Intubation propelling device for cardiovascular surgery in cardiac surgery department

Abstract

The invention relates to the technical field of surgical instruments, in particular to an intubation propelling device for cardiovascular surgery in the cardiac surgery department. The cannula propelling device for the cardiovascular surgery in the cardiac surgery department comprises a propelling cylinder and a cannula body, and a propelling assembly for propelling the cannula body is erected on the outer portion of the propelling cylinder; the propelling assembly comprises two mounting plates, the two mounting plates are symmetrically distributed, a plurality of evenly-distributed connecting rods are rotationally mounted between the two mounting plates, and the outer walls of the connecting rods on the same side are each sleeved with two mounting strips which are symmetrically distributed and movably connected. And rotationally connected driving rods are erected between the mounting strips on the two sides of the same horizontal position. According to the intubation propelling device for the cardiovascular surgery in the cardiac surgery department, through friction between the conveying belt and the intubation body, the intubation can be stably pushed, so that a doctor can stably conduct intubation operation, and the operation difficulty of the doctor is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of surgical instruments, in particular to a catheter pushing device for cardiovascular surgery in cardiac surgery. BACKGROUND

[0002] Cardiac surgery includes the diseases of cardiac surgery and general thoracic surgery, and studies the aspects of heart and great vessel trauma, pericardial disease, congenital heart disease, acquired heart valve disease, ischemic heart disease, heart tumor, great vessel disease, interventional therapy technology, surgical treatment of arrhythmia, cardiac pacing and implantable defibrillator, dynamic cardiomyoplasty, heart, lung and heart-lung transplantation, etc. During cardiovascular surgery, a catheter is needed, which is inserted into the human body through the orifice on the surface and in the body to input and suck out gas or liquid. A corresponding pushing device is needed when the catheter is inserted.

[0003] During the operation of the catheter, the doctor holds the catheter to insert it from the surgical incision, and this operation of the catheter pushing device requires relatively high requirements for the doctor, thereby increasing the operation difficulty of the doctor.

[0004] Therefore, it is necessary to provide a new catheter pushing device for cardiovascular surgery in cardiac surgery to solve the above technical problems. SUMMARY

[0005] To solve the above technical problems, the present application provides a catheter pushing device for cardiovascular surgery in cardiac surgery.

[0006] The catheter pushing device for cardiovascular surgery in cardiac surgery provided by the present application comprises a pushing cylinder and a catheter body, and the pushing cylinder is externally provided with a pushing assembly for pushing the catheter body.

[0007] The pushing assembly comprises two mounting plates which are symmetrically distributed, a plurality of uniformly distributed connecting rods which are rotatably installed between the two mounting plates, two symmetrically distributed and movably connected mounting strips which are sleeved on the outer walls of the connecting rods on the same side, a driving rod which is rotatably connected between the mounting strips on the same horizontal position, and a conveying belt which is sleeved between the two driving rods on the same horizontal position and is used for pushing the catheter body.

[0008] The outer wall of one of the connecting rods is threadedly connected with the corresponding mounting strip, the thread directions of the thread structures on the two sides are opposite, and the outer wall of one of the remaining connecting rods is provided with a scale bar.

[0009] The outer wall of the driving rod is sleeved with a fixedly connected gear, the inside of the conveying belt is fixedly installed with a plurality of uniformly distributed linkage teeth, and the linkage teeth are meshingly connected with the gear.

[0010] The outer part of the mounting strip is provided with a driving assembly for driving the advancing assembly.

[0011] Preferably, the driving assembly comprises a fixing frame fixedly mounted on the outer wall of the mounting strip, a linkage shaft rotatably connected in the fixing frame, and the end of the linkage shaft is fixedly connected with the end of the corresponding driving rod in the mounting strip.

[0012] Preferably, the inner part of the fixing frame is provided with a rotating shaft rotatably connected, a worm fixedly connected on the outer wall of the rotating shaft, a worm gear meshingly connected on the outer part of the worm, and the worm gear is fixedly sleeved on the outer wall of the linkage shaft.

[0013] Preferably, the fixing frame is provided with a holding frame fixedly connected, a holding rod slidingly connected in the inner part of the holding frame, a limiting half ring fixedly mounted on the holding rod, a limiting spring arranged between the holding rod and the holding frame, one end of the limiting spring is fixedly connected with the corresponding limiting half ring, and the other end of the limiting spring is fixedly connected with the holding frame.

