Filter ball

Abstract

The present invention relates to a filter ball in which resistance grooves (11) are formed on the outer circumferential surface of a spherical body (10) such that, when injected into a tubular medical device (M) along with a cleaning solution, frictional resistance generated by the resistance grooves (11) causes the spherical body (10) to rotate while simultaneously inducing a vortex in the cleaning solution, and consequently residual substances adhering to the inner circumferential surface of the tubular medical device (M) are scraped and removed by the combined action of the rotational friction of the spherical body (10) together with the vortex friction of the cleaning solution, thereby maximizing the removal efficiency of the residual substances.

Description

Filter ball

[0001] The present invention relates to a filter ball, and more specifically, to a filter ball that allows for hygienic and clean maintenance of a tubular medical device by maximizing the efficient discharge of residual substances. This is achieved by providing resistance grooves on the outer circumference of a spherical body so that when injected into the interior of a tubular medical device along with a cleaning solution, the spherical body itself rotates due to frictional resistance caused by the resistance grooves, and the cleaning solution also swirls, thereby removing residual substances attached to the inner surface of the tubular medical device by scraping them off through the irregular rotational friction of the spherical body along with the swirling friction of the cleaning solution.

[0002] Generally, endoscopy is a screening method that allows for the examination of internal organs using a flexible endoscope (observation tube); additionally, it is a medical procedure that enables treatment by using endoscopy to perform a biopsy [a process of inserting a small instrument through the endoscope to collect a tissue sample (endoscopic biopsy) and evaluating the collected sample for conditions such as inflammation, infection, or cancer].

[0003] Figure 1 is an internet capture image announced on the MSD manual (msdmanuals.com).

[0004] As shown in Fig. 1, the endoscope is flexible and equipped with a light source and a small camera to allow examination of the lining of organs, such as the digestive tract, and in particular to observe areas of irritation, ulcers, inflammation, and abnormal tissue growth. In such endoscopes, the diameter varies from approximately ¼ inch (slightly larger than ½ centimeter) to approximately ½ inch (1¼ centimeters) and the length varies from approximately 1 foot (approximately 30½ centimeters) to approximately 6 feet (nearly 2 meters).

[0005] When an endoscope is inserted through the mouth, it allows for the examination of the esophagus (esophagoscopy), stomach (gastroscopy), upper small intestine (upper gastrointestinal endoscopy), and a larger portion of the small intestine (small bowel endoscopy); when an endoscope is inserted through the anus, it allows for the examination of the rectum (anoscopy), lower large intestine, rectum and anus (sigmoidoscope), and the entire large intestine, rectum and anus (colonoscopy).

[0006] Figure 2 is a partial photograph showing the cleaning of the endoscope itself according to the prior art.

[0007] An endoscope (E) inserted through the mouth or anus of the human body must be thoroughly cleaned for the next patient. Conventionally, as shown in FIG. 2, a method of removing contaminants using a brush is employed, but in this case, scratches caused by the brush occur on the inner wall of the endoscope (E), which leads to the problem of various bacteria proliferating in the scratched area.

[0008] FIG. 3a is a perspective view showing an endoscope cleaning device according to prior art document 1 (Korean Utility Model Publication No. 2016-0000822), and FIG. 3b is a front view showing an endoscope cleaning device according to prior art document.

[0009] An endoscope cleaning device (1) according to prior art document 1 comprises a connecting wire (100) penetrating the longitudinal center and a cleaning member (200) arranged along the longitudinal direction of the connecting wire (100). The cleaning member (200) is structured to include a first cleaning member (210) arranged in a circumferential shape around the connecting wire (100) and a second cleaning member (220) arranged between the first cleaning member (210) and having a predetermined volume and made of a material having elasticity and absorbency.

[0010] At this time, the connecting wire (100) is composed of a wire having a predetermined length and a relatively thin diameter, and furthermore, the connecting wire (100) is composed of a material that is relatively tough and ductile so as not to be cut or damaged during the cleaning process, such as fiber, synthetic resin, or fine metal.

