Portable central venous pressure measuring instrument

Abstract

The invention discloses a portable central venous pressure measuring instrument, and relates to the technical field of medical instruments. The portable central venous pressure measuring instrument comprises a measuring instrument body which is used for installing an infusion tube and detecting the height of the liquid level in the infusion tube; the infusion tube positioning sleeve is embedded in the left side of the front surface of the detector body; the infusion tube positioning sleeve is arranged on the surface of the detector body to install the infusion tube, the infrared sensor is used for detecting the liquid level in the infusion tube, the alarm function of an existing infusion device can be achieved, and after the detector body is adjusted to be aligned with the axillary midline of a patient, infrared rays are used for detecting the height of the liquid level; the central venous pressure value can be accurately and automatically read and automatically uploaded to a computer terminal. And the detector body is fixed on the infusion support, so that the problem that the detector is always held by hands is solved, the manpower is saved, and the influence of factors such as shaking on the detection precision can be avoided. By arranging the infusion tube traction structure, the anti-pulling effect can be achieved, and the detection precision can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a portable central venous pressure measuring instrument. Background Art

[0002] Detecting venous pressure, especially central venous pressure, is an important indicator for evaluating the cardiac return status and fluid balance in patients. The detection method is: first, connect the catheter, infusion set, and manometer with a three-way tube; then, let the patient lie flat so that the 0 point of the manometer is at the same level as the right atrium; secondly, open the clamps of the infusion set and the manometer, let the saline in the infusion set enter the manometer, and close the clamp of the infusion set after reaching a position above the estimated venous pressure; then open the clamp on the catheter, and you can observe that the liquid in the manometer is dropping. When the liquid drops to a certain level and stops dropping, read the number on the manometer, which is the manually measured central venous pressure.

[0003] As shown above, the current detection method requires medical staff to operate the entire process, hold the infusion tube to adjust the height, and visually read the liquid level to obtain the venous pressure value. This will be affected by factors such as the medical staff's jitter, inaccurate 0-point calibration, and inaccurate height measurement. As a result, venous pressure detection requires medical staff to spend more energy on accurate detection and correction, which is relatively cumbersome. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a portable central venous pressure measuring instrument, which solves the problems existing in the existing central venous pressure measurement method.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A portable central venous pressure measuring instrument, comprising:

[0006] The detector body is used to install the infusion tube and detect the liquid level height in the infusion tube;

[0007] The infusion tube positioning sleeve is embedded and installed on the left side of the front of the detector body, and the front opening of the infusion tube positioning sleeve is used to insert the infusion tube;

[0008] The infrared sensor includes a transmitting section and a receiving end, wherein the transmitting section transmits a transverse light beam to illuminate the receiving end, and the receiving end uses the difference in light intensity between the upper and lower parts of the detected liquid level to identify the liquid level;

[0009] A fixing clip is provided on the back of the detector body and is used to clamp the detector body on the infusion stand;

[0010] An extension ruler is detachably mounted on the detector body and is used to extend the range of the infusion tube positioning sleeve to fix the infusion tube, and the infrared sensor is installed in the infusion tube positioning sleeve and the extension ruler;

[0011] The infusion tube traction structure is installed at the lower right corner of the front side of the detector body to clamp the infusion tube, and a section of U-shaped drooping infusion tube is reserved between the infusion tube traction structure and the infusion tube positioning sleeve to reserve pulling space.

[0012] Preferably, the infusion tube positioning sleeve is a silicone sleeve, and the front opening of the infusion tube positioning sleeve is smaller than the inner diameter.

[0013] Preferably, the extension ruler comprises a U-shaped ruler, a plug is fixedly connected to the outside of one end of the U-shaped ruler, and jacks adapted to the plug are provided on the upper and lower sides of the detector body, the infrared sensor is installed in the U-shaped ruler, and when the U-shaped ruler is plugged into the upper and lower sides of the detector body through the plug, the infrared sensor inside the U-shaped ruler is electrically connected to the detector body, a positioning strip for clamping an infusion tube is fixedly connected to the other end inside the U-shaped ruler, and two positioning strips for plugging and positioning the extension ruler are provided on one side of the detector body.

