JP2024060995A - Medical Suction Equipment - Google Patents

Abstract

[Problem] To provide a medical suction device that can be easily attached to and detached from a suction tube, can be prevented from falling off during suction work, and can suck the object to be removed into the suction tube via a porous body. [Means for solving the problem] The medical suction device 1 comprises a cylindrical tube 2 having an air vent opening 8 and a tube insertion opening 9 at one end and the other end, and a porous body 3 that has a communicating structure and is flexible at least in a wet state. The porous body 3 is fixed to one end of the tube 2 to block the air vent opening 8. The medical suction device 1 is detachably attached to the tip of the suction tube 4 by inserting the tip of the suction tube 4 into the tube insertion opening 9 of the tube 2. [Selected Figure] Figure 2

Description

The present invention relates to a medical suction device that is attached to a medical suction tube.

During surgery, if the living tissue of the surgical target is covered with blood, exudates, secretions, cleaning fluids, or solids such as tissue fragments or bone powder, the surgical field cannot be secured. To perform surgery safely and with minimal burden on the patient, it is necessary to secure the surgical field by quickly removing liquids or solids (hereafter referred to as "removal targets") that block the surgical field so that the progress of the surgery is not impeded by these liquids or solids.

In recent years, endoscopic surgery has been replacing open thoracotomy and laparotomy, but it is clear that these non-endoscopic procedures are still necessary. Since non-endoscopic procedures are expected to result in a relatively large amount of bleeding, securing the surgical field is even more important.

Conventional methods for removing the target from the surgical field include inserting absorbent material such as absorbent cotton, gauze, or sponge into the surgical field and using the absorbent material to absorb the target, and removing the target by sucking it up using a suction tube.

When using an absorbent material to absorb fluid from the target, the surgical field is temporarily blocked by the material itself while the fluid is being absorbed, and the surgery must be stopped during that time. Furthermore, when the material no longer has the capacity to absorb fluid, it must be replaced with a new one. Depending on the surgical procedure, a considerable number of absorbents may be used, and the task of counting them to check the amount of bleeding becomes a burden on the nurse.

On the other hand, the method of removing the target by sucking it up with a suction tube has fewer factors that interrupt the progress of the surgery compared to the method of sucking up the liquid with an absorbent material, and is effective in surgeries where it is important not to stop the progress.

In addition, in a method of removing a target object using a suction tube, a configuration has been proposed in which a porous body is inserted into an opening on the tip surface of the suction tube and the porous body is held at the tip of the suction tube, or a configuration in which the tip of the suction tube is inserted into a hole formed in the porous body and the porous body is held at the tip of the suction tube (see, for example, Patent Documents 1 to 3).

Japanese Utility Model Application Publication No. 1-138449 Japanese Utility Model Application Publication No. 5-88552 Japanese Utility Model Application Publication No. 7-22743

In a configuration in which a porous body is held at the tip of the suction tube by inserting the porous body into an opening on the tip surface of the suction tube or by inserting the tip of the suction tube into a hole formed in the porous body, the object to be removed is sucked into the suction tube via the porous body, so even if the object to be removed contains relatively large solid substances (such as clotted blood or tissue fragments), it is possible to capture the large solid substances with the porous body before they reach the suction tube. This makes it possible to prevent a situation in which large solid substances get into the suction tube and clog it, blocking the suction tube and making it impossible to suction, making it even more effective in surgeries where it is important not to stop the progress.

In the configuration in which the porous body is inserted into the opening at the tip of the suction tube as described above, or in which the tip of the suction tube is inserted into a hole formed in the porous body, the porous body and the suction tube are in surface contact, and the holding force of the porous body by the suction tube depends on the static friction force between the suction tube and the porous body.

However, there are always pores on the surface of the porous body, and the pores reduce the contact area between the suction tube and the porous body. This means that sufficient static friction cannot be obtained, and there is a risk that the porous body will fall off the suction tube during the suction procedure. The falling off of the porous body will interrupt the progress of the surgery.

The present invention aims to provide a medical suction device that can suck the object to be removed into a suction tube through a porous body, is easy to attach to and detach from the suction tube, and is unlikely to fall off during the suction operation.

To achieve the above object, the medical suction device of the present invention comprises a cylindrical tube having a vent opening and a tube insertion opening at one end and the other end, and a porous body having a communication structure and being flexible at least in a wet state. The porous body is fixed to one end of the tube to block the vent opening. The medical suction device is detachably attached to the tip of the suction tube by inserting the tip of the suction tube into the tube insertion opening of the tube.

