A ventricular volume reduction dynamometer

Abstract

The present invention belongs to the technical field of medical devices, and discloses a ventricular volume reduction dynamometer, which includes a push tube, an elastic handle and a locking structure. A scale marking is provided on the outer periphery of the proximal end of the push tube, and the proximal end of the push tube is connected to the elastic handle; the push tube moves axially along the elastic handle. When the push tube is in a non-loaded state, the proximal end of the scale marking is flush with the distal end of the elastic handle. The locking structure passes through the elastic handle and can move axially along the push tube. The present invention has a structural design that combines locking, dissociation and force measurement, so as to further simplify the operation, facilitate the use by medical staff, and reduce the probability of accidents caused by frequent equipment replacement during the operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a ventricular volume reduction dynamometer. Background Art

[0002] Left ventricular aneurysm (LVA) is a common complication of myocardial infarction. After coronary myocardial infarction, it will cause ischemia and necrosis of part of the ventricular muscle. The necrotic ventricular muscle loses its contractile function. During cardiac contraction, this part of the necrotic myocardium will bulge outwards, forming an aneurysm, also called scar tissue. Due to the compensatory effect of the heart, the heart will continue to enlarge, and then heart failure, pulmonary congestion and other conditions will occur.

[0003] Left ventricular volume reduction is a ventricular enhancement method, which can be used to solve the problem of scar tissue in patients with ischemic cardiomyopathy after myocardial infarction. The patent with the application number 2022104104042 discloses a locking structure and an external anchor for a left ventricular volume reduction device. The left ventricular volume reduction device in this patent includes three parts: an internal anchor, an external anchor and a locking structure, as shown in the attached Figure 1-2 figure. The internal anchor and the external anchor are connected by a tie rod. One end of the tie rod is fixed to the internal anchor, and the external anchor passes through the tie rod. By controlling the moving distance of the external anchor relative to the tie rod, the volume of the left ventricle is controlled to achieve the purpose of left ventricular volume reduction. By rotating the knob on the anchoring structure, the position of the external anchor is locked. There is no matching dynamometer in the prior art, or different devices are required to measure the force of the external anchor and lock the external anchor, which increases the number and complexity of surgical devices. Summary of the Invention

[0004] The purpose of the present invention is to provide a ventricular volume reduction dynamometer for the technology in the patent with the application number 2022104104042.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A ventricular volume reduction dynamometer includes a push tube and an elastic handle. A scale mark is provided on the outer periphery of the proximal end of the push tube, and the proximal end of the push tube is connected to the elastic handle; the push tube moves axially along the elastic handle. When the push tube is in a non-force state, the proximal end of the scale mark is flush with the distal end of the elastic handle.

[0007] Further, the diameter of the distal end of the push tube is greater than the maximum length between two points of the cross-section of the external locking structure, and the part of the distal end of the push tube passing through the locking structure abuts against the external anchor

[0008] Further, a pre-locking window is provided at the distal end of the push tube. After the outer anchor is pushed to the target position by the push tube, an external tether can pass through the pre-locking window horizontally, abut against the proximal end of the external locking structure and be fixedly connected to the tie rod to limit the axial position of the locking structure.

[0009] Further, the elastic handle includes a hollow first housing and an elastic member located inside the first housing. The distal end of the elastic member abuts against the proximal end of the push tube.

[0010] Further, a baffle is provided at the proximal end of the push tube, and the baffle is located inside the elastic handle.

[0011] Further, the locking knob includes a first knob at the proximal end, a first rotating shaft at the distal end, and a first groove between the first knob and the first rotating shaft. A first buckle is provided at the proximal end of the elastic handle. The diameter of the first buckle is between the first groove and the first knob, and the first groove can move axially along the elastic handle.

[0012] Further, a second housing is further provided at the proximal end of the first housing. A locking window is provided on the outer periphery of the second housing. A locking boss is provided on the outer periphery of the snap ring, and the locking boss passes through the locking window to the outside of the elastic handle.

[0013] Further, the ventricular volume reduction dynamometer further includes a fixing structure. The fixing structure includes a fixing knob and a fixing rod fixedly connected to the distal end of the fixing knob. The distal end of the fixing rod has a thread, and the fixing rod passes through the locking tube and the first housing and can be threadedly connected to the locking structure.

[0014] Further, a stepped groove with a constricted proximal end is provided at the proximal end of the locking knob. A fixing ring matching with the constricted opening is provided on the outer periphery of the fixing knob, and the constricted opening is engaged with the fixing ring to connect the locking knob and the fixing knob.

