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WO2009050690A1 - Tête optique pour endoscope - Google Patents

Tête optique pour endoscope Download PDF

Info

Publication number
WO2009050690A1
WO2009050690A1 PCT/IL2008/001181 IL2008001181W WO2009050690A1 WO 2009050690 A1 WO2009050690 A1 WO 2009050690A1 IL 2008001181 W IL2008001181 W IL 2008001181W WO 2009050690 A1 WO2009050690 A1 WO 2009050690A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical head
illuminating means
front member
recess
head according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IL2008/001181
Other languages
English (en)
Inventor
Amram Aizenfeld
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stryker GI Ltd
Original Assignee
Stryker GI Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stryker GI Ltd filed Critical Stryker GI Ltd
Publication of WO2009050690A1 publication Critical patent/WO2009050690A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00096—Optical elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00101—Insertion part of the endoscope body characterised by distal tip features the distal tip features being detachable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0661—Endoscope light sources
    • A61B1/0676—Endoscope light sources at distal tip of an endoscope
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0661—Endoscope light sources
    • A61B1/0684—Endoscope light sources using light emitting diodes [LED]

Definitions

  • the present invention relates generally to the field of endoscopy and specifically to an optical head for use with an endoscope. More particularly, the present invention refers to a front member for retaining illuminating means for the optical head used in the endoscope.
  • WO 2006/025058 discloses an optical head for an endoscope, fitted with an imaging system comprising a solid state imaging sensor and with an illuminating system comprising illuminating means, e.g. LED's. At least one illuminating means is defined by a parameter, which value is different from the value of the same parameter of the rest of the illuminating means. Among the parameters are luminous intensity, luminous intensity distribution angle and direction of the longitudinal axis of the illuminating means.
  • WO 2007/029230 discloses a cap, which is detachably connectable to an optical head of an endoscope.
  • the cap has a tubular housing, which is manufactured by injection molding from translucent plastic material.
  • the housing includes a rear open end and a frontal end closed by a frontal face and an antiglare ring is embedded in the frontal face for preventing objective lens from viewing parasitic reflections.
  • the antiglare ring the optical head can view an object of interest through a portion of the frontal face which is confined by the antiglare ring.
  • the antiglare ring is provided with at least one discontinuity region through which the plastic material can flow during injection molding of the cap.
  • an optical head for an endoscope comprising a body member for retaining at least a part of components of the optical head, and a front member for retaining illuminating means, said front member being detachably attachable to said body member, said front member comprising a front surface, a rear surface, an aperture for a lens, and at least one recess formed in the front member for deployment therein of said illuminating means.
  • the recess is defined by a side and bottom recess surfaces.
  • the optical head further comprises a bridge for retaining said illuminating means, said bridge being adapted for locating within said recess with said illuminating means retained thereby, and said bridge being adapted to prevent electrical contact between the illuminating means and the front member.
  • the bridge may be further adapted to absorb and dissipate heat from the illuminating means.
  • the bridge may be further made of an electrically insulating material.
  • the front member may further comprise at least one passage extending therealong for allowing passage therethrough of electrical cables to provide electrical connection of the illuminating means to a source of electrical energy.
  • the recess may be further closed by a transparent window.
  • a region of the window may be coated by a non-transparent coating to prevent light from the illuminating means to enter the aperture.
  • the illuminating means may be LED.
  • the front member may comprise at least two recesses, disposed at two opposite sides with respect to said aperture, each recess being adapted for deployment therein said illuminating means.
  • the illuminating means may comprise a group of LEDs.
  • the optical head may further be covered by a disposable detachably mounted thereon so as to cover said front member and at least a portion of the body member.
  • the present invention enables deployment of the illuminating means within the optical head in such a manner that easy access is provided when repair or replacement of the LEDs is required. At the same time convenient and fast assembling of the optical head is possible during manufacturing thereof.
  • a front member for retaining illuminating means of an optical head of an endoscope said front member being detachably attachable to a body member of said optical head, the front member comprises a front surface, a rear surface, an aperture for a lens, and at least one recess formed in the front member for deployment therein of said illuminating means.
  • an endoscope having an optical head comprising a main body for retaining at least a part of components of the optical head, and a front member for retaining illuminating means, said front member being detachably attachable to said body member, said front member comprising a front surface, a rear surface, an aperture for a lens, and at least one recess formed in the front member for deployment therein of said illuminating means.
