WO2023149342A1 - 気泡検出装置及び輸液ポンプ - Google Patents

気泡検出装置及び輸液ポンプ Download PDF

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Publication number
WO2023149342A1
WO2023149342A1 PCT/JP2023/002457 JP2023002457W WO2023149342A1 WO 2023149342 A1 WO2023149342 A1 WO 2023149342A1 JP 2023002457 W JP2023002457 W JP 2023002457W WO 2023149342 A1 WO2023149342 A1 WO 2023149342A1
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WIPO (PCT)
Prior art keywords
tube
detection device
air bubble
bubble detection
groove
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Application number
PCT/JP2023/002457
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English (en)
French (fr)
Japanese (ja)
Inventor
勇希 國松
順 井出
Original Assignee
テルモ株式会社
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Publication date
Application filed by テルモ株式会社 filed Critical テルモ株式会社
Priority to JP2023578523A priority Critical patent/JPWO2023149342A1/ja
Publication of WO2023149342A1 publication Critical patent/WO2023149342A1/ja

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/36—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests with means for eliminating or preventing injection or infusion of air into body

Definitions

  • the present disclosure relates to an air bubble detection device and an infusion pump.
  • Patent Literature 1 discloses a guide housing an infusion tube to prevent ultrasonic waves generated from an ultrasonic wave transmitting element from circling around parts other than the infusion tube when detecting air bubbles using an air bubble sensor.
  • An infusion pump is disclosed in which a recess is provided in the groove bottom of the groove.
  • An object of the present disclosure which has been made in view of such circumstances, is to provide an air bubble detection device and an infusion pump that improve the usefulness of technology for detecting air bubbles in an infusion tube attached to an infusion pump.
  • An air bubble detection device is an air bubble detection device that detects air bubbles in an infusion tube, and includes two side walls defining a groove capable of accommodating a portion of the infusion tube in an extending direction. and a tube housing portion having a groove bottom, a transmission portion configured to transmit a signal from one side wall portion to the other side wall portion in a state in which the infusion tube is housed in the groove portion, and the transmission a receiving portion configured to receive the signal transmitted by the portion at the other side wall portion, wherein the groove bottom portion is in contact with the infusion tube when the infusion tube is accommodated in the groove portion. a contact surface, said contact surface being made of a material that is more vibration-isolating than said two side walls.
  • the contact surface is made of a material having a lower elastic modulus than the two side wall portions.
  • the contact surface is preferably made of elastomer.
  • the groove bottom has a protrusion that protrudes into the internal space of the groove, and at least part of the surface of the protrusion exposed to the internal space is the contact surface.
  • a plane is preferred.
  • the two side wall portions and the groove bottom portion are integrally molded by injection molding.
  • the signal is preferably an ultrasonic wave.
  • An infusion pump includes any one of the air bubble detection devices described above.
  • An infusion pump is configured to be able to hold the infusion tube substantially horizontally, and in the air bubble detection device, when the infusion pump is viewed from the front, the transmission section is arranged to sandwich the groove section. It is preferable that the infusion pump is arranged so as to be positioned above the receiving section.
  • an air bubble detection device and an infusion pump that improve the usefulness of technology for detecting air bubbles in an infusion tube attached to an infusion pump.
  • FIG. 1 shows an infusion line including an infusion pump in accordance with one embodiment of the present disclosure
  • FIG. 2 is a perspective view of the infusion pump shown in FIG. 1
  • FIG. 2 is a front view of the infusion pump shown in FIG. 1 with the door portion closed
  • FIG. FIG. 2 is a front view of the infusion pump shown in FIG. 1 with the door section opened
  • 2 is a perspective view of the air bubble detection device of the infusion pump shown in FIG. 1
  • FIG. 6 is a cross-sectional view of the air bubble detection device taken along line I-I' of FIG. 5
  • FIG. 7 is a schematic diagram showing signal transmission in the air bubble detection device shown in FIG. 6
  • 2 is a block diagram of the infusion pump shown in FIG. 1;
  • FIG. 1 is a diagram showing an infusion line 200 formed by connecting an infusion container 201 containing a liquid such as a drug solution to an indwelling needle 202 that is indwelled while being punctured by a patient with a tube 203 serving as an infusion tube.
  • the side of the infusion container 201 of the infusion line 200 may be referred to as the "upstream side of the flow path".
  • the indwelling needle 202 side of the infusion line 200 is referred to as the "downstream side of the flow path”.
  • the direction from the upstream side of the infusion line 200 to the downstream side of the flow path may be referred to as a liquid feeding direction A.