[0015] Compared with the prior art, the ventricular volume reduction dynamometer provided by the present invention has the following beneficial effects:

[0016] 1. It can measure the pressure of the outer anchor on the outer wall of the left ventricle, control the pressure to be 1-8 N, and select appropriate pressure values for different patients in combination with other detection data before the operation.

[0017] 2. The locking structure and the dissociation structure are integrated on the dynamometer handle, realizing the integration of the locking, dissociation and force measurement functions. The structure is more compact. During the operation, there is no need to replace the locking and dissociation equipment separately, which further simplifies the operation, is convenient for medical staff to use, and reduces the probability of accidents caused by frequent replacement of equipment during the operation.

[0018] 3. The distal end of the locking tube is provided with an axially extending raised block, and the distal end of the fixing rod is provided with a thread. First, the position of the locking structure is preliminarily fixed by the raised block to prevent its rotation, and then the locking structure and the force gauge are connected by the thread at the distal end of the fixing rod. Then, the raised block is rotated to lock the locking structure, and further fix the outer anchor. By the threaded connection between the distal end of the locking tube and the locking structure, the stability of the subsequent locking process can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the prior art locking structure provided by the background art;

[0020] Figure 2 is a schematic diagram of the prior art locking structure provided by the background art;

[0021] Figure 3 is a structural diagram of a ventricular volume reduction force gauge provided by Embodiment 1;

[0022] Figure 4 is a cross-sectional view of a ventricular volume reduction force gauge provided by Embodiment 1;

[0023] Figure 5 is a structural diagram of the handle provided by Embodiment 1;

[0024] Figure 6 is a schematic diagram of the T-shaped tube provided by Embodiment 1;

[0025] Figure 7 is a schematic diagram of the thread and the clamping boss provided by Embodiment 1;

[0026] Figure 8 is a schematic diagram of the dissociation structure provided by Embodiment 1;

[0027] Figure 9 is a schematic diagram of the locking structure provided by Embodiment 1;

[0028] Figure 10 is a schematic diagram of the combination of the force gauge structure provided by Embodiment 1 and the outer anchor in the prior art;

[0029] Figure 11 is a schematic diagram of the combination of the force gauge structure provided by Embodiment 1 and the locking structure in the prior art;

[0030] Figure 12 is a schematic diagram of the combination of the force gauge structure provided by Embodiment 1 and the outer anchor in the prior art;

[0031] Figure 13 is a schematic diagram of the combination of the force gauge structure provided by Embodiment 1 and the locking structure in the prior art;

[0032] Figure 14 is a schematic diagram of the combination of the force gauge structure provided by Embodiment 1 and the outer anchor in the prior art;

[0033] Figure 15 It is a schematic diagram showing the combination of the force gauge structure provided in the first embodiment and the locking structure in the prior art;

[0034] Among them, 1. Elastic handle; 11. First housing; 12. Second housing; 13. Baffle; 14. Locking window; 15. First buckle; 2. T-shaped tube; 21. Pushing tube; 22. Flap; 23. Pre-locking window; 3. Elastic member; 4. Locking structure; 41. Locking knob; 411. First knob; 412. First rotating shaft; 413. First groove; 414. Locking boss; 415. Second groove; 416. Second bayonet; 42. Locking tube; 421. Clamping boss; 5. Fixing structure; 51. Fixing knob; 511. Second knob; 512. Second rotating shaft; 513. Third groove; 52. Fixing rod; 521. Thread; 6. Scale marking; 7. Suture; 8. Tie rod; 9. Inner anchor; 10. Outer anchor; 20. Locking structure. Detailed implementation manners

[0035] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0036] The purpose of the present invention is to provide a force gauge for ventricular volume reduction in view of the defects of the prior art.

[0037] As Figure 1-2 shown, the patent with the application number 2022104104042 provides a locking structure on an outer anchor, and a device that can lock or unlock the tie rod 8 by controlling the locking structure 20. As Figures 11-15 is the process diagram (flow chart before dissociation) of pre-calibration of the force gauge for locking the locking structure 20. First, the locking structure is positioned by the clamping boss on the locking tube, and then the internal thread on the locking structure 20 is fixed by the thread 521 on the fixing rod 52. Finally, by rotating the locking tube 42, the locking structure 20 can be controlled to lock or dissociate the outer anchor 10, so as to control the distance between the inner anchor 9 and the outer anchor 10. That is, the present invention is proposed in cooperation with the locking structure in the above patent.

