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WO2025182687A1 - Dispositif médical d'aspiration - Google Patents

Dispositif médical d'aspiration

Info

Publication number
WO2025182687A1
WO2025182687A1 PCT/JP2025/005475 JP2025005475W WO2025182687A1 WO 2025182687 A1 WO2025182687 A1 WO 2025182687A1 JP 2025005475 W JP2025005475 W JP 2025005475W WO 2025182687 A1 WO2025182687 A1 WO 2025182687A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
barrel
rear space
suction device
support member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2025/005475
Other languages
English (en)
Japanese (ja)
Inventor
隆史 伊藤
徹也 福岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Terumo Corp
Original Assignee
Terumo Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Terumo Corp filed Critical Terumo Corp
Publication of WO2025182687A1 publication Critical patent/WO2025182687A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems

Definitions

  • the present invention relates to a medical suction device for suctioning biological materials from a living body.
  • Patent Document 1 Utility Model Registration No. 31424666 discloses a thrombus aspiration catheter device for aspirating thrombi that have accumulated in limbs such as the legs and arms by inserting a thin tube called a catheter, reaching the treatment site, and aspirating the thrombus itself.
  • the thrombus aspiration catheter device of Patent Document 1 includes a thrombus aspiration catheter (1) that includes a tubular body with an aspiration lumen (8) that runs from the base end to the tip, an aspiration syringe (6) that generates negative pressure, and a catheter connecting member with an internal lumen that connects the internal spaces of the thrombus aspiration catheter (1) and the aspiration syringe (6).
  • a suction tool such as a suction syringe is used as a suction pump that generates negative pressure for aspirating the biological material.
  • a suction tool such as a suction syringe
  • negative pressure can remain within the device for a long period of time even after the desired biological material has been aspirated, which could result in unintended aspirating of biological material.
  • the object of the present invention is to provide a medical suction device for aspirating biological material from a living body, which is capable of appropriately adjusting the negative pressure generated within the device.
  • FIG. 1 is a front view showing an embodiment of a medical suction device according to the present invention.
  • 2 is a front view showing the suction pump of the medical suction device shown in FIG. 1.
  • FIG. 3 is a cross-sectional view taken along line AA in FIG.
  • FIG. 4 is a cross-sectional view for explaining the operation of the suction pump shown in FIG.
  • FIG. 5 is a cross-sectional view for explaining the operation of the suction pump shown in FIG.
  • FIG. 6 is a cross-sectional view showing a modification of the suction pump shown in FIG.
  • FIG. 7 is a cross-sectional view for explaining another embodiment of the suction pump of the medical suction device of the present invention.
  • FIG. 8 is a cross-sectional view taken along the line BB in FIG. FIG.
  • FIG. 9 is a cross-sectional view for explaining another embodiment of the suction pump of the medical suction device of the present invention.
  • FIG. 10 is a cross-sectional view taken along the line CC in FIG.
  • FIG. 11 is a cross-sectional view for explaining another embodiment of the suction pump of the medical suction device of the present invention.
  • FIG. 12 is a cross-sectional view for explaining another embodiment of the suction pump of the medical suction device of the present invention.
  • FIG. 13 is a front view showing another embodiment of the medical suction device of the present invention.
  • FIG. 14 is an explanatory diagram for explaining the operation of the medical suction device shown in FIG.
  • the medical suction device of the present invention is a medical suction device 1 for aspirating biological material from a living organism, and comprises a suction tube 11 that can be inserted into a living organism and has an opening (suction port) 10 at its tip for aspirating biological material, a trap 12 to which the base end of the suction tube 11 is connected and which can contain biological material aspirated from the opening 10, and a suction pump 14 that is connected to the trap 12 (via a connecting tube 13) and generates negative pressure for aspirating the biological material.
  • the suction pump 14 includes a barrel 30 having a cylindrical portion 31, and a piston 50 whose tip end portion is inserted into the barrel 30 and movable within the barrel 30.
  • the piston 50 includes a second air passage 51 that connects the rear space 34 with the outside, and a second valve 52 that allows air to flow out of the rear space 34 to the outside through the second air passage 51 (when the piston 50 moves forward) and suppresses air from flowing in from the outside to the rear space 34 (through the second air passage 51) (when the piston 50 moves backward).
  • the suction pump 14 draws air from the first air passage 35 into the rear space 34 when the piston 50 moves backward, thereby generating negative pressure for sucking biological material.
