TWI781613B - Drainage catheter having capability for reducing the irrigation resistance - Google Patents

Abstract

A drainage catheter that can reduce flushing resistance, the drainage catheter has a flexible tube, and the flexible tube is connected to a catheter joint; a flushing channel of the flexible tube is fluidly connected with multiple flushing holes, and the flexible tube is connected to a plurality of flushing holes. A drainage channel is fluidly connected to a plurality of axial drainage grooves; a flushing joint of the conduit joint is fluidly connected to the flushing channel, and a drainage joint of the catheter joint is fluidly connected to the drainage channel; the flushing joint is provided with a sealing element, and the sealing element can be An injection element passes through to inject a liquid; the total flow area formed by the plurality of axial drainage grooves on the surface of the flexible tube is greater than the total flow area formed by the plurality of flushing holes on the surface of the flexible tube, so as to reduce Flush the resistance and relieve the patient's pain.

Description

Drain catheters that reduce irrigation resistance

The present invention relates to a drainage catheter, in particular to a drainage catheter that can reduce flushing resistance. The drainage catheter has a flexible catheter and a catheter joint. The flexible catheter can be partially placed Into a wound, irrigation liquid or medicine can be injected into the wound through the catheter joint and the flexible tube, and the drainage catheter can drain the wound fluid.

Known technology such as U.S. No. US10814110B2 patent, the main disclosed technology is a drainage catheter (drainage catheter) used for patients who need to drain accumulated fluid, please refer to the 6A figure of this known technology patent, the drainage catheter (610 ) includes a lumen coupled to irrigation port (618) and to opening (620) positioned within abscess (606) to deliver irrigation fluid into abscess (606).

The patent family of known technology includes Canadian Patent No. CA3038516A1, European Union Patent No. EP3448486A1 and Australian Patent No. AU2017218392B2. A physician may apply irrigation fluid to irrigation port (618), introduce irrigation fluid through opening (620), and finally, drain catheter (610) to drain accumulated fluid. During irrigation and drainage, the known technique flushes The problem of resistance (irrigation resistance), the accumulation of fluid will also cause irrigation pressure (irrigation pressure) and pain for the patient. Therefore, this prior art still needs to be improved.

The object of the present invention is to provide a drainage catheter that can reduce flushing resistance, and the drainage catheter includes a flexible tube, a catheter joint and a sealing element; An irrigation passage of the flexible tube is fluidly connected to a plurality of irrigation holes, and a drainage passage of the flexible tube is fluidly connected to a plurality of axial drainage grooves; A catheter joint is connected to the flexible tube, a flushing joint of the catheter joint is in fluid communication with the flushing channel, a drainage joint of the catheter joint is in fluid communication with the drainage channel; the sealing element is used to seal the flushing joint, and the sealing element It can be passed by an injection element to inject a liquid into the irrigation joint; wherein the total circulation area (total circulation area) formed by the plurality of axial drainage grooves on the surface of the flexible tube is larger than that of the plurality of irrigation holes on the flexible tube The total flow area formed by the surface of the tube in order to reduce the irrigation resistance (irrigation resistance).

The advantage of the present invention (1) is that the combination of the plurality of irrigation holes and the plurality of axial drainage grooves can reduce the irrigation resistance, so as to avoid excessive irrigation pressure and reduce the patient's pain.

The effect (2) of the gain of the present invention is that the drainage catheter can utilize a sealing element to seal the irrigation joint, and the sealing element can be passed through by an injection element To inject flushing fluid or medicine to ensure cleanliness, sanitation and safe use.

The effect (3) of the gain of the present invention is that the flushing direction of the plurality of flushing holes is the lateral direction of the flexible tube, and the drainage direction of the plurality of axial drainage grooves is the axial direction of the flexible tube, which is conducive to the discharge of wound fragments ( wound debris) or clots.

10: flexible tube

11a: the front end of the flexible tube

11: Confluence section

13: drainage section

131: flushing area

132: hemispherical part

14: Transverse rib

15: flushing channel

16: drainage channel

17: Rinsing hole

18: Axial drainage groove

181: sector

182: rectangle

19: Upright ribs

20: Conduit connector

21: Flush connector

211: Flush the inner cavity

22: drainage connector

221: drainage lumen

23: Rinse the entrance

24: drainage outlet

25: Rinse connection channel

26: drainage connection channel

30: sealing element

31: Shell

[Fig. 1] is a three-dimensional schematic diagram of a preferred embodiment of the present invention.

[Fig. 2] is a three-dimensional exploded schematic diagram of a preferred embodiment of the present invention.

[FIGS. 3A to 3C] are sectional views of part A-A of FIG. 1. FIG.

[Fig. 4] is a three-dimensional schematic diagram of a flexible tube in a preferred embodiment of the present invention.

[FIG. 5] is a B-B sectional view of FIG. 4.

[FIG. 6] is a C-C sectional view of FIG. 4.

[FIG. 7] is a D-D sectional view of FIG. 4.

[FIG. 8] It is a sectional view along E-E of FIG. 4.

[FIG. 9] is a partial perspective view of the confluence section of the preferred embodiment of the present invention.

