An adjustable extraocular muscle pull

Abstract

The utility model provides an adjustable eye muscle pull hook relates to ophthalmic surgical instrument field, including screw rod, measuring tape and fixed in the screw rod's distraction assembly, the distraction assembly includes the screw cap fixed in screw rod one end and the adjustment knob of screw thread fixed on screw rod, still include the support frame fixed on the screw cap and the moving support of rotation fixed on the adjustment button, the moving support and support frame cross connection have two support rods, and the support rod is rotation fixed on the moving support and support frame respectively, the support rod bottom is equipped with the cross hook. With this, the manpower is lightened, and the stable fixing and accurate measurement are provided. With this, the problem that the operation is inconvenient and is not fixed firmly is avoided.

Description

Technical Field

[0001] This utility model relates to the field of ophthalmic surgical instruments, and in particular to an adjustable extraocular muscle retractor. Background Technology

[0002] In current strabismus surgery, the routine procedure involves using a strabismus hook to retrieve the extraocular muscle, followed by an assistant using both hands to pull the muscle out in the opposite direction. Maintaining stable tension and precise muscle measurement after extraction are crucial for surgical success. However, relying solely on manual pulling can sometimes fail to maintain stability, leading to extraocular muscle slippage or insufficient visual exposure. Furthermore, it necessitates separate measurement of the surgical area. This process presents challenges such as inconvenience, insecure fixation, obstructed surgical vision, and numerous steps, increasing the difficulty and risk of the surgery.

[0003] Chinese utility model patent CN219331753U discloses an extraocular muscle traction device, including a fixed arm and a movable arm. The fixed arm is disposed on one side of the movable arm. A first slide rod is movably disposed on the side of the movable arm away from the fixed arm. One end of the first slide rod passes through a threaded hole in the movable arm and is movably connected to the fixed arm. The outer side of the first slide rod is threaded. A second slide rod is movably disposed on one side of the movable arm, and one end of the second slide rod passes through the movable arm and is fixedly connected to the fixed arm. When tractioning the muscle, the fixed arm and the movable arm are first brought together. Then, the hooks are hooked onto both ends of the muscle and fixed between the first and second auxiliary rods. Rotating the nut separates the fixed arm and the movable arm, allowing the muscle to be stretched. The length of the stretched muscle can be observed on the scale of the second slide rod. Once the target value is reached, the device can be stopped for the next surgical operation, making it more convenient to use.

[0004] However, the extraocular muscle traction device mentioned in the above patent, which is used in ophthalmic surgery, has problems such as unstable fixation and inconvenient measurement. Therefore, a solution is needed to improve this problem. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable extraocular muscle retractor to avoid problems such as insecure fixation and inconvenient measurement.

[0006] This utility model provides an adjustable extraocular muscle retractor, including a screw, a measuring ruler, and a spreading assembly fixed to the screw. The spreading assembly includes a nut fixed to one end of the screw and an adjusting knob threaded onto the screw. It also includes a support frame fixed to the nut and a movable bracket rotatably fixed to the adjusting knob. The movable bracket and the support frame are cross-connected by two support rods. The top ends of the support rods are rotatably fixed to the movable bracket and the support frame, respectively. The center positions of the two support rods are rotatably connected. The bottom end of the support rod is provided with a limiting feature, which is slidably disposed in a limiting groove at the top of the support frame and the movable bracket. The bottom end of the movable bracket and the support frame is provided with a horizontal hook.

[0007] By employing the above technical solution, the extraocular muscles can be clearly exposed to the operator's field of vision by hooking the horizontal hook on the expansion component onto the extraocular muscles. Adjusting the adjustment knob moves the movable support along the horizontal bar, allowing relative movement between the movable support and the support frame. The two ends of the support rods engage in a shearing action, and the limiting feature at the bottom of the support rods slides within the limiting grooves of the movable support and the support frame, controlling the distance between the support frame and making the two side supports more stable. This helps to prevent deformation of the support when the target muscle is tense and exerting force, allowing the extraocular muscles to be exposed at an appropriate length within the operator's range, facilitating operation on the extraocular muscles. Furthermore, the support frame is fixed to the nut. In addition, the support rods, which are cross-set between the support frame and the movable support, prevent the movable support from being rotated by friction when the adjustment knob is rotated, maintaining the stability of the support.

[0008] Optionally, a return element is provided between the nut and the adjusting knob, and the return element is sleeved on the screw.

[0009] Using the above technical solution, the return element between the nut and the adjusting knob can move and resist the adjusting knob, thereby preventing the adjusting knob from moving on its own due to the operator's hand shaking when it is rotated to the appropriate position, and providing a certain force for pulling the muscles in the opposite direction.

[0010] Optionally, a measuring scale parallel to the screw is fixed to the top of the nut.