[0014] Preferably, the outer wall of the rotating shaft is fixedly mounted with a limiting wheel, the position of the limiting wheel is opposite to the position of the limiting half ring, the outer wall of the limiting wheel is in abutment with the inner wall of the limiting half ring, and the outer wall of the limiting wheel and the inner wall of the limiting half ring are both provided with a plurality of anti-skid convex points, and one end of the rotating shaft extends to the outer part of the fixing frame and is provided with a driving roller fixedly connected.

[0015] Preferably, the bottom of the advancing cylinder is provided with a support frame fixedly connected, one end of the advancing cylinder is fixedly mounted with symmetrically distributed adapter strips, and the outer wall of the two adapter strips is respectively fixedly connected with the corresponding mounting plate.

[0016] Preferably, the inner part of the advancing cylinder is provided with a guiding assembly for guiding the advancing of the cannula body, the guiding assembly comprises a support sheet, the support sheet is provided with four groups, each group of the support sheet comprises two, and the four groups of the support sheet are symmetrically distributed two by two with the center of the advancing cylinder.

[0017] Preferably, a plurality of guiding wheels rotatably connected are arranged between the two support sheets in the same group, and the outer wall of the guiding wheel is in abutment with the outer wall of the cannula body.

[0018] Preferably, the two ends of the two support sheets in the same group are provided with the same fixedly connected connecting blocks, the outer part of the connecting block on one side is provided with an adjusting rod rotatably connected, the end of the adjusting rod extends to the outer part of the advancing cylinder, and the outer wall of the adjusting rod is threadedly connected with the inner wall of the advancing cylinder.

[0019] Preferably, the outer wall of the connecting block on the other side is provided with a fixedly connected guide rod, the end of the guide rod extends to the outer wall of the advancing cylinder, the outer wall of the guide rod abuts and slidably connects with the inner wall of the advancing cylinder, and the outer wall of the guide rod is provided with a scale bar.

[0020] Compared with the related art, the intubation advancing device for cardiovascular surgery in the present application has the following beneficial effects:

[0021] 1、The advancing assembly is arranged, in use, the doctor inserts the intubation body into the device, drives the drive roller by pulling, drives the conveying belt in the advancing assembly to rotate, and the intubation body is stably pushed through the friction between the conveying belt and the intubation body, so that the doctor can stably perform the intubation operation, and the operation difficulty of the doctor is reduced.

[0022] 2、In the operation gap of the intubation, the doctor releases the drive of the drive roller, the self-locking property of the worm gear and the worm and the extrusion of the limiting wheel and the limiting half ring abut, and the self-operation is realized, so that the phenomenon of random displacement of the intubation body in the operation gap is avoided, and therefore the stability of the device in use is further improved.

[0023] 3、The movable erection of the plurality of support pieces in the guide assembly, in use, the doctor can adjust the gap between the two support pieces in the same group according to the specification of the intubation body, so that the guide wheel on the support piece abuts against the outer wall of the intubation body smoothly, so that the guide wheel can guide the intubation body during the movement of the intubation body, and the application range of the guide assembly is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A structure schematic view of a preferred embodiment of the intubation advancing device for cardiovascular surgery in the present application is shown in the figure.

[0025] Figure 2 A structure schematic view of a preferred embodiment of the intubation advancing device for cardiovascular surgery in the present application is shown in the figure. Figure 1 A structure schematic view of a preferred embodiment of the intubation advancing device for cardiovascular surgery in the present application is shown in the figure.

[0026] Figure 3 A structure schematic view of a preferred embodiment of the intubation advancing device for cardiovascular surgery in the present application is shown in the figure. Figure 2 A structure schematic view of a preferred embodiment of the intubation advancing device for cardiovascular surgery in the present application is shown in the figure.

[0027] Figure 4 A structure schematic view of a preferred embodiment of the intubation advancing device for cardiovascular surgery in the present application is shown in the figure. Figure 2 A structure schematic view of a preferred embodiment of the intubation advancing device for cardiovascular surgery in the present application is shown in the figure.

[0028] Figure 5 A structure schematic view of a preferred embodiment of the intubation advancing device for cardiovascular surgery in the present application is shown in the figure. Figure 1 A structure schematic view of a preferred embodiment of the intubation advancing device for cardiovascular surgery in the present application is shown in the figure.

