Central venous pressure measuring device

Abstract

The utility model discloses a central venous pressure measuring device, and belongs to the technical field of central venous pressure measurement. A central venous pressure measuring device comprises an infusion tube, a puncture outfit for puncturing a normal saline bag is arranged at one end of the infusion tube, a drip chamber and a flow regulator for controlling the flow of the drip chamber are arranged on the infusion tube, and a three-way valve is connected to the end, away from the puncture outfit, of the infusion tube. The other two interfaces of the three-way valve are movably connected with a piezometric tube and a venous catheter connected with a central vein; the central venous pressure measuring tube can be used for directly measuring the central venous pressure of a patient, medical staff do not need to disassemble and assemble other tubes, and the problems that the number of consumed materials is large, operation is complex, and infection is caused by contact with bacteria easily during central venous pressure measurement are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of central venous pressure measurement, in particular to a central venous pressure measurement device. Background Art

[0002] Central venous pressure is the pressure at the entrance of the superior and inferior vena cava into the right atrium, measured through an indwelling catheter in the superior and inferior vena cava or the right atrium. It reflects the right atrial pressure and is one of the main indicators for clinical hemodynamic observation, affected by three factors: cardiac function, circulating blood volume, and vascular tone. Generally, the blood pressure in the right atrium and the large veins in the thoracic cavity is called central venous pressure.

[0003] Currently, there is no dedicated device for measuring central venous pressure in hospitals. Each time it needs to be handmade, which not only increases the workload of medical staff, but also makes it very easy for the device to come into contact with bacteria during production. Moreover, too many tubes are required during use, and inexperienced medical staff are prone to errors during use, and the measurement consumables are numerous. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problems existing in the prior art, and to propose a central venous pressure measurement device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A central venous pressure measurement device includes an infusion tube. One end of the infusion tube is provided with a puncture device for puncturing a physiological saline bag. A drip chamber and a flow regulator for controlling the flow rate of the drip chamber are arranged on the infusion tube. The end of the infusion tube far from the puncture device is connected to a three-way valve. The other two interfaces of the three-way valve are movably connected to a pressure measuring tube and a venous catheter connected to the central vein.

[0007] Preferably, an exhaust pipe is communicated with the outside of the puncture device, and an exhaust valve is arranged at the end of the exhaust pipe far from the puncture device.

[0008] Preferably, the end of the pressure measuring tube far from the three-way valve is connected to a piston cover. The piston cover includes a rubber connecting piece connected to the end of the pressure measuring tube and a rubber stopper connected to the rubber connecting piece. The outer side wall of the rubber stopper is movably abutted against the inner side wall of the pressure measuring tube.

[0009] Preferably, scale lines are arranged on the pressure measuring tube.

[0010] Preferably, the length range of the pressure measuring tube is 30 - 40 cm.

[0011] Preferably, the three-way valve includes a valve body, a sealing ring movably connected in the valve body, a sphere arranged in the sealing ring for controlling the liquid flow direction, and a handle connected to the sphere and rotating on the valve body.

[0012] Preferably, it further includes a support frame, on which a support rod and a hook for hanging a physiological saline bag are provided, and the pressure relief tube is placed in a fitting manner outside the support rod.

[0013] Compared with the prior art, the present utility model provides a central venous pressure measuring device, which has the following beneficial effects:

[0014] 1. For this central venous pressure measuring device, by combining the infusion tube, the pressure measuring tube and the venous catheter through a three-way valve, the central venous pressure of the patient can be directly measured without the medical staff disassembling and assembling other tubes, solving the problems of many consumables, complex operation and easy contact with bacteria leading to infection during the measurement of central venous pressure. Description of the Drawings

[0015] Figure 1 is a structural schematic diagram of the present utility model;

[0016] Figure 2 is a sectional structural schematic diagram of the three-way valve of the present utility model;

[0017] Figure 3 is a structural schematic diagram of the pressure relief tube of the present utility model;

[0018] Figure 4 is a structural schematic diagram of the present utility model when used in cooperation with the support frame.