The pore size of the porous body is preferably 60 μm or more and 660 μm or less, and more preferably 130 μm or more and 300 μm or less. The porosity of the porous body is preferably 89% or more and 97% or less. The porous body may also be made of polyurethane resin or polyvinyl acetal resin.

The medical suction device of the present invention can be easily attached to and detached from the suction tube, can be prevented from falling off during the suction operation, and can suck the object to be removed into the suction tube through the porous body.

1 is a perspective view of a medical suction tool according to an embodiment of the present invention; 1 is a side cross-sectional view of a medical suction tool attached to a suction tube. FIG. 3A and 3B are cross-sectional views taken along the line IIIa-IIIa in FIG. 2 and the line IIIb-IIIb in FIG. 2, respectively, showing a state in which the medical suction tool is attached to a suction tube. 11A and 11B are perspective views showing modified examples of the porous body, in which (a) shows an example in which the end face where the tube holding hole is not open is curved into a semispherical shape, and (b) shows an example in which the end face is shaped like a square prism. 1 is a table showing the pore size, porosity, and suction test results of Examples and Comparative Examples.

The medical suction device according to one embodiment of the present invention will be described below with reference to the drawings. In the following description, the axial direction means the direction along the central axis of the tube 2, and the radial direction means the direction perpendicular to the central axis of the tube 2. In addition, each direction of the porous body 3 means the direction when the porous body 3 is fixed to the tube 2.

As shown in Figures 1 to 3, a medical suction tool (hereinafter abbreviated as suction tool) 1 comprises a tube 2 and a porous body 3, and is detachably attached to the tip of a medical suction tube 4. The suction tube 4 and suction tool 1 are used to suck and remove liquids such as bleeding blood, exudates, secretions, and cleaning fluids that cover the living tissue of the surgical subject, as well as solids such as tissue fragments and bone powder (hereinafter, these liquids and solids are referred to as removal targets) during surgical procedures that do not primarily use an endoscope. It is preferable that the suction tool 1 be gentle so as not to damage the living tissue of the surgical subject or its surroundings.

The suction tube 4 is an elongated circular tube made of metal, hard resin, or the like, and defines a flow passage 5 inside. The tip of the suction tube 4 is provided with an end suction opening 6 and two peripheral suction openings 7. The two peripheral suction openings 7 are arranged 180 degrees apart in the circumferential direction of the suction tube 4 and face each other. The base end side of the suction tube 4 is connected to an aspirator (not shown), and the aspirator sucks air in the flow passage 5 along the axial direction (the suction direction is indicated by arrow 20 in FIG. 2). The peripheral suction opening 7 does not necessarily have to be provided. Furthermore, if peripheral suction openings 7 are provided, the number is not limited to two and can be any number (one, three or more).

The tube 2 is cylindrical with open ends and is made of a flexible material (e.g., soft resin). The end opening on one end of the tube 2 forms a vent opening 8, and the end opening on the other end forms a tube insertion opening 9. The inner diameter of the tube 2 is set slightly larger than the outer diameter of the tip of the suction tube 4, and the tip of the suction tube 4 is inserted into the tube 2 through the tube insertion opening 9. The shape of the tube 2 is not limited to a cylindrical shape, and may be set to a tubular shape that matches the outer shape of the tip of the suction tube 4. For example, if the outer shape of the tip of the suction tube 4 is rectangular, a rectangular tubular tube may be used.

The tube 2 is preferably made of a material suitable for medical use, and is sterilized as necessary. For this reason, it is preferable to make it of a material suitable for each sterilization method, such as autoclave sterilization, gas sterilization (EOG sterilization), and radiation sterilization. Also, from a more protective standpoint, a soft material is preferable. By making the tube 2 out of a soft material, it is easier to connect (attach) to the suction tube 4 than when it is made of a hard material.

The porous body 3 is cylindrical with a bottomed tube holding hole 10 that has a circular cross section, and has a structure in which the pores are connected in three dimensions. The porous body 3 is formed from a porous material that is flexible at least in a wet state. The porous material may be flexible in both a wet state and a dry state, and may be hardened in a dry state.

The porous body 3 is sterilized as necessary. For this reason, it is preferable to form it from a porous material suitable for each sterilization method, such as autoclave sterilization, gas sterilization (EOG sterilization), or radiation sterilization.

