JP2015123267A - Suction instrument, and control unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the maintenance work of a suction pump used in a suction device.SOLUTION: A suction instrument (10) includes a storage container (100). The storage container (100) has an inlet port (130a) and an outlet port. The suction instrument (10) also includes: a suction pump (210); a connection member (220) for connecting the suction pump (210) to the storage container (100) so that the suction pump (210) can suck gas inside the storage container (100) through the outlet port; and a mount part for mounting a control unit (300) detachably. The suction pump (210) includes: a connection conductor (212) to be connected to the control unit (300); a piezoelectric element which repeats expansion and contraction by a drive voltage supplied from the control unit (300) through the connection conductor (212); and a diaphragm which vibrates by the expansion and contraction of the piezoelectric element.

Description

  The present invention relates to a suction device for discharging liquid or gas from a body cavity such as a chest cavity.

  2. Description of the Related Art Conventionally, a medical suction device is known for discharging liquid such as blood exuded in a chest cavity of a patient or gas leaked from a lung from the chest cavity. For example, Patent Document 1 discloses a suction device including a liquid storage bag capable of storing a liquid and an aspirator to which the liquid storage bag can be detachably attached. The liquid storage bag includes a liquid storage part for storing liquid, an inflow port for allowing liquid and gas in the body cavity to flow into the liquid storage part via a tube inserted into the body cavity of the patient, and a liquid storage part. And an outflow port for allowing the inflowing gas to flow out of the liquid storage part. The suction device has a suction pump that sucks gas from the liquid storage part via a suction tube connected to the outlet, and an exterior body that houses the suction pump.

  When the suction pump is driven in a state where the tube is inserted into the body cavity of the patient, liquid or gas in the body cavity of the patient flows into the liquid storage part via the inflow port. The liquid that has flowed into the liquid storage part is stored at the bottom of the liquid storage part, while the gas that has flowed into the liquid storage part passes through the outflow port and the suction tube and then passes through the suction pump from the suction pump. Discharged. When the suction treatment for the patient using the suction device is completed, the liquid storage bag is removed from the suction device, and the liquid storage bag is discarded. On the other hand, the suction device including the exterior body and the suction pump is reused. That is, a new liquid storage bag is attached to the suction device, and this suction device is used for suctioning a patient other than the patient.

JP 2004-024333 A

  In the suction device as shown in Patent Document 1, since the suction pump is reused, there is a risk that infection will occur in the patient. Specifically, during the suction treatment using this suction device, the gas in the patient's body cavity is discharged to the outside via the suction pump. Since the gas (gas in the patient's body cavity) sucked by the suction pump often contains a pathogen, the suction pump is reused, so that a plurality of patients are contained in the suction pump. Accumulate various pathogens that flowed out. Here, during the suction treatment, when the pressure in the liquid storage part becomes lower than the suction pressure of the suction pump, the gas flows backward from the suction pump toward the liquid storage part, and the gas is connected to the inlet. May pass through the tube into the patient's body cavity. At this time, the pathogen accumulated in the suction pump flows into the patient currently undergoing the suction treatment, which may cause infection in the patient. In order to prevent such a situation, periodic maintenance work (cleaning or the like) of the suction pump is required. However, this maintenance work is very complicated and troublesome.

  An object of the present invention is to reduce maintenance work of a suction pump used in a suction device.

  As means for solving the above problems, the present invention provides a suction device including a storage container capable of storing a liquid, the storage container including an inlet for allowing the liquid to flow into the storage container; An outlet for allowing the gas flowing into the storage container through the inlet to flow out of the storage container, and the suction device includes a suction pump capable of sucking the gas, and the gas in the storage container. A connecting member for connecting the suction pump to the storage container so that suction can be performed by the suction pump through the outlet; and a mounting portion for detachably mounting the control unit. The pump includes a connection conductor connectable to the control unit, a piezoelectric element that repeats expansion and contraction by a drive voltage supplied from the control unit via the connection conductor, and the piezoelectric element Providing a suction apparatus having a diaphragm that vibrates by extension and contraction.

  In this suction device, the suction pump connected to the storage container via the connection member in order to suck the gas that has flowed into the storage container from the patient's body cavity through the inflow port from the outflow port, However, the suction pump of this suction device is a so-called diaphragm pump having a connecting conductor, a piezoelectric element, and a diaphragm, and has a simple structure. Is suitable. Moreover, the suction device includes a mounting portion, and the mounting portion can be detachably mounted with a control unit that supplies a driving voltage for driving the suction pump (extending and contracting the piezoelectric element). Therefore, by removing the control unit from the suction device, the suction pump, the connection member, and the storage container excluding the control unit can be made disposable, thereby reducing the maintenance work of the suction pump.

  In this case, the suction pump has a discharge port for discharging the gas sucked through the outlet, and the connection member has an area larger than the area of the discharge port and flows out from the outlet. It is preferable to have a filter that captures a pathogen contained therein, and a filter holding unit that holds the filter at a position downstream of the suction pump and at a distance from the suction pump.

  If it does in this way, a pathogen will be captured, suppressing the increase in suction resistance of a suction pump, and generation of clogging of a filter will also be controlled. Specifically, since the filter is held by the filter holding unit on the downstream side of the suction pump, the resistance when the suction pump sucks gas is increased compared to the case where the filter is held on the upstream side of the suction pump. It is suppressed. The area of the filter is larger than that of the discharge port, and since this filter is held at a position spaced downstream from the suction pump, the gas discharged from the discharge port is larger than the area of the discharge port. The filter passes through the filter while contacting the filter of the area. Therefore, the occurrence of clogging of the filter is suppressed.

  Further, in the present invention, the storage container is connected to the inlet and has a storage part having a storage space capable of storing the liquid, and a water sealing part having a suction space connected to the suction pump through the outlet. And the water sealing part has a shape that can be sealed with a water sealing liquid between the suction space and the storage space in the storage part, and the connection member is provided in the connection member. It is preferable to further have an inlet that can inject a water seal liquid, and this inlet is preferably formed at a position where the water seal liquid can be injected into the water seal portion through the inlet and the outlet.