[0038] First embodiment

[0039] This embodiment provides a force gauge for ventricular volume reduction, as Figures 5-6As shown in the figure, it includes an elastic handle 1, a T-shaped tube 2, an elastic member 3, a locking structure 4, a fixing structure 5, and a scale marking 6.

[0040] As Figure 3 shown in the figure, the elastic handle 1 is a columnar structure formed integrally, and the inside of the elastic handle 1 is hollow. The elastic handle 1 is divided into a first housing 11 and a second housing 12 by a baffle 13 inside. The proximal end of the first housing 11 contacts the distal end of the second housing 12.

[0041] At the distal end of the first housing 11, a first opening is provided for the T-shaped tube 2 to pass through, so that the proximal end of the T-shaped tube passes through the first opening; the baffle 13 is provided with a second opening for the locking structure 4 to pass through, so that the locking structure 4 passes through the second opening.

[0042] On one side surface of the second housing 12, a locking window 14 is provided, so that the locking structure 4 rotates circumferentially within the range of the locking window 14.

[0043] At the proximal end of the second housing 12, a first buckle 15 is provided, so that the first buckle cooperates with the locking structure 4 to limit the axial movement of the locking structure 4.

[0044] As Figure 4 shown in the figure, the T-shaped tube 2 includes a hollow push tube 21 and a retaining piece 22. On one side surface of the push tube 21 near the distal end, a pre-locking window 23 is provided, and the function of the pre-locking window 23 is to facilitate the smooth entry of the external suture 7.

[0045] The retaining piece 22 is arranged inside the hollow first housing 11. The proximal end of the push tube 21 passes through the first opening and is fixedly connected to the retaining piece 22. The push tube 21 and the retaining piece 22 can be integrally formed or connected in other ways; in this embodiment, there is a through hole in the retaining piece 21 that penetrates the push tube 21.

[0046] It should be noted that the retaining piece 22 can also be replaced by other plug-like structures.

[0047] The elastic member 3 can be a spring or other elastic components. The elastic member 3 is arranged inside the hollow first housing 11. The distal end of the elastic member 3 abuts against the retaining piece 22, and the proximal end of the elastic member 3 abuts against the baffle 13; the elastic member 3 cooperates with the push tube 21, and using Hooke's law, the force applied to the push tube 21 can be measured.

[0048] The number of the scale markings 6 is 1 - 10, and preferably the number of the scale markings 6 is selected as 1 - 8; several scale markings 6 are sleeved on the outer peripheral side of the push tube 21 at equal intervals and are arranged at the position where the push tube 21 is connected to the distal end of the first housing 11. The scale markings 6 are used to mark the magnitude of the force measured by the force gauge.

[0049] As Figures 5-6As shown, the locking structure 4 includes a locking knob 41 and a locking tube 42. The locking knob 41 includes a first knob 411 and a first rotating shaft 412.

[0050] The locking tube 42 is sleeved inside the pushing tube 21, and there is a certain space between the outer surface of the locking tube 42 and the inner surface of the pushing tube 21, so that this space can accommodate the tie rod 8 and the suture 7.

[0051] The inside of the locking tube 42 is hollow; there are two clamping bosses 421 provided at the distal end of the locking tube 42, and the clamping bosses 421 are matched with the notches of the locking structure in the left ventricular volume reduction device in the prior art, so that the clamping bosses 421 are arranged in the notches. When dissociation is required, the locking structure 4 is rotated to achieve the dissociation of the force gauge.

[0052] The proximal end of the locking tube 42 passes through the through hole of the retaining piece 22 and the elastic member 3 in sequence, and then is fixedly connected with the first rotating shaft 412 through the second opening in the baffle 13.

[0053] The first rotating shaft 412 is arranged inside the hollow second housing 12. Part of the surface of the first rotating shaft 412 is exposed under the action of the locking window 14. The proximal end of the first rotating shaft 412 is fixedly connected with the first knob 411, and the first knob 411 is arranged at the proximal end of the second housing 12; a first groove 413 is provided on the outer peripheral side of the first rotating shaft 412, so that the first rotating shaft forms an I-shaped structure. The first buckle 15 at the proximal end of the second housing 12 is arranged within the range of the first groove 413. Through the mutual cooperation of the first buckle and the first groove 413, when the user moves the first knob 411 along the axis, the first knob 411 drives the first rotating shaft 412 to move axially, and then the first rotating shaft 412 drives the locking tube 42 to move axially within the range of the first groove 413.

