A central venous catheter that is easy to clean

Abstract

The present invention discloses a central venous catheter that is easy to clean, and relates to the technical field of central venous catheters. The present invention specifically includes a tube body, at least three pressure sensing units, a positioning cable, a support structure and a display. Each pressure sensing unit is arranged along the axis direction of the tube body, and each pressure sensing unit is connected to the positioning cable respectively. The data connector is connected to the positioning cable, and the data connector is detachably electrically connected to the display. The display is used to display the pressure value detected by each pressure sensor. The internal pressure of the tube body can be known by the pressure value detected by each pressure sensing unit, and whether the tube body is leaking can be determined by the change of the pressure value detected by each pressure sensing unit. The present invention can observe the pressure in the tube body through the pressure sensing unit in the tube body, and can also determine whether the tube body is leaking through the pressure values ​​detected by multiple pressure sensing units, so that medical staff can deal with the leakage in the first time.

Description

Technical Field

[0001] The invention relates to the technical field of central venous catheters, and in particular provides a central venous catheter that is easy to clean. Background Art

[0002] Central venous catheters are used to deliver drugs to patients and are long-term pipe devices implanted in patients. Central venous catheters are usually implanted in the patient's hand and then implanted in the body along the arm, neck, and chest. After the central venous catheter delivers drugs, medical staff need to inject saline into the central venous catheter. The injection of saline can flush the residual drugs on the inner wall of the central venous catheter into the patient's blood vessels, preventing the drugs from remaining in the central venous catheter and preventing drug waste.

[0003] However, when injecting saline, medical staff usually hold a syringe to inject. If the saline is injected manually too quickly, it is easy to cause the pressure inside the central venous catheter to be too high, which can cause damage and leakage. The central venous catheter is implanted in the body for a long time, and the saline flow resistance is large. Once the central venous catheter leaks, a large amount of saline will be discharged from the leak, which will not be able to flush out the residual drugs. It will also cause subsequent drugs to be discharged from the leak, making it impossible for the drugs to be injected into the lesion. Therefore, preventing central venous catheter leakage is an urgent problem to be solved. Summary of the invention

[0004] The invention provides a central venous catheter which is easy to clean and is used to solve the problem that the central venous catheter is easily damaged due to excessive internal pressure when injecting physiological saline.

[0005] The technical solution of the present invention is as follows:

[0006] A central venous catheter that is easy to clean comprises a tube body, at least three pressure sensing units, a positioning cable, a support structure and a display, wherein each pressure sensing unit is arranged along the axis direction of the tube body, each pressure sensing unit is connected to the positioning cable respectively, the data connector is connected to the positioning cable, the positioning cable is inserted into the tube body, each pressure sensing unit is sent into the tube body by the positioning cable, the data connector is detachably electrically connected to the display, each supporting structure is arranged along the axis direction of the positioning cable, the supporting structure is supported on the inner wall of the tube body, so that the positioning cable is fixed relative to the inner wall of the tube body, the supporting structure comprises a cylindrical structure, the positioning cable is connected to the inner side surface of the cylindrical structure, the outer diameter of the cylindrical structure is the same as the inner diameter of the tube body, the display is used to display the pressure value detected by each pressure sensor, the internal pressure of the tube body is known by the pressure value detected by each pressure sensing unit, and whether the tube body is leaking is judged by the change of the pressure value detected by each pressure sensing unit. When the tube body leaks, the positioning cable is pulled to move the cylindrical structure to the leaking place, and the leaking place is blocked by the cylindrical structure, and the cylindrical structure plays the role of tightening the positioning cable and blocking the leaking place at the same time.

