A manual central venous pressure measuring device

Abstract

A central venous pressure manual measuring device relates to the technical field of central venous pressure measurement, including: measuring hose, vertical arrangement, the upper end of the measuring hose is the liquid inlet end, the lower end is the liquid outlet end, the side wall of the measuring hose is provided with a scale near the liquid inlet end, and the liquid flow rate switch is arranged on one end of the measuring hose near the liquid outlet end; And adjusting mechanism, including frame body, clamping assembly arranged at the bottom of the frame body and lifting assembly arranged on one side of the frame body in the vertical direction, the power output end of the lifting assembly is detachably connected with the liquid inlet end of the measuring hose; The device is simple and convenient to operate, and one person can complete the measurement operation of the central venous pressure, and the measurement efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of central venous pressure measurement technology, specifically to a manual central venous pressure measurement device. Background Technology

[0002] Central venous pressure (CVP) is the pressure at the point where the superior and inferior vena cava enter the right atrium. It is measured through catheters placed in the superior and inferior vena cava or right atrium. It reflects the right atrial pressure and is one of the main indicators for clinical observation of hemodynamics.

[0003] Currently, there are two main methods for measuring CVP in clinical practice: instrument measurement and manual measurement. Instrument measurement uses a transducer and pressure sensor connected to a multi-functional monitor. This method is more common in the ICU and allows for continuous monitoring of the patient's CVP. In general wards, manual measurement is usually used: First, connect the infusion set to normal saline. After draining the fluid, connect the infusion tubing to the normal saline connector. Then, remove the infusion tubing from the normal saline connector and fix it securely at the fourth rib along the mid-axillary line. The infusion tubing should be perpendicular to the body surface. Allow the fluid in the infusion tubing to drop until it stops, and then measure the height of the fluid column with a ruler.

[0004] However, the above manual measurement method requires two nurses to work together in actual operation. One nurse holds the IV set while the other uses a ruler to measure, which is very inconvenient and inefficient. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a manual central venous pressure measuring device to solve the problems of inconvenience and low efficiency in the manual measurement of central venous pressure in the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A manual central venous pressure measuring device, comprising:

[0008] A measuring hose, arranged vertically, has an inlet at the top and an outlet at the bottom. The side wall of the measuring hose near the inlet has graduations, and a flow rate switch is located at the outlet.

[0009] The adjustment mechanism includes a frame, a clamping assembly located at the bottom of the frame, and a lifting assembly located on one side of the frame in a vertical direction. The power output end of the lifting assembly is detachably connected to the liquid inlet end of the measuring hose.

[0010] Compared with existing technologies, this invention has the following advantages: In use, the clamping assembly is clamped and fixed to the guardrail on the side of the bed closest to the patient's heart. Then, the measuring tubing is connected to the power output end of the lifting assembly, and the lifting assembly is adjusted so that the zero mark on the measuring tubing is aligned with the height of the patient's right atrium (i.e., the fourth rib at the mid-axillary line on the left side of the patient's body). Then, saline solution is poured in from the inlet end of the measuring tubing until it flows out from the outlet end. The outlet end of the measuring tubing is then connected to the central venous catheter on the patient's body, and the addition of saline solution is stopped. At this point, the saline solution is slowly lowered by adjusting the flow rate switch. Once the saline solution stops falling, the scale is observed to obtain the central venous pressure value. The operation is simple and convenient; a single person can complete the measurement of central venous pressure, while also improving measurement efficiency.

[0011] Preferably, the frame includes a vertically arranged support and a top plate horizontally installed on top of the support, the clamping assembly is connected to the bottom of the support, and the lifting assembly is disposed between the top plate and the clamping assembly and is movably connected to the support.

[0012] Preferably, the lifting assembly includes a screw that is vertically rotatably installed between the top plate and the clamping assembly, a horizontally arranged connecting plate, and a knob located above the top plate. The screw freely passes through the top plate and is coaxially and fixedly connected to the knob. The connecting plate is horizontally arranged, with one end threadedly connected to the screw and the other end detachably connected to the liquid inlet of the measuring hose. A limiting component is provided between the connecting plate and the bracket.

[0013] Preferably, the bracket has a vertical groove on the side wall facing the connecting plate, and the limiting member includes a slider fixedly installed on the end of the connecting plate that is threadedly connected to the screw, and the slider is slidably engaged with the groove.