[0014] Preferably, the infusion tube traction structure includes a first positioning column and a second positioning column fixedly connected to the surface of the detector body, and the edges of the first positioning column and the second positioning column are both provided with rubber wheels, the side surfaces of the rubber wheels are curved surfaces, and the infusion tube is stuck between the two rubber wheels and squeezed.

[0015] Preferably, a suspension wire is eccentrically connected to the front side of the rubber wheel on the first positioning column, and a counterweight ball is fixedly connected to the bottom end of the suspension wire. A winding groove for winding the suspension wire is provided on the surface of the first positioning column.

[0016] Preferably, the fixing clip comprises:

[0017] A fixing seat, fixedly connected to the center of the back of the detector body;

[0018] The clip is rotatably connected to the fixed seat on one side through a rotating shaft, and the rotating shaft is sleeved with two sections of torsion springs that elastically press the fixed seat and the clip respectively;

[0019] One end of the ball head pull rod is rotatably connected to the back side of the detector body away from the rotating shaft, and the other end of the ball head pull rod is provided with a ball head for tightening the clamp.

[0020] Preferably, the middle of the clip and the opposite surface of the fixed seat are both arranged as arc surfaces with the same radius, the end of the clip away from the rotating shaft is arranged as a wavy structure, and a notch adapted to the diameter of the middle section of the ball head pull rod is opened in the middle of the wavy structure, the ball head pull rod is rotated through the notch to clamp the wavy structure to limit the opening of the clip, and a groove adapted to the ball head pull rod is opened on one side of the back side of the detector body.

[0021] Preferably, scale lines are provided on the front of the detector body and on both sides of the infusion tube positioning sleeve, a display screen is rotatably connected to the upper front of the infusion tube positioning sleeve, and a accommodating groove for accommodating the display screen is provided on the front of the infusion tube positioning sleeve, a button is provided on the front of the infusion tube positioning sleeve and below the accommodating groove, and a code scanning structure is provided at the bottom of the detector body for scanning the patient's wristband code.

[0022] Preferably, it also includes a calibration patch for sticking on the patient's mid-axillary line. A laser head is also embedded in the side of the detector body. When in use, the laser emitted by the laser head is aimed at the center of the calibration patch to adjust the height of the detector body.

[0023] The present invention provides a portable central venous pressure measuring instrument. Compared with the prior art, it has the following advantages:

[0024] Beneficial effects:

[0025] 1. The portable central venous pressure gauge can install the infusion tube by setting an infusion tube positioning sleeve on the surface of the detector body, and detect the liquid level in the infusion tube by using an infrared sensor. It can not only realize the alarm function of the existing "infusion treasure", but also can accurately judge and automatically read the central venous pressure by using infrared to detect the liquid level height after adjusting the detector body to the height of the patient's mid-axillary line. The reading is convenient and accurate, saving manpower, and the automatically detected value is uploaded to the computer in real time. Fixing the detector body on the infusion stand also saves the problem of manual holding, and can avoid the influence of factors such as jitter on the detection accuracy. The setting of the infusion tube traction structure can also achieve the effect of anti-pulling, and can also ensure the detection accuracy. The overall structure is compact and easy to carry. The design of the extension ruler can be plugged into the upper and lower sides of the detector body, and can be used together with the infrared sensor on the main body of the detector body to achieve a larger range of measurement. The extension ruler is easy to install and can be stored on the side of the detector body when not in use, achieving a portable effect.

[0026] 2. The portable central venous pressure gauge has an infusion tube traction structure that uses two rubber wheels with high friction to clamp the infusion tube. When the infusion tube is pulled, the rubber wheels will rotate, thereby reeling in the hanging line and lifting the counterweight ball, so that the reserved end of the infusion tube can be released to avoid direct pulling on the part installed in the detector body, thereby maintaining a more stable liquid level. By utilizing the gravity of the counterweight ball, after the infusion tube loses the pulling force, the rubber wheel can be driven to rotate to pull back the infusion tube for reservation again. The structure is simple and practical, and the counterweight ball is used instead of a torsion spring, a spring or other rebound structure, so the force is more stable and the force is not large, so that the rubber wheel and the infusion tube will not slide relative to each other.