[0029] Figure 6 As shown in the structural schematic view of the guiding assembly; Figure 5

[0030] Figure 7 As shown in the sectional structural schematic view of the pushing barrel. Figure 5

[0031] Reference numerals in the drawings: 1, pushing barrel; 11, support frame; 12, adapter strip; 2, pushing assembly; 21, mounting plate; 211, connecting rod; 22, mounting strip; 221, driving rod; 222, gear; 23, conveying belt; 231, linkage tooth; 3, guiding assembly; 31, support sheet; 311, guiding wheel; 312, connecting block; 32, adjusting rod; 33, guiding rod; 4, cannula body; 5, driving assembly; 51, fixed frame; 511, linkage shaft; 512, worm gear; 52, holding frame; 521, holding rod; 522, limiting half ring; 523, limiting spring; 53, rotating shaft; 531, limiting wheel; 532, worm; 54, driving roller. DETAILED DESCRIPTION

[0032] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0033] The specific implementation of the present application is described in detail below in conjunction with specific embodiments.

[0034] Please refer to Figures 1 to 7 The present application provides a kind of cannula pushing device for cardiovascular surgery of heart surgery, and the cannula pushing device for cardiovascular surgery of heart surgery includes: pushing barrel 1 and cannula body 4, the external frame of pushing barrel 1 is pushed to the pushing assembly 2 of cannula body 4.

[0035] In the embodiments of the present application, please refer to Figures 1 to 7 ​​The pushing assembly 2 comprises mounting plates 21 provided with a plurality of uniformly distributed connecting rods 211 rotatably mounted between the two mounting plates 21, outer walls of connecting rods 211 on the same side are each sleeved with two symmetrically distributed and movably connected mounting strips 22, mounting strips 22 on both sides of the same horizontal position are each provided with a rotatably connected driving rod 221, and two driving rods 221 at the same horizontal position are each sleeved with a conveying belt 23 for pushing the cannula body 4; the outer wall of one of the connecting rods 211 is threadedly connected between the corresponding mounting strip 22, the thread directions of the thread structures on both sides are opposite, and the outer wall of one of the remaining connecting rods 211 is provided with a scale strip; the outer wall of the driving rod 221 is sleeved with a fixedly connected gear 222, the inside of the conveying belt 23 is fixedly provided with a plurality of uniformly distributed linkage teeth 231, and the linkage teeth 231 and the gear 222 are in meshing connection, the outside of the mounting strip 22 is provided with a driving assembly 5 for driving the pushing assembly 2, the driving assembly 5 comprises a fixed frame 51 fixedly mounted on the outer wall of the mounting strip 22, a linkage shaft 511 rotatably mounted in the fixed frame 51, and the end of the linkage shaft 511 is fixedly connected with the end of the corresponding driving rod 221 of the mounting strip 22, a rotating shaft 53 rotatably mounted in the fixed frame 51, a fixedly connected worm 532 sleeved on the outer wall of the rotating shaft 53, a meshingly connected worm gear 512 provided on the outside of the worm 532 and fixedly sleeved on the outer wall of the linkage shaft 511, a fixedly connected holding frame 52 mounted on the fixed frame 51, a slidingly connected holding rod 521 inserted into the inside of the holding frame 52, a limiting half ring 522 fixedly mounted on the holding rod 521, a limiting spring 523 arranged between the holding rod 521 and the holding frame 52, one end of the limiting spring 523 being fixedly connected with the corresponding limiting half ring 522 and the other end of the limiting spring 523 being fixedly connected with the holding frame 52, a limiting wheel 531 fixedly mounted on the outer wall of the rotating shaft 53, the position of the limiting wheel 531 being opposite to the position of the limiting half ring 522, the outer wall of the limiting wheel 531 abutting against the inner wall of the limiting half ring 522, and the outer wall of the limiting wheel 531 and the inner wall of the limiting half ring 522 are each provided with a plurality of anti-slip protrusions, and one end of the rotating shaft 53 extends to the outside of the fixed frame 51 and is provided with a fixedly connected driving roller 54.