[0007] In this solution, when the pressure in the tube body exceeds the pressure value that will leak, the tube body is at risk of leakage. Therefore, medical staff can observe the pressure value in the tube body through the display, so that medical staff can control the injection speed according to the pressure value displayed on the display to avoid leakage of the tube body due to excessive injection speed. When the tube body leaks, it can also be determined by the pressure value detected by each pressure sensing unit. For example, when a leak occurs in one part of the tube body, the pressure value detected by the pressure sensing unit closest to the place will decrease rapidly, and the pressure values ​​detected by other pressure sensing units on both sides of the pressure sensing unit will be higher than the pressure value detected by the pressure sensing unit. Therefore, when a pressure value is lower than the pressure values ​​on both sides during the injection process, it means that a leak has occurred at that place. Therefore, the three pressure sensing units can be used to detect whether the tube body is leaking, so that medical staff can handle it as soon as the tube body leaks. Because each pressure sensing unit is respectively arranged on the positioning cable, each pressure sensing unit on the cable can be installed into the tube body by simply inserting the cable into the tube body, which improves the installation efficiency of each pressure sensing unit. The positioning cable is fixed at various locations by supporting the inner wall of the tube body through several supporting structures, preventing the positioning cable from moving and curling, thereby preventing the positioning cable from affecting the fluid flowability of the tube body and preventing the positioning cable from increasing the injection resistance. A cylindrical structure is used as the supporting structure, and the outer diameter of the cylindrical structure is the same as the inner diameter of the tube body. Therefore, the cylindrical structure can only move along the axial direction of the tube body, which can ensure that the positioning cable cannot move in the radial direction of the tube body. The contact area between the cylindrical structure and the inner wall of the tube body is larger, and the movement resistance of the cylindrical structure along the axial direction of the tube body is also greater. Therefore, compared with the arc sheet, the cylindrical structure has a better fixing effect on the positioning cable in the straight part of the tube body. The entire outer side of the cylindrical structure is in contact with the inner wall of the tube body. Therefore, when the cylindrical structure moves to the leaking part of the tube body, the leaking part can be blocked. Therefore, the cylindrical structure can not only be used to fix the positioning cable, but also to block the leaking part of the tube body.

[0008] When the pressure value displayed on the display is abnormal, in order to facilitate medical staff to locate the leakage of the tube more quickly and conduct detection and confirmation, the pressure sensing units are arranged equidistantly along the positioning cable.

[0009] In this solution, the corresponding pressure sensing unit is found through the pressure value displayed on the display. Since the pressure sensing units have the same spacing, the position of the pressure sensing unit on the tube body can be determined according to the order of the pressure sensing units, thereby determining the position of the leak on the patient's body. Medical staff can observe the corresponding position of the patient's body to determine whether the tube is leaking.

[0010] In order to prevent the positioning cable from blocking the injection of the syringe, a branch tube for inserting the positioning cable is provided at the end of the tube body, and a sealing structure is provided between the positioning cable and the branch tube, and the sealing structure is used to block the branch tube.

[0011] In this solution, the positioning cable is inserted into the tube body from the branch tube. Therefore, the syringe can inject physiological saline from the end of the tube body without the syringe contacting the positioning cable and the positioning cable blocking the syringe.

[0012] Optionally, the supporting structure includes an arc-shaped piece, a middle portion of which is connected to the positioning cable, a radius of the arc-shaped piece is the same as an inner diameter of the tube body, and a central angle corresponding to the arc-shaped piece is greater than 180°.

[0013] In this solution, because the central venous catheter will also have a bend after being implanted in the human body, the cross-section of the tube at the bend will be deformed, especially at the neck position of the central venous catheter, where the bending angle of the tube is close to 90°. The arc-shaped sheet is used as a supporting structure, and the arc-shaped sheet has a stronger deformation ability and can more easily adapt to the shape of each bend of the tube. The central angle corresponding to the arc-shaped sheet is greater than 180°, which ensures that the arc-shaped sheet can effectively support and fix the positioning cable in the straight part of the tube, ensuring that the positioning cable will not move radially along the tube. The friction between the arc-shaped sheet and the inner wall of the tube prevents the positioning cable from moving toward the axial direction of the tube.

[0014] In order to solve the problem that the positioning cable is difficult to insert into the tube body, a hook is provided at the end of the positioning cable, and the hook is used to connect the traction rope. The traction rope pulls the hook to pull the positioning cable into the tube body.

[0015] In this solution, a traction rope can be passed through the other end of the tube body before the tube body is implanted in the patient's body, and then the traction rope is connected to the hook, and the positioning cable is pulled into the tube body through the traction rope. Because the positioning cable is pulled into the tube body by the tension at the end, it can be ensured that the positioning cable is parallel to the tube body at all places, so that the pressure sensing units on the positioning cable are distributed along the axis direction of the tube body.

