A center reference type blood pressure measurement orthogonal positioning calibration device and a positioning calibration method thereof

Abstract

This invention discloses a central reference type orthogonal positioning calibration device and its positioning calibration method for blood pressure measurement, belonging to the field of blood pressure measurement technology. The device includes a support, a first measuring column, and a second measuring column; the support has an integrally formed anti-slip handle; one end of the first measuring column has a first boundary reference section, and the other end has a first gear; one end of the second measuring column has a second boundary reference section, and the other end has a second gear; the first gear and the second gear mesh with each other and are hinged to the support, realizing synchronous rotation and stepless angle adjustment of the two measuring columns; the support has an elastic snap-fit ​​positioning mechanism that can position the measuring columns at a 180° horizontal or 90° orthogonal angle. The elastic snap-fit ​​positioning mechanism avoids visual estimation errors; the combined width is equivalent to one to two fingers in clinical practice; the stepless angle adjustment adapts to different upper arm thicknesses; horizontal positioning and orthogonal positioning achieve precise alignment of the airbag center and equal-height calibration at the heart level.

Description

Technical Field

[0001] This invention relates to the field of blood pressure measurement technology, and more specifically, to a central reference type blood pressure measurement orthogonal positioning calibration device and its positioning calibration method. Background Technology

[0002] In clinical and home blood pressure measurement, accurate cuff positioning is crucial for ensuring accurate blood pressure readings. Traditional methods rely heavily on the operator's visual estimation of the distance between the lower edge of the cuff and the elbow crease, judging the cuff tightness, and estimating the height relationship between the cuff center and the heart level. The standard operating procedure is "one to two finger widths from the lower edge of the cuff to the elbow crease," often using the operator's own middle and index fingers held together as a reference (approximately 2-3 cm). However, due to individual differences in finger thickness and visual estimation bias, positioning errors can easily occur between different operators or at different times by the same operator, leading to a blood pressure measurement error of 5–15 mmHg. In particular, accurately aligning the cuff's center width with the brachial artery pulsation point and with the heart level is difficult to achieve visually. Deviations in cuff center alignment with the brachial artery and inconsistent heart level are the largest sources of systematic error in blood pressure measurement. Therefore, there is an urgent need for an integrated tool that can simultaneously achieve width alignment, angle adaptation, and mandatory height calibration. Summary of the Invention

[0003] The present invention aims to provide a central reference blood pressure measurement orthogonal positioning calibration device and its positioning calibration method to solve the problems of positioning relying on visual inspection, large error and inability to standardize in existing blood pressure measurement.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A central reference type blood pressure measurement orthogonal positioning calibration device, comprising: support; The first measuring column has a first boundary reference section fixedly connected to one end and a first gear fixedly connected to the other end; The second measuring column has a second boundary reference section fixedly connected to one end and a second gear fixedly connected to the other end; When the first measuring column and the second measuring column are completely aligned, the total width of the first measuring column and the second measuring column is 2-3cm. The first gear and the second gear mesh with each other and are respectively hinged to the bracket by the first pin and the second pin, so that the first measuring column and the second measuring column can rotate synchronously in opposite directions within the bracket, thereby realizing stepless adjustment of the opening angle; The bracket is equipped with an elastic snap-fit ​​positioning mechanism for positioning the first measuring column and the second measuring column at a 180° horizontal angle or a 90° orthogonal angle. The mechanism generates a clicking sound and vibration feedback when the angle is in place.

