In-vitro catheter measuring scale

Abstract

The utility model discloses an extracorporeal catheter measuring scale, which belongs to the technical field of medical instruments and comprises a first round scale and a second round scale, the first round scale and the second round scale are positioned on the same axis, a first gap is arranged between the first round scale and the second round scale, and length scales are arranged on the arc-shaped outline of the first round scale or the second round scale. The guide pipe is located in the first gap, the first round ruler and the second round ruler roll along the guide pipe, the length of the guide pipe is determined through the length scales, and the first round ruler and the second round ruler can slide relatively to change the distance of the first gap so as to adapt to guide pipes with different diameters. When the length of the catheter is measured, the catheter is located in the first gap, then the first round ruler and the second round ruler roll along the catheter, the length of the catheter is confirmed by observing the length scales, and the measurement accuracy of the length of the catheter is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to an extracorporeal catheter measuring ruler. Background Art

[0002] Thoracic drainage is an important treatment for chest diseases such as pleural effusion and pneumothorax. Thoracic drainage can effectively remove fluid or air accumulation in the pleural cavity, alleviate patient symptoms, and promote recovery. However, during thoracic drainage, accurately measuring the exposed length of the drainage tube is crucial for ensuring drainage effectiveness and preventing complications. Furthermore, precise measurement of the exposed length of various catheters, such as PICCs and CVCs, is also crucial.

[0003] Traditional methods often rely on visual inspection or manual measurement by medical staff, which is susceptible to human factors and leads to inaccurate measurement results. The operation is cumbersome: When using traditional tools (such as tape measures and rulers) for measurement, the position of the drainage tube needs to be adjusted multiple times, which increases the complexity and time cost of the operation.

[0004] The existing patent discloses an auxiliary measuring ruler, including a lower shell, an upper cover, a tape measure frame, and a tape measure. The tape measure frame is provided in the lower shell, the tape measure is provided on the tape measure frame, and the upper cover is provided above the lower shell. The tape measure frame is a horizontal bar structure around an intermediate cylinder. The tape measure is provided in an arc-shaped hole at the end of the horizontal bar. The intermediate cylinder is connected to a positioning column. The tape measure frame can rotate on the positioning column. The tape measure is made of paper and can be bent at will, which is convenient for measuring the in vitro length of the catheter.

[0005] The above-mentioned patent can be bent at will during measurement to accurately measure catheters outside the body. However, when using the above-mentioned patent to measure catheters outside the body, since the catheter may have various bending angles, the tape measure needs to be swung to various angles for measurement. At this time, the tape measure may move, making the length judgment inaccurate.

[0006] Therefore, it is urgent to design an extracorporeal catheter measuring ruler to solve the above-mentioned problems. Utility Model Content

[0007] The purpose of the utility model is to provide an extracorporeal catheter measuring ruler, which has the advantage of accurate catheter measurement and solves the problems mentioned in the background technology.

[0008] To achieve the above-mentioned purpose, the specific technical solution of an extracorporeal catheter measuring ruler of the present invention is as follows:

[0009] An extracorporeal catheter measuring ruler comprises a first circular ruler and a second circular ruler, the first circular ruler and the second circular ruler being located on the same axis, a first gap being provided between the first circular ruler and the second circular ruler, and length scales being provided on the arcuate profiles of the first circular ruler and / or the second circular ruler. When measuring the length of a catheter, the catheter is located in the first gap, the first circular ruler and the second circular ruler roll along the catheter, and the length of the catheter is confirmed by the length scale. The first circular ruler and the second circular ruler can slide relative to each other to change the distance of the first gap to accommodate catheters of different diameters. The distance of the first gap is the same as the diameter of the catheter, and when measuring the length of the catheter, the catheter is squeezed and unblocked.

[0010] Furthermore, it also includes a first support rod and a second support rod, the first support rod is rotatably connected to the first circular ruler, the first support rod and the second circular ruler are provided with a first inner cavity, the first inner cavity is slidably connected to the second support rod, and the second support rod is rotatably connected to the second circular ruler.

[0011] Furthermore, a diameter scale is provided on the second support rod, and the second support rod extends beyond the first support rod, and the diameter of the catheter can be confirmed by the diameter scale located outside the first support rod.

[0012] Furthermore, a sliding groove is provided on the second support rod, and a limiting block is slidably connected in the sliding groove. The limiting block can slide radially relative to the second support rod. When the limiting block is against the first inner cavity, the first support rod and the second support rod stop sliding, so that the distance of the first gap is fixed.

[0013] Furthermore, the limiting block and the first inner cavity are both provided with anti-slip grooves.

