JP6488621B2 - Perfusion suction device - Google Patents

Description

The present disclosure relates to a perfusion suction device for sucking with the removal tissue which supplies perfusate into the eye of the patient's eye.

  There is known a perfusion suction device that supplies a perfusate to a surgical site and sucks the supplied perfusate together with a removed tissue (see, for example, Patent Document 1). For example, in the ophthalmology field, the device disclosed in Patent Literature 1 is used in a cataract surgery, a vitreous surgery, or the like. The apparatus of Patent Document 1 performs suction using a peristaltic suction pump (peristaltic pump). In the peristaltic suction pump of Patent Document 1, a plurality of pump rollers arranged on a turntable rotate while crushing and closing the suction tube arranged between the suction pump and the tube receiver (that is, the suction tube) With multiple pump rollers). As a result, the liquid in the suction tube is pushed out in the direction of rotation of the pump roller, and suction pressure is generated. The suction tube extends to the waste liquid bag, and the perfusate containing the removed removed tissue is stored in the waste liquid bag.

Japanese Patent Laid-Open No. 2001-170062

  In the section where the ironing member (for example, the pump roller) is ironing the elastic member (for example, the tube), suction pressure is generated on the upstream side (patient side) from the blocking point where the ironing member is ironed. When the ironing by the ironing member is released, the suction pressure generated at the blocking point is released at once. In order to balance the pressure in the waste liquid flow path, the perfusate located downstream from the blockage point tries to return to the upstream side. As a result, an unpleasant noise is generated in the operator at the end of the waste liquid flow path where the perfusate and the gas come into contact.

An object of the present disclosure is to provide a perfusion suction device capable of reducing unpleasant noise during suction.

In order to solve the above problems, a perfusion suction device according to the present disclosure has the following configuration.
(1) Supply means for supplying perfusate into the eye of a patient's eye, a perfusion channel through which the perfusate supplied by the supply means flows, and an elastic member squeezed with a squeezing member, and the perfusate from the patient's eye A suction means for sucking waste liquid containing the waste liquid flow path through which the waste liquid sucked by the suction means flows, and one end connected to the perfusion flow path and the other end upstream of the portion squeezed by the suction means. A bypass flow path connected to the flow path of the waste liquid flow path; and a control valve for opening and closing the bypass flow path; a portion of the waste liquid flow path that is squeezed by the suction means; An air chamber is provided between the terminal portion from which the waste liquid is discharged into the gas to reduce abnormal noise during the suction .

According to the present disclosure, a perfusion suction apparatus that can reduce unpleasant noise during suction is provided.

It is an external view of the perfusion suction device of this embodiment. It is a schematic block diagram of the perfusion suction apparatus of FIG. It is explanatory drawing explaining the operation state of the suction means of the perfusion suction apparatus of FIG. It is explanatory drawing explaining the state which the turntable rotated 45 degree | times from the state of FIG. It is explanatory drawing explaining the air chamber of the perfusion suction apparatus of FIG. It is a figure of the 1st modification of an air chamber. It is a figure of the 2nd modification of an air chamber. It is explanatory drawing explaining the deformation | transformation state of a suction tube.

  Exemplary embodiments of the present disclosure will be described below with reference to the drawings. FIG. 1 is an external view of a perfusion suction device 1 of the present embodiment. FIG. 2 is a schematic configuration diagram of the perfusion suction device 1.

  The perfusion suction device 1 of this embodiment includes a main body 10 and a cassette 20. The main body 10 may include a monitor 11, a touch panel 11a, and a connection panel 15. The main body 10 includes a monitor 11 on the front as an example. For example, the main body 10 includes a touch panel 11a for performing various input operations. As an example, the connection panel 15 may be provided with a plurality of connectors to which cables or the like of the surgical handpiece 30 are connected. As an example, the monitor 11 may display a setting screen for surgical conditions, a list of surgical results that are driving results of the surgical device, and the like. For example, in order to set various operation conditions such as selection of the operation mode, height adjustment of the perfusion bottle 13, setting of the foot switch 18, suction pressure, ultrasonic output (US power, number of pulses, etc.) as the operation condition setting screen. May be displayed. In the perfusion suction apparatus 1 of the present embodiment, the suction pressure of the suction means 40 described later can be set between 0 and 700 mmHg.

