JP6598155B2 - Vitrectomy instrument - Google Patents
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- JP6598155B2 JP6598155B2 JP2015244733A JP2015244733A JP6598155B2 JP 6598155 B2 JP6598155 B2 JP 6598155B2 JP 2015244733 A JP2015244733 A JP 2015244733A JP 2015244733 A JP2015244733 A JP 2015244733A JP 6598155 B2 JP6598155 B2 JP 6598155B2
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Description
本発明は、眼球内の硝子体を切除する硝子体切除器具に関する。 The present invention relates to a vitrectomy device for resecting a vitreous body in an eyeball.
硝子体を切除する器具として、例えば、特許文献１に開示された硝子体カッターが知られている。この硝子体カッターは、外筒部および内筒部の先端部にそれぞれ開口部が形成されており、内筒部を外筒部に対して回転させることにより、外筒部内に吸引した硝子体を切除するように構成されている。 As an instrument for excising the vitreous body, for example, a vitreous cutter disclosed in Patent Document 1 is known. This vitreous cutter has openings formed at the distal end portions of the outer tube portion and the inner tube portion, and the vitreous body sucked into the outer tube portion is rotated by rotating the inner tube portion with respect to the outer tube portion. It is configured to be excised.
従来の硝子体切除器具は、柔らかい硝子体繊維のような物質の切断が困難であるため、切除する硝子体繊維が多くなると筒内で詰まりが生じるおそれがあった。 Since the conventional vitrectomy device is difficult to cut a material such as soft vitreal fibers, there is a possibility that clogging may occur in the cylinder when the amount of vitreal fibers to be excised increases.
本発明は、硝子体の切除を確実に行うことができる硝子体切除器具の提供を目的とする。 An object of this invention is to provide the vitrectomy instrument which can perform the vitrectomy reliably.
上記目的を達成するため、本発明に係る硝子体切除器具は、In order to achieve the above object, a vitrectomy device according to the present invention comprises:
先端部の外周面に開口部を有する中空の外筒と、 A hollow outer cylinder having an opening on the outer peripheral surface of the tip;
前記外筒内に回転自在に設けられた螺旋状の切断部材とを備え、 A spiral cutting member provided rotatably in the outer cylinder,
前記切断部材の外縁に沿って形成されたエッジ部が前記開口部から露出して硝子体を切断し、前記外筒内に取り込んで基端側に搬送する硝子体切除器具であって、 An edge portion formed along the outer edge of the cutting member is exposed from the opening, cuts the vitreous body, is taken into the outer cylinder and transports to the proximal end side,
前記切断部材は、各ターンの螺旋径が先方に向けて徐々に小さくなるテーパ部を先端部に有し、 The cutting member has a tapered portion at the tip portion where the spiral diameter of each turn gradually decreases toward the tip,
前記テーパ部での螺旋ピッチが、前記テーパ部以外での螺旋ピッチよりも小さい。 The spiral pitch at the tapered portion is smaller than the spiral pitch at other than the tapered portion.
上記目的を達成するため、本発明に係る硝子体切除器具は、In order to achieve the above object, a vitrectomy device according to the present invention comprises:
先端部の外周面に開口部を有する中空の外筒と、 A hollow outer cylinder having an opening on the outer peripheral surface of the tip;
前記外筒内に回転自在に設けられた螺旋状の切断部材と、 A helical cutting member rotatably provided in the outer cylinder;
前記外筒の基端部に固定された本体と、 A main body fixed to a base end portion of the outer cylinder;
を備え、 With
前記切断部材の外縁に沿って形成されたエッジ部が前記開口部から露出して硝子体を切断し、前記外筒内に取り込んで基端側に搬送する硝子体切除器具であって、 An edge portion formed along the outer edge of the cutting member is exposed from the opening, cuts the vitreous body, is taken into the outer cylinder and transports to the proximal end side,
前記本体は、前記切断部材により前記外筒内を搬送された組織を収容する収容室と、前記切断部材に連結された羽根車が配置された回転室とを備え、 The main body includes a storage chamber for storing a tissue transported in the outer cylinder by the cutting member, and a rotation chamber in which an impeller connected to the cutting member is disposed.