  • a method of manufacturing of an optical head for an endoscope the method comprising:
  • a front member for retaining illuminating means, said front member comprising a front surface, a rear surface, an aperture for a lens, and at least one recess formed in the front member;
  • Fig. 1 is an isometric exploded view of an optical head according to the present invention
  • Fig. 2 is an isometric view of a LED unit according to the present invention
  • Fig. 3 is an isometric view of a bridge according to the present invention. - A -
  • Fig. 4 is an isometric view of the LED unit, shown in Fig. 2 when it is carried by the bridge shown in Fig. 3;
  • Fig. 5 is a back isometric view of the LED unit with features shown in Fig.4;
  • Figs. 6A and 6B illustrate a front and a back isometric view, respectively, of a front member according to the present invention
  • Figs. 7A and 7B illustrate an insometric and a top view, respectively, of the front member shown in Figs. 6A and 6B, together with the bridge and the LED unit.
  • Fig. 8 is an isometric view of a window employed in the optical head according to the present invention.
  • Fig. 9 A is an isometric view of the optical head according to the present invention.
  • Fig. 9B is a top view of the optical head shown in Fig. 9 A.
  • Fig. 9C is an isometric view of a cross-section of the optical head shown in Figs. 9A and 9B.
  • Fig. 1 schematically illustrates one example of an optical head 10 according to the present invention, for use with an endoscope apparatus.
  • the optical head 10 comprises two main members: a body member 11 and a front member 21.
  • the body member 1 1 is responsible for accommodating at least some of components of the optical head 10, namely a lens 100, a lens holder 101, an image sensor 103 with electrical connectors 105, essentially in the same manner as this is done in an conventional optical head.
  • the front member 21 is adapted for retaining at least one LED unit 41, in a manner which will be further described in detail.
  • the LED unit 41 may be of any appropriate conventional design.
  • Fig. 2 illustrates one such conventional LED unit.
  • the LED unit is configured as a box-like housing with LEDs contained therein (not seen), a LED unit top surface 40, a LED unit bottom surface 42, and two pairs of opposite LED unit side surfaces 44a and 44b.
  • the LED unit shown in Fig. 2 contains a pair of LEDs.
  • the LED unit 41 further has two transparent windows 48 on the top surface 40, to transmit therethrough light emitted by the LEDs residing in the unit.
  • the LED unit 41 further comprises two pairs of electrical contacts 45 associated with respective LED's. The contacts are provided at the areas of merger between the LED unit bottom surface 42 and the LED unit side surfaces 44b.
  • Each contact has a bottom portion 45a (shown in Fig. 5) and a side portion 45b, and the contacts of each pair are spaced from each other by a distance X and all contacts have a thickness Tc.
  • the contacts 45 are intended for electrical connection with electrical cables (not shown) providing power to the LED's.
  • the LED units 41 provided in the optical head 10 are retained therein by a dedicated LED supporting arrangement further explained with reference to Fig. 3.
  • the LED supporting arrangement is located within a dedicated recess made in the front member 21 as will be further explained with reference to Fig. ⁇ A.
  • the LED unit supporting arrangement is configured as a cross-shaped bridge 31 comprising a bridge base 33, a bridge bottom 35 (seen in Fig. 5) and two pairs of crossing ribs 37 and 39 defining together a LED unit receiving area 32 that is configured and dimensioned to suit the dimension and configuration of the box- like housing of the LED unit 41.
  • the bridge may be made of any rigid material, e.g. aluminum.
  • Each rib 37 has a couple of opposite planar inner walls 37a and outer radiused walls 37b.
  • Each rib 39 has an rectangular cross-section and is defined by a couple of opposite planar inner walls 39a, by a couple of planar outer walls 39b and by a couple of recesses 39c to allow the LED connecting cables (not shown) to pass through.
  • Each rib 39 has a thickness T R .
  • Figs. 4 and 5 show the bridge 31 together with the LED unit 41 snuggly fitted therein so that the LED unit bottom surface 42 faces the bridge base 33, the LED unit side surfaces 44a are respectively juxtaposed to the opposite inner walls 37a of the rib 37, and the side surfaces 44b are respectively juxtaposed to the opposite inner walls 39a ofthe rib 39.
  • Figs. 6A and 6B show the front member 21 when the LED units 41 are not yet deployed therein.
  • the front member 21 has a U-shape and comprises a front surface 23, a rear surface 25 and a side surface 24 extending therebetween and defining a depth dimension D of the front member 21.
  • the front member 21 is further provided with an aperture 27 extending therealong and with two recesses 29 made in the front surface 23 and disposed at two opposite sides with respect to the aperture 27.
  • the configuration and location of recesses 29 on the front surface is selected in such a manner that their longitudinal and widthwise dimensions R 1 and R 2 are at maximum achieved for the available U-shape configuration of the front member 21.
  • Each recess 29 is configured and dimensioned for receiving therein one LED unit 41 carried by its bridge 31.
  • the each recess 29 thus has a recess base surface having stepped configuration and comprising several base surface portions as follows: a front base surface portion 20a, an intermediate base surface portion 20b and a rear base surface portion 20c.