[0011] However, the endoscope cleaning device (1) according to prior art document 1 has a complex structure and is not easy to insert into the endoscope, so it has the problem of being cumbersome and inconvenient during cleaning.

[0012] FIG. 4a is a perspective view showing a cleaning ball for a tubular medical device according to prior art document 2 (Korean Registered Patent Publication No. 2112671), FIG. 4b is a cross-sectional view showing a cleaning ball for a tubular medical device according to prior art document 2, and FIG. 4c is a conceptual diagram showing a method for manufacturing a cleaning ball for a tubular medical device and a state of use of the cleaning ball according to prior art document 2.

[0013] The cleaning ball for a tubular medical device according to prior art document 2 is formed in a spherical shape having a hollow (101) inside a fiber fabric material having surface roughness as shown in FIGS. 4a to 4c, and includes a polymer (130) having elasticity to maintain the spherical shape inside the hollow (101); and is injected into the tubular medical device (10) together with a cleaning liquid (11) and discharged while scraping away residual material (13) attached to the inner surface of the tubular medical device (10).

[0014] However, the cleaning ball for a tubular medical device according to prior art document 2 has a limitation in that the cleaning efficiency is poor when cleaning the tubular medical device (10) using a cleaning ball containing a polymer (130).

[0015] FIG. 5a is a front view showing a cleaning ball for a tubular medical device according to prior art document 3 (Korean Patent Publication No. 2023-0143870), and FIG. 5b is a schematic cross-sectional view showing a cleaning ball for a tubular medical device according to prior art document 3.

[0016] A cleaning ball for a tubular medical device according to prior art document 3 comprises a base portion (110) having a size and shape that can pass through a tubular medical device (10), an attachment layer portion (120) formed to have adhesive force along the outer surface of the base portion (110), and a cleaning layer (130) formed by integrally combining a fiber material with the attachment layer portion (120) so that the outer surface of the base portion (110) has surface roughness, and is injected into the tubular medical device (10) together with a cleaning liquid (11) and passes through the tubular medical device (10) while scraping and removing residual material (13) attached to the inner surface and then discharged.

[0017] At this time, the base part (110) has a size and shape that can pass through the tubular medical device (10), and specifically is made of a material that has elasticity and expands upon moisture absorption, and the cleaning layer (130) can be made of a fibrous material, such as ultra-fine fiber or non-woven fabric.

[0018] However, in the cleaning ball for a tubular medical device of prior art document 3, the base portion (110) is made of a material that simply has elasticity and expands upon moisture absorption, and the cleaning layer (130) is made of ultrafine fiber or non-woven fabric, so the adhesive force between them is reduced, so residue may remain when cleaning the tubular medical device (10), and furthermore, the cleaning efficiency, which is a limitation of ultrafine fiber or non-woven fabric, is also poor.

[0019] Furthermore, the prior art literature also has limitations in that it cannot maximize cleaning efficiency due to its structure.

[0020] The objective of the present invention is to provide a filter ball that allows for hygienic and clean maintenance of a tubular medical device by maximizing the efficient discharge of residual substances. This is achieved by providing resistance grooves on the outer circumference of a spherical body so that when injected into the tubular medical device along with a cleaning solution, the frictional resistance caused by the resistance grooves rotates the spherical body itself and simultaneously causes the cleaning solution to swirl, thereby removing residual substances attached to the inner surface of the tubular medical device by scraping them off through the rotational friction of the spherical body along with the swirling friction of the cleaning solution.

[0021] The objective of the present invention is to provide a filter ball capable of efficiently discharging residual substances by enabling the irregular rotation of the spherical body with respect to the direction of injection of the cleaning solution, such that the outer periphery of the northern hemisphere is formed as a smooth friction surface with respect to the equator of the spherical body, while the outer periphery of the southern hemisphere is provided with resistance grooves, thereby enabling the spherical body to rotate irregularly with respect to the direction of injection of the cleaning solution when injected into a tubular medical device with an asymmetric weight and shape with respect to the equator of the spherical body, and thereby removing residual substances attached to the inner surface of the tubular medical device by scraping them off with the irregular rotational friction of the spherical body along with the vortex friction of the cleaning solution.

