JP5097429B2 - The tip of the sector scan type ultrasonic endoscope - Google Patents

The tip of the sector scan type ultrasonic endoscope Download PDF

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JP5097429B2
JP5097429B2 JP2007098321A JP2007098321A JP5097429B2 JP 5097429 B2 JP5097429 B2 JP 5097429B2 JP 2007098321 A JP2007098321 A JP 2007098321A JP 2007098321 A JP2007098321 A JP 2007098321A JP 5097429 B2 JP5097429 B2 JP 5097429B2
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JP2008253489A (en
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裕幸 神田
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Description

この発明はセクタスキャン型超音波内視鏡の先端部に関する。   The present invention relates to a distal end portion of a sector scan type ultrasonic endoscope.

セクタスキャン型超音波内視鏡の先端部においては一般に、挿入部の先端に、挿入部の軸線と平行な断面を扇状に走査する超音波プローブが配置されると共に、処置具を超音波走査面に沿って後方から超音波走査領域内に突出させる処置具突出口が設けられており、高い処置能力を得るために処置具突出口を二つ設けたものがある（例えば、特許文献１）。
特開２００４−１５４３００ At the distal end of the sector scan type ultrasonic endoscope, generally, an ultrasonic probe that scans a section parallel to the axis of the insertion portion in a fan shape is disposed at the distal end of the insertion portion, and the treatment tool is placed on the ultrasonic scanning surface. Are provided with two treatment tool protrusions in order to obtain high treatment capability (for example, Patent Document 1).
JP 2004-154300 A

図５は特許文献１に記載された従来のセクタスキャン型超音波内視鏡の先端部を示しており、二つの処置具突出口１１，１２が各々、超音波プローブ１０と軸線位置が合致する状態に配置されている。Ｕは超音波走査領域である。   FIG. 5 shows a distal end portion of a conventional sector scan type ultrasonic endoscope described in Patent Document 1, and the two treatment instrument projecting ports 11 and 12 are aligned with the ultrasonic probe 10 in axial position. Arranged in a state. U is an ultrasonic scanning region.

しかし、そのような構成においては、図６に示されるように、二つの処置具突出口１１，１２から同時に第１の処置具１０１と第２の処置具１０２が突出されると、超音波プローブ１０から遠い方に位置する第２の処置具１０２が近い方の第１の処置具１０１の陰になり、超音波プローブ１０から発信された超音波が第２の処置具１０２で反射されない。   However, in such a configuration, as shown in FIG. 6, when the first treatment tool 101 and the second treatment tool 102 are simultaneously projected from the two treatment tool projections 11 and 12, the ultrasonic probe is used. The second treatment instrument 102 located far from 10 is behind the near first treatment instrument 101, and the ultrasonic wave transmitted from the ultrasonic probe 10 is not reflected by the second treatment instrument 102.

そのため、図７に示されるように、超音波断層像には第１の処置具１０１のみが表示されて、第２の処置具１０２が全く表示されず、二つの処置具１０１，１０２を同時に用いる処置を行う上で制約になっていた。   Therefore, as shown in FIG. 7, only the first treatment instrument 101 is displayed in the ultrasonic tomographic image, the second treatment instrument 102 is not displayed at all, and the two treatment instruments 101 and 102 are used simultaneously. It was a restriction on the treatment.

本発明は、二つの処置具突出口から同時に突出させた二つの処置具が超音波断層像上に共に表示され易くなるようにして、二つの処置具を同時に用いる処置を安全に行うことができるセクタスキャン型超音波内視鏡の先端部を提供することを目的とする。   The present invention makes it possible to safely perform treatment using two treatment tools at the same time so that the two treatment tools projected simultaneously from the two treatment tool projection openings can be easily displayed on the ultrasonic tomographic image. An object of the present invention is to provide a distal end portion of a sector scan type ultrasonic endoscope.

