JP2820571B2 - Trocar - Google Patents

Trocar

Info

Publication number
JP2820571B2
JP2820571B2 JP4200073A JP20007392A JP2820571B2 JP 2820571 B2 JP2820571 B2 JP 2820571B2 JP 4200073 A JP4200073 A JP 4200073A JP 20007392 A JP20007392 A JP 20007392A JP 2820571 B2 JP2820571 B2 JP 2820571B2
Authority
JP
Japan
Prior art keywords
tube
trocar
elastic bag
needle
main body
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.)
Expired - Fee Related
Application number
JP4200073A
Other languages
Japanese (ja)
Other versions
JPH0638972A (en
Inventor
晴洋 井上
研二 河井
稔 柴田
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.)
Sumitomo Bakelite Co Ltd
Original Assignee
Sumitomo Bakelite Co 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 Sumitomo Bakelite Co Ltd filed Critical Sumitomo Bakelite Co Ltd
Priority to JP4200073A priority Critical patent/JP2820571B2/en
Publication of JPH0638972A publication Critical patent/JPH0638972A/en
Application granted granted Critical
Publication of JP2820571B2 publication Critical patent/JP2820571B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、患者の体表を穿刺し、
体壁に刺入して外套管を留置し、その管を通して内視鏡
や検査器具、外科的処置器具等を挿入するための套管針
に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention punctures the body surface of a patient,
The present invention relates to a trocar for inserting an endoscope, an inspection instrument, a surgical treatment instrument, and the like through an outer tube that is inserted into a body wall and placed therein.

【0002】[0002]

【従来の技術】腹部、胸部等の体表に、套管針を穿刺し
て外套管を留置し、そこから腹腔鏡や胸腔鏡等を挿入し
て検査や手術を行う術式が、近年広く行なわれつつあ
る。このような手術に使用される套管針として、一般的
に使用されているものは、体表から体壁に刺入して留置
される外套管と、その外套管の内腔に挿脱可能に作ら
れ、体表への刺入を容易に行なうための鋭利な先端部、
及び体外で把持し押圧するための把手を備えた内針とか
ら構成されている。
2. Description of the Related Art In recent years, there has been widely used a technique in which a trocar is punctured into a body surface of an abdomen, a chest, or the like to place an outer tube, and a laparoscope or a thoracoscopy is inserted therefrom to perform examination or surgery. It is taking place. Generally used trocars used in such operations are a trocar that is inserted into the body wall from the body surface and placed there, and can be inserted into and removed from the lumen of the trocar. Sharp tip for easy insertion into the body surface,
And an inner needle provided with a handle for grasping and pressing outside the body.

【0003】このような外套針には弁機構が備えられて
おり、体腔内を陽圧にして術野を確保するために送気さ
れたガスが、挿入した医療器具と外套管の隙間から漏出
して、陽圧が解除されるのを防止するのが一般的であ
る。術者が自由に開閉できるスライド式開閉装置、或い
はフラッター開閉装置(特開平1−209056号公
報)等が採用されているが、機構上、寸法精度の良い部
品を多く使用しているため製作費用が高くなり、また、
断面形状の異なる各種の挿入物に対しては気密性維持が
困難となる問題がある。
[0003] Such a trocar is provided with a valve mechanism, and gas supplied for positive pressure in the body cavity to secure an operation field leaks from a gap between the inserted medical instrument and the outer tube. In general, the positive pressure is prevented from being released. A slide type opening / closing device or a flutter opening / closing device (Japanese Patent Application Laid-Open No. Hei 1-209056), which can be freely opened and closed by an operator, is employed. However, since many parts with high dimensional accuracy are mechanically used, the manufacturing cost is increased. Is higher, and
There is a problem that it is difficult to maintain airtightness for various types of inserts having different cross-sectional shapes.

【0004】また別のアイデアとして、内装のバルーン
を膨らませることによって弁機構となす手段(第1回内
視鏡下外科手術研究会抄録、22頁(平成3.3.
2))が提案されている。これによると、軸の形状が真
円でない鉗子やクリップを用いても気密性が損なわれな
い効果が報告されているが、外套管基端部の成形品に内
側に膨出した膨張部材が備えられている。バルーン収縮
時の内側への膨出は挿入物への抵抗を増し、更に弁機構
の基端部が外套管本体に加わるように体表に位置するた
め、鋭角な弯曲形状の挿入物に対して、不必要な直線部
を形成する問題がある。
[0004] As another idea, a means for forming a valve mechanism by inflating an internal balloon (Abstract of the 1st Research Meeting for Endoscopic Surgery, page 22 (Heisei 3.3.
2)) has been proposed. According to this, although the effect that the airtightness is not impaired even when using a forceps or a clip having a shaft shape that is not a perfect circle has been reported, a molded product at the base end portion of the mantle tube is provided with an inflated member bulging inward. Have been. The inward bulging during balloon deflation increases resistance to the insert, and furthermore, because the proximal end of the valve mechanism is located on the body surface so as to be added to the main body of the mantle tube, it is difficult for the insert having a sharp curved shape. However, there is a problem that an unnecessary linear portion is formed.

【0005】また、一般的に外套管は金属等の剛性材料
で製作されている。これに対して従来から使用されてい
る腹腔鏡等の硬性鏡或いは、処置具類が直線状であるこ
とから、剛直であっても使用者はこれまで大きな支障を
感じなかった。しかし、従来は開腹術で施行され、術野
に適した種々の弯曲、屈曲形状の鉗子等処置具が常用さ
れていた症例にまで、外套管を通して外科手術が試みら
れるようになった現状を鑑みると、剛直管の内径の範囲
内で挿入可能と言う寸法的制約の下で設計された鉗子や
クリップ等の処置具では、手術操作に不満がみられるよ
うになった。
[0005] Generally, the mantle tube is made of a rigid material such as metal. On the other hand, since a rigid microscope such as a laparoscope or a treatment tool which has been conventionally used is linear, the user has not felt any great trouble even if it is rigid. However, in view of the current situation, surgery has been attempted through a mantle tube even in cases where conventional treatment tools such as forceps with various curved and bent shapes suitable for the surgical field were conventionally used for laparotomy. In addition, surgical tools such as forceps and clips designed under the dimensional restriction that they can be inserted within the range of the inner diameter of the rigid pipe have been unsatisfactory in the surgical operation.

【0006】その現れとして、前述したバルーン方式を
採用した報告では、外套管自体に可撓性のあるシリコン
製ソフトトラカールを提案している。その結果として、
弯曲した鉗子の挿入が可能になり、肝の圧排操作などで
損傷を生ずることが少なくなった。しかし、軸方向の体
壁刺入抵抗や周辺組織の圧迫力に抗して、外套管の形状
を保つためには、強度上ある程度の肉厚化は避けられ
ず、刺入孔の拡大、或いは事前の小切開が必要となる
等、患者の侵襲を増す問題がある。
As a manifestation, a report adopting the above-mentioned balloon method proposes a soft trocar made of silicon, which has a flexible mantle tube itself. As a result,
Curved forceps can be inserted, and damage due to liver retraction is reduced. However, in order to maintain the shape of the mantle tube against the axial penetration resistance of the body wall and the compressive force of the surrounding tissue, it is inevitable that the thickness of the mantle tube is increased to some extent in terms of strength. There is a problem that the invasion of the patient increases, for example, a small incision is required in advance.