[0022] The objective of the present invention is to provide a filter ball that can further maximize the vortex friction of the cleaning solution along with the irregular rotation of the spherical body with respect to the injection direction of the cleaning solution when injected together with the cleaning solution into a tubular medical device.

[0023] The filter ball according to the present invention for achieving the above purpose is,

[0024] A filter ball that is injected into the interior of a tubular medical device along with a cleaning solution, passes through the tubular medical device, and simultaneously scrapes, removes, and discharges residual material attached to the inner surface of the tubular medical device.

[0025] A spherical body injected together with the cleaning solution into the interior of the above-mentioned tubular medical device, and

[0026] The basic technical feature is that it includes resistance grooves that are recessed in the outer circumference of the spherical body and, when the cleaning solution is injected into the tubular medical device, rotate the spherical body by frictional resistance in the direction of injection of the cleaning solution and simultaneously swirl the cleaning solution to remove residual material attached to the inner surface of the tubular medical device by scraping it with the rotational friction of the spherical body together with the swirling friction of the cleaning solution.

[0027] The present invention provides resistance grooves on the outer circumference of a spherical body so that when injected into a tubular medical device along with a cleaning solution, the frictional resistance caused by the resistance grooves rotates the spherical body itself and simultaneously causes the cleaning solution to swirl, thereby removing residual substances attached to the inner surface of the tubular medical device by scraping them off through the rotational friction of the spherical body along with the swirling friction of the cleaning solution, thereby maximizing the efficient discharge of residual substances and enabling the tubular medical device to be managed hygienically and cleanly.

[0028] The present invention is designed so that the outer periphery of the northern hemisphere is formed as a smooth friction surface relative to the equator of the spherical body, while the outer periphery of the southern hemisphere is provided with resistance grooves. This enables the irregular rotation of the spherical body relative to the direction of injection of the cleaning solution when it is injected into a tubular medical device with an asymmetric weight and shape relative to the equator of the spherical body, thereby allowing the removal of residual material attached to the inner surface of the tubular medical device by scraping it off with the irregular rotational friction of the spherical body along with the vortex friction of the cleaning solution, thereby enabling the efficient discharge of residual material.

[0029] The present invention has the effect of further maximizing the vortex friction of the cleaning solution along with the irregular rotation of the spherical body with respect to the injection direction of the cleaning solution when injected together with the cleaning solution into a tubular medical device.

[0030] Figure 1 is an internet capture image announced on MSD Manuals (msdmanuals.com).

[0031] FIG. 2 is a partial photograph showing the cleaning of an endoscope according to the prior art.

[0032] FIG. 3a is a perspective view showing an endoscope cleaning port according to prior art document 1.

[0033] FIG. 3b is a front view showing an endoscope cleaning port according to the prior art.

[0034] FIG. 4a is a perspective view showing a cleaning ball for a tubular medical device according to prior art document 2.

[0035] FIG. 4b is a cross-sectional view showing a cleaning ball for a tubular medical device according to prior art document 2.

[0036] FIG. 4c is a conceptual diagram showing a method for manufacturing a cleaning ball for a tubular medical device and a state of use of the cleaning ball according to prior art document 2.

[0037] FIG. 5a is a front view showing a cleaning ball for a tubular medical device according to prior art document 3.

[0038] FIG. 5b is a schematic cross-sectional view showing a cleaning ball for a tubular medical device according to prior art document 3.

[0039] FIG. 6 is a structural diagram showing the usage state of a filter ball according to the present invention.

[0040] FIG. 7 is an image showing a filter ball according to the present invention.

[0041] FIG. 8 is a perspective view showing a filter ball according to the present invention.

[0042] FIG. 9 is a front view showing a filter ball according to the present invention.

[0043] Figure 10 is a photograph comparing microfiber fibers and activated carbon.