  • the two tubes 203 of the infusion line 200 are a first tube 203 a connecting the infusion container 201 and the drip tube 204 and a second tube 203 b connecting the drip tube 204 and the indwelling needle 202 .
  • a drip tube 204 of an infusion line 200 is attached with a drip probe as a drip number abnormality detection device 205 .
  • the second tube 203b of the infusion line 200 is attached with an infusion pump 300 as a liquid transfer pump.
  • the infusion pump 300 includes an air bubble detection device 100 for detecting air bubbles contained in the liquid flowing through the second tube 203b attached to the infusion pump 300 .
  • the infusion pump 300 is fixed to the stand 250 . Furthermore, a clamp 206 is attached to the second tube 203b of the infusion line 200 shown in FIG. In the following description, the first tube 203a and the second tube 203b are simply referred to collectively as the tube 203 when not particularly distinguished.
  • FIG. 2 is a perspective view of infusion pump 300 .
  • FIG. 3 is a front view of the infusion pump 300 with the door portion 302 closed with respect to the body portion 301 .
  • FIG. 4 is a front view of the infusion pump 300 with the door portion 302 opened with respect to the main body portion 301 . 2 to 4, the second tube 203b of FIG. 1 held by the infusion pump 300 is indicated by a chain double-dashed line for convenience of explanation.
  • the infusion pump 300 shown in FIGS. 2 to 4 is used, for example, in an intensive care unit (ICU, CCU, NICU), etc., and is used for patients, for example, anticancer agents, anesthetic agents, chemotherapy agents, blood transfusions, nutritional supplements, etc.
  • Injection of liquids such as agents is performed within the range of 1 to 1200 mL/h (injection amount per hour, that is, injection rate) and 1 to 9999 mL (planned injection amount) with an accuracy of within ⁇ 10% (preferably ⁇ 3 It is a liquid feed pump that is used for a relatively long time with accuracy within %).
  • the infusion pump 300 includes a body portion 301 and a door portion 302 that can be opened and closed with respect to the body portion 301 .
  • a body cover 303 which is an exterior cover of the body section 301, and the door section 302 described above are molded from a molding resin material having chemical resistance.
  • the display unit 304 is an image display device such as a color liquid crystal display device.
  • the display unit 304 is located on the left side of the front upper portion of the main body cover 303 and arranged above the door portion 302 .
  • the display unit 304 displays the planned injection amount (mL) of administration, the integrated amount of administration (mL), the charging history, the injection rate (mL/h), and the like. In addition, a warning message may be displayed on the display unit 304 .
  • the operation panel section 305 is arranged on the right side of the front upper portion of the main body cover 303 .
  • a power switch button 305A, a fast-forward switch button 305B, a start switch button 305C, a stop switch button 305D, and a menu selection button 305E are arranged on the operation panel section 305 as operation buttons.
  • a door portion 302 is attached to the front lower portion of the main body cover 303 so as to be rotatable about a rotation shaft.
  • the door portion 302 is a plate-like lid that extends long in the left-right direction when the infusion pump 300 is viewed from the front in FIGS. 2 and FIG. 3), between the body portion 301 and the door portion 302, a second tube 203b made of a flexible thermoplastic resin such as soft vinyl chloride can be sandwiched and held. Therefore, the infusion pump 300 is configured to be able to hold the second tube 203b substantially horizontally along the left-right direction when viewed from the front (see FIGS. 3 and 4).
  • substantially horizontal is preferably horizontal, but may include tilting within a predetermined angle range with respect to the horizontal direction (the direction perpendicular to the direction in which gravity acts).
  • the range of the predetermined angle is, for example, a range from -10 degrees to 10 degrees, but is not limited to this.
  • the second tube 203b is attached to the tube attachment portion 306 of the main body portion 301, which is exposed to the outside when the door portion 302 of the infusion pump 300 is opened.
  • the tube attachment section 306 is provided along the left-right direction below the display section 304 and the operation panel section 305 when the infusion pump 300 is viewed from the front.
  • the tube mounting portion 306 is covered by the door portion 302 when the door portion 302 is closed with respect to the main body portion 301, as shown in FIGS.
  • the tube mounting portion 306 defines a guide groove 306a to which the second tube 203b is mounted.
  • the guide grooves 306a are provided continuously in the tube mounting portion 306 so as to extend in the left-right direction when the infusion pump 300 is viewed from the front, but they may be provided intermittently.
  • the second tube 203b is attached to the tube attachment portion 306 along the guide groove 306a.