【0007】更に、内針の先端部が体腔内に穿破した
時、内臓器に当って不必要な損傷を生ずるのを防止する
安全装置として、手元側にバネ機構を有するスリーブを
内針の外周に備え、体壁刺入の抵抗が少なくなった時、
即ち、内針先端部が体腔内に穿破した時にスリーブが突
き出して、内針先端部を保護する機構が考案されている
(特開平2−65854号公報)。術者が安心して刺入
できることから普及しているが、これは内針と外套管の
隙間でスリーブが摺動する機構をとっているので、外套
管は剛性であることが望ましく、また高精度な部品が必
要とされるコスト的な問題がある。
Further, as a safety device for preventing unnecessary damage to the internal organs when the tip of the inner needle pierces the body cavity, a sleeve having a spring mechanism at the hand side is provided as a safety device. In preparation for the outer circumference, when the resistance of the body wall penetration is reduced,
That is, a mechanism has been devised in which the sleeve protrudes when the tip portion of the inner needle penetrates into the body cavity to protect the tip portion of the inner needle (Japanese Patent Laid-Open No. 2-65854). It is widely used because the surgeon can insert it with peace of mind. However, since the sleeve slides in the gap between the inner needle and the outer tube, the outer tube is preferably rigid and highly accurate. There is a cost problem that requires complicated parts.

【0008】また、体壁に留置された外套管は、術中、
内視鏡や鉗子等の器具類が頻繁に抜去・交換されるた
め、体壁に確実に固定し、術中の自然逸脱を防止する手
段が必要とされる。その手段の一例として、体表に套管
針を刺入し、外套管基端部に備えられた、螺旋状の突起
部を体壁組織に捩り込み固定する部材が開示されている
(臨床外科,46(8),943〜953(199
1))。この方式は、その確実性を高く評価されている
が、体壁組織を著しく傷つける問題がある。また別の方
法として、刺入孔の内壁面に接触固定する弾性部材をバ
ルーンとして膨張させることが開示されている(実開平
2−17105号公報)。この方式は体壁組織に鋭利な
損傷を与えることなく、気密固定できる点では優れてい
るが、外套管外壁からの盛り上りは避けられず、套管針
刺入抵抗が増加する問題点がある。
[0008] In addition, the mantle tube placed in the body wall is
Since instruments such as endoscopes and forceps are frequently removed and replaced, a means for securely fixing to the body wall and preventing natural deviation during the operation is required. As an example of such means, a member has been disclosed in which a trocar is inserted into the body surface and a helical projection provided at the proximal end of the mantle tube is screwed and fixed to body wall tissue (clinical surgery). , 46 (8), 943-953 (199).
1)). Although this method has been highly evaluated for its reliability, it has a problem of significantly damaging body wall tissue. As another method, it is disclosed that an elastic member which is fixed to the inner wall surface of the insertion hole is inflated as a balloon (Japanese Utility Model Laid-Open No. 2-17105). This method is excellent in that it can be airtightly fixed without sharply damaging the body wall tissue, but has a problem that bulging from the outer wall of the trocar is inevitable and trocar penetration resistance increases. .

【0009】[0009]

【発明が解決しようとする課題】本発明は、套管針に関
わる前述のような問題点を解決するために、種々の検討
の結果なされたもので、その目的とするところは、術野
に適した種々の弯曲、屈曲形状の鉗子等処置具を挿入で
きる屈曲自由度をもち、体腔からのガス漏れや、刺入時
の内臓器の損傷を防止し、刺入抵抗が少なく、安全確実
に外套管を体壁に固定できる套管針を提供することにあ
る。
DISCLOSURE OF THE INVENTION The present invention has been made as a result of various studies in order to solve the above-mentioned problems relating to the trocar. It has a degree of freedom to insert treatment tools such as forceps of various curved and bent shapes, and prevents gas leakage from the body cavity and damage to internal organs at the time of insertion, low insertion resistance and safe and secure An object of the present invention is to provide a trocar that can fix an outer tube to a body wall.

【0010】[0010]

【課題を解決するための手段】上記の目的を達成するた
めの本発明による套管針は、体壁に刺入、固定される外
套管と、該外套管の内腔に挿脱可能に形成され、先端に
穿刺部、後端に把持部を有する内針とで構成される套管
針であって、前記外套管は、螺旋体で補強された屈曲自
在な可撓性の本体部と、鍔状の基端部から成り、該本体
部の基端部近傍の内面には膨出可能な内弾性袋を設け、
基端部近傍の管壁内には該内弾性袋と気液流通した枝管
Aを設け、該枝管Aは基端部の後面で枝分かれしている
ことを特徴とする。
A trocar according to the present invention for achieving the above object has an outer tube inserted and fixed to a body wall, and is formed so as to be insertable into and removable from a lumen of the outer tube. A trocar comprising a puncture portion at the distal end and an inner needle having a grip portion at the rear end, wherein the outer trocar comprises a bendable flexible main body reinforced by a spiral body, and a flange. An inflatable inner elastic bag is provided on the inner surface near the base end of the main body,
A branch pipe A is provided in the pipe wall near the base end in gas-liquid communication with the inner elastic bag, and the branch pipe A is branched at a rear surface of the base end.

【0011】また更に、前記外套管本体部の先端部近傍
に、管壁内に内蔵した螺旋体を長さ方向に伸縮可能に形
成した伸縮部を設け、あるいは、前記外套管本体部の先
端部近傍及び/もしくは基端部近傍の外面に、膨出可能
な外弾性袋を設け、本体部の管壁内には該外弾性袋と気
液流通した枝管Bを設け、該枝管Bは気端部の後面で枝
分かれしていることを特徴とする。
[0011] Further, a telescopic part in which a helical body built in the pipe wall is formed so as to be able to expand and contract in the longitudinal direction is provided near the distal end of the main body of the outer tube, or in the vicinity of the distal end of the main body of the outer tube. And / or an inflatable outer elastic bag is provided on the outer surface near the base end, and a branch pipe B is provided in the tube wall of the main body in gas-liquid communication with the outer elastic bag. It is characterized by being branched at the rear surface of the end.

