JP2011067491A - Fluid jet device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively penetrate a blood clot and the like with a pulsation flow while removing the whole of blood clot and the like by emitting a jet of a fluid widely. <P>SOLUTION: An auxiliary jet orifice is opened to a direction different from a direction of a jet orifice emitting a pulsation flow, and it is connected to an auxiliary fluid path which is different from a connection fluid path connected to the jet orifice. The fluid is continuously emitted from the auxiliary jet orifice by continuously sending the fluid to the auxiliary fluid path. The result is that the pressure of pulsation flow does not decrease because of the auxiliary jet orifice, and the cutting performance of the pulsation flow is kept while the fluid can be emitted from the auxiliary jet orifice within the area where the pulsation flow can not be emitted. Then, the auxiliary jet orifice can keep the cutting performance by continuously emitting the jet of the fluid even when the pressure of the fluid disperses and decreases by emitting the jet of the fluid widely. As a result, the blood clot and the like can be penetrated effectively by the pulsation flow while the whole of blood clot and the like can be removed by emitting the jet of the fluid widely. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique for ejecting fluid from an ejection port.

In recent years, surgical techniques have been used to incise the surgical site by the pressure of the fluid and remove foreign substances such as blood clots and tumors by pressurizing and spraying fluid such as water and saline during surgery. Has been developed. In the fluid ejecting apparatus used for such surgery, fluid is ejected continuously from the ejection nozzle, and during the operation, the surgeon picks up the ejection nozzle and points it to the surgical site. It is possible to incise the surgical site or excise a tumor or the like by ejecting fluid from the head.

Moreover, not only a fluid ejecting apparatus that performs an operation by holding an ejection nozzle in a hand, but also the tubular organ is closed by ejecting a fluid while the ejection nozzle is inserted into a tubular organ such as a blood vessel. A so-called catheter-type fluid ejecting apparatus that destroys and removes an obstruction such as a thrombus has also been developed. In a fluid ejecting apparatus of the type used by being inserted into such an organ, it is desirable to destroy a thrombus or the like with as little fluid as possible in order to prevent unnecessary fluid from entering the organ. In view of this, a technique has been proposed in which an instantaneously pressurized fluid mass is intermittently ejected to increase the fluid destruction capability and remove a thrombus or the like with a small amount of fluid (Patent Document 1). .

JP 2009-39383 A

However, with the proposed technology, it is difficult to eject fluid over a wide range,
There has been a problem that it is difficult to completely remove obstructions such as blood clots. That is, for the convenience of instantaneously pressurizing the fluid and injecting it in a state where the pressure is increased, if the diameter of the injection port is increased or a plurality of injection ports are provided, the pressure of the fluid is extremely reduced. Therefore, it is difficult to increase the diameter of the ejection port or provide a plurality of ejection ports, and the range in which fluid can be ejected is inevitably limited. For this reason, even though a part of the thrombus can be efficiently destroyed and penetrated with a small flow rate, it is difficult to completely remove the thrombus and the like completely.

The present invention has been made to solve the above-described problems of the prior art,
An object of the present invention is to provide a technique capable of ejecting a fluid in a wide range and removing the entire thrombus and the like while allowing a thrombus and the like to be efficiently penetrated by ejecting an instantaneously pressurized fluid.

In order to solve at least a part of the problems described above, the fluid ejecting apparatus of the present invention employs the following configuration. That is,
A fluid ejection device that ejects fluid from an ejection port of a nozzle inserted into an organ of a living body to an operation site of the organ,
The fluid is supplied, and a fluid chamber connected to the ejection port via a connection channel;
Pulsating flow ejecting means for ejecting fluid in the fluid chamber in a pulsating manner from the ejection port by changing the volume of the fluid chamber;
An auxiliary injection port that is connected to an auxiliary flow channel different from the connection flow channel and is provided to open in a direction different from the injection port;
And a fluid continuous delivery means for continuously delivering the fluid to the auxiliary flow path.

In the fluid ejecting apparatus of the present invention, the pulsating flow is ejected from the nozzle ejection port. Moreover, the auxiliary injection port opened in the direction different from an injection port is provided, and this auxiliary injection port is connected to the auxiliary flow path different from the connection flow path connected to the injection port. Then, the fluid is continuously ejected from the auxiliary ejection port by continuously feeding the fluid to the auxiliary flow path.

