Central venous pressure measuring device

Abstract

The utility model discloses a central venous pressure measuring device, and relates to the field of medical instruments. The central venous pressure measuring device comprises an infusion tube, a puncture head used for being connected with an infusion bottle in an inserted mode is arranged at the upper end of the infusion tube, the tail end of the infusion tube is detachably connected to an indwelling tube on the body of a patient, the central venous pressure measuring device further comprises a reversing valve and a measuring scale, and the measuring scale comprises a fixed scale and a telescopic scale. The upper end part of the fixed ruler is fixedly connected to the side of the reversing valve; the plurality of extension rulers are connected with the fixed ruler in an ascending and descending manner; the reversing valve adopts a two-position three-way reversing valve, the reversing valve is positioned below the puncture head and is provided with a liquid inlet, a liquid outlet and an exhaust port, the liquid inlet and the liquid outlet are respectively communicated with the infusion tube, and the inside of the infusion tube can be communicated with external atmospheric pressure by switching the working state of the reversing valve. The central venous pressure measuring device can be operated by a single medical worker, so that the labor cost can be saved.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a central venous pressure measuring device. Background Art

[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 a catheter 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. It is affected by three factors: cardiac function, circulating blood volume, and vascular tension. The blood pressure in the right atrium and the large veins in the chest cavity is usually called central venous pressure.

[0003] There are two commonly used methods for measuring CVP. One is to use a transducer, which is easy to operate and accurate in measurement, but the cost is relatively high. The other is to connect the infusion tube to the atmosphere, take the intersection of the mid-axillary line and the fourth rib as the zero point, and then use a ruler to measure the height of the liquid level in the infusion tube. However, when connecting the infusion tube to the atmosphere, it is generally necessary to separate the puncture head of the infusion tube from the bottle stopper of the infusion bottle, and then the measurer holds the infusion tube with one hand, and another nurse assists in observing the falling speed and stop position of the liquid level in the infusion tube, and finally records the measurement results. This measurement method is low in cost, but has the following disadvantages: when measuring, two medical staff are required to assist in the measurement, which increases their labor costs and is inconvenient to operate; at the same time, when the puncture head of the infusion tube is exposed to the air, it is easy to cause indirect contamination. Utility Model Content

[0004] The technical problem to be solved by the present application is to provide a central venous pressure measuring device that can be operated by a single medical staff member, thus saving manpower costs.

[0005] In order to solve the above technical problems, this application adopts the following technical solutions:

[0006] A central venous pressure measuring device comprises an infusion tube, wherein a puncture head for inserting an infusion bottle is arranged at the upper end of the infusion tube, and the end of the infusion tube is detachably connected to an indwelling tube on a patient's body, and the distinguishing feature is that it also comprises a reversing valve and a measuring ruler, wherein the measuring ruler comprises a fixed ruler and a telescopic ruler, wherein the upper end of the fixed ruler is fixedly connected to the side of the reversing valve; wherein the telescopic ruler is provided with a plurality of pieces, and the plurality of telescopic rulers are connected to the fixed ruler in a manner that they can rise and fall; wherein the reversing valve adopts a two-position three-way reversing valve, wherein the reversing valve is located below the puncture head, and wherein a liquid inlet, a liquid outlet and an exhaust port are arranged, wherein the liquid inlet and the liquid outlet are respectively connected to the infusion tube, and wherein switching the working state of the reversing valve can make the inside of the infusion tube connected to the external atmospheric pressure.

[0007] In some embodiments, the interiors of the fixed ruler and the telescopic ruler are hollow, and the lower ends of the interiors thereof are connected to the outside, and several telescopic rulers can be mutually sleeved and installed inside the fixed ruler; the upper side walls of the several telescopic rulers are all provided with elastic limit blocks, and the fixed ruler and the lower sides of the several telescopic rulers facing the elastic limit blocks are provided with limit holes; by pulling down the telescopic ruler, the elastic limit blocks of the telescopic ruler can be snapped into the limit holes of the measuring ruler sleeved on the outside thereof.