One end surface of the porous body 3 is a circular flat surface, and the tube holding hole 10 is disposed coaxially with the porous body 3 and recessed from the other end surface of the porous body 3. The inner diameter of the tube holding hole 10 is set to be approximately the same as or slightly smaller than the outer diameter of the tube 2, and the depth (axial length) of the tube holding hole 10 is set to be shorter than the overall length (axial length) of the tube 2. In this embodiment, the overall length (axial length) of the porous body 3 and the overall length of the tube 2 are set to be approximately the same, and the depth of the tube holding hole 10 is set to about 1/2 the overall length of the porous body 3 (about 1/2 the overall length of the tube 2).

The end face thickness D1 of the porous body 3 (the axial distance between one end face of the porous body 3 and the bottom face of the tube holding hole 10) is set to be thicker (longer) than the circumferential thickness D2 (the radial distance between the inner circumferential surface of the tube holding hole 10 and the outer circumferential surface of the porous body 3). The circumferential thickness D2 of the porous body 3 is set to be 3 mm or more and 10 mm or less.

One end of the tube 2 is fixed to the porous body 3 while inserted into the tube holding hole 10, and the other end of the tube 2 extends from the other end face of the porous body 3 and is exposed to the outside. In other words, the porous body 3 is fixed to one end of the tube 2 to block the ventilation opening 8, and the internal space of the tube 2 is connected to the outside via the ventilation opening 8 and the continuous pores of the porous body 3.

The tip of the suction tube 4 is inserted into the tube 2 along the axial direction from the tube insertion opening 9 until it reaches a predetermined mounting position where the end surface suction opening 6 is close to or in contact with the bottom surface of the tube holding hole 10. In the suction tool mounting state where the tip of the suction tube 4 is inserted to the predetermined mounting position in the tube 2, the end surface suction opening 6 of the suction tube 4 faces the bottom surface of the tube holding hole 10 of the porous body 3, and the two peripheral surface suction openings 7 are closed by the tube 2. In other words, the overall length of the tube 2 is set to a length that overlaps and closes the peripheral surface suction openings 7 in the suction tool mounting state.

When the suction tool is attached, the air in the flow passage 5 of the suction tube 4 is sucked in by the suction device, and the air outside the suction tool 1 is sucked in and flows into the flow passage 5 through the porous body 3 and the ventilation opening 8 of the tube 2. The inner surface of the tube 2 is also sucked into the flow passage 5 through the peripheral suction opening 7.

The shape of the porous body 3 is not limited to a cylindrical shape, but may be other shapes such as a shape in which the end face where the tube holding hole 10 is not open is curved into a hemisphere (see FIG. 4(a)), or a polygonal prism shape such as a square prism shape (see FIG. 4(b)).

In this embodiment, the suction tool 1 is manufactured by inserting the tube 2 into the tube holding hole 10 formed in the porous body 3 and then fixing the tube 2 and the porous body 3 with an adhesive or the like. The tube holding hole 10 can be formed by cutting the porous body 3 in a dry state with a drill or the like, or by compressing a portion of the porous body 3 by heat pressing to make it concave. In the heat pressing method, the pores may be crushed by compression, reducing the suction ability of the suction tube 4, so the cutting method is preferable.

When forming the porous body 3 by chemically reacting a mixed liquid containing raw materials and the like in a specified mold, the porous body 3 may be molded integrally with the tube 2 by placing the tube 2 in the mixed liquid in the mold and causing the chemical reaction.

In the integral molding, the porous body 3 enters the tube 2 through the ventilation opening 8, and the insertion length of the tip of the suction tube 4 into the tube 2 is reduced by the porous body 3 entering the tube 2. When the insertion length of the suction tube 4 is reduced, the holding force of the suction tool 1 by the suction tube 4 also decreases. In order to ensure that the insertion length of the suction tube 4 is the same as in the case of post-processing, the overall length of the tube 2 needs to be increased more than in the case of post-processing, which leads to an increase in the size of the suction tool 1. For this reason, in order to suppress the increase in size of the suction tool 1 and ensure the holding force, post-processing is more preferable than the integral type. On the other hand, in order to reduce the number of steps by omitting the process of forming the tube holding hole 10 in the porous body 3 and the process of fixing the tube 2 and the porous body 3, the integral type is more preferable than the post-processing.