If the auxiliary injection port is connected to a flow path different from the injection port, the pressure of the pulsating flow injected from the injection port will not decrease due to the auxiliary injection port. For this reason, it is possible to compensate for the range in which the pulsating flow cannot be injected by injecting the fluid from the auxiliary injection port in a direction different from the pulsating flow while maintaining the excision ability of the pulsating flow. If the fluid is continuously sent out to the auxiliary injection port, even if the pressure of the fluid is dispersed and lowered by injecting the fluid over a wide range, the cutting ability can be maintained by continuously injecting the fluid. It is. This makes it possible to efficiently remove the thrombus and the like by ejecting fluid over a wide range while allowing the thrombus and the like to efficiently penetrate by the pulsating flow.

Note that different types of fluid may be ejected from the auxiliary ejection port and the ejection port. For example, physiological saline may be ejected from the ejection port to remove thrombus and the like, and a drug solution may be ejected from the auxiliary ejection port to apply the medicine to the trace from which the thrombus has been removed. If different types of fluid are ejected from the ejection port and the auxiliary ejection port in this way, different treatments can be applied to the surgical site by the ejection port and the auxiliary ejection port. In this way, a plurality of treatments can be performed by inserting the nozzle once into the organ, so that the time required for the operation can be shortened and the labor of the surgeon can be reduced.

Moreover, in the fluid ejecting apparatus of the present invention described above, an auxiliary flow path may be provided surrounding the connection flow path.

From the viewpoint of maintaining the ability to remove the pulsating flow, it is desirable to prevent the pressure of the pulsating flow from being dispersed and lowered in the connection flow path. However, if the rigidity of the connection channel is increased, it becomes difficult to insert the nozzle up to the surgical site in the living organ. So, if you surround the connecting channel with the auxiliary channel,
Since the rigidity of the connection flow path can be assisted by the pressure of the fluid sent to the auxiliary flow path or the connection flow path can be suppressed, dispersion of the pressure of the pulsating flow can be suppressed. Thereby, it becomes possible to inject a pulsating flow having a higher excision ability without increasing the rigidity of the connection flow path.

It is explanatory drawing which showed the apparatus structure of the fluid injection apparatus of a present Example. It is explanatory drawing which showed notionally the mode that the thrombus produced in the blood vessel was removed using the fluid injection apparatus of a present Example. It is explanatory drawing which showed the detailed structure of the injection mechanism with which the fluid injection apparatus of the present Example was equipped. It is explanatory drawing which showed the detailed structure of the nozzle part of the fluid injection apparatus of a present Example. It is explanatory drawing which showed a mode that the thrombus produced in the blood vessel was removed using the fluid injection apparatus of a present Example. It is explanatory drawing which showed notionally why the pulse flow can be ejected at a higher flow rate by using a double-structured channel tube. It is explanatory drawing which showed the fluid ejection apparatus of the modification provided with the suction flow path in addition to the inner flow path and the outer flow path.

Hereinafter, in order to clarify the contents of the present invention described above, examples will be described in the following order.
A. Device configuration of fluid ejection device:
B. Nozzle part of this example:
C. Variation:
C-1. First modification:
C-2. Second modification:

A. Device configuration of fluid ejection device:
FIG. 1 is an explanatory view showing a device configuration of the fluid ejecting apparatus of the present embodiment. As shown in the figure, the fluid ejection device 10 of this embodiment includes a fluid tank 150 in which fluid such as physiological saline and chemicals is stored, a suction pump 140 that sucks fluid from the fluid tank 150, and a suction pump. The injection mechanism 100 is configured to pressurize the fluid sucked up by 140 and send the fluid to the flow channel tube 120. The fluid pressurized by the ejection mechanism 100 passes through the flow channel tube 120, reaches the nozzle unit 130 provided at the tip of the flow channel tube 120, and is ejected from the main injection port 132 provided at the tip of the nozzle unit 130. The By using the pressure of the fluid ejected from the fluid ejecting apparatus 10, it is possible to perform an operation of excising a tumor generated in a human organ or destroying and removing a thrombus generated in a blood vessel. .

