|Publication number||US3854473 A|
|Publication date||Dec 17, 1974|
|Filing date||May 29, 1973|
|Priority date||May 29, 1973|
|Publication number||US 3854473 A, US 3854473A, US-A-3854473, US3854473 A, US3854473A|
|Original Assignee||Olympus Optical Co|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (4), Referenced by (85), Classifications (13)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent 1 1111 3,854,473 Matsuo Dec. 17, 1974  STILET FOR ENDOSCOPES 3,572,325 3/1971 Bazell et al. .t 128/6  Inventor: Kazumasa Matsuo, Tokyo, Japan FOREIGN PATENTS OR APPLICATIONS Assignee: Olympus C() Ltd. Tokyo Switzerland Japan Primary ExaminerLucie H. Laudenslager 9o 1 [n] Flled' May 1973 Attorney, Agent, or Firm-Flynn & Frishauf  Appl. No.: 364,258
 ABSTRACT 2? A stilet for endoscopes includes an elongated coil 158/8 6 4 5 spring to be inserted in the flexible tube of the endo- 1 0 can scope. The coil spring may be compressed or extended by operating a mechanism outside of the human body  References Cited so that the flexibilility of the coil spring and thus the UNITED STATES PATENTS flexible tube may be adjusted.
616.672 12/1898 Kelling 128/8 944.830 12/1909 Sussmann 128/8 9 Clalms, 3 Drawing Flgures l2 3 l 2(2 l STILET FOR ENDOSCOPES BACKGROUND OF THE INVENTION This invention relates to a stilet to be inserted in an endoscope for adjusting the flexibility of the endoscope to assist in smooth insertion of the scop into the cavity of a human body.
In recent years, the development of an endoscope has been remarkable in permitting the device to be inserted through the mouth as far as the stomach, duodenum and the small intestine, and through the anus as far as the rectum, sigmoid colon, descending colon, transverse colon and the ascending colon, for medical observation of these organs.
It is required than an endoscope operative for deep observation be sufficiently flexible and bendable so that the forward end thereof may smoothly reach a position of predetermined depth. It has heretofore been difficult to insert the device deeply because of the fact that it tends to be unnecessarily bent concentratedly at a relatively shallow portion of the human body such as the stomach to disturb advancement of the forward end of the device or because of its insufficient overall available length.
In an attempt to obviate this defect, a device has been proposed in which the flexibility of the flexible tube of the endoscope is progressively varied in such a manner that the tube is made relatively soft at its forward end and is made gradually harder at portions closer to the operation section. The endoscope of the arrangement in which the rigidity or flexibility of the tube is predetermined does not assist' to positively solve the above problem. The defect may be eliminated if the flexibility of the flexible tube is made adjustable, but with the prior art device, the construction of the tube to make it adjustable becomes complex, thereby resulting in a tube of an inconveniently increased diameter.
SUMMARY OF THE INVENTION Accordingly the object of the invention is to provide a stilet of simple construction and capable of being externally operated to optionally adjust the flexibility of a flexible tube of an endoscope by being inserted into the endoscope prior to the insertion of the device into the cavity of a human body.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross sectional elevation of a stilet embodying this invention;
FIG. 2 is a cross section taken along the line 22 in FIG. 1; and
FIG. 3 is a schematic view illustrating an endoscope employing the stilet of FIG. 1 as being in an operative inserted position.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION bore 13. The connecting ring 14 is attached to an adjusting cylinder 15 at its rear end so that the central bore 13 of the former is coaxially connected to the central bore of the latter. On the upper side of the front half portion of the adjusting cylinder 15 there is formed a row of triangular teeth 16 along the longitudinal direction thereof. On the lower side of the rear half portion of the adjusting cylinder 15 there is perforated a long slit 17 extending along the longitudinal direction and communicatingwith the central bore thereof. The triangular teeth 16 each may be in the shape of a rightangled triangle with the hypotenuse and vertical side respectively corresponding to the front and rear sides of the tooth. A sliding ring l8is fitted on the periphery of the adjusting cylinder 15 so as to slide along the rear half portion thereof. From the upper outer side of the ring 18 there is radially extended a projection 20 with its forked top portion forming a bearing 19. On the lower inner side of the ring 18 there is fixed a supporting plate 21 (see FIG. 2) extending into the central bore through the slit 17 of the adjusting cylinder 15. By means of this supporting plate 21, the sliding ring 18 may be supported on the adjusting cylinder to be slidable therealong without rotation of the sliding ring 18. A retracting vwire 22 is inserted through the central bores of the coil spring 11, connecting member 14 and adjusting ring which are'arranged in a coaxial relationship. The wire 22 is connected to the rear end of the guide member 12 and the forward side of the supporting plate 21 at its both ends to be stretched therebetween.