[0036] It should be noted that, in use, the doctor can control the rotation of the connecting rod 211 as needed, at which time the rotating connecting rod 211 can drive the mounting strips 22 on both sides to move relative to each other through the thread structures with opposite thread directions on the outer walls, thereby synchronously moving the conveying belt 23 inside, until the outer walls of the conveying belts 23 on the upper and lower sides abut against the outer wall of the cannula body 4, thereby completing the adjustment of the position of the conveying belt 23, so that the conveying belt 23 can abut against the outer wall of the cannula body 4 of different specifications, thereby improving the application range of the device in the later stage;

[0037] It should be noted that: in the process of adjustment of the conveying belt 23, during use, when the doctor holds the holding frame 52 and the holding rod 521, the end limiting half ring 522 can be driven to move synchronously through the holding rod 521, so that the limiting half ring 522 can be separated from the limiting wheel 531 on the rotating shaft 53 to release the limiting of the rotating shaft 53, and then the thumb can be used to push the drive roller 54 on the outside to control the rotation of the rotating shaft 53. The rotating shaft 53 can drive the connecting shaft 511 to rotate synchronously through the meshing of the external worm 532 and the worm wheel 512, so that the connecting shaft 511 drives the drive rod 221 and the corresponding conveying belt 23 connected thereto to rotate, and the conveying belt 23 rotates and drives the cannula body 4 to move through the friction force when it is in contact with the cannula body 4. In this process, the guide wheel 311 in the advancing cylinder 1 and the guide assembly 3 in contact with the outer wall of the cannula body 4 can guide the movement of the cannula body 4, so that the cannula body 4 can be stably advanced and inserted.

[0038] When the doctor releases the holding of the holding rod 521, the limiting spring 523 can drive the holding rod 521 to move towards the rotating shaft 53 through its own force, so that the limiting half ring 522 on the holding rod 521 is in contact with the outer wall of the limiting wheel 531 on the rotating shaft 53. Through the combination of the friction force of the two and the self-locking characteristics of the worm wheel 512 and the worm 532, the conveying belt 23 can be prevented from rotating randomly, and the cannula body 4 can be prevented from moving synchronously, thereby improving the stability of the cannula body 4 during the advancing process.

[0039] In the embodiment of the application, please refer to Figures 1 to 7 The bottom of the advancing cylinder 1 is provided with a fixedly connected support frame 11, and one end of the advancing cylinder 1 is fixedly provided with symmetrically distributed adapter strips 12, and the outer walls of the two adapter strips 12 are respectively fixedly connected with corresponding mounting plates 21.

[0040] It should be noted that: through the fixed connection of the adapter strip 12 and the mounting piece, the advancing assembly 2 and the advancing cylinder 1 can be fixedly connected, so that they form an integrated structure, thereby making the use of the device more flexible and convenient in the later stage, and through the erection of the support frame 11, the device can be fixedly installed on the external support according to the needs during use, thereby stably supporting the device by the external support.

[0041] In the embodiment of the application, please refer to Figures 1 to 7The inside of the advancing cylinder 1 is provided with a guide assembly 3 for guiding the advancement of the cannula body 4, the guide assembly 3 comprises support plates 31, each of the support plates 31 is provided with four groups, each group of the support plates 31 comprises two support plates 31, and the four groups of the support plates 31 are symmetrically distributed in pairs with the center of the advancing cylinder 1, a plurality of rotatingly connected guide wheels 311 are arranged between the two support plates 31 in the same group, and the outer wall of the guide wheel 311 abuts against the outer wall of the cannula body 4, both ends of the two support plates 31 in the same group are provided with a same fixedly connected connecting block 312, a rotatingly connected adjusting rod 32 is mounted on the outer wall of one side connecting block 312, the end of the adjusting rod 32 extends to the outside of the advancing cylinder 1, and the outer wall of the adjusting rod 32 is threadedly connected with the inner wall of the advancing cylinder 1, a fixedly connected guide rod 33 is arranged on the outer wall of the other side connecting block 312, the end of the guide rod 33 extends to the outer wall of the advancing cylinder 1, the outer wall of the guide rod 33 abuts against and slidably connects with the inner wall of the advancing cylinder 1, and a scale strip is arranged on the outer wall of the guide rod 33.

[0042] It should be noted that: by movably arranging the support plates 31, medical staff can control the rotating of the adjusting rod 32 according to the specifications of the cannula body 4 during use, and the rotating adjusting rod 32 can move spirally in the inside of the advancing cylinder 1 through the threaded structure, in this process, the guide rod 33 can limit the support plates 31, so that the support plates 31 cannot rotate synchronously with the adjusting rod 32 during the rotation of the adjusting rod 32, and thus the driving force of the adjusting rod 32 can be changed into the driving force of the support plates 31, so that the driving force can move stably in the inside of the advancing cylinder 1, and the staff can accurately control the distance of the adjusting of the support plates 31 through the scale on the guide rod 33 during this process.