FIG. 2 is an explanatory view conceptually showing how a thrombus generated in a blood vessel is removed using the fluid ejecting apparatus of this embodiment. As shown in the figure, when removing the thrombus, the flow channel tube 120 of the fluid ejection device 10 of the present embodiment is inserted into the blood vessel, and the nozzle portion 130 provided at the tip of the flow channel tube 120 is inserted. Move closer to the thrombus. The ejection mechanism 100 is driven to eject fluid from the tip of the nozzle unit 130 toward the thrombus, thereby destroying and removing the thrombus by the pressure of the fluid. In surgery to remove the thrombus using the pressure of such fluid, while the fluid is ejected at a strong pressure that can destroy the thrombus, the amount of fluid to be ejected should be kept small so that unnecessary fluid does not flow into the blood vessel as much as possible. is important. For this reason, the fluid ejecting apparatus 10 of the present embodiment includes the ejecting mechanism 100 having the following configuration.

FIG. 3 is an explanatory view showing a detailed structure of an ejection mechanism provided in the fluid ejection device of the present embodiment. As shown in FIG. 3A, the injection mechanism 100 includes a supply channel 106 to which a fluid is supplied by the suction pump 140, and a pressure chamber in which the fluid supplied from the suction pump 140 is filled. 102, an ejection flow path 108 through which fluid is pushed out from the pressurizing chamber 102 toward the flow path tube 120, and the like. A piezo element 110 is connected to the pressurizing chamber 102 via a film member (so-called diaphragm) 112. By applying a voltage to the piezo element 110 to expand and contract the piezo element, the film member 112 is driven. The volume in the pressurizing chamber 102 can be changed.

When the fluid is ejected, first, as indicated by the white arrow in FIG. 3A, a voltage is applied to the piezo element 110 to contract the piezo element 110, and the volume of the pressurizing chamber 102 is reduced. To spread. At this time, as indicated by the black arrow in the figure, the suction chamber 140 is connected to the pressurizing chamber 10.
Since the fluid is supplied to the pressure chamber 2, the pressure chamber 102 can be filled with the fluid even when the volume of the pressure chamber 102 is expanded. Next, as shown by a white arrow in FIG. 3B, the piezo element 110 is extended to compress the pressurizing chamber 102.

The pressurizing chamber 102 is connected with two flow paths, ie, an ejection flow path 108 and a supply flow path 106. Since these flow paths are formed narrow, the piezo element 110 is used as a pressurizing chamber. If the pressure 102 is compressed, the pressure of the fluid in the pressurizing chamber 102 can be sufficiently increased. This pressure
The fluid in the pressurizing chamber 102 is strongly pushed in the direction of the ejection flow path 108, and as a result, the ejection flow path 1
The fluid can be ejected at a high speed from the tip of the nozzle unit 130 connected to 08.
In addition, the fluid in the pressurizing chamber 102 is pushed out not only to the ejection flow path 108 but also to the supply flow path 106. The ease of fluid flow into each flow path (so-called inertance) depends on the length of the flow path and the flow path. Since it is determined by the cross-sectional area and the like, if the length and cross-sectional area of the supply channel 106 and the ejection channel 108 are appropriately set, the amount of fluid flowing into the supply channel 106 is less than the amount of fluid flowing into the ejection channel 108. It is possible to suppress. As a result, most of the fluid in the pressurizing chamber 102 can be pushed out to the ejection channel 108 and ejected from the nozzle part 130 connected to the ejection channel 108 at a high speed.

After ejecting the fluid droplet, the piezo element is contracted again (see FIG. 3A), and then the piezo element 110 is expanded (see FIG. 3B) to eject the fluid droplet again. be able to. By repeating such operations, the fluid ejecting apparatus 10 of the present embodiment can repeatedly eject high-speed fluid droplets, thereby sufficiently ejecting fluid at a high speed and sufficiently destroying thrombus and the like. Is possible. Since the fluid is not ejected continuously but is ejected in a pulsating manner, the total amount of fluid to be ejected can be reduced. Note that pulsating ejection means a liquid flow in which the liquid flow direction is constant and the liquid flow rate or flow velocity is periodically or irregularly changed. This pulsating injection includes an intermittent flow in which the flow and stop of the liquid are repeated. However, since the flow rate or flow rate of the liquid only needs to fluctuate periodically or irregularly, it is not necessarily an intermittent flow. . Similarly, ejecting a liquid in a pulse form (injecting a pulse flow) means ejecting a liquid in which the flow rate or moving speed of the ejected liquid fluctuates periodically or irregularly. An example of this pulsed injection is intermittent injection in which liquid injection and non-injection are repeated. However, since the flow rate or flow rate of the liquid to be injected only needs to fluctuate periodically or irregularly, it is not always intermittent injection. Need not be.