  • the tube mounting section 306 includes the air bubble detection device 100 , an upstream blockage detection device 308 , a downstream blockage detection device 309 , a first tube guide section 310 , a second tube guide section 311 , and a liquid feed driving section 312 . , and a tube clamp portion 322 .
  • the tube mounting portion 306 includes a first tube guide portion 310, an air bubble detection device 100, an upstream clogging detection device 308, and a liquid transfer driving portion 312 from the upstream side in the liquid transfer direction A.
  • the downstream occlusion detection device 309 , the tube clamp portion 322 and the second tube guide portion 311 are arranged in this order.
  • a tube pressing member 313 and engaging members 314 and 315 are provided inside the door portion 302 .
  • the tube pressing member 313 is arranged as a long rectangular and planar projecting portion along the horizontal direction of the infusion pump 300 when viewed from the front (see FIG. 4 and the like). be.
  • the engaging members 314 and 315 are fitted into fitting portions 317 and 318 formed in the main body portion 301 by operating a lever 316 that interlocks with the engaging members 314 and 315 .
  • the door portion 302 can be closed and the tube mounting portion 306 of the main body portion 301 can be closed.
  • the tube clamp part 322 does not close the second tube 203b attached to the tube attachment part 306 when the door part 302 is closed with respect to the main body part 301 .
  • the tube clamp part 322 clamps the second tube 203b attached to the tube attachment part 306 in a state where the door part 302 is opened with respect to the main body part 301, and closes the hollow part of the second tube 203b. do.
  • the first tube guide part 310 is provided at the right end of the guide groove 306a of the tube mounting part 306 when the infusion pump 300 is viewed from the front, and the second tube guide part 311 is provided at the end of the guide groove 306a of the infusion pump 300. It is provided at the left end portion of the guide groove 306a of the tube mounting portion 306 when the front view of 300 is viewed.
  • the first tube guide part 310 can be held by fitting the flow path upstream side of the second tube 203b of the infusion line 200 (see FIG. It can be held by fitting the downstream side of the flow path of the tube 203b.
  • the infusion pump 300 can hold the second tube 203b substantially horizontally along the guide groove 306a by the first tube guide portion 310 and the second tube guide portion 311 .
  • the second tube 203b mounted substantially horizontally has, from the right in the front view of FIG.
  • the tube clamping portion 322 is arranged so as to face the tube clamping portion 322 in order.
  • FIG. FIG. 5 is a perspective view of the air bubble detection device 100.
  • FIG. FIG. 6 is a cross-sectional view of air bubble detection device 100 taken along line I-I' of FIG.
  • the bubble detection device 100 is a device that detects bubbles (air) contained in the liquid flowing through the infusion tube 203 (second tube 203b in this embodiment).
  • Air bubble detection device 100 is also referred to as an air bubble sensor.
  • the air bubble detection device 100 includes a tube housing section 110, a transmission section 120, and a reception section .
  • the tube accommodating portion 110 defines a groove portion 140 that can accommodate a portion of the second tube 203b in the extending direction. More specifically, as shown in FIGS. 5 and 6, the tube accommodating portion 110 of the air bubble detection device 100 includes a first side wall portion 111a, a second side wall portion 111b, and a groove bottom portion 112 that define the groove portion 140. including.
  • the groove portion 140 forms part of the guide groove 306a when the air bubble detection device 100 is attached to the tube mounting portion 306, as shown in FIG.
  • the groove portion 140 of the air bubble detection device 100 is configured to be able to completely accommodate the second tube 203b in the diameter direction of the second tube 203b.
  • the groove portion 140 may be configured so that at least part of the second tube 203b is exposed to the outside of the groove portion 140 in the diameter direction of the second tube 203b.
  • the tube housing section 110 may further include an attachment section 113 for attachment to the body section 301 of the infusion pump 300 with screws or the like.
  • the tube accommodating portion 110 may be formed integrally with the body cover 303 of the body portion 301 of the infusion pump 300 .
  • the air bubble detection device 100 is arranged in the tube mounting portion 306 so that the groove 140 defined by the tube housing portion 110 is exposed from the tube mounting portion 306 when the infusion pump 300 is viewed from the front. ing. Accordingly, in this embodiment, the first side wall portion 111a, the second side wall portion 111b, and the groove bottom portion 112 of the air bubble detection device 100 are partially exposed from the tube mounting portion 306, respectively.
  • a protrusion 150 is provided at a position corresponding to the air bubble detection device 100 on the inner surface side of the door portion 302 . The protrusion 150 allows a part of the second tube 203b attached to the infusion pump 300 to remain in the internal space of the groove 140 of the air bubble detection device 100 when the door 302 is closed.
