Minimally invasive dilatation drainage interventional catheter

Abstract

The utility model discloses a minimally invasive dilatation drainage interventional catheter, which belongs to the technical field of medical instruments and comprises a catheter body and a delivery tube positioned at the top end of the catheter body and fixedly connected with the catheter body. According to the utility model, the first plastic film petals are uniformly arranged at the position, close to the through hole, in the function placement section in the annular array, the first plastic film petals are mutually encircled to form a circular truncated cone shape, and the open ends of the first plastic film petals face the through hole; in addition, the second plastic film petals are evenly arranged at the other end of the function placement section in an annular array mode, the narrow-opening ends of the second plastic film petals face the first plastic film petals, the inner diameter of the narrow-opening ends is the same as that of the catheter body, and therefore the large-particle impurities in the function placement section can be prevented from falling off when the catheter body is pulled out of the body. And when large particles enter the functional placement section, the particles can be blocked, the catheter body is prevented from being blocked, and the practicability is higher.

Description

Technical Field

[0001] The utility model relates to an interventional catheter, in particular to a minimally invasive dilatation and drainage interventional catheter, belonging to the technical field of medical devices. Background Art

[0002] In the prior art, for example, a utility model with application number 201921249411.9 discloses a minimally invasive dilatation drainage catheter. In order to solve the problem of low work efficiency due to the limitation of tube diameter when removing stones with the current drainage tube, the functional placement section has a larger inner diameter, and the inner wall of the functional placement section is provided with a soft semicircular protrusion. When larger stones or other particles are sucked into the catheter through a negative pressure machine, the protrusion can prevent the stones or other particles from falling, thereby having the function of exporting large particles.

[0003] Similar to the above application, there are still some shortcomings:

[0004] 1. The setting of the protrusion not only leads to a reduction in the inner diameter of the functional placement end, but also the shielding effect of the arc-shaped protrusion surface is poor, which is easy to cause the particles to fall during the catheter withdrawal process. In addition, when large particles enter the interior of the functional placement section, it is easy to cause the catheter to be blocked, affecting the particle extraction effect;

[0005] 2. The position of the negative pressure interface is fixed. When the position of the delivery tube is inconvenient, the negative pressure interface cannot be adjusted, which easily hinders the use of the catheter when connecting the negative pressure equipment, making it inconvenient to use;

[0006] Therefore, a minimally invasive dilatation and drainage interventional catheter is designed to optimize the above problems. Utility Model Content

[0007] The main purpose of the utility model is to provide a minimally invasive dilatation drainage interventional catheter, which is characterized by evenly arranging first plastic film flaps in an annular array at a position near the through-port inside the functional placement section, the shape surrounded by the first plastic film flaps is a truncated cone, and the open end of the first plastic film flap faces the through-port, which can prevent large particles of impurities inside the functional placement section from falling when the catheter body is withdrawn from the body, and in addition, second plastic film flaps are evenly arranged in an annular array at the other end of the functional placement section, and the narrow end of the second plastic film flap faces the first plastic film flap, and the inner diameter of the narrow end is the same as the inner diameter of the catheter body, so that when large particles enter the functional placement section, the particles can be blocked, and the catheter body is blocked, which is more practical, and a rotating mechanism composed of a fixing ring, an adjusting ring, a connecting rod and a locking screw is arranged between the delivery tube and the negative pressure catheter, so that the position of the negative pressure catheter can be adjusted when the delivery tube is inconveniently positioned, avoiding the negative pressure pipeline from affecting the use of the interventional catheter, and making it more convenient to use.

