Catheter sleeve device and method

Abstract

The present invention relates to the field of medical device technology, and specifically to a catheter sleeve device and method. A catheter sleeve device comprises: a fixing mechanism having a first channel and a second channel that are interconnected; an air supply mechanism that is connected to the second channel; a core shaft that is arranged through the first channel, the core shaft being used to install and support the catheter and sleeve to be sleeved, the sleeve and part of the catheter being arranged in the first channel, the sleeve having a first state in which the lumen volume of the sleeve increases to allow the catheter to pass through when the air supply mechanism inflates the first channel through the second channel and one end of the first channel is closed, and a second state in which the lumen volume of the sleeve shrinks to the initial state to be fastened to the catheter when the air supply mechanism stops inflating and the closed end of the first channel is opened. The present invention solves the problem of low efficiency when the inner tube and outer tube of the catheter are sleeved, thereby providing a catheter sleeve device and method.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a catheter sleeve device and method. Background Art

[0002] During the production of medical device catheters, an outer tube is placed over the inner tube. This process is typically accomplished by blowing air into the inner and outer tubes with an air needle, increasing the gap between them and allowing them to fit. However, if the outer tube has a high viscosity, the unidirectional thrust from the air needle is insufficient to increase the gap, preventing the inner tube from moving freely within the outer tube, resulting in reduced operator efficiency during installation. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect of low efficiency when the inner tube and the outer tube of the catheter are connected in the prior art, thereby providing a catheter connection device and method.

[0004] In order to solve the above problems, the present invention provides a catheter sleeve device, comprising:

[0005] A fixing mechanism having a first channel and a second channel communicating with each other;

[0006] an air supply mechanism, communicating with the second channel;

[0007] A core shaft is arranged through the first channel, and the core shaft is used to install and support the catheter and sleeve to be sleeved. The sleeve and part of the catheter are arranged in the first channel. The sleeve has a first state in which the lumen volume of the sleeve increases to allow the catheter to pass through when the air supply mechanism inflates the first channel through the second channel and one end of the first channel is closed, and a second state in which the lumen volume of the sleeve shrinks to the initial state to be fastened to the catheter when the air supply mechanism stops inflating and the closed end of the first channel is opened.

[0008] Optionally, the sleeve is located at the other end opposite to the closed end of the first channel, and has a length smaller than that of the first channel.

[0009] Optionally, the fixing mechanism is a three-way valve.

[0010] Optionally, a first clamping mechanism and a second clamping mechanism are further included for fixing the two ends of the core shaft, and the first clamping mechanism and the second clamping mechanism both include a clamping claw and a sliding seat rotatably connected to the clamping claw.

[0011] Optionally, a mounting seat is further included, and the fixing mechanism is arranged on the mounting seat.

[0012] Optionally, a slide rail is further included, and the slide seat and the mounting seat are both slidably connected to the slide rail.

[0013] Optionally, two ends of the first channel are rotatably connected with a first tube body and a second tube body respectively, and the inner diameters of the first tube body and the second tube body are larger than the outer diameter of the sleeve when it is in the first state.

[0014] A catheter sleeve method is also provided, comprising:

[0015] First, the sleeve and the catheter are both placed on the core shaft, and then the part of the core shaft where the sleeve is placed is passed through the first channel of the fixing mechanism. At this time, the sleeve and part of the catheter are both located in the first channel, one end of the first channel is blocked, and air is inflated into the first channel through the second channel. When the lumen volume of the sleeve increases to allow the catheter to pass through, the catheter is moved until the sleeve reaches the predetermined position, the inflation is stopped, and the blocked end of the first channel is opened.

[0016] Optionally, the method further includes the step of clamping and fixing the two ends of the core shaft respectively during the sleeve connection.

[0017] Optionally, after stopping inflation and opening the blocked end of the first channel, the catheter is rotated to perform the cutting step.