[0016] Because there are many pressure sensing units, it is not easy for medical staff to observe when injecting saline. For this reason, the display is provided with a number of indicator lights, which correspond to each pressure sensing unit one by one. When the pressure sensing unit detects that the pressure value is greater than the set value, the color of the indicator light changes.

[0017] In this solution, the color change of the indicator light is used to determine whether the pressure value exceeds the set value. Compared with observing the numbers, the pressure situation in the tube can be discovered more quickly, which can avoid leakage caused by the medical staff's failure to observe in time, resulting in continuous excessive pressure in the tube.

[0018] Preferably, the end of the cylindrical structure is provided with a chamfer.

[0019] In this solution, after the end is chamfered, the end of the cylindrical structure is easier to insert into the tube body, which can reduce the difficulty of installation.

[0020] Preferably, an annular groove is provided on the outer side surface of the cylindrical structure.

[0021] In this solution, the cylindrical structure is provided with an annular groove, which can improve the bending ability of the cylindrical structure and make it easier for the cylindrical structure to pass through the bend of the pipe body.

[0022] Preferably, the opening width of the annular groove is greater than the bottom width of the annular groove.

[0023] In this solution, the opening width of the annular groove is larger than the bottom width, which can reduce the outer side area of ​​the cylindrical structure. When the cylindrical structure passes through the curved part of the tube body, the cylindrical structure will also bend. At this time, the inner side of the curved part of the cylindrical structure will greatly reduce the extrusion amount due to the large opening width of the annular groove, so that the outer side deformation of the cylindrical structure is minimized, so that it always fits the inner side of the tube body.

[0024] Beneficial effects of the present invention:

[0025] The present invention can observe the pressure in the tube body through the pressure sensing unit in the tube body, and can also determine whether the tube body is leaking through the pressure values ​​detected by multiple pressure sensing units, so that medical staff can deal with the leakage in the first time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solution of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the system structure of Embodiment 1;

[0028] Figure 2 is an axial cross-sectional view of the tube body in Example 1;

[0029] Figure 3 is an axial cross-sectional view of the tube body in Embodiment 2;

[0030] Figure 4 is an axial cross-sectional view of the tube body in Embodiment 3;

[0031] Figure 5 It is a radial cross-sectional view of the tube body when the supporting structure in the third embodiment is an arc-shaped sheet;

[0032] Figure 6 It is a radial cross-sectional view of the tube body when the supporting structure in the third embodiment is a cylindrical structure;

[0033] Figure 7 It is a left view of the cylindrical structure in Example 3.

[0034] In the above drawings, the corresponding reference numerals are as follows:

[0035] 1. Tube body; 2. Signal line; 3. Data connector; 4. Display; 5. Indicator light; 6. Pressure sensing unit; 7. Branch pipe; 8. Sealing structure; 9. Arc sheet; 10. Cylinder structure; 11. Positioning cable; 12. Annular groove. DETAILED DESCRIPTION

[0036] In conjunction with the accompanying drawings, the technical solution of the present invention is clearly and completely described through specific implementation methods of the embodiments of the present invention.

[0037] Embodiment 1:

[0038] like Figure 1 As shown, the first embodiment provides a central venous catheter that is easy to clean, including a tube body 1, at least three pressure sensing units 6 and a display 4. Each pressure sensing unit 6 is arranged on the inner wall of the tube body 1 along the axial direction of the tube body 1, and is used to detect the pressure at each position in the axial direction of the tube body 1. Each pressure sensing unit 6 is connected to a data connector 3, and the data connector 3 is detachably electrically connected to the display 4. When the data connector 3 is connected to the display 4, each pressure sensing unit 6 can transmit the detected pressure signal to the data connector 3, and the data connector 3 transmits the pressure signal to the display 4. The display 4 has a built-in controller, and the controller converts the pressure signal into a pressure value, and displays the pressure value detected by each pressure sensing unit 6 through the display 4.

[0039] The order of the pressure values ​​is the same as the order of the pressure sensing units 6 along the axis of the tube body 1. For example, along the axis of the tube body 1, the pressure value corresponding to the first pressure sensing unit 6 is ranked first, and the pressure value corresponding to the second pressure sensing unit 6 is ranked second. Medical personnel can determine the pressure of the position of the tube body 1 corresponding to the pressure value according to the display position of the pressure value on the display 4.