  If it does in this way, in the state where the suction pump was connected to the storage container by the connecting member, it becomes possible to inject the water seal liquid into the water seal part through the inlet and the outlet. In addition, a patient's suction | inhalation treatment using this suction device is attained by obstruct | occluding an injection port.

  In addition, the present invention is a control unit that can be attached to and detached from the suction device and that can control the drive of the suction pump of the suction device, and can be connected to the connection conductor via the connection terminal and the connection terminal. A control plate including a voltage supply unit that supplies the drive voltage to the piezoelectric element of the suction pump; and a holding member that holds the control plate, and the holding member is attached to a mounting portion of the suction device. A mounting portion that can be detachably mounted on the mounting portion can be mounted on the mounting portion in a state where the connection terminal is in contact with the connection conductor. A control unit having a shape is provided.

  In the present invention, the attached portion has a shape that can be attached to the attachment portion in a state where the connection terminal is in contact with the connection conductor, and thus the attachment portion is attached to the attachment portion of the suction device. Thus, a structure in which the connection terminal and the connection conductor are connected to each other is constructed. Therefore, a wiring cable or the like for connecting the connection conductor and the connection terminal is omitted. Then, after the mounting of the holding member to the suction device is completed, the drive voltage is supplied from the voltage supply portion of the control plate to the piezoelectric element via the connection terminal and the connection conductor, so that the suction pump Gas is aspirated. Furthermore, since the mounted portion is detachable from the mounting portion, the control unit can be reused by removing the mounted portion from the mounting portion after the suction treatment for the patient is completed. On the other hand, since the suction device is discarded, maintenance work of the suction pump of the suction device is reduced.

  In this case, the control plate further includes a pressure sensor, and a voltage control unit that controls the drive voltage so that a detection value of the pressure sensor becomes a preset suction pressure, and the holding member is The detection space in which the pressure is detected by the pressure sensor, the exhaust passage from the outlet of the suction device to the suction pump, and the detection space can be connected to the connection member so as to be connected via the inlet. It is preferable that the attached portion has a shape that can be attached to the attachment portion in a state where the connection portion is connected to the connection member.

  In this aspect, the attached portion has a shape that can be attached to the attachment portion in a state where the connecting portion is connected to the connection member, so that the attached portion is simply attached to the attachment portion. The connection terminal and the connection conductor are connected to each other, and the exhaust passage and the detection space communicate with each other. That is, the suction pump can be driven by mounting the mounted portion on the mounting portion. Further, while the suction pump is being driven (during the suction treatment), the voltage control unit controls the driving voltage to control the exhaust flow. The pressure in the tract, that is, the pressure in the body cavity (pressure in the suction space) is maintained at a desired suction pressure. Note that there is a difference between the pressure in the exhaust passage and the pressure in the body cavity (pressure in the suction space) by the pressure of the water seal liquid injected into the water seal portion. Further, during the suction treatment for the patient, the exhaust flow path and the detection space have the same pressure, so the gas flowing out from the outlet flows toward the suction pump along the exhaust flow path without flowing into the detection space, It is discharged outside by the suction pump. Therefore, after the suction treatment is completed, the control unit including the pressure sensor can be reused.

  As described above, according to the present invention, it is possible to reduce the maintenance work of the suction pump used in the suction device.

It is a perspective view of the suction device of one embodiment of the present invention. It is a perspective view in the state where the suction instrument and control unit of the suction device of FIG. 1 were separated. It is sectional drawing of the suction device of FIG. It is sectional drawing which shows the state which the volume change part of the suction device of FIG. 1 deform | transformed. It is an expanded sectional view of the connection part of a storage part main part and a volume change part. It is an expanded sectional view of the vicinity of a connection member. It is sectional drawing which shows the vicinity of a suction pump. It is sectional drawing in the surface which passes a connecting terminal and a to-be-attached part. It is a perspective view of a control unit. It is a figure which shows the fluctuation | variation of the pressure of storage space. It is a flowchart which shows the control content of a control unit.

  A suction device 1 according to an embodiment of the present invention will be described with reference to FIGS. In addition, although the attitude | position at the time of use of this attraction | suction apparatus 1 is not limited to the attitude | position shown by FIGS. 1-4, in the following description, an up-down direction is defined based on FIGS. 1-4.

  As shown in FIGS. 1 and 2, the suction device 1 includes a suction device 10 and a control unit 300 that can be detachably attached to the suction device 10.

  The suction device 10 includes a storage container 100 provided in the middle of a suction line for sucking gas and liquid in a body cavity of a patient, a suction pump 210 (see FIG. 3) capable of sucking gas, and a suction pump 210. And a connecting member 220 for connecting to the storage container 100.

  The storage container 100 includes a storage unit 110 that stores a liquid such as a body fluid of a patient, and a water seal unit 150.

  The storage unit 110 has a storage space 110a capable of storing liquid that has flowed out of the patient's body cavity. The storage unit 110 is configured to be able to change the volume of the storage space 110a. Specifically, as shown in FIGS. 3 and 4, the storage unit 110 includes a storage unit main body 120, an inflow unit 130, and a volume changing unit 140.

  The reservoir main body 120 has a container shape having a substantially rectangular parallelepiped shape. The reservoir main body 120 has a rigidity that maintains its outer shape under atmospheric pressure (does not deform under atmospheric pressure). The storage unit main body 120 is provided at the first partition wall 121, the second partition wall 122 provided at a position separated from the first partition wall 121 in the right direction, and at the position separated from the second partition wall 122 in the right direction. And a third partition wall 123 formed. Each of the partition walls 121 to 123 has a shape extending upward from the bottom of the reservoir main body 120. A first storage chamber 121 a is partitioned between the first partition wall 121 and the side wall of the storage section main body 120, and a second storage chamber 122 a is partitioned between the first partition wall 121 and the second partition wall 122. A third storage chamber 123 a is defined between the second partition wall 122 and the third partition wall 123.

  The inflow part 130 is connected to the upper part of the storage part main body 120. The inflow portion 130 is formed in a cylindrical shape surrounding the inflow port 130a for allowing liquid to flow into the storage space 110a. One end of the tube is connected to the inflow portion 130 so that the inflow port 130a communicates with the inside of the tube such as a catheter. The other end of the tube is inserted into the patient's body cavity.

