CN211357052U - Cuff ring cutter and dialysis system - Google Patents

Abstract

The utility model provides a Cuff ring cutter and a dialysis system, which relate to the technical field of medical instruments. It includes a conveying part and a hand-held part, the conveying part includes a cutting device, a push-pull device and a hollow kit, one end of the cutting device is connected with one end of the push-pull device, the push-pull device and the cutting device are both arranged in the hollow kit, and the push-pull device can push and pull the cutting device. The cutting part is exposed to the hollow sleeve or retracted into the hollow sleeve; the end of the push-pull device away from the cutting device extends to the hand-held part; The Cuff ring cutter of the utility model can realize the self-adaptive expansion and contraction of the cutting device through the driving part and the hollow sleeve, and can be used to solve the technical problem of difficult long-term dialysis tube replacement. The use of the Cuff ring cutter does not require incision of the skin, which can minimize the traumatic surface, which brings good news for the painless replacement of the dialysis tube for hemodialysis patients.

Description

A Cuff Ring Cutter and Dialysis System

technical field

The utility model relates to the technical field of medical devices, in particular to a Cuff ring cutter and a dialysis system.

Background technique

Vascular access is a necessary condition for the establishment of cardiopulmonary bypass in maintenance hemodialysis (hemodialysis) patients, and a smooth hemodialysis access plays a crucial role in prolonging the survival time and quality of uremic patients. Although the establishment of arteriovenous fistulas is widely used, there are still many patients with poor limb vascular conditions and poor cardiac function who choose long-term dialysis catheter placement. The average use time of long-term dialysis tubes is 6 months, but due to economic conditions and other reasons, the use of long-term dialysis tubes has been significantly prolonged, and some clinical patients have even been placed for more than 3 years.

Cuff ring (fiber polyester ring) is an important structure of long-term dialysis tube, the existence of Cuff ring can play an important role in fixing long-term dialysis tube and preventing bacterial infection. In addition, the long-term existence of the Cuff ring makes the granulation tissue integrated with it, and the combination is firm, making it difficult to replace the long-term dialysis tube (a lot of time-consuming, skin incision, heavy bleeding, pain, and long-term dialysis tube breakage when pulled out, etc. ), therefore, minimally invasive and effective supporting cutting instruments are in urgent need of research and development.

In view of this, the present utility model is proposed.

Utility model content

The purpose of this utility model is to provide a Cuff ring cutter and a dialysis system to solve the above-mentioned technical problems.

The utility model is realized in this way:

A Cuff ring cutter comprises a conveying part and a hand-held part, the conveying part comprises a cutting device, a push-pull device and a hollow sleeve, one end of the cutting device is connected with one end of the push-pull device, and both the push-pull device and the cutting device are arranged in the hollow sleeve, And the push-pull device can push and pull the cutting part of the cutting device to expose the hollow sleeve or shrink into the hollow sleeve; the end of the push-pull device away from the cutting device extends to the hand-held part;

The Cuff ring cutter is equipped with a conveying part and a hand-held part that can push the cutting part. The driving part of the hand-held part drives the push-pull device to move in the axial direction of the hollow sleeve, and finally pushes the cutting part of the cutting device to expose the hollow sleeve. The granulation tissue separates the Cuff ring from the granulation tissue, so that the long-term dialysis tube can be removed smoothly, which reduces the difficulty of replacing the long-term dialysis tube, and also avoids the occurrence of heavy bleeding and pain when replacing the long-term dialysis tube. After the cutting is completed, the cutting device is retracted to the conveying section by pushing and pulling the drive, and the Cuff ring cutter is moved out. This facilitates the reuse of the Cuff Ring Cutter.

Further, when using, first disinfect and lay out sheets near the long-term dialysis tube, so as to ensure a sterile environment during the operation; then use anesthesia to locally anesthetize the subcutaneous tunnel of the long-term dialysis tube, and inject iopamidol into the long-term dialysis tube to make the long-term dialysis tube. The whole process of the dialysis tube is visualized to determine whether there is a wall thrombus at the head end of the long-term dialysis tube. Gently pull the long-term dialysis tube outward to judge the degree of adhesion between the Cuff ring and the surrounding tissue; when the two are closely adhered, the Cuff ring cutter is transported to the subcutaneous tunnel along the 14.5F outer diameter of the long-term dialysis tube, until there is resistance. Push the push button forward to expose the cutting part of the cutting device and cut the surrounding tissue. After the cutting is completed, gently pull back the long-term dialysis tube to expose the Cuff ring to the skin, and proceed to the next step.

