A lymphedema limb circumference and volume integrated measuring and outputting device

By using lidar measurement and 3D printing technology, the circumference and volume of limbs with lymphedema can be measured and output simultaneously, solving the problems of cumbersome measurement and large error in existing technologies, and improving the convenience and accuracy of measurement.

CN122498818APending Publication Date: 2026-08-04THE SECOND HOSPITAL OF DALIAN MEDICAL UNIV
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
THE SECOND HOSPITAL OF DALIAN MEDICAL UNIV
Filing Date
2026-06-16
Publication Date
2026-08-04

AI Technical Summary

Technical Problem

Existing technologies lack a convenient and accurate device for simultaneously measuring the circumference and volume of limbs with lymphedema, and also suffer from problems such as cumbersome operation, large errors, and poor patient compliance.

Method used

A device comprising a support plate, a scanning component, and a driving component is used to measure the circumference of a limb using a lidar and combine it with a 3D printer to generate a limb model, thereby achieving simultaneous measurement and output of circumference and volume.

Benefits of technology

It enables convenient and integrated measurement of the circumference and volume of limbs with lymphedema, reduces operation steps, improves measurement accuracy and patient compliance, and provides standardized data reports.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122498818A_ABST
    Figure CN122498818A_ABST
Patent Text Reader

Abstract

The application discloses a kind of lymphedema limb perimeter and volume integrated measurement and output device, it is related to medical auxiliary detection equipment technical field, including support plate, the lower surface of the both ends of support plate is respectively installed with support;Two supports are installed with drive assembly between opposite surfaces, drive assembly is fixedly connected with one end of connecting pipe, the other end of connecting pipe is installed with scanning assembly, and scanning assembly is wrapped in the outside of support plate;Drive assembly is electrically connected with scanning assembly;Cable connector is reserved on the side wall of support, and cable connector is fixedly connected with cable;Drive assembly, scanning assembly are electrically connected with control terminal by cable.The application discloses a kind of lymphedema limb perimeter and volume integrated measurement and output device, the limb of patient is accurately measured by laser radar, and can be scanned modeling to the limb of patient according to measurement data, it is convenient for medical staff to simulate and analyze.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This invention relates to the field of auxiliary detection equipment technology, specifically to a device for the simultaneous measurement, data processing, and result output of the circumference and volume of limbs with lymphedema. Background Technology

[0002] Lymphedema is a chronic, progressive disease caused by the retention of protein-rich lymph fluid in the interstitial spaces due to lymphatic system dysfunction, leading to swelling of the limbs. This condition is often closely related to surgery, radiotherapy, and congenital abnormalities. Lymphedema not only affects appearance but can also cause infections, skin lesions, and other problems, seriously threatening the patient's physical and mental health.

[0003] Accurate assessment of changes in limb volume and circumference is crucial for the early diagnosis, staging, and evaluation of treatment outcomes in lymphedema.

[0004] Currently, commonly used clinical assessment methods have the following shortcomings: Traditional contact measurement method: The circumference of multiple fixed points on the limb is measured with a tape measure, and the volume is calculated by formula (such as the frustum of a cone formula). This method is cumbersome, time-consuming, highly dependent on the operator's experience, and cannot avoid errors caused by different body positions and different people. At the same time, different segments need to be marked after measurement to save data, which may cause problems such as skin contamination and pressure therapy products. Finally, the records marked on the limb are re-documented, which is cumbersome and time-consuming. Water displacement method: regarded as the "gold standard" for volume measurement, it measures limb volume by the amount of water displaced, but the equipment is bulky, inconvenient to disinfect, and cannot simultaneously obtain circumference data of each cross section, resulting in poor patient compliance.

[0005] In summary, current technologies lack a measurement tool that can simultaneously balance convenience, accuracy, and data synchronization. Specifically, it is difficult to integrate the two key indicators, "circumference" and "volume," into a single physical measurement process. Medical staff often need to measure the circumference first and then calculate the volume separately, or rely on large equipment to obtain the data separately. This not only increases measurement errors but also reduces the efficiency of clinical diagnosis.

[0006] Developing an integrated measurement and output device for limb circumference and volume in lymphedema, with a simple structure and convenient operation, capable of simultaneously measuring limb circumference and volume and automatically outputting standardized data reports, has become a technical challenge that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] The purpose of this invention is to provide an integrated measurement and output device for the circumference and volume of limbs with lymphedema, thereby solving the problems listed in the background art.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides an integrated measurement and output device for limb circumference and volume in lymphedema, comprising a support plate, wherein brackets are respectively installed on the lower surfaces of both ends of the support plate. A drive assembly is installed between the opposing surfaces of the two brackets. The drive assembly is fixedly connected to one end of the connecting tube, and a scanning assembly is installed at the other end of the connecting tube. The scanning assembly is fitted onto the outside of the support plate. The driving component is electrically connected to the scanning component; The side wall of the bracket has a pre-installed cable connector, which is fixedly connected to the cable. The drive component and the scanning component are electrically connected to the control terminal via cables.