前記収容室および前記回転室は吸引部を介して外部と連通しており、前記吸引部から前記収容室および前記回転室を真空吸引することにより、前記切断部材が回転すると共に、前記開口部から硝子体が吸引され、 The storage chamber and the rotation chamber communicate with the outside through a suction portion, and the cutting member rotates by vacuum suction of the storage chamber and the rotation chamber from the suction portion, and from the opening portion. The vitreous is aspirated,
前記切断部材は、各ターンの螺旋径が先方に向けて徐々に小さくなるテーパ部を先端部に有する。 The cutting member has a tapered portion at the tip portion where the spiral diameter of each turn gradually decreases toward the tip.
本発明によれば、硝子体の切除を確実に行うことができる硝子体切除器具を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the vitrectomy instrument which can perform resection of a vitreous body reliably can be provided.
以下、本発明の実施の形態について、添付図面を参照して説明する。図１は、本発明の一実施形態に係る硝子体切除器具の斜視図である。図１に示すように、硝子体切除器具１は、直線状に延びる中空の外筒１０と、外筒１０の基端部に固定された本体２０とを備えており、外筒１０の内部には、後述する切断部材が設けられている。本体２０は、軸方向の中央に括れ状に形成された把持部２１を有しており、施術者が指先で把持部２１を把持して作業を行うことができる。本体２０の基端側には吸引部２２が設けられており、施術時には吸引部２２を真空ポンプ等の真空吸引源（図示せず）に接続して使用する。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of a vitrectomy device according to an embodiment of the present invention. As shown in FIG. 1, the vitrectomy device 1 includes a hollow outer cylinder 10 that extends linearly and a main body 20 that is fixed to a proximal end portion of the outer cylinder 10. Is provided with a cutting member to be described later. The main body 20 has a gripping portion 21 formed in a constricted shape at the center in the axial direction, and a practitioner can perform work by gripping the gripping portion 21 with a fingertip. A suction part 22 is provided on the proximal end side of the main body 20, and the suction part 22 is connected to a vacuum suction source (not shown) such as a vacuum pump during use.
図２は、図１に示す硝子体切除器具の断面図である。また、図３は、図２に示す外筒１０を拡大して示す断面図である。図２および図３に示すように、外筒１０の先端部外周面には、開口部１１が形成されている。開口部１１の開口面は、外筒１０の軸線Ｌに対して傾斜しており、開口部１１の先端部１１ａは、外筒１０の先端を閉塞する剥離部１２に連接されている。剥離部１２は、外筒１０の外径と略同径の半球状であり、先方に向けて膨出するように形成されている。剥離部１２において、開口部１１との連接部１１ａから開口部１１の先方に突出する部分にはすくい面１２ａが形成されており、硝子体手術において、増殖膜の除去などに用いることができる。 FIG. 2 is a cross-sectional view of the vitrectomy device shown in FIG. FIG. 3 is an enlarged sectional view of the outer cylinder 10 shown in FIG. As shown in FIGS. 2 and 3, an opening 11 is formed on the outer peripheral surface of the distal end portion of the outer cylinder 10. The opening surface of the opening portion 11 is inclined with respect to the axis L of the outer cylinder 10, and the distal end portion 11 a of the opening portion 11 is connected to the peeling portion 12 that closes the distal end of the outer tube 10. The peeling portion 12 has a hemispherical shape that is substantially the same diameter as the outer diameter of the outer cylinder 10 and is formed so as to bulge toward the tip. In the peeling portion 12, a rake face 12a is formed at a portion protruding from the connecting portion 11a to the opening portion 11 to the tip of the opening portion 11, and can be used for removing a proliferation membrane in vitreal surgery.
切断部材３０は、軸体３１の外周面に螺旋状に設けられており、硝子体を切断するためのエッジ部３０ａが外縁に形成されている。エッジ部３０ａは、先端側が開口部１１から露出しており、切断部材３０の回転により硝子体を切断する。切断部材３０は、挿入される外筒１０と略同じ軸方向長さを有しており、開口部１１から外筒１０内に取り込まれた硝子体を基端側に向けて搬送する搬送部材としても機能する。なお、切断部材３０の先端とすくい面１２ａとの間には、増殖膜などの膜剥離に障害とならないように隙間が形成されている。 The cutting member 30 is spirally provided on the outer peripheral surface of the shaft body 31, and an edge portion 30a for cutting the vitreous body is formed on the outer edge. The edge portion 30 a is exposed at the tip side from the opening 11, and cuts the vitreous body by the rotation of the cutting member 30. The cutting member 30 has substantially the same axial length as the outer cylinder 10 to be inserted, and serves as a conveying member that conveys the vitreous body taken into the outer cylinder 10 from the opening 11 toward the proximal end side. Also works. Note that a gap is formed between the tip of the cutting member 30 and the rake face 12a so as not to obstruct film peeling such as a growth film.