上記の目的を達成するため、本発明のセクタスキャン型超音波内視鏡の先端部は、挿入部の先端に、挿入部の軸線と平行な断面を扇状に走査する超音波プローブが配置されると共に、処置具を超音波走査面に沿って後方から超音波走査領域内に突出させる二つの処置具突出口が設けられたセクタスキャン型超音波内視鏡の先端部において、二つの処置具突出口のうち、超音波プローブから離れた位置にある方の処置具突出口の側縁が、超音波プローブに近い位置にある方の処置具突出口の側縁より側方にはみ出す状態に、二つの処置具突出口を偏位させて配置したものである。   In order to achieve the above object, the distal end portion of the sector scan type ultrasonic endoscope of the present invention has an ultrasonic probe that scans a cross section parallel to the axis of the insertion portion in a fan shape at the distal end of the insertion portion. In addition, at the distal end portion of the sector scan type ultrasonic endoscope provided with two treatment tool projections for projecting the treatment tool from behind to the ultrasonic scanning area along the ultrasonic scanning surface, two treatment tool protrusions are provided. In the state where the side edge of the treatment tool projection port that is located far from the ultrasonic probe out of the mouth protrudes to the side of the side edge of the treatment tool projection port that is located near the ultrasonic probe. One treatment tool protrusion is deviated and arranged.

なお、二つの処置具突出口の中心軸線位置が、超音波プローブの中心軸線を間に挟んでその両側に分かれる位置関係に配置されているとよい。   In addition, it is good to arrange | position the center axis line position of two treatment tool protrusion ports in the positional relationship which divides | segments into the both sides on both sides of the center axis line of an ultrasonic probe.

本発明によれば、二つの処置具突出口のうち、超音波プローブから離れた位置にある方の処置具突出口の側縁が、超音波プローブに近い位置にある方の処置具突出口の側縁より側方にはみ出していることにより、二つの処置具突出口から同時に突出させた二つの処置具が超音波断層像上に共に表示され易くなり、二つの処置具を同時に用いる処置を安全に行うことができる。   According to the present invention, of the two treatment instrument protrusions, the side edge of the treatment instrument protrusion that is located away from the ultrasound probe is the side of the treatment instrument protrusion that is located near the ultrasound probe. By projecting from the side edge to the side, it is easy to display the two treatment tools that are simultaneously projected from the two treatment tool projections on the ultrasonic tomogram, making it safe to use the two treatment tools simultaneously. Can be done.

挿入部の先端に、挿入部の軸線と平行な断面を扇状に走査する超音波プローブが配置されると共に、処置具を超音波走査面に沿って後方から超音波走査領域内に突出させる二つの処置具突出口が設けられたセクタスキャン型超音波内視鏡の先端部において、二つの処置具突出口のうち、超音波プローブから離れた位置にある方の処置具突出口の側縁が、超音波プローブに近い位置にある方の処置具突出口の側縁より側方にはみ出す状態に、二つの処置具突出口を偏位させて配置する。   An ultrasonic probe that scans a section parallel to the axis of the insertion portion in a fan shape is disposed at the distal end of the insertion portion, and two treatment tools are projected from the rear along the ultrasonic scanning surface into the ultrasonic scanning region. At the distal end portion of the sector scan type ultrasonic endoscope provided with the treatment tool protrusion, the side edge of the treatment tool protrusion at the position away from the ultrasonic probe among the two treatment tool protrusions, The two treatment instrument protrusions are arranged so as to be displaced so that they protrude beyond the side edge of the treatment instrument protrusion that is closer to the ultrasonic probe.