[0009] Preferably, the support plate is made of a transparent material.

[0010] Preferably, the support plate is threadedly connected to the bracket.

[0011] Preferably, the scanning component includes a housing, which is annular; A stator is installed on the inner wall of the outer ring of the housing, and the stator is magnetically connected to the rotor. A laser radar is installed at equal angles on the rotor; Multiple lidar units are electrically connected via conductive slip rings.

[0012] Preferably, a rotor monitoring sensor is installed on the inner wall of the housing.

[0013] Preferably, a brush is installed at one end of the cable, and the brush is electrically connected to the conductive slip ring.

[0014] Preferably, the drive assembly includes a magnetic guide rail, the sidewall of which is fixedly connected to the bracket; A slider is slidably mounted on the magnetic guide rail, and the magnetic guide rail and the slider are connected by a drag chain. The connecting pipe is connected to the slider; the cable is arranged inside the connecting pipe and the cable chain.

[0015] Preferably, a second lidar is mounted on the side wall of the slider, the measuring head of the second lidar faces the bracket, and the second lidar is electrically connected to the cable.

[0016] Compared with the prior art, the beneficial technical effects of the present invention are as follows: This invention discloses an integrated measurement and output device for the circumference and volume of a limb in cases of lymphedema. During testing, the patient's limb is placed on a transparent support plate. A drive component drives a circular scanning component to scan and measure the limb on the support plate, and the scanned results are transmitted to a control terminal for modeling and analysis. Furthermore, the control terminal is connected to a 3D printer to print the patient's limb in one piece, forming a 3D model. Simultaneously, utilizing the multi-color printing function of the 3D printer, different colors are used during the printing process to display and differentiate the simulated patient's limb, facilitating analysis and simulation by medical personnel. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of an integrated measurement and output device for the circumference and volume of a limb with lymphedema according to the present invention; Figure 2 This is a three-dimensional schematic diagram of an integrated measurement and output device for limb circumference and volume in lymphedema according to the present invention. Figure 1 ; Figure 3 This is a side view schematic diagram of an integrated measurement and output device for limb circumference and volume in lymphedema according to the present invention; Figure 4 This is a cross-sectional schematic diagram of the scanning component of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1. Scanning component; 101. Housing; 102. Stator; 103. Rotor; 104. LiDAR 1; 2. Support plate; 3. Bracket; 4. Linear motor mover; 5. Magnetic guide rail; 6. Cable connector; 7. Distance detector; 8. Connecting pipe; 9. Cable. Detailed Implementation

[0020] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] like Figure 1-4 As shown, an integrated measurement and output device for the circumference and volume of a limb with lymphedema includes a support plate 2, and brackets 3 are respectively installed on the lower surfaces of both ends of the support plate 2. A drive assembly is installed between the opposing surfaces of the two brackets 3. The drive assembly is fixedly connected to one end of the connecting tube 8. A scanning assembly 1 is installed at the other end of the connecting tube 8, and the scanning assembly 1 is fitted onto the outside of the support plate 2. The driving component is electrically connected to the scanning component 1; A cable connector 6 is provided on the side wall of the bracket 3, and the cable connector 6 is fixedly connected to the cable 9; The drive component and the scanning component 1 are electrically connected to the control terminal via cable 9, and the support plate 2 is made of transparent material; During the examination, the patient's limb is placed on a transparent support plate. The drive component drives a circular scanning component to scan and measure the limb on the support plate, and transmits the scan results to the control terminal for modeling and analysis. Furthermore, the control terminal connects to a 3D printer to print the patient's limb as a single piece, forming a 3D model data. At the same time, with the help of the 3D printer's multi-color printing function, different colors are used to display and distinguish the simulated patient's limb during the printing process, making it convenient for medical staff to analyze and simulate.

[0022] Specifically, the support plate 2 is threadedly connected to the bracket 3, which facilitates quick disassembly and maintenance.