  The volume changing unit 140 has a lower rigidity than the storage unit main body 120 and has a shape that partitions the storage space 110 a together with the storage unit main body 120. The volume changing unit 140 increases the volume of the storage space 110a when the pressure of the storage space 110a is about to rise above a preset reference pressure (the pressure of the storage space 110a rises above the reference pressure). So that the volume of the storage space 110a is reduced when the pressure of the storage space 110a is about to fall below the reference pressure (the pressure of the storage space 110a is less than the reference pressure). To suppress the decrease).

  The volume changing unit 140 is connected to the storage unit main body 120 so as to be located inside the storage unit main body 120. Specifically, the volume changing unit 140 is configured so that the liquid flowing into the storage unit main body 120 from the inflow port 130a does not interfere with the first storage chamber 121a. It is provided in a region closer to the water seal portion 150 (right side in FIG. 1) than the straight line connecting the one storage chamber 121a.

  In the present embodiment, the volume changing unit 140 is formed in a shape (bag shape) surrounding the buffer space 140a that opens upward. A cylindrical attachment portion 126 is formed on the upper portion of the storage portion main body 120, and an edge portion 142 (see FIG. 5) of the volume changing portion 140 is connected to the attachment portion 126. Specifically, the volume changing unit 140 is attached to the mounting portion 126 so that the space between the volume changing unit 140 and the storage unit main body 120 is sealed and the external space (atmosphere) outside the storage container 100 communicates with the buffer space 140a. It is connected to the. That is, in this embodiment, the storage space 110a is partitioned by the inner surface of the storage unit main body 120 and the inner surface of the volume changing unit 140 (the surface opposite to the surface communicating with the external space). The space surrounded by the edge 142 of the volume changing unit 140 inside the portion 126 constitutes a “through port” that allows the buffer space 140a to communicate with the external space.

  For this reason, in the present embodiment, the volume changing unit 140 pushes the gas in the buffer space 140a to the external space (in the atmosphere) when the pressure in the storage space 110a is about to exceed the reference pressure, and the volume of the buffer space 140a. (See FIG. 4), and when the pressure of the storage space 110a is about to fall below the reference pressure, the buffer space 140a of the buffer space 140a is taken into the buffer space 140a from the external space (in the atmosphere). It expands to increase its volume (see FIG. 3). In the present embodiment, the volume changing unit 140 fits inside the storage unit main body 120 both when the pressure in the storage space 110a is equal to or lower than the reference pressure (FIG. 3) and when the pressure exceeds the reference pressure (FIG. 4). It has a shape. The volume changing unit 140 has rigidity to maintain the shape (the shape in FIG. 3) when the pressure in the storage space 110a is equal to or lower than the reference pressure. In the present embodiment, the volume changing unit 140 is made of polyethylene. The volume of the buffer space 140a is set larger than the volume of the gas that temporarily flows into the reservoir 110 through the inlet 130a when the patient coughs or sneezes.

  As shown in FIG. 10, the reference pressure is higher than the range of pressure fluctuation in the storage space 110a due to the patient's breathing at the normal time A, and temporarily enters the storage unit 110 due to the patient coughing. Is set to a value smaller than the pressure generated in the storage space 110a (hereinafter referred to as “instantaneous pressure”) when a large amount of gas equal to or higher than A flows in at normal time and the volume changing unit 140 is not deformed. The Since the gas in the storage container 100 is sucked by the suction pump 210 during the steady time A, the pressure in the storage space 110a at the steady time A is negative with respect to the pressure (atmospheric pressure) in the external space. It becomes. Here, the instantaneous pressure is larger than the atmospheric pressure, and in the present embodiment, the buffer space 140a communicates with the atmosphere, so this reference pressure is set to the atmospheric pressure.

  In the present embodiment, the volume changing unit 140 is connected to the attachment unit 126 by the inner plug 160, the O-ring 170, and the lid unit 180.

  The inner plug 160 includes a cylindrical portion 162 that is press-fitted into the attachment portion 126, a protruding portion 164 that protrudes outward from the cylindrical portion 162, and a placement portion 166 on which the O-ring 170 is placed. When the tube portion 162 is press-fitted into the mounting portion 126, the space between the tube portion 162 and the mounting portion 126 is sealed, and the back surface of the protruding portion 164 contacts the upper end of the mounting portion 126. The mounting portion 166 is connected to the upper portion of the cylindrical portion 162 and the protruding portion 164.

  The lid portion 180 includes a pressing portion 182 that presses the O-ring 170, an engaging portion 184 that engages with the protruding portion 164, and a shielding portion 186. The pressing part 182 has a flat plate shape having an outer diameter that is slightly larger than the inner plug 160, and has a hole penetrating in the vertical direction at the center thereof. The engaging part 184 has a shape extending downward from the outer peripheral edge of the pressing part 182. When the engaging portion 184 is engaged with the protruding portion 164, the O-ring 170 is sandwiched between the back surface of the pressing portion 182 and the upper surface of the mounting portion 166. Thereby, between the volume change part 140 and the storage part main body 120 is sealed. The shielding part 186 has a shape orthogonal to the axial direction of the attachment part 126. The shielding part 186 has a pressing part 182 such that an opening 186 a that allows gas to flow between the external space and the buffer space 140 a in the volume changing part 140 is formed between the shielding part 186 and the pressing part 182. It is formed at a position spaced apart upward. The opening 186a is set to a size that allows gas to flow between the external space and the buffer space 140a in the volume changing unit 140 and prevents the insertion of a finger.

  The water sealing part 150 includes a communication part 152 having a communication space 152a, a suction part 154 having a suction space 154a, and an outflow part 156 having an outflow port 156a.

  The communication portion 152 has a shape that divides the communication space 152a so that the upper portion of the communication space 152a and the upper portion of the storage space 110a are connected in the left-right direction. Specifically, the communication part 152 has a tubular shape extending in the up-down direction.

  The suction part 154 has a shape that partitions the suction space 154a so that the lower part of the suction space 154a and the lower part of the communication space 152a are connected in the left-right direction. Specifically, the suction part 154 has a tubular shape extending in the vertical direction.

  The outflow part 156 is connected to the upper part of the suction part 154. The outflow portion 156 is formed in a cylindrical shape surrounding the outflow port 156a for allowing the gas in the suction space 154a to flow out of the storage container 100. In this embodiment, the outflow part 156 is formed in a cylindrical shape having an axis parallel to the vertical direction.