[0027] 3. The portable central venous pressure gauge uses an elastic clamp for the fixing clamp, so that medical staff can clamp it by hand, which is convenient for assembly and disassembly. The fixing clamp itself uses a torsion spring for elastic clamping. At the same time, an external ball head pull rod is added to cooperate with the wavy structure of the clip. The ball head pull rod is clamped to the inside of the wavy structure, which can further tighten the clip to increase its clamping force, making the fixing clamp clamp more firmly, and avoiding detection errors caused by the detector body sliding down under its own weight.

[0028] 4. The portable central venous pressure gauge sets scale lines on both sides of the infusion tube positioning sleeve, so that medical staff can also read the data directly visually; the display screen used to display the test data is rotated and tilted when in use, so that medical staff do not need to squat to view, which is convenient for observation; the code scanning structure set at the bottom can directly scan the barcode on the patient's wristband, which is convenient for directly entering the patient's identity information; the laser head set on the side is used in conjunction with the calibration patch to more accurately calibrate the height of the detector body, leaving more space for installation distance; the combination of multiple functions greatly facilitates operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the use state of the present invention;

[0030] Figure 2 A three-dimensional diagram of the detector of the present invention;

[0031] Figure 3 It is a rear perspective view of the detector of the present invention;

[0032] Figure 4 It is a schematic diagram of the infusion tube traction structure of the present invention;

[0033] Figure 5 An exploded view of the fixing clip of the present invention;

[0034] Figure 6 It is a schematic diagram of the structure of the clip of the present invention;

[0035] Figure 7 A bottom-up stereogram of the detector of the present invention;

[0036] Figure 8 is a three-dimensional diagram of the extension ruler of the present invention;

[0037] Fig. 9 It is a schematic diagram of infrared detection liquid level of the infrared sensor of the present invention.

[0038] In the figure: 1-detector body, 11-scale line, 12-display screen, 13-accommodating slot, 14-button, 15-code scanning structure, 16-laser head;

[0039] 2-Infusion tube;

[0040] 3-Infusion tube positioning sleeve;

[0041] 4- Infrared sensor;

[0042] 5-fixing clip, 51-fixing seat, 52-clip sheet, 521-arc surface, 522-wavy structure, 523-notch, 53-torsion spring, 54-ball head pull rod, 55-groove;

[0043] 6-infusion tube traction structure, 61-first positioning column, 62-second positioning column, 63-rubber wheel, 64-hanging wire, 65-weighted ball;

[0044] 7- Calibration patch;

[0045] 8-Extension ruler; 81-U-shaped ruler; 82-Plug; 83-Positioning rubber strip;

[0046] 9- Positioning bar. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] See also Figure 1-Figure 9 , the present invention provides the following four technical solutions:

[0049] The first embodiment: a portable central venous pressure measuring instrument, comprising:

[0050] The detector body 1 is used to install the infusion tube 2 and detect the liquid level height in the infusion tube 2;

[0051] The infusion tube positioning sleeve 3 is embedded and installed on the left side of the front of the detector body 1, and the front opening of the infusion tube positioning sleeve 3 is used to insert the infusion tube 2;

[0052] The infrared sensor 4 includes a transmitting section and a receiving end, and the transmitting section emits a vertical light curtain to illuminate the receiving end, and the receiving end uses the different light intensities of the upper and lower parts of the detected liquid level to identify the liquid level;

[0053] A fixing clip 5 is provided on the back of the detector body 1 and is used to clamp the detector body 1 on the infusion stand;

[0054] The infusion tube traction structure 6 is installed at the lower right corner of the front side of the detector body 1 to clamp the infusion tube 2, and a section of the infusion tube 2 with a U-shaped drooping shape is reserved between the infusion tube traction structure 6 and the infusion tube positioning sleeve 3 to reserve a pulling space.