[0019] In the figure: 1. Infusion tube; 101. Drip chamber; 102. Flow regulator; 2. Puncture device; 3. Three-way valve; 301. Valve body; 302. Sealing ring; 303. Sphere; 304. Handle; 4. Pressure measuring tube; 401. Scale line; 5. Venous catheter; 6. Pressure relief tube; 7. Piston cover; 701. Rubber connecting piece; 702. Rubber stopper; 8. Support frame; 801. Support rod; 802. Hook. Detailed Embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model; obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] Example: Refer to Figures 1-4 , a central venous pressure measuring device, including an infusion tube 1. A puncture device 2 for puncturing a physiological saline bag is provided at the upper end of the infusion tube 1. An exhaust pipe 6 is communicated with the outside of the puncture device 2, and an exhaust valve is provided at one end of the exhaust pipe 6 away from the puncture device 2. In this embodiment, a piston cover 7 is connected to the end of the pressure measuring tube 4 away from the three-way valve 3. The piston cover 7 includes a rubber connecting piece 701 connected to the end of the pressure measuring tube 4 and a rubber plug 702 connected to the rubber connecting piece 701. The rubber plug 702 adopts a boss structure, and the outer side wall of the rubber plug 702 is in movable contact with the inner side wall of the pressure measuring tube 4. A drip chamber 101 and a flow regulator 102 for controlling the flow rate of the drip chamber 101 are provided on the infusion tube 1. One end of the infusion tube 1 away from the puncture device 2 is connected to a three-way valve 3. The three-way valve 3 includes a valve body 301, a sealing ring 302 movably connected in the valve body 301, a sphere 303 provided in the sealing ring 302 for controlling the liquid flow direction, and a handle 304 connected to the sphere 303 and rotating on the valve body 301. The other two interfaces of the three-way valve 3 are movably connected to a pressure measuring tube 4 and a venous catheter 5 connected to the central vein. Scale lines 401 are provided on the pressure measuring tube 4, and the length range of the pressure measuring tube 4 is 30 - 40 cm.

[0024] The measuring device of this embodiment further includes a support frame 8. A support rod 801 and a hook 802 for hanging the physiological saline bag are provided on the support frame 8. The pressure relief pipe 6 is placed in contact with the outside of the support rod 801.

[0025] Specifically, during use, the manometer tube 4 is vertically placed against the support rod 801, such that the zero position at the bottom of the scale line 401 of the manometer tube 4 is parallel to the right atrium horizontal axillary midline at the fourth intercostal space of the patient. Then, the normal saline bag is hung on the hook 802 of the support frame 8, and the infusion tube 1 is connected to the normal saline bag through the puncture device 2. The patient is connected to the venous catheter 5 through the infusion tube 1 for fluid replacement. When measuring the central venous pressure, first control the venous catheter 5 to be closed through the three-way valve 3, connect the infusion tube 1 to the manometer tube 4, fill the manometer tube 4 with the liquid in the infusion tube 1 to a level higher than the expected central venous pressure, then close the infusion tube 1 through the three-way valve 3, open the venous catheter 5, connect the manometer tube 4 to the venous catheter 5, and the liquid in the manometer tube 4 will rapidly drop. When it no longer drops at a certain level, observe the corresponding scale value between the liquid level and the scale line 401 of the manometer tube 4, which is the value of CVP. When not measuring, close the manometer tube 4, make the venous catheter 5 communicate with the infusion tube 1, and continue fluid replacement.

[0026] In this application, the infusion tube 1, the manometer tube 4, and the venous catheter 5 are combined through the three-way valve 3, enabling direct measurement of the central venous pressure of the patient without the need for medical staff to disassemble and assemble other tubes before measuring the central venous pressure, solving the problems of excessive consumables, complex operation, and easy contact with bacteria leading to infection during central venous pressure measurement.

[0027] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent replacements or changes should be covered within the protection scope of the present utility model.

Claims

1. A central venous pressure measuring device, comprising an infusion tube (1), characterized in that, One end of the infusion tube (1) is provided with a puncture device (2) for puncturing a physiological saline bag. A drip chamber (101) and a flow regulator (102) for controlling the flow rate of the drip chamber (101) are arranged on the infusion tube (1). The end of the infusion tube (1) far from the puncture device (2) is connected with a three-way valve (3). The other two interfaces of the three-way valve (3) are movably connected with a pressure measuring tube (4) and a venous catheter (5) connected to the central vein.

2. The central venous pressure measuring device according to claim 1, wherein, An exhaust pipe (6) is communicated with the outside of the puncture device (2). An exhaust valve is arranged at the end of the exhaust pipe (6) far from the puncture device (2).

3. The central venous pressure measuring device according to claim 2, wherein, One end of the pressure measuring tube (4) far from the three-way valve (3) is connected with a piston cover (7). The piston cover (7) includes a rubber connecting piece (701) connected to the end of the pressure measuring tube (4) and a rubber stopper (702) connected to the rubber connecting piece (701). The outer side wall of the rubber stopper (702) is movably abutted against the inner side wall of the pressure measuring tube (4).

4. The central venous pressure measuring device according to claim 1, wherein, Scale lines (401) are arranged on the pressure measuring tube (4).

5. The central venous pressure measuring device according to claim 4, wherein, The length range of the pressure measuring tube (4) is 30 - 40 cm.

6. The central venous pressure measuring device according to claim 1, wherein The three-way valve (3) includes a valve body (301), a sealing ring (302) movably connected in the valve body (301), a sphere (303) arranged in the sealing ring (302) for controlling the liquid flow direction, and a handle (304) connected to the sphere (303) and rotating on the valve body (301).

7. The central venous pressure measuring device according to claim 2, characterized in that, It further includes a support frame (8). A support rod (801) and a hook (802) for hooking the physiological saline bag are arranged on the support frame (8). The exhaust pipe (6) is closely attached to the outside of the support rod (801).

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