【0012】以下、図示した実施例に基づいて、本発明
を詳細に説明する。図1は本発明の一実施例となる套管
針の全体を示す図で、図2は外套管の基端部近傍に設け
た内弾性袋を説明するための図、図3は外套管の先端部
近傍に形成した伸縮部を説明するための図、図4は外套
管の外面に設けた外弾性袋を説明するための図である。
Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 is a view showing the entirety of a trocar according to an embodiment of the present invention, FIG. 2 is a view for explaining an inner elastic bag provided near the base end of the outer tube, and FIG. FIG. 4 is a diagram for explaining an elastic portion formed near the distal end portion, and FIG. 4 is a diagram for explaining an outer elastic bag provided on the outer surface of the outer tube.

【0013】本発明による套管針は、図1(b)に示す
ような本体部(4)と先端チップ(6)及び鍔状の基端
部(5)から成る外套管と、図1(a)に示すような先
端に穿刺部(針先1)、後端に把持部(把手3)を有す
る内針とで基本的に構成されている。図1(c)は、外
套管の内腔に内針を挿通し、基端部から出た枝管(7)
にパイロットバルーン(8)及び逆止弁(9)を付設し
た套管針全体の概観を示している。
The trocar according to the present invention comprises an outer trocar comprising a main body (4), a distal tip (6) and a flange-like proximal end (5) as shown in FIG. As shown in a), it is basically composed of a puncture part (needle tip 1) at the front end and an inner needle having a grip part (handle 3) at the rear end. FIG. 1 (c) shows a branch tube (7) which has been inserted through the inner lumen of the mantle tube and emerged from the proximal end.
Shows an overview of the entire trocar with the pilot balloon (8) and the check valve (9).

【0014】内針は、針本体(2)の先端に穿刺、刺入
部となる鋭利な穿刺部(針先1)を持ち、後端に把持部
となる把手(3)を備えたもので、従来から用いられて
いるものでよく、特に目新しいものではない。その寸法
は、適用する部位の体壁の厚みや、使用される器具の外
径や有効長等によって決まって来るが、例えば腹部に使
用されるものでは、針先(1)及び針本体(2)の外径
は3〜20mm、把手(3)の根本までの長さ、即ち外套
管有効長は40〜200mmが適当である。
The inner needle has a sharp puncture portion (needle tip 1) at the tip end of the needle body (2) as a puncture and puncture portion, and a handle (3) at the rear end as a grip portion. It may be a conventionally used one, and is not particularly new. The dimensions are determined by the thickness of the body wall of the site to be applied, the outer diameter and effective length of the instrument used, and for example, in the case of the abdomen, the needle tip (1) and the needle body (2) 3) is suitable for the outer diameter of 3 to 20 mm, and the length up to the root of the handle (3), that is, the effective length of the mantle tube is 40 to 200 mm.

【0015】針先(1)は、矢尻のような1〜複数個の
斜面をもつ多角錘、或いは円錐形等先端に鋭利な刃先を
持ち、皮膚や筋肉層等生体組織を穿破する切味が要求さ
れる。ただ、径の太い外套管を使用するときは、必然的
に外径の大きい針先が必要になり、この場合は針先だけ
で穿刺し刺入するのは困難を伴なうため、体表の一部を
切開した上で穿刺することもある。このような体表切開
を前提とした使用方法では、針先は必ずしも鋭利である
必要はなく、体腔臓器を保護するために、半球状の丸味
を帯びた形状が好まれることもある。針先の材質として
は、ステンレス鋼、チタニウム合金、アルミ合金等の金
属が一般的に使用される。
The needle point (1) has a sharp edge such as a polygonal pyramid having one or a plurality of slopes such as an arrowhead or a cone, and has a sharpness for penetrating biological tissues such as skin and muscle layers. Is required. However, when using a large-diameter mantle tube, a needle with a large outer diameter is inevitably needed.In this case, it is difficult to puncture and insert only with the needle. The puncture may be made after incising a part of the body. In such a usage method based on the incision of the body surface, the needle tip does not necessarily need to be sharp, and a hemispherical rounded shape may be preferred in order to protect body cavity organs. As the material of the needle tip, metals such as stainless steel, titanium alloy, and aluminum alloy are generally used.

【0016】針本体(2)は、針先(1)と同じ材質で
一体に形成しても良いが、図2のように針先とは別に作
って接合しても良い。その場合、針先と同じ金属材料で
あっても、中空のパイプ状等にすることで軽量化が可能
であり、また、ABS樹脂、ポリカーボネート樹脂、ナ
イロン樹脂、硬質塩化ビニル樹脂、ポリサルフォン樹脂
等の剛性のある硬質プラスチック、或いはセラミック材
でも製作できる。
The needle body (2) may be formed integrally with the same material as the needle tip (1), but may be formed separately from the needle tip and joined as shown in FIG. In that case, even if the same metal material as the needle tip is used, it is possible to reduce the weight by forming a hollow pipe or the like, and it is also possible to use ABS resin, polycarbonate resin, nylon resin, hard vinyl chloride resin, polysulfone resin, or the like. It can also be made of rigid hard plastic or ceramic material.

【0017】また、把手(3)は、外径30〜80mmの
円筒型、球型、楕円型、或いは立方体等種々の形状を取
りうるが、術者の掌中に納まり易い大きさ、形状にする
必要がある。通常は外套管の基端部(5)と共に把持し
て体表に強く押し当てるので、穿刺抵抗で押し戻され後
退する外套管を受けとめるように、基端部(5)の内腔
の径より太い突き当て面をその根本に設けることが必要
である。把手(3)の材質は特に限定されるものではな
い。針先(1)や針本体(2)と同じ材質で一体に形成
してもよく、また、異なる材質で作って組立てしてもよ
いが、硬質プラスチックの射出成形等によるのが比較的
安価に製作できて好ましい。
The handle (3) can have various shapes such as a cylindrical shape, a spherical shape, an elliptical shape, or a cubic shape having an outer diameter of 30 to 80 mm. There is a need. Usually, it is grasped together with the proximal end portion (5) of the mantle tube and strongly pressed against the body surface, so that the diameter of the lumen of the proximal end portion (5) is larger than that of the lumen of the proximal end portion (5) so as to receive the mantle tube pushed back by the puncture resistance and retreating. It is necessary to provide an abutment surface at its root. The material of the handle (3) is not particularly limited. The needle tip (1) and the needle body (2) may be integrally formed of the same material, or may be made of a different material and assembled, but it is relatively inexpensive to use injection molding of a hard plastic. It is preferable that it can be manufactured.

