In-situ measurement device for load sharing ratio of frame body

Abstract

This utility model discloses an in-situ measuring device for the load-sharing ratio of a skeletal structure, relating to the field of orthopedic external fixation technology. It includes an extension rod, which is composed of an upper end, a lower end, and a lead screw. The lead screw is hinged to an upper fixing ring via a universal hinge, and the lower end of the extension rod is hinged to a lower fixing ring via a universal hinge. A limiting sleeve is fitted onto the outer surface of the extension rod. This in-situ measuring device for the load-sharing ratio of a skeletal structure utilizes the coordinated arrangement of components within the extension rod. By rotating the limiting sleeve, the first and second positioning pins move into the limiting groove, thereby achieving the force measurement function of the extension rod. This facilitates medical personnel in observing the support force at the patient's fracture site, analyzing whether the upper and lower fixing rings need to be removed, ensuring good fracture recovery, and avoiding the frequent replacement of the extension rod during force measurement that affects patient recovery, as is common in existing technologies.

Description

Technical Field

[0001] This utility model relates to the field of orthopedic external fixation technology, specifically to an in-situ measuring device for the load-sharing ratio of a skeleton. Background Technology

[0002] In the medical field, when a patient suffers a fracture or deformity in their limbs, the bones need to be immobilized or adjusted to help them heal and reposition as quickly as possible. Clinically, because a fracture is a relatively serious injury and is very painful, the muscles attached to the bone may spasm and contract. Alternatively, due to the weight of the patient's limb itself and the original force of gravity, the fracture ends are prone to misalignment and displacement. Furthermore, fracture healing takes a long time, so external fixation devices must be used to maintain the correct position of the fracture after reduction to prevent it from shifting again.

[0003] In the aforementioned prior art, a structure of Kirschner wire, extension rod, upper fixation ring, and lower fixation ring is typically used. A Kirschner wire is inserted above the patient's fracture site, with both ends of the Kirschner wire connected to the upper fixation ring. A Kirschner wire is inserted below the patient's fracture site, with both ends of the Kirschner wire connected to the lower fixation ring. The upper and lower fixation rings are connected by an extension rod with adjustable distance.

[0004] As the fracture site gradually recovers during treatment, the load distribution among the skeletal structures changes. Physicians can use this change to assess the degree of fracture recovery. Traditional techniques using extension rods only adjust the support distance. During follow-up examinations, physicians typically rely on experience to determine whether the external brace needs removal, failing to recognize the changes in load distribution among the skeletal structures. This can lead to situations where, even after brace removal, the fracture may not have achieved optimal recovery. Existing technologies use axial force sensors connected in series with the extension rods to measure the skeletal load distribution ratio, but this requires replacing the existing extension rods of equal length and then replacing them again after measurement. This is cumbersome, and the replacement may result in displacement, negatively impacting patient recovery. Therefore, we offer an in-situ skeletal load distribution ratio measurement device to address these issues. Utility Model Content

[0005] The purpose of this invention is to provide an in-situ measuring device for the load sharing ratio of a skeleton body, so as to solve the problems raised in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an in-situ measuring device for the load sharing ratio of a skeleton body, comprising an extension rod, wherein the extension rod is composed of an upper end, a lower end, and a lead screw, the lead screw is hinged to an upper fixed ring via a universal hinge, the lower end of the extension rod is hinged to a lower fixed ring via a universal hinge, a limit sleeve is fitted onto the outer surface of the extension rod, and a pressure sensor is fixedly connected between the upper end and the lower end of the extension rod.

[0007] Preferably, the outer surface of the limiting sleeve has a second limiting groove, and the inner wall of the second limiting groove is engaged with a limiting pin. By engaging the limiting pin in the second limiting groove, the lower end of the extension rod can be prevented from detaching from the limiting sleeve, so that the extension rod becomes a whole and is rigidly connected.

[0008] Preferably, the outer surfaces of the upper and lower ends of the extension rod are fixedly connected with a first positioning pin and a second positioning pin. The outer surface of the limiting sleeve is provided with a transverse groove that matches the first and second positioning pins. When medical staff examine the patient, they rotate the limiting sleeve to make it reach the limiting groove in the figure. At this time, the first positioning pin and the lower end of the extension rod can move freely in the longitudinal direction. When the pressure value between the upper and lower fixing rings is applied to the six extension rods, the pressure sensor can test the pressure value between the two adjusting rods, which makes it convenient for medical staff to observe the support force of the patient's fracture position and analyze whether it is necessary to disassemble the upper fixing ring and the extension rod to ensure that the patient's fracture position recovers well.