  • the transmission unit 120 includes a transmitter capable of transmitting signals.
  • the transmitter is, for example, an ultrasonic transmitting element. That is, in this embodiment, the signal transmitted from the transmitter 120 is an ultrasonic wave. Accordingly, in the air bubble detection device 100, it is possible to detect air bubbles contained in the liquid flowing through the second tube 203b with a relatively simple structure.
  • the signal transmitted from the transmission unit 120 is not limited to ultrasonic waves, and may be any elastic waves that propagate through a medium such as gas, liquid, or solid, such as sound waves other than ultrasonic waves.
  • the transmitter 120 is arranged such that one of the two side walls (in this embodiment, the first side wall 111a and the second side wall 111b) that divides the groove 140 is A signal is transmitted from one side wall portion (first side wall portion 111a in this embodiment) to the other side wall portion (second side wall portion 111b in this embodiment).
  • the transmitting section 120 is arranged on the first side wall section 111 a of the tube accommodating section 110 . More specifically, the transmitter 120 is embedded inside the first side wall portion 111a.
  • the transmitter 120 may be installed so as to be at least partially exposed to the inner space of the groove 140 from the first side wall 111a.
  • the transmitting section 120 may be arranged at a position other than the first side wall section 111a of the tube accommodating section 110 .
  • the receiving unit 130 includes a receiver capable of receiving signals.
  • the receiver is, for example, an ultrasonic receiving element.
  • the receiving section 130 is not limited to the ultrasonic receiving element, and may include any receiver that can receive the signal transmitted by the transmitting section 120 .
  • the receiving section 130 is configured to receive the signal transmitted by the transmitting section 120 at the other side wall portion of the groove portion 140 (the second side wall portion 111b in this embodiment).
  • the receiver 130 generates bubble detection information based on the received signal.
  • the bubble detection information may be the signal received by the receiving unit 130 itself, or information obtained by extracting characteristics such as the strength, frequency, or waveform of the signal received by the receiving unit 130 and digitizing the information. good too.
  • the air bubble detection device 100 is communicably connected to an acquisition unit 351, which will be described later, by wired communication or wireless communication. Thereby, the air bubble detection device 100 can transmit the air bubble detection information to the acquisition unit 351 .
  • the receiving section 130 is arranged on the second side wall section 111b of the tube accommodating section 110. As shown in FIG. More specifically, the receiving section 130 is embedded inside the second side wall section 111b. As a result, even when liquid adheres to the outer surface of the second tube 203b, the liquid is less likely to adhere to the receiving section . However, the receiver 130 may be installed so as to be at least partially exposed to the inner space of the groove 140 from the second side wall 111b.
  • the air bubble detection device 100 transmits a signal (ultrasonic waves in this embodiment) from the transmitter 120 toward the second tube 203b housed in the groove 140.
  • a signal is applied to the liquid flowing into the second tube 203b from the outside of the second tube 203b, for example made of soft vinyl chloride.
  • the transmittance of the liquid of the signal and the transmittance of the bubble of the signal are different, even if the same signal is transmitted from the transmission unit 120, the liquid flowing through the second tube 203b does not contain air bubbles.
  • a difference occurs in the signal received by the receiving unit 130 depending on whether or not it is included.
  • bubbles contained in the liquid flowing through the second tube 203b can be detected.
  • the air bubble detection device 100 is attached to the tube mounting portion 306 of the infusion pump 300 so that the transmission portion 120 is positioned above the reception portion 130 across the groove portion 140 when the infusion pump 300 is viewed from the front. are placed. As a result, the signal transmitted from the transmitter 120 is likely to hit the air bubbles that accumulate on the upper side of the second tube 203b.
  • the air bubble detection device 100 may be arranged in the infusion pump 300 so that the transmission section 120 is positioned below the reception section 130 with the groove section 140 interposed therebetween when the infusion pump 300 is viewed from the front.
  • the tube accommodating portion 110 of the air bubble detection device 100 may be made of any material.
  • the contact surface S provided in the groove bottom portion 112 of the tube accommodating portion 110 is made of a material with higher vibration resistance than the first side wall portion 111a and the second side wall portion 111b.
  • the groove bottom 112 has a contact surface S that can contact the second tube 203b when the second tube 203b is housed in the groove 140.
  • the contact surface S is at least part (all in this embodiment) of the surface of the groove bottom 112 exposed toward the internal space of the groove 140 .