  An amount of aseptic distilled water W (water seal liquid) that can cut off the connection between the communication space 152a and the suction space 154a is injected into the water seal portion 150 through the outlet 156a, thereby connecting the communication space 152a and the storage space 110a. The space between the suction space 154a is sealed with water.

  As shown in FIGS. 2, 6, and 7, the suction pump 210 is connected to the control unit 300, the connection conductor 212, the piezoelectric element 214 connected to the connection conductor 212, and the piezoelectric element 214. A diaphragm 216 and a casing 218 are provided. That is, the suction pump 210 of the present embodiment is a so-called diaphragm pump.

  The base end of the connection conductor 212 is connected to the piezoelectric element 214. The distal end portion of the connection conductor 212 has a flat upper surface 212a. The top surface 212 a of the tip is connected to the control unit 300.

  The piezoelectric element 214 repeats expansion and contraction by a drive voltage supplied from the control unit 300 via the connection conductor 212.

  The diaphragm 216 vibrates as the piezoelectric element 214 expands and contracts.

  The casing 218 holds the connection conductor 212, the piezoelectric element 214, and the diaphragm 216. More specifically, the casing 218 holds the connection conductor 212 so as to surround the piezoelectric element 214 and the diaphragm 216 and also exposes the tip of the connection conductor 212. An intake port 218a for sucking gas is formed at the bottom of the casing 218, and a discharge port 218b is formed at the top of the casing 218 for discharging gas. When the diaphragm 216 vibrates, the gas flowing into the casing 218 from the intake port 218a is discharged from the discharge port 218b.

  The connection member 220 allows the gas in the storage container 100 to be sucked by the suction pump 210 through the outflow port 156a and allows the aseptic distilled water W to be injected into the water seal 150 through the outflow port 156a. It is a member for connecting to the storage container 100. Specifically, the connection member 220 includes a connector 230 connected to the storage container 100, a base 240 coupled to the connector 230, a cover 260 coupled to the base 240, and a filter 270 capable of capturing pathogens and the like. Have

  The connector 230 includes a connected portion 234 connected to the outflow portion 156 and a peripheral wall 232 connected to the connected portion 234. The connected portion 234 has a shape that can be press-fitted into the outflow portion 156 of the storage container 100. Specifically, the connected portion 234 has an outer diameter that is slightly smaller than the inner diameter of the outflow portion 156 and is formed in a cylindrical shape surrounding the connection port 234a. The peripheral wall 232 has a shape that widens the connection port 234a. Specifically, the peripheral wall 232 has a rectangular cylindrical shape surrounding the connected portion 234 on the outside. As shown in FIG. 7, a mounting portion 236 to which the control unit 300 can be detachably mounted is formed on the peripheral wall 232.

  The base 240 includes a support portion 244 that supports the suction pump 210, an injection port 246 a that enables injection of sterile distilled water W (water seal liquid) into the connection member 220, and a coupling wall 242. In the present embodiment, the suction pump 210 is supported by the support portion 244 via an elastic sheet 250 that seals between the suction pump 210 and the support portion 244. The injection port 246a has a shape penetrating the base 240 in the vertical direction. The coupling wall 242 can be coupled to the peripheral wall 232 in such a manner that the suction pump 210 is supported by the support portion 244 at a position shifted in the left-right direction with respect to the connection port 234a, and the injection port 246a overlaps the connection port 234a in the vertical direction. Has a shape. Specifically, the coupling wall 242 is formed in a rectangular tube shape that surrounds the support portion 244 and the injection port 246 a and can be coupled to the upper end portion of the peripheral wall 232 of the connector 230. The coupling wall 242 is coupled to the peripheral wall 232, and the connected portion 234 is connected to the outflow portion 156, whereby an exhaust passage from the outflow port 156a to the suction pump 210 is formed, whereby the suction space by the suction pump 210 is formed. The gas 154a can be sucked and sterile distilled water W can be injected into the water seal 150 through the inlet 246a and the outlet 156a.

  Cover 260 is coupled to base 240 so as to cover suction pump 210. Specifically, the cover 260 is press-fitted into a region of the base 240 on the support portion 244 and inside the coupling wall 242. The cover 260 has a discharge port 260a for discharging the gas discharged from the suction pump 210 to the outside. In the present embodiment, the cover 260 includes a pressing unit 262 that presses the suction pump 210 against the support unit 244 and a filter holding unit 264 that holds the filter 270. The pressing portion 262 sandwiches the suction pump 210 from both sides in the vertical direction together with the support portion 244 in a state where the cover 260 is coupled to the base 240. The filter holding part 264 is formed between the pressing part 262 and the discharge port 260a, that is, downstream of the suction pump 210. The filter holding unit 264 holds the peripheral edge of the filter 270. The area of the filter 270 in a state where the filter holding unit 264 holds the filter 270 is set to be larger than the opening area of the discharge port 218b. For this reason, the gas discharged from the discharge port 218b spreads in the space between the filter holding portion 264 and the pressing portion 262, in other words, between the filter 270 and the upper surface of the casing 218, and then the entire surface of the filter 270. Passes through the filter 270 in contact with the filter. The filter 270 is attached to the filter holding part 264 by adhesion or the like.

  The control unit 300 is detachable with respect to the suction device 10 and is a unit that mainly controls driving of the suction pump 210. Specifically, the control unit 300 includes a control plate 310 and a holding member 320 that holds the control plate 310 and is detachable from the suction device 10.

  As shown in FIGS. 8 and 9, the control plate 310 includes a substrate 312 on which a printed circuit is formed, a connection terminal 314 connected to the substrate 312, and a pressure sensor 316 mounted on the substrate 312. Yes.

  The printed circuit formed on the substrate 312 includes a voltage supply unit 312 a that supplies the drive voltage to the piezoelectric element 214.

  The connection terminal 314 has a shape that can be connected to the connection conductor 212 of the suction pump 210. Specifically, the connection terminal 314 has a shape extending downward from the upper end portion of the substrate 312 so as to come into contact with the upper surface 212a of the distal end portion of the connection conductor 212 from above. When the lower end of the connection terminal 314 comes into contact with the upper surface 212a of the distal end portion of the connection conductor 212, the printed circuit and the piezoelectric element 214 are electrically connected.