  As an example, the main body 10 includes a holding unit 17 on the side surface on which a cassette 20 for cataract surgery or the like is mounted. When the cassette 20 is mounted on the holding unit 17, the cassette 20 may be loaded on the main body 10 by pressing the cover 17 a of the holding unit 17 toward the main body. The main body 10 may include a plurality of holding units 17 and a plurality of cassettes 20 may be mounted.

  As an example, the main body 10 includes a pole 14 and an arm 14a on the back surface. As an example, the pole 14 supports the perfusion bottle 13 in which a perfusate LQP such as physiological saline is placed. The arm 14a suspends the perfusion bottle 13 on the upper side of the pole 14 as an example. As an example, the pole 14 moves up and down when the drive mechanism 19 is driven by the control unit 100 based on an input signal from the touch panel 11a.

  As an example, the main body 10 includes an interface unit on the back surface. For example, the interface unit may be connected to an external device PC via a LAN, a USB storage device, or the like in order to externally transfer a surgical result or the like as electronic data. The main body 10 includes a foot switch 18 below as an example. The foot switch 18 may be used to adjust various operations such as ultrasonic vibration and suction operation of the movable tip provided at the distal end portion of the surgical handpiece 30. As an example, the main body 10 includes a control unit 100 (see FIG. 2). As an example, the control unit 100 is used for controlling various operations of the perfusion suction device 1.

  For example, the monitor 11, the touch panel 11a, the connection panel 15, the foot switch 18, the drive mechanism 19, the interface, and the memory may be connected to the control unit 100. The memory is a storage means, and may store a program for performing surgery and various types of surgical information acquired by the surgical operation of the main body 10. For example, the control unit 100 may be used as a display control unit, and the display state of the monitor 11 may be changed based on an input signal from the touch panel 11a or the like.

  The perfusion suction device 1 according to the present embodiment is an example of a supply unit 7 that supplies the perfusate LQP to the patient's eye E. The drive mechanism 19, the pole 14, the perfusion bottle 13, the perfusion tube 5, the control valve 73, and the surgical hand A piece 30 is provided. The supply means 7 may include a perfusion channel 8 through which the perfusate LQP flows. As described above, the perfusion bottle 13 filled with the perfusate LQP is suspended from the pole 14 of the perfusion suction device 1 of the present embodiment. The pole 14 is moved up and down by the drive mechanism 19. As the pole 14 moves up and down, the perfusion pressure of the perfusate LQP flowing from the perfusion bottle 13 is adjusted. The perfusate LQP from the perfusion bottle 13 passes through the perfusion tube 5 and is irrigated to the patient's eye E through the surgical handpiece 30 held by the operator. A control valve 73 is provided in the middle of the perfusion tube 5 as an example. The outflow control of the perfusate LQP is performed by opening and closing the control valve 73. The method of adjusting the perfusion pressure is not limited to the method of moving the pole 14 up and down. For example, the perfusion pressure may be adjusted using a pressure source that applies pressure to the perfusate.

  The perfusion suction device 1 of the present embodiment uses a US handpiece (ultrasonic handpiece) as an example of the surgical handpiece 30. The US handpiece, for example, emulsifies and removes the lens nucleus that has become opaque and hardened by cataract by ultrasonic vibration of a crushing tip provided at the tip. In order to perform ultrasonic vibration of the crushing tip, electric power may be supplied to the ultrasonic vibrator provided in the surgical handpiece 30 via the power cable 32. The surgical handpiece 30 is not limited to the US handpiece. As the surgical handpiece 30, for example, an I / A handpiece 31 (perfusion suction handpiece) may be used.

  For example, a flexible suction tube 6 is connected to the surgical handpiece 30. In the middle of the suction tube 6, for example, a pressure sensor 70 and a suction means 40 are provided (see FIG. 2). As an example, the suction tube 6 and the perfusion tube 5 communicate with each other via a bypass tube 72, and the control valve 74 controls the outflow of the bypass tube 72. As an example, the pressure sensor 70 constantly detects the suction pressure. When the suction pressure rises above the set value, the control unit 100 opens the control valve 74. By opening the control valve 74, the perfusate LQP may flow into the suction tube 6 from the perfusion tube 5 through the bypass tube 72, and the suction pressure may be lowered. The suction pressure may be set by an input operation on the touch panel 11a.