[0014] Furthermore, a second inner cavity is opened on the second support rod, and a control rod is provided in the second inner cavity. The control rod can slide relative to the second inner cavity. A sliding rod is fixedly connected to the limit block. The sliding rod passes through the second support rod and extends into the second inner cavity. One end of the sliding rod extending into the second inner cavity is fixedly connected to a stop block, which abuts against the control rod. When the control rod slides in the first direction, the limit block slides toward the first inner cavity. When the control rod slides in the second direction, the limit block slides toward the slide groove.

[0015] Furthermore, the control rod includes a conical section and a cylindrical section. The conical section is provided with a small diameter end and a large diameter end. The large diameter end of the conical section is fixedly connected to the cylindrical section. When the stop block abuts against the small diameter end of the conical section, the limit block is located in the slide groove. When the stop block abuts against the large diameter end of the conical section, the limit block abuts against the first inner cavity.

[0016] Furthermore, a slider is fixedly connected in the second inner cavity, and a limiting groove is provided on the control rod, which is slidably connected to the slider. The limiting groove includes a first vertical section, a horizontal section, and a second vertical section. The first vertical section and the second vertical section are respectively located at the two ends of the horizontal section. When the slider is located in the horizontal section, the control rod can slide in the first direction or the second direction. When the slider is located in the first vertical section or the second vertical section, the control rod stops sliding relative to the second inner cavity in the first direction or the second direction.

[0017] Furthermore, the first support rod and the second support rod are both fixedly connected with a retaining ring, and the first ruler and the second ruler are both provided with a retaining groove. The first ruler is rotatably connected to the retaining ring of the first support rod through the retaining groove, and the second ruler is rotatably connected to the retaining ring of the second support rod through the retaining groove.

[0018] Furthermore, a first spring is provided in the slot on the second ruler, and both ends of the first spring respectively abut against the slot of the second ruler and the snap ring of the second support rod. The first spring is located at the end of the second ruler away from the first ruler.

[0019] The utility model has the following advantages: when measuring the length of a catheter, the catheter is located in the first gap, and then the first circular ruler and the second circular ruler are rolled along the catheter, and the length of the catheter is confirmed by observing the length scale, thereby ensuring the measurement accuracy of the catheter length. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the extracorporeal catheter measuring ruler of the present invention;

[0021] Figure 2 This is a schematic diagram of the exploded structure of the extracorporeal catheter measuring ruler of the present invention;

[0022] Figure 3 This is a schematic cross-sectional structure diagram of the first support rod of the present invention;

[0023] Figure 4 This is a schematic structural diagram of the second support rod and the control rod of the utility model;

[0024] Figure 5 This is a schematic diagram of the explosion structure of the second support rod of the utility model;

[0025] Figure 6 This is a structural diagram of the slider and the limiting groove of the utility model;

[0026] Figure 7 This is a schematic structural diagram of the clamping ring and the clamping groove of the utility model;

[0027] Figure 8 This is a schematic structural diagram of the first spring of the utility model;

[0028] Explanation of the marks in the figure: 1. First circular ruler; 11. Length scale; 12. Display screen; 2. First support rod; 21. First inner cavity; 3. Second circular ruler; 31. Slot; 32. First spring; 4. Second support rod; 41. Diameter scale; 42. Limit block; 43. Sliding rod; 44. Stop block; 45. Second inner cavity; 46. Second spring; 47. Retaining ring; 48. Slider; 5. Control rod; 51. Cone section; 52. Cylindrical section; 6. Limiting slot; 61. First vertical section; 62. Horizontal section; 63. Second vertical section. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0030] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is intended to be within the scope of the present invention and to form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0031] Please refer to the attached Figure 1 To the attached Figure 8 The utility model describes an extracorporeal catheter measuring ruler.

[0032] Currently, when measuring an extracorporeal catheter using a measuring tape in the prior art, since the catheter may be bent at various angles, the measuring tape needs to be swung to various angles for measurement. At this time, the measuring tape may move, resulting in inaccurate length judgment.

[0033] Therefore, the external catheter measuring ruler includes a first circular ruler 1 and a second circular ruler 3. The first circular ruler 1 and the second circular ruler 3 are located on the same axis. A first gap is provided between the first circular ruler 1 and the second circular ruler 3. A length scale 11 is provided on the arc-shaped contour of the first circular ruler 1 and / or the second circular ruler 3. When measuring the length of the catheter, the catheter is located in the first gap, and the first circular ruler 1 and the second circular ruler 3 roll along the catheter. The length of the catheter is confirmed by the length scale 11. The first circular ruler 1 and the second circular ruler 3 can slide relative to each other to change the distance of the first gap to adapt to catheters of different diameters.