[Fig. 10] is a schematic diagram of confluence of flexible pipes in a preferred embodiment of the present invention.

[Fig. 11] is a partial perspective view of the drainage section of the preferred embodiment of the present invention.

[FIG. 12] is a partial perspective view of the flushing area of a preferred embodiment of the present invention.

[FIG. 13] is a partial perspective view of the drainage section of the second embodiment of the present invention.

[FIG. 14] is a partial perspective view of the flushing area of the second embodiment of the present invention.

In order to further understand the features, technical means and achieved results of the present invention The specific function and purpose of making, enumerate more specific embodiment hereby, follow the detailed description of drawing figure number as after.

Please refer to Figs. 1 to 7, in a preferred embodiment, the drainage catheter that can reduce flushing resistance of the present invention includes a flexible tube 10, a catheter connector 20 and a sealing element 30; the flexible tube 10 There is a flushing channel 15 and a drainage channel 16, the flushing channel 15 is fluidly connected to a plurality of flushing holes 17, and the drainage channel 16 is fluidly connected to a plurality of axial drainage grooves 18; the catheter joint 20 is connected to the front end 11a of the flexible tube 10 , the catheter connector 20 has a flushing joint 21 and a drainage joint 22, the flushing joint 21 is fluidly connected to the flushing channel 15, and the drainage joint 22 is fluidly connected to the drainage channel 16; the sealing element 30 is used to seal the flushing joint 21, And the sealing element 30 can be penetrated by an injection element to inject a liquid (such as flushing liquid or medicine) to the flushing joint 21; The area is greater than the total flow area formed by the plurality of flushing holes 17 on the surface of the flexible tube 10 . Therefore, the combination of the plurality of flushing holes 17 and the plurality of axial drainage grooves 18 can reduce the flushing resistance, so as to avoid excessive flushing pressure and reduce the patient's pain. Furthermore, the sealing element 30 can ensure the cleanliness, sanitation and safety of the flushing connector 21 .

The confluence mode of the flexible tube 10 is illustrated: a confluence section 11 of the flexible tube 10 is separated by a transverse rib 14 to form the flushing channel 15 and the drainage channel 16, and the injected liquid L1 enters the flushing channel 15 (as shown in Figure 5 and Figure 9), the liquid L2 drained by the plurality of axial drainage grooves 18 converges into the drainage channel 16 (as shown in Figure 6 and Figure 10), and the drainage joint 22 is fluidly connected to the confluence Section 11 (as shown in Figure 3 A to 3C). The material of the flexible tube 10 can be selected from silicon material, polyvinyl chloride (PVC) material or polypropylene (PP) material.

The drainage mode of the flexible tube 10 is illustrated by enumerating: a drainage section 13 of the flexible tube 10 is separated by a transverse rib 14 to form the irrigation channel 15, and a plurality of axial drainage grooves 18 are arranged in a strip shape In the drainage section 13, and the drainage section 13 is separated by an upright rib 19 to form the plurality of axial drainage grooves 18 (as shown in Figure 7 and Figure 11); wherein the cross section of the flushing channel 15 is half A part of a circle or a semicircle, the cross section of each axial drainage groove 18 is an arrow shape formed by a sector 181 and a rectangle 182 (as shown in FIG. 7 ).

The flushing method of the flexible tube 10 is illustrated by enumerating: the drainage section 13 has a flushing area 131, a plurality of flushing holes 17 are arranged on the pipe wall of the flushing area 131, each flushing hole 17 and each axial drainage groove 18 form The included angle A is between 90° and 180° (as shown in Figure 82); the injected liquid L1 is flushed and diffused through each flushing hole 17, and the drained liquid L2 is passed through each axial drainage groove 18 for drainage (as shown in Figure 12).

Enumerate and illustrate the effects gained by the flexible tube 10: the flushing direction of the plurality of flushing holes 17 is the lateral and annular direction of the flexible tube 10, and the drainage direction of the plurality of axial drainage grooves 18 is the direction of the flexible tube 10. Axial (as shown in FIG. 10 and FIG. 12 ), therefore, under the joint action of multiple irrigation holes 17 and multiple axial drainage grooves 18 , it is beneficial to discharge wound debris or clots.

Enumerate and illustrate the different implementations of the drainage section 13: in a preferred embodiment, the drainage section 13 has a hemispherical portion 132, the irrigation channel 15 and a plurality of axial drainage grooves 18 runs through the hemispherical part 132, so that the end of the flexible tube 10 can be flushed and drained, and the injected liquid L1 is dispersed in the lateral direction of the flexible tube 10, the circular direction and the flexible tube 10. At the end, the drained liquid L2 is drained through each axial drainage groove 18 and the end of the flexible tube 10 (as shown in FIG. 11 and FIG. 12 ). In the second embodiment, the drainage section 13 has a hemispherical portion 132, and the irrigation channel 15 and the plurality of axial drainage grooves 18 do not penetrate the hemispherical portion 132, so that the end of the flexible tube 10 does not perform irrigation and drainage. , the injected liquid L1 is concentrated in the lateral and annular directions of the flexible tube 10, and the drained liquid L2 is drained through each axial drainage groove 18 (as shown in FIGS. 13 and 14 ).