  As an example, the perfusion suction device 1 of the present embodiment sucks the waste liquid LQW from the suction hole provided in the crushing tip of the surgical handpiece 30. The waste liquid LQW is discharged into the waste liquid bag 20b through the suction tube 6 and the suction means 40. A waste liquid channel 9 is formed from the surgical handpiece 30 to the waste liquid bag 20b through which the waste liquid LQW sucked by the suction means 40 flows. An air chamber 50 is provided in the waste liquid channel 9. The air chamber 50 is provided between a portion (blockage point C1 or blockage point C2) squeezed by the suction means 40 and the end portion 21 of the waste liquid flow path 9 (the suction means 40 and the air chamber 50 will be described later). ). The waste liquid LQW includes, for example, the removed tissue of the patient's eye E crushed by the surgical handpiece 30 and the perfusate LQP supplied by the supply means 7. The control unit 100 controls the suction pressure by driving the suction means 40 based on, for example, a signal of the depression position of the foot switch 18 and a set value from the touch panel 11a.

  The suction means 40 of this embodiment is demonstrated using FIG. The perfusion suction device 1 of the present embodiment uses a peristaltic suction pump that squeezes and sucks the elastic member 41 with the squeezing member 43 as the suction means 40 that sucks the waste liquid LQW containing the perfusate LQP from the patient eye E. . Peristaltic suction pumps are sometimes called peristaltic type pumps. As an example, the suction means 40 uses the suction tube 6 as the elastic member 41. The suction means 40 includes, for example, a rotary table 42, a squeezing member 43, a tube receiver 44, and a rotary shaft 45. For example, the rotation shaft 45 is arranged at the center of the turntable 42. The rotating table 42 is provided with, for example, four ironing members 43 (43a to 43d). The four ironing members 43 are arranged on the same circumference of the turntable 42. Each of the four ironing members 43 may be arranged at equal angles around the rotation shaft 45. As an example, the suction means 40 of the present embodiment has four squeezing members 43 arranged at an angle of 90 degrees around the rotating shaft 45.

  As an example, the tube receiver 44 is provided at a position farther from the center of the rotating shaft 45 than the ironing member 43. The ironing member 43 and the tube receiver 44 are slightly separated from each other. The elastic member 41 (suction tube 6) can be disposed in a space between the squeezing member 43 and the tube receiver 44. When the rotary table 42 rotates, the suction means 40 of this embodiment rotates while the ironing member 43 sequentially crushes and closes the suction tube 6. FIG. 8A illustrates the cross-sectional shape of the suction tube 6 before being crushed by the ironing member 43. FIG. 8B illustrates the cross-sectional shape of the suction tube 6 after being crushed by the ironing member 43. As the suction tube 6 is crushed by the rotating squeezing member 43, the waste liquid LQW in the suction tube 6 is transferred, and the suction pressure for sucking the waste liquid LQW including the perfusate LQP from the patient's eye E is increased. Occur.

  The tube receiver 44 of this embodiment can be moved up and down (direction approaching or moving away from the center of the rotating shaft 45) by operating a lever portion not shown, for example. That is, when the tube receiver 44 moves up and down, the suction tube 6 before deformation can be disposed between the ironing member 43 and the tube receiver 44. Note that the perfusion suction device 1 of the present embodiment uses a silicon tube as the elastic member 41. The elastic member 41 is not limited to a silicon tube. For example, only a portion where the ironing member 43 abuts may be made of an elastic material. Further, as the material of the ironing member 43, for example, resin or metal may be used.