  In the present embodiment, the operation switch 317, the display element 318, the battery 319 (FIG. 8), and the like are further mounted on the substrate 312. The operation switch 317 is an element for setting the suction pressure. The display element 318 is an element that displays a suction pressure or the like. The battery 319 is an element that supplies electric power to a printed circuit formed on the substrate 312 and an element mounted on the substrate 312.

  The holding member 320 has a holding member main body 322 that holds the substrate 312, an overhanging wall 324 that protrudes from the holding member main body 322, a demarcating portion 326, a connecting portion 328, and an attached device that can be attached to and detached from the suction device 10. Part 330.

  The holding member main body 322 holds the substrate 312 in a posture in which the lower end of the connection terminal 314 is exposed.

  The projecting wall 324 has a shape projecting from the upper side of the holding member main body 322 toward the opposite side (right side in FIG. 7) from the side where the display element 318 is mounted in the direction parallel to the thickness direction of the substrate 312. . The overhanging wall 324 has an exhaust port 324a for releasing the gas discharged from the suction pump 210 to the outside. The exhaust port 324 a communicates with the discharge port 260 a of the cover 260.

  The defining unit 326 defines a detection space S in which pressure is detected by the pressure sensor 316. The demarcating portion 326 may be a tube or the like surrounding the detection space S.

  The connecting portion 328 has a shape that connects the defining portion 326 and the base 240 so that the detection space S and the exhaust flow path are connected. Specifically, as shown in FIG. 8, the connecting portion 328 is formed in a cylindrical shape having an axis that can be press-fitted into the inlet 246 a of the base 240 and extends in a direction parallel to the vertical direction. The connecting portion 328 is held by the overhang wall 324. One end of the connecting portion 328 is connected to the defining portion 326, and the other end of the connecting portion 328 is press-fitted into the injection port 246a. In the present embodiment, the connecting portion 328 is press-fitted into the inlet 246a so that the O-ring 329 is sandwiched between the outer peripheral surface of the connecting portion 328 and the inner peripheral surface surrounding the inlet 246a. Thereby, the space between the connecting portion 328 and the inlet 246a is sealed, so that the inlet 246a is blocked from the external space, and the exhaust passage and the detection space S are communicated. In this state, the pressure in the detection space S is equal to the pressure in the suction space 154a or the exhaust passage. For this reason, the pressure sensor 316 detects the pressure in the suction space 154a or the exhaust flow path, that is, the pressure in the body cavity of the patient. Note that there is a difference between the pressure in the suction space 154a or the exhaust passage and the pressure in the body cavity of the patient (pressure in the storage space 110a) by the pressure due to the sterile distilled water W in the water seal 150, In the following description, these are assumed to be equal. Further, since the pressure in the detection space S is equal to the pressure in the exhaust passage, the gas flowing out from the suction space 154a flows along the exhaust passage without flowing into the detection space S, and passes through the suction pump 210 and the filter 270. Via, it is discharged from the exhaust port 324a to the outside.

  The printed circuit further includes a voltage control unit 312b. The voltage control unit 312b controls the value of the drive voltage supplied by the voltage supply unit 312a so that the detection value of the pressure sensor 316 becomes a suction pressure set in advance by the operation of the operation switch 317. That is, the value of the drive voltage is feedback controlled based on the value detected by the pressure sensor 316.

  The attached portion 330 has a shape that can be detachably attached to the connector 230 of the suction device 10. The mounted portion 330 has a shape extending downward from the end of the overhang wall 324 opposite to the side connected to the holding member main body 322. Specifically, the mounted portion 330 is connected to the mounting portion 236 in a mounted state in which the lower end of the connection terminal 314 is in contact with the upper surface 212a of the distal end portion of the connection conductor 212 and the connecting portion 328 is connected to the inlet 246a. It has a shape that can be mounted. In the present embodiment, as shown in FIGS. 7 and 8, the mounted portion 330 has an engaging portion 332 that engages with the mounting portion 236 in the mounted state. The mounted portion 330 is displaceable between an engaging posture in which the engaging portion 332 engages with the mounting portion 236 in the mounting state and a releasing posture in which the engaging portion 332 is detached from the mounting portion 236 in the mounting state. It has become.

  Next, a method for manufacturing the suction device 1 will be described.

  First, the suction pump 210 is fixed to the connection member 220. Specifically, the base 240 is coupled to the connector 230, and the suction pump 210 is supported on the support portion 244 of the base 240 via the elastic sheet 250. The cover 260 is coupled to the base 240 in a state where the filter 270 is held by the filter holding portion 264 of the cover 260.

  Then, the connection member 220 is connected to the outflow part 156 of the storage container 100. Specifically, the connected portion 234 of the connector 230 is press-fitted into the outflow portion 156.

  Then, the usage method of this suction device 1 is demonstrated.

  First, aseptically distilled to the water seal 150 through the inlet 246a of the base 240, the connection port 234a of the connector 230, and the outlet 156a so that the space between the communication space 152a and the storage space 110a and the suction space 154a is sealed with water. Water W (water sealing liquid) is injected.

  Thereafter, the control unit 300 is attached to the suction device 10. Specifically, the control unit 300 is located above the suction device 10 so that the lower end of the connection terminal 314 is in contact with the upper surface 212a of the distal end portion of the connection conductor 212 and the connecting portion 328 is press-fitted into the inlet 246a. Can be approached from. The mounted portion 330 is mounted on the mounting portion 236 in a mounting state in which the lower end of the connection terminal 314 is in contact with the upper surface 212a of the distal end portion of the connection conductor 212 and the connecting portion 328 is press-fitted into the injection port 246a. Thus, the mounted portion 330 is brought into the engagement posture. As a result, the suction pump 210 can be driven, and further, the voltage control unit 312b controls the drive voltage while the suction pump 210 is being driven (during the suction treatment), whereby the pressure of the detection space S (in the body cavity of the patient) The pressure can be controlled to be a desired suction pressure.