[0008] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0009] A minimally invasive dilatation drainage interventional catheter comprises a catheter body, a delivery tube located at the top end of the catheter body and fixedly connected to the catheter body, an expansion section installed at the bottom end of the catheter body and in a truncated cone shape, and a functional placement section fixed at the bottom end of the expansion section and having an inner diameter larger than the catheter body, a first plastic film flap is evenly arranged along the circumferential direction at one end of the inner side of the functional placement section away from the expansion section, and one end of the first plastic film flap away from the inner wall of the functional placement section is inclined toward the expansion section, a second plastic film flap is evenly fixed along the circumferential direction at one end of the inner side of the functional placement section close to the expansion section, and one end of the second plastic film flap away from the inner wall of the functional placement section is inclined toward the first plastic film flap, a plurality of groups of second plastic film flaps are surrounded by a truncated cone shape, and the inner diameter of the narrow end between the second plastic film flaps is the same as the inner diameter of the catheter body, a negative pressure catheter is installed on the side of the delivery tube, and a rotating mechanism for adjusting the angle of the negative pressure catheter is arranged between the catheter body and the negative pressure catheter.

[0010] Preferably: hand-holding plates are symmetrically arranged on both sides of the top of the conveying pipe, and anti-slip strips are arranged on the outer sides of the hand-holding plates.

[0011] Preferably, an annular sheet is fixed to the top of the delivery pipe, and the outer diameter of the annular sheet is larger than the diameter of the delivery pipe, the inner diameter of the annular sheet is the same as the inner diameter of the delivery pipe, and the inner side of the annular sheet is funnel-shaped.

[0012] Preferably, one end of the function placement section away from the expansion section is in an oblique shape, and an arc chamfer is arranged on the outer side of the oblique end of the function placement section.

[0013] Preferably, the narrow end between the first plastic film petals has the same inner diameter as the narrow end between the second plastic film petals, the length of the first plastic film petals is shorter than the length of the second plastic film petals, and the first plastic film petals and the second plastic film petals are both made of polyethylene.

[0014] Preferably: the rotating mechanism includes a fixed ring, an adjusting ring and a connecting rod, the fixed ring is sleeved on the negative pressure tube and fixedly connected to the negative pressure tube, the adjusting ring is rotatably installed on the delivery tube, and a connecting rod is fixed between the outer side of the fixed ring and the adjusting ring.

[0015] Preferably, a locking screw is threadedly mounted on the outer side of the adjusting ring, and an adjusting knob is disposed at the end of the locking screw.

[0016] The beneficial effects of the utility model are:

[0017] The utility model provides a minimally invasive dilatation drainage intervention catheter, wherein first plastic film petals are evenly arranged in an annular array at a position near the through-port inside the functional placement section, the shape surrounded by the first plastic film petals is a truncated cone, and the open end of the first plastic film petal faces the through-port, which can prevent large particles of impurities inside the functional placement section from falling when the catheter body is withdrawn from the body, and second plastic film petals are evenly arranged in an annular array at the other end of the functional placement section, and the narrow end of the second plastic film petal faces the first plastic film petal, and the inner diameter of the narrow end is the same as the inner diameter of the catheter body, so that when large particles enter the functional placement section, the particles can be blocked, and the catheter body is prevented from being blocked, which is more practical;

[0018] By setting a rotating mechanism consisting of a fixing ring, an adjusting ring, a connecting rod and a locking screw between the delivery tube and the negative pressure catheter, the position of the negative pressure catheter can be adjusted when the position of the delivery tube is inconvenient, avoiding the negative pressure pipeline from affecting the use of the interventional catheter, making it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front cross-sectional view of the utility model;

[0020] Figure 2 For the utility model Figure 1 A magnified view of the structure at center;

[0021] Figure 3 It is a cross-sectional view of the functional placement section of the utility model.

[0022] In the figure: 1. catheter body; 2. delivery tube; 3. hand-held plate; 4. negative pressure catheter; 5. rotation mechanism; 6. expansion section; 7. functional placement section; 8. first plastic film flap; 9. second plastic film flap; 10. fixing ring; 11. adjustment ring; 12. connecting rod; 13. locking screw. DETAILED DESCRIPTION

[0023] In order to make the technical solution of the utility model more clear and specific to those skilled in the art, the utility model is further described in detail below in conjunction with embodiments and drawings, but the implementation methods of the utility model are not limited thereto.