図３に示すように、切断部材３０の先端部には、各ターンの螺旋径（切断部材３０を軸線Ｌ方向に見たときに、各ターンのエッジ部３０ａにより形成される形状と実質的に同じ円の径）が、先方に向けて徐々に小さくなるテーパ部３０ｂが設けられている。すなわち、テーパ部３０ｂは、最先のターンの螺旋径Ｄ１が最小で、最後のターンの螺旋径Ｄ２が最大となっており、切断部材３０におけるテーパ部３０ｂ以外の各ターンの螺旋径は、Ｄ２のまま一定である。テーパ部３０ｂの軸線Ｌ方向の長さは特に限定されないが、本実施形態では、開口部１１の軸線Ｌ方向の長さに略一致させている。テーパ部３０ｂは、開口部１１よりも外筒１０の基端側まで延びるように形成してもよい。 As shown in FIG. 3, the tip of the cutting member 30 has a spiral diameter of each turn (substantially the shape formed by the edge 30a of each turn when the cutting member 30 is viewed in the axis L direction). A tapered portion 30b is provided in which the diameter of the same circle) gradually decreases toward the tip. That is, the taper portion 30b has the smallest spiral diameter D1 of the earliest turn and the largest spiral diameter D2 of the last turn, and the spiral diameter of each turn other than the taper portion 30b in the cutting member 30 is D2. It remains constant. The length of the taper portion 30b in the axis L direction is not particularly limited, but in the present embodiment, the length of the opening portion 11 is substantially matched with the length of the opening portion 11 in the axis L direction. The tapered portion 30 b may be formed so as to extend to the proximal end side of the outer cylinder 10 with respect to the opening portion 11.
また、切断部材３０は、テーパ部３０ｂでの螺旋ピッチＰ１が、テーパ部以外での螺旋ピッチＰ２よりも小さくなるように形成されている。本実施形態において、テーパ部３０ｂでの螺旋ピッチＰ１は一定としているが、軸方向に変化させてもよい。例えば、テーパ部３０ｂの螺旋ピッチが、基端側から先端側に向けて徐々に小さくなるように形成してもよい。この場合においても、テーパ部３０ｂでの最大の螺旋ピッチが、テーパ部３０ｂ以外での最小の螺旋ピッチよりも小さいことが好ましい。 Further, the cutting member 30 is formed such that the helical pitch P1 at the tapered portion 30b is smaller than the helical pitch P2 other than the tapered portion. In the present embodiment, the helical pitch P1 at the tapered portion 30b is constant, but may be changed in the axial direction. For example, you may form so that the helical pitch of the taper part 30b may become small gradually toward the front end side from a base end side. Even in this case, it is preferable that the maximum helical pitch at the tapered portion 30b is smaller than the minimum helical pitch other than at the tapered portion 30b.
テーパ部３０ｂにおいて、各ターンのエッジ部３０ａにより形成される勾配は、開口部１１の開口面が軸線Ｌに対してなす傾斜角度よりも小さく設定されている。これにより、切断部材３０が開口面１１から突出する部分が先端側ほど多くなり、切断部材３０の主として先端側で硝子体を切断することができる。但し、テーパ部３０ｂのエッジ部３０ａの勾配は、開口部１１の開口面の傾斜角度に一致させてもよく、あるいはこの傾斜角度より大きくしてもよい。テーパ部３０ｂのエッジ部３０ａの勾配は特に限定されないが、例えば、５〜４５°の範囲に設定することができる。 In the taper part 30b, the gradient formed by the edge part 30a of each turn is set smaller than the inclination angle formed by the opening surface of the opening part 11 with respect to the axis L. Thereby, the part which the cutting member 30 protrudes from the opening surface 11 increases so that the front end side can cut | disconnect a vitreous body mainly on the front end side of the cutting member 30. FIG. However, the gradient of the edge part 30a of the taper part 30b may be made to correspond to the inclination angle of the opening surface of the opening part 11, or may be made larger than this inclination angle. Although the gradient of the edge part 30a of the taper part 30b is not specifically limited, For example, it can set to the range of 5-45 degrees.