以下、図面を参照して本発明の実施例を説明する。
図１と図２は、セクタスキャン型超音波内視鏡の先端部の平面図と斜視図である。
挿入部の先端に設けられた先端部本体１の先側半部に、先端部本体１の軸線と平行な断面を扇状に走査（セクタスキャン）するコンベックスタイプの超音波プローブ１０が配置されている。図２に示されるＵがその超音波走査領域であり、超音波プローブ１０の中心軸線Ｘ０位置から先端部本体１の側方に向かって扇形に超音波走査される。ただし、超音波断層像が得られるのは、厳密に超音波プローブ１０の中心軸線Ｘ０の側方断面に限られるのではなく、その側方断面からある程度の幅を有する範囲の断層である。 Embodiments of the present invention will be described below with reference to the drawings.
1 and 2 are a plan view and a perspective view of the distal end portion of the sector scan type ultrasonic endoscope.
A convex-type ultrasonic probe 10 that scans a section parallel to the axis of the distal end body 1 in a fan shape (sector scan) is disposed in the front half of the distal end body 1 provided at the distal end of the insertion portion. . U shown in FIG. 2 is the ultrasonic scanning region, and is ultrasonically scanned in a fan shape from the position of the central axis X0 of the ultrasonic probe 10 toward the side of the tip body 1. However, the ultrasonic tomographic image is not strictly limited to the lateral cross section of the central axis X0 of the ultrasonic probe 10, but is a tomographic area having a certain width from the lateral cross section.

先端部本体１の中間部分に斜め前方に超音波プローブ１０の超音波走査領域Ｕの方に向けて形成された斜面２には、光学観察のための観察窓４と照明窓５が配置されている。６は、送気送水ノズルである。   An observation window 4 and an illumination window 5 for optical observation are arranged on the inclined surface 2 formed obliquely forward toward the ultrasonic scanning region U of the ultrasonic probe 10 in the middle portion of the tip body 1. Yes. 6 is an air / water supply nozzle.

また、その斜面２の中央位置付近には、処置具を超音波走査面に沿って後方から超音波走査領域Ｕ内に突出させる第１の処置具突出口１１が設けられている。第１の処置具突出口１１は、挿入部内に挿通配置されている第１の処置具挿通チャンネル（図示せず）の出口開口であり、その有効内径は例えば２．８ｍｍ程度である。   Near the center position of the slope 2, a first treatment instrument protrusion 11 is provided for projecting the treatment instrument from behind to the ultrasonic scanning region U along the ultrasonic scanning surface. The first treatment instrument protrusion 11 is an outlet opening of a first treatment instrument insertion channel (not shown) inserted and arranged in the insertion portion, and has an effective inner diameter of, for example, about 2.8 mm.

斜面２部分よりやや後方位置の先端部本体１の側面には、処置具を超音波走査面に沿って後方から超音波走査領域Ｕ内に突出させる第２の処置具突出口１２が設けられている。第２の処置具突出口１２は、挿入部内に挿通配置されている第２の処置具挿通チャンネル（図示せず）の出口開口であり、その有効内径は例えば２．４ｍｍ程度である。   A second treatment instrument protrusion 12 is provided on the side surface of the distal end main body 1 slightly behind the slope 2 to project the treatment instrument from the rear into the ultrasonic scanning region U along the ultrasonic scanning surface. Yes. The 2nd treatment tool protrusion 12 is an exit opening of the 2nd treatment tool penetration channel (not shown) inserted and arranged in an insertion part, and the effective inner diameter is about 2.4 mm, for example.

そのように設けられた第１の処置具突出口１１と第２の処置具突出口１２は、各々の中心軸線Ｘ１，Ｘ２の位置が、超音波プローブ１０の中心軸線（厳密な意味での中心軸線の延長線を含む）Ｘ０を間に挟んでその両側に分かれる位置関係に偏位させて配置されている。   The first treatment instrument projection port 11 and the second treatment instrument projection port 12 provided as described above are such that the positions of the central axis lines X1 and X2 are the center axis line of the ultrasonic probe 10 (the center in the strict sense). (Including the extension line of the axis) (X0) is placed in a deviated position so as to be divided on both sides of the X0.

