Central venous pressure measuring scale

Abstract

The utility model relates to the technical field of medical instruments, in particular to a central venous pressure measuring scale, which comprises a graduated scale, and further comprises a positioning scale and a fixing mechanism which are detachably connected onto the graduated scale, the positioning ruler is rotationally connected with the graduated scale; the fixing mechanism is used for fixing the graduated scale; the positioning ruler comprises a positioning rod and a telescopic rod; the positioning rod is connected with the telescopic rod through a hinge shaft, and the positioning rod is rotationally connected with the graduated scale; the device further comprises a sliding seat. The front part of the sliding seat is connected with the elastic clamp, and the rear part is slidably connected with a guide rail; and a locking arm is arranged on the guide rail. The locking arm of the fixing mechanism is fixed to the bedside, the guide rail is immovable in use, the position of the measuring scale is flexibly adjusted by sliding the sliding seat on the guide rail, operation is simpler and faster, and positioning and fixing can be completed without complex steps.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially, a kind of central venous pressure measuring scale. BACKGROUND

[0002] Central venous pressure (Central Venous Pressure, CVP) is the pressure in right atrium or thoracic segment superior and inferior vena cava, it is one of important indexes reflecting right heart function and blood volume, in clinic, CVP monitoring is mainly used to assess cardiac function, guide fluid therapy, prevent pulmonary edema and heart failure etc.

[0003] The Chinese patent with the authorization announcement number CN209203238U discloses a central venous pressure measuring scale, which comprises a scale, a positioning ruler and a fixing mechanism, the positioning ruler is rotationally arranged at the zero point of the scale, the positioning ruler comprises a rotating seat matched with the positioning ruler, a positioning head in contact with the measured person, and an extension rod connected with the rotating seat and the positioning head at two ends, the fixing mechanism is arranged at the back of the scale to fix the scale on the fixing rod, the fixing mechanism comprises an elastic seat and two locking arms curved from both sides of the elastic seat to the middle, and the two locking arms are clamped and fixed on the fixing rod. The utility model has the advantages of simple and stable structure, one-hand clamping and placing, adjustable length of the positioning ruler according to the extension rod, convenient and fast operation, and improved work efficiency of medical staff.

[0004] However, the above-mentioned central venous pressure measuring scale still has the following problems in use: (1) the central venous pressure measuring scale adheres and fixes the scale and the fixing mechanism through the elastic seat, which is inconvenient to disassemble and can accelerate the damage of the scale by repeated operation; (2) the central venous pressure measuring scale fixes the scale and the fixing rod through the fixing mechanism, which can only be applied to specific fixing rods and has large limitation in use scenarios. UTILITY MODEL CONTENTS

[0005] In view of the problems existing in the prior art, the utility model provides a central venous pressure measuring scale, on the one hand, the fixing rod with the functions of extension and bending is designed to adjust the length and angle of the measuring scale to adapt to the inconsistency of midaxillary line position caused by the differences of different patients, thereby improving the accuracy of measurement; on the other hand, the locking arm is designed with magic tape to adapt to more types of fixing rods, the sliding seat slides on the guide rail to flexibly adjust the position of the measuring scale, and the operation is more simple and fast, without complex steps to complete positioning and fixing.

[0006] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0007] The application provides a central venous pressure measuring scale, which comprises a scale ruler, a positioning ruler and a fixing mechanism detachably connected to the scale ruler, the positioning ruler is rotationally connected to the scale ruler, and the fixing mechanism is used for fixing the scale ruler.

[0008] Further, the positioning ruler comprises a positioning rod and a telescopic rod, the positioning rod is connected to the telescopic rod through a hinge shaft, and the positioning rod is rotationally connected to the scale ruler.

[0009] Further, the scale ruler is provided with a rotating seat and a limiting seat used for connecting the positioning ruler, and the positioning rod is provided with a clamping groove matched with the limiting seat.

[0010] Further, the rotating seat comprises a limiting rod penetrating through the scale ruler, and the limiting rod is rotationally matched with the scale ruler through the positioning ruler.