  Next, one end of a tube such as a catheter is connected to the inlet 130a, and the tube is closed with a clamp or the like. Thereby, the storage space 110a is blocked from the external space (outside air). A desired suction pressure is set by operating the operation switch 317. The suction pressure is a value lower than the reference pressure (atmospheric pressure in this embodiment).

  In this state, the drive voltage is supplied from the voltage supply unit 312a to the suction pump 210. Then, since the suction pump 210 is driven, the pressure in the storage space 110a approaches a suction pressure equal to or lower than the reference pressure. In this state, the other end of the tube is inserted into a patient's body cavity (such as a chest cavity), and the clamp is removed. Then, liquid or gas in the patient's body cavity flows into the reservoir main body 120 through the inflow port 130a, and the pressure in the patient's body cavity becomes equal to the pressure in the storage space 110a. The liquid that has flowed into the storage unit main body 120 is stored in the bottom of the storage unit main body 120 (the first storage chamber 121a to the third storage chamber 123a). On the other hand, the gas flowing into the storage unit main body 120 becomes bubbles and passes through the sterile distilled water W of the water seal 150, and then passes through the suction space 154a and the outlet 156a along the exhaust flow path, that is, suction. The gas is exhausted from the exhaust port 324a through the pump 210 and the filter 270.

  While the suction pump 210 is being driven (during the suction treatment), the voltage control unit 312b controls the drive voltage, whereby the pressure in the detection space S (suction space 154a), that is, the pressure in the body cavity of the patient is set to the preset suction pressure. It is controlled to become. Specifically, as shown in FIG. 11, when the suction pressure is set by operating the operation switch 317 (step ST11), the voltage control unit 312b is driven by the voltage supply unit 312a to be supplied to the suction pump 210. The voltage is controlled (adjusted) (step ST12). Thereafter, the pressure sensor 316 detects the pressure in the detection space S (suction space 154a), that is, the pressure in the body cavity of the patient (step ST13). The voltage control unit 312b that has received the detection value of the pressure sensor 316 controls the drive voltage that the voltage supply unit 312a supplies to the suction pump 210 so that the difference between the detection value and the suction pressure becomes zero ( Adjustment) (step ST12).

  Here, during the suction treatment using the suction device 1, the patient temporarily coughs into the reservoir main body 120 from the inflow port 130 a due to coughing, etc. When the gas flows in (a larger amount), the pressure in the storage space 110a increases (see FIG. 10). In the present suction device 1, the storage space 110 a becomes a positive pressure state as the pressure of the storage space 110 a increases at this time, and the storage space 110 a becomes a negative pressure state as the pressure decreases thereafter. It is suppressed by the deformation of the volume changing unit 140. Specifically, the volume changing unit 140 increases the volume of the storage space 110a when the pressure of the storage space 110a is about to exceed the reference pressure (atmospheric pressure in this embodiment) due to the patient coughing or the like. Thus, the storage space 110a is restrained from being in a positive pressure state because it is deformed (so as to suppress an increase in pressure in the storage space 110a). More specifically, as shown in FIG. 10, the pressure in the storage space 110a is the reference pressure during the period B in which a larger amount of gas flows into the storage space 110a than in the stationary time A due to the patient coughing. Then, the volume changing unit 140 is deformed (shrinks) so as to push the gas having the same volume as that of the gas flowing into the storage space 110a thereafter from the buffer space 140a to the external space (in the atmosphere) (see FIG. 4) The pressure in the storage space 110a is maintained at the reference pressure. Further, after a large amount of gas temporarily flows into the storage space 110a (after the patient coughs, etc.), the gas flows out from the storage space 110a to the outside of the storage unit 110 (inside the patient's body cavity) through the inlet 130a. Thus, when the pressure in the storage space 110a is about to fall below the reference pressure, the volume changing unit 140 is deformed so as to reduce the volume of the storage space 110a (so as to suppress a decrease in the pressure in the storage space 110a). The storage space 110a is suppressed from being in a negative pressure state. More specifically, as shown in FIG. 10, after a large amount of gas temporarily flows into the storage space 110a (after period B), the gas flows out of the storage space 110a into the patient's body cavity through the inflow port 130a. During the period C, the volume changing unit 140 is deformed (expands) so that the gas having the same volume as that of the gas is taken into the buffer space 140a from the external space (in the atmosphere), so that the pressure in the storage space 110a is increased. The reference pressure is maintained. That is, while the volume changing unit 140 is expanding, the pressure in the storage space 110a does not decrease. Then, after the volume changing unit 140 has completely expanded during this period C, that is, after the volume changing unit 140 returns to the shape when it is below the reference pressure (FIG. 3), the gas flows out from the storage space 110a into the body cavity. Accordingly, the pressure in the storage space 110a decreases. In this period C, a gas of almost the same amount as the gas flowing into the storage space 110a from the patient's body cavity in the period B flows out from the storage space 110a into the patient's body cavity. Therefore, after the period C ends, the pressure in the storage space 110a (the pressure in the body cavity of the patient) returns to a state that is substantially the same as the state at the stationary time A before the period B is reached. Therefore, it is suppressed that the storage space 110a becomes a positive pressure state and a negative pressure state.

  In addition, when the storage container 100 is used, a tube is connected to the inflow portion 130 and the water seal portion 150 is sealed with water, so that the storage space 110a is blocked from the external space (in the atmosphere) of the storage portion 110. Therefore, the occurrence of infection between the patient and other people is suppressed.

  That is, in the present storage container 100, the volume changing unit 140 that can change the volume of the storage space 110a is provided in a part of the storage unit 110 having the storage space 110a that is blocked from the external space at the time of use. Both the occurrence of infection between the person and the other person and the storage space 110a becoming a positive pressure state and a negative pressure state are suppressed.

  Further, in the present embodiment, the volume changing unit 140 has rigidity to maintain the shape when the pressure in the storage space 110a is equal to or lower than the reference pressure, and the reference pressure is higher than the instantaneous pressure. Since it is set to a value that is small and higher than the range of pressure fluctuations in the storage space 110a accompanying the patient's steady-state breathing A, the volume changing unit 140 does not deform depending on the patient's steady-state breathing. For this reason, for example, by stopping the suction of the gas in the storage container 100 by the suction pump 210, it is enclosed in the water seal 150 by the amount corresponding to the pressure fluctuation of the storage space 110a accompanying the breathing of the patient at the normal time A. The level of the sterile distilled water W that is present moves up and down. Therefore, it is possible to confirm the presence or absence of so-called respiratory movement while suppressing the storage space 110a from being in a positive pressure state or a negative pressure state.

