A pericardial traction retraction device for minimally invasive cardiac surgery

Abstract

The present application provides a pericardial traction exposure device for minimally invasive cardiac surgery, and relates to the technical field of medical devices, which comprises a dilatation ring and a traction assembly arranged on the dilatation ring. The dilatation ring is a deformable elastic ring structure, which can gently and uniformly expand the pericardial tissue after being inserted into the pericardial cavity. The number of traction assemblies is multiple, and they are uniformly arranged on the outer periphery of the dilatation ring along the circumference. The traction assemblies work together to provide more uniform and stable traction force for the pericardial tissue, effectively exposing the heart and providing a clearer surgical field for the surgeon, simplifying the surgical steps, reducing the operation complexity, and improving the overall efficiency and safety of the surgery. Moreover, the dilatation ring and the traction assembly of the present application do not need to be pulled out from the chest wall after traction of the pericardial tissue, avoiding additional surgical incisions and being beneficial to the postoperative recovery of the patient.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a pericardial traction exposure device for minimally invasive cardiac surgery. Background Technology

[0002] The human heart is surrounded by a tough, sac-like fibrous membrane called the pericardium, which completely encloses the heart.

[0003] In minimally invasive cardiac surgery, the pericardial cavity needs to be opened, and then the pericardial tissue is suspended to expose the heart. The surgery can be performed under direct vision through a small incision, or with the assistance of a thoracoscope, or entirely under thoracoscopy.

[0004] Currently, existing pericardial suspension techniques mainly use suspension sutures with needles. In minimally invasive surgery, the narrow surgical field makes the suspension operation difficult, increasing the risk of accidental cardiac injury and bleeding. Furthermore, a single suspension suture often fails to achieve the desired exposure, requiring multiple sutures. This not only increases the complexity and time of the procedure but also raises surgical risks. Moreover, the sutures exiting through the chest wall increase surgical incisions and trauma.

[0005] For example, patent number CN202221129542.5 discloses a non-invasive pericardial traction suspension device for coronary artery bypass grafting.

[0006] In view of this, the present invention is hereby proposed. Summary of the Invention

[0007] The purpose of this invention is to provide a pericardial traction exposure device for minimally invasive cardiac surgery, addressing the shortcomings of existing pericardial suspension devices, such as the risk of accidental cardiac injury and bleeding, the difficulty in achieving adequate exposure with a single suspension suture, the need for multiple sutures leading to cumbersome and complex procedures and increased surgical risks, and the increased surgical incision and trauma due to the need for the suspension sutures to pass through the chest wall. The numerous technical effects of the preferred solutions provided by this invention are detailed below.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] The present invention provides a pericardial traction and exposure device for minimally invasive cardiac surgery, comprising an expansion ring and traction components disposed on the expansion ring. The expansion ring is a deformable elastic ring structure. The traction components are multiple sets and are evenly arranged on the outer periphery of the expansion ring along its circumference for traction of pericardial tissue and exposure of the heart.

[0010] Preferably, the traction assembly includes two traction antennae, which are symmetrically arranged about the radial extension line of the expansion ring.

[0011] Preferably, the included angle between the two traction antennae is 40°-50°.

[0012] Preferably, the corners of the traction antennae are rounded.

[0013] Preferably, the diameter of the expansion ring is 4-8 cm.

[0014] Preferably, a traction adjustment line is provided on the outer periphery of the expansion ring for adjusting the position and orientation of the expansion ring.

[0015] Preferably, the length of the traction line is 15cm-25cm.

[0016] Preferably, the device further includes a transmission mechanism, which includes a transmission cylinder and a push rod. The transmission cylinder has a sliding cavity with openings at both ends. A storage position is provided at the first end of the sliding cavity for storing an expansion ring in a compressed state. The push rod is inserted from the second end of the sliding cavity and fits tightly with the sliding cavity. An external force drives the push rod to move along the sliding cavity to drive the expansion ring out of the storage position.

[0017] Preferably, the transmission mechanism further includes a reset component, which is connected to the transmission cylinder and the push rod respectively, for limiting the displacement range of the push rod, and driving the push rod to return to its original position after the push rod completes the pushing action.

[0018] Preferably, the outer wall surface of the transmission cylinder is provided with an anti-slip component.

