JP2015164643A - Fluid injection device and fluid injection part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid injection device capable of injecting fluid to a correct surgical site and a medical device.SOLUTION: A fluid injection device includes: a pulsation generation part 20 for converting fluid to a pulsation flow; a suction tube 80 protrudingly mounted to the pulsation generation part 20; a fluid injection tube 70 which is eccentrically inserted into the suction tube 80 so that the outer peripheral surface is in contact with the inner peripheral surface of the suction tube 80, and which has a fluid injection opening 72 communicated with the pulsation generation part 20; a suction flow passage 81 formed between the inner peripheral surface of the suction tube 80 and the outer peripheral surface of the fluid injection tube 70; a suction opening 82; a light source 91; and a light guiding member 100 provided to the outer peripheral surface of the suction tube 80 for guiding light emitted by the light source 91. The fluid injection tube 70 is fixed to the inner peripheral surface of the suction tube 80 in the neighborhood of the fluid injection opening 72, and the light guided by the light guiding member 100 to the neighborhood of the fluid injection opening 72 indicates a place on the outer peripheral surface of the suction tube 80 where the fluid is injected.

Description

  The present invention relates to a fluid ejection device having a fluid ejection tube and a suction tube, and a medical device.

  A method of excising, incising, and crushing a living tissue using a fluid ejecting apparatus has excellent characteristics as a surgical tool, such as being free from thermal damage and capable of preserving tubule tissue such as blood vessels. When an operation or the like is performed using such a fluid ejecting apparatus, the ejected fluid, the excised tissue, or the like may accumulate in the surgical site and a visual field may not be secured. For this purpose, there is an apparatus equipped with a suction tube for sucking and removing fluid and excised tissue.

  As an example of such a fluid ejecting apparatus, a fluid ejecting pipe that ejects high-pressure fluid is disposed in the suction flow path of the suction pipe so as to be concentric with the suction flow path. (For example, refer to Patent Document 1).

  As another example, a fluid ejecting apparatus in which a fluid ejecting pipe for ejecting a high-pressure fluid is inserted in a state of being eccentric with respect to the inner peripheral surface of the suction pipe has been proposed (for example, Patent Document 2). reference).

  In addition, there is a fluid ejecting apparatus that rapidly changes the volume of a fluid chamber by volume changing means to convert the fluid into a pulsating flow, and ejects the fluid at a high speed in a pulsed manner from a fluid ejecting opening (see, for example, Patent Document 3).

Japanese Patent Laid-Open No. 1-313047 JP-A-6-90957 JP 2008-82202 A

  In Patent Document 1 described above, since the inner peripheral surface of the suction tube and the outer peripheral surface of the fluid ejection tube are arranged concentrically, the size of the suction flow path of the suction opening (the inner periphery of the suction tube) The gap dimension between the surface and the outer peripheral surface of the fluid ejection tube is ½ of the difference between the inner diameter of the suction tube and the outer diameter of the fluid ejection tube. It is difficult to aspirate and remove excised tissue larger than this size. is there. In addition, if the diameter of the suction tube is increased in order to ensure the size of the suction channel, there is a problem that the surgical field of view is narrowed.

  Further, in Patent Document 2, since the fluid ejection tube is inserted in a state of being eccentric to the inner peripheral surface of the suction tube, the size of the excisable tissue that can be sucked is the inner diameter of the suction tube and the fluid ejection tube. When the suction pipe and the fluid ejection pipe having the same diameter as those in Patent Document 1 are used, the difference is greater than that in the case of concentricity. However, when high-pressure fluid is ejected, vibration may occur near the tip of the fluid ejection tube, that is, in the vicinity of the fluid ejection opening, making it difficult to eject the fluid to the target surgical site.

  Further, as in Patent Document 2, in the configuration in which the fluid ejection tube is eccentrically inserted into the suction tube and inserted, the position of the fluid ejection opening cannot be directly recognized, so that it is difficult to eject the fluid to the correct surgical site position. There is also.

  In addition, the fluid ejecting apparatus according to Patent Document 3 can be excised with a smaller flow rate than that of the above-described Patent Document 1 or Patent Document 2 in which the high-pressure fluid is ejected in a continuous flow, but in order to improve the visibility of the surgical site. Alternatively, it may be required to provide a suction tube for removing the excised tissue by suction. In such a case, in order to enlarge the suction channel, it is possible to employ a structure in which the fluid ejection pipe is inserted in a state of being eccentric with respect to the inner peripheral surface of the suction pipe as in Patent Document 2. . However, when the fluid is ejected in a pulse shape, the vibration of the fluid ejection tube is expected to be larger than that of the continuous flow ejection.