When the porous body 3 is brought into contact with the object to be removed that is blocking the surgical field (liquids such as bleeding blood, exudates, secretions, and cleaning fluids, or solids such as tissue fragments and bone powder), the liquid to be removed moves to the porous body 3 due to the diffusion force of the liquid caused by capillary action, and is retained in the porous body 3.

In addition, when the porous body 3 with the suction tool attached is brought close to or into contact with the object to be removed and sucked up by the aspirator, most of the object to be removed passes through the continuous pores of the porous body 3 and is discharged from the air vent opening 8 through the flow passage 5 of the suction tube 4. Solids (solid substances) of the object to be removed that are too large to pass through the continuous pores of the porous body 3 are captured by the porous body 3.

The size of the pores (pore diameter) of the porous body 3 is preferably smaller than that of relatively large solid substances (such as clotted blood or tissue fragments) that are likely to cause clogging of the suction tube 4 among the objects to be removed, and larger than that of relatively small solid substances that are unlikely to clog the suction tube 4. This is to prevent clogging of the suction tube 4 while reducing the frequency of replacement of the suction tool 1 due to clogging of the porous body 3.

The porosity of the porous body 3 affects the suction speed of the aspirator. If the porosity is low, the suction speed decreases and the ability to suction and remove the target to be removed is insufficient. On the other hand, if the porosity is too high, the porous body 3 does not form a stable shape.

The preferred ranges for the pore size and porosity of the porous body 3 are a pore size of 60 μm or more and 660 μm or less and a porosity of 50% or more and 97% or less. This is to prevent clogging of the suction tube 4, reduce the frequency of replacement of the suction tool 1 due to clogging of the porous body 3, and ensure a practically necessary suction speed. An even more preferred range is a pore size of 130 μm or more and a porosity of 89% or more. This is to significantly reduce the frequency of replacement of the suction tool 1 due to clogging of the porous body 3, and ensure a good suction speed when suctioning large amounts.

The pore size of the porous body 3 affects the movement (liquid absorption) and retention (liquid retention) of liquid due to capillary action. If the pore size is larger than 300 μm, the liquid diffusion power due to capillary action decreases, resulting in a decrease in liquid absorption and liquid retention. If the pore size is larger than 660 μm, the surface of the porous body 3 must be pressed against the living tissue of the surgical subject in order to continuously absorb a small amount of liquid that has slightly seeped out from blood vessels, etc., and the feeling of use for the surgeon is reduced. In addition, the surface of the porous body 3 becomes rough due to the large pores, and the protective effect obtained by the flexible porous body 3 is reduced. In order to ensure the liquid absorption and liquid retention power due to capillary action and not impair the protective effect of the porous body 3, the pore size is preferably 660 μm or less, and more preferably 300 μm or less.

The pore diameter is a value indicating the size of the pores in the porous body 3, and is the most frequent value in the distribution of the obtained pore diameters. For example, it is detected by a mercury intrusion porosimeter (manufactured by Quantachrome).
The above porosity is a value calculated from the apparent volume and true volume of the porous body 3, which is measured by a dry automatic density meter after being thoroughly dried in a dryer, using the following formula (1) from the true volume and apparent volume of the porous body 3.
Porosity (%)=(apparent volume−true volume)/apparent volume×100 (1)

The porous material that forms the porous body 3 can be, for example, a resin porous material made of polyurethane, polyolefin, fluororesin, cellulose, polyethylene, polypropylene, silicone, polystyrene-based elastomer, polyvinyl acetal, etc., or a biologically derived porous material made of gelatin, collagen, etc.

The porous material is preferably one that can be sterilized and has excellent liquid absorption and retention properties. Specifically, polyvinyl acetal resin and polyurethane resin are suitable. Polyvinyl acetal resin is particularly preferred because it hardens in a dry state, making it easier to process, such as by cutting, compared to resins that are flexible even in a dry state (such as polyurethane resin), and it softens in a wet state to have the desired flexibility. For example, PVA sponge sold by AION Co., Ltd. can be used as a polyvinyl acetal resin porous material.

The suction device 1 of this embodiment is attached to the tip of the suction tube 4 by inserting the tip of the suction tube 4 to a predetermined attachment position in the tube 2 (suction device attached state), and is removed by removing the tip of the suction tube 4 from inside the tube 2. Therefore, the suction device 1 can be easily attached and detached from the suction tube 4.