[0009] Preferably, one end of the upper end of the extension rod is rotatably connected to an extension rod end cap, the inner wall of the extension rod end cap is threadedly connected to the extension rod screw, and the outer surface of the extension rod screw is slidably connected to the upper end and the lower end of the extension rod. By turning the extension rod end cap, the extension rod screw can be driven to slide inside the upper end of the extension rod.

[0010] Preferably, the outer surface of the limiting sleeve is provided with a limiting groove that matches the first positioning pin and the second positioning pin, and the outer surface of the pressure sensor is fixedly connected with a data cable. By setting the data cable, the pressure data can be effectively transmitted to the terminal through the signal, which is convenient for medical staff to record.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This application achieves the force measurement function of the extension rod by using the cooperative arrangement of the components in the extension rod and rotating the limiting sleeve to move the first and second positioning pins into the limiting groove. This facilitates medical staff to observe the support force at the patient's fracture site, analyze whether the upper and lower fixation rings need to be removed, ensure good recovery of the patient's fracture site, and avoid the situation in the prior art where the extension rod needs to be frequently replaced during force measurement, which would affect the patient's recovery.

[0013] 2. This application uses an upper fixation ring, an extension rod, and a lower fixation ring to fix the patient's fracture position. While achieving precise mechanical monitoring, it provides medical staff with convenient treatment operation conditions, and promotes the recovery process of the affected area through a stable mechanical support structure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the external fixing force measuring device of this utility model;

[0015] Figure 2 This is a schematic diagram illustrating the use of the extension rod of this utility model;

[0016] Figure 3 This is a schematic diagram of the assembly of the extension rod of this utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the limiting sleeve of this utility model.

[0018] The following are the labels in the diagram: 1. Upper fixing ring; 2. Extension rod; 3. Lower fixing ring; 201. Upper end of extension rod; 202. Limiting sleeve; 203. Limiting pin; 204. Pressure sensor; 205. Lower end of extension rod; 206. End cap of extension rod; 207. Extension rod lead screw; 208. Limiting groove one; 209. Limiting groove two; 2011. First positioning pin; 2012. Data cable; 2013. Second positioning pin. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model provides a technical solution for an in-situ measurement device for the load sharing ratio of a skeleton body, including an extension rod 2. The extension rod 2 is composed of an upper extension rod 201, a lower extension rod 205, and an extension rod screw 207. The extension rod screw 207 is hinged to an upper fixing ring 1 via a universal hinge, and the lower extension rod 205 is hinged to a lower fixing ring 3 via a universal hinge. The upper extension rod 201, pressure sensor 204, and lower extension rod 205 are arranged sequentially from top to bottom. A limiting sleeve 202 is inserted from the top of the upper extension rod 201 until the first positioning pin 2011 reaches the bottom of the groove of the limiting sleeve 202. At this time, the first positioning pin 2011, data cable 2012, and second positioning pin 2013 are respectively aligned with the horizontal groove, which is considered as longitudinal installation in place.

[0021] The pressure sensor 204 is a common electrical component in the prior art, and this application will not elaborate on its model and internal structure.

[0022] A limit sleeve 202 is fitted onto the outer surface of the extension rod 2. A pressure sensor 204 is fixedly connected between the upper end 201 and the lower end 205 of the extension rod. By setting the pressure sensor 204, the pressure between the upper fixing ring 1 and the lower fixing ring 3 can be effectively detected.

[0023] The outer surface of the limiting sleeve 202 is provided with a limiting groove 209. The inner wall of the limiting groove 209 is engaged with a limiting pin 203. By the limiting pin 203 being engaged in the limiting groove 209, the lower end 205 of the extension rod can be prevented from detaching from the limiting sleeve 202, so that the extension rod 2 becomes a whole and is rigidly connected.

[0024] The outer surfaces of the upper end 201 and the lower end 205 of the extension rod are both fixedly connected to a first positioning pin 2011 and a second positioning pin 2013. The outer surface of the limiting sleeve 202 is provided with a transverse groove that matches the first positioning pin 2011 and the second positioning pin 2013. When medical staff perform a follow-up examination on the patient, they rotate the limiting sleeve 202 to reach the patient. Figure 2 In the middle limiting groove 208, the first positioning pin 2011 and the lower end 205 of the extension rod can move freely in the longitudinal direction. When the pressure value between the upper fixing ring 1 and the lower fixing ring 3 is applied to the six extension rods 2, the pressure sensor 204 can test the pressure value of the upper end 201 and the lower end 205 of the extension rod, so that medical staff can observe the support force of the patient's fracture position and analyze whether it is necessary to disassemble the upper fixing ring 1 and the extension rod 2 to ensure that the patient's fracture position recovers well.