そして、その偏位により、図１に示されるように、超音波プローブ１０から離れた位置にある第２の処置具突出口１２の側縁１２ｓが超音波プローブ１０に近い位置にある第１の処置具突出口１１の側縁１１ｓより側方にはみ出す状態になっている。Δがそのはみ出し量であり、例えば０．１〜２．５ｍｍ程度が好ましく、さらに好ましくは０．５〜１．０ｍｍ程度である。 Due to the deviation, as shown in FIG. 1, the side edge 12 s of the second treatment instrument protrusion 12 at a position away from the ultrasonic probe 10 is located at a position close to the ultrasonic probe 10. It is in the state which protrudes from the side edge 11s of the treatment tool protrusion port 11 to the side. Δ is the amount of protrusion, and is preferably about 0.1 to 2.5 mm , and more preferably about 0.5 to 1.0 mm.

その結果、図３に示されるように、第１の処置具突出口１１と第２の処置具突出口１２から第１の処置具１０１と第２の処置具１０２が同時に超音波走査面に沿って後方から超音波走査領域Ｕ内に突出された時に、超音波プローブ１０側から見て第２の処置具１０２が完全には第１の処置具１０１の陰にならない。   As a result, as shown in FIG. 3, the first treatment tool 101 and the second treatment tool 102 are simultaneously moved along the ultrasonic scanning plane from the first treatment tool protrusion 11 and the second treatment tool protrusion 12. Thus, the second treatment instrument 102 is not completely hidden behind the first treatment instrument 101 when viewed from the ultrasound probe 10 side when projected into the ultrasound scanning region U from the rear.

したがって、超音波プローブ１０から発信された超音波が第２の処置具１０２でも反射され、図４に示されるように、超音波断層像には第１の処置具１０１のみでなく、第２の処置具１０２も少し薄くはなるものの表示され、二つの処置具１０１，１０２を同時に用いる処置を安全に行うことができる。   Therefore, the ultrasonic wave transmitted from the ultrasonic probe 10 is also reflected by the second treatment instrument 102, and as shown in FIG. 4, the ultrasonic tomographic image includes not only the first treatment instrument 101 but also the second treatment instrument 101. The treatment instrument 102 is also displayed although it becomes a little thinner, and the treatment using the two treatment instruments 101 and 102 at the same time can be performed safely.

なお、第１の処置具突出口１１と第２の処置具突出口１２の中心軸線Ｘ１，Ｘ２の位置が、超音波プローブ１０の中心軸線Ｘ０を間に挟んでその両側に分かれる位置関係に配置されていることにより、第２の処置具１０２に超音波が当たって反射する位置を超音波プローブ１０の中心軸線Ｘ０に近づけることができるので、第２の処置具１０２が超音波断層像に表れ易くなる。   It should be noted that the positions of the central axes X1 and X2 of the first treatment instrument protrusion 11 and the second treatment instrument protrusion 12 are arranged in such a positional relationship that the center axis X0 of the ultrasonic probe 10 is sandwiched between them. As a result, the position where the ultrasonic wave hits the second treatment instrument 102 and is reflected can be brought close to the central axis X0 of the ultrasonic probe 10, so that the second treatment instrument 102 appears in the ultrasonic tomographic image. It becomes easy.