However, when the fluid is ejected in a pulsating manner, if a plurality of ejection ports are provided, the pressure of the fluid is dispersed and the speed of the fluid droplets decreases, so it is difficult to provide the nozzle unit 130 with a plurality of ejection ports. is there. For this reason, the range in which the fluid can be ejected is inevitably limited, and it may not be possible to completely remove the thrombus by ejecting the fluid over the entire thrombus. Therefore, in the fluid ejecting apparatus 10 of the present embodiment, the nozzle unit 130 is configured as follows to eject the fluid over a wide range while suppressing the amount of fluid ejected by ejecting the fluid in a pulsating manner. It is possible to remove thrombus and the like reliably.

In the ejection mechanism 100 of the fluid ejection device 10 of the present embodiment, the piezo element 110 and the film member 112 are used as a configuration for changing the volume of the pressurizing chamber. However, if the fluid can be ejected in a pulsating manner, Any configuration may be used. For example, you may use the structure which changes the volume of a pressurization chamber using movable walls like a piston.

B. Nozzle part of this example:
FIG. 4 is an explanatory view showing the detailed structure of the nozzle portion of the fluid ejection device of the present embodiment. FIG.
As shown in (a), the nozzle portion 130 of the present embodiment includes a plurality of auxiliary devices provided around the main injection port 132 in addition to the main injection port 132 provided at the tip of the nozzle unit 130. Injection port 1
34 is provided. FIG. 4B shows a state in which the nozzle unit 130 is viewed from the direction of the main injection port 132. As shown in FIG. 4A and FIG. 4B, the auxiliary injection port 134 opens in a direction different from the main injection port 132, and the main injection port 132 ejects fluid ( It is possible to eject the fluid in a direction (direction indicated by an arrow in the drawing) different from the tip direction of the nozzle unit 130.

In FIG. 4C, the flow path tube 120 to which the nozzle portion 130 is connected is shown in FIG.
A sectional view taken along the alternate long and short dash line "A" is shown. As shown in the figure, the channel tube 120 has a double structure including two channels: an inner channel 122 provided in the central portion and an outer channel 124 provided outside thereof. Yes. As shown in FIG. 4A, the outer flow path 124 is connected to the auxiliary injection port 134, and the inner flow path 122 is connected to the main injection port 132. Further, the other end of the inner flow path 122 connected to the main injection port 132 is connected to the injection mechanism 100, and the pulse flow generated by the injection mechanism 100 is transmitted through the inner flow path 122 to the main injection port 132. It is possible to spray from. On the other hand, the outer channel 124
Is connected to the water flow pump 160. The water flow pump 160 is connected to a fluid tank 150 (see FIG. 1), and by driving the water flow pump 160, fluid can be sent from the fluid tank 150 to the auxiliary injection port 134 and injected from the auxiliary injection port 134. Is possible. Using such a configuration, the fluid ejecting apparatus 10 according to the present embodiment removes the thrombus generated in the blood vessel as follows.

FIG. 5 is an explanatory view showing a state in which a thrombus generated in a blood vessel is removed using the fluid ejecting apparatus of this embodiment. When removing the thrombus, first, as shown in FIG. 5A, the injection mechanism 100 is driven with the nozzle portion 130 inserted into the blood vessel, and a pulse flow is injected from the main injection port 132. . As described above, since a fluid droplet is ejected at high speed in a pulse flow, it is possible to destroy a thrombus by the fluid droplet. However, because the fluid injection range is limited,
As shown in the drawing, even though a part of the thrombus can be broken and a hole can be made in the thrombus, a thrombus remnant may remain around the thrombus. Therefore, if a pulse flow is ejected from the main injection port 132 to make a hole in the thrombus, then, as shown in FIG. 5 (b), the nozzle part 130 is advanced into the hole made in the thrombus, In this state, the water pump 160 is driven to inject fluid from the auxiliary injection port 134. Then, since the auxiliary injection port 134 is opened in a direction different from that of the main injection port 132, the main injection port 132 can inject the fluid to surrounding portions where the fluid could not be injected, so that the remaining It is also possible to remove clot debris.