[0005] Furthermore, the elastic snap-fit ​​positioning mechanism includes: The bracket is provided with 90° positioning holes and 180° positioning holes; Both the 90° positioning hole and the 180° positioning hole are equipped with a set of balls and springs; And a first positioning groove and a second positioning groove that cooperate with the ball. The first positioning groove and the second positioning groove are set on the first measuring column or the second measuring column. When the first measuring column and the second measuring column are unfolded at 180°, the ball in the two 180° positioning holes on the horizontal line is respectively inserted into the first positioning groove and the second positioning groove. When the first measuring column and the second measuring column are unfolded at 90°, the ball in the two 90° positioning holes that are unfolded at an angle of 90° is respectively inserted into the first positioning groove and the second positioning groove. The ends of the 90° positioning hole and the 180° positioning hole are sealed by positioning bolts; When the first or second measuring column rotates to 90° or 180°, the marble is inserted into the corresponding first or second positioning groove under the thrust of the spring, producing a clicking sound and vibration, thus achieving angle positioning; when the angle needs to be changed, applying a torque greater than the spring thrust will cause the marble to disengage from the positioning groove, thus unlocking.

[0006] Furthermore, the bracket is integrally formed with an anti-slip handle, and the anti-slip handle is provided with anti-slip teeth; the length of the first boundary reference section and the second boundary reference section is 1.0cm; the diameter of the first measuring column and the second measuring column is 1-1.5cm, and the total length is defined as the length from half the position of the tooth of the first gear or the second gear to the corresponding measuring column and boundary reference section is 7cm; the surface of the bracket is provided with a center calibration indicator point. When the first measuring column and the second measuring column are unfolded in a straight line at 180°, the indicator point is directly opposite the midpoint of the total length after the two measuring columns and the two gears are meshed, and is used to mark the center reference position of the cuff airbag; the lower ends of the first measuring column and the second measuring column are respectively provided with scale lines, each with a length of 1.0cm.

[0007] The present invention also provides a positioning calibration method using the above-mentioned central reference blood pressure measurement orthogonal positioning calibration device, comprising the following steps: Cuff positioning and calibration: Completely bring the first and second measuring columns together, using their flat bottom surfaces to fit against the patient's arm. Align the bottom ends of the two measuring columns with the brachial artery pulsation point or the elbow crease. Using a 2-3 cm gap when brought together, position the lower edge of the cuff 2-3 cm above the elbow crease (equivalent to one to two fingers clinically). Then align the lower edge of the cuff with the upper edge of the second measuring column to complete the initial positioning of the cuff. The brachial artery pulsation point is located at the elbow crease. Adjusting the tightness of the binding: Based on the thickness of the user's upper arm, the opening angle of the first measuring column and the second measuring column can be infinitely adjusted by meshing the first gear and the second gear; for thin upper arms, insert a measuring column into the cuff to adjust the tightness; for thick upper arms, insert the first measuring column and the second measuring column when they are open; for standard upper arms, insert the first measuring column and the second measuring column together. Segmented positioning of the cuff airbag center point: The first and second measuring columns are unfolded to 180° and positioned horizontally. Using the total length of the first and second measuring columns, the first gear and the second gear meshing, as well as the scale line and boundary reference section, the total width of the cuff airbags of 10cm, 12cm, and 14cm specifications are matched respectively. The center point of the scale line, the center point of the lower end of the first measuring column, and the lower end of the first boundary reference section are used as positioning reference points for the edges of the 10cm, 12cm, and 14cm cuff airbags, respectively. The distance between this positioning reference point and the original ART mark point on the cuff is 1cm, thus locating the center point of the cuff airbag. Since the center calibration indicator point is set on the bracket, and when the measuring column is unfolded to 180° horizontally, this indicator point is directly opposite to the midpoint of the total length of the two measuring columns and the two gears after meshing, this indicator point coincides with the center point of the cuff airbag. To ensure the heart and cuff center are at the same level: After completing the above positioning, the cuff center is aligned with the center calibration point. Holding the non-slip handle, rotate the second measuring column. The elastic snap-fit ​​positioning mechanism positions the first and second measuring columns at a 90° orthogonal angle. At this point, the center calibration point moves with the support, but since its relative position to the cuff center was locked during the 180° positioning, this point still represents the spatial position of the cuff center. Using this point as a height reference, align the second boundary reference segment of the second measuring column with the heart level. Adjust the patient's arm height until the second measuring column and the second boundary reference segment are aligned with the heart level, achieving the same height between the heart and the cuff center. Blood pressure measurement can then begin. Beneficial effects

[0008] Compared with the prior art, the present invention has the following beneficial technical effects: First, it eliminates visual estimation errors and achieves standardized positioning. This invention, through the intermeshing of a first and second gear, coupled with an elastic snap-fit ​​positioning mechanism on the support, can position the first and second measuring columns at a 180° horizontal angle or a 90° orthogonal angle, producing a clear clicking sound and vibration upon positioning. The operator can confirm the angle is in place without visual estimation, completely avoiding positioning deviations caused by human estimation and individual differences, significantly improving the repeatability and standardization of blood pressure measurement.