  • Such a medical suction device 1 is used to suction biological materials (e.g., secretions, blood, blood clots, phlegm, etc.) from a living body (e.g., the oral cavity, nasal cavity, airways, blood vessels, etc.), but is not limited to the examples shown here.
  • biological materials e.g., secretions, blood, blood clots, phlegm, etc.
  • a living body e.g., the oral cavity, nasal cavity, airways, blood vessels, etc.
  • the suction tube 11 comprises a tube main body 15 and a tip portion 16 attached to the tip of the tube main body 15.
  • an opening (suction port) 10 for suctioning biological materials is provided at the tip of the tip portion 16 of the suction tube 11.
  • the opening 10 is open at the tip surface of the suction tube 11 (tip portion 16). Note that the opening does not have to be open only at the tip surface of the suction tube, but may also be open at the tip surface and/or side surface of the tip portion of the suction tube. Furthermore, multiple openings may be provided.
  • a marker made of an X-ray (radiation-opaque) material may be provided on the distal portion of the suction tube that is inserted into the living body (particularly the tip portion or its vicinity). This allows the position of the suction tube within the living body to be confirmed by X-ray imaging.
  • the base end of the suction tube 11 (tube main body portion 15) is connected to the trap 12 (tip-side connection portion 18), which will be described later.
  • the suction tube 11 (tube body 15 and tip 16) is preferably flexible, and examples of materials for its formation include polyolefins (e.g., polyethylene, polypropylene), polyolefin elastomers (e.g., polyethylene elastomers, polypropylene elastomers, ethylene-propylene copolymer elastomers, etc.), polyvinyl chloride, ethylene-vinyl acetate copolymer, polyamide elastomers, polyurethane, thermoplastic resins such as fluororesins, silicone rubber, etc.
  • polyolefins e.g., polyethylene, polypropylene
  • polyolefin elastomers e.g., polyethylene elastomers, polypropylene elastomers, ethylene-propylene copolymer elastomers, etc.
  • polyvinyl chloride ethylene-vinyl acetate copolymer
  • the trap 12 contains biological material sucked in through the opening 10 and includes a container portion 17, a distal connection portion 18, and a proximal connection portion 19.
  • the distal connection portion 18 and the proximal connection portion 19 are each tubular portions that connect the inside and outside of the container portion 17.
  • the distal connection portion 18 and the proximal connection portion 19 are not directly connected (in other words, they are connected via the space within the container portion 17), and biological material introduced into the container portion 17 from the distal connection portion 18 falls due to gravity and is contained in the container portion 17, without flowing into the proximal connection portion 19.
  • a filter 20 is attached to the bottom of the tip-side connecting portion 18. This allows for separation of aspirated biological materials.
  • the trap 12 may also be provided with a venting mechanism (valve mechanism) to relieve positive and/or negative pressure generated within the medical suction device 1 (particularly the portion from the front space 33 of the barrel 30 described below to the tip side (the opening (suction port) 10 side)). This prevents the adverse effects of unintended positive and/or negative pressure generated within the medical suction device 1.
  • a venting mechanism may be provided in a location other than the trap of the medical suction device.
  • the connecting tube 13 connects the trap 12 to the suction pump 14, which will be described later.
  • the distal end of the connecting tube 13 is connected to the proximal connection portion 19 of the trap 12, and the proximal end is connected to the nozzle portion 37 of the suction pump 14.
  • the connecting tube 13 is preferably flexible (soft), and may be made of the same material as such a suction tube; however, since it is not inserted into a living body, it may be made of a different material.
  • the suction pump 14 includes a barrel 30 having a cylindrical portion 31.
  • the barrel 30 includes a distal wall portion 32 extending across the cylindrical portion 31.
  • the distal wall portion 32 is made of a disc-shaped member and is fixed to the distal end of the cylindrical portion 31.
  • the barrel 30 also includes a proximal wall portion 38 fixed to the proximal end of the cylindrical portion 31.
  • a through hole 39 is provided at the center of the proximal wall portion 38.
  • the inner shape (inner diameter) of the through hole 39 is slightly larger than the outer shape (outer diameter) of the rod portion 53 of the piston 50, which will be described later.
  • the distal wall portion and the proximal wall portion may be integrally molded with the cylindrical portion. Additionally, a pair of protrusions 40 that protrude outward are provided at the base end of the barrel 30.
  • the barrel 30 has a tip opening and a nozzle portion 37 that tapers toward the tip opening.
  • the base end of the connecting tube 13 is connected to the tip of the nozzle portion 37.
  • the space 33 in front of the tip side wall portion 32 inside the barrel 30 is connected to the opening (suction port) 10 via the nozzle portion 37, the connecting tube 13, the trap 12, and the suction tube 11.
  • the barrel 30 has a first air passage 35 that penetrates the tip side wall 32 and connects the front space 33 and rear space 34 of the tip side wall 32 inside the barrel 30.