[0011] Using the above technical solution, when adjusting the knob, the distance between the nut and the adjusting knob can be observed by measuring with a ruler, thereby calculating the actual distance the extraocular muscles are pulled out. Attached Figure Description

[0012] Figure 1 A schematic diagram of the overall structure of an adjustable extraocular muscle retractor provided by this utility model.

[0013] Figure 2 A partial cross-sectional view of an adjustable extraocular muscle retractor provided for this utility model.

[0014] Figure 3 A cross-sectional view of an adjustable extraocular muscle retractor groove provided for this utility model.

[0015] Explanation of reference numerals in the attached drawings: 11. Nut; 12. Support frame; 121. Limiting groove; 13. Measuring ruler; 14. Movable bracket; 141. Horizontal hook; 15. Support rod; 151. Limiting feature; 16. Screw; 17. Return element; 18. Adjusting knob. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, but does not exclude other elements or objects.

[0017] This utility model embodiment provides an adjustable extraocular muscle retractor, including a screw 16 and a spreading assembly fixed to the screw 16. The spreading assembly includes a nut 11 fixed to one end of the screw 16 and an adjustment knob 18 threaded onto the screw 16. It also includes a support frame 12 fixed to the nut 11 and a movable bracket 14 rotatably fixed to the adjustment knob. The movable bracket 14 and the support frame 12 are cross-connected by two support rods 15. The top ends of the support rods 15 are respectively rotatably fixed to the movable bracket 14 and the support frame 12. The two support rods 15 are rotatably connected at their center positions. The bottom end of the support rod 15 is provided with a limiting feature 151. The limiting feature 151 is slidably disposed in the limiting groove 121 at the top of the support frame 12 and the movable bracket 14. The bottom end of the movable bracket 14 and the support frame 12 is provided with a horizontal hook 141.

[0018] See Figure 1 , Figure 2 , Figure 3By hooking the horizontal hook 141 on the expansion component onto the extraocular muscle, the extraocular muscle can be clearly exposed to the operator's field of vision. The operator can then adjust the adjustment knob 18 to move the movable support 14 along the horizontal bar. During the movement, the movable support 14 and the support frame 12 move horizontally, and the two ends of the support rod 15 perform a shearing action. During the shearing action, the limiting feature 151 at the bottom of the support rod 15 slides within the limiting groove 121 at the top of the movable support 14 and the support frame 12, and the distance of the horizontal hook 141 changes, thereby adjusting the exposure of the extraocular muscle. The area exposed to the staff facilitates quantitative segmentation of the extraocular muscles. During adjustment, since the support frame 12 is fixed on the nut 11, the support rods 15, which are cross-located between the support frame 12 and the movable support 14, prevent the movable support 14 from being rotated by the friction of the adjustment knob 18 when it is rotated. The movable support 14, which is fixed to one end of the adjustment knob 18, has a through hole concentric with the adjustment knob 18, and the through hole is larger than the maximum outer diameter of the screw 16. During measurement, the reading starts from the zero mark.

[0019] In some embodiments, a return member 17 is provided between the nut 11 and the adjusting knob 18, and the return member 17 is sleeved on the screw 16.

[0020] In fact, the return element 17 between the nut 11 and the adjusting knob 18 can move and resist the adjusting knob 18, thereby preventing the adjusting knob 18 from moving on its own due to the operator's hand shaking when it is rotated to the appropriate position, and providing a certain force for pulling the muscles in the opposite direction.

[0021] In some embodiments, a measuring scale 13 parallel to the screw 16 is fixed to the top of the nut 11.

[0022] In fact, when adjusting knob 18, the distance between nut 11 and adjusting knob 18 can be observed by measuring ruler 13, and the actual distance the extraocular muscle is pulled out by the horizontal hook can be calculated.

[0023] Although the embodiments of this utility model have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations fall within the scope and spirit of this utility model as described in the claims. Moreover, the utility model described herein may have other embodiments and can be implemented or realized in various ways.

Claims

1. An adjustable extraocular muscle retractor, characterized in that, The utility model discloses a screw rod, ruler and the support opening component fixed on the screw rod, the support opening component includes the screw cap fixed on one end of screw rod and the adjusting knob screw fixed on the screw rod, and further includes the support frame fixed on the screw cap and the moving support frame rotationally fixed on the adjusting knob, the moving support frame and the support frame are crossed and are connected with two support rods, the top of moving support frame and support frame is respectively rotationally fixed with the support rod, the center position of two support rods is rotationally connected, the bottom of support rod is equipped with the limit feature, the limit feature is slidably arranged in the limit slot of the top of support frame and moving support frame, and the bottom of moving support frame and support frame is equipped with the horizontal hook.

2. An adjustable extraocular muscle sling according to claim 1, wherein, The screw cap and the adjusting knob are provided with a return element, and the return element is sleeved on the screw rod.

3. An adjustable suture hook for an extraocular muscle according to claim 2, wherein, The screw cap is fixed with a ruler parallel to the screw rod.

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