[0040] like Figure 2 As shown, each pressure sensing unit 6 is equidistantly arranged in the tube body 1, so as to facilitate the determination of the leakage position of the tube body 1 through the pressure sensing unit 6. The spacing between adjacent pressure sensing units 6 can be 5 cm, 6 cm, 7 cm, etc.

[0041] The data connector 3 is used to integrate the signals of each pressure sensing unit 6 , and the pressure signals of all the pressure sensing units 6 are transmitted to the display 4 through the data connector 3 .

[0042] After the injection of saline, the medical staff can separate the data connector 3 from the display 4, and the data connector 3 remains connected to the tube body 1, while the display 4 is taken away by the medical staff. In other words, the patient only needs to carry one data connector 3 at ordinary times, which will not interfere with the patient's activities.

[0043] Each pressure sensing unit 6 is connected to the data connector 3 via a signal line 2. The signal line 2 can be arranged in the tube wall of the tube body 1 and formed integrally with the tube body 1, or can be arranged in the tube body 1 after the tube body 1 is formed. A through hole is arranged on the side wall of the tube body 1 to facilitate the signal line 2 to pass through. After the signal line 2 passes through the through hole, the through hole is sealed by adhesive or by hot melting, thereby preventing leakage from the position where the signal line 2 passes through.

[0044] When injecting normal saline, first connect the data connector 3 to the display 4, and then observe whether the pressure value displayed on the display 4 exceeds the set value. After confirming that all pressure values ​​are lower than the set value, use a syringe to inject normal saline into the tube body 1. During the injection process, the medical staff observes the changes in the pressure value through the display 4. When a pressure value exceeds the set value, the medical staff can slow down the injection speed or temporarily stop the injection. If the injection is temporarily stopped, restart the injection after all pressure values ​​are reduced to below the set value. Because the pressure values ​​at various locations in the tube body 1 are always controlled below the set value during the injection process, leakage caused by excessive injection speed can be avoided.

[0045] Because the central venous catheter is implanted in the patient's body for a long time, the performance of the tube body 1 may decline after long-term use. Therefore, when injecting normal saline, even if the injection pressure is always controlled at the set value, it may cause the tube body 1 to leak. Therefore, medical staff can observe the changes in the pressure value through the display 4. During the injection process, the pressure values ​​increase or decrease in sequence, which means that the tube body 1 is normal. If a pressure value suddenly appears to be lower than the pressure values ​​on the front and back sides, it means that the pressure at the pressure sensing unit 6 corresponding to the pressure value is less than the pressure at both ends, indicating that a leak has occurred near the pressure sensing unit 6. At this time, the medical staff can determine which pressure sensing unit 6 on the tube body 1 the pressure sensing unit 6 is based on the sorting position of the pressure value, thereby determining the position of the pressure sensing unit 6 on the tube body 1, thereby determining the leak position of the tube body 1. After determining the leak position of the tube body 1, the corresponding part of the patient's body can be checked, and then it can be determined whether a leak has occurred. If a leak has occurred, the patient can be arranged to replace the central venous catheter in time.

[0046] When the medical staff increases the injection speed after reducing the injection speed, a pressure value lower than the pressure values ​​on both sides will be formed, which is equivalent to forming a pressure trough. However, as the injection progresses, the trough will continue to move, that is, along the order of the pressure sensing units 6, each pressure sensing unit 6 will detect a pressure value lower than the pressure at both ends in turn. In this case, it can be directly judged that the pressure value change is caused by the injection speed change. If a leak occurs, the lowest pressure value will always be at the same position. Therefore, it can also be judged whether a leak occurs based on whether the lowest pressure value changes in position.

[0047] It should be noted that the set value is a pressure value set artificially. When the pressure value exceeds the set value, the tube body 1 is prone to damage and leakage due to excessive internal pressure.

[0048] A plurality of indicator lights 5 may be provided on the display 4, and each indicator light 5 corresponds to a pressure sensing unit 6. When the pressure value exceeds the set value, the indicator light 5 displays a different color, so that the medical staff can observe the pressure more quickly, thereby controlling the speed of injecting the saline solution. For example, when the pressure value is lower than the set value, the indicator light 5 displays green. When the pressure value is higher than the set value, the indicator light 5 displays red.

[0049] The built-in controller of the display 4 can be a PLC or a single chip microcomputer.