[0025] One end of the upper end 201 of the extension rod is rotatably connected to an extension rod end cap 206. The inner wall of the extension rod end cap 206 is threadedly connected to the extension rod screw 207. The outer surface of the extension rod screw 207 is slidably connected to the upper end 201 and the lower end 205 of the extension rod. The extension rod end cap 206 effectively limits the extension rod screw 207, so that when the extension rod end cap 206 is turned, the extension rod screw 207 can slide within the upper end 201 of the extension rod.

[0026] The outer surface of the limiting sleeve 202 is provided with a limiting groove 208 that is compatible with the first positioning pin 2011 and the second positioning pin 2013. The outer surface of the pressure sensor 204 is fixedly connected with a data line 2012. Through the setting of the data line 2012, the pressure data can be effectively transmitted to the terminal by signal, which is convenient for medical staff to record.

[0027] The structural diagrams of the components shown in the attached figures are exemplary. The specific implementation should be adapted and optimized by considering the functional requirements, assembly conditions and process limitations in the actual application scenario, and adjusting the structural parameters, size specifications and connection methods accordingly.

[0028] Working principle: During the operation, the upper and lower ends of the extension rod 2 are connected to the upper fixing ring 1 and the lower fixing ring 3 respectively via universal hinges, forming a... Figure 1 The upper fixation ring 1 is connected to the upper end of the patient's fracture site via metal bone pins; the lower fixation ring 3 is connected to the lower end of the patient's fracture site via metal bone pins. When medical staff re-examine the patient, they rotate the limiting sleeve 202 to ensure it reaches the correct position. Figure 2 In the middle limiting groove 208, the first positioning pin 2011 and the lower end 205 of the extension rod can move freely in the longitudinal direction. When the pressure value between the upper fixing ring 1 and the lower fixing ring 3 is applied to the six extension rods 2, the pressure sensor 204 can test the pressure value between the upper end 201 and the lower end 205 of the extension rod, so that medical staff can observe the support force of the patient's fracture position and analyze whether it is necessary to remove the upper fixing ring 1 and the lower fixing ring 3 to ensure that the patient's fracture position recovers well. After connecting the six extension rods 2 between the upper fixing ring 1 and the lower fixing ring 3 and fixing the patient's fracture position with the help of the Kirschner wire, the support force of the patient's fracture position is zero. At this time, it is necessary to rely on the bone The muscles outside the skeletal structure provide support. The values ​​displayed on the six pressure sensors 204 between the upper end 201 and the lower end 205 of the six extension rods are 9, 11, 10, 11, 10, and 12, respectively. After a period of time, the values ​​displayed on the three pressure sensors 204 are 6, 8, 7, 8, 7, and 9. At this point, the force distribution ratio at the fracture site is calculated using a formula. The patient continues to rest at home. After a period of time, the values ​​displayed on the six pressure sensors 204 are observed again. When the force distribution ratio at the fracture site is less than 5%, it indicates that the support is mainly provided by the fracture site, and the patient's fracture site is recovering well. The upper fixation ring 1 and the lower fixation ring 3 can then be removed.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An in-situ measuring device for load sharing ratio of a skeleton body, comprising an extension rod (2), characterized in that: The extension rod (2) is composed of an upper end (201), a lower end (205), and a lead screw (207). The lead screw (207) is hinged to an upper fixing ring (1) via a universal hinge. The lower end (205) is hinged to a lower fixing ring (3) via a universal hinge. A limit sleeve (202) is fitted onto the outer surface of the extension rod (2). A pressure sensor (204) is fixedly connected between the upper end (201) and the lower end (205) of the extension rod.

2. The in-situ measurement device for the load sharing ratio of the skeleton body according to claim 1, characterized in that: The outer surface of the limiting sleeve (202) is provided with a limiting groove two (209), and the inner wall of the limiting groove two (209) is engaged with a limiting pin (203).

3. The in-situ measurement device for the load sharing ratio of the skeleton body according to claim 1, characterized in that: The outer surfaces of the upper end (201) and lower end (205) of the extension rod are fixedly connected with a first positioning pin (2011) and a second positioning pin (2013), and the outer surface of the limiting sleeve (202) is provided with a transverse groove that matches the first positioning pin (2011) and the second positioning pin (2013).

4. The in-situ measurement device for the load-sharing ratio of the skeleton body according to claim 1, characterized in that: One end of the upper end (201) of the extension rod is rotatably connected to an extension rod end cap (206). The inner wall of the extension rod end cap (206) is threadedly connected to the extension rod screw (207). The outer surface of the extension rod screw (207) is slidably connected to the upper end (201) and the lower end (205) of the extension rod.

5. The in-situ measurement device for the load sharing ratio of the skeleton body according to claim 1, characterized in that: The outer surface of the limiting sleeve (202) is provided with a limiting groove (208) that is compatible with the first positioning pin (2011) and the second positioning pin (2013), and the outer surface of the pressure sensor (204) is fixedly connected with a data cable (2012).

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