WO2023216496A1

WO2023216496A1 - Double-control-position retractor for expanding field of view of surgical operation

Info

Publication number: WO2023216496A1
Application number: PCT/CN2022/121791
Authority: WO
Inventors: 武青松; 张颖聪; 马鸣; 向璨; 陈实; 吴建才; 金阳; 王征; 罗飞; 王智慧
Original assignee: 华中科技大学同济医学院附属协和医院
Priority date: 2022-05-10
Filing date: 2022-09-27
Publication date: 2023-11-16
Also published as: CN114848054A

Abstract

Provided is a double-control-position retractor for expanding the field of view of a surgical operation, which comprises a fixed block (1) and a movable block (2). The fixed block (1) and the movable block (2) are each provided with a traction arm (3). Traction claws (4) are arranged on the traction arms (3). Two racks (5) disposed in parallel are arranged between the fixed block (1) and the movable block (2). The fineness degrees of teeth on the two racks (5) are different, and the two racks (5) are both connected with a driving assembly (6) on the movable block (2) in a matched manner. The driving assembly (6) can be switched between the two racks (5) having different tooth fineness degrees, that is, rapid adjustment of an expanded distance of the two traction arms (3) can be achieved, and the accurate adjustment of an expanded distance of the two traction arms (3) can also be achieved, thereby facilitating the operation of medical personnel and reducing the working difficulty of medical personnel.

Description

A double-control retractor for surgical field expansion

Cross-references to related applications

This application claims priority to the Chinese patent application filed on May 10, 2022, with application number 202210507170.3 and titled "A dual-control retractor for surgical field expansion", the entire content of which is incorporated herein by reference.

Technical field

The present disclosure relates to the technical field of medical devices, and in particular, to a dual-control retractor for surgical field expansion.

Background technique

In various thoracotomy surgeries in cardiothoracic surgery, in order to facilitate medical staff to see the specific conditions in the patient's chest more comprehensively, a sternal retractor is needed to expand the medical staff's treatment field of view. As shown in Figure 1, the structures of sternal retractors in the prior art mostly cooperate with each other through gears and racks to drive the two retracting arms away from each other.

The disadvantages of the retractor with the above structure are: (1) If the teeth on the rack are designed to be relatively thick, it will be convenient for medical staff to adjust the retractor, but the enlarged distance between the two retracting arms will not facilitate precise adjustment. ; (2) If the teeth on the rack are designed to be relatively fine, the enlarged distance between the two retracting arms will be accurately adjusted, but this will make it very time-consuming for medical staff to adjust.

Contents of the invention

Based on the above problems, the present disclosure provides a dual-control retractor for surgical field expansion.

The present disclosure provides a dual-control retractor for surgical field expansion, which includes a fixed block and a movable block. The fixed block and the movable block are both provided with retracting arms, and the retracting arms are provided with retracting arms. To open the claw, there are two parallel racks arranged between the fixed block and the movable block. The teeth on the two racks are of different fineness, and the two racks are aligned with the movable block. The drive components are connected together;

The driving assembly includes two gears that are disposed in the movable block and can rotate. The teeth on the two gears are of different fineness and mesh with the corresponding racks respectively. The two gears are The central axis of the gear is provided with a shaft hole, and the inner wall of the shaft hole is provided with an annularly arranged tooth groove. A rotation shaft is inserted through the shaft hole, and the rotation shaft is rotationally connected to the movable block. One end of the rotating shaft is provided with a rocking handle, and two convex rings arranged at intervals are provided on the rotating shaft. The convex teeth are annularly arranged on the outer circular wall of the convex ring. When the rotating shaft is pulled axially, When the two convex rings are driven to move up and down and slide into the corresponding shaft holes, the convex teeth on the convex rings engage with the tooth grooves in the shaft holes.

The present disclosure provides a double-control retractor for surgical field expansion, in which the driving assembly can switch between two racks with different tooth fineness, thereby achieving the expansion of the distance between the two retracting arms. It can adjust the block speed; it can also achieve precise adjustment of the distance between the two retracting arms, which facilitates the operation of medical staff and reduces the difficulty of medical staff's work.

Description of the drawings

Figure 1 is a schematic structural diagram of a retractor in the related art;

Figure 2 is a schematic structural diagram of a dual-control retractor for surgical field expansion according to Embodiment 1 of the present disclosure;

Figure 3 is a schematic structural diagram of the driving assembly in state 1 in Figure 2;

Figure 4 is a schematic structural diagram of the state two of the driving assembly in Figure 2;

Figure 5 is a schematic structural diagram of a dual-control retractor for surgical field expansion according to Embodiment 2 of the present disclosure;

Figure 6 is a schematic structural diagram of the retracting claws and retracting arms of a dual-control retractor for surgical field expansion according to Embodiment 3 of the present disclosure;

Figure 7 is a schematic structural diagram of the stopper component of a dual-control retractor for surgical field expansion according to Embodiment 4 of the present disclosure;

8 is a schematic structural diagram of a stopper component of a dual-control retractor for surgical field expansion according to Embodiment 5 of the present disclosure.