The hollow set provided by the utility model has a hollow semi-ring structure, in which a cutting device and a push-pull device can be arranged, and when necessary, the cutting device can be pushed out to cut the Cuff ring and surrounding tissue, which is simple to operate and less traumatic.

In a preferred embodiment of the application of the present invention, one end of the hollow sleeve close to the cutting device is provided with a telescopic hole for the cutting part of the cutting device to expose the hollow sleeve or shrink into the hollow sleeve. The size of the telescopic hole is slightly larger than the size of the cross section of the cutting part.

In a preferred embodiment of the application of the present invention, the above-mentioned cutting device includes a driving member including a push button and a connecting member. device is connected. The push button and the connector are bolted, welded, and the clamp is fixedly connected or bonded. The connection between the push button and the connector can be adjusted as required.

In other embodiments, the driving member may also be integrally formed, and by pushing and pulling the driving member, the cutting device can be exposed to the telescopic hole or contracted to the telescopic hole. The installation position of the driving member can be adjusted as required, and can be arranged at the end of the hand-held portion away from the cutting device.

In a preferred embodiment of the present invention, the above-mentioned cutting device includes a cutting part and a cutting part fixing part, the end face of the cutting part opposite to the blade is hinged to the cutting part fixing part, and the cutting part fixing part is connected with the push-pull device. The shape of the longitudinal section of the cut portion is a semicircular ring. When in use, the push-pull device transmits power to the cutting part fixing part of the cutting device, the forward displacement of the cutting part fixing part drives the cutting part to move forward, the cutting part exposes the hollow sleeve along the telescopic hole, and the cutting part abuts against the Cuff ring, so that the cutting part The cutting part is deflected at the hinge joint with the cutting part fixing part, and a semi-circular cutting part is provided, so that the deflected cutting part can cut the granulation tissue of the peripheral wall of the Cuff ring, and the wound surface is small. After the cut is completed, push the push button to retract the cut part into the hollow kit.

In a preferred embodiment of the application of the present invention, the above-mentioned hand-held portion has a column or table structure. The hand-held part is used to hold the Cuff ring cutter outside the body to carry out the pushing operation of the cutting device. In this embodiment, the handle portion is cylindrical.

In a preferred embodiment of the present invention, the above-mentioned push-pull device is a pull rod, one end of the pull rod is connected with the cutting device, and the other end of the pull rod extends into the hand-held portion and is connected with the driving member. The setting of the pull rod can realize the transmission of the thrust of the driving element to the cutting device, so as to complete the subsequent granulation tissue cutting and the retraction of the cutting device.

In a preferred embodiment of the application of the present invention, the shape of the cross-section of the above-mentioned hollow sleeve is a semi-circular ring. The shape of the hollow kit is adjusted as needed.

In a preferred embodiment of the present invention, the inner diameter of the hollow sleeve is 14F, and the outer diameter of the hollow sleeve is 14.5F.

The product matches the outer diameter of the long-term dialysis tubing and can be delivered through the original subcutaneous tunnel of the dialysis tubing without the need to cut the skin and minimize trauma.

A dialysis system includes a Cuff ring cutter and a long-term dialysis tubing. By setting the matching Cuff ring cutter, it is beneficial to replace the long-term dialysis tube more conveniently, which brings good news for the painless replacement of the dialysis tube for hemodialysis patients.

Compared with the prior art, the beneficial effects of the present utility model are:

The Cuff ring cutter of the utility model can realize the self-adaptive expansion and contraction of the cutting device through the driving part and the hollow sleeve, and can be used to solve the technical problem of difficult long-term dialysis tube replacement. The use of the Cuff ring cutter does not need to cut the skin, which can minimize the trauma surface, which brings good news for the painless replacement of the dialysis tube for hemodialysis patients. In addition, the Cuff ring cutter is simple to manufacture and inexpensive. In addition, a dialysis system is provided, which can adaptively set a matching Cuff ring cutter for long-term dialysis tubes of different styles and sizes, which is beneficial to the popularization and application of the Cuff ring cutter.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a longitudinal sectional view of the Cuff ring cutter 600 when it is in a cutting state;

FIG. 2 is a side view of the Cuff ring cutter 600 in the cutting state;

3 is a longitudinal cross-sectional view of the Cuff ring cutter 600 in a retracted state;

Figure 4 is a side view of the Cuff ring cutter 600 in a retracted state;

Fig. 5 is the partial three-dimensional structure diagram of the Cuff ring cutter in the cutting state;

FIG. 6 is a perspective structural view of the cutting device in the first embodiment when it is in a cutting state.