[0009] Secondly, it is equivalent to the clinical standard of one to two fingers, improving clinical applicability. When the first and second measuring columns are fully closed, the total width is designed to be 2-3 cm, precisely equivalent to the clinically accepted standard width of the middle and index fingers when closed. This feature allows this device to directly replace the traditional finger estimation method, conforming to the operating habits of medical staff and eliminating measurement errors caused by differences in the thickness of different operators' fingers.

[0010] Third, stepless angle adjustment adapts to different upper arm sizes. Through the meshing structure of the first and second gears, the two measuring columns can achieve stepless opening angle adjustment. The operator can flexibly adjust the opening degree of the two measuring columns according to the actual thickness of the patient's upper arm, thereby precisely controlling the tightness of the cuff and avoiding blood pressure reading distortion caused by the cuff being too loose or too tight.

[0011] Fourth, precise alignment of the cuff airbag center for multiple specifications. Utilizing different combinations of the first and second measuring columns, scale lines, and boundary reference sections, this device can accurately match the total width of three commonly used cuff airbags: 10cm, 12cm, and 14cm. By maintaining a fixed 1cm distance between the preset positioning reference point and the original ART marking point on the cuff, the center point of the cuff airbag can be quickly and accurately located, ensuring that the airbag center coincides with the center calibration indication point, significantly improving measurement accuracy.

[0012] Fifth, a fixed geometric relationship enables level calibration of the heart. The center calibration indicator is located on the stent and has a fixed geometric correspondence with the midpoint of the total length of the two measuring columns and two gears after meshing. In 180° horizontal positioning, this indicator precisely coincides with the center of the cuff; after rotating to 90° orthogonal positioning, this indicator moves with the stent but always maintains its relative position to the center of the cuff, becoming a spatial reference benchmark for the cuff center. Combined with the horizontal orientation of the second boundary reference segment, precise level calibration of the heart is achieved.

[0013] Sixth, the device features a simple structure, intuitive operation, and controllable cost. It consists only of a support, two measuring columns, two gears, and a simple ball spring positioning mechanism. It contains no electronic components, making it compact, durable, reliable, easy to clean and disinfect, and low in manufacturing cost. User-friendly designs such as the non-slip handle and center calibration indicator further enhance ease of operation, making it suitable for widespread application in medical institutions at all levels and in home blood pressure monitoring. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is an exploded view of the present invention; Figure 4This is a schematic diagram of the structure of the ball, spring, and positioning bolt of the present invention; Figure 5 This is a schematic diagram of the structure of the first measuring column and the second measuring column of the present invention when they are brought together; Figure 6 This is a diagram showing the usage state of the strap positioning of the present invention; Figure 7 This is a diagram showing the usage state of the elastic band of this invention; Figure 8 This is a diagram showing the usage status of the cuff airbag positioning calibration according to Embodiment 1 of the present invention; Figure 9 This is a diagram illustrating the usage status of the cuff center and heart level calibration of this invention; Figure 10 This is a diagram showing the usage status of the cuff positioning calibration according to Embodiment 2 of the present invention; Figure 11 This is a diagram showing the usage status of the cuff positioning calibration in Embodiment 3 of the present invention.