  Next, the cassette 20 of this embodiment will be described. The cassette 20 includes, for example, a housing 20a and a waste liquid bag 20b. The housing 20a may include, for example, a pressure sensor 70, an air chamber 50, a perfusion tube 5, a suction tube 6 (elastic member 41), and a bypass tube 72. For example, the housing 20a may be formed of ABS resin (acrylonitrile, butadiene, styrene, copolymer synthetic resin). The waste liquid bag 20b includes, for example, a storage bag 22 that stores the waste liquid LQW. The waste liquid LQW discharged from the end portion 21 is stored in the storage bag 22. The storage bag 22 of the present embodiment is formed of a transparent and flexible resin (vinyl). By setting it as this aspect, for example, the operator can grasp | ascertain easily the quantity of the accumulated waste liquid LQW. Further, since the storage bag can be folded before use, the cassette 20 can be easily carried. The cassette 20 can be provided at a low cost. At least one of the perfusion tube 5 and the suction tube 6 included in the housing 20 a may be a part of the perfusion channel 8 and the waste fluid channel 9.

  As an example, the perfusion suction device 1 of the present embodiment forms the control valve 73 by crushing the perfusion tube 5 of the cassette 20 with a pressing member included in the main body 10. As an example, the perfusion suction device 1 of the present embodiment forms the control valve 74 by crushing the bypass tube 72 of the cassette 20 with a pressing member included in the main body 10. As an example, the perfusion suction device 1 of the present embodiment forms the suction means 40 by squeezing the suction tube 6 (elastic member 41) of the cassette 20 with the squeezing member 43 provided in the main body 10. In addition, the perfusion suction device 1 of the present embodiment is provided with an air chamber 50 in the housing 20 a of the cassette 20 and in a section closer to the end of the waste liquid flow path 9 than the portion to be squeezed by the squeezing member 43. .

  As an example, in the cassette 20 of this embodiment, the pipe member of the waste liquid flow path 9 extends from the casing 20a of the cassette 20, and the mouth portion of the storage bag 22 closely covers the outer side surface of the extended pipe member. According to this aspect, for example, the cassette 20 that is detachably attached to the main body 10 includes the waste liquid bag 20b that stores the waste liquid LQW, and therefore, it becomes easy to handle a member that is discarded and washed after the operation. Moreover, since only the tube is included in the cassette 20 among the members constituting the control valve 73 or the control valve 74, for example, the configuration of the cassette 20 can be simplified and the cassette 20 can be provided at low cost. Furthermore, by including the air chamber 50 in the cassette 20, unpleasant noise during suction can be suppressed even though the cassette 20 and the waste liquid bag 20b have a simple structure (the suppression of noise due to the air chamber 50 will be described later). To do).

  Next, the operation state of the suction means 40 will be described with reference to FIGS. 3 and 4 show a state in which a part or a plurality of parts of the suction tube 6 are crushed and ironed by the rotating ironing member 43. FIG. 3 shows a state where the two portions (the closed point C1 and the closed point C2) of the suction tube 6 are crushed by the rotating ironing members 43a and 43b. FIG. 4 is a state in which the turntable 42 is rotated 45 degrees clockwise from the state of FIG. 3, and the suction tube 6 is crushed at one place (blocking point C2) by the rotating wiping member 43b. It is. More specifically, the distance between the ironing member 43a and the tube receiver 44 increases from the state of FIG. 3 to the state of FIG. 4, and the blockage at the blockage point C1 in FIG. On the other hand, with respect to the closing point C2, the distance between the ironing member 43 and the tube receiver 44 does not change from the position of the closing point C2 in FIG. 3 to the position of the closing point C2 in FIG. Therefore, the suction tube 6 is squeezed by the squeezing member 43 from the position of the closing point C2 in FIG. 3 to the position of the closing point C2 in FIG.

  The pressure value of each part of FIG. 3, FIG. 4 is demonstrated. First, the pressure value of each part in FIG. 3 will be described. In FIG. 3, the pressure value at the position indicated by the point Pa is substantially the same as the atmospheric pressure value in the environment where the perfusion suction device 1 is installed because the end portion 21 of the suction tube 6 is opened (FIG. 3 ( b)). In FIG. 3, the pressure values at the positions indicated by the points Pb, Pc, and Pd are lower than the atmospheric pressure value because the suction tube 6 is squeezed by the squeezing member 43 (for example, −650 mmHg). ). The suction pressure value is a relative value with respect to the atmospheric pressure. For example, the suction pressure of −650 mmHg is a pressure indicating 110 mmHg when the atmospheric pressure is 760 mmHg.