  Further, in the present embodiment, even when the patient coughs in addition to the stationary time A, the volume changing unit 140 is placed inside the storage unit main body 120 having rigidity higher than that of the volume changing unit 140. In other words, since the volume changing unit 140 is protected by the storage unit main body 120, damage to the volume changing unit 140 is suppressed. In addition, it is possible to prevent the occurrence of a problem that deformation that increases the volume of the storage space 110a by the volume changing unit 140 is hindered by an obstacle or the like outside the storage unit main body 120.

  In the present embodiment, the volume changing unit 140 is in contact with both the storage space 110a and the external space (atmosphere). Therefore, the storage space 110a is in the over-positive pressure state and the over-negative pressure state only by setting the reference pressure to an arbitrary value that is smaller than the instantaneous pressure and equal to or greater than the pressure (atmospheric pressure) of the external space. It is suppressed.

  Moreover, since the storage container 100 of this embodiment has the cover part 180 which has the shielding part 186 and the opening 186a, the deformation | transformation of the volume change part 140 is not inhibited, The buffer space in the volume change part 140 from external space The entry of foreign matter into 140a is suppressed.

  Further, in the present suction device 1, the gas flowing into the storage container 100 from the patient's body cavity through the inflow port 130 a is sucked from the outflow port 156 a by the suction pump 210 connected to the storage container 100 through the connection member 220. The For this reason, although the pathogen and the like sucked from the body cavity of the patient may be accumulated in the suction pump 210, the suction pump 210 of the suction device 10 includes the connection conductor 212 and the piezoelectric element 214. And a so-called diaphragm pump having a diaphragm 216 and having a simple structure, is suitable for disposable use. Moreover, the suction device 10 includes a mounting portion 236, which can detachably attach a control unit 300 that supplies a driving voltage for driving the suction pump 210 (extending and contracting the piezoelectric element 214). It can be installed. Therefore, by removing the control unit 300 from the present suction device 10, the suction pump 210, the connecting member 220, and the storage container 100 excluding the control unit 300 can be made disposable, whereby maintenance work of the suction pump 210 can be performed. Reduced.

  Further, in the suction device 10 of the present embodiment, pathogens are captured while suppressing an increase in suction resistance of the suction pump 210, and the occurrence of clogging of the filter 270 is also suppressed. Specifically, since the filter 270 is held by the filter holding unit 264 on the downstream side of the suction pump 210, the suction pump 210 sucks gas compared to the case where the filter 270 is held on the upstream side of the suction pump 210. Increase in resistance is suppressed. Since the area of the filter 270 is larger than that of the discharge port 218b and the filter 270 is held at a position spaced downstream from the suction pump 210, the gas discharged from the discharge port 218b The filter 270 passes through the filter 270 in contact with the filter 270 having an area larger than the area of 218b. Therefore, occurrence of clogging of the filter 270 is suppressed.

  Further, according to the suction device 10 of the present embodiment, aseptic suction water W (water sealing liquid) can be injected into the water sealing portion 150 in a state where the suction pump 210 is connected to the storage container 100 by the connecting member 220. It becomes. Specifically, since the connection member 220 has an inlet 246a formed at a position overlapping with the outlet 156a of the storage container 100 in the vertical direction, sterile distilled water W (water-sealed) is passed through the inlet 246a and the outlet 156a. Injection of the liquid) into the water seal 150 is allowed. Note that when the patient is aspirated using the suction device 10, the injection port 246 a is closed by the control unit 300, so that the gas in the storage container 100 can be sucked by the suction pump 210.

  Further, the mounted portion 330 of the control unit 300 of the present embodiment has a shape that can be mounted to the mounting portion 236 in a state where the connection terminal 314 is in contact with the connection conductor 212. A structure in which the connection terminal 314 and the connection conductor 212 are connected to each other is constructed only by mounting 330 on the mounting portion 236 of the suction device 10. Therefore, a wiring cable or the like for connecting the connection conductor 212 and the connection terminal 314 is omitted. Then, after the attachment of the control unit 300 to the suction device 10 is completed, a driving voltage is supplied from the voltage supply unit 312a of the control plate 310 to the piezoelectric element 214 via the connection terminal 314 and the connection conductor 212. The gas in the storage container 100 is sucked by the suction pump 210. Furthermore, since the mounted part 330 is detachable from the mounting part 236, the mounted unit 330 is removed from the mounting part 236 after the suction treatment for the patient is completed, so that the control unit 300 can be reused. It becomes possible. On the other hand, since the suction device 10 (the storage container 100, the suction pump 210, and the connection member 220) is discarded, the maintenance work of the suction pump 210 of the suction device 10 is reduced.

  Further, the mounted portion 330 has a shape that can be mounted on the mounting portion 236 in a state where the connecting portion 328 is connected to the inlet 246a of the connecting member 220. The connection terminal 314 and the connection conductor 212 are connected to each other only by being attached to the portion 236, and the exhaust passage and the detection space S are communicated. That is, when the mounted portion 330 is mounted on the mounting portion 236, the suction pump 210 can be driven, and further, the voltage control unit 312b controls the drive voltage while the suction pump 210 is being driven (during suction treatment). By doing so, the pressure of the exhaust passage (pressure in the body cavity) is maintained at a desired suction pressure. During the suction treatment for the patient, the exhaust flow path and the detection space S have the same pressure, so that the gas flowing out from the outflow port 156a does not flow into the detection space S and flows into the suction pump 210 along the exhaust flow path. It flows toward the outside and is discharged to the outside by the suction pump 210. That is, since the gas sucked from the body cavity of the patient does not flow into the control unit 300, the control unit 300 including the pressure sensor 316 can be reused after the suction treatment is completed.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the above embodiment, the volume changing unit 140 has a shape that fits inside the storage unit main body 120 both when the pressure of the storage space 110a is lower than the reference pressure and when the pressure is higher than the reference pressure. Although an example has been shown, the volume changing unit 140 fits inside the storage unit main body 120 when the pressure in the storage space 110a is lower than the reference pressure, and the pressure in the storage space 110a tends to increase above the reference pressure. When it does, it may be connected to the storage part main body 120 so that it may bulge outside the storage part main body 120. Alternatively, the volume changing unit 140 is located outside the storage unit main body 120 when the pressure of the storage space 110a is lower than the reference pressure and when the pressure is to be increased above the reference pressure. 120 may be connected. In this case, when the pressure in the storage space 110a is lower than the reference pressure, the volume changing unit 140 is in a state of being deflated so as to minimize the buffer space 140a.