[0008] Compared with the prior art, the present application achieves at least the following beneficial effects: by providing a reversing valve and a measuring ruler on the infusion tube, the present application enables a single medical staff member to complete the measurement of the patient's central venous pressure, thereby avoiding the dilemma of requiring one person to hold the pulled-out puncture head while another person holds the measuring ruler to measure the central venous pressure, thereby effectively reducing the expenditure and waste of labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] One or more embodiments of the present application will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0010] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0011] Figure 2 for Figure 1 A schematic diagram of the structure of the measuring ruler of the embodiment when in use;

[0012] Figure 3 for Figure 2 A cross-sectional view of a measuring ruler of an embodiment;

[0013] Figure 4 This is a functional symbol diagram of the reversing valve according to an embodiment of the present application.

[0014] The numbers in the figure are: 1. infusion tube; 2. puncture head; 3. reversing valve; 31. liquid inlet; 32. liquid outlet; 33. exhaust port; 4. measuring ruler; 41. fixed ruler; 42. telescopic ruler; 5. elastic limit block; 6. limit hole; 7. drip bucket; 8. flow regulator; 9. indwelling tube connector. DETAILED DESCRIPTION

[0015] The present application will be described in detail below with reference to the exemplary embodiments in the accompanying drawings. However, it should be understood that the present application can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. These embodiments are provided here to make the disclosure of the present application more complete and to fully convey the concept of the present application to those skilled in the art.

[0016] In the description of the present application, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present application.

[0017] like Figures 1 to 4 As shown, the central venous pressure measuring device of an embodiment of the present application includes an infusion tube 1, a reversing valve 3 and a measuring ruler 4.

[0018] Among them, the infusion tube 1 includes a puncture head 2, a drip bucket 7, a flow regulator 8 and an indwelling tube connector 9. Specifically, the puncture head 2, the drip bucket 7, the flow regulator 8 and the indwelling tube connector 9 are connected to the infusion tube 1 in sequence from top to bottom. The puncture head 2 is used to plug in the infusion bottle, and the indwelling tube connector 9 at the end of the infusion tube 1 can be removed from the indwelling tube connected to the patient's body.

[0019] The outside of the measuring ruler 4 is provided with scales, and the values ​​decrease from top to bottom. Figure 2 Specifically, the measuring ruler 4 includes a fixed ruler 41 and a telescopic ruler 42, and the upper end of the fixed ruler 41 is fixedly connected to the side of the reversing valve 3. There are several telescopic rulers 42, and the several telescopic rulers 42 can be connected to the fixed ruler 41 in a manner of rising and falling. In this embodiment, when the telescopic ruler 42 is pulled down, its pulled-down length is equal to the length of the infusion tube 1. The reversing valve 3 adopts a two-position three-way manual reversing valve 3, which is located on the infusion tube 1 between the puncture head 2 and the drip bucket 7. The reversing valve 3 is provided with a liquid inlet 31, a liquid outlet 32 ​​and an exhaust port 33. The liquid inlet 31 and the liquid outlet 32 ​​are respectively connected to the infusion tube 1. When the working state of the reversing valve 3 is manually switched, that is, when the liquid outlet 32 ​​and the exhaust port 33 are connected, the inside of the infusion tube 1 can be connected to the external atmospheric pressure.

[0020] refer to Figure 3 Specifically, the interior of the fixed ruler 41 and the telescopic ruler 42 is hollow, and the lower ends of the interiors thereof are connected to the outside. Several telescopic rulers 42 can be mutually sleeved and installed inside the fixed ruler 41. The upper side walls of the several telescopic rulers 42 are all provided with elastic limit blocks 5, and the lower sides of the fixed ruler 41 and the several telescopic rulers 42 facing the elastic limit blocks 5 are provided with limit holes 6. Pulling down the telescopic ruler 42 can make the elastic limit blocks 5 of the telescopic ruler 42 snap into the limit holes 6 sleeved on the external measuring ruler 4 thereof.