  Next, the pressure value of each part in FIG. 4 will be described. The pressure values at the positions indicated by the points Pa, Pc, and Pd in FIG. 4 are the same as those in FIG. 3 (see FIG. 4B). On the other hand, the pressure at the position indicated by the point Pb in FIG. 4 is the same pressure value as the point Pa (approximately the atmospheric pressure value). The reason why the pressure values at the point Pa and the point Pb are the same is that, as described above, the closed state of the closed point C1 of the suction tube 6 is released between the state of FIG. 3 and the state of FIG.

  The release of the blocked state will be described. The suction means 40 generates suction pressure by squeezing the suction tube 6 while squeezing it with the squeezing member 43. Here, when the occlusion point in the state where the suction pressure is generated is released (the occlusion state is released), the suction tube 6 at the occluded position is stressed from the stressed shape of FIG. 8B. The shape is rapidly restored to the shape of FIG. At this time, the waste liquid LQW flows backward from the point Pa where the pressure value is high to the point Pc where the pressure value is low. In other words, at least a part of the waste liquid LQW in the suction tube 6 interposed between the point where the blockage is released and the end portion 21 of the suction tube 6 temporarily flows back. During the suction, the turntable 42 continuously rotates, so that a temporary back flow occurs every time the suction tube 6 is released from being blocked. The reverse flow is not limited to the waste liquid LQW, and the gas or liquid in the waste liquid flow path 9 flows backward.

  Here, the case where the perfusion suction apparatus 1 does not provide the air chamber 50 will be described. As described above, when the suction tube 6 is unblocked, the waste liquid LQW in the suction tube 6 flows backward. As the waste liquid LQW flows backward, at the terminal end 21 of the suction tube 6, the suction force (hereinafter referred to as reverse suction) is directed toward the opening 21a (the rear end of the waste liquid channel 9) of the terminal end 21 of the suction tube 6. Called force). In addition, since the turntable 42 having the plurality of squeezing members 43 rotates, the clogging and release are repeated while the turntable continues to rotate, and a reverse suction force is generated intermittently. Due to the reverse suction force, for example, the gas or liquid in the waste liquid bag 20 b rapidly flows into the waste liquid flow path 9. When gas or liquid rapidly flows back toward the opening 21a, for example, unpleasant noise is generated in the opening 21a of the terminal end 21. Here, for example, as the suction pressure of the suction means 40 increases, the reverse suction force increases, and unpleasant noise becomes more prominent and heard by the surgeon. When the storage bag 22 of the waste liquid bag 20b is sealed except for the opening 21a, the internal pressure of the storage bag 22 changes as liquid or gas enters and exits at the end portion 21 of the suction tube 6. The accommodation bag 22 is deformed by such a change in internal pressure, and there is a possibility that abnormal noise is generated during the deformation. For example, when the suction means 40 performs suction with a suction pressure exceeding 600 mmHg, unpleasant noise may be particularly noticeable. Further, it is considered that an unpleasant noise becomes more remarkable as the rotation speed of the turntable 42 becomes higher.

  Next, the air chamber 50 provided in the perfusion suction device 1 of the present embodiment will be described. The air chamber 50 is provided to suppress the backflow of the waste liquid LQW when the suction tube 6 is released from the blockage. As an example, the air chamber 50 suppresses abnormal noise during suction. FIG. 5A is an external perspective view of the air chamber 50 of the present embodiment, and FIG. 5B is a partial sectional view in the vertical direction in a state where the air chamber 50 is provided in the waste liquid flow path 9. . The air chamber 50 has a piping part 50a and an air chamber part 50b. The piping part 50a is cylindrical. The cylindrical inner diameter is the same as the inner diameter of the suction tube 6. The suction tubes 6 are connected to both ends of the piping part 50a. The air chamber 50b has a cylindrical shape. The interior of the columnar shape is hollowed out to form an air chamber for storing air. The piping part 50a and the air chamber part 50b are connected, and the penetration part of the piping part 50a and the air chamber of the air chamber part 50b communicate with each other. In addition, the air chamber 50 is arrange | positioned in the cassette 20 so that the air chamber of the air chamber part 50b may face upwards. Since silicon is expensive, it is preferable to form the air chamber 50 with resin (ABS resin or the like) or metal. Further, the air chamber 50 may be integrally formed with the same material as the cassette 20.