図２に示すように、本体２０は、切断部材３０により搬送された硝子体を収容する収容室２４と、収容室２４の基端側に配置された回転室２５とを備えている。収容室２４と回転室２５とは隔壁２８により隔離されている。外筒１０内で切断部材３０を支持する軸体３１は、基端側が収容室２４を経て回転室２５まで延びており、軸受２７により回転自在に支持されている。回転室２５には、軸体３１に固定された羽根車２６が配置されており、吸引部２２および導入部２３を介して外部と連通する。外筒１０および軸体３１の材料は特に限定されないが、撓みを生じ難い高剛性材料であることが好ましく、例えば、ジルコニア等のファインセラミックスや、タングステンカーバイド等の超硬合金、ステンレス等の金属材料を挙げることができる。切断部材３０は無軸であってもよく、軸体３１を切断部材３０の基端部に接続した構成にすることもできる。 As shown in FIG. 2, the main body 20 includes a storage chamber 24 that stores the vitreous body conveyed by the cutting member 30, and a rotation chamber 25 that is disposed on the proximal end side of the storage chamber 24. The storage chamber 24 and the rotation chamber 25 are separated by a partition wall 28. The shaft body 31 that supports the cutting member 30 in the outer cylinder 10 has a proximal end extending to the rotation chamber 25 through the storage chamber 24, and is rotatably supported by a bearing 27. An impeller 26 fixed to the shaft body 31 is disposed in the rotation chamber 25 and communicates with the outside through the suction part 22 and the introduction part 23. The material of the outer cylinder 10 and the shaft body 31 is not particularly limited, but is preferably a high-rigidity material that does not easily bend. For example, fine ceramics such as zirconia, cemented carbide such as tungsten carbide, and metal materials such as stainless steel Can be mentioned. The cutting member 30 may be non-axial, and the shaft body 31 may be connected to the proximal end portion of the cutting member 30.
吸引部２２は、本体２０の内部に配置されたチューブ状の吸引流路４０の一端側に接続されている。吸引流路４０の他端側は、収容室２４に臨む外筒１０の基端側近傍まで延びている。吸引流路４０は、回転室２５と多数の通気孔４２を介して連通しており、吸引部２２から真空吸引することにより、導入部２３から外気が導入されて回転室２５に気流が発生し、羽根車２６が軸体３１と共に回転する。 The suction part 22 is connected to one end side of a tube-like suction flow path 40 disposed inside the main body 20. The other end side of the suction channel 40 extends to the vicinity of the proximal end side of the outer cylinder 10 facing the storage chamber 24. The suction flow path 40 communicates with the rotation chamber 25 via a large number of vent holes 42, and vacuum suction from the suction portion 22 introduces outside air from the introduction portion 23 to generate an air flow in the rotation chamber 25. The impeller 26 rotates together with the shaft body 31.
図４は、図２に示す外筒１０の基端部近傍を拡大して示す断面図である。図２および図４に示すように、吸引流路４０の先端には多数の通気孔４１が形成されており、吸引部２２から真空吸引することにより収容室２４が負圧になり、外筒１０の開口部１１から硝子体などが吸引される。通気孔４１は、気体は通過する一方で収容室２４に搬送された硝子体は通過できないような大きさであることが好ましく、例えば通気膜などを使用することもできる。なお、本体２０の把持部２１には外部と連通する補助導入部２１ａが形成されており、施術時には補助導入部２１ａを指などで塞いで使用する。 4 is an enlarged cross-sectional view showing the vicinity of the proximal end portion of the outer cylinder 10 shown in FIG. As shown in FIG. 2 and FIG. 4, a large number of vent holes 41 are formed at the tip of the suction flow path 40, and vacuum is sucked from the suction portion 22, whereby the storage chamber 24 becomes negative pressure and the outer cylinder 10. A vitreous body or the like is sucked from the opening 11. The vent hole 41 is preferably sized so that the gas passes but the vitreous conveyed to the storage chamber 24 cannot pass through. For example, a vent film may be used. Note that an auxiliary introduction part 21a communicating with the outside is formed in the grip part 21 of the main body 20, and the auxiliary introduction part 21a is closed with a finger or the like during treatment.