[0021] The method of using the central venous pressure measuring device is as follows: under normal circumstances, the liquid inlet 31 and the liquid outlet 32 ​​of the reversing valve 3 are in a normally connected state with the infusion tube 1; when the central venous pressure needs to be measured, the medical staff manually switches the handle of the reversing valve 3 to switch the normally connected state between the medicine bottle and the infusion tube 1 to a state where the infusion tube 1 is connected to the external atmospheric pressure. At this time, the medicine bottle will stop the infusion state, and the inside of the infusion tube 1 will be connected to the external atmospheric pressure through the channel connecting the liquid outlet 32 ​​and the exhaust port 33, so that the air pressure inside the infusion tube 1 is the same as the atmospheric pressure. When the liquid level in the infusion tube 1 drops to a stop, the medical staff then pulls down the measuring ruler 4 so that the 0-point scale of the measuring ruler 4 is pulled to the height of the patient's central venous zero point, that is, the intersection of the mid-axillary line and the fourth rib. Finally, it is observed that the scale of the measuring ruler 4 corresponding to the liquid level is the value to be measured, thereby achieving the effect that the medical staff can complete the operation alone. When the measurement is completed, the medical staff first disconnects the indwelling tube connector 9 at the end of the infusion tube 1 from the indwelling tube on the patient's body, and then switches the reversing valve 3 back to the normal state of the medicine bottle and the infusion tube 1. After the infusion tube 1 is emptied, the infusion tube 1 can be connected back to the indwelling tube on the patient.

[0022] It should be understood that all the above embodiments are illustrative rather than restrictive, and various modifications or variations made by those skilled in the art to the specific embodiments described above based on the concept of the present application should all be within the protection scope of the present application.

Claims

1. A central venous pressure measuring device, comprising an infusion tube (1), wherein the upper end of the infusion tube (1) is provided with a puncture head (2) for plugging an infusion bottle, and the end of the infusion tube (1) is detachably connected to an indwelling tube on a patient's body, characterized in that: The invention also comprises a reversing valve (3) and a measuring ruler (4), wherein the measuring ruler (4) comprises a fixed ruler (41) and a telescopic ruler (42), wherein the upper end of the fixed ruler (41) is fixedly connected to the side of the reversing valve (3); a plurality of telescopic rulers (42) are provided, and the plurality of telescopic rulers (42) are connected to the fixed ruler (41) in a manner that they can rise and fall; the reversing valve (3) is a two-position three-way reversing valve, and the reversing valve (3) is located below the puncture head (2), and is provided with a liquid inlet (31), a liquid outlet (32) and an exhaust port (33), wherein the liquid inlet (31) and the liquid outlet (32) are respectively connected to the infusion tube (1), and the inside of the infusion tube (1) can be connected to the external atmospheric pressure by switching the working state of the reversing valve (3).

2. The central venous pressure measuring device according to claim 1, characterized in that: The interiors of the fixed ruler (41) and the telescopic ruler (42) are hollow, and the lower ends of the interiors thereof are both connected to the outside. The plurality of telescopic rulers (42) can be mutually sleeved and installed inside the fixed ruler (41); the upper side walls of the plurality of telescopic rulers (42) are each provided with an elastic limiting block (5); the lower sides of the fixed ruler (41) and the plurality of telescopic rulers (42) facing the elastic limiting block (5) are provided with limiting holes (6); when the telescopic ruler (42) is pulled down, the elastic limiting block (5) of the telescopic ruler (42) can be inserted into the limiting hole (6) sleeved on the external measuring ruler (4) thereof.

3. The central venous pressure measuring device according to claim 2, characterized in that: The outside of the measuring ruler (4) is provided with scales, the values ​​of which decrease in sequence from top to bottom.

4. The central venous pressure measuring device according to claim 3, characterized in that: The infusion tube (1) further comprises a dripping funnel (7), a flow regulator (8) and an indwelling tube connector (9); the puncture head (2), the dripping funnel (7), the flow regulator (8) and the indwelling tube connector (9) are connected to the infusion tube (1) in sequence from top to bottom; the reversing valve (3) is connected to the infusion tube (1) between the puncture head (2) and the dripping funnel (7); and the indwelling tube connector (9) is connected to an indwelling tube on the patient's body.

5. The central venous pressure measuring device according to claim 4, characterized in that: The reversing valve (3) is a two-position three-way manual reversing valve.

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