[0054] There is also a locking boss 414 provided on the exposed outer surface at the distal end of the first rotating shaft 412. The height of the locking boss 414 arranged on the first rotating shaft 412 is higher than the height of the second housing 12 (that is, higher than the locking window 14), so that when the user rotates the first knob 411, the first knob 411 drives the first rotating shaft 412 to rotate, and then the first rotating shaft 412 drives the locking tube 42 to rotate within the locking window 14, thereby realizing dissociation.

[0055] In this embodiment, by providing the locking boss 414, the over-dissociation of the locking structure 4 can be prevented, and it has a warning effect.

[0056] As Figure 7 shown, the fixing structure 5 includes a fixing knob 51 and a fixing rod 52. The fixing knob 51 includes a second knob 511 and a second rotating shaft 512.

[0057] The fixed rod 52 is sleeved inside the locking tube 42. The distal end of the fixed rod 52 is provided with a thread 521, and this thread 5221 is matched with the thread of the locking structure in the left ventricular volume reduction device in the prior art, so that the thread 521 is adapted to the thread of the locking structure. When locking is required, the fixed structure 5 is rotated to realize the connection between the fixed rod 52 and the locking structure. By axially pulling the fixed rod 52, the locking of the fixed structure can be realized.

[0058] In this embodiment, a third opening for the fixed rod 52 to pass through is provided inside the first rotating shaft 412, so that the proximal end of the fixed rod 52 sequentially passes through the locking tube 42 and the first rotating shaft 412, and then is fixedly connected to the second rotating shaft 512.

[0059] In this embodiment, a second groove 415 adapted to the second rotating shaft 512 is provided at the proximal end of the first knob 411. The second groove 415 is a stepped groove, and a second bayonet 416 is provided at the proximal end of the first knob 411, so that the second rotating shaft 512 is arranged inside the second groove 415, and the proximal end of the second rotating shaft 512 is fixedly connected to the second knob 511. The second knob 511 is arranged at the proximal end of the first knob 411; a third groove 513 is provided on the outer peripheral side of the second rotating shaft 512, so that the second rotating shaft 512 forms an I-shaped structure. The second bayonet 416 at the proximal end of the first knob 411 is arranged within the range of the third groove 513. Through the mutual cooperation of the second buckle 416 and the third groove 513, when the user axially moves the second knob 511, the second knob 511 drives the second rotating shaft 512 to move axially, and then the second rotating shaft 512 drives the fixed rod 52 to move axially within the range of the third groove 513.

[0060] In this embodiment, the axial movement amplitude of the locking structure 4 is greater than the height of the locking structure in the prior art and greater than the axial movement amplitude of the fixed structure 5; that is, the range of the first groove 413 is greater than the height of the locking structure in the prior art, and the range of the first groove 413 is greater than the range of the third groove 513.

[0061] A usage method of a ventricular volume reduction force gauge in this embodiment is as follows:

[0062] Force measurement mode / process: Cut the tie rod length to a suitable position and insert it into the cavity space formed by the push tube and the locking tube. Make the distal end of the push tube abut against the near end face of the outer anchor in the left ventricular volume reduction device in the prior art. At the same time, push the locking knob and the fixed knob so that the locking tube and the fixed rod move towards the near end of the outer anchor, but it is necessary to avoid contacting any part of the outer anchor to affect the measurement error; when the measurement is completed in the push tube, wind the suture around the position of the fourth opening and bind it to the tie rod, then remove the force gauge, and then perform subsequent operations; as Figure 8 shown.

[0063] When locked: By pushing the fixing knob, the distal end of the fixing rod is driven to move axially along the thread, so that the distal end of the fixing rod protrudes from the distal end of the pushing tube and can be locked with the fixing structure in the left ventricular volume reduction device, thereby fixing the outer anchor of the left ventricular volume reduction device on the heart externally to achieve left ventricular volume reduction; as Figure 9 shown.

[0064] When dissociating: In the case where the position of the outer anchor is incorrect and it is necessary to change the position of the outer anchor or remove the outer anchor, by pushing the locking knob, the distal end of the locking tube is driven to move axially with the clamping boss, so that the distal end of the locking tube protrudes from the distal end of the pushing tube, and at this time the clamping boss is placed in the groove of the locking structure in the left ventricular volume reduction device; then by rotating the first knob, and further driving the distal end of the locking tube to rotate, the fixing structure is unlocked, and then the position of the outer anchor can be changed or the outer anchor can be removed; as Figure 9 shown.