[0055] The extension ruler 8 is detachably mounted on the detector body 1 and is used to extend the range of the infusion tube positioning sleeve 3 to fix the infusion tube 2, and the infrared sensor 4 is installed in the infusion tube positioning sleeve 3 and the extension ruler 8;

[0056] The extension ruler 8 includes a U-shaped ruler 81, and a plug 82 is fixedly connected to the outside of one end of the U-shaped ruler 81. The upper and lower sides of the detector body 1 are provided with jacks adapted to the plug 82. The infrared sensor 4 is installed in the U-shaped ruler 81. When the U-shaped ruler 81 is plugged into the upper and lower sides of the detector body 1 through the plug 82, the infrared sensor 4 inside the U-shaped ruler 81 is electrically connected to the detector body 1. The other end of the inner side of the U-shaped ruler 81 is fixedly connected to a positioning strip 83 for clamping the infusion tube 2. One side of the detector body 1 is provided with two positioning strips 9 for plugging and positioning the extension ruler 8.

[0057] The infusion tube positioning sleeve 3 is a silicone sleeve, and the front opening of the infusion tube positioning sleeve 3 is smaller than the inner diameter.

[0058] By arranging an infusion tube positioning sleeve 3 on the surface of the detector body 1 to install the infusion tube 2, and using the infrared sensor 4 to detect the liquid level in the infusion tube 2, it can not only realize the alarm function of the existing "infusion treasure", but also after the detector body 1 is adjusted to the height of the patient's mid-axillary line, the infrared detection of the liquid level height can be used to accurately judge and automatically read the venous pressure. The reading is convenient and accurate, saving manpower. Fixing the detector body 1 on the infusion stand also saves the problem of manual holding all the time, and can avoid the influence of factors such as shaking on the detection accuracy. The setting of the infusion tube traction structure 6 can also achieve the effect of anti-pulling, and can also ensure the detection accuracy. The overall structure is small and easy to carry; the design of the extension ruler 8 can be plugged into the upper and lower sides of the detector body 1, and used together with the infrared sensor 4 on the main body of the detector body 1, a larger range of measurement can be achieved, and the extension ruler 8 is easy to install and can be stored on the side of the detector body 1 when not in use, achieving a portable effect.

[0059] The second embodiment is mainly different from the first embodiment in that: the infusion tube traction structure 6 includes a first positioning column 61 and a second positioning column 62 fixedly connected to the surface of the detector body 1, and the edges of the first positioning column 61 and the second positioning column 62 are both sleeved with rubber wheels 63, the side surfaces of the rubber wheels 63 are arc-shaped, the infusion tube 2 is stuck between the two rubber wheels 63 and is squeezed, the front side of the rubber wheel 63 on the first positioning column 61 is eccentrically connected to a hanging wire 64, and the bottom end of the hanging wire 64 is fixedly connected to a counterweight ball 65, and the surface of the first positioning column 61 is provided with a winding groove for winding up the hanging wire 64.

[0060] The infusion tube traction structure 6 uses two rubber wheels 63 with large friction to clamp the infusion tube 2. When the infusion tube 2 is pulled, the rubber wheel 63 will be pulled to rotate, and then the suspension line 64 can be rolled up and the counterweight ball 65 can be lifted, so that the reserved end of the infusion tube 2 can be released to avoid direct pulling on the part installed in the detector body 1, so that the liquid level can be maintained more stably. By utilizing the gravity of the counterweight ball 65, after the infusion tube 2 loses the pulling force, the rubber wheel 63 can be driven to rotate to pull back the infusion tube 2 for reserving again. The structure is simple and practical, and the counterweight ball 65 is used to replace the rebound structure such as torsion spring and spring, so the force is more stable and the force is not large, so that the rubber wheel 63 and the infusion tube 2 will not slide relative to each other.

[0061] The third embodiment is mainly different from the first embodiment in that the fixing clip 5 comprises:

[0062] A fixing seat 51 is fixedly connected to the center of the back side of the detector body 1;

[0063] The clip 52 is rotatably connected to the fixed seat 51 on one side through a rotating shaft, and the rotating shaft is sleeved with two sections of torsion springs 53 that elastically press the fixed seat 51 and the clip 52 respectively;

[0064] One end of the ball head pull rod 54 is rotatably connected to the back side of the detector body 1 away from the rotating shaft, and the other end of the ball head pull rod 54 is provided with a ball head for tightening the clamp 52.

