in a surgical procedure , e . g ., a minimally invasive procedure is illustrated . surgical apparatus 10 includes seal anchor member 100 ( or access assembly or access port ) defining a longitudinal axis “ a ” and having respective trailing ( or proximal ) and leading ( or distal ) ends 102 , 104 and an intermediate portion 106 disposed between the trailing and leading ends 102 , 104 . seal anchor member 100 includes one or more ports 108 that extend longitudinally between trailing and leading ends 102 , 104 , respectively , and through seal anchor member 100 . seal anchor member 100 is preferably formed from a suitable foam material having sufficient compliance to form a seal about one or more surgical objects , and also establish a sealing relation with the tissue , “ t .” proximal end 102 of seal anchor member 100 defines a first diameter d 1 and distal end 104 defines a second diameter d 2 . in one embodiment of seal anchor member 100 , the respective first and second diameters d 1 , d 2 of the proximal and distal ends 102 , 104 are substantially equivalent , as seen in fig1 , although an embodiment of seal anchor member 100 in which diameters d 1 , d 2 are different is also within the scope of the present disclosure . as depicted in fig1 , proximal and distal ends 102 , 104 define substantially planar surfaces . however , embodiments are also contemplated herein in which either or both of proximal and distal ends 102 , 104 , respectively , define surfaces that are substantially arcuate to assist in the insertion of seal anchor member 100 within a tissue tract 12 defined by tissue surfaces 14 and formed in tissue “ t ,” e . g ., an incision , as discussed in further detail below . intermediate portion 106 defines a radial dimension “ r ” and extends longitudinally between proximal and distal ends 102 , 104 , respectively , to define an axial dimension or length “ l .” the radial dimension “ r ” of intermediate portion 106 varies along the axial dimension , or length , “ l ” thereof . accordingly , seal anchor member 100 defines a cross - sectional dimension that varies along its length “ l ,” which facilitates the anchoring of seal anchor member 100 within tissue “ t ,” as discussed in further detail below . however , an embodiment of seal anchor member 100 in which the radial dimension “ r ” remains substantially uniform along the axial dimension “ l ” thereof is also within the scope of the present disclosure . the radial dimension “ r ” of intermediate portion 106 is appreciably less than the respective diameters d 1 , d 2 of proximal and distal ends 102 , 104 such that seal anchor member 100 defines an “ hour - glass ” shape or configuration to assist in anchoring seal anchor member 100 within tissue “ t ,” as discussed in further detail below . however , in an alternate embodiment , the radial dimension “ r ” of intermediate portion 106 may be substantially equivalent to the respective diameters d 1 , d 2 of proximal and distal ends 102 , 104 . in cross section , intermediate portion 106 may exhibit any suitable configuration , e . g ., substantially circular , oval or oblong . referring now to fig1 and 4a , seal anchor member 100 is adapted to transition from an expanded condition to a compressed condition so as to facilitate the insertion and securement thereof within tissue tract 12 in tissue “ t .” in the expanded condition , seal anchor member 100 is at rest and the respective radial dimensions d 1 , d 2 of the proximal and distal ends 102 , 104 of seal anchor member 100 , as well as the radial dimension r of the intermediate portion 106 are such that the seal anchor member 100 cannot be inserted within tissue tract 12 . however , in the compressed condition , proximal and distal ends 102 , 104 of seal anchor member 100 , as well as intermediate portion 106 are dimensioned for insertion into tissue tract 12 . seal anchor member 100 may be formed of a biocompatible compressible material that facilitates the resilient , reciprocal transitioning of seal anchor member 100 between the expanded and compressed conditions thereof . in one embodiment , the compressible material is a “ memory ” foam . an external force may be applied to seal anchor member 100 to cause the seal anchor member 100 to assume the compressed condition . the external force may be directed inwardly and when seal anchor member 100 is subjected thereto , e . g ., when seal anchor member 100 is squeezed , seal anchor member 100 undergoes an appreciable measure of deformation , thereby transitioning into the compressed condition . referring again to fig1 , one or more positioning members 114 may be associated with either or both of trailing ( or proximal ) end 102 and distal ( or leading ) end 104 of seal anchor member 100 . positioning members 114 may be composed of any suitable biocompatible material that is at least semi - resilient such that positioning members 114 may be resiliently deformed and may exhibit any suitable configuration , e . g ., substantially annular or oval . prior to the insertion of seal anchor member 100 , positioning members 114 are deformed in conjunction with the respective proximal and distal ends 102 , 104 of seal anchor member 100 to facilitate the advancement thereof through