[0011] Further, the fixing mechanism comprises an elastic clamp matched with the scale ruler, and further comprises a sliding seat, the sliding seat is connected to the elastic clamp at the front part, and a guide rail is slidably connected to the rear part of the sliding seat, and the guide rail is provided with a locking arm.

[0012] Further, a locker is arranged between the guide rail and the sliding seat, and the locker comprises a locking handle arranged outside the sliding seat.

[0013] Compared with the prior art, the application has the following beneficial effects:

[0014] 1. The accuracy is improved: through accurate scaling, the fixed rod with the functions of telescoping and bending is designed, so that the measuring scale can adjust the length and angle to adapt to the inconsistency of the midaxillary line caused by the differences of different patients, and the accuracy of measurement is improved.

[0015] 2. The operation is convenient: the locking arm of the fixing mechanism is fixed on the bedside, the guide rail is immovable during use, the position of the measuring scale is flexibly adjusted on the guide rail through the sliding seat, the operation is more simple and fast, and the positioning and fixing can be completed without complex steps.

[0016] 3. Strong adaptability: the locking arm adopts a magic tape design, which can adapt to more types of fixed rods and is suitable for measurement in various scenes.

[0017] 4. Good stability: the elastic clamp is made of a material with high elasticity and plasticity and has an arc-shaped design, so that the scale ruler cannot be easily moved during use, and large friction force is not generated during installation or removal, and meanwhile, the detachable design of the fixed ruler and the scale ruler improves the service life of the measuring scale and the reliability of the measurement result. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the following drawings only show some of the embodiments of the present application, and therefore should not be considered as a limitation to the scope. Other related drawings can also be obtained by those skilled in the art without any creative effort.

[0019] Figure 1 It is a structural schematic diagram of the present application;

[0020] Figure 2 It is a side structural schematic diagram of the present application;

[0021] Figure 3 It is a structural schematic diagram of the present application Figure 1 It is a local enlarged view of A in the present application;

[0022] Figure 4 It is a schematic diagram of the present application after the positioning ruler is adjusted in angle;

[0023] Figure 5 It is a schematic diagram of the fixing mechanism of the present application.

[0024] In the figure: 1, scale ruler; 11, rotating seat; 12, limiting seat; 13, limiting rod; 2, positioning ruler; 21, positioning rod; 22, telescopic rod; 23, hinged shaft; 24, clamping groove; 25, positioning head; 26, spare groove; 3, fixing mechanism; 31, elastic clamp; 32, locking arm; 33, sliding seat; 34, guide rail; 35, locking handle. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments will be described clearly and completely in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments, not all the embodiments.

[0026] In the description of the present application, it should be understood that the terms "front", "back", "left", "right", "up", "down", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore should not be construed or implied that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as a limitation to the present application.

[0027] In the description of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Embodiment one

[0028] In combination Figures 1-5 The utility model provides a central venous pressure measuring scale, including scale 1, and the positioning ruler 2 and fixed mechanism 3 of detachable connection in scale 1, the recess is provided in the middle position, the length of scale 1 is 55cm, also can be one length in the range 50cm-100cm, the width is 3cm, also can be one length in the range 3cm-10cm, usually adopts transparent plastic or organic glass material to facilitate the observation liquid column's height, and the scale line of clear identification on scale 1 usually takes centimeter water column (cmH2O) as the unit, and the number is clearly visible, facilitates reading, positioning ruler 2 with scale 1 is rotatably connected, fixed mechanism 1 is used to fix scale 1.

[0029] It needs to be explained that the central venous catheter is connected with the transparent pipeline through the tee joint, when using, the transparent pipeline is fixed in the recess in the middle of scale 1, and the lower end of the transparent pipeline is aligned with the zero mark of scale 1.