  • the first air passage 35 is composed of eight through holes (see Figure 8) that are evenly spaced around the circumference of the tip side wall 32.
  • the barrel 30 is equipped with a first valve portion 36 that allows air to flow from the front space 33 to the rear space 34 in the first air passage 35 (through the first air passage 35) when the piston 50 moves rearward, and that prevents air from flowing out from the rear space 34 to the front space 33 (through the first air passage 35) when the piston 50 moves forward.
  • the first valve portion 36 is equipped with a first valve member 41 as shown in FIG. 3.
  • the first valve portion 36 has a so-called umbrella valve structure in which the tip side wall portion 32 and the first valve member 41 cooperate.
  • the first valve member 41 is made of an elastic material (e.g., rubber, elastomer) and includes an umbrella portion 42 and a shaft portion 43.
  • the shaft portion 43 of the first valve member 41 is inserted into and fixed in place in a through-hole provided in the center of the tip side wall portion 32.
  • the umbrella portion 42 of the first valve member 41 is formed to cover the first air passage 35 (here, all eight through-holes mentioned above).
  • the suction pump 14 includes a piston 50 whose tip end is inserted into the barrel 30 and is movable within the barrel 30.
  • the piston 50 is provided at the tip end and includes a generally disk-shaped piston main body 54 and a rod-shaped (cylindrical) rod 53 connected to the base end of the piston main body 54.
  • the piston main body 54 includes a first member 55 and a second member 56, and a flange 58 of a second valve member 57 that constitutes the second valve unit 52 (described below) is sandwiched between the first member 55 and the second member 56.
  • the base end portion of the rod 53 extends outward through the through-hole 39 in the base end wall 38 of the barrel 30 described above, and an operating handle 59 is provided at its base end.
  • An O-ring groove 60 is provided around the entire center of the outer peripheral surface of the piston main body 54 (first member 55), and an O-ring 61 is fitted into the O-ring groove 60.
  • the O-ring 61 ensures airtightness between the outer peripheral portion of the piston main body 54 and the inner peripheral portion of the tubular portion 31. This defines a rear space 34 of the tip side wall 32 between the base end surface of the tip side wall 32 and the tip surface of the piston main body 54.
  • the piston 50 has a second air passage 51 that connects the rear space 34 with the outside.
  • the second air passage 51 is provided so as to penetrate the center of the piston 50 (piston body portion 54 and rod portion 53) from the tip to the base end.
  • the second valve member 57 is made of an elastic material (e.g., rubber or elastomer) and has a pair of elastically deformable beak-shaped portions 62, with a slit 63 formed at the abutment (joint) between the beak-shaped portions 62, 62.
  • the second valve member 57 is normally closed.
  • An outwardly protruding flange portion 58 is provided at the tip (lower portion in Figure 3) of the second valve member 57.
  • the second valve member 57 is positioned in the second air passage 51 with the flange portion 58 sandwiched between the first member 55 and second member 56 of the piston main body 54 described above.
  • the inner cavity of the second valve member 57 gradually narrows toward the base end of the piston 50 (upward in Figure 3).
  • the slit 63 opens when each of the pair of beak-shaped portions 62 elastically deforms, and closes when each of the pair of beak-shaped portions 62 elastically restores its original shape.
  • the medical suction device 1 of this embodiment is equipped with a biasing member 70 that biases the piston 50 backward or forward relative to the barrel 30.
  • the biasing member 70 is a compression spring that biases the piston 50 backward relative to the barrel 30.
  • the biasing member 70 of this embodiment is a compression spring that is disposed between the base end sidewall 38 of the barrel 30 and the handle portion 59 of the piston 50, and biases the piston 50 backward relative to the barrel 30, in other words, in a direction that moves the piston 50 (piston main body 54) and the barrel 30 (tip end sidewall 32) away from each other.
  • the handle portion 59 is operated to move the piston 50, which is held rearward (toward the base end) by the biasing member 70, forward (pushing it into the barrel 30).
  • the first valve portion 36 prevents air from flowing out of the first air passage 35 from the rear space 34 to the front space 33, while the second valve portion 52 allows air to flow out of the second air passage 51 from the rear space 34 to the outside.
  • the increase in pressure in the front space 33 and rear space 34 due to the forward movement of the piston 50 is suppressed or prevented.
  • the piston 50 moves rearward due to the biasing force of the biasing member 70, as shown in FIG. 4.
  • the first valve portion 36 allows air to flow from the front space 33 to the rear space in the first air passage 35, while the second valve portion 52 prevents air from flowing from the outside into the rear space 34 in the second air passage 51.