  As described above, when vibration occurs in the fluid ejecting pipe, the fluid ejecting pipe and the suction pipe come into contact with each other to generate an abnormal sound, and the suction is caused by the vibration of the tip (fluid ejecting opening) of the fluid ejecting pipe. The tube resonates, making it difficult to eject fluid to the surgical site.

  Further, in each of the fluid ejection devices according to Patent Document 1, Patent Document 2, and Patent Document 3, the fluid ejection opening is configured with a very small hole with respect to the diameter of the suction pipe in order to increase the ejection pressure. For this reason, the fluid ejection opening is behind the suction tube and cannot be directly visually recognized, making it difficult to eject the fluid to the correct surgical site position.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A fluid ejection device according to this application example includes a pulsation generator that generates a pulsating flow of fluid, a suction pipe that projects from the pulsation generator, and communicates with the pulsation generator. It has a fluid ejection opening to be ejected, is eccentrically inserted so that the outer peripheral surface is in contact with the inner peripheral surface of the suction tube, and is fixed to the inner peripheral surface of the suction tube in the vicinity of the fluid ejection opening And a light source that emits light, and a light guide member that is provided on an outer peripheral surface of the suction tube and guides the light emitted from the light source to the vicinity of the fluid ejection opening. .

  According to this application example, since the fluid ejection tube is inserted in a state where the fluid ejection tube is eccentric to the suction tube, the size of the suction channel is the difference between the inner diameter of the suction tube and the outer diameter of the fluid ejection tube. Become. For example, if the inner diameter of the suction pipe is d1 and the outer diameter of the fluid ejection pipe is d2, the suction flow path size (gap size) is d1-d2, and the suction pipe and the fluid ejection pipe are concentric. The size of the suction channel is (d1-d2) / 2. Therefore, the size of the suction channel when eccentric is larger than the size of the suction channel when concentric. Therefore, when the fluid ejection tube and the suction tube are decentered, a larger excised tissue can be aspirated than when concentric, and the amount of ejected drainage is increased, resulting in a good surgical field of view. .

  In addition, since the fluid ejection pipe is fixed to the inner peripheral surface of the suction pipe in the vicinity of the fluid ejection opening, the vibration of the tip of the fluid ejection pipe is suppressed, and the fluid ejection pipe and the suction pipe are in contact with each other. The tip of the fluid ejection tube (fluid ejection opening) does not move due to vibration, and the suction tube is prevented from resonating due to this vibration. Fluid can be ejected.

  Furthermore, since the light guided to the vicinity of the fluid ejection opening by the light guide member substantially coincides with the trajectory of the fluid ejected from the fluid ejection opening, it is hidden by the suction pipe and directly visible. Even if this is not possible, the fluid can be ejected to a substantially accurate surgical site position.

  Application Example 2 In the fluid ejecting apparatus according to the application example, it is preferable that the light source is disposed to face a light incident surface of the light guide member.

  By arranging the light source so as to face the light incident surface of the light guide member, the light of the light source is efficiently incident on the light guide member, so that the amount of light irradiated from the light exit surface of the light guide member is increased. It is possible to more clearly indicate the location of the surgical site where the ejected fluid hits.

  Application Example 3 In the fluid ejecting apparatus according to the application example, the light source is a laser.

  The light emitted by the laser is excellent in directivity and convergence, and is a light beam with a small divergence angle, so that light can be efficiently taken into a light guide member with a small aperture.

  Application Example 4 A medical device according to this application example includes the fluid ejection device described above.

  According to this, by providing the medical device with the fluid ejecting apparatus of the present invention, it is possible to receive the same effects as the various effects enjoyed by the fluid ejecting apparatus. That is, for this reason, incision of living tissue that can enjoy the same effects as the various effects enjoyed by the fluid ejecting apparatus of the present invention described above, in addition to crushing stones and the like, introducing fluid into living cells, blood vessels Various medical devices such as removal of internal embolism can be realized.

The structure explanatory view showing the fluid ejecting device as a surgical instrument concerning this embodiment. Sectional drawing which shows the cut surface which cut | disconnected the pulsation generation | occurrence | production part which concerns on 1st Example, the fluid ejection pipe, and the suction pipe along the ejection direction of a fluid. It is sectional drawing which shows the AA cut surface of FIG. 2, (A) is 1st Example, (B) is sectional drawing which shows a prior art example. The fragmentary sectional view which shows the structure of the fluid injection pipe and suction pipe which concern on 2nd Example. The fragmentary sectional view which shows the structure of the fluid injection pipe and suction pipe which concern on 3rd Example. The fragmentary sectional view which shows the structure of the fluid injection pipe and suction pipe which concern on 4th Example. The fragmentary sectional view which shows the structure of the fluid injection pipe and suction pipe which concern on 5th Example. The fragmentary sectional view which shows the structure of the fluid injection pipe and suction pipe which concern on 6th Example.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the drawings referred to in the following description are schematic views in which the vertical and horizontal scales of members or portions are different from actual ones for convenience of illustration.