[0019] The preferred technical solution of the present invention can also produce at least the following technical effects:

[0020] This invention effectively avoids the defects of existing pericardial suspension devices, such as the risk of accidental cardiac injury leading to bleeding, the difficulty of achieving good exposure with a single suspension suture, the need for multiple sutures resulting in cumbersome and complex surgical procedures and increased surgical risks, and the increased surgical incision and trauma caused by the suspension sutures needing to pass through the chest wall. This invention provides a pericardial traction and exposure device for minimally invasive cardiac surgery, including an expansion ring and traction components disposed on the expansion ring. The expansion ring is a deformable elastic ring structure, and multiple sets of traction components are evenly arranged along the circumference of the expansion ring on its outer periphery for traction of pericardial tissue and exposure of the heart. This invention employs an integrated design of the expansion ring and traction components. The expansion ring, being a deformable elastic ring structure, adaptively and gently expands the pericardial tissue evenly and uniformly after insertion into the pericardial cavity. Simultaneously, the multiple traction components work synergistically to provide a more uniform and stable traction force to the pericardial tissue, effectively exposing the heart, providing the surgeon with a clearer surgical field, simplifying surgical procedures, reducing operational complexity, and improving the overall efficiency and safety of the surgery. Moreover, the expansion ring and traction assembly of the present invention do not need to pass through the chest wall after traction of the pericardial tissue, avoiding additional surgical incisions and trauma, which is beneficial to the patient's postoperative recovery. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the pericardial traction exposure device for minimally invasive cardiac surgery provided by the present invention;

[0023] Figure 2 yes Figure 1 This is a schematic diagram of the transmission mechanism of a pericardial traction exposure device for minimally invasive cardiac surgery provided by the present invention in an unpushed state;

[0024] Figure 3 This is a schematic diagram of the transmission mechanism of a pericardial traction exposure device for minimally invasive cardiac surgery provided by the present invention in the pushing state.

[0025] In the picture:

[0026] 1. Expansion ring; 2. Traction assembly; 21. Traction antenna; 3. Traction adjustment line; 4. Transmission cylinder; 41. Slide cavity; 411. Storage position; 5. Push rod; 6. Anti-slip protrusion; 7. Spring return component. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0028] like Figure 1 As shown, the present invention provides a pericardial traction and exposure device for minimally invasive cardiac surgery, including an expansion ring 1 and traction components 2 disposed on the expansion ring 1. The expansion ring 1 is a deformable elastic ring structure. The traction components 2 are multiple sets and are evenly arranged on the outer periphery of the expansion ring 1 in the circumferential direction for traction of pericardial tissue and exposure of the heart.

[0029] The invention employs an integrated design of an expansion ring 1 and a traction component 2. The expansion ring 1 is a deformable, elastic circular structure that adaptively and gently expands the pericardial tissue after insertion into the pericardial cavity. Simultaneously, several traction components 2 work synergistically to provide a more uniform and stable traction force to the pericardial tissue, effectively exposing the heart and achieving a traction effect on the pericardial tissue. This provides the surgeon with a clearer surgical field, simplifies surgical procedures, reduces operational complexity, and improves the overall efficiency and safety of the surgery. Moreover, the expansion ring 1 and traction component 2 of this invention do not need to protrude from the chest wall after traction of the pericardial tissue, avoiding additional surgical incisions and trauma, which is beneficial for the patient's postoperative recovery.

[0030] As an optional implementation, the traction assembly 2 includes two traction antennae 21, which are symmetrically arranged about the radial extension line of the expansion ring 1.

[0031] This configuration ensures that when the traction component 2 applies traction force to the pericardial tissue, it maintains high uniformity and stability, resulting in uniform force distribution on the pericardial tissue.

[0032] Through the synergistic effect of the expansion ring 1 and the traction component 2, a more uniform and stable traction force is provided to the pericardial tissue, so as to effectively expose the heart, achieve the traction effect on the pericardial tissue, and provide doctors with a clearer surgical field.

[0033] As an optional implementation, the included angle between the two traction antennae 21 is 40°-50°.

[0034] The angle between the traction antennae 21 can be set according to specific surgical needs to adapt to different patients and surgical requirements.

[0035] Furthermore, the angle between the two traction antennae 21 is 45°. This setting ensures that the traction component 2 reduces excessive traction on the pericardial tissue while maintaining the traction effect, thereby further improving the safety of the operation and the patient's comfort.

[0036] As an alternative implementation, the corners of the traction antennae 21 are rounded.

[0037] Furthermore, the traction antenna 21 has a cylindrical structure with smooth transitions at the edges and corners.