[0024] like Figure 1-Figure 3As shown, the present embodiment provides a minimally invasive dilatation drainage interventional catheter, comprising a catheter body 1, a delivery tube 2 located at the top of the catheter body 1 and fixedly connected to the catheter body 1, an expansion section 6 installed at the bottom end of the catheter body 1 and in a truncated cone shape, and a functional placement section 7 fixed at the bottom end of the expansion section 6 and having an inner diameter larger than that of the catheter body 1, a first plastic film flap 8 is evenly arranged along the circumferential direction at one end of the inner side of the functional placement section 7 away from the expansion section 6, and one end of the first plastic film flap 8 away from the inner wall of the functional placement section 7 is inclined toward the expansion section 6, a second plastic film flap 9 is evenly fixed along the circumferential direction at one end of the inner side of the functional placement section 7 close to the expansion section 6, and one end of the second plastic film flap 9 away from the inner wall of the functional placement section 7 is inclined toward the first plastic film flap 8, a plurality of groups of second plastic film flaps 9 are surrounded by a truncated cone shape, and the inner diameter of the narrow end between the second plastic film flaps 9 is the same as the inner diameter of the catheter body 1, a negative pressure catheter 4 is installed on the side of the delivery tube 2, and a rotating mechanism 5 for adjusting the angle of the negative pressure catheter 4 is arranged between the catheter body 1 and the negative pressure catheter 4.

[0025] The overall working principle is: when using the device to guide out the particles in the body, the catheter body 1 is transported to the target, the stones in the target are broken up by ultrasound, and then the input tube of the negative pressure machine is connected to the negative pressure catheter 4, and the negative pressure machine is started to absorb the particles. Small particles are directly sucked out, and slightly larger particles are sucked into the functional placement section 7. When large particles are sucked in, the first plastic film flap 8 will be squeezed at any time, and the second plastic film flap 9 will be used to block the particles to avoid clogging of the catheter body 1. When the catheter body 1 is pulled out, the first plastic film flap 8 in the functional placement section 7 can play a blocking role to prevent particles from falling.

[0026] In this embodiment, the top of the delivery tube 2 is symmetrically provided with a hand-held plate 3 on both sides, and the outer sides of the hand-held plate 3 are provided with an anti-slip strip.

[0027] Local working principle: During the process of inserting the catheter body 1, the fingers pinch the hand-held plate 3 to facilitate the insertion operation.

[0028] In this embodiment, an annular sheet is fixed to the top of the delivery tube 2, and the outer diameter of the annular sheet is larger than the diameter of the delivery tube 2, the inner diameter of the annular sheet is the same as the inner diameter of the delivery tube 2, and the inner side of the annular sheet is funnel-shaped.

[0029] Local working principle: When the guide wire is inserted, due to the funnel-shaped setting on the inner side of the annular piece at the end of the delivery tube 2, the guide wire can be quickly located and inserted more quickly and conveniently.

[0030] In this embodiment, one end of the function placement section 7 away from the expansion section 6 is in an oblique shape, and an arc chamfer is provided on the outer side of the oblique end of the function placement section 7 .

[0031] Local working principle: The arc-shaped chamfer design at the oblique mouth of the functional placement section 7 can avoid causing secondary trauma to the patient and is more practical.

[0032] In this embodiment, the narrow end between the first plastic film petals 8 and the narrow end between the second plastic film petals 9 have the same inner diameter, and the length of the first plastic film petal 8 is smaller than that of the second plastic film petal 9. Both the first plastic film petal 8 and the second plastic film petal 9 are made of polyethylene.

[0033] Local working principle: After the large particles are sucked into the functional placement section 7, the strip-shaped second plastic film flap 9 has a larger length, so it will have a good anti-blocking effect. When the shorter first plastic film flap 8 is pulled out of the catheter body 1, the ends will be close to each other for a better blocking effect.

[0034] In this embodiment, the rotating mechanism 5 includes a fixed ring 10, an adjusting ring 11 and a connecting rod 12. The fixed ring 10 is sleeved on the negative pressure tube 4 and fixedly connected to the negative pressure tube 4. The adjusting ring 11 is rotatably installed on the conveying pipe 2. A connecting rod 12 is fixed between the outer side of the fixed ring 10 and the adjusting ring 11.