  • FIG. 7 is a schematic diagram showing signal transmission in the air bubble detection device 100 in a cross-sectional view of the air bubble detection device 100 shown in FIG.
  • the second tube 203b is attached to the infusion pump 300 with the liquid adhering to the outer surface of the second tube 203b. Therefore, the liquid L has entered between the second tube 203b and the groove bottom 112 . Even in such a case, the second tube 203b is accommodated in the groove 140 so that the outer surface of the second tube 203b contacts the contact surface S, so that the liquid L adhering to the outer surface of the second tube 203b is removed. , the groove portion 140 can be divided into the transmitting portion 120 side and the receiving portion 130 side by the contact surface S formed of a material with high vibration resistance. Therefore, as indicated by the dashed arrow in FIG.
  • the signal transmitted from the transmitter 120 is less likely to propagate to the receiver 130 through the medium of the liquid L adhering to the outer surface of the second tube 203b. Therefore, the air bubble detection device 100 is less likely to erroneously detect air bubbles in the infusion tube when there are no air bubbles in the infusion tube.
  • the material X has higher vibration isolation than the material Y means that the material X is less likely than the material Y to propagate a signal (elastic wave).
  • vibration isolation can be evaluated by the vibration transmissibility.
  • the vibration transmissibility is the vibration level transmitted to surrounding objects with respect to the vibration level of the vibration source.
  • the smaller the vibration transmissibility the higher the anti-vibration effect. That is, the contact surface S of the groove bottom portion 112 is made of a material having a lower vibration transmissibility than the material forming the first side wall portion 111a and the second side wall portion 111b.
  • vibration isolation may be evaluated by the elastic modulus of the material.
  • the contact surface S of the groove bottom 112 may be made of a material having a lower elastic modulus than the first side wall 111a and the second side wall 111b.
  • the contact surface S of the groove bottom 112 is made of elastomer.
  • Elastomers include, for example, vulcanized rubber, thermosetting elastomers such as resin-based elastomers, or thermoplastic elastomers.
  • the contact surface S of the groove bottom 112 is made of a polyurethane-based elastomer.
  • the contact surface S of the groove bottom 112 is not limited to the elastomer, and may be made of any material.
  • the first side wall portion 111a and the second side wall portion 111b are made of plastic such as ABS resin, for example. Accordingly, the propagation of the signal transmitted from the transmission section 120 is less likely to be hindered by the first side wall portion 111a and the second side wall portion 111b.
  • the first side wall portion 111a and the second side wall portion 111b are not limited to plastic, and can be made of any material having lower vibration resistance than the contact surface S of the groove bottom portion 112 according to the type of signal transmitted from the transmission portion 120. It may be made of any material.
  • the groove bottom 112 may have a protrusion 112a that protrudes into the internal space of the groove 140.
  • the protrusion 112a is provided over the entire groove bottom 112 along the longitudinal direction of the groove 140 (extending direction of the infusion tube accommodated in the groove 140).
  • at least part of the surface of the projection 112a exposed to the internal space of the groove 140 may serve as the contact surface S. This makes it easier for the outer surface of the second tube 203b to come into contact with the contact surface S when the second tube 203b is accommodated in the groove portion 140 . Further, as shown in FIG.
  • the liquid L adhering to the outer surface of the second tube 203b escapes to the groove bottom 112 other than the protrusion 112a. easier. Therefore, as indicated by the dashed arrow in FIG. 7, the signal transmitted from the transmitter 120 is less likely to propagate to the receiver 130 via the liquid L adhering to the outer surface of the second tube 203b.
  • the groove bottom 112 does not have to have the protrusion 112 a that protrudes into the internal space of the groove 140 .
  • the infusion tube 203 is accommodated in the groove 140 so that the outer surface of the second tube 203b contacts the contact surface S, so that the liquid L adhering to the outer surface of the infusion tube 203 flows into the groove 140. , it can be divided into the transmitting unit 120 side and the receiving unit 130 side.
  • the entire groove bottom 112 including the projection 112a is made of the same material. That is, the entire groove bottom portion 112 is made of the material that forms the contact surface S provided on the groove bottom portion 112 .
  • a part of the groove bottom 112 may be made of a material different from the material forming the contact surface S.
  • a portion of the groove bottom 112 including the protrusion 112a may be made of a first material that forms the contact surface S, and the other portion of the groove bottom 112 may be made of a second material different from the first material. .