[0018] The technical solution of the present invention has the following advantages:

[0019] 1. The catheter sleeve device provided by the present invention includes: a fixing mechanism having a first channel and a second channel connected to each other; an air supply mechanism connected to the second channel; a core shaft is arranged through the first channel, the core shaft is used to install and support the catheter and sleeve to be sleeved, the sleeve and part of the catheter are arranged in the first channel, the sleeve has a first state in which the volume of the sleeve cavity increases to allow the catheter to pass through when the air supply mechanism supplies air to the first channel through the second channel and one end of the first channel is closed, and a second state in which the volume of the sleeve cavity shrinks to the initial state to be fastened to the catheter when the air supply mechanism stops inflating and the closed end of the first channel is opened. When the gas supply mechanism supplies gas to the first channel through the second channel, one end of the first channel is closed and the sleeve is in the first state, gas can only flow out from the other end of the first channel, surrounding the sleeve connected to the catheter with airflow, forming a pressure difference between the outer wall of the core shaft and the inner wall of the sleeve, and between the outer wall of the sleeve and the inner wall of the first channel. That is, the pressure between the outer wall of the core shaft and the inner wall of the sleeve is large, and the pressure between the outer wall of the sleeve and the inner wall of the first channel is small, causing the sleeve to expand, allowing the catheter to enter the sleeve and move freely within the sleeve. When the gas supply mechanism stops venting gas to the first channel and the sleeve is in the second state, the pressure difference between the outer wall of the core shaft and the inner wall of the sleeve, and between the outer wall of the sleeve and the inner wall of the first channel disappears, and the sleeve will slowly shrink and then be connected to the catheter, which is convenient for personnel to operate and more efficient than manual installation by operators. In addition, before gas is supplied to the first channel, the partial connection between the catheter and the sleeve serves as a guide for the catheter to be inserted into the sleeve in the first state.

[0020] 2. In the catheter sleeve device provided by the present invention, the sleeve is located at the other end opposite to the closed end of the first channel, and its length is less than the length of the first channel, so that the sleeve is located in the flow direction of the airflow, and its length is less than the length of the first channel so that the gas passes through the inner and outer walls of the sleeve, which is convenient for sleeve connection with the catheter.

[0021] 3. The catheter sleeve device provided by the present invention has a fixing mechanism of a three-way valve to better control the opening and closing of the port, quickly realize the switching between the first state and the second state, and improve production efficiency.

[0022] 4. The catheter sheathing device provided by the present invention also includes a first clamping mechanism and a second clamping mechanism for securing the ends of the mandrel. Each of the first and second clamping mechanisms includes a clamping jaw and a slide slidably connected to the clamping jaw. The fixing mechanism is mounted on a mounting base, and both the slide and mounting base are slidably connected to a slide rail. The clamping jaws of the first and second clamping mechanisms secure the mandrel, and the mounting base and slide are slidably connected to the slide rail to facilitate operator adjustment of the distance between the mandrel, catheter, and cannula according to their lengths, thus facilitating operation.

[0023] 5. The catheter sheathing device provided by the present invention has a first tube body and a second tube body rotatably connected at each end of the first channel. The inner diameters of the first and second tube bodies are larger than the outer diameter of the cannula in the first state. The arrangement of the first and second tube bodies facilitates the connection of longer cannulae and is suitable for adjusting catheters and cannulae of different lengths and diameters.

[0024] 6. The catheter sheathing method provided by the present invention first sheathes the cannula and the sleeve onto the core shaft, then passes the portion of the core shaft sheathed with the sleeve through the first channel of the fixing mechanism, blocks one end of the first channel, and inflates the first channel through the second channel. When the lumen volume of the cannula increases to allow the catheter to pass through, the catheter is moved until the cannula reaches a predetermined position, the inflation is stopped, and the blocked end of the first channel is opened. By inflating the first channel to increase the lumen volume of the cannula, the catheter can move freely within the cannula. When the cannula moves to the predetermined position, the lumen volume of the cannula is reduced after the inflation is stopped, and the cannula and the catheter are successfully sheathed.

[0025] 7. The catheter sleeve method provided by the present invention also includes the step of clamping and fixing the two ends of the core shaft respectively during sleeve connection. The two ends of the core shaft are clamped to fix the core shaft respectively to avoid the catheter from rotating due to the rotation of the core shaft during the sleeve connection process, thereby eliminating the adverse effects on the sleeve connection.