  FIG. 1 is a configuration explanatory view showing a fluid ejection device as a surgical instrument according to the present embodiment. Therefore, the fluid described below is physiological saline. In FIG. 1, the fluid ejecting apparatus 1 may be expressed as a pulsating flow (hereinafter referred to as a pulse flow) from a fluid container 2 that contains a fluid, a supply pump 10 as a fluid supply means, and a fluid supplied from the supply pump 10. ), A fluid ejection pipe 70 communicating with the pulsation generation part 20, a suction pipe 80 projecting from the pulsation generation part 20, a suction pump 11 as a suction means, It is comprised from the collection | recovery container 3 which accommodates a liquid and excised tissue, the light source device 90, and the light guide member 100. FIG. The supply pump 10 and the fluid container 2 are connected by a first connection tube 4a. The pulsation generator 20 and the supply pump 10 are connected by the second connection tube 4b. Further, the suction pipe 80, the suction pump 11, and the collection container 3 are connected by the third connection tube 5. A light guide member 100 is connected to the light source device 90, and the light guide member 100 is guided to the vicinity of the fluid ejection opening 72 along the suction tube 80.

  The pulsation generator 20 can be adapted to any method capable of converting a fluid into a pulsating flow and ejecting it in a pulsed manner, such as a piezo method using a piezoelectric element or a bubble jet (registered trademark) method. However, the pulsation generator 20 described below will be described by exemplifying a piezo method.

  The fluid ejection pipe 70 has a fluid ejection channel 71 that communicates with a fluid chamber 60 formed inside the pulsation generator 20, and a fluid ejection opening 72 having a reduced channel is opened at the tip. Yes.

  The fluid ejection pipe 70 is eccentrically inserted into the suction pipe 80 so that the outer peripheral surface is in contact with the inner peripheral face of the suction pipe 80. The fluid ejection pipe 70 is fixed to the inner peripheral surface of the suction pipe 80 in the vicinity of the fluid ejection opening 72 by a fixing means such as adhesion. A suction channel 81 is a gap formed between the inner peripheral surface of the suction pipe 80 and the outer peripheral surface of the fluid ejection pipe 70. A suction opening 82 is opened at the tip of the suction tube 80. It is desirable that the fluid ejection pipe 70 has a rigidity that does not deform during fluid ejection, and the suction pipe 80 has a higher rigidity than the fluid ejection pipe 70.

  Next, the flow of fluid in the fluid ejecting apparatus 1 configured as described above will be briefly described. The fluid stored in the fluid container 2 is sucked by the supply pump 10 and supplied to the pulsation generator 20 through the second connection tube 4b at a constant pressure. The pulsation generator 20 includes a fluid chamber 60, a piezoelectric element 30 as a volume changing unit that changes the volume of the fluid chamber 60, and a diaphragm 40. The fluid chamber 60 is driven by driving the piezoelectric element 30. A pulsating flow is generated inside, and the fluid is ejected from the fluid ejection opening 72 through the fluid ejection channel 71 at high speed in a pulsed manner.

  When the pulsation generating unit 20 stops driving, that is, when the volume of the fluid chamber 60 is not changed, the fluid supplied from the supply pump 10 at a constant pressure passes through the fluid chamber 60 and passes through the fluid ejection opening. The continuous flow is ejected from the section 72.

  Here, the pulsating flow means a fluid flow in which the fluid flow direction is constant and the fluid flow rate or flow velocity is periodically or irregularly changed. Although the pulsating flow includes an intermittent flow in which the fluid flows and stops repeatedly, the flow rate or flow velocity of the fluid only needs to fluctuate periodically or irregularly. Therefore, the pulsating flow is not necessarily an intermittent flow.

  Similarly, ejecting fluid in a pulsed manner means ejecting fluid in which the flow rate or moving speed of the fluid to be ejected varies periodically or irregularly. An example of pulsed injection is intermittent injection in which fluid injection and non-injection are repeated. However, since the flow rate or moving speed of the fluid to be injected only needs to fluctuate periodically or irregularly, it is not always intermittent injection. Need not be.

  Next, suction will be described. The fluid ejected from the fluid ejection opening 72 stays as drainage at the surgical site. In addition, resected living tissue exists in the surgical site. These drainage and excised tissue are sucked by the suction pump 11 and are stored in the collection container 3 from the suction opening 82 via the suction flow path 81 and the third connection tube 5. The driving of the suction pump 11 may be interlocked with the driving of the pulsation generator 20 or may be intermittently driven periodically.