【0018】次に、外套管は、内層(10)と外層(1
1)の間に螺旋体(12)を配し、その空隙を封入材
(13)で充填した構造の本体部(4)の、先端に先端
チップ(6)を、また、後端に鍔状の基端部(5)を接
続したもので、本体部(4)は屈曲自在な可撓性を持
ち、その内腔に基端部(5)の入口から内針を挿脱でき
る構造になっている。そして、基端部(5)の近傍で内
層(10)が封入材(13)の層から剥離して内弾性袋
(14)を形成しており、内弾性袋(14)と封入材
(13)の間の隙間には、内弾性袋(14)を膨張、収
縮させる気液流通のための細通路となる枝管(7)の先
端部が挿入、付設されている。
Next, the mantle tube is composed of the inner layer (10) and the outer layer (1).
A body (4) having a structure in which a spiral body (12) is arranged between 1) and the space thereof is filled with an encapsulating material (13) has a tip tip (6) at the front end and a flange-like shape at the rear end. The base end (5) is connected, and the main body (4) has a bendable flexibility so that the inner needle can be inserted into and removed from the lumen through the inlet of the base end (5). I have. The inner layer (10) peels off from the layer of the encapsulant (13) near the base end (5) to form an inner elastic bag (14), and the inner elastic bag (14) and the encapsulant (13) are formed. ), A distal end of a branch pipe (7) serving as a narrow passage for gas-liquid flow for inflating and contracting the inner elastic bag (14) is inserted and attached.

【0019】外套管のサイズは、内腔径3〜20mm、全
長40〜200mmで、施術部位の体壁の厚みや使用する
手術用器具の軸外径、有効長等に合わせて選択される。
図1(c)に示すように内針を装着した状態で、針先
(1)の刃先を形成する斜面が終る位置から、先端チッ
プ(6)の先端面までの距離は0〜10mm程度とするの
が適切であり、体腔内へ必要以上の深さまで刺入するの
を避ける意味からより短い方が好ましい。また、先端チ
ップ(6)及び本体部(4)の外径は、体壁の実質的な
刺入孔を決定するため、外套管の内腔径が同じであれ
ば、生体組織に対する侵襲度を下げる意味で細い方が望
ましく、従ってその肉厚は3mm以下とするのが好まし
い。
The size of the mantle tube is 3 to 20 mm in lumen diameter and 40 to 200 mm in total length, and is selected in accordance with the thickness of the body wall of the treatment site, the outer diameter of the shaft of the surgical instrument to be used, the effective length, and the like.
With the inner needle attached as shown in FIG. 1 (c), the distance from the position where the slope forming the cutting edge of the needle tip (1) ends to the tip end surface of the tip (6) is about 0 to 10 mm. It is preferable that the length be shorter in order to avoid piercing the body cavity to an unnecessary depth. In addition, since the outer diameters of the distal end tip (6) and the main body (4) determine a substantial puncture hole in the body wall, if the lumen diameter of the mantle tube is the same, the degree of invasion to living tissue is reduced. It is desirable to be thin in the sense of lowering the thickness. Therefore, it is preferable that the thickness is 3 mm or less.

【0020】先端チップ(6)は、穿刺時の刺入抵抗を
軽減するため先端側を細くし、好ましくは、体腔臓器を
傷つけないようにその尖端部が丸味を帯びており、針先
(1)と隙間が少ないことが望まれる。また、後端側は
内層(10)と外層(11)に挟まれ、螺旋体(12)
及び/または封入材(13)と連結する接続部を持ち、
接着固定されている。更にその接続部は、内外面共に滑
らかに仕上げられており、無用な刺入抵抗及び内針との
摩擦抵抗を発生しないようにするのが良い。
The distal tip (6) is tapered at its distal end in order to reduce puncture resistance at the time of puncturing. Preferably, its tip is rounded so as not to injure a body cavity organ. ) And a small gap is desired. The rear end side is sandwiched between the inner layer (10) and the outer layer (11), and the spiral body (12)
And / or has a connection to connect with the encapsulant (13),
Adhesively fixed. Further, the connection portion is preferably finished smoothly on both the inner and outer surfaces so as to prevent unnecessary insertion resistance and frictional resistance with the inner needle.

【0021】基端部(5)は、本体部(4)の外周より
5〜20mm突き出た鍔部を有し、その平面形状は円形、
楕円形、長方形等種々の形状をとりうるが、前述したと
おり、内針の把手(3)と共に術者の掌中に納まり易い
形状であれば特に限定されるものではなく、その厚みは
3〜8mm程度である。また、先端側には、本体部(4)
の内層(10)と外層(11)に挟まれ、螺旋体(1
2)と連結する接続部を持ち、これらと接着固定されて
いる。全体の長さは出来るだけ短くするのが望ましく、
基端部(5)後端面の開口部は、内針の挿入操作がし易
いように、コーナーをテーパー状或いはアール状に面取
りを施すのが好ましい。
The base end portion (5) has a flange portion protruding from the outer periphery of the main body portion (4) by 5 to 20 mm.
Although it can take various shapes such as an oval shape and a rectangular shape, as described above, the shape is not particularly limited as long as it can easily fit in the operator's palm together with the handle (3) of the inner needle, and its thickness is 3 to 8 mm. It is about. In addition, the main body (4)
Between the inner layer (10) and the outer layer (11)
It has a connection part to be connected to 2), and is adhesively fixed thereto. It is desirable to make the overall length as short as possible,
The opening at the rear end face of the base end (5) is preferably chamfered in a tapered or rounded corner so that the inner needle can be easily inserted.

【0022】先端チップ(6)は、刺入抵抗により容易
に捲り上がらず変形しない硬度と弾力性が必要であり、
また、基端部(5)は、周囲の体壁からの収縮圧力に抗
して刺入孔を維持し、術後抜去するときの把持部となり
うる保形性と硬度が必要とされる。このような要求を満
たし得る先端チップ(6)及び基端部(5)の材質とし
ては、硬質塩化ビニル樹脂、ABS樹脂、ポリカーボネ
ート樹脂等の汎用硬質樹脂、或いは軟質塩化ビニル樹
脂、ポリウレタン樹脂、ポリエチレン樹脂、シリコーン
ゴム、天然ゴム等の汎用の可撓性樹脂等が使用でき、切
削加工、射出成形、圧縮成形などで容易に成形できる。
The tip (6) needs to have hardness and elasticity that do not easily roll up and deform due to piercing resistance.
In addition, the proximal end (5) is required to maintain a puncture hole against contraction pressure from the surrounding body wall, and to have shape retention and hardness that can serve as a grip portion when the post-operative removal is performed. Materials for the tip (6) and the base (5) that can satisfy such requirements include general-purpose hard resins such as hard vinyl chloride resin, ABS resin, and polycarbonate resin, or soft vinyl chloride resin, polyurethane resin, and polyethylene. General-purpose flexible resins such as resin, silicone rubber, and natural rubber can be used, and can be easily formed by cutting, injection molding, compression molding, or the like.