[0015] 1. First measuring column; 2. First boundary reference section; 3. First pin; 4. First gear; 5. Bracket; 6. Anti-slip handle; 7. Second gear; 8. Second pin; 9. Second measuring column; 10. Second boundary reference section; 11. First positioning groove; 12. Second positioning groove; 13. Ball bearing; 14. Spring; 15. Positioning bolt; 16. 90° positioning hole; 17. 180° positioning hole; 18. Center calibration indicator point; 19. Cuff; 20. Scale line; 21. Patient's arm; 22. Cuff airbag; 23. ART marker point; 24. Brachial artery pulsation point; 25. Heart. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0017] In practical use, the central reference type blood pressure measurement orthogonal positioning calibration device of the present invention can cover the following typical working conditions, which correspond to the key links of blood pressure measurement positioning.

[0018] Example 1 This embodiment performs positioning calibration for a standard 12cm wide cuff airbag 22.

[0019] Cuff positioning calibration: Align the first measuring post 1 and the second measuring post 9 completely (e.g., ...). Figure 6 As shown in the figure, the flat bottom surfaces of the first measuring column 1 and the second measuring column 9 are attached to the patient's arm 21, so that the lower edge of the first measuring column 1 is aligned with the brachial artery pulsation point 24, and then the lower edge of the cuff 19 is aligned with the upper edge of the second measuring column 9 to complete the initial positioning of the cuff airbag 22.

[0020] Adjusting the binding tightness: Based on the patient's upper arm thickness, the opening angle between the first measuring column 1 and the second measuring column 9 is steplessly adjusted by meshing the first gear 4 and the second gear 7 (e.g., ...). Figure 7 (As shown): For slender upper arms, a measuring column can be inserted into the cuff to adjust the tightness. For those with thick upper arms, the first measuring column 1 and the second measuring column 9 should be inserted when they are open. For those with standard upper arms, the first measuring column 1 and the second measuring column 9 should be inserted together.

[0021] The cuff airbag center point is positioned segmentally: The first measuring column 1 and the second measuring column 9 are unfolded to 180° and positioned horizontally. The total length of the 12cm meshing of the first measuring column 1, the second measuring column 9, the first gear 4, and the second gear 7 is used to match the total width of the 12cm cuff airbag 22. The lower end of the first measuring column 1 is used as a positioning reference point for the edge of the cuff airbag 22, thus accurately positioning the center point of the cuff airbag 22. Since the center calibration indicator 18 is set on the bracket 5, and when the measuring column is unfolded to 180° horizontally, this indicator point is directly opposite the midpoint of the total length of the two measuring columns and the two gears after meshing, therefore, this indicator point coincides with the center point of the cuff airbag 22.

[0022] To ensure the heart and cuff center are at the same level: After the above positioning is completed, the center of the cuff 22 is aligned with the center calibration point 18. Holding the non-slip handle 6, rotate the second measuring column 9. The elastic snap-fit ​​positioning mechanism positions the first measuring column 1 and the second measuring column 9 at a 90° orthogonal angle. At this time, the center calibration point 18 moves with the support 5, but since its relative position to the cuff center was locked during the 180° positioning, this point still represents the spatial position of the cuff center. Using this point as a height reference, align the second boundary reference segment 10 of the second measuring column 9 with the heart level. Adjust the height of the patient's arm 21 until the second measuring column 9 and the second boundary reference segment 10 point to the heart 25 at the same level, achieving the same level between the heart and the cuff center. Blood pressure measurement can then begin.

[0023] Example 2 This embodiment performs positioning calibration on the 10cm wide cuff airbag 22.

[0024] The steps for positioning, calibrating, and adjusting the tightness of the cuff are the same as in Example 1.

[0025] The segmented positioning cuff airbag center point: The first measuring column 1 and the second measuring column 9 are unfolded to 180° for straight positioning. This is achieved using the scale lines 20 on the first measuring column 1 and the second measuring column 9, and the total meshing length of the first gear 4 and the second gear 7 (10cm). (See [reference]) Figure 10The system completes the matching with the total width of the 10cm cuff airbag 22. The center point of the scale line 20 at the lower end of the first measuring column 1 is used as the positioning reference point for the edge of the cuff airbag 22. This reference point is 1cm away from the original ART marking point 23 on the cuff, and is positioned at the center point of the cuff airbag 22. Since the center calibration indicator point 18 is set on the bracket 5, and when the measuring column is unfolded at 180°, this indicator point is directly opposite the midpoint of the total length after the two measuring columns and two gears are meshed, this indicator point coincides with the center point of the cuff airbag 22.