  Next, light irradiation will be described. The light source device 90 has a light source 91 (see FIG. 2). As the light source 91, a laser, an LED, a halogen lamp, or the like can be used as long as it can emit visible light. The light guide member 100 has a light incident surface 101 (see FIG. 2) and a light exit surface 102 (see FIG. 2). Light emitted from the light source 91 is incident from the light incident surface 101 and guided. The light passes through the light member 100 and is emitted from the light exit surface 102. As the light guide member 100, an optical fiber, a transparent rod, or the like can be adapted. The light incident from the light incident surface 101 is preferably a parallel light beam.

Note that several shapes and structures of the fluid ejection pipe 70 and the suction pipe 80 can be considered. Therefore, they will be described as specific embodiments with reference to the drawings.
(First embodiment)

First, the first embodiment will be described.
FIG. 2 is a cross-sectional view showing a cut surface obtained by cutting the pulsation generator 20, the fluid ejection pipe 70, and the suction pipe 80 according to the present embodiment along the fluid ejection direction. The pulsation generator 20 includes an inlet channel 61 that supplies fluid from the supply pump 10 to the fluid chamber 60 via the second connection tube 4b, a piezoelectric element 30 that serves as a volume changing unit that changes the volume of the fluid chamber 60, and a diaphragm. 40 and an outlet channel 62 communicating with the fluid chamber 60.

  The diaphragm 40 is made of a disk-shaped metal thin plate, and is tightly fixed by a first case 50 and a second case 52. In this embodiment, the piezoelectric element 30 is an example of a laminated piezoelectric element, and one of both end portions is fixed to the diaphragm 40 via the reinforcing plate 35 and the other is fixed to the third case 51.

  The fluid chamber 60 is a space formed by a recess formed on the surface of the second case 52 facing the diaphragm 40 and the diaphragm 40. An outlet channel 62 is opened at a substantially central portion of the fluid chamber 60.

  The second case 52 and the first case 50 are joined and integrated on the surfaces facing each other (in FIG. 2, the diaphragm 40 is interposed). A fluid ejection pipe 70 having a fluid ejection flow path 71 communicating with the outlet flow path 62 is fitted into the second case 52, and a fluid ejection opening 72 having a reduced flow path diameter is provided at the tip of the fluid ejection pipe 70. Is formed. The fluid ejection opening 72 may be configured with a nozzle.

  The second case 52 is provided with a suction pipe 80 as an outer tube of the fluid ejection pipe 70. In the vicinity of the proximal end of the suction pipe 80 on the pulsation generating unit 20 side, an opening 83 that penetrates the side wall is opened, and the third connection tube 5 is attached so as to communicate with the opening 83. In addition, since an operator grasps and operates the pulsation generation | occurrence | production part 20, the extending direction of the 3rd connection tube 5 vicinity of the pulsation generation | occurrence | production part 20 is made into the same direction as the 2nd connection tube 4b, and operativity is carried out. Can be improved.

  As shown in the figure, the fluid ejection pipe 70 is inserted into the suction pipe 80 in an eccentric state. Therefore, the outer peripheral surface of the fluid ejection tube 70 and the inner peripheral surface of the suction tube 80 are in contact with each other within the length of the suction tube 80 or have a small gap. This state will be described with reference to FIG.

  3A and 3B are cross-sectional views showing the AA cut surface of FIG. 2, in which FIG. 3A shows this example and FIG. 3B shows a conventional example. As shown in FIG. 3A, the outer peripheral surface of the fluid ejection tube 70 and the inner peripheral surface of the suction tube 80 are in contact with each other. A gap between the flow path of the suction pipe 80 and the outer peripheral surface of the fluid ejection pipe 70 formed in this way is the suction flow path 81, where the flow path diameter of the suction pipe 80 is d1, and the outer diameter of the fluid ejection pipe 70 is When d2, (d1-d2) is the maximum size of the suction flow path 81.

  By the way, in patent document 1, as shown to FIG. 3 (B), the fluid injection pipe 70 is inserted so that it may become concentric with the suction pipe 80. FIG. In such a case, the maximum size of the suction channel 81 is (d1-d2) / 2, and the size of the suction channel 81 is eccentric even if the total area of the suction channel 81 is the same. This embodiment is larger. The size of the suction opening 82 is the same as that of the suction channel 81.

  In this embodiment, the outer peripheral surface of the fluid ejection tube 70 is in contact with the inner peripheral surface of the suction tube 80. In such a structure, the fluid ejecting pipe 70 is inserted into the suction pipe 80 and fixed with an adhesive or the like in a state where the inner peripheral surface of the suction pipe 80 and the outer peripheral surface of the fluid ejecting pipe 70 are in contact with each other. If it is press-fitted into the second case 52, it can be assembled. At this time, as shown in FIG. 2, the second case 52 side base end portion of the fluid ejection pipe 70 protrudes from the base end portion of the suction pipe 80 and is press-fitted into the second case 52. What is necessary is just to fix with the adhesive etc. in the relationship of the case 52 with a play. In order to fix the fluid ejection pipe 70 and the suction pipe 80 to the second case 52, it is desirable to perform sealing reinforcement with an adhesive, a brazing agent, or the like.