[0014] Preferably, the clamping assembly includes a U-shaped frame fixedly connected to the bottom of the bracket and two clamping members elastically installed between the inner and outer sides of the two opposing side walls of the U-shaped frame, with the clamping ends of the two clamping members located inside the U-shaped frame.

[0015] Preferably, each of the clamping components includes a vertically arranged limiting plate and a clamping plate. The limiting plate is located outside the U-shaped frame, and the clamping plate is located inside the U-shaped frame. The limiting plate and the clamping plate are fixedly connected by a plurality of connecting posts. The plurality of connecting posts freely penetrate the side wall of the U-shaped frame. Each connecting post is fitted with a spring. The spring is elastically connected between the clamping plate and the corresponding inner wall of the U-shaped frame. Elastic pads are fixedly installed on the opposing side walls of the clamping plates of the two clamping components.

[0016] Preferably, the connecting plate has a through hole at one end away from the bracket, and a rubber sleeve is fixedly installed on the upper part of the connecting plate coaxially with the through hole. The liquid inlet end of the measuring hose freely passes through the through hole and then passes through the rubber sleeve with an interference fit.

[0017] Preferably, a needle is installed on the inlet end of the measuring hose, and a threaded connector is connected to the outlet end of the measuring hose.

[0018] Preferably, the measuring hose has a filter screen installed inside it perpendicular to its axial direction, and the filter screen is located between the scale and the flow rate adjustment switch.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention.

[0021] Figure 2 for Figure 1 The front view of the clamping component.

[0022] The numbers in the diagram are as follows: 1. Measuring hose; 11. Needle; 12. Threaded connector; 13. Filter screen; 14. Scale; 2. Liquid flow rate switch; 3. Connecting plate; 31. Rubber sleeve; 32. Slider; 4. Bracket; 41. Slide groove; 42. Top plate; 43. U-shaped bracket; 5. Screw; 51. Knob; 6. Limiting plate; 7. Clamping plate; 71. Elastic pad; 8. Connecting column; 81. Spring. Detailed Implementation

[0023] To make the technical means, creative features, achieved objectives and functions of this utility model clearer and easier to understand, the utility model will be further described below with reference to the accompanying drawings and specific embodiments:

[0024] like Figure 1 As shown, an embodiment of this utility model provides a manual central venous pressure measuring device, including: a measuring hose 1, which is arranged vertically, with the upper end of the measuring hose 1 being the inlet end and the lower end being the outlet end, and a scale 14 provided on the side wall of the measuring hose 1 near the inlet end, and a liquid flow rate switch 2 provided on the end of the measuring hose 1 near the outlet end; and an adjusting mechanism, which includes a frame, a clamping assembly disposed at the bottom of the frame, and a lifting assembly disposed on one side of the frame in a vertical direction, wherein the power output end of the lifting assembly is detachably connected to the inlet end of the measuring hose 1.

[0025] The clamping assembly is clamped and fixed to the guardrail on the side of the bed closest to the patient's heart. Then, the measuring tubing 1 is connected to the power output end of the lifting assembly, and the lifting assembly is adjusted so that the zero mark 14 on the measuring tubing 1 is aligned with the height of the patient's right atrium (i.e., the fourth rib at the mid-axillary line on the left side of the patient's body). Then, normal saline is poured in from the inlet end of the measuring tubing 1 until it flows out from the outlet end. Immediately afterward, the outlet end of the measuring tubing 1 is connected to the central venous catheter on the patient's body, and the addition of normal saline is stopped. At this time, the normal saline is slowly lowered by adjusting the fluid flow rate switch 2. When the normal saline stops falling, the scale 14 is observed to obtain the central venous pressure value. The operation is simple and convenient, and a single person can complete the measurement of central venous pressure, while improving the measurement efficiency.

[0026] like Figure 1-2 As shown, according to another embodiment of the present invention, the central venous pressure manual measuring device further optimizes the frame, lifting assembly and clamping assembly included therein. The frame includes a vertically arranged support 4 and a top plate 42 horizontally installed on the top of the support 4. The clamping assembly is connected to the bottom of the support 4. The lifting assembly is disposed between the top plate 42 and the clamping assembly and is movably connected to the support 4.