[0026] The procedure for measuring the horizontal alignment of the heart and the center point of the cuff is the same as in Example 1.

[0027] Example 3 This embodiment performs positioning calibration on the 14cm wide cuff airbag 22.

[0028] The steps for positioning, calibrating, and adjusting the tightness of the cuff are the same as in Example 1.

[0029] The segmented positioning cuff airbag center point: The first measuring post 1 and the second measuring post 9 are unfolded to 180° for straight positioning. The total meshing length of the first measuring post 1, the second measuring post 9, the first boundary reference segment 2, the second boundary reference segment 10, and the first gear 4 and the second gear 7 is 14cm (see [reference]). Figure 11 The system completes the matching with the total width of the 14cm cuff airbag 22. The lower end of the first boundary reference segment 2 is used as the positioning reference point for the edge of the cuff airbag 22. This reference point is 1cm away from the original ART marking point 23 on the cuff, and is positioned at the center point of the cuff airbag 22. Since the center calibration indicator point 18 is set on the bracket 5, and when the measuring column is unfolded at 180°, this indicator point is directly opposite the midpoint of the total length after the two measuring columns and two gears are meshed, this indicator point coincides with the center point of the cuff airbag 22.

[0030] The procedure for measuring the horizontal alignment of the heart and the center point of the cuff is the same as in Example 1.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A center reference blood pressure measurement orthogonal positioning calibration device, characterized in that, include: Support (5); The first measuring column (1) has a first boundary reference section (2) fixedly connected to one end and a first gear (4) fixedly connected to the other end. The second measuring column (9) has a second boundary reference section (10) fixedly connected to one end and a second gear (7) fixedly connected to the other end. When the first measuring column (1) and the second measuring column (9) are completely joined together, the total width of the first measuring column (1) and the second measuring column (9) is 2-3cm; The first gear (4) meshes with the second gear (7) and is hinged to the bracket (5) by the first pin (3) and the second pin (8) respectively, so that the first measuring column (1) and the second measuring column (9) can rotate synchronously towards and away from each other in the bracket (5) to achieve stepless adjustment of the opening angle; The bracket (5) is provided with an elastic snap-fit ​​positioning mechanism for positioning the first measuring column (1) and the second measuring column (9) at a 180° straight angle or a 90° orthogonal angle. The mechanism generates a clicking sound and vibration feedback when the angle is in place.

2. The central reference type orthogonal positioning calibration device for blood pressure measurement according to claim 1, characterized in that, The elastic snap-in positioning mechanism includes: The bracket (5) is provided with 90° positioning holes (16) and 180° positioning holes (17). Both the 90° positioning hole (16) and the 180° positioning hole (17) are provided with a set of balls (13) and springs (14). And a first positioning groove (11) and a second positioning groove (12) that cooperate with the ball (13). The first positioning groove (11) and the second positioning groove (12) are set on the first measuring column (1) or the second measuring column (9). When the first measuring column (1) and the second measuring column (9) are unfolded at 180°, the ball (13) in the two 180° positioning holes (17) on the horizontal line is respectively inserted into the first positioning groove (11) and the second positioning groove (12). When the first measuring column (1) and the second measuring column (9) are unfolded at 90°, the ball (13) in the two 90° positioning holes (16) unfolded at an angle of 90° is respectively inserted into the first positioning groove (11) and the second positioning groove (12). The ends of the 90° positioning hole (16) and the 180° positioning hole (17) are sealed by positioning bolts (15); When the first measuring column (1) or the second measuring column (9) rotates to 90° or 180°, the marble (13) is inserted into the corresponding first positioning groove (11) or second positioning groove (12) under the thrust of the spring (14), producing a clicking sound and vibration, thus achieving angle positioning; when the angle needs to be changed, applying a torque greater than the thrust of the spring (14) will cause the marble (13) to disengage from the positioning groove, thus achieving unlocking.