A lever 26 is rockably supported on the bearing 19 of the projection 20 by means of a pin 23. On the forward lower side of the lever 26 there are formed a plurality of teeth 24 engageable with the teeth 16 of the adjusting cylinder 15. The rear portion of the lever constitutes a handle 25. Between the sliding ring 18 and lever 26 there is connected a wire spring 27 so that, in the normal condition, the lever 26 is urged in the rotating direction of an arrow a to allow the teeth of the lever 26 to engage the teeth of the adjusting cylinder 15 thereby preventing the sliding of the sliding ring 18 in the backward direction by the coil spring 11.
With the stilet constructed above, when the sliding ring 18 is slid against the adjusting cylinder 15, so that the teeth 24 of the lever 26 pivoted on the sliding ring 18 are engaged with the extremely forward portion of the row of teeth, the retracting wire 22 takes the most loose condition in which the coil spring 1 l is most flexible. In this situation, as the sliding ring 18 is moved rearwards along the adjusting cylinder 15, the clearance between the adjacent turns of coil spring 11 is gradually made shorter, that is the coil spring is compressed to decrease its flexibility. When the desired flexibility is obtained, the ring 18 is stopped, so that its flexibility is maintained due to the engagement of the teeth of the lever 26 and adjusting cylinder 15. Alternatively, if it is desired to increase the flexibility of the coil spring 11, the lever 26 is rocked by operating the handle 25 to release the engagement of the teeth 16 and 24 so that the sliding ring 18 may be retracted forwards by the coil spring 11.
In the using of the stilet, the coil spring of the stilet is inserted into the flexible tube 30 of an endoscope from its forward end, thereby being located in the flexible tube in a substantially coaxial relationship there with as shown in FIG. 3. Then, the endoscope is inserted. into the deep portion of the cavity of the human body while the flexibility of the coil spring and thus the flexible tube 30 is adjusted by operating the lever outside the human body. Accordingly, the insertion of the flexible tube of the endoscope whose flexibility is adjusted as the endoscope is deeply inserted prevents the flexible tube from the unnecessarily concentrated bending in a cavity located on the way to the observed portion.
What is claimed is:
1. A stilet for varying the flexibility of an endoscope comprising: I
a coil spring having a central axis, said coil spring being adapted to be inserted in the flexible tube of an endoscope,
a retracting wire inserted throughthe coil spring substantially along said central axis, one end of the wire being operatively connected to one end of the coil spring, and
adjusting means provided on the other end of the coil spring and coupled to the other end of the wire to selectively tighten said wire relative to the coil spring to compress adjacent turns thereof closer to each other to stiffen the coil spring, or to retract and loosen the wire relative to the coil spring to render the spring more flexible, thereby selectively adjusting the flexibility of the coil spring and of the flexible endoscope tube in which the coil spring is inserted.
2. A stilet according to claim 1 wherein said adjusting means includes a cylindrical adjusting member in which said other end portion of the retracting wire is inserted and which is coaxial with the coil spring, a sliding ring mounted on the periphery of said cylindrical adjusting member so as to be slidable along its longitudinal direction and connected to said other end of the retracting wire, and a keeping mechanism operatively coupled with the sliding ring to maintain the sliding ring at the desired position.
3. A stilet according to claim 2 wherein said cylindrical adjusting member has at one end a connecting member to receive said other end of said coil spring and at one side of the other end a slit extending in a longitudinal direction of the adjusting cylindrical member, and said sliding ring has a guide plate extending to the internal bore of said cylindrical adjusting member through the slit.
4. A stilet according to claim 3 wherein said keeping mechanism includes a row of teeth formed on one side of said cylindrical adjusting member near the connecting ring along the longitudinal direction thereof and a lever pivotally mounted on the sliding ring and having at least one tooth engageable with the teeth of said cylindrical adjusting member.
5. A stillet according to claim 4 wherein said lever has a plurality of teeth thereon which are engageable with the teeth of said cylindrical adjusting member.
6. A stilet according to claim 5 wherein the lever further includes an urging member for urging the lever so that in an normal condition the teeth of the lever engage the teeth of the adjusting cylindrical member, and a handle to release the engagement of the teeth of the lever and adjusting cylindrical member against the operation of the urging member.