本発明の実施例のセクタスキャン型超音波内視鏡の先端部の平面図である。It is a top view of the front-end | tip part of the sector scan type | mold ultrasonic endoscope of the Example of this invention. 本発明の実施例のセクタスキャン型超音波内視鏡の先端部の斜視図である。It is a perspective view of the front-end | tip part of the sector scan type | mold ultrasonic endoscope of the Example of this invention. 本発明の実施例のセクタスキャン型超音波内視鏡の先端部から二つの処置具が同時に突出した状態の斜視図である。It is a perspective view in the state where two treatment tools protruded simultaneously from the tip part of the sector scan type ultrasonic endoscope of the example of the present invention. 本発明の実施例のセクタスキャン型超音波内視鏡の先端部で二つの処置具が同時に用いられたときの超音波断層像の略示図である。It is the schematic of an ultrasonic tomogram when two treatment tools are used simultaneously at the front-end | tip part of the sector scan type | mold ultrasonic endoscope of the Example of this invention. 従来のセクタスキャン型超音波内視鏡の先端部の斜視図である。It is a perspective view of the front-end | tip part of the conventional sector scan type | mold ultrasonic endoscope. 従来のセクタスキャン型超音波内視鏡の先端部から二つの処置具が同時に突出した状態の側面断面図である。It is side surface sectional drawing of the state from which the two treatment tools protruded simultaneously from the front-end | tip part of the conventional sector scan type | mold ultrasonic endoscope. 従来のセクタスキャン型超音波内視鏡の先端部で二つの処置具が同時に用いられたときの超音波断層像の略示図である。It is a schematic diagram of an ultrasonic tomogram when two treatment tools are used simultaneously at the tip of a conventional sector scan type ultrasonic endoscope.

符号の説明Explanation of symbols

１ 先端部本体
１０ 超音波プローブ
１１ 第１の処置具突出口
１１ｓ 側縁
１２ 第２の処置具突出口
１２ｓ 側縁
１０１ 第１の処置具
１０２ 第２の処置具
Ｕ 超音波走査領域
Ｘ０ 超音波プローブの中心軸線
Ｘ１ 第１の処置具突出口の中心軸線
Ｘ２ 第２の処置具突出口の中心軸線 DESCRIPTION OF SYMBOLS 1 Tip part main body 10 Ultrasonic probe 11 1st treatment tool protrusion 11s Side edge 12 2nd treatment tool protrusion 12s Side edge 101 1st treatment tool 102 2nd treatment tool U Ultrasonic scanning area | region X0 Ultrasound Center axis of the probe X1 Center axis of the first treatment instrument protrusion X2 Center axis of the second treatment instrument protrusion

Claims (1)

挿入部の先端に、上記挿入部の軸線と平行な断面を扇状に走査する超音波プローブが配置されると共に、処置具を超音波走査面に沿って後方から超音波走査領域内に突出させる二つの処置具突出口が設けられたセクタスキャン型超音波内視鏡の先端部において、
上記二つの処置具突出口が各々上記超音波プローブの中心軸線の延長線から外れない位置に設けられて、
上記二つの処置具突出口の中心軸線位置が、上記超音波プローブの中心軸線の延長線を間に挟んでその両側に分かれる位置関係にあり、且つ、
上記二つの処置具突出口のうち、上記超音波プローブから離れた位置にある方の処置具突出口の側縁が、上記超音波プローブに近い位置にある方の処置具突出口の側縁より側方にはみ出す状態に、
上記二つの処置具突出口が偏位して配置されていることを特徴とするセクタスキャン型超音波内視鏡の先端部。 An ultrasonic probe that scans the cross section parallel to the axis of the insertion portion in a fan shape is disposed at the distal end of the insertion portion, and the treatment tool protrudes into the ultrasonic scanning region from behind along the ultrasonic scanning surface. In the tip of the sector scan type ultrasonic endoscope provided with two treatment tool projections,
The two treatment tool projections are provided at positions that do not deviate from the extension of the central axis of the ultrasonic probe,
The position of the central axis of the two treatment instrument protrusions is in a positional relationship that is divided on both sides of the extension line of the central axis of the ultrasonic probe, and
Of the two treatment instrument protrusions, the side edge of the treatment tool protrusion that is located away from the ultrasonic probe is more than the side edge of the treatment tool protrusion that is located close to the ultrasonic probe. In a state that protrudes to the side,
Tip of the sector-scan type ultrasonic endoscope, characterized in that the two treatment instrument projection port is arranged offset.
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