3. The central reference type blood pressure measurement orthogonal positioning calibration device according to claim 1, characterized in that, The bracket (5) has an integrally formed anti-slip handle (6) with anti-slip teeth. The lengths of the first boundary reference section (2) and the second boundary reference section (10) are both 1.0 cm. The diameters of the first measuring column (1) and the second measuring column (9) are both 1-1.5 cm. The bracket (5) has a center calibration prompt point (18) on its surface. When the first measuring column (1) and the second measuring column (9) are unfolded at 180°, the prompt point is directly opposite the midpoint of the total length of the two measuring columns and the two gears after meshing, and is used to mark the center reference position of the cuff airbag (22). The lower ends of the first measuring column (1) and the second measuring column (9) are respectively provided with scale lines (20), each with a length of 1.0 cm.

4. A positioning calibration method using the central reference type blood pressure measurement orthogonal positioning calibration device according to any one of claims 1 to 3, characterized in that, Including the following steps: Cuff positioning calibration: Fully close the first measuring column (1) and the second measuring column (9), and place the flat bottom surfaces of the first measuring column (1) and the second measuring column (9) against the patient's arm (21), so that the bottom ends of the two measuring columns are aligned with the brachial artery pulsation point (24) or the elbow crease. Using a closing width of 2–3 cm, position the lower edge of the cuff (19) 2–3 cm above the elbow crease. Then align the lower edge of the cuff (19) with the upper edge of the second measuring column (9) to complete the initial positioning of the cuff airbag (22). Adjusting the tightness of the binding: Based on the thickness of the user's upper arm, the opening angle of the first measuring column (1) and the second measuring column (9) is infinitely adjusted by meshing the first gear (4) and the second gear (7); for thin upper arms, a measuring column is inserted into the cuff to adjust the tightness; for thick upper arms, the first measuring column (1) and the second measuring column (9) are inserted when they are open; for standard upper arms, the first measuring column (1) and the second measuring column (9) are inserted after they are combined. Segmented positioning cuff airbag center point: unfold the first measuring column (1) and the second measuring column (9) to 180° For straight positioning, the total length of the meshing of the first measuring column (1), the second measuring column (9), the first gear (4) and the second gear (7), as well as the scale line (20) and the first boundary reference section (2) and the second boundary reference section (10), are used to match the total width of the cuff airbag (22) of 10cm, 12cm and 14cm specifications respectively; the center point of the scale line (20), the center point of the lower end of the first measuring column (1) and the lower end of the first boundary reference section (2) are used as positioning reference points for the edges of the 10cm, 12cm and 14cm cuff airbag (22) respectively, thereby positioning the center point of the cuff airbag (22); since the center calibration prompt point (18) is set on the bracket (5), and when the measuring column is unfolded in a straight 180° position, the prompt point is directly opposite the midpoint of the total length of the two measuring columns and the two gears after meshing, so the prompt point coincides with the center point of the cuff airbag (22); Measuring the horizontal alignment of the heart and the center point of the cuff: After completing the above positioning, the center of the cuff (22) is aligned with the center calibration prompt point (18). Holding the anti-slip handle (6), rotate the second measuring column (9) to position the first measuring column (1) and the second measuring column (9) at a 90° orthogonal angle through the elastic snap-in positioning mechanism. At this time, the center calibration prompt point (18) moves with the support (5), but since its relative position to the center of the cuff has been locked at 180° positioning, this prompt point still represents the spatial position of the center of the cuff. Using this prompt point as a height reference, make the second boundary reference segment (10) of the second measuring column (9) point to the horizontal line of the heart (25), and adjust the height of the patient's arm (21) until the second measuring column (9) and the second boundary reference segment (10) point to the horizontal line of the heart (25), so that the center point of the heart (25) and the center point of the cuff (22) are horizontally aligned, and blood pressure measurement can begin.

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