The porous body 3 is fixed to one end of the tube 2 to block the ventilation opening 8, and the internal space of the tube 2 is connected to the outside via the ventilation opening 8 and the continuous pores of the porous body 3. Therefore, when the suction tool is attached, the object to be removed can be brought close to or into contact with the porous body 3 and sucked in by the aspirator, so that the object to be removed can be sucked into the suction tube 4 through the porous body 3. In addition, if the suction tube 4 has a suction force adjustment function, suction can be performed without impairing the suction force adjustment function.

When the suction tool is attached, the inner surface of the tube 2, not the porous body 3, is in surface contact with the outer surface of the suction tube 4, so that the suction tool 1 can be held in place by sufficient static frictional force, preventing the suction tool 1 from falling off during the suction operation.

The end surface thickness D1 of the porous body 3 is set to be longer than the peripheral surface thickness D2, so that one end surface of the porous body 3 and one end surface of the tube 2 (vent opening 8) are sufficiently separated. Therefore, when one end surface of the porous body 3 is brought into contact with the biological tissue of the surgical target in order to remove the target, the flexibility of one end of the porous body 3 is not impaired by the tube 2, making it possible to make a gentle suction tool 1.

Since roughly half of the total length of the tube 2 is covered with the flexible porous body 3, the tube 2, which is harder than the porous body 3, is less likely to come into contact with living tissue, making it possible to make the suction device 1 gentler.

The inner surface of the tube 2 is sucked toward the flow passage 5 of the suction tube 4 through the peripheral suction opening 7, so that the suction tool 1 can be firmly held by the suction tube 4, making it even more difficult for the suction tool 1 to fall off.

Since the peripheral thickness D2 of the porous body 3 is 3 mm or more, when forming the tube holding hole 10 by cutting, the processing can be performed relatively easily. In addition, since the peripheral thickness D2 is 10 mm or less, an increase in air flow resistance due to an excessive increase in the peripheral thickness D2 is suppressed, and a decrease in suction capacity can be prevented.

Next, the present invention will be described with reference to FIG. 5 and examples, but the present invention is not limited in any way to the described examples.

Example 1
A polyvinyl acetal resin porous body (hereinafter referred to as PVAt sponge) with a pore diameter of 60 μm and a porosity of 89% was used as the porous body 3. The porous body 3 in a dry state was processed into a cylindrical shape with an outer diameter of 14 mm and a height (total length) of 22 mm, and a tube holding hole 10 with a depth of 12 mm was formed in the center of one end face. The inner diameter of the tube holding hole 10 during processing (dry state) was formed so as to be approximately equal to the outer diameter (8.4 mm) of the tube in a wet state. A tube 2 with an outer diameter of 8.4 mm, an inner diameter of 6 mm, and a total length of 24 mm was inserted and bonded into the formed tube holding hole 10 to prepare a suction tool 1. The prepared suction tool 1 was sterilized in an autoclave and attached to a general-purpose suction tube 4 to perform a suction test.

In the suction test, the suction device 1 was placed in the test liquid in the test container, and 100 ml of the test liquid was sucked up using a pump with an exhaust speed of 12 L/min. The time from the start of suction to the completion of suction of 100 ml (the entire amount in the test container) was measured as the suction time. In addition, when suction was completed, the porous body 3 was brought into contact with the test liquid remaining to the end on the inner surface (mainly the bottom surface) of the test container, and the presence or absence of remaining water droplets was visually confirmed.

A 13% aqueous solution of WA#1500 (white fused alumina) was used as the test liquid. When the number of particles in the test liquid was measured, the number of particles of 10-20 μm, which corresponds to white blood cells, was 7,217,600 particles/ml, which is similar to the average human white blood cell count of 7,000,000 particles/ml. In addition, the number of particles of 8 μm or less was 56,383,600 particles/ml, the number of particles of 8-9 μm was 39,093,600 particles/ml, and the number of particles of 21-24 μm was 26,000 particles/ml.

In addition, a cleaning container was prepared in addition to the test container, and if the porous body 3 became clogged and suction was no longer possible before suction of 100 ml of the test liquid was completed, suction was temporarily interrupted, rinsed once with the cleaning water in the cleaning container, and suction was resumed. In one rinse, the suction tool 1 (porous body 3) was immersed in the cleaning water and stirred in the water for several seconds. The interruption time for rinsing was not included in the suction time.