[0044] FIG. 11 is a conceptual diagram showing the structure of activated carbon applied to a filter ball according to the present invention.

[0045] FIG. 12 is a conceptual diagram illustrating the number of pores per inch of activated carbon applied to a filter ball according to the present invention.

[0046] The best mode for carrying out the present invention is a filter ball that is injected into a tubular medical device (M) together with a cleaning solution and passes through the tubular medical device (M) while scraping away and removing residual material attached to the inner surface of the tubular medical device (M), the filter ball comprising: a spherical body (10) injected into the tubular medical device (M) together with the cleaning solution; and resistance grooves (11) that are recessed into the outer surface of the spherical body (10) and, when the cleaning solution is injected into the tubular medical device (M), rotate the spherical body (10) by frictional resistance in the direction of injection of the cleaning solution, and simultaneously swirl the cleaning solution to scrape away residual material attached to the inner surface of the tubular medical device (M) by the rotational friction of the spherical body (10) together with the swirling friction of the cleaning solution, wherein, when the central transverse line of the spherical body (10) is the equator, the outer surface of the northern hemisphere is formed of a smooth friction surface, and the southern hemisphere The invention relates to a filter ball characterized in that the outer periphery is provided with the resistance grooves (11), and the resistance grooves (11) are provided at equal intervals in the direction of longitude on the outer periphery of the southern hemisphere of the spherical body (10).

[0047] Preferred embodiments of the filter ball according to the present invention will be described with reference to the drawings. There may be multiple embodiments, and through these embodiments, the objectives, features, and advantages of the present invention can be better understood.

[0048] FIG. 6 is a structural diagram showing the usage state of a filter ball according to the present invention, FIG. 7 is an image showing a filter ball according to the present invention, FIG. 8 is a perspective view showing a filter ball according to the present invention, and FIG. 9 is a front view showing a filter ball according to the present invention.

[0049] As shown in FIGS. 6 to 9, the filter ball according to the present invention is injected into the tubular medical device (M) together with a cleaning solution and passes through the tubular medical device (M), thereby allowing residual material attached to the inner surface of the tubular medical device (M) to be scraped away and removed and discharged.

[0050] Specifically, the filter ball according to the present invention may include a spherical body (10) that is injected into the interior of a tubular medical device (M) along with a cleaning solution, and resistance grooves (11) that are recessed in the outer circumference of the spherical body (10) so that when a cleaning solution is injected into the interior of the tubular medical device (M), the spherical body (10) is rotated by frictional resistance in the direction of injection of the cleaning solution, and at the same time, the cleaning solution is vortexed to remove residual substances attached to the inner surface of the tubular medical device (M) by scraping them off with the rotational friction of the spherical body (10) along with the vortex friction of the cleaning solution.

[0051] If the spherical body (10) has a smooth outer periphery without resistance grooves (11), when injected into the tubular medical device (M) along with a cleaning solution, it will be swept along without any resistance in the direction of injection of the cleaning solution and will only pass through, resulting in a phenomenon where residual material attached to the inner surface of the tubular medical device (M) cannot be efficiently removed.

[0052] Accordingly, in the present invention, resistance grooves (11) are provided on the outer circumference of the spherical body (10) so that when the cleaning liquid is injected into the tubular medical device (M) together with the resistance grooves (11), the spherical body (10) itself is rotated by frictional resistance caused by the resistance grooves (11) and the cleaning liquid is also vortexed, thereby removing residual material attached to the inner surface of the tubular medical device (M) by scraping it with the rotational friction of the spherical body (10) along with the vortex friction of the cleaning liquid, so as to maximize the efficient discharge of residual material.

[0053] According to the present invention, when the center transverse line of the spherical body (10) is called the equator, the outer periphery of the northern hemisphere is made of a smooth friction surface, and the outer periphery of the southern hemisphere is provided with resistance grooves (11).