  • the tube accommodating portion 110 of the air bubble detection device 100 is preferably integrally molded by injection molding. More specifically, it is preferable that the two side wall portions 111 (the first side wall portion 111a and the second side wall portion 111b) and the groove bottom portion 112 included in the tube accommodating portion 110 are integrally molded by injection molding. . This improves the waterproofness, strength, manufacturability, and dimensional stability of the air bubble detection device 100 . In particular, when liquid enters the groove portion 140 , the liquid is less likely to enter the inside of the tube accommodating portion 110 through the groove portion 140 . However, the tube accommodating portion 110 of the air bubble detection device 100 may be manufactured by a method other than injection molding.
  • the upstream blockage detection device 308 and the downstream blockage detection device 309 are devices that detect whether or not the inside of the second tube 203b is blocked.
  • the upstream occlusion detection device 308 is arranged upstream of the liquid feeding drive section 312 in the guide groove 306 a of the tube mounting section 306 .
  • the downstream occlusion detection device 309 is arranged downstream of the liquid feed driver 312 in the guide groove 306 a of the tube mounting portion 306 .
  • Upstream occlusion detector 308 and downstream occlusion detector 309 are also referred to as an upstream occlusion sensor and a downstream occlusion sensor, respectively.
  • the upstream blockage detection device 308 and the downstream blockage detection device 309 have the same configuration.
  • the upstream blockage detection device 308 and the downstream blockage detection device 309 may be displacement sensors that detect radial deformation of the second tube 203b, for example.
  • the upstream blockage detection device 308 and the downstream blockage detection device 309 have, for example, a Hall element and a plunger movable with respect to the Hall element and having a magnet.
  • One end of the plunger is provided with a detection surface exposed in a groove forming part of the guide groove 306a.
  • each of the upstream blockage detection device 308 and the downstream blockage detection device 309 can detect the pressure applied to the detection surface and detect whether the inside of the second tube 203b is blocked.
  • the upstream occlusion detection device 308 and the downstream occlusion detection device 309 may be any device capable of detecting pressure applied to the detection surfaces, such as strain gauges.
  • the infusion pump 300 includes an acquisition unit 351, a notification unit 352, and a control unit 353.
  • FIG. 8 is a block diagram of the infusion pump 300. As shown in FIG. For convenience of explanation, FIG. 8 also illustrates the configuration of a liquid transfer drive unit 312 capable of transferring the liquid in the second tube 203b.
  • the liquid feeding drive unit 312 has a drive motor 312a, a cam structure 312b having a plurality of cams rotationally driven by the drive motor 312a, and a plurality of fingers moved by each cam of the cam structure 312b. and a finger structure 312c. Further, the finger structure 312c of the liquid feeding drive section 312 is arranged in the tube mounting section 306 (see FIG. 4).
  • Cam structure 312b has a plurality of cams, eg, six cams 319a-319f, and finger structure 312c has six fingers 320a-320f corresponding to the six cams 319a-319f. are doing.
  • the six cams 319a-319f are arranged with a phase difference, and the cam structure 312b is connected to the output shaft 321 of the drive motor 312a.
  • the liquid-sending drive unit 312 sequentially drives the fingers from the upstream side to the downstream side of the second tube 203b in the extending direction of the second tube 203b.
  • the second tube 203b is sequentially compressed and closed from the upstream side to the downstream side of the second tube 203b and performs peristaltic motion. Therefore, the liquid transfer driving section 312 can transfer the liquid in the second tube 203b from the upstream side to the downstream side of the second tube 203b.
  • the acquisition unit 351 includes one or more communication interfaces.
  • the acquisition unit 351 is configured to be able to acquire various types of information from other constituent elements of the infusion pump 300 through wired communication or wireless communication.
  • the acquisition unit 351 may be configured to be capable of transmitting information in addition to receiving the various types of information described above.
  • the acquisition unit 351 may be capable of transmitting various received information to an external device such as a server.
  • the acquisition unit 351 can acquire air bubble detection information from the air bubble detection device 100 .
  • the bubble detection information is, for example, the signal itself received by the receiver 130 of the bubble detection device 100 .
  • the bubble detection information may be information obtained by extracting characteristics such as the intensity, frequency, or waveform of the signal received by the receiver 130 of the bubble detection device 100 and digitizing the information.
  • the acquisition unit 351 can acquire pressure information detected by the upstream blockage detection device 308 or the downstream blockage detection device 309 from the upstream blockage detection device 308 or the downstream blockage detection device 309 .
  • the acquisition unit 351 can acquire operation mode information of the infusion pump 300 .