[0065] In this embodiment, the middle of the clip 52 and the opposite surface of the fixed seat 51 are both set as an arc surface 521 with the same radius, and an anti-slip rubber pad is set on the inner side of the arc surface 521. The end of the clip 52 away from the rotating shaft is set as a wave-shaped structure 522, and a notch 523 adapted to the diameter of the middle section of the ball head pull rod 54 is opened in the middle of the wave-shaped structure 522. The ball head pull rod 54 passes through the notch 523 by rotating to clamp the wave-shaped structure 522 to limit the opening of the clip 52, and a groove 55 adapted to the ball head pull rod 54 is opened on one side of the back side of the detector body 1.

[0066] The fixing clamp 5 adopts an elastic clamp method, so that medical staff can clamp it by hand, which is convenient for assembly and disassembly. The fixing clamp 5 itself adopts a torsion spring 53 for elastic clamping. At the same time, a ball head pull rod 54 is added to cooperate with the wavy structure 522 of the clip 52, and the ball head pull rod 54 is clamped to the inner side of the wavy structure 522, which can further tighten the clip 52 to increase its clamping force, so that the fixing clamp 5 can be clamped more firmly, which can avoid the detection error caused by the sliding of the detector body 1 under its own weight.

[0067] The fourth embodiment is mainly different from the first embodiment in that scale lines 11 are arranged on the front of the detector body 1 and on both sides of the infusion tube positioning sleeve 3, a display screen 12 is rotatably connected to the upper front of the infusion tube positioning sleeve 3, and a receiving groove 13 for receiving the display screen 12 is arranged on the front of the infusion tube positioning sleeve 3, a button 14 is arranged on the front of the infusion tube positioning sleeve 3 and below the receiving groove 13, a code scanning structure 15 is arranged at the bottom of the detector body 1 for scanning the patient's wristband code, and the code scanning structure 15 is arranged tilted forward and downward; the detector body 1 has a built-in Bluetooth module or other wireless module to facilitate wireless transmission of data to the mobile phone of medical staff.

[0068] This embodiment also includes a calibration patch 7 for sticking on the patient's mid-axillary line. A laser head 16 is also embedded in the side of the detector body 1. When in use, the laser emitted by the laser head 16 is aimed at the center of the calibration patch 7 to adjust the height of the detector body 1.

[0069] By setting scale lines 11 on both sides of the infusion tube positioning sleeve 3, medical staff can also read the data directly visually; and the display screen 12 used to display the test data is rotated and rotated to an inclined state when in use, so that medical staff do not need to squat to view, which is convenient for observation; the code scanning structure 15 set at the bottom can directly scan the barcode on the patient's wristband, which is convenient for directly entering the patient's identity information; the laser head 16 set on the side is used in conjunction with the calibration patch 7 to more accurately calibrate the height of the detector body 1, leaving more space for installation distance; the combination of multiple functions greatly facilitates operation.

[0070] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0071] When in use, firstly attach the calibration patch 7 to the patient's axillary midline, insert the infusion tube 2 into the infusion tube positioning sleeve 3, combine the detector body 1 and the clip 52, open the clip 52, use the fixing clip 5 to clamp the infusion stand and install the detector body 1, then turn on the laser head 16 to emit laser, adjust the height and angle of the detector body 1, align the laser with the center of the calibration patch 7, complete zeroing, and then move the ball head pull rod 54 to make it stuck in the notch 523, and make the ball head pass over the arched part of the wave-shaped structure 522 to hook the clip 52, increase the pressing force of the clip 52, so as to fix it more firmly;

[0072] Then open the Murphy drip pot and wait until the liquid level in the infusion tube 2 drops and stops moving. At this time, the infrared light emitted by the transmitting end of the infrared sensor 4 passes through the infusion tube 2. Due to the different refractive indices of the upper and lower sections of the liquid level in the infusion tube 2, the infrared light received by the receiving end is different, and then the liquid level height is determined. The display screen 12 can display the value, and the data can be wirelessly transmitted to the computer of the medical staff through Bluetooth or other means.