[0065] When locking or unlocking the outer anchor, as long as the magnitude of the force gauge is kept constant, the compression force of the outer anchor on the heart can be made consistent during locking or unlocking. In this embodiment, by marking the position of the outer anchor relative to the tie rod with a suture, the compression force of the outer anchor on the heart can also be made consistent during locking or unlocking.

[0066] Embodiment 2

[0067] The difference between the ventricular volume reduction force gauge provided in this embodiment and that in Embodiment 1 is that:

[0068] The dissociation structure, the locking structure and the handle structure are assembled separately, which can realize the modular assembly of the force gauge and select appropriate functions according to needs.

[0069] Embodiment 3

[0070] The difference between the ventricular volume reduction force gauge provided in this embodiment and that in Embodiment 1 is that:

[0071] The distal end structures of the locking tube and the fixing rod are interchanged, or they are one or any combination of similar connection and interaction structures such as threaded joints, buckles, hooks, etc.

[0072] Embodiment 4

[0073] The difference between the ventricular volume reduction force gauge provided in this embodiment and that in Embodiment 1 is that:

[0074] The scale markings on the pushing tube are cancelled, a scale bar window is provided on the handle structure, and a pointer or similar structure is provided on the test tube, and the magnitude of the force is indicated by the pointer and the scale bar window.

[0075] Embodiment 5

[0076] The difference between the ventricular volume reduction force gauge provided in this embodiment and that in Embodiment 1 is that:

[0077] The distal structure of the locking tube is similar to the structure of a flat-tip screwdriver. Using only the locking tube, the locking or dissociation of the upper locking structure on the external anchor relative to the tie rod can be achieved.

[0078] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A ventricular volume reduction dynamometer, characterized in that, It includes a push tube, an elastic handle and a locking structure. A scale marking is provided on the outer periphery of the proximal end of the push tube, and the proximal end of the push tube is connected to the elastic handle; the push tube moves axially along the elastic handle. When the push tube is in a non-loaded state, the proximal end of the scale marking is flush with the distal end of the elastic handle. The locking structure passes through the elastic handle and can move axially along the push tube. The locking structure includes a locking knob and a locking tube fixedly connected to the distal end of the locking knob. A clamping boss for cooperating with an external locking structure is provided at the distal end of the locking tube, and the push tube is sleeved on the outer periphery of the locking tube. The elastic handle includes a hollow first housing and an elastic member located inside the first housing. The distal end of the elastic member abuts against the proximal end of the push tube. The locking knob includes a first knob at the proximal end, a first rotating shaft at the distal end, and a first groove located between the first knob and the first rotating shaft. A first buckle is provided at the proximal end of the elastic handle. The diameter of the first buckle is located between the first groove and the first knob, and the first groove can move axially along the elastic handle. A second housing is further provided at the proximal end of the first housing. A locking window is provided on the outer periphery of the second housing. A locking boss is provided on the outer periphery of the first rotating shaft, and the locking boss passes through the locking window to the outside of the elastic handle. The ventricular volume reduction dynamometer further includes a fixing structure. The fixing structure includes a fixing knob and a fixing rod fixedly connected to the distal end of the fixing knob. A thread is provided at the distal end of the fixing rod. The fixing rod passes through the locking tube and the first housing and can be threadedly connected to the locking structure. A stepped groove with a constricted proximal end is provided at the proximal end of the locking knob. A fixing ring matching with the constricted opening is provided on the outer periphery of the fixing knob. The constricted opening is engaged with the fixing ring to connect the locking knob and the fixing knob.

2. The ventricular volume reduction dynamometer according to claim 1, characterized in that, The diameter of the distal end of the push tube is larger than the maximum length between two points of the cross section of the locking structure. The distal end of the push tube can pass through a part of the outer periphery of the locking structure and abut against the outer anchor.

3. The ventricular volume reduction dynamometer according to claim 1, wherein, A pre-locking window is provided at the distal end of the push tube. After the push tube pushes the outer anchor to the target position, an external tether can horizontally pass through the pre-locking window, abut against the proximal end of the external locking structure and be fixedly connected to the tie rod to limit the axial position of the locking structure.

4. A ventricular volume reduction dynamometer according to claim 1, characterized in that, A baffle is provided at the proximal end of the push tube, and the baffle is located inside the elastic handle.

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