  Moreover, in the said embodiment, although the example in which the volume change part 140 was fixed to the storage part main body 120 via the inner plug 160 and the O-ring 170 was shown, the volume change part 140 is stored via an adhesive agent etc. It may be adhered to the part main body 120 or may be integrally formed with the storage part main body 120. In this case, the inner plug 160 and the O-ring 170 are omitted.

  Moreover, in the said embodiment, although the attachment part 126 of the storage part main body 120 showed the example provided in the upper part of the said storage part main body 120, this attachment part 126 is provided in the side wall of the storage part main body 120. May be.

  Further, in the above-described embodiment, an example in which the connection member 220 includes the mounting portion 236 is shown, but the mounting portion may be provided in the storage container 100. In this case, the mounting portion is preferably provided on the upper portion of the storage container 100 or the outer surface of the water seal portion 150.

  In the above-described embodiment, the example in which the suction pressure is set by the operation of the operation switch 317 is shown, but the method for setting the suction pressure is not limited to this. For example, the substrate 312 may include a receiving unit that can receive a signal transmitted from an external transmitter (such as a remote controller), and the suction pressure may be set by a signal from the transmitter. Alternatively, the storage container 100 may include a suction pressure setting unit that can set the suction pressure in addition to the storage unit 110 and the water seal unit 150. The suction pressure setting unit is connected to the suction space 154a and has a suction pressure setting space in which the suction pressure can be set. The suction pressure setting section is provided with a suction space 154a and a communication pipe that connects the suction pressure setting space and the external space, and a liquid such as sterile distilled water injected into the suction pressure setting space through the communication pipe. The suction pressure is set according to the amount.

DESCRIPTION OF SYMBOLS 1 Suction apparatus 10 Suction instrument 100 Storage container 110 Storage part 110a Storage space 120 Storage part main body 130 Inflow part 130a Inlet 140 Volume change part 140a Buffer space 142 Edge part 150 Water seal part 152 Connection part 152a Connection space 154 Suction part 154a Suction Space 156 Outflow portion 156a Outflow port 210 Suction pump 212 Connection conductor 214 Piezoelectric element 216 Diaphragm 218 Casing 218a Suction port 218b Discharge port 220 Connection member 230 Connector 236 Mounting unit 240 Base 246a Inlet 250 Elastic sheet 260 Cover 264 Filter holding unit 270 Filter 300 Control Unit 310 Control Board 312 Substrate 312a Voltage Supply Unit 312b Voltage Control Unit 316 Pressure Sensor 320 Holding Member 322 Holding Member Body 326 Partition Part 328 Connection part 330 Mounted part S Detection space W Aseptic distilled water (water seal liquid)

Claims (6)

A suction device having a storage container capable of storing liquid,
The storage container has an inflow port for allowing the liquid to flow into the storage container, and an outflow port for allowing gas that has flowed into the storage container through the inflow port to flow out of the storage container. ,
The suction device includes a suction pump capable of sucking a gas, and a connection member for connecting the suction pump to the storage container so that the gas in the storage container can be sucked by the suction pump through the outlet. A mounting portion for detachably mounting the control unit; and
The suction pump includes a connection conductor connectable to the control unit, a piezoelectric element that repeats expansion and contraction by a drive voltage supplied from the control unit via the connection conductor, and expansion and contraction of the piezoelectric element. A suction device having a vibrating diaphragm. The suction device according to claim 1,
The suction pump has a discharge port for discharging the gas sucked through the outlet;
The connection member has a larger area than the discharge port and captures a pathogen contained in the gas flowing out from the outlet, and is separated from the suction pump on the downstream side of the suction pump. And a filter holding part for holding the filter at the position. The suction device according to claim 1 or 2,
The storage container includes a storage portion having a storage space connected to the inflow port and capable of storing the liquid, and a water sealing portion having a suction space connected to the suction pump through the outflow port,
The water seal part has a shape that can be sealed with a water seal liquid between the suction space and the storage space in the storage part,
The connecting member further includes an inlet that can inject the water seal liquid into the connection member, and the inlet can inject the water seal liquid into the water seal portion through the inlet and the outlet. A suction device that is formed in various positions. A control unit detachable from the suction device according to claim 3 and capable of controlling the drive of the suction pump of the suction device,
A control board including a connection terminal connectable to the connection conductor and a voltage supply unit for supplying the drive voltage to the piezoelectric element of the suction pump through the connection terminal;
A holding member for holding the control plate,
The holding member has a mounted portion that can be detachably mounted to a mounting portion of the suction device, and the mounted portion is in a state where the connection terminal is in contact with the connection conductor. A control unit having a shape that can be mounted on the mounting portion. The control unit according to claim 4,
The control plate further includes a pressure sensor, and a voltage control unit that controls the drive voltage so that a detection value of the pressure sensor becomes a preset suction pressure,
The holding member is connected to the detection space in which the pressure is detected by the pressure sensor, the exhaust passage from the outflow port of the suction device to the suction pump, and the detection space are connected via the injection port. A connecting portion connectable to the member,
The attached portion is a control unit having a shape that can be attached to the attachment portion in a state where the connection portion is connected to the connection member. A control unit that can be attached to and detached from the suction device according to claim 1 or 2 and that can control driving of a suction pump of the suction device,
A control board including a connection terminal connectable to the connection conductor and a voltage supply unit for supplying the drive voltage to the piezoelectric element of the suction pump through the connection terminal;
A holding member for holding the control plate,
The holding member has a mounted portion that can be detachably mounted to a mounting portion of the suction device, and the mounted portion is in a state where the connection terminal is in contact with the connection conductor. A control unit having a shape that can be mounted on the mounting portion.

Images