[0023] Specifically, the scanning component includes a housing 101, which is annular; A stator 102 is installed on the inner wall of the outer ring of the housing 101, and the stator 102 is magnetically connected to the rotor 103. A lidar-105 is mounted at equal angles on the rotor 103. The laser pulse emitted by lidar-105 is reflected after irradiating the patient's limb. The receiver records the time from the emission to the reception of the laser pulse. The distance between lidar-105 and the surface of the patient's limb is calculated using the speed of light. The rotor drives lidar-105 to rotate around the patient's limb once, and the distance L1 between the circumferential direction of the patient's limb surface and lidar-105 can be measured. When there is no patient's limb on the support plate, the distance of lidar-105 rotating once is fixed as L. At this time, the circumference of the patient's limb is L2=L-L1, L1=CT / 2, C is the speed of light, and T is the round-trip time of the laser pulse. Multiple lidar units 105 are electrically connected via conductive slip rings 104. A rotor monitoring sensor is installed on the inner wall of the housing 101. A brush is installed at one end of the cable 9. The brush is electrically connected to the conductive slip rings 104. When the rotor of the lidar unit rotates, the conductive slip rings and brushes remain in contact, thereby achieving continuous transmission of electrical energy and signals, solving the problem of cable entanglement during rotor rotation, and ensuring the normal operation of the equipment. Furthermore, rotor monitoring sensors are used to detect the rotor's position and speed, providing feedback to the control system.

[0024] Specifically, the drive assembly includes a magnetic guide rail 5, the sidewall of which is fixedly connected to the bracket 3; A slider 4 is slidably mounted on the magnetic guide rail 5, and the magnetic guide rail 5 and the slider 4 are connected by a drag chain; The connecting pipe 8 is connected to the slider 4; the cable 9 is arranged in the connecting pipe 8 and the drag chain; a second laser radar 7 is installed on the side wall of the slider 4; the measuring head of the second laser radar 7 faces the bracket 3; the second laser radar 7 is electrically connected to the cable 9; a high-precision magnetic scale is also installed on the magnetic guide rail, and works with the second laser radar to detect the position of the slider in real time and achieve precise control. The control terminal moves the slider along the magnetic guide rail, which in turn drives the scanning component to perform a circumferential measurement of the patient's limb on the support plate.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A device for integrating measurement and output of limb circumference and volume in lymphedema, characterized in that: Includes a support plate (2), and brackets (3) are respectively installed on the lower surfaces of both ends of the support plate (2); A drive assembly is installed between the opposing surfaces of the two brackets (3). The drive assembly is fixedly connected to one end of the connecting tube (8). A scanning assembly (1) is installed at the other end of the connecting tube (8). The scanning assembly (1) is fitted onto the outside of the support plate (2). The driving component is electrically connected to the scanning component (1); A cable connector (6) is reserved on the side wall of the bracket (3), and the cable connector (6) is fixedly connected to the cable (9); The drive component and the scanning component (1) are electrically connected to the control terminal via a cable (9).

2. The integrated measurement and output device for lymphedema limb circumference and volume according to claim 1, characterized in that: The support plate (2) is made of transparent material.

3. The integrated measurement and output device for limb circumference and volume in lymphedema according to claim 1, characterized in that: The support plate (2) is threadedly connected to the bracket (3).

4. The integrated measurement and output device for lymphedema limb circumference and volume according to claim 1, characterized in that: The scanning component includes a housing (101), which is annular; A stator (102) is installed on the inner side wall of the outer ring of the housing (101), and the stator (102) is magnetically connected to the rotor (103). A laser radar (105) is installed at equal angles on the rotor (103); Multiple lidar units (105) are electrically connected via conductive slip rings (104).

5. The integrated measurement and output device for lymphedema limb circumference and volume according to claim 4, characterized in that: A rotor monitoring sensor is installed on the inner wall of the housing (101).

6. The integrated measurement and output device for lymphedema limb circumference and volume according to claim 5, characterized in that: A brush is installed at one end of the cable (9), and the brush is electrically connected to the conductive slip ring (104).

7. The integrated measurement and output device for lymphedema limb circumference and volume according to claim 6, characterized in that: The drive assembly includes a magnetic guide rail (5), the sidewall of which is fixedly connected to the bracket (3); A slider (4) is slidably mounted on the magnetic guide rail (5), and the magnetic guide rail (5) and the slider (4) are connected by a drag chain; The connecting pipe (8) is connected to the slider (4); the cable (9) is arranged in the connecting pipe (8) and the drag chain.

8. The integrated measurement and output device for lymphedema limb circumference and volume according to claim 7, characterized in that: A second laser radar (7) is installed on the side wall of the slider (4), and the measuring head of the second laser radar (7) faces the bracket (3). The second laser radar (7) is electrically connected to the cable (9).