Detailed ways

Embodiment 1

As shown in Figure 2, the present disclosure discloses a dual-control retractor for surgical field expansion, which includes a fixed block 1 and a movable block 2. The fixed block 1 and the movable block 2 are both provided with retracting arms 3. The retracting arm 3 is provided with a retracting claw 4, and two parallel racks 5 are provided between the fixed block 1 and the movable block 2. The two racks 5 are fixedly connected to the fixed block 1 and movably connected to the movable block 2. . The teeth on the two racks 5 have different degrees of fineness, and both racks 5 are cooperatively connected with the driving assembly 6 on the movable block 2 .

As shown in Figures 3 and 4, the driving assembly 6 includes two gears 601 that are disposed in the movable block 2 and can rotate. The teeth on the two gears 601 have different fineness and mesh with the corresponding racks 5 respectively. , the central axes of the two gears 601 are both provided with shaft holes 602, and the inner walls of the shaft holes 602 are provided with annularly arranged tooth slots 603. A rotating shaft 604 is inserted through the shaft holes 602, and the rotating shaft 604 is rotatably connected to the movable block. 2, one end of the rotating shaft 604 is provided with a crank handle 605, and two convex rings 606 arranged at intervals are provided on the rotating shaft 604. The convex teeth 607 are annularly arranged on the outer wall of the convex ring 606. When rotated by axial pulling When the shaft 604 drives the two flange rings 606 to move up and down and slide into the corresponding shaft holes 602, the convex teeth 607 on the flange rings 606 mesh with the tooth grooves 603 in the shaft hole 602.

As an optional solution, the teeth on the upper rack 5 are relatively thick, and the teeth on the lower rack 5 are relatively fine.

The method of use of this disclosure is to pull the rotating shaft 604 upward so that the upper flange ring 606 slides into the corresponding shaft hole 602. At this time, the lower flange ring 606 is separated from the corresponding shaft hole 602. The operating rocker 605 drives the rotating shaft 604 to rotate. The rotating shaft 604 drives the upper gear 601 to rotate through the meshed convex teeth 607 and tooth slots 603. Since the upper gear 601 meshes with the rack 5, when the gear 601 rotates, it will drive The movable block 2 slides along the rack 5. Since the teeth on the upper rack 5 are relatively thick, the rotation of the upper gear 601 will quickly drive the two retracting arms 3 away from each other.

When the distance between the two retracting arms 3 reaches a certain size, by pressing down the rotating shaft 604, the lower convex ring 606 slides into the corresponding shaft hole 602. At this time, the upper convex ring 606 and The corresponding shaft holes 602 are separated, and then the above operation is repeated to realize that the rotating shaft 604 continues to rotate and drives the two retracting arms 3 away from each other. Since the teeth on the lower rack 5 are relatively fine, there is a gap between the two retracting arms 3. The expansion distance can be adjusted precisely.

When the rotating shaft 604 is pulled, in order to make the convex ring 606 slide into the corresponding shaft hole 602, in this embodiment, limiting plates 608 are provided at both ends of the rotating shaft 604. When the convex ring 606 slides in, After entering the corresponding shaft hole 602, the limiting plate 608 will abut against the movable block 2.

When the rotating shaft 604 is pulled into place, in order to keep the rotating shaft 604 in the upper or lower position, in this embodiment, a rubber ring 609 is set on the rotating shaft 604 , and the rubber ring 609 is fixed in the movable block 2 . The rubber ring 609 can provide a certain axial friction resistance to prevent the rotating shaft 604 from moving axially.

Because the rotating shaft 604 still needs to rotate, in order to reduce the frictional resistance of the rubber ring 609 to the rotation of the rotating shaft 604 during operation, grease can be applied on the outer wall of the rubber ring 609 so that the rubber ring 609 can accompany the rotating shaft in the movable block 2 604 for rotation.

In this disclosure, the movable block 2 includes a left half block 201 and a right half block 202. The assembly surfaces of the left half block 201 and the right half block 202 are both provided with mounting grooves 203 that cooperate with the driving assembly 6. Each component in the drive assembly 6 is placed in the mounting slot 203 . The left half block 201 and the right half block 202 are fixed together by long bolts.

In this disclosure, the retracting arm 3 and the retracting claw 4 are integrally connected structures. The two retracting arms 3, the fixed block 1 and the movable block 2 are also integrally connected structures.

Embodiment 2

The difference between the present disclosure and the first disclosure is that the retracting claw 4 is adjustable and movably connected to the retracting arm 3 .