[0073] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0074] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable central venous pressure measuring instrument, characterized in that: include: The detector body is used to install the infusion tube and detect the liquid level height in the infusion tube; The infusion tube positioning sleeve is embedded and installed on the left side of the front of the detector body, and the front opening of the infusion tube positioning sleeve is used to insert the infusion tube; The infrared sensor includes a transmitting section and a receiving end, and the transmitting section emits a horizontal light curtain to illuminate the receiving end, and the receiving end uses the different light intensities of the upper and lower parts of the detected liquid level to identify the liquid level; A fixing clip is provided on the back of the detector body and is used to clamp the detector body on the infusion stand; An extension ruler is detachably mounted on the detector body and is used to extend the range of the infusion tube positioning sleeve to fix the infusion tube, and the infrared sensor is installed in the infusion tube positioning sleeve and the extension ruler; The infusion tube traction structure is installed at the lower right corner of the front side of the detector body to clamp the infusion tube, and a section of U-shaped drooping infusion tube is reserved between the infusion tube traction structure and the infusion tube positioning sleeve to reserve pulling space.

2. A portable central venous pressure measuring instrument according to claim 1, characterized in that: The infusion tube positioning sleeve is a silicone sleeve, and the front opening of the infusion tube positioning sleeve is smaller than the inner diameter.

3. A portable central venous pressure measuring instrument according to claim 1, characterized in that: The extension ruler comprises a U-shaped ruler, a plug is fixedly connected to the outside of one end of the U-shaped ruler, jacks adapted to the plug are arranged on the upper and lower sides of the detector body, the infrared sensor is installed in the U-shaped ruler, and when the U-shaped ruler is plugged into the upper and lower sides of the detector body through the plug, the infrared sensor inside the U-shaped ruler is electrically connected to the detector body, a positioning rubber strip for clamping an infusion tube is fixedly connected to the other end inside the U-shaped ruler, and two positioning strips for plugging and positioning the extension ruler are arranged on one side of the detector body.

4. A portable central venous pressure measuring instrument according to claim 1, characterized in that: The infusion tube traction structure includes a first positioning column and a second positioning column fixedly connected to the surface of the detector body, and the edges of the first positioning column and the second positioning column are both provided with rubber wheels, the side surfaces of the rubber wheels are arc surfaces, and the infusion tube is stuck between the two rubber wheels and is squeezed.

5. A portable central venous pressure measuring instrument according to claim 4, characterized in that: A suspension wire is eccentrically connected to the front side of the rubber wheel on the first positioning column, and a counterweight ball is fixedly connected to the bottom end of the suspension wire. A winding groove for winding the suspension wire is provided on the surface of the first positioning column.

6. A portable central venous pressure measuring instrument according to claim 1, characterized in that: The fixing clip comprises: A fixing seat, fixedly connected to the center of the back of the detector body; The clip is rotatably connected to the fixed seat on one side through a rotating shaft, and the rotating shaft is sleeved with two sections of torsion springs that elastically press the fixed seat and the clip respectively; One end of the ball head pull rod is rotatably connected to the back side of the detector body away from the rotating shaft, and the other end of the ball head pull rod is provided with a ball head for tightening the clamp.

7. A portable central venous pressure measuring instrument according to claim 6, characterized in that: The middle of the clip and the opposite surface of the fixed seat are both arranged as arc surfaces with the same radius, the end of the clip away from the rotating shaft is arranged as a wavy structure, and a notch adapted to the diameter of the middle section of the ball head pull rod is provided in the middle of the wavy structure, the ball head pull rod passes through the notch by rotating to clamp the wavy structure to limit the opening of the clip, and a groove adapted to the ball head pull rod is provided on one side of the back side of the detector body.

8. A portable central venous pressure measuring instrument according to claim 1, characterized in that: Scale lines are arranged on the front of the detector body and on both sides of the infusion tube positioning sleeve. A display screen is rotatably connected to the upper front of the infusion tube positioning sleeve, and a accommodating groove for accommodating the display screen is arranged on the front of the infusion tube positioning sleeve. A button is arranged on the front of the infusion tube positioning sleeve and below the accommodating groove. A code scanning structure is arranged at the bottom of the detector body for scanning the patient's wristband code.

9. A portable central venous pressure measuring instrument according to claim 1, characterized in that: It also includes a calibration patch for sticking on the patient's mid-axillary line. A laser head is also embedded in the side of the detector body. When in use, the laser emitted by the laser head is aimed at the center of the calibration patch to adjust the height of the detector body.

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