[0050] The pressure sensing unit 6 is a pressure sensor.

[0051] When a pressure value is suddenly lower than the pressure values ​​on both sides, the controller can also control the indicator light 5 to change color, for example, the indicator light 5 changes to yellow, so that medical staff can pay attention to the pressure value at that location and determine whether a leak occurs at that location.

[0052] Embodiment 2:

[0053] The second embodiment provides a central venous catheter that is easy to clean. Different from the first embodiment, each pressure sensing unit 6 in the second embodiment is arranged on a positioning cable 11. The positioning cable 11 is inserted into the tube body 1, so that all the pressure sensing units 6 can be installed in the tube body 1.

[0054] like Figure 3 As shown, a branch tube 7 is provided at one end of the tube body 1 outside the patient's body, a positioning cable 11 is inserted from the branch tube 7, and a syringe injects saline from the end of the tube body 1. A sealing structure 8 is provided at the end of the branch tube 7, and the sealing structure 8 can be a cover or a plug provided on the branch tube 7. Due to the sealing of the branch tube 7, the injected medicine or saline is prevented from leaking from the branch tube 7.

[0055] The signal line 2 of each pressure sensing unit 6 is located in the positioning cable 11. In other words, the positioning cable 11 simultaneously carries the pressure sensing unit 6 and transmits the pressure signal.

[0056] Each pressure sensing unit 6 is equidistantly arranged on the positioning cable 11. After the positioning cable 11 is installed in the pipe body 1, the position of the first pressure sensing unit 6 can be used to determine the position of other pressure sensing units 6, thereby determining the leakage position of the pipe body 1. If it is not convenient to observe the position of the first pressure sensing unit 6, the first pressure sensing units 6 can be moved to a designated position on the pipe body 1 when the positioning cable 11 is installed, thereby facilitating the determination of the position of each pressure sensing unit 6. For example, the first pressure sensing unit 6 is arranged at the connection between the branch pipe 7 and the pipe body 1, or the first pressure sensing units 6 are 5 cm or other distances away from the connection between the branch pipe 7 and the pipe body 1.

[0057] One end of the positioning cable 11 inserted into the tube body 1 is provided with a hook. Before the tube body 1 is implanted into the patient's body, a traction rope is inserted from the other end of the tube body 1, the traction rope passes through the branch pipe 7, and then the traction rope is connected to the hook, and then the positioning cable 11 is pulled into the tube body 1. One end of the positioning cable 11 can be pulled out from the other end of the tube body 1, and then the connection between the traction rope and the hook is released, and then the positioning cable 11 is pulled in the reverse direction, and then the positioning cable 11 is pulled to a suitable position, for example, to the first pressure sensing unit 6 at the connection between the branch pipe 7 and the tube body 1. If the length of the positioning cable 11 is much smaller than the tube body 1, traction ropes can be provided at both ends of the positioning cable 11. When the positioning cable 11 needs to be pulled in the reverse direction, the positioning cable 11 is also pulled by the traction rope, and then the connection between the traction rope and the positioning cable 11 is released, and then the positioning cable 11 is connected to the data connector 3.

[0058] The hook may be a circular ring structure provided at the end of the positioning cable 11 .

[0059] Because the positioning cable 11 is moved into the tube body 1 by tension, the positioning cable 11 can remain parallel to the tube body 1 at all locations, thus ensuring that the pressure sensing units 6 are equidistantly located in the tube body 1 .

[0060] Embodiment three:

[0061] like Figure 4 As shown, the third embodiment provides a central venous catheter that is easy to clean. On the basis of the second embodiment, a support structure is arranged on the positioning cable 11, and the support structure is supported on the inner wall of the tube body 1 to fix the positioning cable 11 and prevent the positioning cable 11 from moving axially and radially along the tube body 1.

[0062] like Figure 5As shown, the supporting structure can be an arc-shaped sheet 9, and the positioning cable 11 is connected to the inner side surface of the arc-shaped sheet 9, and can be connected to the midpoint, end or other position of the inner side surface. A preferred embodiment is to connect the positioning cable 11 to the middle of the inner side surface of the arc-shaped sheet 9, so that the two sides of the positioning cable 11 can be evenly stressed, making the position of the positioning cable 11 relative to the inner wall of the tube body 1 more stable.