上記の構成を備える硝子体切除器具１は、吸引部２２に接続した真空源を作動させることにより、外筒１０の開口部１１に吸引力が作用すると共に、切断部材３０が回転する。したがって、外筒１０の先端部を硝子体に押し当てることにより、硝子体が開口部１１から外筒１０の内部に引き込まれ、この状態で切断部材３０が回転することにより硝子体が分断される。分断された硝子体は、開口部１１から外筒１０の内部に取り込まれ、切断部材３０によって基端側に向けて搬送されて、収容室２４に収容される。本実施形態の切断部材３０は、エッジ部３０ａが外縁に沿って全体に形成されており、硝子体が外筒１０の内部を搬送される間も外筒１０の内周面とエッジ部３０ａとの隙間で硝子体を分断することができるので、硝子体を細分化して確実に搬送することができる。但し、エッジ部３０ａは、切断部材３０のテーパ部３０ｂのみに形成することも可能であり、あるいは、切断部材３０が開口部１１から露出する部分のみに形成することも可能である。 In the vitrectomy instrument 1 having the above-described configuration, by operating a vacuum source connected to the suction unit 22, a suction force acts on the opening 11 of the outer cylinder 10 and the cutting member 30 rotates. Therefore, the vitreous body is drawn into the outer cylinder 10 from the opening 11 by pressing the tip of the outer cylinder 10 against the vitreous body, and the vitreous body is divided by rotating the cutting member 30 in this state. . The divided vitreous body is taken into the outer cylinder 10 from the opening 11, conveyed toward the proximal end side by the cutting member 30, and accommodated in the accommodation chamber 24. In the cutting member 30 of the present embodiment, the edge portion 30a is formed entirely along the outer edge, and the inner peripheral surface of the outer tube 10 and the edge portion 30a are also transmitted while the vitreous body is conveyed inside the outer tube 10. Since the vitreous body can be divided by the gap, the vitreous body can be subdivided and reliably conveyed. However, the edge portion 30 a can be formed only on the tapered portion 30 b of the cutting member 30, or can be formed only on a portion where the cutting member 30 is exposed from the opening 11.
本実施形態の切断部材３０は、先端部にテーパ部３０ｂを有することで、外筒１０の内周面と、切断部材３０のエッジ部３０ａとの間に形成される空間が、外筒１０の先端側ほど広くなる。したがって、開口部１１から外筒１０内に取り込まれた硝子体が外筒１０の先端部に滞留し易くなるため、切断部材３０の回転により、テーパ部３０ｂのエッジ部３０ａで硝子体を繰り返し切断してから、基端側に搬送することができる。更に、開口部１１の近傍で切断された硝子体は、テーパ部３０ｂのエッジ部３０ａが形成する勾配によって外筒１０の先端側に案内されるため、上述した外筒１０の先端部における硝子体の滞留が促される。こうして、硝子体を細かく分断して搬送することができるので、硝子体の搬送に伴う外筒１０の詰まりを防止して、硝子体の切除を確実に行うことができる。 The cutting member 30 of the present embodiment has a tapered portion 30 b at the tip, so that a space formed between the inner peripheral surface of the outer cylinder 10 and the edge portion 30 a of the cutting member 30 is the outer cylinder 10. The tip side becomes wider. Therefore, since the vitreous body taken into the outer cylinder 10 from the opening 11 is likely to stay at the tip of the outer cylinder 10, the vitreous body is repeatedly cut at the edge portion 30a of the tapered portion 30b by the rotation of the cutting member 30. Then, it can be conveyed to the base end side. Furthermore, since the vitreous body cut in the vicinity of the opening 11 is guided to the distal end side of the outer cylinder 10 by the gradient formed by the edge portion 30a of the tapered portion 30b, the vitreous body at the distal end portion of the outer cylinder 10 described above. Is encouraged. Thus, since the vitreous body can be divided and transported, the clogging of the outer cylinder 10 accompanying the transport of the vitreous body can be prevented, and the vitreous body can be cut off reliably.