[0043] And by moving the support plates 31, the guide wheels 311 located in the inside of the support plates 31 can move synchronously, when the outer wall of the guide wheels 311 abuts against the outer wall of the cannula body 4, the guide assembly 3 can guide the moving cannula body 4 when the advancing assembly 2 drives the cannula body 4, so that the cannula body 4 can be stably advanced.

[0044] The working principle of the cannula advancing device for cardiovascular surgery in cardiac surgery provided by the application is as follows:

[0045] When the device is used, the doctor can first insert the required cannula body 4 into the device, and then control the rotating of the adjusting rod 32 in the guide assembly 3 according to the needs, and the rotating adjusting rod 32 can move spirally in the inside of the advancing cylinder 1 through the threaded structure.

[0046] In this process, since the end of the adjusting rod 32 is rotationally connected with the corresponding supporting sheet 31, the screw moving adjusting rod 32 can drive the corresponding supporting sheet 31 to move in the inside of the advancing barrel 1 through the guide rod 33, so as to adjust the distance between the adjacent two supporting sheets 31 and the inside guide wheels 311, and thus the outer wall of the guide wheel 311 can abut against the outer wall of the cannula;

[0047] After the adjustment of the position of the guide wheel 311 is completed, the connecting rod 211 which is threadedly connected with the mounting strip 22 can be controlled to rotate according to the requirement, at this time, the rotating connecting rod 211 can drive the two mounting strips 22 on the both sides to move relatively through the thread structure with opposite directions on the both sides, so as to drive the inside conveying belt 23 to move synchronously, until the outer wall of the conveying belt 23 on the both sides abut against the outer wall of the cannula body 4, that is, the adjustment of the position of the conveying belt 23 is completed;

[0048] At this time, the doctor can hold the holding frame 52 and the holding rod 521 in the driving assembly 5, the holding force can drive the holding rod 521 to move in the holding frame 52 away from the rotating shaft 53, so as to drive the end limiting half ring 522 to move synchronously, so that the limiting half ring 522 is separated from the limiting wheel 531 on the rotating shaft 53 to release the limiting of the rotating shaft 53;

[0049] Then the thumb can be used to push the driving roller 54 on the outside to control the driving roller 54 to rotate, the rotating driving roller 54 can drive the rotating shaft 53 to rotate, and the rotating rotating shaft 53 can drive the outside worm 532 to rotate synchronously, at this time, the rotating worm 532 can drive the connecting shaft 511 to rotate synchronously through the meshing with the outside worm wheel 512, at this time, the rotating connecting shaft 511 can drive the driving rod 221 connected therewith to rotate, and the rotating driving rod 221 can drive the corresponding conveying belt 23 to rotate through the meshing of the gear 222 on the outer wall with the plurality of linkage teeth 231;

[0050] The rotating conveying belt 23 can drive the cannula body 4 to move through the friction force when abutting against the cannula body 4, in this process, the guide wheel 311 in the guide assembly 3 which abuts against the outer wall of the cannula body 4 in the advancing barrel 1 can guide the moving cannula body 4, so as to make the cannula body 4 stably advance and insert;

[0051] When the doctor loosens the holding of the holding rod 521 in the operation gap, the limiting spring 523 can drive the holding rod 521 to move towards the direction of the rotating shaft 53 by the action force of the limiting spring 523, so that the limiting half ring 522 on the holding rod 521 is in abutment with the outer wall of the limiting wheel 531 on the rotating shaft 53, and through the combination of the friction force of the abutment and the self-locking characteristics of the worm wheel 512 and the worm 532, the phenomenon that the cannula body 4 is synchronously moved can be avoided, and the stability of the cannula body 4 in the process of advancing the cannula can be improved.

[0052] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent flow transformation made by using the content of the specification and the drawings, or directly or indirectly applied to other related technical fields, is also included in the patent protection range of the present application.