[0030] Further, the positioning ruler 2 includes a positioning rod 21 and a telescopic rod 22, the positioning rod 21 and the telescopic rod 22 are connected through a hinge shaft 23, and the positioning rod 21 is rotatably connected with the scale 1, the telescopic rod 22 is provided with a positioning head 25, which helps to determine the specific position of the central venous pressure. When the telescopic rod 22 is not elongated, the positioning head 25 is located outside the telescopic rod 22, at this time, the total length of the telescopic rod 22 and the positioning head 25 is 30cm, when using, the positioning head 25 is manually pulled to make the rod inside the telescopic rod 22 elongated, when maximized, the total length of the telescopic rod 22 can reach 55cm. The length of the positioning rod 21 corresponds to the width of the scale 1. When using, the positioning rod 21 and the telescopic rod 22 can rotate relatively, which plays a role of positioning forward or backward.

[0031] The scale 1 is provided with a rotating seat 11 and a limiting seat 12 for connecting the positioning ruler 2, the positioning ruler 2 can be rotated and adjusted on the scale 1, and is usually adjusted to 90 degrees, at this time, the limiting seat 12 fixes the tail of the positioning ruler 2, the positioning rod 21 is provided with a clamping groove 24 matched with the limiting seat 12, and there is a certain resistance between the limiting seat 12 and the clamping groove 24, so that the positioning ruler 2 is more stable and is not easy to move.

[0032] The rotating seat 11 comprises a limiting rod 13 penetrating through the scale 1, the rear end of the limiting rod 13 is provided with an external thread and a nut matched with the external thread, the nut prevents displacement during measurement, and the positioning ruler 2 is detachably connected with the scale 1 through the limiting rod 13; the limiting rod 13 penetrates through the positioning ruler 2 and is matched with the scale 1 to rotate, when the positioning ruler 2 is rotated to a corresponding angle, the nut at the back can be adjusted to further fix the position of the positioning ruler 2.

[0033] Working principle, the fixing mechanism 3 can fix the scale 1 on the bedside, then, the nut at the back of the scale 1 is loosened and the positioning ruler 2 is rotated to 90 degrees, the clamping groove 24 at the tail is connected with the limiting seat 12, the nut is tightened to further fix the positioning ruler 2, then the length of the telescopic rod 22 is adjusted to make the positioning head 25 align with the specific position of the central venous pressure of the patient, if the patient is located at the back of the scale 1, the telescopic rod 22 can be rotated to a certain angle to the specific position of the central venous pressure of the patient. Embodiment two

[0034] On the basis of embodiment one, referring to Figure 5 In order to further improve the practicability of the measuring ruler, the fixing mechanism 3 comprises an elastic clamp 31 matched with the scale 1, which is used for clamping the lower part of the scale 1, the elastic clamp 31 is made of elastic rubber, and a plurality of arc protrusions are arranged on the inner side of the elastic clamp 31, which improves the stability and reduces the abrasion of the surface of the scale 1; the fixing mechanism 3 further comprises a sliding seat 33, the front part of the sliding seat 33 is connected with the elastic clamp 31, the elastic clamp 31 is used in cooperation with the scale 1, and the rear part is slidingly connected with a guide rail 34, the guide rail 34 is provided with a locking arm 32, the locking arm 32 is designed by magic tape to adapt to various scenes in which the measuring ruler can be fixed, and in use, the scale 1 is fixed on the elastic clamp 31, and the scale 1 adjusts the position by sliding of the sliding seat 33 on the guide rail 34.

[0035] It should be noted that the height dimension of the elastic clamp 31 corresponds to that of the sliding seat 33, and the size range is 3cm-6cm, the height dimension of the locking arm 32 ranges from 2cm to 5cm, and the locking arm 32 is arranged at the middle part of the guide rail 34.

[0036] Further, a locking device is arranged between the guide rail 34 and the sliding seat 33; the locking device comprises a locking handle 35 arranged outside the sliding seat 33. The sliding block locking mechanism is a prior art, and thus will not be described in detail.

[0037] Working principle: the elastic clamp 31 is used to clamp the scale 1. When the fixed position of the locking arm 32 cannot make the positioning head 25 determine the specific position of the central venous pressure of the patient in the field environment, the position of the sliding seat 33 on the guide rail 34 can be adjusted to drive the scale 1 to slide, so that the positioning head 25 can more accurately find the measurement position on the basis of the first embodiment.