[0027] The lifting assembly includes a screw 5 vertically rotatably mounted between the top plate 42 and the clamping assembly, a horizontally arranged connecting plate 3, and a knob 51 positioned above the top plate 42. The screw 5 freely passes through the top plate 42 and is coaxially and fixedly connected to the knob 51. The connecting plate 3 is horizontally arranged, with one end threadedly connected to the screw 5 and the other end detachably connected to the inlet end of the measuring hose 1. A limiting component is provided between the connecting plate 3 and the bracket 4. The bracket 4 has a vertically formed groove 41 on its side wall facing the connecting plate 3. The limiting component includes a slider 32 fixedly mounted on the end of the connecting plate 3 that is threadedly connected to the screw 5. The slider 32 is slidably engaged with the groove 41. Rotating the knob 51 drives the screw 5 to rotate, and the limiting component ensures that the screw 5 drives the connecting plate 3 to move vertically, thereby driving the measuring hose 1 to move synchronously.

[0028] Preferably, the connecting plate 3 has a vertical through hole at one end away from the bracket 4, and a rubber sleeve 31 is fixedly installed on the upper part of the connecting plate 3 coaxially with the through hole. The liquid inlet end of the measuring hose 1 freely passes through the through hole and then passes through the rubber sleeve 31 with an interference fit. This allows the measuring hose 1 to be replaced at any time. The degree of interference fit between the rubber sleeve 31 and the measuring hose 1 is sufficient to clamp and fix the measuring hose 1 when it is stationary, and to remove it with a little force when replacing the measuring hose 1.

[0029] The clamping assembly includes a U-shaped frame 43 fixedly connected to the bottom of the bracket 4 and two clamping members elastically installed between the inner and outer sides of two opposing side walls of the U-shaped frame 43. The clamping ends of the two clamping members are located inside the U-shaped frame 43. Each clamping member includes a vertically arranged limiting plate 6 and a clamping plate 7. The limiting plate 6 is located outside the U-shaped frame 43, and the clamping plate 7 is located inside the U-shaped frame 43. The limiting plate 6 and the clamping plate 7 are fixedly connected by a plurality of connecting posts 8. The plurality of connecting posts 8 freely penetrate through the side walls of the U-shaped frame 43. Each connecting post 8 is fitted with a spring 81. The spring 81 is elastically connected between the clamping plate 7 and the corresponding inner wall of the U-shaped frame 43. Elastic pads 71 ​​are fixedly installed on the opposing side walls of the clamping plates 7 of the two clamping members.

[0030] During the clamping process, the two elastic pads 71 ​​contact the bed rails, which can prevent the clamping plate 7 from directly contacting the bed rails and causing wear between them. Moreover, the elastic force provided by the spring 81 on each connecting column 8 can ensure a stable clamping force.

[0031] like Figure 1 As shown, according to another embodiment of the present invention, the central venous pressure manual measuring device preferably has a needle 11 installed on the inlet end of the measuring tubing 1 and a threaded connector 12 connected to the outlet end of the measuring tubing 1; the needle 11 can be inserted into the saline bottle to facilitate the drainage of saline; while the threaded connector 12 facilitates the threaded connection with the central venous catheter in the patient's body to ensure the stability of the connection during the measurement process.

[0032] like Figure 1 As shown, according to another embodiment of the present invention, the central venous pressure manual measuring device preferably has a filter screen 13 disposed inside the measuring hose 1 perpendicular to its axial direction. The filter screen 13 is located between the scale 14 and the flow rate adjustment switch. The filter screen 13 can perform simple filtration of physiological saline to prevent impurities from entering the central venous catheter.