[0063] The outer diameter of the arc piece 9 is the same as the inner diameter of the tube body 1, and the central angle of the arc piece 9 is greater than 180°, which can ensure that the arc piece 9 will not move radially relative to the tube body 1. Because the positioning cable 11 is fixedly connected to the arc piece 9, it can also ensure that the positioning cable 11 will not move radially relative to the tube body 1. The arc piece 9 fits the inner wall of the tube body 1, and the friction between the arc piece 9 and the inner wall can prevent the positioning cable 11 from moving axially along the tube body 1.

[0064] The advantage of using the arc-shaped piece 9 is that the arc-shaped piece 9 is easier to deform. At the bend of the central venous catheter, the cross section of the tube body 1 will be deformed, and the arc-shaped piece 9 is easier to deform and pass through, thereby reducing the resistance to installing the positioning cable 11.

[0065] The positioning cable 11 will not move radially or axially along the tube body 1, which can prevent the positioning cable 11 from curling and affecting the fluidity in the tube body 1, and can prevent the positioning cable 11 from increasing the injection resistance. At the same time, it can also ensure that each pressure sensing unit 6 is accurately positioned, which is convenient for accurately determining the location of the leak in the tube body 1.

[0066] like Figure 6 As shown, the support structure can also be a cylindrical structure 10, and the positioning cable 11 is connected to the inner side of the cylindrical structure 10, and the outer diameter of the cylindrical structure 10 is the same as the inner diameter of the tube body 1. The advantage of the cylindrical structure 10 is that the contact surface with the inner wall of the tube body 1 is large, and it is easier to ensure that the positioning cable 11 does not move along the axial direction of the tube body 1.

[0067] Another advantage of the cylindrical structure 10 is that it can block the leaking part of the pipe body 1. When it is found that the pipe body 1 is indeed leaking, the positioning cable 11 can be pulled, so that the cylindrical structure 10 is pulled by the positioning cable 11, so that the cylindrical structure 10 moves to the leaking part, and the leaking part is blocked by the cylindrical structure 10.

[0068] The end of the cylindrical structure 10 may be chamfered to facilitate the insertion of the cylindrical structure 10 into the branch pipe 7 , thereby facilitating the installation of the cylindrical structure 10 into the pipe body 1 .

[0069] like Figure 7As shown, an annular groove 12 is provided on the outer side of the cylindrical structure 10. The annular groove 12 is provided in the middle of the cylindrical structure 10 along the axial direction of the cylindrical structure 10, and the annular groove 12 is not connected to the two ends of the cylindrical structure 10. When the cylindrical structure 10 enters the tube body 1, the outer side of the cylindrical structure 10 fits with the inner side of the tube body 1, and the annular space in the annular groove 12 is in a closed state. The annular groove 12 can make the cylindrical structure 10 easier to bend, so that it is convenient for the cylindrical structure 10 to pass through the bend of the tube body 1.

[0070] The side wall of the annular groove 12 is inclined relative to the axis of the cylindrical structure 10, and the opening width of the annular groove 12 is greater than the bottom width of the annular groove 12. When the cylindrical structure 10 passes through the curved part of the tube body 1, the cylindrical structure 10 will bend due to the force of the tube body 1. At this time, the inner side of the curved part of the cylindrical structure 10 will be squeezed and deformed, while the deformation at the annular groove 12 is located at the bottom of the groove. The opening width of the annular groove 12 is large and the coverage range is wide, which can reduce the deformation amount of the outer side surface of the cylindrical structure 10, so that the outer side surface of the cylindrical structure 10 can always fit the tube body 1.

[0071] A pressure sensing unit 6 may also be provided in the annular groove 12, and the positioning cable 11 may be electrically connected through the pressure sensing unit 6. When the leak of the tube body 1 is blocked by the cylindrical structure 10, the cylindrical structure 10 moves to the leak. At this time, if the annular groove 12 moves to the radial position of the leak, the leak of the tube body 1 is connected to the annular groove 12, and the pressure in the annular groove 12 changes. At this time, by observing whether the pressure value detected by the pressure sensing unit 6 in the annular groove 12 is consistent with the body pressure at the leak, it can be determined whether the cylindrical structure 10 has moved to the position of the leak.