[0026] 8. The catheter sleeve method provided by the present invention stops inflation, opens the blocked end of the first channel, and then rotates the catheter for cutting. After the sleeve is completed, cutting is performed according to production requirements to achieve integrated sleeve connection and cutting of the catheter and sleeve, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic structural diagram of a catheter sheathing device provided in an embodiment of the present invention;

[0029] Figure 2 This is a cross-sectional view of the mounting seat portion of the catheter hub device provided in an embodiment of the present invention.

[0030] Explanation of the accompanying drawings: 1. core shaft; 2. second clamping mechanism; 3. second tube body; 4. fixing mechanism; 5. air supply mechanism; 6. first tube body; 7. conduit; 8. first clamping mechanism; 9. slide rail; 10. mounting seat; 11. sleeve. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0034] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] like Figure 1 - Figure 2 A specific embodiment of the catheter sleeve device shown includes: a slide rail 9, a first clamping mechanism 8 and a second clamping mechanism 2 relatively arranged at the ends of the slide rail 9, and a mounting seat 10 arranged between the first clamping mechanism 8 and the second clamping mechanism 2. The first clamping mechanism 8, the second clamping mechanism 2 and the mounting seat 10 are all slidably connected to the slide rail 9.

[0036] like Figure 1 As shown, the first clamping mechanism 8 and the second clamping mechanism 2 both include a clamping jaw and a sliding seat, wherein the clamping jaw is provided with a through hole, and the sliding seat is slidably connected to the slide rail 9.

[0037] like Figure 1As shown, a fixing mechanism 4 is provided on the mounting base 10. Specifically, the fixing mechanism 4 is a three-way valve. The three-way valve includes a first channel and a second channel that are interconnected. The first channel is coaxially arranged with the first clamping mechanism 8 and the second clamping mechanism 2. The two ends of the first channel are rotatably connected with the first tube body 6 and the second tube body 3 respectively. Specifically, the first tube body 6 and the second tube body 3 are both acrylic tubes so that the staff can clearly observe the sleeve connection process. The second channel is externally connected to an air supply mechanism 5, specifically, the air supply mechanism 5 is a foot-operated gas valve. As shown Figure 1 、 Figure 2 As shown, the core shaft 1 sequentially passes through the clamping jaws of the first clamping mechanism 8, the first channel, and the clamping jaws of the second clamping mechanism 2. The outer periphery of the core shaft 1 is provided with a catheter 7 and a sleeve 11, wherein the catheter 7 and the sleeve 11 are partially sleeved, and the sleeved portion of the catheter 7 and the sleeve 11 is located in the first tube body 6. Specifically, the sleeve 11 is a silicone hose. The inner diameters of the first tube body 6 and the second tube body 3 are both larger than the tube cavity volume when the sleeve 11 and the catheter 7 are sleeved. Figure 2 This is the state after the catheter 7 and the sleeve 11 are completely sleeved in the first tube body 6.

[0038] A catheter sleeve method comprises the following steps:

[0039] 1) The guide tube 7 and the sleeve 11 are sleeved on the core shaft 1, so that the sleeve 11 and the guide tube 7 are partially sleeved;

[0040] 2) The core shaft 1 passes through the clamping jaws of the first clamping mechanism 8, the first channel, and the clamping jaws of the second clamping mechanism 2 in sequence, and is fixed by the clamping jaws of the first clamping mechanism 8 and the second clamping mechanism 2;

[0041] 3) Place the connecting portion of the catheter 7 and the sleeve 11 into the first tube 6;

[0042] 4) Seal the end of the second tube body 3 with a rubber plug, and step on the foot-operated gas valve to fill gas from the second channel into the first channel. This creates a pressure difference between the outer wall of the catheter 7 and the inner wall of the sleeve 11, and between the outer wall of the sleeve 11 and the inner wall of the first tube body 6, thereby increasing the lumen volume of the sleeve 11. The catheter 7 moves to the sleeve position within the sleeve 11, stops filling, and opens the blocked end of the second tube;

[0043] 5) Rotate the clamping claw of the first clamping mechanism 8 and place the blade on the catheter 7 at the position to be peeled to peel out a smooth end surface.