また、テーパ部３０ｂでの螺旋ピッチＰ１を、前記テーパ部３０ｂ以外での螺旋ピッチＰ２よりも小さくすることで、テーパ部３０ｂにおいてはエッジ部３０ａによる硝子体の細分化を促しつつ、テーパ部３０ｂ以外では、硝子体の広い搬送空間を確保することができる。したがって、搬送中の硝子体による外筒１０の詰まりをより確実に防止することができる。 Further, by reducing the helical pitch P1 at the tapered portion 30b to be smaller than the helical pitch P2 other than the tapered portion 30b, the tapered portion 30b promotes the subdivision of the vitreous body by the edge portion 30a. In other cases, a wide conveyance space of the vitreous body can be secured. Therefore, clogging of the outer cylinder 10 due to the vitreous body being conveyed can be prevented more reliably.
また、本体２０が、切断部材３０により外筒１０内を搬送された組織を収容する収容室２４と、切断部材３０に軸体３１を介して連結された羽根車２６が配置された回転室２５とを備えており、収容室２４および回転室２５は、吸引流路４０介して接続された吸引部２２を介して外部と連通しているので、吸引部２２から収容室２４および回転室２５を真空吸引することにより、切断部材３０を回転させると共に、開口部１１から組織を吸引することができる。したがって、切断部材３０の駆動源として電動モータ等を使用した場合の振動の発生を防止することができ、硝子体の除去を容易且つ正確に行うことができる。 The main body 20 has a storage chamber 24 for storing the tissue conveyed through the outer cylinder 10 by the cutting member 30, and a rotating chamber 25 in which an impeller 26 connected to the cutting member 30 via a shaft 31 is disposed. Since the storage chamber 24 and the rotation chamber 25 communicate with the outside through the suction portion 22 connected via the suction flow path 40, the storage chamber 24 and the rotation chamber 25 are connected from the suction portion 22. By vacuum suction, the cutting member 30 can be rotated and tissue can be sucked from the opening 11. Therefore, it is possible to prevent the occurrence of vibration when an electric motor or the like is used as the drive source of the cutting member 30, and the vitreous body can be removed easily and accurately.
また、本実施形態の上記構成によれば、外筒１０内を搬送される硝子体が多量になって開口部１１からの吸引力が低下すると、これに応じて回転室２５内の気流の流速が高くなり、羽根車２６の回転数が増加するため、切断部材３０による搬送能力を高めることができる。したがって、分断した硝子体の搬送を確実に行うことができる。 Moreover, according to the said structure of this embodiment, when the vitreous body conveyed in the outer cylinder 10 becomes large and the attraction | suction force from the opening part 11 falls, according to this, the flow velocity of the air current in the rotation chamber 25 is reduced. And the rotational speed of the impeller 26 is increased, so that the conveying capability of the cutting member 30 can be increased. Therefore, the divided vitreous body can be reliably conveyed.
本実施形態の切断部材３０は、開口部１１から露出するエッジ部３０ａが開口部１１の開口面から外部に突出しており、これによって硝子体を確実に切断できるように構成しているが、切断対象となる硝子体は、開口部１１からの吸引によって外筒１０内に引き込まれるため、開口部３０ａから露出するエッジ部３０ａが開口部１１の開口面から突出しない構成であってもよい。 The cutting member 30 of the present embodiment is configured so that the edge portion 30a exposed from the opening portion 11 protrudes outward from the opening surface of the opening portion 11 so that the vitreous body can be cut reliably. Since the target vitreous body is drawn into the outer cylinder 10 by suction from the opening portion 11, the edge portion 30 a exposed from the opening portion 30 a may not protrude from the opening surface of the opening portion 11.