  Note that the fluid ejection pipe 70 and the suction pipe 80 are preferably fixed over the entire contact range in the longitudinal direction, but at least near the tip of the fluid ejection opening 72 (the range shown in FIG. 2 and B). Fix it. In this case, after inserting the fluid ejection tube 70 and the suction tube 80 in this order into the second case 52, the range B shown in FIG. 2 is adhered and fixed with an adhesive, a brazing agent, or a fixing means such as welding. Use and fix.

  In addition, the size of the flow path of the opening 83 and the third connection tube 5 provided in the suction pipe 80 is the same as the flow path cross-sectional area of the suction opening 82 or from the flow path cross-sectional area of the suction opening 82. It is desirable to increase the size.

  Next, the pulse flow ejection operation of the pulsation generator 20 in the present embodiment will be described with reference to FIGS. A fluid is supplied to the inlet channel 61 by the supply pump 10 at a constant pressure. The fluid supply amount from the supply pump 10 may be an amount that is substantially equal to the pulse flow ejection amount from the fluid ejection opening 72. Here, when the piezoelectric element 30 does not operate, the fluid flows into the fluid chamber 60 due to the difference between the injection force of the supply pump 10 and the flow path resistance on the entire inlet flow path 61 side.

  When a drive signal is input to the piezoelectric element 30 and the piezoelectric element 30 rapidly expands in a direction perpendicular to the surface of the diaphragm 40 on the fluid chamber 60 side, the volume of the fluid chamber 60 is reduced, and the pressure in the fluid chamber 60 is It rises rapidly and reaches several tens of atmospheres.

  At this time, since the increase amount of the fluid ejected from the outlet channel 62 is larger than the decrease amount of the flow rate of the fluid flowing into the fluid chamber 60 from the inlet channel 61, a pulsating flow is generated in the fluid ejection channel 71. To do. The pressure fluctuation at the time of jetting propagates through the fluid jet pipe 70, and pulsed fluid is jetted from the fluid jet opening 72 at the tip at a high speed.

  Next, the light source device 90 and the light guide member 100 will be described with reference to FIG. In this embodiment, a semiconductor laser is used as the light source 91. Laser light is excellent in directivity and convergence, and light emitted from a semiconductor laser is generally a parallel light beam. Therefore, the light emitted by the semiconductor laser is excellent in directivity and convergence, and is a light beam having a small divergence angle, so that the light can be efficiently taken into the light guide member 100 having a small aperture. The light source 91 is disposed so as to face the light incident surface 101 of the light guide member 100. The light emitted from the light source 91 enters the light guide member 100 from the light incident surface 101 substantially perpendicularly, passes through the light guide member 100, and is ejected from the light exit surface 102. The part hits the part. Therefore, since the light from the light source 91 is efficiently incident on the light guide member 100, the amount of light irradiated from the light exit surface 102 of the light guide member 100 can be increased, and the surgical part where the ejected fluid hits. Can be shown more clearly.

  According to the present embodiment described above, since the fluid ejection pipe 70 is inserted with the suction pipe 80 being eccentric, the sizes of the suction flow path 81 and the suction opening 82 are the same as those of the suction pipe 80. This is the difference between the inner diameter and the outer diameter of the fluid ejection pipe 70. Therefore, the size of the suction channel 81 and the suction opening 82 when eccentric is larger than the size when concentric. Therefore, when the fluid ejection tube 70 and the suction tube 80 are decentered, a larger excised tissue can be aspirated than in the case of concentricity, the amount of ejected drainage can be increased, and a good surgical field can be obtained. Is obtained.

  Further, since the fluid ejection pipe 70 is fixed to the inner peripheral surface of the suction pipe 80 in the vicinity of the fluid ejection opening 72, the tip end portion of the fluid ejection pipe 70 caused by ejection of the pulse flow vibrates, and this vibration Therefore, it is possible to prevent abnormal sound from being generated due to the fluid ejecting pipe 70 and the suction pipe 80 hitting each other. Further, the tip of the fluid ejection tube 70 (fluid ejection opening 72) vibrates, and the suction tube 80 is prevented from resonating due to this vibration, and the location where the ejected fluid hits the surgical site is indicated by light. The fluid can be ejected accurately.

  Furthermore, since the light guided to the vicinity of the fluid ejection opening 72 by the light guide member 100 substantially coincides with the trajectory of the fluid ejected from the fluid ejection opening 72, it is hidden by the suction pipe 80 and the fluid ejection opening. Even if it is not possible to visually recognize the fluid directly, it is possible to eject the fluid to a substantially accurate surgical site position.