[0034] The first gap is preferably the same as the diameter of the catheter. When the catheter is located in the first gap, the catheter is in contact with both the first circular ruler 1 and the second circular ruler 3. Since the tape is wrapped around the outside of the catheter, the catheter is slightly squeezed when the first circular ruler 1 and the second circular ruler 3 are rolled for measurement, so that impurities and crystals in the catheter are squeezed and then cleared. In other embodiments of the present invention, the first gap may also be a certain distance larger than the diameter of the catheter. Therefore, when the first circular ruler 1 and the second circular ruler 3 roll, the tape is wrapped around the outside of the catheter, thereby ensuring the rolling smoothness of the first circular ruler 1 and the second circular ruler 3, while avoiding harm to medical staff and patients.

[0035] The measuring ruler is placed outside the catheter through the first gap, and then the first circular ruler 1 and the second circular ruler 3 are rolled along the catheter. The length of the catheter is confirmed by observing the length scale 11, thereby ensuring the measurement accuracy of the catheter length.

[0036] Preferably, an angle sensor is provided on the first circular ruler 1 and / or the second circular ruler 3. When the first circular ruler 1 and the second circular ruler 3 roll, the length value of the catheter is obtained through the angle sensor. In other embodiments of the present invention, other sensors may be provided on the first circular ruler 1 or the second circular ruler 3 as long as it is possible to obtain the length value of the catheter.

[0037] Preferably, a display screen 12 is provided on the first circular ruler 1 and / or the second circular ruler 3, and the display screen 12 is electrically connected to the angle sensor. It should be noted that the angle sensor on the first circular ruler 1 is connected to the display screen 12 on the first circular ruler 1, and the angle sensor on the second circular ruler 3 is connected to the display screen 12 on the second circular ruler 3, so that the catheter length obtained by the angle sensor is displayed on the display screen 12, which is convenient for medical staff to observe. In other embodiments of the present invention, the angle sensor can also be connected to an external device, such as an APP, a computer or other terminal, to upload the catheter length value to the terminal for recording.

[0038] Regarding the setting positions of the length scale 11 and the display screen 12, they are preferably set on the first circular ruler 1 and the second circular ruler 3 so that medical staff can observe the length of the catheter from both ends. In other embodiments of the present invention, they can also be set separately on the first circular ruler 1 or the second circular ruler 2, as long as it is convenient for medical staff to observe the length of the catheter.

[0039] The measuring ruler also includes a first support rod 2 and a second support rod 4. The first support rod 2 is rotatably connected to the first circular ruler 1. A first inner cavity 21 is provided on the first support rod 2 and the second circular ruler 3. The first inner cavity 21 is slidably connected to the second support rod 4. The second support rod 4 is rotatably connected to the second circular ruler 3.

[0040] When measuring the length of the catheter, the medical staff can place both hands on the first support rod 2 and the second support rod 4 respectively, so as to facilitate the first circular ruler 1 and the second circular ruler 3 to roll along the catheter for measurement. By arranging the first support rod 2 to be rotatably connected to the first circular ruler 1 and the second support rod 4 to be rotatably connected to the second circular ruler 3, when the first circular ruler 1 and the second circular ruler 3 are rolled along the catheter for measurement, the first support rod 2 and the second support rod 4 will not rotate with them, which is convenient for medical staff to hold.

[0041] The first inner cavity 21 is slidably connected to the second support rod 4 so that the distance of the first gap can be adjusted to accommodate catheters of different diameters.

[0042] Preferably, a diameter scale 41 is provided on the second support rod 4 , and the second support rod 4 extends outside the first support rod 2 , and the diameter of the catheter can be confirmed by the diameter scale 41 located outside the first support rod 2 .

[0043] Furthermore, a sliding groove is provided on the second support rod 4, and a limiting block 42 is slidably connected in the sliding groove. The limiting block 42 can slide radially relative to the second support rod 4. After the distance adjustment of the first gap is completed, the limiting block 42 is driven to slide toward the end of the first inner cavity 21. When the limiting block 42 is against the first inner cavity 21, the first support rod 2 and the second support rod 4 stop sliding, so that the distance of the first gap is fixed.

[0044] The first support rod 2 and the second support rod 4 are non-slip, that is, the second support rod 4 cannot slide relative to the first support rod 2 .

[0045] Furthermore, both the limit block 42 and the first inner cavity 21 are provided with anti-slip grooves. By providing the anti-slip grooves, the friction between the limit block 42 and the first inner cavity 21 is increased when the limit block 42 and the first inner cavity 21 are in contact with each other, further ensuring that the second support rod 4 cannot slide relative to the first support rod 2 at this time.