7. A stilet according to claim 1 wherein the coil spring includes a guide member coaxially attached to said one end thereof and having a curved surface, said one end of said retracting wire being connected to said guide member.
8. A stilet according to claim 7 wherein said curved surface of said guide member is at the forward edge of said stilet.
9. A stilet according to claim 1 wherein said coil spring is adapted to extend along the whole length of the flexible tube of the endoscope.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US616672 *||Dec 30, 1897||Dec 27, 1898||kelling|
|US944830 *||Jun 2, 1909||Dec 28, 1909||Martin Sussmann||Gastroscope.|
|US3572325 *||Oct 25, 1968||Mar 23, 1971||Us Health Education & Welfare||Flexible endoscope having fluid conduits and control|
|CH120378A *||Title not available|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4043323 *||Dec 23, 1975||Aug 23, 1977||Olympus Optical Co., Ltd.||Medical instrument attached to an endoscope|
|US4329980 *||Feb 25, 1980||May 18, 1982||Olympus Optical Co., Ltd.||Flexible sheath for an endoscope|
|US4586923 *||Jun 25, 1984||May 6, 1986||Cordis Corporation||Curving tip catheter|
|US4732163 *||Nov 10, 1986||Mar 22, 1988||Sarcem S.A.||Remote controlled guide for a catheter|
|US4742817 *||Apr 23, 1986||May 10, 1988||Olympus Optical Co., Ltd.||Endoscopic apparatus having a bendable insertion section|
|US4765331 *||Feb 10, 1987||Aug 23, 1988||Circon Corporation||Electrosurgical device with treatment arc of less than 360 degrees|
|US4787399 *||Jul 1, 1987||Nov 29, 1988||Sarcem S.A.||Remote controlled catheter guide|
|US4799496 *||Jun 3, 1987||Jan 24, 1989||Lake Region Manufacturing Company, Inc.||Guide wire handle|
|US4834709 *||Jan 19, 1988||May 30, 1989||Sherwood Medical Company||Preformable catheter|
|US4928669 *||Jun 26, 1989||May 29, 1990||Sullivan Michael J||Straightening device for flexible tubular structures|
|US5047018 *||Aug 14, 1989||Sep 10, 1991||Minnesota Mining And Manufacturing Company||Catheter and stylet assembly having dual position stylet|
|US5058577 *||May 9, 1989||Oct 22, 1991||Gary Six||Flexible tip stylet for use with an endotracheal intubation device|
|US5163912 *||Jul 11, 1991||Nov 17, 1992||Minnesota Mining And Manufacturing Company||Catheter and stylet assembly having dual position stylet|
|US5190050 *||Nov 8, 1991||Mar 2, 1993||Electro-Catheter Corporation||Tip deflectable steerable catheter|
|US5197457 *||Feb 4, 1992||Mar 30, 1993||Adair Edwin Lloyd||Deformable and removable sheath for optical catheter|
|US5259377 *||Mar 30, 1992||Nov 9, 1993||Stephen M. Daugherty||Endotracheal tube stylet|
|US5401244 *||Apr 28, 1994||Mar 28, 1995||Minnesota Mining And Manufacturing Company||Method of, and stylet apparatus for, installing a retrograde coronary cannula|
|US5562619 *||Oct 19, 1993||Oct 8, 1996||Boston Scientific Corporation||Deflectable catheter|
|US5571085 *||Mar 24, 1995||Nov 5, 1996||Electro-Catheter Corporation||Steerable open lumen catheter|
|US5733245 *||Dec 10, 1996||Mar 31, 1998||Fuji Photo Optical Co., Ltd.||Endoscope provided with curved portion protecting mechanism|
|US5762615 *||Jun 4, 1996||Jun 9, 1998||Cordis Corporation||Guideware having a distal tip with variable flexibility|
|US5807326 *||Mar 6, 1995||Sep 15, 1998||Minnesota Mining And Manufacturing Company||Retrograde coronary sinus catheter|
|US5865800 *||Oct 8, 1996||Feb 2, 1999||Boston Scientific Corporation||Deflectable catheter|