Icon: 100-hand-held part; 110-connector; 120-push button; 130-installation hole; 200-hollow kit; 210-push-pull device; 220-expandable hole; - Cutting Section; 600-Cuff Ring Cutter.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described above are a part of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner" and "outer" , "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in use, only for the convenience of The present invention is described and simplified without indicating or implying that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhanging" etc. do not imply that a component is required to be absolutely horizontal or overhang, but rather may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arrangement", "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be a fixed connection It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example 1

This embodiment provides a Cuff ring cutter 600, as shown in FIG. 1, which includes a hand-held part 100 and a conveying part, wherein the conveying part includes a cutting device 300, a push-pull device 210 and a hollow sleeve 200, one end of the cutting device 300 is connected to the push-pull part One end of the device 210 is connected, and the push-pull device 210 can drive the cutting device 300 to move. Further, the cutting device 300 and the push-pull device 210 are both disposed in the hollow sleeve 200 . The cutting device 300 is pushed by the push-pull device 210 to move along the axial direction of the hollow sleeve 200 , so that the cutting part 320 of the cutting device 300 is exposed to the hollow sleeve 200 or retracted into the hollow sleeve 200 along the telescopic hole 220 of the hollow sleeve 200 . FIG. 1 is a longitudinal cross-sectional view of the Cuff ring cutter 600 in a cutting state. Referring to FIG. 1 , this embodiment provides a push-pull device 210 driven by the push button 120 and the connector 110 to push the cutting portion 320 of the cutting device 300 out of the hollow sleeve 200 along the telescopic hole 220 . In this embodiment, the driving member includes a push button 120 and a connecting member 110 .

Specifically, a mounting hole 130 is formed on the outer peripheral wall of the hand-held portion 100 , and a push button 120 is installed in the mounting hole 130 . In this embodiment, the bottom end of the push button 120 is bonded and fixed to the top end of the connecting member 110 . The shape of the push button 120 is a rectangular parallelepiped. In other embodiments, the shape of the push button 120 may also be a pyramid, a prism, a sphere, or a pyramid.

A movable hole for the left and right displacement of the connector 110 is opened at one end of the hollow sleeve 200 close to the hand-held portion 100 . In this embodiment, the movable hole of the hollow sleeve 200 is a rectangle. The width of the movable hole is slightly larger than the width of the connecting piece 110, and the length of the movable hole is 5 mm. In other embodiments, the movable hole of the hollow sleeve 200 may be set according to the shape of the cross section of the connecting piece 110 .

Further, in order to match with the long-term dialysis tube as much as possible, the inner diameter of the hollow sleeve 200 is 14F, the outer diameter is 14.5F, and the length of the hollow sleeve 200 is 5-7cm. The diameter or side length of the end of the hand-held portion 100 away from the delivery portion is 3 cm, and the length of the Cuff ring cutter is 10 cm. This arrangement is beneficial for the Cuff ring cutter to cut the Cuff ring and the granulation tissue of the long-term dialysis tube in the subcutaneous tunnel with minimal trauma, thereby realizing the replacement of the long-term dialysis tube.

Further, the cutting device 300 and the push-pull device 210 are disposed in the hollow sleeve 200 , and one end of the push-pull device 210 away from the cutting device 300 extends into the hand-held portion 100 .

6 , the cutting device 300 further includes a cutting portion 320 and a cutting portion fixing member 310. The end surface of the cutting portion opposite to the blade is hinged to the cutting portion fixing member, and the cutting portion fixing member is connected to the push-pull device. In this embodiment, the cutting part fixing member 310 and the push-pull device 210 are connected by bolts. In other embodiments, the connection manner of the cutting part fixing member 310 and the push-pull device 210 can be adjusted as required.