[0046] Specifically, a second inner cavity 45 is opened on the second support rod 4, and a control rod 5 is provided in the second inner cavity 45. The control rod 5 can slide relative to the second inner cavity 45. A sliding rod 43 is fixedly connected to the limit block 42. The sliding rod 43 passes through the second support rod 4 and extends into the second inner cavity 45. One end of the sliding rod 43 extending into the second inner cavity 45 is fixedly connected with a stop block 44. The stop block 44 abuts against the control rod 5. When the control rod 5 slides in the first direction A, the limit block 42 slides toward the first inner cavity 21. When the control rod 5 slides in the second direction B, the limit block 42 slides toward the slide groove.

[0047] Preferably, a second spring 46 is sleeved on the sliding rod 43, and the two ends of the second spring 46 are fixedly connected to the second inner cavity 45 and the stop block 44 respectively, so that when the control rod 5 slides in the second direction B, the elastic force of the second spring 46 is released, and the limit block 42 slides toward the slide groove. In other embodiments of the present utility model, the limit block 42 can also be reset by its own gravity or other structures, as long as it can be satisfied that the limit block 42 slides toward the slide groove when the control rod 5 slides in the second direction B.

[0048] Preferably, the control rod 5 includes a conical section 51 and a cylindrical section 52. The conical section 51 is provided with a small diameter end and a large diameter end. The large diameter end of the conical section 51 is fixedly connected to the cylindrical section 52. The control rod 5 can be slid so that the stop block 44 abuts against the small diameter end of the conical section 51 or the stop block 44 abuts against the large diameter end of the conical section 51. When the stop block 44 abuts against the small diameter end of the conical section 51, the limit block 42 is located in the slide groove. When the stop block 44 abuts against the large diameter end of the conical section 51, the limit block 42 abuts against the first inner cavity 21.

[0049] A slider 48 is fixedly connected to the second inner cavity 45, and a limiting groove 6 is provided on the control rod 5. The limiting groove 6 is slidably connected to the slider 48. The limiting groove 6 includes a first vertical section 61, a horizontal section 62 and a second vertical section 63. The first vertical section 61 and the second vertical section 63 are respectively located at the two ends of the horizontal section 62. When the slider 48 is located in the horizontal section 62, the control rod 5 can slide in the first direction A or the second direction B. When the slider 48 is located in the first vertical section 61 or the second vertical section 63, the control rod 5 stops sliding relative to the second inner cavity 45 in the first direction A or the second direction B, thereby avoiding the effect of automatic resetting of the control rod 5.

[0050] After the distance adjustment of the first gap is completed, the control rod 5 is pushed in the first direction A until the stop block 44 abuts against the large diameter end of the conical section 51. At this time, the limit block 42 abuts against the first inner cavity 21, so that the first gap distance is fixed. Then, the control rod 5 is rotated counterclockwise to make the slider 48 slide to the first vertical section 61. At this time, the control rod 5 stops sliding in the first direction A or the second direction B, ensuring the accuracy of the first gap distance.

[0051] When the distance of the first gap needs to be adjusted, the control rod 5 is rotated clockwise to make the slider 48 slide from the first vertical section 61 to the connection between the first vertical section 61 and the horizontal section 62, and then the control rod 5 is pulled in the second direction B, and the slider 48 slides from the horizontal section 62 to the second direction B. At this time, the limit block 42 cancels the contact with the first inner cavity 21, and the limit block 42 slides toward the slide groove until the slider 48 slides to the connection between the horizontal section 62 and the second vertical section 63, and then the control rod 5 is rotated clockwise to make the slider 48 slide to the second vertical section 63, so that the control rod 5 stops sliding in the first direction A or the second direction B.

[0052] Preferably, the first support rod 2 and the second support rod 4 are both fixedly connected with a snap ring 47, and the first round ruler 1 and the second round ruler 3 are both provided with a slot 31. The first round ruler 1 is rotatably connected to the snap ring 47 of the first support rod 2 through the slot 31, and the second round ruler 3 is rotatably connected to the snap ring 47 of the second support rod 4 through the slot 31, so that the first round ruler 1 and the second round ruler 3 can rotate relative to the first support rod 2 and the second support rod 4, but cannot slide relative to the first support rod 2 and the second support rod 4.