[0038] The traction antenna 21 has a cylindrical structure to ensure good stability and provide stable support and traction for the pericardial tissue.

[0039] The rounded edges of the traction antenna 21 make it gentler when contacting the pericardial tissue, avoiding the risk of trauma and bleeding that sharp edges may cause.

[0040] As an alternative implementation, the diameter of the expansion ring 1 is 4-8 cm.

[0041] The diameter of the expansion ring 1 can be set according to specific surgical needs to accommodate different patients and surgical requirements.

[0042] Furthermore, the diameter of the expansion ring 1 is preferably 6 cm.

[0043] This setup ensures sufficient space for expansion, effectively exposing the heart and allowing doctors to clearly see the surgical area, while reducing excessive traction on the pericardial tissue.

[0044] The expansion ring 1 is preferably made of medical-grade silicone, which has good elasticity and flexibility. These properties allow the expansion ring 1 to be easily compressed to a smaller volume and placed in the storage position 411 during the surgical preparation stage. Then, during the operation, when the expansion ring 1 is released into the pericardial cavity, it can quickly and adaptively restore its shape to fit pericardial cavities of different shapes and sizes. At the same time, the traction antenna 21 in the traction component 2 works in conjunction with the expansion ring 1 to provide stable and uniform traction force to the pericardial tissue, effectively exposing the heart and providing the necessary expansion space for the operation.

[0045] Even when subjected to external pressures such as pericardial tissue during surgery, the dilation ring 1 can flexibly adapt to and resist external pressures through its own elastic deformation ability and the auxiliary support of the traction antenna 21, maintaining sufficient traction and stability.

[0046] As an optional implementation, a traction adjustment line 3 is provided on the outer periphery of the expansion ring 1 to adjust the position and orientation of the expansion ring 1.

[0047] Furthermore, there are two traction adjustment lines 3, symmetrically arranged on the expansion ring 1.

[0048] During the surgery, the doctor can use medical instruments such as forceps to hold the traction adjustment line 3, and pull the two traction adjustment lines 3 simultaneously or separately according to the needs of the surgery to make fine adjustments to the position and posture of the expansion ring 1 in order to achieve the best surgical results.

[0049] As an optional implementation, the length of the traction line is 15cm-25cm.

[0050] The length of the traction suture can be set according to specific surgical needs to accommodate different patients and surgical requirements.

[0051] Furthermore, the length of the traction line is preferably 20cm.

[0052] As an optional implementation, a transmission mechanism is also included, which includes a transmission cylinder 4 and a push rod 5. The transmission cylinder 4 has a sliding cavity 41 with openings at both ends. A storage position 411 is provided at the first end of the sliding cavity 41 for storing the expansion ring 1 in a compressed state. The push rod 5 is inserted from the second end of the sliding cavity 41 and is interference-fitted with the sliding cavity 41. An external force drives the push rod 5 to move along the sliding cavity 41 to drive the expansion ring 1 out of the storage position 411.

[0053] Furthermore, the transfer tube 4 is 30cm long, so that the doctor can easily insert the transfer tube 4 into the patient's chest cavity and reach the predetermined surgical position.

[0054] The edges of the transfer tube 4 are rounded to avoid the risk of injury and bleeding that sharp edges may cause.

[0055] The inner diameter of the sliding cavity 41 is 1cm, which ensures the stability of the expansion ring 1 in the storage position 411 and facilitates the smooth movement of the push rod 5.

[0056] The expansion ring 1 is manually driven to undergo elastic deformation and reduce its volume, and is then placed in the storage position 411 of the transfer cylinder 4. The outward expansion tension generated by the compressed expansion ring 1 exerts an interaction force on the inner wall of the storage position 411, causing the expansion ring 1 to fit tightly against the storage position 411. Without external force, the expansion ring 1 can be completely and stably embedded within the storage position 411.

[0057] The push rod 5 is interference-fitted with the slide cavity 41 to ensure the stability and accuracy of the push rod 5 during movement. When the push rod 5 is pushed toward the storage position 411, compressing the space of the storage position 411 and driving the drive ring to disengage from the storage position 411, the second end of the push rod 5 is still located in the slide cavity 41.

[0058] As an optional implementation, such as Figure 2 , 3As shown, the transmission mechanism also includes a reset component, which is connected to the transmission cylinder 4 and the push rod 5 respectively. The reset component is used to limit the displacement range of the push rod 5 and drive the push rod 5 back to its original position after the push rod 5 completes the pushing action.