In the present embodiment, the structure in which the suction tube 80 is fixed to the second case 52 is illustrated, but the second case 52 may be protruded to form the suction tube 80. Further, although the arrangement position and the extending direction of the third connection tube 5 are not particularly limited, the operator grasps and operates the pulsation generation unit 20, so in the vicinity of the pulsation generation unit 20, By extending the second connecting tube 4b so as to be along each other, the balance when operating is improved, and the operability can be improved.
(Second embodiment)

  Next, a second embodiment will be described with reference to the drawings. In this embodiment, the first embodiment described above has the fluid ejection pipe 70 and the suction pipe 80 eccentric to the entire length, whereas the base end is concentric and the tip is eccentric. It is characterized by. Therefore, the same reference numerals as those in the first embodiment are used for explanation, focusing on the differences from the first embodiment.

  FIG. 4 is a partial cross-sectional view showing the structure of the fluid ejection pipe 70 and the suction pipe 80 according to the present embodiment. The suction pipe 80 is press-fitted and fixed to the second case 52 at the base end. The base end portion of the fluid ejection pipe 70 is press-fitted and fixed to the second case 52 so as to be concentric with the suction pipe 80. The fluid ejection pipe 70 and the suction pipe 80 are fixed with an adhesive, a brazing agent, or the like using a fixing means such as welding or the like at the distal end (range B in the figure).

  If it does in this way, the state visually recognized from the front-end | tip direction will be the same state as FIG. 3 (A), and the magnitude | size of the suction opening part 82 will become larger than the case of concentricity. Therefore, it is possible to suck a larger excised tissue than in the prior art in which the distal ends of the fluid ejection tube 70 and the suction tube 80 are concentric. Since the excised tissue is likely to be clogged in the suction opening 82, the suction capability can be increased by making the suction opening 82 large.

  Further, if the base end portions of the fluid ejection pipe 70 and the suction pipe 80 are concentric, the second case 52 can be processed more easily than the structure in which the fluid ejection pipe 70 and the suction pipe 80 are eccentric and fixed to the second case 52 as in the first embodiment. , There is an effect that each press-fitting process becomes easy.

The fluid ejection pipe 70 may be bent in advance and may be biased toward the inner peripheral surface of the suction pipe 80 by the elastic force of the fluid ejection pipe 70. At this time, the rigidity of the suction pipe 80 is set to such an extent that it can withstand the elastic force of the fluid ejection pipe 70 and the vibration can be suppressed. In this way, there is no need to fix the tip.
(Third embodiment)

  Next, a third embodiment will be described with reference to the drawings. This embodiment is characterized in that the connection position of the suction pipe 80 and the third connection tube 5 is different from that of the second embodiment described above. Therefore, the common elements will be described with the same reference numerals as those of the second embodiment, focusing on the differences from the second embodiment.

  FIG. 5 is a partial cross-sectional view illustrating the structure of the fluid ejection pipe 70 and the suction pipe 80 according to the present embodiment. The relationship between the fluid ejection pipe 70 and the suction pipe 80 is the same as in the second embodiment described above. In the second embodiment, the fluid ejection pipe 70 and the suction pipe 80 are fixed eccentrically at the tip. Accordingly, the suction flow path 81 other than the fixed portion gradually decreases toward the proximal end portion, and has the same size as that of the concentric case in the vicinity of the opening 83 where the third connection tube 5 is provided. Therefore, it is desirable to provide the opening 83 in a range where the suction channel 81 is large.

  Therefore, the opening position C is provided at a position where the suction channel 81 is wider. In such a case, a pipe joint 93 having a connection channel 92 is used. The connection flow path 92 is bent in a substantially L shape, and the third connection tube 5 extends along the suction pipe 80 and further extends along the second connection tube 4b (see FIG. 2). At this time, the third connection tube 5 may be molded as shown in the figure. When the third connection tube 5 has sufficient elasticity, the suction pipe 80 is attached by a binding band (not shown) or the like in the vicinity of the figure D. You may bind them together.

In this way, by providing the opening 83 at a location larger than the case where the suction flow path 81 is concentric, it is possible to suppress a decrease in suction capability. Even in such a structure, the vicinity of the pipe joint 93 of the third connection tube 5 extends along the suction pipe 80, and the vicinity of the pulsation generation unit 20 extends along the second connection tube 4b. It becomes easy to hold 20 and does not hinder operability. Further, the structure of the second case 52 to which the base end portions of the fluid ejection pipe 70 and the suction pipe 80 are attached can be simplified. The pipe joint 93 and the suction pipe 80 may be formed integrally, or the pipe joint 93 and the third connection tube 5 may be formed integrally.
(Fourth embodiment)

  Next, a fourth embodiment will be described with reference to the drawings. In this embodiment, in contrast to the third embodiment described above, the fluid ejection pipe 70 is bent halfway from the base end to the distal end, and the fluid ejection pipe 70 and the suction pipe 80 are fixed at the distal end. Has characteristics. Therefore, the common elements will be described with the same reference numerals as those in the third embodiment, focusing on the differences from the third embodiment.