[0053] Due to the different thicknesses of the tape wrapped around the outside of the catheter, when the first ruler 1 and the first ruler 1 move to a position where the tape is wrapped with a larger thickness, the first ruler 1 and the second ruler 3 may be difficult to roll, and the deformation of the squeezed catheter is too large, which may cause harm to the patient. Therefore, a first spring 32 is provided in the slot 31 on the second ruler 3, and the two ends of the first spring 32 are respectively against the slot 31 of the second ruler 3 and the snap ring 47 of the second support rod 4. The first spring 32 is located at the end of the second ruler 3 away from the first ruler 1, so that when the first ruler 1 and the second ruler 3 move to a position where the tape is wrapped with a larger thickness, the second ruler 3 overcomes the elastic force of the first spring 32 and slides outward. When it rolls to the normal position, the elastic force of the first spring 32 is released, so that the first gap distance is restored.

[0054] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. 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. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An extracorporeal catheter measuring ruler, characterized in that: The device comprises a first circular ruler and a second circular ruler, the first circular ruler and the second circular ruler being located on the same axis, a first gap being provided between the first circular ruler and the second circular ruler, and a length scale being provided on the arc-shaped profile of the first circular ruler and / or the second circular ruler. When measuring the length of a catheter, the catheter is located in the first gap, the first circular ruler and the second circular ruler roll along the catheter, and the length of the catheter is confirmed by the length scale. The first circular ruler and the second circular ruler can slide relative to each other to change the distance of the first gap to adapt to catheters of different diameters. The distance of the first gap is the same as the diameter of the catheter. When measuring the length of the catheter, the catheter is squeezed and unblocked.

2. The extracorporeal catheter measuring ruler according to claim 1, characterized in that: It also includes a first support rod and a second support rod, the first support rod is rotatably connected to the first circular ruler, the first support rod and the second circular ruler are provided with a first inner cavity, the first inner cavity is slidably connected to the second support rod, and the second support rod is rotatably connected to the second circular ruler.

3. The extracorporeal catheter measuring ruler according to claim 2, characterized in that: The second support rod is provided with a diameter scale, and the second support rod extends beyond the first support rod. The diameter of the catheter can be confirmed by the diameter scale located outside the first support rod.

4. The extracorporeal catheter measuring ruler according to claim 2, characterized in that: The second support rod is provided with a sliding groove, and a limiting block is slidably connected in the sliding groove. The limiting block can slide radially relative to the second support rod. When the limiting block abuts against the first inner cavity, the first support rod and the second support rod stop sliding, so that the distance of the first gap is fixed.

5. The extracorporeal catheter measuring ruler according to claim 4, characterized in that: The limiting block and the first inner cavity are both provided with anti-slip grooves.

6. The extracorporeal catheter measuring ruler according to claim 4, characterized in that: A second inner cavity is provided on the second support rod, and a control rod is provided in the second inner cavity. The control rod can slide relative to the second inner cavity. A sliding rod is fixedly connected to the limit block, which passes through the second support rod and extends into the second inner cavity. An end of the sliding rod extending into the second inner cavity is fixedly connected to a stop block, which abuts against the control rod. When the control rod slides in the first direction, the limit block slides toward the first inner cavity. When the control rod slides in the second direction, the limit block slides toward the sliding groove.

7. The extracorporeal catheter measuring ruler according to claim 6, characterized in that: The control rod includes a conical section and a cylindrical section. The conical section is provided with a small diameter end and a large diameter end. The large diameter end of the conical section is fixedly connected to the cylindrical section. When the abutting block abuts against the small diameter end of the conical section, the limit block is located in the slide groove. When the abutting block abuts against the large diameter end of the conical section, the limit block abuts against the first inner cavity.

8. The extracorporeal catheter measuring ruler according to claim 6, characterized in that: A slider is fixedly connected in the second inner cavity, and a limiting groove is provided on the control rod. The limiting groove is slidably connected to the slider. The limiting groove includes a first vertical section, a horizontal section, and a second vertical section. The first vertical section and the second vertical section are respectively located at two ends of the horizontal section. When the slider is in the horizontal section, the control rod can slide in the first direction or the second direction. When the slider is in the first vertical section or the second vertical section, the control rod stops sliding relative to the second inner cavity in the first direction or the second direction.

9. The extracorporeal catheter measuring ruler according to claim 2, characterized in that: The first support rod and the second support rod are both fixedly connected with a snap ring, and the first ruler and the second ruler are both provided with a slot. The first ruler is rotatably connected to the snap ring of the first support rod through the slot, and the second ruler is rotatably connected to the snap ring of the second support rod through the slot.

10. The extracorporeal catheter measuring ruler according to claim 9, characterized in that: A first spring is provided in the slot on the second ruler. Two ends of the first spring respectively abut against the slot of the second ruler and the snap ring of the second support rod. The first spring is located at one end of the second ruler away from the first ruler.

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