  • the each recess 29 further has a recess side surface comprising corresponding side surface portions: a front side surface portion 22a, intermediate side surface portions 22b' and 22b", and a rear side surface portion 22c.
  • Each recess 29 has a depth which is slightly less than the depth D of the front member 21.
  • the depth of the recess is a total of heights of the side surface portions 22a, 22b 1 and 22b".
  • the front member 21 further comprises a couple of bottom through openings 26 extending between the rear surface 25 thereof and the rear base surface portion 20c of each recess.
  • the openings are intended for passing therethrough electrical cables extending from the contacts of the LED units 41 (when it is located in the recess).
  • the front member is provided also with a side through opening 28, disposed on the side surface 24 of the front member 21. This opening is intended for a locking screw which secures the lens in place.
  • Figs. 7A and 7B it will be explained how the LED unit 41 carried by the bridge 31 is deployed within the recess 29.
  • the bridge 31 is placed on the middle recess surface 20b, so that the supporting radiused surfaces 37b of the rib 37 fit into the corresponding middle side surfaces 22b of the recess and the supporting planar surfaces of the rib 39 contact with the middle side surfaces 22b 1 of the recess.
  • the bridge outer walls 37b, 39b prevent the lateral walls 44a, 44b of the LED unit 41 from touching the side surfaces 22b"of the recess made in the front member 21.
  • the thickness T R of the ribs 39 is greater than the thickness Tc of the contacts 45, a direct contact between the front member 21 and the contacts 45 is also prevented.
  • each window 81 is configured and dimensioned to suit the shape and size of the top recess surface 20a and it is secured in place by gluing.
  • a portion of each window 81 is coated by a non-transparent coating defined by dimensions W 1 and W 2 . The purpose of the coating is to prevent entering of light laterally from the illuminating means into aperture 27
  • the body member 11 of the optical head which is configured as a single tubular part, comprising a rear end 13, a middle section 15 and a frontal end 17.
  • the body member 11 is formed with a U-like depression 12 extending through the middle section 15 and the frontal end 17, and accordingly a corresponding U-like hollow space 14 is provided in the body member.
  • the U-like depression is intended for passing therethrough of a multilumen (not shown) as explained in already mentioned patent application WO 2006/025058.
  • the hollow space is intended for accommodating of optical components of the optical head.
  • the body member 11 further is provided with a tongue 18 for snapping connection with a disposable cap (not shown).
  • the body member 11 and the disposable cap may have any appropriate design and, for example, may have structures as disclosed in the WO 2006/025058 and WO 2007/029230, whose description from these publications is incorporated herein by reference.
  • Figs. 6A,9A,9C show the optical head 10 according to the present invention.
  • the two bridges 31 carrying the respective LED units 41 are received into respective recesses 29 of the front member 21.
  • the bridges 31 prevent electrical contact between the LED units 41 and the front member 21 and in operation, absorb and dissipate heat produced by the LEDs.
  • the bridges 31 prevent the LED units 41 from displacement, as the LEDs are tightly fitted within the bridges and the bridges are tightly fitted within appropriate recesses of the front member, as previously described.
  • the LEDs are electrically connected to the LED connecting cables which extend through the bottom openings 26 of the recesses 29 into the body member 21.
  • a lens holder 101 is provided which together with the lens 100 is insertable into the front member 21 in a direction shown by an arrow A 2 (Figs. 1 and
  • the lens 100 is secured by a screw (not shown) passing through the side opening 28 made in the front member 21.
  • the front member 21, together with the bridges 31 carrying the LED units 41, is inserted into the U-like hollow space 14 provided in the body member 11.
  • the front member is secured in place by gluing.
  • the recesses are covered by windows, as previously described, thereby preventing the LED units from exiting the recesses 29.
  • the dimensions W 1 and W 2 of the coated regions 83 of the windows are determined from one side to prevent lateral entrance of light to the aperture 27 and on the other side to ensure maximal illumination provided by the LEDs.
  • the room within the recesses 29 is enough to accommodate the bridge 31 with the LED unit 41 and to pass the cables for the LEDs.
  • the front member 21 is disassembled from the body member, the bridge with a defective LED unit is taken out of the recess 29 in a direction opposite to the A 1 direction, and repaired or replaced.
  • the present invention can be employed not only in the colonoscopic apparatus. It can be used in gastroscopic apparatus or in any other endoscopic apparatus.
  • the recesses provided in the front member may have shape which is different from the shape described above.
  • the amount of recesses may be more or less than two.
  • the illuminating means units can be accommodated in the recesses without being carried by bridge structures.
  • the bridge structure has cross-like shape.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biophysics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Radiology & Medical Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Endoscopes (AREA)