  • the operation panel unit 305 (see FIG. 3, etc.) of the infusion pump 300 has a plurality of operation buttons, and the acquisition unit 351 acquires the operation mode information according to the information input from the operation panel unit 305. do. More specifically, when the operator presses the fast-forward switch button 305B or the start switch button 305C, the acquisition unit 351 selects a liquid feeding mode in which the liquid feeding drive unit 312 is driven to feed liquid as the operation mode information. Acquire the liquid transfer mode information to be executed.
  • the acquiring unit 351 obtains the operation mode information to perform liquid feeding without driving the liquid feeding drive unit 312. Acquire the liquid transfer stop mode information for executing the liquid transfer stop mode.
  • the acquisition unit 351 can acquire open/closed state information of the door unit 302 with respect to the main unit 301 of the infusion pump 300 .
  • the obtaining portion 351 Closed state information indicating that the door portion 302 is closed with respect to the main body portion 301 is acquired as the open/closed state information.
  • the obtaining portion 351 is in a state where the engaging members 314 and 315 (see FIG. 4) of the door portion 302 are not fitted into the fitting portions 317 and 318 (see FIG. 4) formed in the body portion 301, respectively.
  • open state information indicating that the door portion 302 is opened with respect to the main body portion 301 is acquired as open/closed state information.
  • the acquisition unit 351 can acquire information based on the operator's operation of the infusion pump 300 itself, and can acquire information transmitted from components such as the air bubble detection device 100 .
  • the acquisition unit 351 in this embodiment obtains the air bubble detection information from the air bubble detection device 100 described above, the pressure information from the upstream blockage detection device 308 and the downstream blockage detection device 309, the operation mode information of the infusion pump 300, the door
  • information on the open/closed state of the unit 302 it may be configured to acquire only a part of the various information described above, or to acquire other information in addition to the various information described above.
  • the notification unit 352 includes one or more output devices.
  • An output device included in the notification unit 352 is, for example, a display, a speaker, or a vibrator.
  • the notification unit 352 outputs an image, sound, vibration, or the like.
  • the notification unit 352 notifies the information acquired by the acquisition unit 351 to the outside as perceptual identification information identifiable by humans, based on a control command from the control unit 353, which will be described later.
  • perceptual identification information is an alarm by sound as auditory identification information, color change of light such as LED as visual identification information, lighting, extinguishing, blinking display, etc. Can be perceived by the five human senses. contains arbitrary information.
  • the control unit 353 issues operation timing or operation instructions to each unit of the infusion pump 300 .
  • the control unit 353 is configured by a processor such as a CPU or MPU. More specifically, the control unit 353 of this embodiment includes ROM (read only memory), RAM (random access memory), nonvolatile memory, and a clock.
  • the clock can correct the current time by a predetermined operation, and can acquire the current time, measure the elapsed time of a predetermined liquid transfer operation, measure the reference time for liquid transfer speed control, and the like.
  • control unit 353 is connected to the power switch button 305A and the switch.
  • the switch supplies power to the control unit 353 from either the power converter unit or the rechargeable battery by switching between the power converter unit and the rechargeable battery such as a lithium ion battery.
  • the power converter section is connected to a commercial AC power supply via an outlet.
  • control unit 353 instructs the display unit driver to drive the display unit 304, and displays the scheduled injection amount (mL) of the administration described above, or various warning messages, etc. on the display unit 304.
  • control unit 353 controls the notification unit 352 based on various information acquired by the acquisition unit 351 .
  • the control unit 353 determines that an air bubble is detected based on the air bubble detection information from the air bubble detection device 100 acquired by the acquisition unit 351
  • the control unit 353 controls the notification unit 352 to notify the sensory identification information.
  • the control unit 353 may cause the display unit 304 as the notification unit 352 to display a warning message.
  • the control unit 353 may cause the speaker as the notification unit 352 to output a warning sound.
  • control unit 353 controls, for example, the liquid feeding drive unit 312 based on various information acquired by the acquisition unit 351 .
  • the control unit 353 determines that an air bubble is detected based on the air bubble detection information from the air bubble detection device 100 acquired by the acquisition unit 351
  • the control unit 353 stops driving the liquid feeding driving unit 312, may be terminated. This makes it possible to prevent air bubbles from being sent into the body by the infusion pump 300, improve the safety of the infusion pump 300, and detect air bubbles in the infusion tube 203 attached to the infusion pump 300. improve the usability of
  • the air bubble detection device 100 is an air bubble detection device 100 that detects air bubbles in the infusion tube 203 (second tube 203b in this embodiment).