tissue tract 12 ( fig4 a ). subsequent to the insertion of seal anchor member 100 within tissue tract 12 , the resilient nature of positioning members 114 allows positioning members to return to their normal , substantially annular configuration , thereby aiding in the expansion of either or both of the respective proximal and distal ends 102 , 104 and facilitating the transition of seal anchor member 100 from its compressed condition to its expanded condition . positioning members 114 also may engage the walls defining the body cavity to further facilitate securement of seal anchor member 100 within the body tissue . for example , positioning member 114 at leading end 104 may engage the internal peritoneal wall and positioning member 114 adjacent trailing end 102 may engage the outer epidermal tissue adjacent the incision 12 within tissue “ t .” in another embodiment of seal anchor member 100 , one or more additional positioning members 114 may be associated with intermediate portion 106 . in use , the peritoneal cavity ( not shown ) is insufflated with a suitable biocompatible gas such as , e . g ., co 2 gas , such that the cavity wall is raised and lifted away from the internal organs and tissue housed therein , providing greater access thereto . the insufflation may be performed with an insufflation needle or similar device , as is conventional in the art . either prior or subsequent to insufflation , a tissue tract 12 is created in tissue “ t ,” the dimensions of which may be varied dependent upon the nature of the procedure . prior to the insertion of seal anchor member 100 within tissue tract 12 , seal anchor member 100 is in its expanded condition in which the dimensions thereof prohibit the insertion of seal anchor member 100 into tissue tract 12 . to facilitate insertion , the clinician transitions seal anchor member 100 into the compressed condition by applying a force “ f ” thereto , e . g ., by squeezing seal anchor member 100 . as best depicted in the surgical apparatus 400 a of fig4 a , subsequent to its insertion , distal end 104 , positioning member 114 and at least a section 112 of intermediate portion 106 are disposed beneath the tissue “ t .” seal anchor member 100 is caused to transition from the compressed condition to the expanded condition by removing force “ f ” therefrom . after successfully anchoring seal anchor member 100 within the patient &# 39 ; s tissue “ t ,” one or more surgical objects may be inserted through ports 108 . fig4 a illustrates a surgical object introduced through one of ports 108 . as previously discussed , prior to the insertion of surgical object , port 108 is in its first state in which port 108 defines an initial dimension , in one embodiment , is a longitudinal slit . accordingly , prior to the escape of insufflation gas through port 108 , in the absence of surgical object is minimal , thereby preserving the integrity of the insufflated workspace . additionally , one or more surgical objects are inserted through a tube configuration , including an outer tube and an inner tube , as described with reference to fig2 a - 2c and 3 . fig2 a - 2c illustrate an outer tube 200 . fig2 a illustrates the outer tube 200 in a first configuration 200 a being a straight configuration . fig2 b illustrates the outer tube 200 in a second configuration 200 b being a first bent configuration . fig2 c illustrates the outer tube 200 in a third configuration 200 c being a second bent configuration . fig2 a - 2c illustrate how the outer tube 200 may bend or flex either to the left ( fig2 b ) or to the right ( fig2 c ). outer tube 200 includes a proximal end 210 , a distal end 220 , and a middle portion 230 . the middle portion 230 is a bendable or flexible portion . outer tube 200 may have a diameter , d a . in one embodiment , it is contemplated that the proximal end 210 and the distal end 220 are rigid or semi - rigid sections or portions . it is also contemplated that the proximal portion 210 , the distal portion 220 , and the middle portion 230 are of substantially equal length . therefore , the outer tube 200 may have two rigid sections 210 , 220 of substantially equal length separated by the flexible section 230 . however , one skilled in the art may contemplate a number of different lengths for the proximal portion 210 , the distal portion 220 , and the middle portion 230 . for example , the middle portion 230 may be smaller that the rigid portions 210 , 220 . fig3 illustrates an inner tube 300 having two pre - bent portions . for example , inner tube 300 may include a proximal portion 310 , a distal portion 320 , a first bend 330 , and a second bend 340 . thus , it is contemplated that the inner tube 300 has an “ s ” shaped configuration and reinforced with a rigid sleeve located between the pre - bent portions 330 , 340 . additionally , the inner tube 300 may be configured to slidably engage and advance through the outer tube 200 ( see fig2 a - 2c ). as such , the inner tube 300 and the outer tube 200 may be coaxial . moreover , as seen in fig5 a - 5b , the inner tube 300 may define at least one channel 512 for receiving at least one surgical instrument 510 as shown in fig5 a as a first configuration 500 a . fig5 b illustrates an inner tube 