.Please refer to FIGS. 3A to 3C , which illustrate the fluid communication method between the catheter connector 20 and the flexible tube 10: the flushing joint 21 of the catheter connector 20 has a flushing cavity (irrigation cavity) 211, and the flushing cavity 211 In fluid communication with an irrigation connection channel 25 , the irrigation connection channel 25 is in fluid communication with the irrigation channel 15 . Moreover, the drainage joint 22 of the catheter joint 20 has a drainage cavity 221 , and the drainage cavity 221 is in fluid communication with a drainage connection channel 26 , and the drainage connection channel 26 is in fluid communication with the drainage channel 16 .

Please refer to FIGS. 3A to 3C , which illustrate the implementation method of the inlet of the irrigation joint 21 and the outlet of the drainage joint 22: the irrigation joint 21 has an irrigation inlet (irrigation inlet) 23, and the outer side of the sealing element 30 further has a shell Body 31, the sealing element 30 can be fixed on the flushing inlet 23 by the housing 31; Drained fluid.

10: flexible tube

11a: the front end of the flexible tube

14: Transverse rib

15: flushing channel

16: drainage channel

17: Rinsing hole

20: Conduit connector

21: Flush connector

22: drainage connector

23: Rinse the entrance

24: drainage outlet

30: sealing element

31: Shell

Claims (10)

A drainage catheter that can reduce flushing resistance, the drainage catheter includes: a flexible tube (10), with a flushing channel (15) and a drainage channel (16), and the flushing channel (15) is in fluid communication with a plurality of flushing holes ( 17), the drainage channel (16) is in fluid communication with a plurality of axial drainage grooves (18); a catheter connector (20), the catheter connector (20) is connected to the front end (11a) of the flexible tube (10), the The conduit connector (20) has a flushing connector (21) and a drainage connector (22), the flushing connector (21) is fluidly connected to the flushing channel (15), and the drainage connector (22) is fluidly connected to the drainage channel (16); A sealing element (30), the sealing element (30) is used to seal the flushing joint (21), and the sealing element (30) can be penetrated by an injection element to inject a liquid into the flushing joint (21); wherein The total flow area formed by the plurality of axial drainage grooves (18) on the surface of the flexible tube (10) is greater than the total flow area formed by the plurality of flushing holes (17) on the surface of the flexible tube (10), to reduce flushing resistance. The drainage catheter capable of reducing flushing resistance as described in Claim 1, wherein a confluence section (11) of the flexible tube (10) is separated by a transverse rib (14) to form the flushing channel (15) and the drainage The channel (16), the liquid drained by the plurality of axial drainage grooves (18) converges into the drainage channel (16), and the drainage joint (22) is fluidly connected to the confluence section (11), and the flexible tube (10 ) is made of silicon material. The drainage catheter capable of reducing flushing resistance as described in Claim 1, wherein a drainage section (13) of the flexible tube (10) is separated by a transverse rib (14) to form the flushing channel (15), and the plurality of shafts A direction drainage groove (18) is arranged on the drainage section (13), and the drainage section (13) is separated by an upright rib (19) to form the plurality of axial drainage grooves (18). The drainage catheter that can reduce flushing resistance as described in claim item 3, wherein the cross-section of the flushing channel (15) is a part of a semicircle or a semicircle, and the cross-section of each axial drainage groove (18) is formed by An arrow shape formed by a sector (181) and a rectangle (182). The drainage catheter that can reduce the flushing resistance as described in claim 3, wherein the drainage section (13) has a flushing area (131), and a plurality of flushing holes (17) are arranged on the tube wall of the flushing area (131), and each flushing The included angle (A) formed by the hole (17) and each axial drainage groove (18) is between 90 degrees and 180 degrees. The drainage catheter capable of reducing flushing resistance as described in claim 3, wherein the drainage segment (13) has a hemispherical portion (132), and the flushing channel (15) and multiple axial drainage grooves (18) run through the hemispherical portion (132). The drainage catheter that can reduce flushing resistance as described in claim 3, wherein the drainage section (13) has a hemispherical portion (132), and the flushing channel (15) and the plurality of axial drainage grooves (18) do not penetrate the hemispherical portion Ministry (132). The drainage catheter that can reduce flushing resistance as described in claim 1, wherein the flushing joint (21) has a flushing lumen (211), and the flushing lumen (211) is fluidly connected to a flushing connection channel (25), and the flushing connection A channel (25) is in fluid communication with the irrigation channel (15). The drainage catheter that can reduce flushing resistance as described in claim 1, wherein the drainage joint (22) has a drainage lumen (221), and the drainage lumen (221) is fluidly connected to a drainage connection channel (26), and the drainage connection A channel (26) is in fluid communication with the drainage channel (16). The drainage catheter that can reduce flushing resistance as described in claim 1, wherein the flushing joint (21) has a flushing inlet (23), and the sealing element (30) further has a housing (31) to be fixed on the flushing inlet ( 23); the drainage joint (22) has a drainage outlet (24), and the drainage outlet (24) is used to discharge the liquid drained by the plurality of axial drainage grooves (18).

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