[0044] The catheter sleeve device provided by the present invention has a relatively simple process, and the sleeve connection process and the tube cutting process are concentrated in the same device, which is convenient for workers to quickly sleeve and cut the tube, thereby realizing the integrated sleeve connection and cutting of the catheter 7.

[0045] As an alternative embodiment, the catheter 7 and the sleeve 11 sleeved on the core shaft 1 can be brought close to each other but separated before sleeve connection, and then the sleeve 11 can be placed in the first tube body 6. After the gas valve is pressed to fill the first channel with air, the catheter 7 can be moved to the sleeve 11 for sleeve connection.

[0046] As an alternative embodiment, the fixing mechanism 4 may also be a gas tee pipe.

[0047] As an alternative embodiment, the air supply mechanism 5 may also be a pneumatic valve, an electric valve or other valve forms.

[0048] As an alternative embodiment, the first tube body 6 and the second tube body 3 may also be transparent tubes made of other materials such as plastic transparent tubes.

[0049] As an alternative embodiment, the connecting portion of the catheter 7 and the sleeve 11 may also be located in the second tubular body 3 .

[0050] As an alternative embodiment, the sleeve 11 may also be other types of hoses such as Pebax2533, Pebax3533d, etc.

[0051] As an alternative embodiment, the port of the second tube 3 can also be blocked by hands, plastic blocks or other objects.

[0052] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications derived therefrom remain within the scope of protection of the present invention.

Claims

1. A catheter sleeve device, characterized in that: include: A fixing mechanism (4) having a first channel and a second channel communicating with each other; an air supply mechanism (5) communicating with the second channel; A core shaft (1) is provided through the first channel, the core shaft (1) is used to install and support the catheter (7) and the sleeve (11) to be sleeved, the sleeve (11) and a portion of the catheter (7) are provided in the first channel, the sleeve (11) has a first state in which the lumen volume of the sleeve (11) increases to allow the catheter (7) to pass through when the air supply mechanism (5) inflates the first channel through the second channel and one end of the first channel is closed, and a second state in which the lumen volume of the sleeve (11) decreases to an initial state in which the sleeve is fastened to the catheter (7) when the air supply mechanism (5) stops inflating and the closed end of the first channel is opened; The sleeve (11) is located at the other end opposite to the closed end of the first channel, and has a length less than that of the first channel; The fixing mechanism (4) is a three-way valve; It also includes a first clamping mechanism (8) and a second clamping mechanism (2) for fixing the two ends of the core shaft (1), and the first clamping mechanism (8) and the second clamping mechanism (2) both include a clamping jaw and a slide seat rotatably connected to the clamping jaw.

2. The catheter sleeve device according to claim 1, characterized in that It also includes a mounting seat (10), and the fixing mechanism (4) is arranged on the mounting seat (10).

3. The catheter sleeve device according to claim 2, characterized in that: It also includes a slide rail (9), and the slide seat and the mounting seat (10) are both slidably connected to the slide rail (9).

4. The catheter hub device according to claim 1, wherein: The two ends of the first channel are rotatably connected to a first tube body (6) and a second tube body (3), respectively. The inner diameters of the first tube body (6) and the second tube body (3) are larger than the outer diameter of the sleeve (11) when it is in the first state.

5. A catheter sleeve method, characterized in that: The following steps are involved: First, the sleeve (11) and the catheter (7) are both sleeved on the core shaft (1), and then the portion of the core shaft (1) sleeved with the sleeve (11) is passed through the first channel of the fixing mechanism (4). At this time, the sleeve (11) and part of the catheter (7) are both located in the first channel, one end of the first channel is blocked, and air is inflated into the first channel through the second channel. When the lumen volume of the sleeve (11) increases to allow the catheter (7) to pass through, the catheter (7) is moved until the sleeve (11) reaches a predetermined position, the inflation is stopped, and the blocked end of the first channel is opened.

6. The catheter sleeve method according to claim 5, characterized in that: The method also includes the steps of respectively clamping and fixing the two ends of the core shaft (1) during the sleeve connection.

7. The catheter sleeve method according to claim 5 or 6, characterized in that: After stopping the inflation and opening the blocked end of the first channel, the catheter (7) is rotated to perform the cutting step.

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