Claims

1. A cannulation advancement device for cardiovascular surgery in cardiac surgery, characterized in that, The utility model relates to a kind of pusher and cannula body, the exterior of the pusher (1) is provided with the pusher assembly (2) of the pusher of cannula body (4);The pusher assembly (2) includes mounting plate (21), the mounting plate (21) is provided with two and symmetrically distributed, a plurality of uniformly distributed connecting rods (211) are rotatably installed between two mounting plate (21), the outer wall of same side connecting rod (211) is all set with two symmetrically distributed and movably connected mounting strip (22), drive rod (221) is set between the mounting strip (22) of both sides in the same horizontal position, and the drive rod (221) of two between the same horizontal position is all set with the conveying belt (23) of the pusher of cannula body (4);The outer wall of one of the connecting rod (211) is threadedly connected between corresponding mounting strip (22), the thread direction of two side screw thread structure is opposite, and the outer wall of one connecting rod (211) in the rest connecting rod (211) is provided with scale bar;The outer wall of drive rod (221) is set with fixedly connected gear (222), the inside of conveying belt (23) is fixedly installed with a plurality of uniformly distributed linkage teeth (231), and the linkage teeth (231) and gear (222) are engagedly connected;The outside of mounting strip (22) is set with the drive assembly (5) of the pusher assembly (2) for driving. The drive assembly (5) includes fixed frame (51), the fixed frame (51) is fixedly installed on the outer wall of mounting strip (22), the inside of fixed frame (51) is installed with rotatably connected linkage shaft (511), and the end of linkage shaft (511) and the end of corresponding drive rod (221) in mounting strip (22) are fixedly connected. The inside of fixed frame (51) is set with rotatably connected rotating shaft (53), the outer wall of rotating shaft (53) is set with fixedly connected worm (532), the outside of worm (532) is provided with meshingly connected worm wheel (512), and the worm wheel (512) is fixedly set on the outer wall of linkage shaft (511). The fixedly connected holding frame (52) is installed on the fixed frame (51), the slidingly connected holding rod (521) is inserted in the inside of holding frame (52), the limit half ring (522) is fixedly installed on the holding rod (521), the limit spring (523) is set between the holding rod (521) and holding frame (52), one end of limit spring (523) and corresponding limit half ring (522) are fixedly connected, and the other end of limit spring (523) and holding frame (52) are fixedly connected. ​ ​ 2. The cannula advancement device for open heart cardiovascular surgery of claim 1, wherein, ​ 3. The cannula advancement device for open heart cardiovascular surgery of claim 2, wherein, ​ 4. The cannula advancement device for open heart cardiovascular surgery of claim 3, wherein, ​ 5. The cannula advancement device for open heart cardiovascular surgery of claim 4, wherein, The outer wall of the rotating shaft (53) is fixedly installed with a limiting wheel (531), the position of the limiting wheel (531) is opposite to the position of the limiting half ring (522), the outer wall of the limiting wheel (531) abuts against the inner wall of the limiting half ring (522), and the outer wall of the limiting wheel (531) and the inner wall of the limiting half ring (522) are both provided with a plurality of anti-skid convex points, and one end of the rotating shaft (53) extends to the outside of the fixed frame (51) and is installed with a fixedly connected driving roller (54).

6. The cannula advancement device for open heart cardiovascular surgery of claim 1, wherein, The bottom of the propelling cylinder (1) is fixedly connected with a supporting frame (11), one end of the propelling cylinder (1) is fixedly installed with symmetrically distributed adapter strips (12), and the outer walls of the two adapter strips (12) are fixedly connected with corresponding mounting plates (21) respectively.

7. The cannula advancement device for open heart cardiovascular surgery of claim 1, wherein, The inside of the propelling cylinder (1) is provided with a guiding assembly (3) for propelling and guiding the cannula body (4), the guiding assembly (3) comprises supporting pieces (31), each group of the supporting pieces (31) comprises two, and the four groups of the supporting pieces (31) are symmetrically distributed in pairs with the center of the propelling cylinder (1).

8. The cannula advancement device for cardiovascular surgery of the heart of claim 7, wherein, A plurality of rotatingly connected guide wheels (311) are arranged between the two supporting pieces (31) in the same group, and the outer wall of the guide wheel (311) abuts against the outer wall of the cannula body (4).

9. The cannula advancement device for cardiovascular surgery of the heart according to claim 8, wherein, The two ends of the two supporting pieces (31) in the same group are provided with the same fixedly connected connecting blocks (312), the outer wall of the connecting block (312) on one side is externally provided with a rotationally connected adjusting rod (32), the end of the adjusting rod (32) extends to the outside of the propelling cylinder (1), and the outer wall of the adjusting rod (32) is threadedly connected with the inner wall of the propelling cylinder (1).

10. The cannula advancement device for open heart cardiovascular surgery of claim 9, wherein, The outer wall of the connecting block (312) on the other side is provided with a fixedly connected guide rod (33), the end of the guide rod (33) extends to the outer wall of the propelling cylinder (1), the outer wall of the guide rod (33) abuts against and is slidingly connected with the inner wall of the propelling cylinder (1), and the outer wall of the guide rod (33) is provided with a scale bar.

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