  • the biasing force of the biasing member 70 can be used to move the piston 50 rearward with a preset force, thereby making the generated negative pressure approximately uniform. Additionally, excessive or insufficient force can be prevented from causing the piston 50 to move rearward.
  • the biasing member may be a tension spring that biases the piston 50 forward relative to the barrel 30.
  • the biasing member may bias the piston 50 (piston main body 54) and the barrel 30 (tip side wall 32) in a direction that brings them closer to each other. This allows the piston 50 to move forward with a preset force, preventing the pressure in the rear space 34 from rising excessively beyond the gas flow rate allowed by the second air passage 51 and second valve portion 52, and preventing the second air passage 51 from becoming blocked when the handle portion 59 is operated to push the piston 50 in (move it forward).
  • the suction pump 14 exhausts air from the rear space 34 to the outside through the second air passage 51 when the piston 50 is moved forward. This allows the piston 50 to continuously reciprocate, and the negative pressure level (the magnitude of the negative pressure used to aspirate biological material) can be adjusted by this continuous reciprocating movement of the piston 50. Furthermore, by providing this structure, it is not necessary to secure the volume to be aspirated at one time, as with conventional syringes, and therefore the suction pump 14, and therefore the entire medical suction device 1, can be made smaller.
  • the medical suction device 1 may also be equipped with a pressure sensor to check the negative pressure level.
  • the first valve portion 36 of the medical suction device 1 of this embodiment prevents air from flowing out from the rear space 34 to the front space 33 when the piston 50 moves forward, it does not completely block ventilation between the rear space 34 and the front space 33.
  • the first valve portion 36 allows ventilation in (through) the first ventilation path 35, thereby gradually eliminating such a pressure difference.
  • the second valve section 52 of the medical suction device 1 of this embodiment prevents air from flowing into the rear space 34 from the outside when the piston 50 moves rearward, it does not completely block ventilation between the outside and the rear space 34.
  • the second valve section 52 allows ventilation in (through) the second ventilation path 51, thereby gradually eliminating such a pressure difference.
  • a filter 64 may be provided in the second air passage 51 (including the base-end opening of the second air passage 51 that opens in the handle section 59) to more reliably prevent foreign matter from entering the medical suction device 1 from the outside.
  • first valve section 36 and the second valve section 52 it is preferable to appropriately set the characteristics of the first valve section 36 and the second valve section 52.
  • first valve section 36 it is desirable to appropriately set the specifications (shape, size, material, surface treatment, etc.) of the first valve member 41 and the design (position, size, etc.) of the first air passage 35, and in the second valve section 52, it is desirable to appropriately set the specifications (shape, size, material, surface treatment, etc.) of the second valve member 57.
  • the negative pressure level can be adjusted by the reciprocating motion of the piston 50 as described above, and therefore, by reducing the sealing performance of each valve section, it is possible to compensate for the reduction in negative pressure generated by a single operation (rearward movement of the piston 50).
  • the first valve portion 36a may include a first vent portion 44 that allows ventilation between the rear space 34 and the front space 33 in the first ventilation path 35 (gradually eliminating the pressure difference between the rear space 34 and the front space 33), and the second valve portion 52a may include a second vent portion 65 that allows ventilation between the outside and the rear space 34 in the second ventilation path 51 (gradually eliminating the pressure difference between the outside and the rear space 34).
  • the first valve portion 36a of the suction pump 14a of this embodiment has grooves 45 formed on the base end surface of the tip-side wall portion 32 that communicate with the first air passage 35 (here, each groove 45 communicates with four of the eight through-holes that make up the first air passage 35). These grooves 45 form the first vent portions 44.
  • first vent portions 44 In other words, in the first valve portion 36a of the suction pump 14a, even when the outer peripheral edge of the umbrella portion 42 of the first valve member 41 is substantially in close contact with the base end surface of the tip-side wall portion 32, ventilation is permitted between the rear space 34 and the front space 33 in the first air passage 35 through the first vent portions 44 (each groove 45), and the pressure difference between the rear space 34 and the front space 33 is gradually eliminated.
  • the number of grooves 45 is preferably 40 to 60 percent of the number of through-holes.
  • a vent mechanism may be provided within the medical suction device (e.g., a trap) to relieve positive pressure generated from the front space of the barrel to the tip side (the opening (inlet) side).