As described above, in the fluid ejection device 10 according to the present embodiment, the auxiliary ejection port 134 that ejects fluid in a direction different from the main ejection port 132 is provided. This makes it possible to remove thrombotic debris and the like that are difficult to remove with the main injection port 132 alone. In this way, the main injection port 1 is reduced while suppressing the amount of fluid to be injected by injecting a pulse flow from the main injection port 132.
In 32, the range in which the fluid cannot be ejected can be supplemented by the auxiliary ejection port 134, so that it is possible to reliably remove thrombus and the like by ejecting the fluid over a wide range while suppressing the amount of fluid to be ejected. In particular, in a narrow organ such as a blood vessel, it is difficult to change the injection direction from the main injection port 132 by moving the nozzle unit 130, but the auxiliary injection port 134 that compensates for the range where the main injection port 132 cannot inject is provided in advance. If it is provided, there is no need to change the injection direction of the main injection port 132, so that it is possible to easily inject a fluid into a sufficient range even in such a narrow space.

Further, in the fluid ejection device 10 of the present embodiment, by providing the main ejection port 132 at the tip of the nozzle portion 130, a pulse flow is ejected in the direction in which the nozzle portion 130 enters the blood vessel. Then, by providing the auxiliary injection port 134 in a direction orthogonal to the main injection port 132, fluid can be injected in a direction orthogonal to the intrusion direction. In this way, the nozzle portion 130 can be allowed to enter the blood vessel while making a hole in the thrombus or the like with a pulse flow from the main injection port 132, and the debris remaining around can be removed by the fluid from the auxiliary injection port 134. Therefore, the nozzle part 130 can be allowed to enter the blood vessel or the like while removing the thrombus or the like with certainty. Then, if the thrombus is removed while the nozzle portion 130 enters the blood vessel in this way, the surgeon only has to insert the nozzle portion 130 into the blood vessel, so the operation at the time of operation is simplified and the operation is performed more quickly. Can be done.

Furthermore, in the fluid ejecting apparatus 10 of the present embodiment, the flow path tube 120 has a double structure including the inner flow path 122 provided on the inner side and the outer flow path 124 surrounding the inner flow path 122. It is possible to inject a pulse flow at a higher flow rate. This point will be described with reference to FIG.

FIG. 6 is an explanatory diagram conceptually showing the reason why a pulse flow can be ejected at a higher flow rate by using a dual-structure channel tube. As described above, the channel tube 120 is
Two flow paths, an inner flow path 122 and an outer flow path 124, are provided, and the pulse flow is ejected from the main injection port 132 through the inner flow path 122. On the other hand, in the outer flow path 124, the fluid sent out by the water flow pump 160 flows toward the auxiliary injection port 134. For this reason, the wall surface of the inner flow path 122 can be pressed by the pressure of the fluid sent out by the water flow pump 160 as indicated by the white arrow in the figure. Then, the inner flow path 12
When the pulse flow is passed through 2, the wall surface of the inner flow path 122 is pressed, so that the pressure of the pulse flow can be prevented from escaping in the direction of the wall surface. Further, the outer channel 124
Since the inner channel 122 is pressed by the inner fluid, the rigidity of the inner channel 122 can be assisted by the fluid in the outer channel. Thereby, it is possible to cause the pulse flow to reach the main injection port 132 while maintaining the pressure pressurized by the injection mechanism 100, and as a result, it is possible to inject a higher-speed pulse flow.

In this way, by using the pressure of the fluid ejected from the auxiliary ejection port 134, the main ejection port 132 is used.
It is possible to prevent the pressure of the pulse flow ejected from escaping, so that it becomes possible to eject the thrombus more efficiently by ejecting a faster pulse flow. In addition, since the flow channel tube 120 is inserted to the position of the surgical site such as a thrombus while bending along the shape of a blood vessel or the like, if the rigidity of the flow channel tube 120 is increased in order to prevent the pressure of the pulse flow from escaping, It becomes difficult to insert the flow channel tube 120 to the position of the surgical site. In this respect, if the wall surface of the pulse flow channel is pressed by the fluid pressure, the pulse tube pressure can be prevented from escaping even if the channel tube itself is not rigid. It is possible to inject a high-speed pulse flow while maintaining the properties. In addition, as shown in FIG.
By using a channel tube in which the two channels are formed concentrically, the inner channel 122 is surrounded by the outer channel 124 so that the pressure of the fluid in the inner channel 122 can escape more toward the wall surface. Since it can be reliably suppressed, it is possible to reliably destroy a thrombus and the like by ejecting a higher-speed pulse flow.

C. Modified example:
Below, the modification of the Example mentioned above is demonstrated. In the following modification, the same components as those of the above-described embodiment are denoted by the same reference numerals as those of the embodiment, and detailed description of the same components is omitted.