|US6572538 *||Jul 18, 2001||Jun 3, 2003||Olympus Optical Co., Ltd.||Flexible endoscope|
|US6689052 *||Jun 26, 2001||Feb 10, 2004||Olympus Corporation||Endoscope characterized by soft section thereof through which built-in components lie|
|US6763831 *||Aug 2, 2001||Jul 20, 2004||Joseph A. Sniadach||Adjustable ventilation mask for a patient|
|US7785317||Mar 29, 2006||Aug 31, 2010||Codman & Shurtleff, Inc.||Joined metal tubing and method of manufacture|
|US7867176||Jan 11, 2011||Cordis Corporation||Variable stiffness guidewire|
|US8070759||May 30, 2008||Dec 6, 2011||Ethicon Endo-Surgery, Inc.||Surgical fastening device|
|US8075572||Apr 26, 2007||Dec 13, 2011||Ethicon Endo-Surgery, Inc.||Surgical suturing apparatus|
|US8114072||May 30, 2008||Feb 14, 2012||Ethicon Endo-Surgery, Inc.||Electrical ablation device|
|US8114119||Sep 9, 2008||Feb 14, 2012||Ethicon Endo-Surgery, Inc.||Surgical grasping device|
|US8157834||Apr 17, 2012||Ethicon Endo-Surgery, Inc.||Rotational coupling device for surgical instrument with flexible actuators|
|US8172772||May 8, 2012||Ethicon Endo-Surgery, Inc.||Specimen retrieval device|
|US8211125||Aug 15, 2008||Jul 3, 2012||Ethicon Endo-Surgery, Inc.||Sterile appliance delivery device for endoscopic procedures|
|US8241204||Aug 29, 2008||Aug 14, 2012||Ethicon Endo-Surgery, Inc.||Articulating end cap|
|US8252057||Jan 30, 2009||Aug 28, 2012||Ethicon Endo-Surgery, Inc.||Surgical access device|
|US8262563||Jul 14, 2008||Sep 11, 2012||Ethicon Endo-Surgery, Inc.||Endoscopic translumenal articulatable steerable overtube|
|US8262655||Nov 21, 2007||Sep 11, 2012||Ethicon Endo-Surgery, Inc.||Bipolar forceps|
|US8262680||Sep 11, 2012||Ethicon Endo-Surgery, Inc.||Anastomotic device|
|US8317806||Nov 27, 2012||Ethicon Endo-Surgery, Inc.||Endoscopic suturing tension controlling and indication devices|
|US8337394||Oct 1, 2008||Dec 25, 2012||Ethicon Endo-Surgery, Inc.||Overtube with expandable tip|
|US8353487||Dec 17, 2009||Jan 15, 2013||Ethicon Endo-Surgery, Inc.||User interface support devices for endoscopic surgical instruments|
|US8361112||Jun 27, 2008||Jan 29, 2013||Ethicon Endo-Surgery, Inc.||Surgical suture arrangement|
|US8403926||Mar 26, 2013||Ethicon Endo-Surgery, Inc.||Manually articulating devices|
|US8409200||Apr 2, 2013||Ethicon Endo-Surgery, Inc.||Surgical grasping device|
|US8425505||Apr 23, 2013||Ethicon Endo-Surgery, Inc.||Electroporation ablation apparatus, system, and method|
|US8449538||Jan 27, 2010||May 28, 2013||Ethicon Endo-Surgery, Inc.||Electroporation ablation apparatus, system, and method|
|US8480657||Oct 31, 2007||Jul 9, 2013||Ethicon Endo-Surgery, Inc.||Detachable distal overtube section and methods for forming a sealable opening in the wall of an organ|
|US8480689||Sep 2, 2008||Jul 9, 2013||Ethicon Endo-Surgery, Inc.||Suturing device|
|US8496574||Dec 17, 2009||Jul 30, 2013||Ethicon Endo-Surgery, Inc.||Selectively positionable camera for surgical guide tube assembly|
|US8505531||May 15, 2007||Aug 13, 2013||Truphatek International Ltd.||Hand operated articulated intubation stylet|
|US8506564||Dec 18, 2009||Aug 13, 2013||Ethicon Endo-Surgery, Inc.||Surgical instrument comprising an electrode|
|US8529563||Aug 25, 2008||Sep 10, 2013||Ethicon Endo-Surgery, Inc.||Electrical ablation devices|
|US8568410||Apr 25, 2008||Oct 29, 2013||Ethicon Endo-Surgery, Inc.||Electrical ablation surgical instruments|
|US8579897||Nov 21, 2007||Nov 12, 2013||Ethicon Endo-Surgery, Inc.||Bipolar forceps|