[0059] Furthermore, the reset assembly includes a reset structure in the prior art, such as a spring reset member 7 or a pneumatic reset member.

[0060] The reset assembly preferably uses a spring reset member 7, one end of which is connected to the end face of the second end of the transmission cylinder 4, and the other end is connected to the push rod 5.

[0061] The spring reset component 7 allows the push rod 5 to move within a predetermined stroke, and it can also automatically return to its original position after the push rod 5 completes the pushing action, waiting for the next pushing action.

[0062] As an optional implementation, an anti-slip component is provided on the outer wall surface of the transmission cylinder 4.

[0063] Furthermore, the anti-slip component includes anti-slip protrusions 6, which are arranged in a specific pattern on the outer wall surface of the second end of the transmission cylinder 4. These protrusions increase friction with the doctor's hand, improve grip stability, and prevent slippage.

[0064] The handle of the push rod 5 can also be equipped with anti-slip protrusions 6 to increase friction with the doctor's hand and improve grip stability.

[0065] The present invention provides a method for using a pericardial traction exposure device for minimally invasive cardiac surgery, comprising the following steps:

[0066] S1. Place the compressed expansion ring 1 in the storage position 411 of the transfer tube 4, and send the transfer tube 4 into the patient's chest cavity until it reaches the predetermined position;

[0067] S2. The doctor manually pushes the push rod 5 along the slide cavity 41, causing the dilation ring 1 to leave the storage position 411 and enter the pericardial cavity;

[0068] S3. The expansion ring 1 uses its elasticity to adaptively restore its shape within the pericardial cavity. During the restoration process, it gently and evenly expands the pericardial tissue. At the same time, it works in conjunction with the traction component 2 located on the expansion ring 1. The traction antenna 21 provides stable and uniform traction force to the pericardial tissue, effectively exposing the heart and providing the doctor with a clear surgical field.

[0069] S4. The doctor uses forceps and other medical instruments to clamp and pull the traction adjustment line 3 according to the needs of the surgery, and makes fine adjustments to the position and posture of the dilation ring 1 so that the doctor's surgical field is always kept in the best state, so as to perform the surgical operation efficiently and accurately.

[0070] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0071] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0072] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "a particular example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0074] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A pericardial traction exposure device for minimally invasive cardiac surgery, characterized in that, The device includes an expansion ring and traction components disposed on the expansion ring. The expansion ring is a deformable elastic ring structure. The traction components are multiple sets and are evenly arranged on the outer periphery of the expansion ring along its circumference for traction of pericardial tissue to expose the heart. Traction adjustment lines are provided on the outer periphery of the expansion ring for adjusting the position and orientation of the expansion ring. The traction components include two traction antennae, which are symmetrically arranged about the radial extension line of the expansion ring.

2. The pericardial traction exposure device for minimally invasive cardiac surgery according to claim 1, characterized in that, The included angle between the two traction antennae is 40°-50°.

3. The pericardial traction exposure device for minimally invasive cardiac surgery according to claim 1, characterized in that, The edges of the traction antennae are rounded.

4. The pericardial traction exposure device for minimally invasive cardiac surgery according to claim 1, characterized in that, The diameter of the expansion ring is 4-8 cm.

5. A pericardial traction exposure device for minimally invasive cardiac surgery according to claim 1, characterized in that, The length of the traction adjustment line is 15cm-25cm.

6. The pericardial traction exposure device for minimally invasive cardiac surgery according to claim 1, characterized in that, It also includes a transmission mechanism, which includes a transmission cylinder and a push rod. The transmission cylinder has a sliding cavity with openings at both ends. A storage position is provided at the first end of the sliding cavity for storing an expansion ring in a compressed state. The push rod is inserted from the second end of the sliding cavity and fits tightly with the sliding cavity. An external force drives the push rod to move along the sliding cavity to drive the expansion ring away from the storage position.

7. A pericardial traction exposure device for minimally invasive cardiac surgery according to claim 6, characterized in that, The transmission mechanism further includes a reset component, which is connected to the transmission cylinder and the push rod respectively. The reset component is used to limit the displacement range of the push rod and drive the push rod to return to its original position after the push rod completes the pushing action.

8. A pericardial traction exposure device for minimally invasive cardiac surgery according to claim 6, characterized in that, The outer wall surface of the transmission cylinder is provided with anti-slip components.

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