  • the second valve section 52a (second valve member 57a) of the suction pump 14a of this embodiment has micro-through holes (micro-passages) 66 (three in this example) that penetrate the joint between the pair of beak-shaped sections 62 (connecting the front and rear) where the slit 63 is formed, and these micro-through holes 66 form the second ventilation section 65. That is, even when the slit 63 is closed, the second valve section 52a of the suction pump 14a allows ventilation between the outside and the rear space 34 in the second ventilation path 51 through the second ventilation section 65 (each micro-through hole 66), and the pressure difference between the outside and the rear space 34 is gradually eliminated.
  • multiple micro-through holes (micro-passages) 66 specifically three, are provided, but a number of two to four is preferable.
  • the second vent portion can have a structure similar to that of suction pump 14b shown in Figures 11 and 12.
  • Suction pump 14b is provided with a second vent portion 65b that opens (communicates) with O-ring groove 60 and communicates with second vent path 51, allowing O-ring 61 to move forward and backward within O-ring groove 60.
  • O-ring 61, O-ring groove 60, and second vent portion 65b form second valve portion 52b.
  • first and second ventilation sections is not limited to the grooves and minute vent holes described above, and various configurations can be used as long as the desired breathability (ability to eliminate pressure differences) is ensured.
  • first and second ventilation sections may also be configured by deliberately changing the specifications (shape, size, material, surface treatment, etc.) of the first and second valve members relative to the specifications conventionally used so as to reduce sealing performance (ensuring breathability).
  • first and second valve sections are not limited to those described above (umbrella valves and duckbill valves), and any known valve structure may be used as appropriate.
  • FIG. 13 and 14 show another embodiment of the medical suction device of the present invention.
  • the medical suction device described below has the same basic configuration as the above-described medical suction device 1, but differs in that it includes a first support member 71 and a second support member 72. Unless otherwise specified, components that are substantially similar to those of the above-described medical suction device 1 will be designated by the same or corresponding names and symbols, and detailed explanations will be omitted.
  • the medical suction device 1c of this embodiment is equipped with a biasing member 70 that biases the piston 50 backward or forward relative to the barrel 30, and further includes a first support member 71 connected to the barrel 30 and a second support member 72 connected to the piston 50.
  • the medical suction device 1c is able to generate negative pressure by operating the first support member 71 and/or the second support member 72 and by using the biasing force of the biasing member 70 to reciprocate the piston 50.
  • “connected” here does not necessarily mean that they cannot move relative to each other, but rather that they can be linked by operating each support member.
  • negative pressure can be generated by placing one of the first support member 71 or the second support member 72 on the support surface 73 and stepping on the other of the first support member 71 or the second support member 72 with a foot, thereby operating the first support member 71 and/or the second support member 72 and using the biasing force of the biasing member 70 to reciprocate the piston 50.
  • the medical suction device 1c of this embodiment comprises a first support member 71 and a second support member 72 connected to each other via a hinge portion 74 so as to be rotatable relative to each other.
  • a barrel 30 is connected to the first support member 71. More specifically, the cylindrical portion 31 of the barrel 30 enters a groove 75 provided at the end of the first support member 71 opposite the side where the hinge portion 74 is provided, and the peripheral edge of the groove 75 and the protruding portion 40 of the barrel 30 are slidably connected.
  • a piston 50 is connected to the second support member 72. More specifically, the handle portion 59 of the piston 50 is connected to the end of the second support member 72 opposite the side where the hinge portion 74 is provided.
  • the second support member 72 is placed on the placement surface 73, and the first support member 71 is provided with an operating plate portion 76 that can be stepped on between the hinge portion 74 and the portion to which the barrel 30 is connected as described above.
  • the biasing member 70 biases the piston 50 rearward relative to the barrel 30. In the normal state (when no force is applied), as shown in Figure 13, the biasing force of the biasing member 70 causes the first support member 71 and the second support member 72 to be in an open state [the piston 50 (piston main body portion 54) and the barrel 30 (tip side wall portion 32] are spaced apart from each other].
  • the first support member 71 and the second support member 72 can be closed (the piston 50 (piston main body portion 54) and the barrel 30 (tip side wall portion 32) are close to each other) as shown in FIG. 14, and negative pressure can be generated by using this operation and the biasing force of the biasing member 70 to reciprocate the piston 50.