[0033] The working principle of this utility model is as follows: When using this utility model, the end of the measuring hose 1 with the needle 11 is passed through the through hole and the rubber sleeve 31, so that the rubber sleeve 31 and the measuring hose 1 are interference-fitted. Then, the two elastic pads 71 ​​are clamped on the guardrail of the hospital bed near the patient's heart to fix the position of the entire measuring device. Then, the knob 51 is turned to drive the screw 5 to rotate. Due to the limiting cooperation between the slider 32 and the slide groove 41, the screw 5 can drive the connecting plate 3 to move in the vertical direction, so that the zero mark 14 on the measuring hose 1 is reached. The line is aligned with the height of the patient's right atrium (i.e., the fourth rib at the mid-axillary line on the left side of the patient's body). Then, the needle 11 is inserted into the saline bottle, and the fluid flow rate switch 2 is turned on, allowing the saline to flow through the entire measuring tubing 1 and out from the threaded connector 12 to expel air. Immediately afterwards, the threaded connector 12 is connected to the central venous catheter on the patient's body, and the saline bottle is removed. At the same time, the fluid flow rate switch 2 is adjusted to allow the saline to slowly decrease. When the saline stops decreasing, the scale 14 is observed to obtain the central venous pressure value.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A manual central venous pressure measuring device, characterized in that, include: A measuring hose (1) is arranged vertically, with its upper end being the inlet and its lower end being the outlet. The measuring hose (1) has a scale (14) on its side wall near the inlet, and a liquid flow rate switch (2) on its end near the outlet. The adjustment mechanism includes a frame, a clamping assembly located at the bottom of the frame, and a lifting assembly located on one side of the frame in a vertical direction. The power output end of the lifting assembly is detachably connected to the liquid inlet end of the measuring hose (1).

2. The manual central venous pressure measuring device according to claim 1, characterized in that, The frame includes a vertically arranged support (4) and a top plate (42) horizontally installed on the top of the support (4). The clamping assembly is connected to the bottom of the support (4). The lifting assembly is arranged between the top plate (42) and the clamping assembly and is movably connected to the support (4).

3. A manual central venous pressure measuring device according to claim 2, characterized in that, The lifting assembly includes a screw (5) that is vertically rotatably installed between the top plate (42) and the clamping assembly, a horizontally arranged connecting plate (3), and a knob (51) located above the top plate (42). The screw (5) freely passes through the top plate (42) and is coaxially fixedly connected to the knob (51). The connecting plate (3) is horizontally arranged, with one end of the connecting plate (3) threadedly connected to the screw (5) and the other end detachably connected to the liquid inlet end of the measuring hose (1). A limiting component is provided between the connecting plate (3) and the bracket (4).

4. A manual central venous pressure measuring device according to claim 3, characterized in that, The bracket (4) has a vertical groove (41) on the side wall facing the connecting plate (3). The limiting member includes a slider (32) fixedly installed on the end of the connecting plate (3) that is threadedly connected to the screw (5). The slider (32) is slidably engaged with the groove (41).

5. A manual central venous pressure measuring device according to claim 3, characterized in that, The clamping assembly includes a U-shaped frame (43) fixedly connected to the bottom of the bracket (4) and two clamping members that are elastically installed between the inner and outer sides of the two opposing side walls of the U-shaped frame (43), with the clamping ends of the two clamping members located inside the U-shaped frame (43).

6. A manual central venous pressure measuring device according to claim 5, characterized in that, Each clamping member includes a vertically arranged limiting plate (6) and a clamping plate (7). The limiting plate (6) is located outside the U-shaped frame (43), and the clamping plate (7) is located inside the U-shaped frame (43). The limiting plate (6) and the clamping plate (7) are fixedly connected by several connecting posts (8). The several connecting posts (8) freely penetrate the side wall of the U-shaped frame (43). Each connecting post (8) is fitted with a spring (81). The spring (81) is elastically connected between the clamping plate (7) and the corresponding inner wall of the U-shaped frame (43). Elastic pads (71) are fixedly installed on the two opposing side walls of the clamping plates (7) of the two clamping members.

7. A manual central venous pressure measuring device according to claim 3, characterized in that, The connecting plate (3) has a vertical through hole at one end away from the bracket (4). A rubber sleeve (31) is fixedly installed on the upper part of the connecting plate (3) coaxially with the through hole. The liquid inlet end of the measuring hose (1) freely passes through the through hole and then passes through the rubber sleeve (31) with an interference fit.

8. A manual central venous pressure measuring device according to claim 1, characterized in that, A needle (11) is installed on the inlet end of the measuring hose (1), and a threaded connector (12) is connected to the outlet end of the measuring hose (1).

9. A manual central venous pressure measuring device according to claim 1, characterized in that, The measuring hose (1) has a filter screen (13) installed inside perpendicular to its axial direction. The filter screen (13) is located between the scale (14) and the flow rate adjustment switch.

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