[0072] The cylindrical structure 10 and the arc-shaped piece 9 are made of the same material as the tube body 1, and both are deformable, so as to facilitate passing through the bend of the tube body 1. The axial length of the cylindrical structure 10 is greater than the axial length of the arc-shaped piece 9. The longer the length of the cylindrical structure 10 is, the easier it is to block the leakage of the tube body 1, and the greater the installation difficulty and movement resistance.

[0073] The supporting structure may only use the arc-shaped sheet 9, may only use the cylindrical structure 10, or may use both the arc-shaped sheet 9 and the cylindrical structure 10. When the supporting structure uses both the arc-shaped sheet 9 and the cylindrical structure 10, the arc-shaped sheet 9 and the cylindrical structure 10 are arranged crosswise, the arc-shaped sheet 9 can provide only a small amount of installation resistance while fixing the positioning cable 11, and the cylindrical structure 10 can seal when leakage occurs at various places of the pipe body 1.

Claims

1. A central venous catheter that is easy to clean, characterized in that: The device comprises a tube body (1), at least three pressure sensing units (6), a positioning cable (11), a data connector (3), a support structure and a display (4), wherein each pressure sensing unit (6) is arranged along the axial direction of the tube body (1), each pressure sensing unit (6) is respectively connected to the positioning cable (11), the data connector (3) is connected to the positioning cable (11), the positioning cable (11) is inserted into the tube body (1), each pressure sensing unit (6) is sent into the tube body (1) by the positioning cable (11), the data connector (3) is detachably electrically connected to the display (4), each support structure is arranged along the axial direction of the positioning cable (11), the support structure is supported on the inner wall of the tube body (1), and the positioning cable (11) is relatively close to the tube body (1) ) is fixed to the inner wall of the tube body (1), the supporting structure comprises a cylindrical structure (10), the positioning cable (11) is connected to the inner side of the cylindrical structure (10), the outer diameter of the cylindrical structure (10) is the same as the inner diameter of the tube body (1), the display (4) is used to display the pressure value detected by each pressure sensor, the internal pressure of the tube body (1) is known through the pressure value detected by each pressure sensing unit (6), and whether the tube body (1) is leaking is judged by the change of the pressure value detected by each pressure sensing unit (6). When the tube body (1) is leaking, the positioning cable (11) is pulled to move the cylindrical structure (10) to the leaking place, and the leaking place is blocked by the cylindrical structure (10). The cylindrical structure (10) simultaneously plays the role of tightening the positioning cable (11) and blocking the leaking place.

2. A central venous catheter that is easy to clean according to claim 1, characterized in that: The pressure sensing units (6) are arranged at equal distances along the positioning cable (11).

3. A central venous catheter that is easy to clean according to claim 1, characterized in that: The end of the tube body (1) is provided with a branch pipe (7) for inserting a positioning cable (11), and a sealing structure (8) is provided between the positioning cable (11) and the branch pipe (7), and the sealing structure (8) is used to seal the branch pipe (7).

4. The central venous catheter that is easy to clean according to claim 1, characterized in that: The supporting structure also includes an arc-shaped piece (9), the middle part of which is connected to the positioning cable (11), the radius of the arc-shaped piece (9) is the same as the inner diameter of the tube body (1), and the central angle corresponding to the arc-shaped piece (9) is greater than 180°.

5. The central venous catheter that is easy to clean according to claim 1, characterized in that: The end of the positioning cable (11) is provided with a hook, and the hook is used to connect to a traction rope. The traction rope pulls the hook to pull the positioning cable (11) into the tube body (1).

6. The central venous catheter that is easy to clean according to claim 1, characterized in that: The display (4) is provided with a plurality of indicator lights (5), and the indicator lights (5) correspond to each pressure sensing unit one by one. When the pressure sensing unit detects that the pressure value is greater than the set value, the color of the indicator lights (5) changes.

7. The central venous catheter that is easy to clean according to claim 1, characterized in that: The end of the cylindrical structure (10) is provided with a chamfer.

8. The central venous catheter that is easy to clean according to claim 1, characterized in that: An annular groove (12) is provided on the outer side surface of the cylindrical structure (10).

9. The central venous catheter that is easy to clean according to claim 8, characterized in that: The opening width of the annular groove (12) is greater than the bottom width of the annular groove (12).

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