Source: http://www.google.es/patents/US5993474
Timestamp: 2017-08-24 07:02:56
Document Index: 341304869

Matched Legal Cases: ['art.\n3', 'art.\n4', 'art.\n14', 'art 210', 'art 220', 'arts 10']

Patente US5993474 - Treatment accessory for endoscope - Google Patentes
A treatment unit for an endoscope, for example, a grasping unit is connected at a distal end of a manipulation wire that is connected to a first manipulation member. An inner tube slidably surrounds the manipulation wire. A proximal end of the inner tube is connected to a distal end of a second manipulation...http://www.google.es/patents/US5993474?utm_source=gb-gplus-sharePatente US5993474 - Treatment accessory for endoscope
Número de publicación US5993474 A
Número de solicitud US 08/872,169
También publicado como EP0813842A2, EP0813842A3
Número de publicación 08872169, 872169, US 5993474 A, US 5993474A, US-A-5993474, US5993474 A, US5993474A
Inventores Teruo Ouchi
Citas de patentes (8), Otras citas (2), Citada por (182), Clasificaciones (19), Eventos legales (7)
US 5993474 A
A treatment unit for an endoscope, for example, a grasping unit is connected at a distal end of a manipulation wire that is connected to a first manipulation member. An inner tube slidably surrounds the manipulation wire. A proximal end of the inner tube is connected to a distal end of a second manipulation member. Further, an outer tube is provided to surround the inner tube and the manipulation wire. A proximal end of the outer tube is connected to a main body connected to the first manipulation a member by a connecting rod that the positional relationship between the manipulation wire and the outer tube along the axis is fixed. By moving the first and second manipulation members towards each other, the grasping unit is opened as the inner tube slides to uncover a part of the grasping unit which opens by resilience, while when the first and second manipulation members are spaced from each other, the inner tube slides to cover a part of the grasping unit forcing it closed.
1. A treatment accessory for use with an endoscope, said treatment accessory having a proximal end nearest the user and a distal end remote from a user, and said treatment accessory comprising:
a treatment unit having a closed state and an open state, and biased to be in the open state;
an outer tube coaxially positioned with respect to said inner tube and extending beyond a distal end of said inner tube when said treatment unit is in said open state;
a manipulation wire slidably positioned within said inner tube, a distal end of said manipulation wire attached to said treatment unit, and said distal end of said manipulation wire being substantially at said distal end of said inner tube when said treatment unit is in said open state;
a first manipulation part including a first grasping portion by which said treatment accessory is held, said first manipulation part connected to a proximal end of said manipulation wire;
a second manipulation part including a second grasping portion by which said treatment accessory is held, said second manipulation part connected to a proximal end of said inner tube;
a main body connected to a proximal end of said outer tube;
a single connecting rod that connects said first manipulation part and said main body, said connecting rod being spaced from and parallel to an axis of said manipulation wire, exposing a proximal end of said inner tube and said manipulation wire for cleaning access in a circumferential range only excepting said connecting rod, said connecting rod and said manipulation wire being positioned on either side of an axial center line of said first grasping portion and said second grasping portion, said manipulation wire being surrounded by a rigid member for preventing buckling of said manipulation wire when said first grasping portion is operated along said axial center line;
a fixing device that engages said first manipulation part and at least one of said connecting rod and said manipulating wire, said fixing device enabling attachment and detachment of said at least one of said connecting rod and said manipulation wire to and from said first manipulation part;
wherein said second manipulation part is slidable along said connecting rod toward said main body, and wherein said first manipulation part, said main body, said manipulation wire, and said outer tube are interconnected so that when said first and second grasping portions are separated, said inner tube extends relative to said manipulating wire and said outer tube so that said inner tube closes said treatment accessory.
2. The treatment accessory according to claim 1, wherein said connecting rod is detachable from one of said first manipulation part and said second manipulation part.
3. The treatment accessory according to claim 1, wherein said manipulation wire is detachable from said first manipulation part.
4. The treatment accessory according to claim 1, wherein said treatment unit is formed to resiliently open.
5. The treatment accessory according to claim 4, wherein said treatment unit is closed when said inner tube slides to cover a portion of said treatment unit adjacent to said distal end of said manipulation wire.
6. The treatment accessory according to claim 1, said instrument unit comprising a grasping collecting unit.
7. The treatment accessory according to claim 1, said instrument unit comprising a basket-type collecting unit, said basket-type collecting unit including a plurality of flexible wires connected to each other at both ends.