【0023】次に、本体部(4)は、先に述べたよう
に、内層(10)、外層(11)、螺旋体(12)、及
び封入材(13)から構成されているが、その全体の肉
厚は3mm以下とするのが好ましい。その材質としては、
内層(10)及び外層(11)は、シリコーンゴム、天
然ゴム、ポリウレタン、軟質塩化ビニル樹脂等のゴムま
たは軟質の合成樹脂が使用でき、ディッピング成形、ス
ラッシュ成形、押出成形等で製作された肉厚0.1〜
1.5mmのチューブ状である。
Next, the main body (4) is composed of the inner layer (10), the outer layer (11), the spiral body (12), and the encapsulant (13) as described above. Is preferably 3 mm or less. As its material,
The inner layer (10) and the outer layer (11) can be made of rubber or soft synthetic resin such as silicone rubber, natural rubber, polyurethane, soft vinyl chloride resin, etc., and are made by dipping, slash, or extrusion. 0.1 ~
It is a 1.5 mm tube.

【0024】螺旋体(12)としては、ステンレス鋼、
ニッケルチタニウム合金等の金属、好ましくはバネ鋼を
用いるのが良い。その他に、弾力性と柔軟性を有する合
成樹脂線も使用可能で、例えば、ポリアミド樹脂、ポリ
エステル樹脂等の合成樹脂線が用いられる。その線径は
0.1〜1.5mm、好ましくは0.4〜0.7mmであ
り、螺旋のピッチは0.3〜3mmとするのが適当であ
る。
As the spiral body (12), stainless steel,
It is preferable to use a metal such as a nickel titanium alloy, preferably a spring steel. In addition, a synthetic resin wire having elasticity and flexibility can be used. For example, a synthetic resin wire such as a polyamide resin or a polyester resin is used. The wire diameter is 0.1 to 1.5 mm, preferably 0.4 to 0.7 mm, and the spiral pitch is suitably 0.3 to 3 mm.

【0025】また、封入材(13)は、内層(10)、
外層(11)及び螺旋体(12)を接着固定し、一体化
するもので、これら三つの部品を組合せ注射針のような
細いノズルを使って、液状樹脂を必要部位に注入するこ
とにより、容易に製作することができる。この時、基端
部(5)の近傍に位置する内層(10)の一部を、封入
材(13)と接着固定しない、即ち剥離させておくこと
により、膨出可能な内弾性袋(14)を形成させる。
使用される液状樹脂としては、例えば、シリコーンゴ
ム、ポリウレタン樹脂等の硬化後可撓性を有す合成樹脂
が好適である。この他、内層(10)、外層(11)及
び封入材(13)を独立した部品ではなく、例えば、螺
旋体(12)を液状シリコーンゴム射出成形金型にイン
サートすることにより、一体形成することも可能で、こ
れも無論、本発明の範畴に含まれる。
Further, the encapsulant (13) comprises an inner layer (10),
The outer layer (11) and the helical body (12) are adhered and fixed and integrated, and these three parts can be easily injected by using a thin nozzle such as a combination injection needle to inject the liquid resin into the required site. Can be manufactured. At this time, a part of the inner layer (10) located in the vicinity of the base end (5) is not adhered and fixed to the encapsulant (13), that is, by peeling it off, the inner elastic bag (14) which can be expanded. ) Is formed.
As the liquid resin to be used, for example, a synthetic resin having flexibility after curing such as silicone rubber or polyurethane resin is suitable. In addition, the inner layer (10), the outer layer (11), and the encapsulant (13) are not independent parts, but may be integrally formed, for example, by inserting the spiral body (12) into a liquid silicone rubber injection mold. Yes, and this is of course included in the category of the present invention.

【0026】枝管(7)の一端は、先に述べたように、
封入材(13)と内弾性袋(14)の間の隙間、即ち内
弾性袋(14)内に開口して気液流通しており、他端は
基端部(5)内を通ってその後端面から出て枝分かれし
ている。その材質としては、軟質塩化ビニル樹脂、ウレ
タン樹脂、シリコーンゴム、天然ゴムのような適度な柔
軟性と硬度を持つ材料が好適で、押出成形された内径
0.3〜2mm、肉厚0.3〜1.5mm、長さ5〜20cm
程度のチューブが使用される。
One end of the branch pipe (7) is, as described above,
The gap between the encapsulant (13) and the inner elastic bag (14), that is, it opens into the inner elastic bag (14) to allow gas-liquid circulation, and the other end passes through the base end (5) and thereafter. It branches out from the end face. As the material thereof, a material having appropriate flexibility and hardness such as soft vinyl chloride resin, urethane resin, silicone rubber, and natural rubber is preferable, and an extruded inner diameter of 0.3 to 2 mm and a wall thickness of 0.3. ~ 1.5mm, length 5-20cm
A few tubes are used.

【0027】枝管(7)の後端には、図1(c)に示し
たように、内弾性袋(14)を膨張、収縮させるため
の、パイロットバルーン(8)と逆止弁(9)からなる
膨張装置を接続する。パイロットバルーン(8)及び逆
止弁(9)は、市販の医療用バルーン製品に一般的に使
用されている部品を用いればよい。逆止弁(9)は注射
筒の着脱が容易に出来るようになっていて、気体または
液体を注入、排出することによって内弾性袋(14)を
膨張または収縮させることが出来る。パイロットバルー
ン(8)は内弾性袋(14)の膨張状態をモニターする
ためのものであるが、パイロットバルーンと逆止弁を、
市販の二方又は三方コックで代替しても十分機能として
満足できる。
As shown in FIG. 1C, a pilot balloon (8) and a check valve (9) for inflating and deflating the inner elastic bag (14) are provided at the rear end of the branch pipe (7). ) Is connected. As the pilot balloon (8) and the check valve (9), components generally used in commercially available medical balloon products may be used. The check valve (9) is designed so that the syringe can be easily attached and detached, and can inflate or contract the inner elastic bag (14) by injecting or discharging gas or liquid. The pilot balloon (8) is for monitoring the inflated state of the inner elastic bag (14).
Even if it is replaced with a commercially available two-way or three-way cock, it is satisfactory as a function.

【0028】次に、内弾性袋(14)の働きについて述
べる。本発明による套管針を体表に穿刺し、体壁に刺入
して内針を抜去すると、図2(a)に示したように、外
套管の内腔は開いているため、体腔を膨らますために送
入された陽圧ガスが漏出する。そこで、枝管(7)から
気体又は液体を注入して内弾性袋(14)を膨張させる
と、図2(b)のように、外套管の内腔が閉塞されて、
陽圧ガスの漏出を防ぐことが出来る。また、図2(c)
に示したように、外套管の内腔に種々の医療用具(1
9)を挿入した場合にも、内弾性袋(14)を膨張させ
ることにより、外套管と医療用具の柄の隙間が埋められ
て、気密にシールすることが出来る。
Next, the operation of the inner elastic bag (14) will be described. When the trocar according to the present invention is punctured into the body surface, inserted into the body wall, and the inner needle is removed, as shown in FIG. 2 (a), the inner lumen of the outer trocar is open. Positive pressure gas sent to inflate leaks. Then, when gas or liquid is injected from the branch pipe (7) to expand the inner elastic bag (14), the inner lumen of the outer tube is closed as shown in FIG.
Positive pressure gas leakage can be prevented. FIG. 2 (c)
As shown in the figure, various medical devices (1) are inserted into the lumen of the mantle tube.
Even when 9) is inserted, the space between the mantle tube and the handle of the medical device is filled by inflating the inner elastic bag (14), so that the airtight seal can be obtained.