[0038] Specific application cases

[0039] A central venous pressure measuring scale is mainly used for monitoring the condition of patients in the intensive care unit (ICU) or other patients who need to continuously monitor the central venous pressure (CVP). Central venous pressure is an indicator reflecting the pressure changes in the right atrium and the superior and inferior vena cava in the chest. It can be used to evaluate the heart pumping function and the body fluid volume status. Suppose a critically ill patient is being monitored after central venous catheterization. Since the patient has circulatory instability, the doctor needs to regularly monitor the patient's central venous pressure to evaluate his heart function and body fluid volume status, and adjust the treatment plan accordingly.

[0040] The present application provides a central venous pressure measuring scale, which in use, the specific operation process is:

[0041] Prepare the central venous pressure measuring scale and other required instruments; confirm that the central venous pressure catheter has been properly placed and connected to the transparent extension tube to observe blood flow; use the elastic clip 31 in the fixing mechanism 3 to fix the measuring scale, ensure that the measuring scale does not move during measurement, install the positioning scale 2 on the scale 1 by rotating the seat 11, rotate the positioning scale 2, and fix the clamping groove 24 on the positioning rod 21 of the positioning scale 2 with the limiting seat 12 on the scale 1, adjust the length and angle of the telescopic rod 22 to suit the patient's body type and measurement needs; if necessary, adjust the position of the sliding seat 33, lock the sliding seat 33 with the locking handle 35, and further fix the position of the measuring scale; gently touch the positioning head 25 on the positioning scale 2 to the fourth rib level of the midaxillary line, which is the reference point for CVP measurement, adjust the angle of the positioning scale 2 according to the specific situation of the patient, and ensure that the positioning head 25 is accurately placed; adjust the zero point mark of the transparent extension tube to the same horizontal line as the positioning head 25, and ensure that the zero point is at the correct anatomical landmark. After the zero point calibration is completed, start measuring, and when the water column is stationary, observe the scale corresponding to the water column liquid level, and record the liquid column height in the catheter at this time, which is the measured central venous pressure; observe the reading on the scale 1, and record the liquid column height in the catheter at this time; if continuous monitoring is required, the patient's condition can be evaluated by observing the trend of the liquid column; record the results of each measurement and compare them with previous measurements; analyze the trend of CVP, and adjust the infusion volume or other treatment measures according to the actual situation.

[0042] In summary, although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A central venous pressure measuring scale comprising a scale (1), characterized in that, The utility model also comprises a positioning ruler (2) and a fixing mechanism (3) which are detachably connected to the scale ruler (1); The positioning ruler (2) is rotationally connected with the scale ruler (1); The fixing mechanism (3) is used for fixing the scale ruler (1).

2. The central venous pressure scale according to claim 1, characterized in that The positioning ruler (2) comprises a positioning rod (21) and a telescopic rod (22); The positioning rod (21) is connected with the telescopic rod (22) through a hinged shaft (23), and the positioning rod (21) is rotationally connected with the scale ruler (1).

3. The central venous pressure scale according to claim 2, characterized in that The scale ruler (1) is provided with a rotating seat (11) and a limiting seat (12) for connecting the positioning ruler (2); The positioning rod (21) is provided with a clamping groove (24) matched with the limiting seat (12).

4. The central venous pressure scale of claim 3, wherein, The rotating seat (11) comprises a limiting rod (13) penetrating through the scale ruler (1); The limiting rod (13) penetrates through the positioning ruler (2) and is rotationally matched with the scale ruler (1).

5. The central venous pressure scale of claim 1, wherein, The fixing mechanism (3) comprises an elastic clamp (31) matched with the scale ruler (1) and a sliding seat (33); The sliding seat (33) is connected with the elastic clamp (31) at the front part, and a guide rail (34) is slidingly connected at the rear part; The guide rail (34) is provided with a locking arm (32).

6. The central venous pressure scale of claim 5, wherein, A locker is arranged between the guide rail (34) and the sliding seat (33); The locker comprises a locking handle (35) arranged outside the sliding seat (33).

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