8. The treatment accessory according to claim 1, said instrument unit comprising a snare unit, said snare unit comprising at least one flexible wire formed into a loop.
9. The treatment accessory according to claim 8, said snare unit comprising a high-frequency snare unit.
10. The treatment accessory according to claim 1, said fixing device comprising a screw extending transverse to said axis of said manipulating wire.
11. The treatment accessory according to claim 1, said fixing device detachably attaching said first manipulation part and said connecting rod.
12. The treatment accessory according to claim 1, said fixing device detachably attaching said first manipulation part and said manipulating wire.
13. The treatment accessory according to claim 1, said fixing device comprising screw members detachably attaching said at least one of said connecting rod and said manipulating wire to said first manipulation part.
14. The treatment accessory according to claim 1, said connecting rod having a threaded portion that is threadedly engaged with a hole provided on said main body.
15. The treatment accessory according to claim 1, said second manipulation part including a hole extending through said second manipulation part, said hole being substantially coaxial with the axis of said manipulation wire, said manipulation wire extending through said hole, at least a portion of said manipulation wire covered by said rigid member passing through said second manipulation part when said second manipulation part slides along said connecting rod.
However, in the material collecting accessory disclosed in the Japanese Utility Model Publication No. HEI-2-39445 the manipulation unit is designed such that the operation to close the instrument is performed by an operator opening a hand (i.e., separating the thumb and fingers). With such an arrangement, it is difficult to apply sufficient force and is difficult to perform fine or urgent manipulation since the opening/closing movement of the hand is opposite to the opening/closing movement of the instrument.
According to one aspect of the invention, a treatment accessory for an endoscope comprises an instrument unit having an open state and a closed state, the instrument unit being neutrally in the open state by a resilient force thereof. A first manipulation part is provided, and a second manipulation part is movable in relation to the first manipulation part. A flexible outer tube includes a proximal end where is connected to the second manipulation part. A flexible outer tube is inserted in an instrument channel of the endoscope when in use A, a proximal end of a manipulation wire is fixed in position with respect to the outer tube, a distal end of the manipulation being connected to the instrument unit. A flexible inner tube is slidably inserted in the flexible outer tube, the flexible inner tube slidably surrounding the manipulation wire. A proximal end of the flexible inner tube is connected to the first manipulation part, wherein, when the first manipulation part is located at a position closest to the second manipulation part, the flexible inner tube surrounds the portion of the instrument unit adjacent to the distal end of the manipulation wire to close the instrument unit, and when the first manipulation part is located at a position farthest from the second manipulation part, the flexible inner tube does not cover the portion of the instrument unit adjacent to the distal end of the manipulation wire and the instrument unit is open by resilience.
Further optionally, the instrument unit may be basket-type collecting unit, the basket-type collecting unit comprising a plurality of flexible wires connected at both ends.
Alternatively, the instrument unit may be a snare unit, the snare unit comprising at least one flexible wire formed into a loop. In this case, the snare unit may be a highfrequency snare unit.
According to another aspect of the invention, a treatment accessory for an endoscope comprises a treatment unit end; an inner tube. An outer tube is coaxially provided around the inner tube and, a manipulation wire is slidably inserted in the inner tube. A distal end of the manipulation wire is attached to the treatment unit, and a first manipulation part is connected to a proximal end of the manipulation wire. A second manipulation part is connected to a proximal end of the inner tube, and a main body is connected to a proximal end of the outer tube. A connecting member connects the first manipulation part and the main body, the connecting member being displaced from and parallel to an axis of the manipulating wire, wherein the second manipulation part is slidable along the connecting member.
With the treatment accessory according to this aspect, since the first manipulation part and the second manipulation part are connected by the connecting member that is not coaxial with the manipulation wire, the manipulation wire and the first and second manipulation parts can be quickly and easily washed after each use.
Optionally, the connecting member may be detachable from one of the first manipulation part and the second manipulation part. Further optionally, the manipulation wire may be detachable from the first manipulation part. In this way, the manipulation wire, inner tube, and outer tube can be easily disassembled and washed and disinfected individually.