１ 硝子体切除器具
１０ 外筒
１１ 開口部
１１ａ 先端部
１２ 剥離部
１２ａ すくい面
２０ 本体
２１ 把持部
３０ 切断部材
３０ａ エッジ部
３０ｂ テーパ部
DESCRIPTION OF SYMBOLS 1 Vitreous body excision instrument 10 Outer cylinder 11 Opening part 11a Tip part 12 Peeling part 12a Rake face 20 Main body 21 Holding part 30 Cutting member 30a Edge part 30b Tapered part
Claims (3)
前記外筒内に回転自在に設けられた螺旋状の切断部材とを備え、
前記切断部材の外縁に沿って形成されたエッジ部が前記開口部から露出して硝子体を切断し、前記外筒内に取り込んで基端側に搬送する硝子体切除器具であって、
前記切断部材は、各ターンの螺旋径が先方に向けて徐々に小さくなるテーパ部を先端部に有し、
前記テーパ部での螺旋ピッチが、前記テーパ部以外での螺旋ピッチよりも小さい硝子体切除器具。 A hollow outer cylinder having an opening on the outer peripheral surface of the tip;
A spiral cutting member provided rotatably in the outer cylinder,
An edge portion formed along the outer edge of the cutting member is exposed from the opening, cuts the vitreous body, is taken into the outer cylinder and transports to the proximal end side,
The cutting member may have a tapered portion in which the helical diameter of each turn is gradually reduced toward the other party to the tip,
A vitreous resection instrument in which the helical pitch at the tapered portion is smaller than the helical pitch at other than the tapered portion .
前記本体は、前記切断部材により前記外筒内を搬送された組織を収容する収容室と、前記切断部材に連結された羽根車が配置された回転室とを備え、
前記収容室および前記回転室は吸引部を介して外部と連通しており、前記吸引部から前記収容室および前記回転室を真空吸引することにより、前記切断部材が回転すると共に、前記開口部から硝子体が吸引される請求項１に記載の硝子体切除器具。 A main body fixed to the base end of the outer cylinder;
The main body includes a storage chamber for storing a tissue transported in the outer cylinder by the cutting member, and a rotation chamber in which an impeller connected to the cutting member is disposed.
The storage chamber and the rotation chamber communicate with the outside through a suction portion, and the cutting member rotates by vacuum suction of the storage chamber and the rotation chamber from the suction portion, and from the opening portion. The vitrectomy device according to claim 1 , wherein the vitreous body is aspirated.
前記外筒内に回転自在に設けられた螺旋状の切断部材と、
前記外筒の基端部に固定された本体と、
を備え、
前記切断部材の外縁に沿って形成されたエッジ部が前記開口部から露出して硝子体を切断し、前記外筒内に取り込んで基端側に搬送する硝子体切除器具であって、
前記本体は、前記切断部材により前記外筒内を搬送された組織を収容する収容室と、前記切断部材に連結された羽根車が配置された回転室とを備え、
前記収容室および前記回転室は吸引部を介して外部と連通しており、前記吸引部から前記収容室および前記回転室を真空吸引することにより、前記切断部材が回転すると共に、前記開口部から硝子体が吸引され、
前記切断部材は、各ターンの螺旋径が先方に向けて徐々に小さくなるテーパ部を先端部に有する硝子体切除器具。 A hollow outer cylinder having an opening on the outer peripheral surface of the tip;
A helical cutting member rotatably provided in the outer cylinder;
A main body fixed to a base end portion of the outer cylinder ;
With
An edge portion formed along the outer edge of the cutting member is exposed from the opening, cuts the vitreous body, is taken into the outer cylinder and transports to the proximal end side,
The main body includes a storage chamber for storing a tissue transported in the outer cylinder by the cutting member, and a rotation chamber in which an impeller connected to the cutting member is disposed.
The storage chamber and the rotation chamber communicate with the outside through a suction portion, and the cutting member rotates by vacuum suction of the storage chamber and the rotation chamber from the suction portion, and from the opening portion. The vitreous is aspirated ,
It said cutting member, vitrectomy instrument that having a tapered portion in which the helical diameter of each turn is gradually decreased toward the other party to the tip.
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| JP2015244733A JP6598155B2 (en) | 2015-12-16 | 2015-12-16 | Vitrectomy instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2015244733A JP6598155B2 (en) | 2015-12-16 | 2015-12-16 | Vitrectomy instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3945375A (en) * | 1972-04-04 | 1976-03-23 | Surgical Design Corporation | Rotatable surgical instrument |
| US5437678A (en) * | 1992-11-30 | 1995-08-01 | Neomedix Corporation | Ophthalmic lens removal method and apparatus |
| JPH08266546A (en) * | 1995-03-30 | 1996-10-15 | Morita Mfg Co Ltd | Suction device for medical treatment |
| JP2005185427A (en) * | 2003-12-25 | 2005-07-14 | Takashima Sangyo Kk | Vitreous body cutter, vitreous body surgery apparatus with vitreous body cutter, and vitreous body cutter production method |
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