|US8608652||Nov 5, 2009||Dec 17, 2013||Ethicon Endo-Surgery, Inc.||Vaginal entry surgical devices, kit, system, and method|
|US8652150||May 30, 2008||Feb 18, 2014||Ethicon Endo-Surgery, Inc.||Multifunction surgical device|
|US8679003||May 30, 2008||Mar 25, 2014||Ethicon Endo-Surgery, Inc.||Surgical device and endoscope including same|
|US8771260||May 30, 2008||Jul 8, 2014||Ethicon Endo-Surgery, Inc.||Actuating and articulating surgical device|
|US8828031||Jan 12, 2009||Sep 9, 2014||Ethicon Endo-Surgery, Inc.||Apparatus for forming an anastomosis|
|US8888792||Jul 14, 2008||Nov 18, 2014||Ethicon Endo-Surgery, Inc.||Tissue apposition clip application devices and methods|
|US8906035||Jun 4, 2008||Dec 9, 2014||Ethicon Endo-Surgery, Inc.||Endoscopic drop off bag|
|US8939897||Feb 4, 2011||Jan 27, 2015||Ethicon Endo-Surgery, Inc.||Methods for closing a gastrotomy|
|US8986199||Feb 17, 2012||Mar 24, 2015||Ethicon Endo-Surgery, Inc.||Apparatus and methods for cleaning the lens of an endoscope|
|US9005198||Jan 29, 2010||Apr 14, 2015||Ethicon Endo-Surgery, Inc.||Surgical instrument comprising an electrode|
|US9011431||Sep 4, 2012||Apr 21, 2015||Ethicon Endo-Surgery, Inc.||Electrical ablation devices|
|US9028483||Dec 18, 2009||May 12, 2015||Ethicon Endo-Surgery, Inc.||Surgical instrument comprising an electrode|
|US9049987||Mar 15, 2012||Jun 9, 2015||Ethicon Endo-Surgery, Inc.||Hand held surgical device for manipulating an internal magnet assembly within a patient|
|US9078662||Jul 3, 2012||Jul 14, 2015||Ethicon Endo-Surgery, Inc.||Endoscopic cap electrode and method for using the same|
|US9220526||Mar 20, 2012||Dec 29, 2015||Ethicon Endo-Surgery, Inc.||Rotational coupling device for surgical instrument with flexible actuators|
|US9226772||Jan 30, 2009||Jan 5, 2016||Ethicon Endo-Surgery, Inc.||Surgical device|
|US9233241||Jan 18, 2012||Jan 12, 2016||Ethicon Endo-Surgery, Inc.||Electrical ablation devices and methods|
|US9254169||Feb 28, 2011||Feb 9, 2016||Ethicon Endo-Surgery, Inc.||Electrical ablation devices and methods|
|US9277957||Aug 15, 2012||Mar 8, 2016||Ethicon Endo-Surgery, Inc.||Electrosurgical devices and methods|
|US9314620||Feb 28, 2011||Apr 19, 2016||Ethicon Endo-Surgery, Inc.||Electrical ablation devices and methods|
|US20040210245 *||Jul 25, 2003||Oct 21, 2004||John Erickson||Bendable needle with removable stylet|
|US20070149951 *||Dec 27, 2005||Jun 28, 2007||Mina Wu||Variable stiffness guidewire|
|US20070233039 *||Mar 29, 2006||Oct 4, 2007||Vladimir Mitelberg||Joined metal tubing and method of manufacture|
|US20080262300 *||May 18, 2007||Oct 23, 2008||Usgi Medical, Inc.||Endoscopic system with disposable sheath|
|US20100108060 *||May 15, 2007||May 6, 2010||Truphatek International Ltd||Hand operated articulated intubation stylet|
|USRE35595 *||Oct 21, 1993||Aug 26, 1997||Six; Gary||Flexible tip stylet for use with an endotracheal intubation device|
|WO2011075509A1||Dec 15, 2010||Jun 23, 2011||Wilson-Cook Medical Inc.||Endoscope cap with ramp|
|WO2011075510A2||Dec 15, 2010||Jun 23, 2011||Wilson-Cook Medical Inc.||Advancing system and method of use thereof|
|WO2011075512A2||Dec 15, 2010||Jun 23, 2011||Wilson-Cook Medical Inc.||Endoscope sheath|
|U.S. Classification||600/104, 128/207.14, 600/144|
|International Classification||A61B1/012, A61B1/31, A61B1/273, A61B1/018|
|Cooperative Classification||A61B1/018, A61B1/2736, A61B1/31|
|European Classification||A61B1/018, A61B1/273D, A61B1/31|