[0054] The spherical body (10) may be formed with symmetric weight and shape in all directions. In this case, when injected into the tubular medical device (M) along with a cleaning solution, it is swept along without any resistance in the direction of injection of the cleaning solution and merely passes through. However, in the present invention, the outer periphery of the northern hemisphere is formed as a smooth friction surface relative to the equator, while the outer periphery of the southern hemisphere is provided with resistance grooves (11). This allows for irregular rotation of the spherical body (10) relative to the direction of injection of the cleaning solution when injected into the tubular medical device (M) along with the cleaning solution, thereby enabling the efficient discharge of residual substances attached to the inner surface of the tubular medical device (M) by scraping and removing them through the irregular rotational friction of the spherical body (10) together with the vortex friction of the cleaning solution. [The smooth friction surface of the outer periphery of the northern hemisphere allows for direct contact with the inner surface of the tubular medical device (M) [Friction guarantee and rotational friction guarantee of the spherical body (10) by resistance grooves (11) on the outer circumference of the southern hemisphere, furthermore vortex friction guarantee of the cleaning fluid].

[0055] Preferably, the resistance grooves (11) are arranged in an equal-spaced longitude direction on the outer periphery of the southern hemisphere of the spherical body (10) to further ensure asymmetry between the outer periphery of the northern hemisphere and the outer periphery of the southern hemisphere. Furthermore, the resistance grooves (11) have a relatively longer vertical length than the horizontal width, so that the surface area of ​​the resistance grooves (11) is smaller as it goes from the equator to the South Pole of the spherical body (10), and even though the resistance grooves (11) are equal-spaced, the surface area of ​​the outer periphery of the southern hemisphere where the resistance grooves (11) are not present becomes vertically asymmetric, thereby further reinforcing the asymmetry of weight and shape between the southern hemisphere and the northern hemisphere, and further maximizing the vortex friction of the cleaning fluid along with the irregular rotation of the spherical body (10) with respect to the injection direction of the cleaning fluid when injected together with the cleaning fluid into the tubular medical device (M).

[0056] In addition, the spherical body (10) is further provided with a circular resistance groove (11) at the North Pole point to further ensure mutual asymmetry with a weight and shape opposite to that of the South Pole point.

[0057] Meanwhile, the spherical body (10) applied to the filter ball according to the present invention may be made of a mixture of polyurethane resin and activated carbon, and preferably may be made of a mixture of 55 to 65 wt% polyurethane resin and 35 to 45 wt% activated carbon.

[0058] Polyurethane resin is a polymer produced by the repeated formation of urethane groups through an addition reaction between an alcohol and an isocyanate. It can be manufactured by reacting a diol or polyol with a diisocyanate or polyisocyanate. When a polyol with a large molecular weight and a small number of alcohols per molecule is used, a soft segment with high fluidity is formed in the resulting polyurethane. Conversely, a cyclic diisocyanate with a rigid structure forms a hard segment due to hydrogen bonding between them. The final physical properties of the polyurethane can be varied through an appropriate combination of these soft and hard segments. In addition, various foaming agents can be used during the process of forming polyurethane to form polyurethane foam. The polyurethane foam can be formed by directly foaming it within a mold of the desired shape. Preferably, a non-isocyanate based polyurethane (NIPU) resin that does not use toxic isocyanates is applied in a range of 55 to 65 wt% [if it is 55 wt% or less, the softness is reduced and may cause scratches on the inner surface of the tubular medical device (M), which is undesirable; if it is 65 wt% or more, it is made excessively soft, which makes thorough cleaning of the tubular medical device (M) difficult, which is undesirable]. That is, a polyurethane resin having soft properties with a large molecular weight and a small number of alcohols per molecule and high fluidity is mixed with activated carbon to produce a spherical body (10) that has impact resistance, wear resistance, rigidity, and heat resistance.