Further, the shape of the longitudinal section of the cutting portion 320 is a semi-circular ring, as shown in FIG. 1 and FIG. 2 . When in use, the push-pull device 210 transmits power to the cutting part fixing part 310 of the cutting device 300 , the cutting part fixing part 310 moves forward to drive the cutting part 320 to move forward, the cutting part 320 exposes the hollow sleeve 200 from the telescopic hole 220 , and the cutting part 320 The front end is in contact with the Cuff ring, so that the cutting part 320 is deflected at the hinge joint between the cutting part 320 and the cutting part fixing member 310, and a semi-circular-shaped cutting part 320 is provided, so that the deflected cutting part 320 can align the peripheral wall of the Cuff ring. The granulation tissue is cut and the wound surface is small. FIG. 5 is a partial three-dimensional structural view of the Cuff ring cutter in the cutting state.

After the cutting is completed, push the push button 120 to recover the cutting part 320 into the hollow sleeve 200 . 3 and 4 are structural diagrams of the Cuff ring cutter when the cutting portion 320 is retracted. After the cutting is completed, the replacement of the long-term dialysis tube can be easily realized.

Example 2

This embodiment provides a clinical use method of the Cuff ring cutter 600, which specifically includes the following steps:

(1) Disinfect and lay out sheets near the long-term dialysis tube; this can maintain a sterile environment during surgery.

(2) Use 2% lidocaine to local anesthetize the long-term dialysis tube subcutaneous tunnel, which can relieve the pain of the patient.

(3) Inject iopamidol into the long-term dialysis tube to visualize the whole process of the long-term dialysis tube, and confirm whether there is a wall thrombus at the head of the long-term dialysis tube. If there is no thrombus, proceed to the next step; if there is a thrombus, use urokinase first. Proceed to the next step after thrombolysis.

(4) Gently pull the long-term dialysis tube outward to judge the degree of adhesion between the Cuff ring and the surrounding tissue; when the two are closely adhered, transport the Cuff ring cutter to the subcutaneous tunnel along the 14.5F outer diameter of the long-term dialysis tube. Push the push button forward to expose the incision and cut the surrounding tissue. After the incision is completed, gently pull back the long-term dialysis tube to expose the Cuff ring to the skin, and proceed to the next step.

The utility model also provides a dialysis system, which includes a Cuff ring cutter 600 and a long-term dialysis tube. By setting the matching Cuff ring cutter, the long-term dialysis tube can be replaced more conveniently, and the dialysis tube can be replaced painlessly for hemodialysis patients. Tube brings the gospel.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A Cuff ring cutter, characterized in that it comprises a conveying part and a hand-held part, the conveying part comprises a cutting device, a push-pull device and a hollow sleeve, one end of the cutting device is connected with one end of the push-pull device, Both the push-pull device and the cutting device are arranged in the hollow sleeve, and the push-pull device can push and pull the cutting part of the cutting device to expose the hollow sleeve or shrink into the hollow sleeve; the push-pull device is far away from the cutting One end of the device extends to the hand-held part; the hand-held part is provided with a driving member that drives the push-pull device to move back and forth in the axial direction of the hollow sleeve. 2 . The Cuff ring cutter according to claim 1 , wherein an end of the hollow sleeve close to the cutting device is provided with a telescopic hole for exposing the cutting part of the cutting device to the hollow sleeve or shrinking into the hollow sleeve. 3 . 3 . The Cuff ring cutter according to claim 1 , wherein the driving member comprises a push button and a connecting member, the push button is arranged in the installation hole of the outer peripheral wall of the hand-held portion, and the push button 3 . The push-pull device inserted into the hand-held part is connected by a connecting piece. 4. The Cuff ring cutter according to claim 1, wherein the cutting device comprises a cutting portion and a cutting portion fixing member, and the end face of the cutting portion opposite to the blade is hinged to the cutting portion fixing member, so The cutting part fixing member is connected with the push-pull device. 5 . The Cuff ring cutter according to claim 4 , wherein the longitudinal section of the cutting portion has a semicircular shape. 6 . 6 . The Cuff ring cutter according to claim 1 , wherein the hand-held portion has a column or table structure. 7 . 7 . The Cuff ring cutter according to claim 1 , wherein the push-pull device is a pull rod, one end of the pull rod is connected to the cutting device, and the other end of the pull rod extends into the hand-held portion and is connected with the the driver connection. 8 . The Cuff ring cutter according to claim 1 , wherein the shape of the cross-section of the hollow sleeve is a semi-circular ring. 9 . 9. The Cuff ring cutter of claim 8, wherein the inner diameter of the hollow sleeve is 14F, and the outer diameter of the hollow sleeve is 14.5F. 10. A dialysis system, characterized in that it comprises a Cuff ring cutter according to any one of claims 1-9 and a long-term dialysis tube.

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