  • Two side wall portions 111 first and second side wall portions 111a and 111b in this embodiment
  • a groove bottom portion 112 that divide a groove portion 140 that can partially accommodate a tube accommodating portion 110 in the direction, and the groove portion 140
  • a signal is transmitted from one side wall portion (first side wall portion 111a in this embodiment) to the other side wall portion (second side wall portion 111b in this embodiment).
  • 112 has a contact surface S that can come into contact with the infusion tube 203 when the infusion tube 203 is housed in the groove 140 , and the contact surface S is made of a material with higher vibration resistance than the two side walls 111 . ing.
  • the infusion tube 203 is positioned in the groove 140 so that the outer surface of the infusion tube 203 is in contact with the contact surface S even in a state where liquid adheres to the outer surface of the infusion tube 203 .
  • the liquid L adhering to the outer surface of the infusion tube 203 is transferred to the transmitting section 120 side and the receiving section 130 side by the contact surface S formed of a material with high vibration resistance in the groove portion 140. can be divided into Therefore, the signal transmitted from the transmission unit 120 is less likely to propagate to the reception unit 130 through the medium of the liquid L adhering to the outer surface of the infusion tube 203 .
  • the air bubble detection device 100 is less likely to erroneously detect air bubbles in the infusion tube 203 if there are no air bubbles in the infusion tube 203 . Therefore, according to the air bubble detection device 100 according to this embodiment, it is possible to improve the usefulness of the technology for detecting air bubbles in the infusion tube 203 attached to the infusion pump 300 .
  • the infusion pump 300 is configured to hold the infusion tube 203 substantially horizontally.
  • the direction in which the infusion tube 203 is held by the infusion pump 300 is not limited to the horizontal direction.
  • the infusion pump 300 may be configured to hold the infusion tube 203 substantially vertically.
  • the air bubble detection device 100 in the infusion pump 300, the air bubble detection device 100, the acquisition unit 351, the notification unit 352, and the control unit 353 are arranged separately.
  • the air bubble detection device 100 may be configured to include the acquisition unit 351 , the notification unit 352 and the control unit 353 . In such a case, the air bubble detection device 100 can perform a series of processes from detecting air bubbles in the infusion tube to issuing a warning.
  • the present disclosure relates to an air bubble detection device and an infusion pump.
  • Air bubble detection device (air bubble sensor) 110: Tube housing part 111: Side wall part 111a: First side wall part 111b: Second side wall part 112: Groove bottom part 112a: Protruding part 113: Mounting part 120: Transmitting part 130: Receiving part 140: Groove part 150: Protrusion 200: Infusion Line 201: infusion container 202: indwelling needle 203: tube (infusion tube) 203a: First tube 203b: Second tube 204: Infusion tube 205: Drop number abnormality detection device 206: Clamp 250: Stand 300: Infusion pump 301: Main unit 302: Door unit 303: Main unit cover 304: Display unit 305: Operation Panel portion 305A: Power switch button 305B: Fast forward switch button 305C: Start switch button 305D: Stop switch button 305E: Menu selection button 306: Tube mounting portion 306a: Guide groove 308: Upstream blockage detector (upstream blockage sensor) 309: Downstream blockage detection device (downstream block

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  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
PCT/JP2023/002457 2022-02-02 2023-01-26 気泡検出装置及び輸液ポンプ WO2023149342A1 (ja)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0333366U (enrdf_load_stackoverflow) * 1989-08-09 1991-04-02
JPH03107758A (ja) * 1989-09-21 1991-05-08 Terumo Corp 気泡検出センサ
JPH07178168A (ja) * 1993-12-21 1995-07-18 Terumo Corp 気泡検出装置
JPH08105867A (ja) * 1994-10-05 1996-04-23 Terumo Corp 超音波気泡検出器
JP2004209103A (ja) * 2003-01-07 2004-07-29 Terumo Corp 腹膜透析装置
JP2012196411A (ja) * 2011-03-23 2012-10-18 Terumo Corp 輸液ポンプ

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0333366U (enrdf_load_stackoverflow) * 1989-08-09 1991-04-02
JPH03107758A (ja) * 1989-09-21 1991-05-08 Terumo Corp 気泡検出センサ
JPH07178168A (ja) * 1993-12-21 1995-07-18 Terumo Corp 気泡検出装置
JPH08105867A (ja) * 1994-10-05 1996-04-23 Terumo Corp 超音波気泡検出器
JP2004209103A (ja) * 2003-01-07 2004-07-29 Terumo Corp 腹膜透析装置
JP2012196411A (ja) * 2011-03-23 2012-10-18 Terumo Corp 輸液ポンプ

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