[0059] Activated carbon is a fine carbon powder with particles that are usually spherical, and is a crystalline material with less regularity than graphite, porous, and electrically conductive. When mixed with polyurethane resin [35 to 45 wt% of activated carbon; if less than 35 wt%, the pores cannot be guaranteed (reduction in the adsorption capacity of residual substances), which lowers the wear resistance and flame resistance of the polyurethane resin, and if more than 45 wt%, it hinders the softness of the polyurethane resin, which is undesirable], it acts as a reinforcing filler to improve wear resistance, flame resistance, and further adsorption capacity, thereby supplementing the softness of the polyurethane resin, and especially when cleaning tubular medical devices (M), it enables the effective removal of residual substances along with the inflow of cleaning liquid through the pores.

[0060] FIG. 10 is a photograph comparing microfiber fibers and activated carbon, and FIG. 11 is a conceptual diagram showing the structure of activated carbon applied to a filter ball according to the present invention.

[0061] As shown in (A) of Fig. 10, the microfiber is made of synthetic fibers such as polyester and nylon, like nonwoven fabric, and has a large surface area and a narrow spacing between microfibers, so it has the property of absorbing moisture through capillary action and is mainly suitable for adsorbing dust using static electricity, but it has the disadvantage that thorough cleaning of contaminants is insufficient when cleaning the tubular medical device (M), so contamination and bacterial growth due to residue after cleaning the tubular medical device (M) cannot be avoided.

[0062] On the other hand, as shown in (B) of FIG. 10 and FIG. 11, activated carbon has a porous structure with a surface area of, for example, 1000 to 1600 m² per gram, and has a high adsorption capacity for organic matter, as well as a relatively large effective area through micropores and excellent mechanical strength unique to carbon, so that it is mixed with polyurethane resin to form a spherical body (10), thereby allowing for thorough cleaning of contaminants and precise removal of residues during cleaning of the tubular medical device (M), so that the tubular medical device (M) can be managed more hygienically and more cleanly.

[0063] Furthermore, the spherical body (10) may be further mixed with 5 to 10% wt of silver powder or copper powder.

[0064] Silver (Ag) or copper (Cu) is chemically stable, resistant to corrosion, highly ductile, has good tensile strength, and does not oxidize or rust, so it can ensure the lifespan of the spherical body (10). In particular, it binds to the cell membrane of bacteria to disrupt cell function, and binds to enzymes that play an important role in the respiration process of bacteria, thereby killing bacteria so that they cannot produce energy. Through the antibacterial function, it can eradicate various bacteria within the tubular medical device (M), so it is selectively mixed with 5 to 10% wt of powder [if it is less than 5% wt, the antibacterial action is reduced, and if it is more than 10% wt, the rigidity of the spherical body (10) becomes excessively large, which may cause damage to the inner surface of the tubular medical device (M), so it is not desirable].

[0065] On the other hand, according to the present invention, the spherical body (10) may be made of a mixture of polyester resin and activated carbon, preferably a mixture of 55 to 65 wt% polyester resin and 35 to 45 wt% activated carbon.

[0066] Polyester resin is a polymer material having ester bonds, that is, a polycondensate of polyhydric alcohol and polybasic acid, and has thermoplastic and thermosetting properties, excellent mechanical properties, excellent heat resistance, and especially strong resistance to acidic environments, so that when cleaning a tubular medical device (M), it is not affected by acidification caused by residual substances, and thus allows for the production of a spherical body (10) with a content of 55 to 65 wt% [if it is 55 wt% or less, the thermoplastic and thermosetting properties decrease, which may cause difficulties in manufacturing the spherical body (10), so it is undesirable, and if it is 65 wt% or more, it ensures thermoplastic and thermosetting properties and is not affected by acidification caused by residual substances].

[0067] Activated carbon is a fine carbon powder with particles that are usually spherical. It is a crystalline material with less regularity than graphite, is porous, and has electrical conductivity. When mixed with polyester resin (35 to 45 wt% of activated carbon; if less than 35 wt%, the porosity cannot be guaranteed, which reduces the abrasion resistance and flame resistance of the polyester resin, and if more than 45 wt%, it hinders the flexibility of the polyester resin, which is undesirable), it acts as a reinforcing filler to improve abrasion resistance and flame resistance, thereby complementing the properties of the polyester resin, and particularly when cleaning tubular medical devices (M), it enables the effective removal of residual substances along with the inflow of cleaning liquid through the porosity.