  FIG. 6 is a partial cross-sectional view showing the structure of the fluid ejection pipe 70 and the suction pipe 80 according to the present embodiment. The attachment structure of the fluid ejection pipe 70 and the suction pipe 80 to the second case 52 is the same as that of the second and third embodiments described above and is concentric with each other. In the present embodiment, the fluid ejection pipe 70 is bent substantially in the vicinity of the center, the tip side of the bent part 70a contacts the inner peripheral surface of the suction pipe 80, and an adhesive or brazing is applied at the tip part (range B in the figure). It is fixed using a fixing means such as adhesive fixing with an agent or welding. The proximal end side of the bent portion 70a is substantially concentric with the suction tube 80.

  An opening 83 (opening position C) provided in the suction pipe 80 is disposed on the distal end side with respect to the bending portion 70 a and communicates with the third connection tube 5 by a pipe joint 93. The third connection tube 5 extends along the second connection tube 4b.

  In this way, by providing the opening 83 at a position where the suction flow path 81 from the suction opening 82 to the bent portion 70a is large, it is possible to form the suction flow path 81 having substantially the same size as the suction opening 82. The ablated tissue larger than the concentric case can be removed by suction.

If the bent portion 70a is brought closer to the base end side, the opening 83 of the suction tube 80 can be brought closer to the pulsation generating portion 20, and the pulsation generating portion 20 can be easily gripped, improving operability. it can. If the bent portion 70a is provided within the range of the second case 52, the opening 83 can be provided in the second case 52 as in the second embodiment (see FIG. 4).
(5th Example)

  Next, a fifth embodiment will be described with reference to the drawings. The present embodiment is characterized in that the suction pipe 80 of the first to fourth embodiments described above is formed in a straight line while being bent halfway. When the fluid ejecting apparatus 1 is used for abdominal surgery or the like, the surgical site may not be in a straight line with respect to the insertion position of the suction tube 80 on the body surface. In such a case, it is required that the distal end portions of the fluid ejection pipe 70 and the suction pipe 80 be bent with respect to the proximal end portion. The present embodiment has a form corresponding to such a case. In addition, based on the structure of 2nd Example, the same code | symbol is attached | subjected and demonstrated to a common functional element with 2nd Example.

  FIG. 7 is a partial cross-sectional view showing the structure of the fluid ejection pipe 70 and the suction pipe 80 according to the present embodiment. The suction tube 80 is bent at an intermediate portion between the distal end portion and the proximal end portion. The fluid ejection pipe 70 is bent following the inner peripheral surface of the suction pipe 80, and is fixed by an adhesive, a brazing agent, or the like in the vicinity of the fluid ejection opening 72 (range B in the figure), or a fixing means such as welding. Is fixed to the inner peripheral surface of the suction tube 80.

  Although a method of bending the fluid ejection pipe 70 in accordance with the shape of the suction pipe 80 is also conceivable, in practice it is structurally difficult to insert the bent pipe into the bent pipe. Therefore, after the substantially straight fluid ejection pipe 70 is press-fitted and fixed to the second case 52, the suction pipe 80 is inserted from the fluid ejection opening 72 side. At that time, in the fluid ejection pipe 70, the tip of the fluid ejection pipe 70 hits the slope 80a at the bending position of the suction pipe 80, and the fluid ejection pipe 70 is bent following the slope 80a and the bending part 80b. When the base end portion reaches 52, the shape is as shown in FIG. In the case of abdominal cavity surgery, since the length of the fluid ejection tube 70 and the suction tube 80 is about 200 mm to 400 mm, the bending angle becomes gentler than the illustrated state.

  Therefore, according to the present embodiment, even when the distal end portions of the fluid ejection tube 70 and the suction tube 80 are bent with respect to the proximal end portion depending on the surgical site and method, the suction tube 80 and the fluid ejection at the distal end portion. The tube 70 is in an eccentric state, and the suction opening 82 can be made larger than in the case of concentricity. The bent portion of the suction channel 81 has a position that is smaller than the suction opening 82, but since the outer diameter of the fluid ejection tube 70 is circular, the channel resistance is very small and Does not interfere with suction.