According to a further aspect of the invention, a basket accessory for endoscope includes: a basket-type collecting unit having a plurality of flexible wires connected at both ends, a first manipulation part and second manipulation. The first manipulation part is movable in relation to the second manipulation part. A proximal end of a flexible outer tube is connected to the second manipulation part, the flexible outer tube being inserted in an instrument channel of the endoscope when in use. A proximal end of a manipulation wire is fixed in position with respect to the outer tube, a distal end of the manipulation wire being connected to the basket-type collecting unit. A flexible inner tube is slidably inserted in the flexible outer tube, the flexible inner tube slidably surrounding the manipulation A proximal end of the flexible inner tube is connected to the first manipulation part, wherein the basket-type collecting unit is neutrally open due to resilience, and wherein, when a distal end portion the flexible inner tube is slides to cover a portion of the basket-type collecting unit adjacent to the distal end of the manipulation wire, the basket-type collecting unit is closed.
According to a still further aspect of the invention, a snare accessory for an endoscope includes a snare unit having a plurality of flexible wires connected at both ends, a first manipulation part, and second manipulation part. The first manipulation part is movable in relation to the second manipulation part. A proximal end of a flexible outer tube is connected to the second manipulation part, the flexible outer tube being inserted in an instrument channel of the endoscope when in use. A proximal end of a manipulation wire is fixed in position with respect to the outer tube, a distal end of the manipulation wire being connected to the snare unit flexible inner tube is slidably inserted in the flexible outer tube, the flexible inner tube slidably surrounding the manipulation wire. A proximal end of the flexible inner tube is connected to the first manipulation part, wherein the snare unit is neutrally open due to resilience, and wherein, when a distal end portion of the flexible inner tube slides to cover a portion of the snare unit adjacent to the distal end of the manipulation wire, the snare unit is closed.
An outer peripheral surface of the slider barrel 22 is provided with gripping flanges 23 which define a grasping area 24 that is held by an operator during operation of the material collecting accessory 100. The grasping area 24 is, e.g., a second grasping portion held by an operator the accessory, as shown in FIGS. 4 and 5.
With the material collecting accessory 100, since the grasping unit 5 does not move in the axial direction during closing, the material can be securely grasped. Further, since the operations of closing and opening the grasping unit 5 are performed by corresponding movements of the operator's hand, that is, by closing and opening the hand, respectively, the operator may apply a stronger force to close the grasping unit 5 and more accurately control the operation of the grasping unit 5.
The manipulation wire 33 passes through the through hole 221 between the body 211 and the support 212 and is provided with a fixing block 203 that is embedded in the support 212. Also, as shown in FIG. 8, the manipulation wire 33 is further provided with a rigid member 207, such as a stainless steel pipe or the like, that covers the manipulation wire 33 from the support 212 to slightly inside the entrance to the inner tube 32 in order to prevent the manipulation wire 33 from buckling during operation of the collecting accessory 200.
The operation of the material collecting accessory 200 is now described with reference to FIGS. 10 and 11. FIGS. 10 and 11 illustrate states in which an operator has, respectively, opened and closed the grasping unit 5 by operation of the first manipulation part 210 and the second manipulation part 220. In this example, the operator has engaged a thumb with the support 212 and two fingers with the grasping area 224, although other arrangements are also possible.
Once inside a human body, the basket-type collecting unit 500 is opened and the outer tube 31 is positioned so that some material M is positioned inside the opened basket-type collecting unit 500 (as shown in FIG. 15). At this point, the outer tube 31 is fixed in position by a forceps plug, clamp, or the like (not shown) provided at a proximal end of the endoscope so that an operator can then accurately operate the first and second manipulation parts 10, 20. The operator then slides the inner tube 32 over the basket-type collecting unit 500 and close the basket-type collecting unit 500 (as shown in FIG. 16). In this operation, since the outer tube 31 is fixed in the axial direction, the basket-type collecting unit 500 remains fixed in the axial direction while being closed by the sliding of the inner tube 32, and thus, the material M is less likely to fall out of or be dislodged from the basket-type collecting unit 500. Thus, the material M can be collected securely and removed from the human body by drawing out either the material collecting accessory 100 or the endoscope.
JPH0239445A * Título no disponible
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2 * Gastrointestinal Endoscopy , Martin B. Grossman, M.D., Clinical Symposia , vol. 32, No. 3, CIBA Pharmaceutical Company, Summit, New Jersey, 1980.
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Clasificación de EE.UU. 606/206, 606/113, 606/127
Clasificación internacional A61B17/22, A61B17/30, A61B17/28, A61B18/14
Clasificación cooperativa A61B17/29, A61B17/221, A61B2018/1407, A61B17/30, A61B17/2909, A61B2017/2215, A61B2017/301, A61B2017/2932, A61B2017/2212, A61B2017/2905
Clasificación europea A61B17/29, A61B17/221
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:OUCHI, TERUO;REEL/FRAME:008605/0408