【0029】また、針先(1)は前述のように先端に鋭
利な刃先を持っているので、外套管本体部(4)の内腔
に針本体(2)を挿入しセットした時、図3(b)に示
したように、針先(1)が本体部(4)の先端チップ
(6)内に収納され隠れているのが、安全上好ましい。
そして、穿刺時には先端チップ(6)が自然に後退し
て、針先(1)が完全に露出する機構が望ましいが、そ
の一例として図3(a)のような構造により、伸縮部
(15)を設けるのが有効である。
Since the needle tip (1) has a sharp cutting edge at the tip as described above, when the needle main body (2) is inserted and set in the lumen of the mantle tube main body (4), the figure will be described. As shown in FIG. 3 (b), it is preferable from the viewpoint of safety that the needle tip (1) is housed and hidden in the tip (6) of the main body (4).
At the time of puncturing, it is desirable to have a mechanism in which the tip (6) naturally retreats and the needle tip (1) is completely exposed. As an example, a structure as shown in FIG. It is effective to provide

【0030】即ち、外套管の本体部(4)を構成する内
層(10)と外層(11)の間の空隙の内、先端部近傍
の一部に、封入材(13)を充填しない部位を設けて、
管壁内に内蔵した螺旋体(12)を長さ方向に伸縮可能
にすることにより、伸縮部(15)を形成する。使用時
には、術者が把手(3)や基端部(5)を把持して体壁
に突き刺し、生体組織に針先(1)が進入して行く際
に、刺入抵抗を先端チップ(6)に受けて伸縮部(1
5)の内蔵する螺旋体(12)が圧縮され、図3(c)
に示すように先端チップ(6)が後退して針先(1)が
露出し、穿刺が滑らかに進行する。続いて、針先(1)
及び先端チップ(6)が体腔内に進入し終ると刺入抵抗
が減少し、螺旋体(12)の弾性回復力により伸縮部
(15)の長さが回復して、先端チップ(6)を押し出
し、針先(1)を収納した状態、図3(b)の状態に復
帰する。
That is, a portion of the space between the inner layer (10) and the outer layer (11) constituting the main body (4) of the mantle tube, in which a part near the tip is not filled with the sealing material (13), is formed. Provided,
The elastic part (15) is formed by making the spiral body (12) built in the tube wall expandable and contractible in the length direction. In use, the surgeon grasps the handle (3) and the proximal end (5) and pierces the body wall, and when the needle tip (1) enters the living tissue, the penetration resistance is reduced by the distal tip (6). ) To the elastic part (1
The built-in spiral (12) of 5) is compressed, and FIG.
As shown in (2), the tip (6) is retracted, the needle tip (1) is exposed, and the puncture proceeds smoothly. Then, the needle point (1)
When the distal tip (6) has completely entered the body cavity, the puncture resistance is reduced, and the length of the elastic portion (15) is recovered by the elastic recovery force of the spiral body (12), thereby pushing out the distal tip (6). The state returns to the state in which the stylus (1) is stored, and the state shown in FIG.

【0031】図3(c)のように伸縮部(15)が圧縮
変形された状態では、伸縮部の管壁を構成する内外層
(10,11)は蛇腹状に折りたたまれて螺旋体(1
2)の隙間に入り込む。外套管の全長は、伸縮部(1
5)の収縮代と針先(1)の刃先長を勘案して決定され
るが、一般的には収縮代は針先(1)の刃先長+5mm程
度とするのが好ましい。 また、針先(1)の外径は、
先端チップ(6)の内径とほぼ同じ寸法とし、穿刺中に
生体組織が先端チップ(6)の内側の隙間に進入して余
分な刺入抵抗とならないようにするが、針本体(2)の
外径は、外套管の内径未満であれば良く、針と外套管の
間の滑り抵抗の軽減、或いは前記の伸縮部(15)の管
壁層の蛇腹変形部を吸収するために、細径にする工夫も
本発明の範畴に含まれる。
As shown in FIG. 3 (c), when the expansion and contraction portion (15) is compressed and deformed, the inner and outer layers (10 and 11) constituting the tube wall of the expansion and contraction portion are folded in a bellows shape to form the spiral body (1).
Go into the gap of 2). The total length of the mantle tube is
The contraction allowance is determined in consideration of the shrinkage allowance of 5) and the blade tip length of the needle tip (1). In general, it is preferable that the contraction allowance is set to about +5 mm of the blade tip length of the needle tip (1). The outer diameter of the needle tip (1) is
The inner diameter of the distal tip (6) is set to be approximately the same as that of the distal tip (6) so that the living tissue does not enter the gap inside the distal tip (6) during puncturing and does not cause extra penetration resistance. The outer diameter may be smaller than the inner diameter of the mantle tube, and may be small in order to reduce the sliding resistance between the needle and the mantle tube, or to absorb the bellows deformed portion of the tube wall layer of the telescopic portion (15). The present invention is also included in the category of the present invention.

【0032】本発明による套管針を穿刺して外套管を体
壁に留置したときに、外套管が体壁から脱落したり、あ
るいはその先端部が体腔から逸脱するのを防止するた
め、図4に示したように、外套管本体部(4)の先端部
近傍、及び/もしくは基端部(5)近傍の外面に、膨出
可能な外弾性袋(16,17)に設ける。その方法は、
図2に示した内弾性袋(14)と同様に、該当する部位
の管壁を構成する外層(11)と封入材(13)とを接
着固定させず、剥離させておくことによって外弾性袋
(16,17)を形成させる。また、伸縮部(15)を
これに当ててもよい。そして、封入材(13)と外弾性
袋(16、17)の間の隙間、即ち、外弾性袋(16,
17)内には気液流通路となる枝管(7,18)の一端
を開口させ、他端は外套管の管壁及び基端部(5)内を
通って、その後端面から出て枝わかれしている。
When the trocar according to the present invention is punctured and the trocar is indwelled on the body wall, the trocar is prevented from dropping off the body wall or the tip of the trocar from deviating from the body cavity. As shown in FIG. 4, the outer elastic bag (16, 17) is provided on the outer surface near the distal end and / or near the proximal end (5) of the mantle tube main body (4). The method is
As in the case of the inner elastic bag (14) shown in FIG. 2, the outer layer (11) and the encapsulant (13) constituting the tube wall of the relevant portion are not adhered and fixed but peeled off. (16, 17) is formed. Further, the elastic part (15) may be applied to this. Then, a gap between the encapsulant (13) and the outer elastic bags (16, 17), that is, the outer elastic bags (16, 17).
One end of a branch pipe (7, 18) serving as a gas-liquid flow passage is opened in 17), and the other end passes through the tube wall of the mantle tube and the base end (5), and then emerges from the end face and branches. I'm separated.