In the present embodiment, the fluid ejection tube 70 is inserted following the inner peripheral surface of the bent suction tube 80, so that the tip portion is elastic on the inner peripheral surface of the suction tube 80. Therefore, it is not necessarily fixed if the biasing force has a magnitude that can suppress vibration. Also from this fact, the rigidity of the suction pipe 80 is set to be larger than the rigidity of the fluid ejection pipe 70.
(Sixth embodiment)

  Next, a sixth embodiment will be described with reference to the drawings. This embodiment is inclined with respect to the fluid ejection flow path 71 with respect to the fluid ejection direction of the first to fifth embodiments described above being linear or parallel to the fluid ejection flow path 71. It is characterized by facing in the direction. Depending on the surgical site, excision may be performed at a position deviating from the extending direction of the suction tube 80. The present embodiment has a form corresponding to such a case. In addition, based on the structure of 1st Example, the same code | symbol is attached | subjected and demonstrated to a common functional element with 1st Example.

  FIG. 8 is a partial cross-sectional view showing the structure of the fluid ejection pipe 70 and the suction pipe 80 according to the present embodiment. The fluid ejecting tube 70 and the suction tube 80 are bent at the distal end, and the fluid ejecting tube 70 follows the inner peripheral surface of the bent portion of the suction tube 80. Then, it is fixed to the inner peripheral surface of the suction pipe 80 by using a fixing means such as an adhesive, a brazing agent or the like in the vicinity of the fluid ejection opening 72 or by welding.

  When the flow path diameter of the suction pipe 80 is d1, and the bending height of the fluid ejection pipe 70 is represented by h, the flow path diameter d1 is set so as to satisfy the relationship h <d1. In this way, the fluid ejection tube 70 can be inserted into the suction tube 80.

  By doing in this way, the excision of the excised tissue and the excision of the excised tissue can be performed depending on the surgical site. Note that the structure according to the present embodiment can also be applied to each of the first to fifth embodiments described above.

  By providing the medical device with the fluid ejection device 1 of the present embodiment, it is possible to receive the same effects as the various effects that the fluid ejection device 1 enjoys. That is, for this reason, incision of a living tissue that can enjoy the same effects as those enjoyed by the fluid ejection device 1 of the present embodiment described above, in addition to crushing stones and the like, and introducing fluid into living cells Various medical devices such as removal of intravascular emboli can be realized.

  DESCRIPTION OF SYMBOLS 1 ... Fluid injection apparatus (surgical tool) 2 ... Fluid container 3 ... Recovery container 4a ... 1st connection tube 4b ... 2nd connection tube 5 ... 3rd connection tube 10 ... Supply pump (fluid supply means) 11 ... Suction pump (suction) Means) 20 ... Pulsation generating part 30 ... Piezoelectric element (volume changing means) 35 ... Reinforcing plate 40 ... Diaphragm 50 ... First case 51 ... Third case 52 ... Second case 60 ... Fluid chamber 61 ... Inlet flow path 62 ... Outlet Flow path 70 ... Fluid ejection pipe 70a ... Bending part 71 ... Fluid ejection channel 72 ... Fluid ejection opening 80 ... Suction pipe (outer tube) 80a ... Slope 80b ... Bending part 81 ... Suction channel 82 ... Suction opening 83 ... Opening 90 ... Light source device 91 ... Light source 92 ... Connection flow path 93 ... Pipe joint 100 ... Light guide member 101 ... Light incident surface 102 ... Light exit surface.

Claims (6)

A pulsation generator for generating a pulsating flow of fluid;
A fluid ejection pipe that communicates with the pulsation generator and has a fluid ejection opening through which fluid is ejected;
A suction pipe for inserting the fluid ejection pipe, and an inner circumferential surface of the suction pipe is fixed to the outer circumferential surface of the fluid ejection pipe in the vicinity of the fluid ejection opening;
A light source that emits light;
A light guide member provided on an outer peripheral surface of the suction tube, and guiding light emitted from the light source to the vicinity of the fluid ejection opening;
A fluid ejecting apparatus capable of indicating, by light, a position where a living tissue is excised, incised, or crushed when the ejected fluid hits. The fluid ejection device according to claim 1,
The fluid ejection pipe and the suction pipe bend at the tip,
The fluid ejecting apparatus, wherein the light guide member is attached to the bent portion of the fluid ejecting pipe. The fluid ejection device according to claim 1 or 2,
The fluid ejecting apparatus, wherein the suction pipe has a suction opening, and has a portion having a flow passage cross-sectional area larger than a flow passage cross-sectional area of the suction opening at a position near the suction source of the suction pipe. .
A fluid ejecting apparatus. The fluid ejection device according to any one of claims 1 to 3,
The fluid ejecting apparatus according to claim 1, wherein the light source is disposed to face a light incident surface of the light guide member. The fluid ejection device according to any one of claims 1 to 4,
The fluid ejecting apparatus, wherein the light source is a laser.   A medical device comprising the fluid ejection device according to claim 1.

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