  A phenomenon in which the back flow of the waste liquid LQW is suppressed by the air chamber 50 will be described with reference to FIG. In FIG. 5B, the location indicated by Ua is the interface of the waste liquid LQW at the time when no back flow occurs. Here, when the backward flow of the waste liquid LQW occurs, the air in the air chamber 50 expands in the direction of the waste liquid LQW (waste liquid flow path 9) as indicated by Ub in FIG. As the air in the air chamber 50 expands, the reverse suction force in the tube decreases, and the reverse flow speed of the waste liquid LQW on the waste liquid bag side becomes slower than the air chamber 50. For example, the backflow of the waste liquid LQW generated at the end portion 21 of the suction tube 6 is suppressed, and unpleasant noise generated at the end portion 21 is suppressed.

  FIG. 6 shows a first modification of the air chamber 50. Fig.6 (a) is the perspective view which looked at the air chamber 51 which is a 1st modification example from diagonally upward. FIG. 6B is a partial sectional view in the vertical direction in a state where the suction tube 6 is connected to the air chamber 51. The air chamber 51 includes a main body 51a and a pair of connection parts (a connection part 51b and a connection part 51c). The main body 51a has a cylindrical shape with the inside substantially the same shape as the appearance thereof, and connecting portions (connecting portions 51b and 51c) are connected to both ends of the cylindrical shape. The suction tube 6 is connected to each connection part 51b and connection part 51c.

  Since both the main body 51a and the pair of connection parts (connection part 51b, connection part 51c) are hollow, they penetrate from one connection part 51b to the other connection part 51c. The inner diameters of the connecting portion 51b and the connecting portion 51c are the same as the inner diameter of the suction tube 6. The inner diameter of the main body 51 a is larger than the inner diameter of the suction tube 6. With this structure, when the waste liquid LQW flows into the air chamber 51, an air region similar to the air chamber 50 described above is created in the air chamber 51, and the back flow of the waste liquid LQW generated in the terminal portion 21 due to the air in the air chamber 51 can be suppressed. .

  FIG. 7 shows a second modification of the air chamber 50. The air chamber 52 of the second modification example has a hollow member 52a and a tube member 52b. As shown in FIG. 7A, the hollow member 52a is a T-shaped member. The hollow member 52a has three ends (52c, 52d, 52e). The tube member 52b is a tube-shaped member. The tube member 52b has one end opened and the other end closed. The hollow member 52a and the tube member 52b may be formed of resin. The suction tube 6 is connected to the two ends (52c, 52d), and the tube member 52b is connected to the remaining end 52e. FIG. 7B is a partial cross-sectional view in the vertical direction with the suction tube 6 connected to the air chamber 52. By disposing the closed portion of the tube member 52b upward, it is possible to suppress the backflow of the waste liquid LQW generated in the end portion 21 as with the air chamber 50 and the air chamber 51.

<Action and effect>
The perfusion suction device 1 of this embodiment includes a supply means 7 for supplying the perfusate LQP into the eye of the patient eye E, and a waste liquid LQW containing the perfusate LQP from the patient eye E by squeezing the elastic member 41 with the squeezing member 43. And a waste liquid passage 9 through which the waste liquid LQW sucked by the suction means 40 flows, and a portion of the waste liquid passage 9 that is squeezed by the suction means 40 (blocking point C1 or blockage). An air chamber 50 is provided between the point C2) and the terminal portion 21 through which the sucked waste liquid LQW is discharged into the gas. By this aspect, for example, the backflow of the waste liquid LQW can be reduced, and unpleasant noise during suction can be suppressed.

  In addition, the perfusion suction device 1 of the present embodiment suppresses abnormal noise during suction generated by the terminal portion 21 of the waste liquid flow path 9 by the air chamber 50. In other words, by suppressing the pressure change of the waste liquid LQW in the waste liquid flow path 9 that occurs when the ironing of the elastic member 41 by the ironing member 43 is released, the waste liquid LQW generated in the end portion 21 of the waste liquid flow path 9 is suppressed. Backflow can be reduced. Such an embodiment can suppress unpleasant noise generated at the end portion 21 of the waste liquid flow path 9. As an example, the surgeon can concentrate on the surgery without worrying about the suction sound.