  • Such a medical suction device 1 not only improves the operability of the medical suction device 1, but also leaves both hands free for the operator to perform other tasks (such as operating the suction tube 11 or checking the pressure sensor) while suctioning biological materials, allowing for more efficient suction of biological materials. Furthermore, as described above, the negative pressure level can be adjusted by the continuous reciprocating motion of the piston 50 in the medical suction device 1 of this embodiment, and so being able to operate it with the feet in this way offers significant advantages.
  • the medical suction device of the present invention is a suction pump in which the barrel comprises a first air passage connecting a front space and a rear space in the tip side wall portion of the barrel, and a first valve portion that allows air to flow from the front space to the rear space in the first air passage when the piston moves rearward and prevents air from flowing out from the rear space to the front space when the piston moves forward, and the piston comprises a second air passage connecting the rear space to the outside, and a second valve portion that allows air to flow from the rear space to the outside in the second air passage when the piston moves forward and prevents air from flowing in from the outside to the rear space when the piston moves rearward, and in such a suction pump, air is sucked into the rear space from the first air passage when the piston moves rearward, thereby generating negative pressure for suctioning biological material. This allows the negative pressure generated in the medical suction device to be appropriately adjusted in order to suction biological material.
  • the medical suction device of the present invention is embodied as follows.
  • a medical suction device for aspirating biological material from a living organism comprising: a suction tube that can be inserted into the living organism and has an opening at its tip for aspirating the biological material; a trap to which the base end of the suction tube is connected and which can contain the biological material aspirated from the opening; and a suction pump that is connected to the trap and generates negative pressure for aspirating the biological material.
  • the suction pump comprises a barrel having a tubular portion, and a piston whose tip end portion is inserted into the barrel and movable within the barrel.
  • the barrel has a tip side wall portion that is provided across the tubular portion, a first air passage that penetrates the tip side wall portion and communicates a front space and a rear space of the tip side wall portion within the barrel, and a front air passage that penetrates the tip side wall portion and communicates a front space and a rear space of the front side wall portion within the barrel.
  • a first valve portion that allows air to flow in from the front space to the rear space in the first air passage when the piston moves rearward and that prevents air from flowing out from the rear space to the front space when the piston moves forward
  • the piston comprises a second air passage that connects the rear space to the outside, and a second valve portion that allows air to flow out from the rear space in the second air passage to the outside when the piston moves forward and that prevents air from flowing in from the outside to the rear space when the piston moves rearward
  • the suction pump is capable of generating the negative pressure for suctioning the biological material by sucking air from the first air passage into the rear space when the piston moves rearward.
  • the above-mentioned medical suction device may be implemented as follows.
  • the suction pump expels air from the rear space to the outside through the second air passage when the piston is moved forward, and it is preferable that the negative pressure level can be adjusted by the continuous reciprocating motion of the piston.
  • the first valve portion includes a first ventilation portion that allows ventilation between the rear space and the front space in the first ventilation path
  • the second valve portion includes a second ventilation portion that allows ventilation between the outside and the rear space in the second ventilation path.
  • the medical suction device preferably includes a biasing member that biases the piston backward or forward relative to the barrel.
  • the biasing member biases the piston rearward relative to the barrel.
  • the medical suction device preferably includes a biasing member that biases the piston backward or forward relative to the barrel, and further includes a first support member connected to the barrel and a second support member connected to the piston, and is capable of generating the negative pressure by operating the first support member and/or the second support member to reciprocate the piston using the biasing force of the biasing member.
  • the negative pressure can be generated by placing one of the first support member or the second support member on a support surface and stepping on the other of the first support member or the second support member with a foot, thereby operating the first support member and/or the second support member and using the biasing force of the biasing member to reciprocate the piston.