The result of the suction test was that the PVAt sponge became clogged during suction, making suction impossible, so rinsing was performed once and suction of 100 ml was completed. The suction time was 200 seconds. No water droplets remained on the inner surface of the test container.

Example 2
A suction tool 1 was produced in the same manner as in Example 1 using a PVAt sponge with a pore size of 80 μm and a porosity of 89%.

The result of the suction test was that the PVAt sponge became clogged during suction, making suction impossible, so rinsing was performed once and 100 ml was suctioned. The suction time was 123 seconds. No water droplets remained on the inner surface of the test container.

Example 3
A suction tool 1 was produced in the same manner as in Example 1 using a PVAt sponge with a pore size of 130 μm and a porosity of 90%.

The result of the suction test was that 100 ml was suctioned without any interruptions. The suction time was 90 seconds. No water droplets remained on the inner surface of the test container.

Example 4
A suction tool 1 was produced in the same manner as in Example 1 using a PVAt sponge with a pore size of 200 μm and a porosity of 91%.

The result of the suction test was that 100 ml was suctioned without any interruptions. The suction time was 65 seconds. No water droplets remained on the inner surface of the test container.

Example 5
A suction tool 1 was produced in the same manner as in Example 1 using a PVAt sponge with a pore size of 300 μm and a porosity of 91%.

The result of the suction test was that 100 ml was suctioned without any interruptions. The suction time was 60 seconds. No water droplets remained on the inner surface of the test container.

Example 6
Using a polyurethane resin porous body having a pore size of 660 μm and a porosity of 97%, the suction tool 1 was produced in the same manner as in Example 1. The suction tool 1 was not sterilized by autoclaving.

The result of the suction test was that 100 ml was suctioned without any interruptions. The suction time was 20 seconds. The suction was completed by pressing the polyurethane resin porous body against the container, but a few water droplets remained on the inner surface of the test container.

(Comparative Example 1)
A suction tool was produced in the same manner as in Example 1 using a PVAt sponge with a pore size of 15 μm and a porosity of 87%.

The result of the suction test was that after 10 ml had been sucked up, a blockage occurred and suction became impossible, and even after rinsing, the inability to suction was not resolved, and suction was left incomplete.

(Comparative Example 2)
A suction tool was produced in the same manner as in Example 1 using a PVAt sponge with a pore size of 700 μm and a porosity of 90%.

The result of the suction test was that 100 ml was suctioned without any interruptions. The suction time was 20 seconds. Water droplets remained on the inner surface of the test container, and the liquid could not be absorbed by the PVAt sponge.

(Comparative Example 3)
A suction tool was produced using a polyurethane resin porous body having a pore size of 850 μm and a porosity of 98% in the same manner as in Example 1. The suction tool was not sterilized by autoclaving.

The result of the suction test was that 100 ml was suctioned without any interruptions. The suction time was 20 seconds. Water droplets remained on the inner surface of the test container, and the polyurethane resin porous body was not able to absorb the liquid.

The results of the suction test showed that the pore diameter of the porous body 3 is preferably 60 μm to 660 μm, and more preferably 130 μm to 300 μm. It was also found that the porosity is preferably 89% to 97%.

The present invention is not limited to the above-described embodiment and its examples, which are described as examples, and various modifications can be made according to the design, etc., even if they are not within the scope of the technical concept of the present invention.

The present invention can be widely used as a medical suction device that is attached to a medical suction tube.

1: Medical suction device 2: Tube 3: Porous body 4: Suction tube 5: Flow passage 6: End surface suction opening 7: Peripheral surface suction opening 8: Ventilation opening 9: Tube insertion opening 10: Tube holding hole

Claims (4)

a cylindrical tube having a ventilation opening and a tube insertion opening at one end and the other end;
A porous body having an interconnected structure and being flexible at least in a wet state;
the porous body is fixed to the one end of the tube to close the ventilation opening;
A medical suction tool that is detachably attached to a tip end of a suction tube by inserting the tip end of the suction tube into the tube insertion opening of the tube. The medical suction device according to claim 1,
A medical suction instrument, wherein the pore size of the porous body is 60 μm or more and 660 μm or less. The medical suction device according to claim 1 or 2,
A medical suction instrument, wherein the porosity of the porous body is 89% or more and 97% or less. The medical suction device according to claim 1 or 2,
The medical suction tool, wherein the porous body is made of polyurethane resin or polyvinyl acetal resin.

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