[0035] Local working principle: When connecting the negative pressure catheter 4 to the negative pressure machine, rotate the adjustment ring 11, drive the fixed ring 10 to rotate around the delivery tube 2 through the connecting rod 12, and adjust the negative pressure catheter 4 to a suitable position to avoid affecting the use of the delivery tube 2.

[0036] In this embodiment, a locking screw 13 is threadedly mounted on the outer side of the adjusting ring 11 , and an adjusting knob is disposed at the end of the locking screw 13 .

[0037] Partial working principle: After the position adjustment of the adjusting ring 11 is completed, the adjusting knob is rotated to make the end of the locking screw 13 contact with the delivery tube 2 to stabilize the position of the adjusting ring 11.

[0038] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present invention according to the technical solution and concept of the present invention, which fall within the protection scope of the present invention.

Claims

1. A minimally invasive dilatation and drainage interventional catheter, comprising a catheter body (1), a delivery tube (2) located at the top of the catheter body (1) and fixedly connected to the catheter body (1), a truncated cone-shaped expansion section (6) installed at the bottom of the catheter body (1), and a functional placement section (7) fixed at the bottom of the expansion section (6) and having an inner diameter larger than that of the catheter body (1), characterized in that: A first plastic film flap (8) is evenly arranged along the circumferential direction at one end of the inner side of the function placement section (7) away from the expansion section (6), and one end of the first plastic film flap (8) away from the inner wall of the function placement section (7) is inclined toward the expansion section (6). A second plastic film flap (9) is evenly fixed along the circumferential direction at one end of the inner side of the function placement section (7) close to the expansion section (6), and one end of the second plastic film flap (9) away from the inner wall of the function placement section (7) is inclined toward the first plastic film flap (8). Multiple groups of second plastic film flaps (9) form a truncated cone shape, and the inner diameter of the narrow end between the second plastic film flaps (9) is the same as the inner diameter of the catheter body (1). A negative pressure catheter (4) is installed on the side of the delivery tube (2), and a rotating mechanism (5) for adjusting the angle of the negative pressure catheter (4) is arranged between the catheter body (1) and the negative pressure catheter (4).

2. A minimally invasive dilatation and drainage interventional catheter according to claim 1, characterized in that: Hand-held plates (3) are symmetrically arranged on both sides of the top of the conveying pipe (2), and anti-slip strips are arranged on the outer sides of the hand-held plates (3).

3. A minimally invasive dilatation and drainage interventional catheter according to claim 1 or 2, characterized in that: An annular sheet is fixed to the top end of the delivery pipe (2), the outer diameter of the annular sheet is larger than the diameter of the delivery pipe (2), the inner diameter of the annular sheet is the same as the inner diameter of the delivery pipe (2), and the inner side of the annular sheet is funnel-shaped.

4. A minimally invasive dilatation and drainage interventional catheter according to claim 3, characterized in that: One end of the function placement section (7) away from the expansion section (6) is in an oblique shape, and an arc chamfer is provided on the outer side of the oblique end of the function placement section (7).

5. A minimally invasive dilatation and drainage interventional catheter according to claim 1 or 4, characterized in that: The narrow end between the first plastic film petals (8) and the narrow end between the second plastic film petals (9) have the same inner diameter, and the length of the first plastic film petals (8) is shorter than the length of the second plastic film petals (9). Both the first plastic film petals (8) and the second plastic film petals (9) are made of polyethylene.

6. The minimally invasive dilatation and drainage interventional catheter according to claim 5, characterized in that: The rotating mechanism (5) comprises a fixed ring (10), an adjusting ring (11) and a connecting rod (12); the fixed ring (10) is sleeved on the negative pressure conduit (4) and fixedly connected to the negative pressure conduit (4); the adjusting ring (11) is rotatably mounted on the delivery pipe (2); and a connecting rod (12) is fixed between the outer side of the fixed ring (10) and the adjusting ring (11).

7. The minimally invasive dilatation and drainage interventional catheter according to claim 6, characterized in that: A locking screw (13) is threadedly mounted on the outer side of the adjusting ring (11), and an adjusting knob is disposed at the end of the locking screw (13).

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