Abstract

Cette invention concerne une tête optique pour endoscope. Ladite tête optique comprend un élément formant corps conçu pour retenir au moins une lentille, et un élément avant conçu pour retenir une unité de moyen d'éclairage muni d'un moyen d'éclairage. L'élément avant peut être fixé de manière amovible à l'élément formant corps et il comprend une surface avant, une surface arrière, une ouverture pour la lentille et un renfoncement pour loger l'unité de moyen d'éclairage.
PCT/IL2008/001181 2007-10-14 2008-09-01 Tête optique pour endoscope Ceased WO2009050690A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US97138307P 2007-10-14 2007-10-14
US60/971,383 2007-10-14

Publications (1)

Publication Number Publication Date
WO2009050690A1 true WO2009050690A1 (fr) 2009-04-23

Family

ID=40319809

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL2008/001181 Ceased WO2009050690A1 (fr) 2007-10-14 2008-09-01 Tête optique pour endoscope

Country Status (1)

Country Link
WO (1) WO2009050690A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3047886A1 (fr) * 2016-02-18 2017-08-25 Axess Vision Tech Dispositif medical avec une tete distale a encombrement limite

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050003323A1 (en) * 2003-01-14 2005-01-06 J. Morita Manufacturing Corporation Diagnostic imaging apparatus
US20050119527A1 (en) * 2003-04-01 2005-06-02 Scimed Life Systems, Inc. Force feedback control system for video endoscope
WO2005099376A2 (fr) * 2004-04-06 2005-10-27 Integrated Endoscopy, Inc. Endoscopes et leurs procedes de production
WO2006025058A1 (fr) * 2004-09-03 2006-03-09 Stryker Gi Ltd. Tete optique d'endoscope
WO2007029230A2 (fr) * 2005-09-06 2007-03-15 Stryker Gi Ltd. Bouchon jetable pour endoscope
US20070106119A1 (en) * 2005-06-29 2007-05-10 Yasuo Hirata Endoscope

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050003323A1 (en) * 2003-01-14 2005-01-06 J. Morita Manufacturing Corporation Diagnostic imaging apparatus
US20050119527A1 (en) * 2003-04-01 2005-06-02 Scimed Life Systems, Inc. Force feedback control system for video endoscope
WO2005099376A2 (fr) * 2004-04-06 2005-10-27 Integrated Endoscopy, Inc. Endoscopes et leurs procedes de production
WO2006025058A1 (fr) * 2004-09-03 2006-03-09 Stryker Gi Ltd. Tete optique d'endoscope
US20070106119A1 (en) * 2005-06-29 2007-05-10 Yasuo Hirata Endoscope
WO2007029230A2 (fr) * 2005-09-06 2007-03-15 Stryker Gi Ltd. Bouchon jetable pour endoscope

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3047886A1 (fr) * 2016-02-18 2017-08-25 Axess Vision Tech Dispositif medical avec une tete distale a encombrement limite

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