[0068] Furthermore, as shown in (B) of FIG. 10 and FIG. 11, activated carbon has a porous structure with a surface area of, for example, 1000 to 1600 m² per gram, and not only has a high adsorption capacity for organic matter, but also has a relatively large effective area through micropores and excellent mechanical strength unique to carbon, so that when mixed with polyester to form a spherical body (10), the tubular medical device (M) can be managed more hygienically and more cleanly by thoroughly cleaning contaminants and precisely removing residues during cleaning.

[0069] At this time, the spherical body (10) may be further mixed with 5 to 10% wt of silver powder or copper powder, and such silver powder or copper powder is as described above.

[0070] FIG. 12 is a conceptual diagram illustrating the number of pores per inch of activated carbon applied to a filter ball according to the present invention.

[0071] Activated carbon can be applied with 30 to 40 PPI (Pores per Inch; number of pores per inch). If the PPI is 30 or less, it passes roughly through the tubular medical device (M) during cleaning, causing scratches. If the PPI is 40 or more, it is difficult to thoroughly remove contaminants during cleaning the tubular medical device (M), and residue may remain, which is undesirable.

[0072] The present invention is applicable to the industry of medical devices capable of examining internal organs of the human body.

[0073]

Claims

1. A filter ball that is injected into the interior of a tubular medical device (M) together with a cleaning solution, passes through the tubular medical device (M), and simultaneously scrapes, removes, and discharges residual material attached to the inner surface of the tubular medical device (M). The device includes a spherical body (10) that is injected into the interior of the tubular medical device (M) along with the cleaning solution, and resistance grooves (11) that are recessed into the outer periphery of the spherical body (10) and, when the cleaning solution is injected into the interior of the tubular medical device (M), rotate the spherical body (10) by frictional resistance in the direction of injection of the cleaning solution, and simultaneously swirl the cleaning solution to remove residual material attached to the inner surface of the tubular medical device (M) by scraping it with the rotational friction of the spherical body (10) along with the swirling friction of the cleaning solution. When the center transverse line of the above-mentioned spherical body (10) is called the equator, the outer periphery of the northern hemisphere is made of a smooth friction surface, and the outer periphery of the southern hemisphere is provided with the above-mentioned resistance grooves (11). A filter ball characterized in that the resistance grooves (11) are provided at equal intervals in the direction of longitude on the outer circumference of the southern hemisphere of the spherical body (10).

2. In Paragraph 1, The above resistance grooves (11) are characterized by having a relatively longer length in the vertical direction than in the horizontal direction.

3. In Paragraph 1, The above-mentioned spherical body (10) is a filter ball characterized by having a circular resistance groove (11) at the North Pole point.

4. In any one of paragraphs 1 through 3, The above spherical body (10) is a filter ball characterized by being made of a mixture of polyurethane resin and activated carbon.

5. In Paragraph 4, The filter ball is characterized in that the above-mentioned spherical body (10) is made of a mixture of 55-65 wt% of the above-mentioned polyurethane resin and 35-45 wt% of the above-mentioned activated carbon.

6. In Paragraph 5, The above-mentioned spherical body (10) is a filter ball characterized by being further mixed with 5 to 10% wt of silver powder or copper powder.

7. In Paragraph 4, The above activated carbon is a filter ball characterized by having 30 to 40 PPI micropores.

8. In any one of paragraphs 1 through 3, The above-mentioned spherical body (10) is a filter ball characterized by being made of a mixture of polyester resin and activated carbon.

9. In Paragraph 8, The filter ball is characterized by the spherical body (10) being composed of a mixture of 55-65 wt% of the polyester resin and 35-45 wt% of the activated carbon.

10. In Paragraph 9, The above-mentioned spherical body (10) is a filter ball characterized by being further mixed with 5 to 10% wt of silver powder or copper powder.

11. In Paragraph 8, The above activated carbon is a filter ball characterized by having 30 to 40 PPI micropores.

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