300 having at least two channels 522 , 532 for receiving two surgical instruments 520 , 530 , as shown in a second configuration 500 b . it is contemplated that at least one of the two channels 522 , 532 shown in fig5 b may be used for smoke evacuation from the surgical site . referring back to fig2 a - 2c and 3 , at least one pre - bent section 330 , 340 , of the inner tube 300 may cause a like direction bend of the flexible section 230 of the outer tube 200 , when the at least one pre - bent section 330 , 340 engages the flexible section 230 . additionally , at least one pre - bent section 330 , 340 of the inner tube 300 may cause the flexible section 230 of the outer tube 200 to bend in any direction based on rotation of a control mechanism 350 , when the at least one pre - bent section 330 , 340 engages the flexible section 230 of the outer tube 200 . the control mechanism 350 may be configured to rotate the inner tube 300 by 360 ° degrees . in operation , when the inner tube 300 is in a retracted configuration ( i . e ., outside the outer tube 200 ), an instrument is also located in a straight configuration . after insertion of the instrument into the inner tube 300 , the inner tube 300 may be pushed through the outer tube 200 by a control mechanism 350 . when the inner tube 300 is extended therethrough , the pre - bent section 330 moves forward and makes a left turn of articulation ( see surgical apparatus 400 b of fig4 b ). at the same time , the second pre - bent section 340 moves through the flexible section 230 of the outer tube 200 , thus making a right turn of articulation . in effect , the instrument is triangulated in the form of an “ s ” shape . in fig4 c , the inner tube is pushed further such that the distal portion 320 exits the distal end of the outer tube 200 . the second pre - bent section 340 is shown exiting the distal end of the outer tube 200 , thus changing the orientation of the flexible section 230 . when the inner tube 300 is retracted , the instrument straightens and may be removed from the outer tube 200 . as such , the inner tube 300 may be easily inserted and removed to and from the outer tube 200 at any articulated positions . as a result , the motion of articulation may be determined by extending or retracting the inner tube 300 and by rotating the outer tube 200 for a 360 ° triangulation . therefore , in summary , the surgical apparatus may include an instrument guide device including ( i ) an outer member having a proximal end and a distal end , the proximal and distal ends being rigid sections connected to each other via a flexible section and ( ii ) an inner member having at least two rigid bends and at least one channel extending therethrough . the inner member is then adapted to be inserted through and slidably engage the outer member such that at least one rigid bend of the inner member engages the flexible section of the outer member . as such , at least one rigid bend of the inner member may cause a like direction bend of the flexible section of the outer member , when the at least one rigid bend engages the flexible section . additionally , at least one rigid bend of the inner member may cause the flexible section of the outer member to bend in any direction based on rotation of a control mechanism , when the at least one rigid bend engages the flexible section . the inner member may also be connected to a control mechanism for controlling articulation of the inner member . while several embodiments of the disclosure have been shown in the drawings , it is not intended that the disclosure be limited thereto , as it is intended that the disclosure be as broad in scope as the art will allow and that the specification be read likewise . therefore , the above description should not be construed as limiting , but merely as exemplifications of presently disclosed embodiments . thus the scope of the embodiments should be determined by the appended claims and their legal equivalents , rather than by the examples given . persons skilled in the art will understand that the devices and methods specifically described herein and illustrated in the accompanying drawings are non - limiting exemplary embodiments . the features illustrated or described in connection with one exemplary embodiment may be combined with the features of other embodiments . such modifications and variations are intended to be included within the scope of the present disclosure . as well , one skilled in the art will appreciate further features and advantages of the present disclosure based on the above - described embodiments . accordingly , the present disclosure is not to be limited by what has been particularly shown and described , except as indicated by the appended claims .
a surgical device is provided including an access port having a tubular member with a first ring secured at a proximal end and a second ring secured at a distal end ; an articulation structure having an outer tube and an inner tube ; and a control mechanism coupled to one end of the inner tube for advancing the inner tube through the outer tube ; wherein the outer tube includes at least one rigid section and at least one flexible section and the inner tube includes at least two pre - bent sections .