As shown in Figure 5, as a possible implementation of an adjustable movable connection structure of the retracting claw 4, in this disclosure, the retracting claw 4 is fixed on the retracting arm 3 through a screw 7, and the threaded end of the screw 7 penetrates the retracting arm 3. The arm 3 is threadedly connected to the retracting claw 4, and the screw cap of the screw 7 is against the retracting arm 3. The direction of the retracting claw 4 in this embodiment can be rotated and adjusted, and can be fixed by the screw 7 after adjustment.

There are multiple retracting claws 4 . In this disclosure, two retracting claws 4 are provided on one retracting arm 3 .

In order to prevent the retracting claw 4 from accidentally rotating, the contact surfaces of the retracting arm 3 and the retracting claw 4 in this disclosure are all anti-slip surfaces.

The remaining structures of the retractor in this disclosure are the same as those in disclosure 1, and will not be described again here.

Embodiment 3

As shown in Figure 6, this disclosure is based on the technology of Disclosure 2. A sliding hole 301 is opened in the retracting arm 3 along the length direction, and the screw 7 penetrates the sliding hole 301 and moves therein. In this way, the distance between the two retracting claws 4 on the same retracting arm 3 can be easily adjusted.

Embodiment 4

As shown in Figure 7, this embodiment is based on the technology of Disclosure 1, Disclosure 2 or Disclosure 3 and adds a stopper 8. The stopper 8 is provided on the movable block 2. When the movable block 2 moves into place, Finally, the movable block 2 can be stopped by the stopping member 8 .

As a possible structure to implement the stopper component 8, in this disclosure, the stopper component 8 is a hand screw, which is connected to the movable block 2 through threads, and its threaded end is against the rack located above. 5 on.

Embodiment 5

As shown in Figure 8, the difference between this disclosure and the fourth disclosure is that the stopper 8 is a hook, and the hook is hooked and matched with the rack 5, and the middle part of the hook is rotatably connected to the movable block 2, and A torsion spring is provided on the rotating connecting shaft of the hook, and the operating end of the hook is exposed on the movable block 2. By pressing the operating end of the hook, the hook can be separated from the rack 5.

The above-mentioned embodiments are preferred embodiments of the present invention. They are only used to facilitate the explanation of the present invention and are not intended to limit the present invention in any form. Those with ordinary knowledge in any of the technical fields may not deviate from the scope of the present invention. Within the scope of the technical features disclosed in the present invention, equivalent embodiments that make partial changes or modifications using the technical content disclosed in the present invention, and do not deviate from the technical features of the present invention, still fall within the scope of the technical features of the present invention.

Claims

A double-control retractor for surgical field expansion, including a fixed block and a movable block. The fixed block and the movable block are both provided with retracting arms, and the retracting arms are provided with retracting claws. Its characteristics The method is that there are two parallel racks arranged between the fixed block and the movable block. The teeth on the two racks are of different fineness, and the two racks are identical with the teeth on the movable block. The drive components are matched and connected;

The driving assembly includes two gears that are disposed in the movable block and can rotate. The teeth on the two gears are of different fineness and mesh with the corresponding racks respectively. The two gears are The central axis of the gear is provided with a shaft hole, and the inner wall of the shaft hole is provided with an annularly arranged tooth groove. A rotation shaft is inserted through the shaft hole, and the rotation shaft is rotationally connected to the movable block. One end of the rotating shaft is provided with a rocking handle, and two convex rings arranged at intervals are provided on the rotating shaft. The convex teeth are annularly arranged on the outer circular wall of the convex ring. When the rotating shaft is pulled axially, When the two convex rings are driven to move up and down and slide into the corresponding shaft holes, the convex teeth on the convex rings engage with the tooth grooves in the shaft holes.
The double-control retractor for surgical field expansion according to claim 1, wherein limit plates are provided at both ends of the rotation shaft.
The double-control retractor for surgical field expansion according to claim 1, wherein a rubber ring is set on the rotating shaft, and the rubber ring is fixed in the movable block.
The double-control retractor for surgical field expansion according to claim 1, wherein the movable block includes a left half block and a right half block, and the left half block and the right half block are fixed together by bolts.
The double-control retractor for surgical field expansion according to claim 1, wherein the retracting claw is adjustable and movably connected to the retracting arm.
The double-control retractor for surgical field expansion according to claim 5, wherein the retracting claws are fixed on the retracting arms by screws, and the contact between the retracting arms and the retracting claws The surfaces are all anti-slip.
The double-control retractor for surgical field expansion according to claim 6, wherein the retracting arm is provided with a sliding hole along the length direction, and the screw penetrates the sliding hole and moves therein.
The double-control retractor for surgical field expansion according to claim 1, wherein the movable block is provided with a stopper component.
The double-control retractor for surgical field expansion according to claim 8, wherein the stopper component is a hand screw, and the hand screw is threadedly connected to the movable block, and its threaded end against the rack located above.
The double-control retractor for surgical field expansion according to claim 9, wherein the stop member is a hook, the hook is hooked and matched with the rack, and the middle part of the hook rotates It is connected to the movable block, and a torsion spring is provided on the rotating connection shaft of the hook.