C-1. First modification:
In the above-described embodiment, the description has been given on the assumption that the flow path tube 120 includes the two flow paths of the outer flow path 124 and the inner flow path 122. However, it is also possible to provide another channel in addition to these two channels.

FIG. 7 is an explanatory view showing a modified fluid ejecting apparatus including a suction channel in addition to the inner channel and the outer channel. As shown in FIG. 7A, in the fluid ejection device 10 of the modified example, the suction flow path 126 connected to the suction pump 170 is provided outside the outer flow path 124,
As shown in FIG. 7B, the channel tube 120 has a triple structure in which a suction channel 126 is formed in addition to the inner channel 122 and the outer channel 124.

As shown in FIG. 7A, the suction channel 126 is opened near the nozzle portion 130 (see the portion indicated by “B” in the drawing), and drives the suction pump 170. As a result, it is possible to remove the thrombus debris excised by the nozzle part 130, the fluid jetted into the blood vessel, and the like by suctioning from the opening. If the fluid ejecting apparatus of such a modification is used, not only the nozzle portion 130 is inserted into the blood vessel once, but also the fluid is ejected to the thrombus and the thrombus etc. is destroyed,
It is also possible to suck and discharge broken thrombus fragments. Further, if the suction channel 126 is provided on the outermost side of the channel tube 120, the opening area of the opening of the suction channel 126 (see the portion indicated by “B” in the figure), the suction channel 126 It is possible to increase the inner cross-sectional area.
Accordingly, the suction force of the suction pump 170 can be reliably transmitted to the opening via the suction flow path 126, and the thrombus debris can be sucked from a wide range around the opening. It can be removed more efficiently.

C-2. Second modification:
Further, different types of fluid may be passed through the outer channel 124 and the inner channel 122. For example, it is assumed that the inner flow path 122 that passes the pulse flow passes the physiological saline, and the outer flow path 12.
4 may be a medicine that is applied to the scar from which the thrombus has been removed. In these cases,
By simply inserting the nozzle part 130 into the blood vessel once, not only the thrombus can be removed, but also a treatment such as applying a medicine can be performed at the same time, so that surgery can be performed more efficiently.

In this way, if each of the plurality of channels of the channel tube has a different function, a plurality of treatments such as removing a thrombus or applying a drug can be performed simultaneously by inserting the channel tube once into a blood vessel or the like. Since it can be performed, surgery can be performed more efficiently.

Although the fluid ejecting apparatus according to the present embodiment has been described above, the present invention is not limited to all the embodiments and modifications described above, and can be implemented in various modes without departing from the spirit of the present invention. . For example, in the above-described embodiment, the fluid ejecting apparatus used for the operation for removing the thrombus has been described as an example. However, the present invention is not limited to the operation for removing the thrombus,
The present invention can also be applied to a fluid ejecting apparatus used in an operation for removing various foreign matters such as a tumor. In such a case as well, while suppressing the fluid injection amount by injecting the pulse flow from the main injection port, supplementing the range where the main injection port cannot be injected with the auxiliary injection port, the fluid can be reduced while suppressing the fluid injection amount. It is possible to spray over a wide range.

DESCRIPTION OF SYMBOLS 10 ... Fluid injection apparatus, 100 ... Injection mechanism, 102 ... Pressurization chamber,
106 ... Supply channel, 108 ... Jet channel, 110 ... Piezo element,
112 ... Membrane member, 120 ... Channel tube, 122 ... Inner channel,
124 ... Outer channel, 126 ... Suction channel, 130 ... Nozzle part,
132 ... main injection port, 134 ... auxiliary injection port, 140 ... suction pump,
150 ... Fluid tank, 160 ... Water flow pump, 170 ... Suction pump

Claims (2)

A fluid ejection device that ejects fluid from an ejection port of a nozzle inserted into an organ of a living body to an operation site of the organ,
The fluid is supplied, and a fluid chamber connected to the ejection port via a connection channel;
Pulsating flow ejecting means for ejecting fluid in the fluid chamber in a pulsating manner from the ejection port by changing the volume of the fluid chamber;
An auxiliary injection port that is connected to an auxiliary flow channel different from the connection flow channel and is provided to open in a direction different from the injection port;
A fluid ejection device comprising: fluid continuous delivery means for continuously delivering the fluid to the auxiliary flow path. The fluid ejection device according to claim 1, wherein the auxiliary channel is a channel provided so as to surround the connection channel.

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