【0033】基端部(5)側の外弾性袋(16)のため
の枝管は、内弾性袋(14)のための枝管(7)と共用
してもよく、また、別個に設けても何ら差しつかえはな
い。共用する場合、螺旋体(12)の必要部位を封入材
(13)で封入せずに、内弾性袋(16)と気液連通す
ることにより容易に製作することができる。一方、先端
部側の外弾性袋(17)のためには枝管(18)を設け
る。各枝管の後端には、図4に示したように、外弾性袋
を膨張、収縮させるための、パイロットバルーン
(8′)と逆止弁(9′)からなる、内弾性袋(14)
のために用いた同様の膨張装置を接続する。
The branch pipe for the outer elastic bag (16) on the base end (5) side may be shared with the branch pipe (7) for the inner elastic bag (14), or provided separately. There is nothing wrong with it. In the case where the spiral body (12) is commonly used, the spiral body (12) can be easily manufactured by being in gas-liquid communication with the inner elastic bag (16) without being sealed with the sealing material (13). On the other hand, a branch pipe (18) is provided for the outer elastic bag (17) on the tip side. At the rear end of each branch pipe, as shown in FIG. 4, an inner elastic bag (14) comprising a pilot balloon (8 ') and a check valve (9') for inflating and deflating the outer elastic bag. )
Connect the same inflation device used for

【0034】套管針を体表より穿刺し目標の位置まで刺
入した後、上記の膨張装置により気体または液体を注入
し、体壁の外側、及び/もしくは体腔内に位置する外弾
性袋(16,17)を膨張させれば、外套管を体壁に固
定することができる。また、外弾性袋(16,17)の
外套管長さ方向の寸法は特に限定されるものではなく、
予め範囲を広くとっておけば、体壁に刺入し留置したと
き、外弾性袋の体壁内に位置する部位は膨張できないの
で、体壁を挟んで前後の部位のみが膨張することにな
り、外套管を任意の位置で留置、固定することができ好
適である。
After the trocar is punctured from the body surface and pierced to the target position, gas or liquid is injected by the above-mentioned inflating device, and the outer elastic bag (outside the body wall and / or inside the body cavity) is injected. By expanding the 16, 16, 17), the mantle tube can be fixed to the body wall. Further, the size of the outer elastic bag (16, 17) in the length direction of the outer tube is not particularly limited, and
If the area is widened in advance, the part of the outer elastic bag located inside the body wall cannot expand when pierced and placed in the body wall, so only the front and rear parts of the body wall between them will expand. It is preferable that the mantle tube can be placed and fixed at an arbitrary position.

【0035】[0035]

【作用】本発明による套管針は、外套管の本体部(4)
に螺旋体(12)を埋込み内蔵して補強された可撓性材
質でできており、その適度な柔軟性と弾力性により屈曲
自在であると共に、刺入に対する必要十分な硬さ及び体
壁留置中の内腔の確実な保持という套管針の必要条件を
満足することができる。
The trocar according to the present invention is a trocar body (4).
Is made of a flexible material reinforced by embedding a helical body (12) therein, and can be bent by its moderate flexibility and elasticity, and has sufficient and sufficient hardness against piercing and body wall placement Trocar requirements for secure retention of the lumen of the trocar.

【0036】また、本体部(4)の管壁を構成する内層
(10)及び外層(11)を部分的に封入材(13)か
ら剥離して隙間を設け、膨張装置から気体または液体を
注入して膨張させることのできる弾性袋を備えている。
これらの内弾性袋(14)の膨出により体腔からの陽圧
ガスの漏出を確実に遮断でききると共に、膨出した弾性
袋が適度な柔軟性と弾力性を有しているため、医療用具
(19)の形状に幅広く適合してその動作に障害となら
ずに気密シールを行なうことができる。
The inner layer (10) and the outer layer (11) constituting the tube wall of the main body (4) are partially peeled off from the encapsulant (13) to provide a gap, and gas or liquid is injected from the expansion device. It has an elastic bag that can be inflated.
The swelling of these inner elastic bags (14) can surely prevent the leakage of the positive pressure gas from the body cavity, and the swelling elastic bags have appropriate flexibility and elasticity. It is possible to seal hermetically without obstructing the operation by widely adapting to the shape of (19).

【0037】更に、外弾性袋(16,17)を利用し
て、体壁刺入口の組織損傷を必要最小限におさえて気密
固定を確実に行なうことができ、かつ外層(11)の剥
離空間位置を自由に設けることができるので、刺入口の
体壁厚み方向の任意の部位で圧迫固定できる套管針を提
供できる。また、これら弾性袋は外套管構成部材を利用
して形成するので不要な内外盛り上りが生じない。
Further, by utilizing the outer elastic bags (16, 17), tissue damage at the puncture of the body wall can be suppressed to a minimum and airtight fixation can be securely performed, and a space where the outer layer (11) is peeled off. Since the position can be freely set, it is possible to provide a trocar that can be pressed and fixed at an arbitrary position in the thickness direction of the puncture port in the body wall. In addition, since these elastic bags are formed using the outer tube constituent members, unnecessary inner and outer bulges do not occur.

【0038】更に、本体部(4)を補強する螺旋体(1
2)の反撥弾性を利用して伸縮部(15)を備えている
ので、体壁貫通直後の針先(1)による臓器損傷を防止
する安全機構を簡便に提供できる。
Further, the spiral body (1) for reinforcing the main body (4)
Since the elastic portion (15) is provided by utilizing the rebound resilience of (2), a safety mechanism for preventing organ damage due to the needle point (1) immediately after penetrating the body wall can be easily provided.

【0039】[0039]

【発明の効果】以上の通り、本発明による套管針を用い
ると、術野に適した種々の弯曲、屈曲した形状の鉗子等
医療器具を、外套管内径の寸法的な制約を受けずに挿入
できるので、手術適応及び使用器具の範囲拡大を可能と
し、手術の安全性と侵襲度の軽減が図れる。また、陽圧
ガスの漏出防止、体壁の気密固定、体壁貫通直後の臓器
損傷防止等、套管針として望ましい機能を比較的簡単な
機構で具備させることができ、内視鏡検査或いは外科的
処置に使用する套管針として有用である。
As described above, by using the trocar according to the present invention, medical instruments such as forceps having various curved and bent shapes suitable for the surgical field can be provided without being restricted by the dimensional restriction of the inner diameter of the outer tube. Since it can be inserted, it is possible to apply for surgery and to expand the range of instruments to be used, and to reduce the safety and invasiveness of surgery. In addition, it is possible to provide a desirable function as a trocar with a relatively simple mechanism, such as prevention of leakage of positive pressure gas, airtight fixation of the body wall, and prevention of organ damage immediately after penetrating the body wall. Useful as a trocar for surgical procedures.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施例となる套管針の全体を示す図
で、(a)は内針の概観図、(b)は外套管の切欠断面
図、(c)は外套管に内針を挿通した状態の概観図であ
る。
FIG. 1 is a view showing the entirety of a trocar according to one embodiment of the present invention, wherein (a) is an overview of an inner needle, (b) is a cutaway sectional view of an outer tube, and (c) is an outer tube. It is an outline view of the state where the inner needle was inserted.