  The perfusion suction device 1 of the present embodiment includes the main body 10 including the squeezing member 43 and the cassette 20 including the elastic member 41 and detachably attached to the main body 10, and includes the air chamber 50. It is provided in the housing 20 a of the cassette 20. According to such an aspect, it is possible to suppress an increase in size of the main body 10 or the waste liquid bag 20b. For example, unpleasant noise during suction can be suppressed without impairing the handleability of the cassette 20.

  Further, in the perfusion suction device 1 of the present embodiment, a waste liquid bag 20 b is connected to the waste liquid channel 9 outside the housing 20 a of the cassette 20. Such an embodiment can suppress abnormal noise during suction without enlarging the casing 20a of the cassette 20. For example, the storage bag 22 connected to the waste liquid bag 20b is made of a flexible material, and the storage bag 22 may be folded when transported. The volume when the cassette 20 is transported can be reduced, and processing (replacement and disposal) after use of the waste liquid bag 20b is facilitated. The cassette 20 can be easily handled.

  Further, the air chamber 50 of the perfusion suction device 1 of the present embodiment is formed of a material different from silicon. By setting it as this aspect, the air chamber 50 is realizable at low cost. For example, even when the air chamber 50 is included in the cassette 20, the cassette 20 can be manufactured at low cost, and the maintenance cost of the perfusion suction device 1 can be reduced.

  Further, the suction means 40 of the perfusion suction device 1 of the present embodiment can suck the waste liquid LQW from the patient's eye E with a suction pressure exceeding 600 mmHg. Since the perfusion suction device 1 includes the air chamber 50, even if the suction member 40 that sucks the waste liquid LQW from the patient eye E by squeezing the elastic member 41 with the squeezing member 43 performs high suction exceeding 600 mmHg, for example, Surgery can be performed with unpleasant noises suppressed.

  In addition, the cassette 20 of the present embodiment supplies the perfusate LQP into the eye of the patient's eye E and sucks the waste liquid LQW containing the perfusate LQP from the patient's eye E by squeezing the elastic member 41 with the squeezing member 43. The cassette 20 is detachably attached to the perfusion suction device 1, and is squeezed by the squeezing member 43 of the waste liquid flow path 9 through which the waste liquid LQW squeezed and sucked by the squeezing member 43 flows. And an air chamber 50 provided between the portion (the closed point C1 or the closed point C2) and the terminal portion 21 through which the sucked waste liquid LQW is discharged into the gas. According to such an aspect, although the cassette 20 is detachably mounted, unpleasant noise during suction can be suppressed by the air chamber 50 provided in the cassette 20.

  Further, in the cassette 20 of this embodiment, a waste liquid bag 20 b is connected to the waste liquid flow path 9 outside the casing 20 a of the cassette 20. According to such an embodiment, for example, processing (exchange and disposal) after use of the waste liquid bag 20b is easy, and abnormal noise during suction is suppressed.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

5: Perfusion tube 6: Suction tube 7: Supply means 8: Perfusion flow path 9: Waste liquid flow path 20: Cassette 21: Termination 30: Surgical handpiece 40: Suction means 50: Air chamber

Claims (2)

Supply means for supplying perfusate into the eye of the patient's eye;
A perfusion channel through which the perfusate supplied by the supply means flows;
A suction means for squeezing an elastic member with a squeezing member and sucking the waste liquid containing the perfusate from the patient's eye;
A waste liquid flow path through which the waste liquid sucked by the suction means flows;
A bypass channel, one end of which is connected to the perfusion channel and the other end is connected to the channel of the waste fluid channel upstream of the portion squeezed by the suction means;
A control valve for opening and closing the bypass flow path ,
An air chamber is provided between the portion of the waste liquid channel that is squeezed by the suction means and the terminal portion from which the sucked waste liquid is discharged into the gas to reduce abnormal noise during the suction. A perfusion suction device characterized by that. The perfusion suction device according to claim 1,
The perfusion suction apparatus, wherein the suction means is capable of sucking the waste liquid from the patient's eye with a suction pressure exceeding 600 mmHg.

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