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • External Artificial Organs (AREA)

Abstract

Le cylindre 30 d'une pompe d'aspiration 14 de ce dispositif d'aspiration médical 1 comprend une première partie de soupape 36 qui permet l'entrée d'air à partir d'un espace avant 33 dans un premier passage de ventilation 35 vers un espace arrière 34 lorsqu'un piston 50 se déplace vers l'arrière, et supprime la sortie d'air de l'espace arrière 34 à l'espace avant 33 lorsque le piston 50 se déplace vers l'avant. Le piston 50 est pourvu d'une seconde partie de soupape 52 qui permet la sortie d'air de l'espace arrière 34 dans un second passage de ventilation 51 vers l'extérieur lorsque le piston 50 se déplace vers l'avant, et supprime l'entrée d'air de l'extérieur vers l'espace arrière 34 lorsque le piston 50 se déplace vers l'arrière. La pompe d'aspiration 14 est capable de générer une pression négative pour aspirer une substance biologique lorsque le piston 50 se déplace vers l'arrière.
PCT/JP2025/005475 2024-02-27 2025-02-18 Dispositif médical d'aspiration Pending WO2025182687A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2024027848 2024-02-27
JP2024-027848 2024-02-27

Publications (1)

Publication Number Publication Date
WO2025182687A1 true WO2025182687A1 (fr) 2025-09-04

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PCT/JP2025/005475 Pending WO2025182687A1 (fr) 2024-02-27 2025-02-18 Dispositif médical d'aspiration

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WO (1) WO2025182687A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3142466U (ja) * 2008-04-03 2008-06-12 川澄化学工業株式会社 血栓吸引カテーテル装置
JP5681784B2 (ja) * 2010-03-12 2015-03-11 コントロール・メディカル・テクノロジー，エルエルシー 流量制御弁を有する注射器及び関連した方法
CN111938750A (zh) * 2020-09-14 2020-11-17 上海沃比医疗科技有限公司 手持式血栓负压抽吸泵
CN212326511U (zh) * 2020-09-14 2021-01-12 上海沃比医疗科技有限公司 手持式血栓负压抽吸泵

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3142466U (ja) * 2008-04-03 2008-06-12 川澄化学工業株式会社 血栓吸引カテーテル装置
JP5681784B2 (ja) * 2010-03-12 2015-03-11 コントロール・メディカル・テクノロジー，エルエルシー 流量制御弁を有する注射器及び関連した方法
CN111938750A (zh) * 2020-09-14 2020-11-17 上海沃比医疗科技有限公司 手持式血栓负压抽吸泵
CN212326511U (zh) * 2020-09-14 2021-01-12 上海沃比医疗科技有限公司 手持式血栓负压抽吸泵

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