【図2】外套管の基端部近傍の断面図である。FIG. 2 is a cross-sectional view of the vicinity of a base end of a mantle tube.

【図3】本発明の一実施例となる外套管の伸縮部の断面
図、及び作動状態を示す概略図である。
FIG. 3 is a cross-sectional view of a telescopic portion of the mantle tube according to one embodiment of the present invention, and a schematic diagram showing an operating state.

【図4】本発明の一実施例となる外套管の外面に設けた
外弾性袋の概観図である。
FIG. 4 is a schematic view of an outer elastic bag provided on an outer surface of a mantle tube according to an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 針先 2 針本体 3 把手 4 本体部 5 基端部 6 先端チップ 7,18 枝管 8,8′ パイロットバルーン 9,9′ 逆止弁 10 内層 11 外層 12 螺旋体 13 封入材 14 内弾性袋 15 伸縮部 16,17 外弾性袋 19 医療用具 DESCRIPTION OF REFERENCE NUMERALS 1 needle tip 2 needle main body 3 handle 4 main body 5 base end 6 distal tip 7, 18 branch pipe 8, 8 'pilot balloon 9, 9' check valve 10 inner layer 11 outer layer 12 spiral body 13 encapsulating material 14 inner elastic bag 15 Telescopic part 16, 17 Outer elastic bag 19 Medical device

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) A61B 17/34 A61B 1/00 320 A61B 17/02──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) A61B 17/34 A61B 1/00 320 A61B 17/02

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 体壁に刺入、固定される外套管と、該外
套管の内腔に挿脱可能に形成され、先端に穿刺部、後端
に把持部を有する内針とで構成される套管針であって、
前記外套管は、螺旋体で補強された屈曲自在な可撓性の
本体部と、鍔状の基端部から成り、該本体部の基端部近
傍の内面には膨出可能な内弾性袋を設け、基端部近傍の
管壁内には該内弾性袋と気液流通した枝管Aを設け、該
枝管Aは基端部の後面で枝分かれしていることを特徴と
する套管針。
1. An outer tube that is inserted into and fixed to a body wall, and an inner needle that is formed to be insertable into and removable from a lumen of the outer tube and has a puncture portion at a distal end and a grip portion at a rear end. Trocar,
The mantle tube is composed of a bendable flexible main body reinforced with a spiral body and a flange-shaped base end, and an inner elastic bag that can be expanded is provided on the inner surface near the base end of the main body. A trocar, wherein a branch pipe A is provided in the pipe wall near the base end in a gas-liquid communication with the inner elastic bag, and the branch pipe A is branched at a rear surface of the base end. .
【請求項2】 前記外套管本体部の先端部近傍に、管壁
内に内蔵した螺旋体を長さ方向に伸縮可能に形成した伸
縮部を設けたことを特徴とする、請求項1記載の套管
針。
2. A jacket according to claim 1, further comprising an expansion / contraction portion formed near the distal end of said outer tube main body so as to extend and retract in a length direction of a spiral body incorporated in the tube wall. Tube needle.
【請求項3】 前記外套管本体部の先端部近傍及び/も
しくは基端部近傍の外面に、膨出可能な外弾性袋を設
け、本体部の管壁内には該外弾性袋と気液流通した枝管
Bを設け、該枝管Bは基端部の後面で枝分かれしている
ことを特徴とする、請求項1もしくは請求項2記載の套
管針。
3. An inflatable outer elastic bag is provided on the outer surface near the distal end and / or near the proximal end of the outer tube main body, and the outer elastic bag and the gas-liquid are provided in the tube wall of the main body. The trocar according to claim 1 or 2, wherein a circulating branch tube (B) is provided, and the branch tube (B) is branched at a rear surface of a base end portion.
JP4200073A 1992-07-28 1992-07-28 Trocar Expired - Fee Related JP2820571B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4200073A JP2820571B2 (en) 1992-07-28 1992-07-28 Trocar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4200073A JP2820571B2 (en) 1992-07-28 1992-07-28 Trocar

Publications (2)

Publication Number Publication Date
JPH0638972A JPH0638972A (en) 1994-02-15
JP2820571B2 true JP2820571B2 (en) 1998-11-05

Family

ID=16418400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4200073A Expired - Fee Related JP2820571B2 (en) 1992-07-28 1992-07-28 Trocar

Country Status (1)

Country Link
JP (1) JP2820571B2 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2858238B1 (en) * 2003-08-01 2005-09-16 Lebet Alain DEVICE FOR ASSISTING THE PERCUTANEOUS INSTALLATION OF A GUIDE TUBE FOR A NEPHROSCOPE IN KIDNEY SURGERY
JP4573568B2 (en) * 2004-04-30 2010-11-04 オリンパス株式会社 Puncture needle
US7643884B2 (en) * 2005-01-31 2010-01-05 Warsaw Orthopedic, Inc. Electrically insulated surgical needle assembly
JP4875478B2 (en) * 2006-12-04 2012-02-15 オリンパスメディカルシステムズ株式会社 Insertion tool
DE102007036612A1 (en) * 2007-08-02 2009-02-05 Dimatec Analysentechnik Gmbh Injection port for analyzers, arrangement for actuating an injection port and analyzer with an injection port
EP2247335B1 (en) * 2008-03-03 2014-09-03 Applied Medical Resources Corporation Balloon trocar advanced fixation
JP2010004919A (en) * 2008-06-24 2010-01-14 Olympus Corp Medical tube
JP5499927B2 (en) * 2010-06-17 2014-05-21 住友ベークライト株式会社 Overtube
JP2014012043A (en) * 2012-07-03 2014-01-23 Coden Co Ltd Pipe endoscope
KR101434629B1 (en) * 2013-01-30 2014-08-27 주식회사 세종메디칼 Trocar assembly
KR101725235B1 (en) * 2015-12-01 2017-04-11 충남대학교산학협력단 Surgical Trocar
CN108498148B (en) * 2018-06-22 2024-02-13 广东弘和医疗器械制造有限公司 Abdominal cavity tumor crushing and sucking device and method matched with small-sized containing bag
CN111387924B (en) * 2020-03-23 2022-12-02 成都市龙泉驿区第一人民医院 Auxiliary device based on endoscopic surgery is used
KR102526701B1 (en) * 2020-06-02 2023-04-27 인제대학교 산학협력단 Needle assembly for medical devices and medical device comprising the same

Also Published As

Publication number Publication date
JPH0638972A (en) 1994-02-15

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