CN201894642U - Central venous pressure (CVP) measuring instrument - Google Patents

Abstract

The utility model discloses a measuring instrument for central venous pressure, which comprises a drip funnel and a pressure measuring tube connected to both ends of the drip funnel. A scale is arranged on the pressure measuring tube, and a filter connector is also arranged on the dropping funnel. Since the filter connector is arranged on the dropping funnel, it can prevent the pressure measuring liquid medium in the dropping funnel from being directly connected with the outside air, avoiding the pollution of the liquid medium, and meeting the aseptic requirement. At the same time, a scale is set on the pressure measuring tube at the lower part of the dropping funnel, which can be directly read, which is convenient to use and reduces operating errors. Moreover, the central venous pressure measuring instrument has the advantages of simple structure, low cost and strong universal applicability.

Description

Central Venous Pressure Meter

technical field

The utility model relates to a medical device, in particular to a device for measuring central venous pressure.

Background technique

Central venous pressure (CVP) refers to the pressure in the superior and inferior vena cava or the right atrium. It is an important index for evaluating blood volume, right ventricular preload and right ventricular function. The normal value is 5-12cmH ₂ 0. A low CVP indicates hypovolemia or obstructed venous return and should be given fluids. A high CVP indicates excessive fluid intake or cardiac insufficiency. With the development of medical science, the detection of central venous pressure has been widely used clinically, especially in the first aid of critically ill patients. It has also become an indispensable important diagnosis and treatment measure in clinical work. At present, there are mainly three methods for clinical measurement of central venous pressure: traditional measurement method, pressure sensor dynamic detection method and bedside simple central venous pressure measurement method. However, the measurement process of the traditional assay method is cumbersome and requires a lot of material preparation, requiring at least two people to complete the operation. The pressure sensor dynamic detection method to measure CVP has the advantages of reliable measurement results and continuous detection. However, the equipment requires high equipment and is expensive, so it is difficult to use in general wards; and it is prone to complications. Therefore, the bedside simple central venous pressure measurement method is widely used in general wards because of its convenient operation and low cost.

The bedside simple central venous pressure measurement method mainly includes the following steps: (1) Equipment preparation: 1 ruler with scale, 1 bottle of 500 mL normal saline; Physiological saline replaces the liquid being infused; the three-lumen catheter needs to close the other two catheters, keep one tube connected to the normal saline, and quickly infuse the normal saline to flush the venous pipeline to ensure the accuracy of CVP. (3) Reading: When the liquid in the infusion tube drops to a certain level and stops falling, the vertical distance between the liquid level in the infusion tube and the midaxillary line (unit cmH ₂ O) is is the CVP value.

In actual work, when the central venous pressure is measured by the bedside simple central venous pressure measurement method, pulling out the infusion needle on the infusion bottle will cause the infusion tube to directly communicate with the atmospheric pressure, which cannot meet the minimum requirements for sterility. In addition, when using a ruler to read the scale, two hands are required to straighten the soft infusion tube and measure with a scale, which still requires at least two people to complete the operation, which is very inconvenient to use and prone to errors.

In view of the above deficiencies, it is necessary to develop a new central venous measuring instrument, which can not only reduce the cost, but also meet the sterility requirements, and reduce human operation errors, and one person can complete the measurement, which is easy to operate.

Contents of the invention

In view of this, the purpose of this utility model is to provide a central venous measuring instrument, which can not only reduce the error, but also meet the sterility requirement.

The purpose of this utility model is achieved through the following technical solutions: a central venous pressure measuring instrument, comprising a drip funnel and a pressure measuring tube connected to both ends of the dropping funnel, the pressure measuring tube in the upper section of the dropping funnel is provided with a pressure measuring tube The tube opening and closing valve, the pressure measuring tube of the lower part of the dropping funnel is provided with a scale, and the dropping funnel is also provided with a filter connector.

Further, there is a detachable connection between the filter connector and the dropping funnel;

Further, there is a detachable connection between the scale and the pressure measuring tube;

Further, the scale is a hard scale with an arc-shaped cross section;

Further, the filter connector is a needle filter connector.

Beneficial effects of the present utility model: the central venous pressure measuring instrument of the present utility model comprises a drip funnel and a pressure measuring tube connected to both ends of the drip funnel, a clip is arranged on the pressure measuring tube of the upper section of the drip funnel, and a clamp is arranged on the pressure measuring tube of the lower section of the drip funnel. A scale is arranged on the pressure measuring tube, and a filter connector is also arranged on the dropping funnel. Since the filter connector is arranged on the dropping funnel, it can prevent the pressure measuring liquid medium in the dropping funnel from being directly connected with the outside air, avoiding the pollution of the liquid medium, and meeting the aseptic requirement. At the same time, a scale is set on the pressure measuring tube at the lower part of the dropping funnel, which can be directly read, which is convenient to use and reduces operating errors. Moreover, the central venous pressure measuring instrument has the advantages of simple structure, low cost and strong universal applicability.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Accompanying drawing 1 is the structural representation of the utility model;

Accompanying drawing 2 is a schematic cross-sectional view along A-A in Fig. 1 .

Detailed ways

Accompanying drawing 1 is a schematic structural view of the utility model; Accompanying drawing 2 is a schematic cross-sectional view along A-A in Fig. 1 . As shown in the figure: a central venous pressure measuring instrument, including a drip funnel 1 and a pressure measuring tube 2 connected to both ends of the drip funnel 1, the upper section of the drip funnel 1 (the upper and lower directions referred to in the utility model are Refers to the upper section and the lower section of the pressure measuring tube during measurement) The pressure measuring tube opening and closing valve 3 is arranged on the pressure measuring tube. Chi 4, the dripping funnel 1 is also provided with a filter connector 5. The method of using the central venous pressure measuring instrument of the utility model is as follows: the patient takes a supine position, connects the central venous catheter to the lower end of the pressure measuring tube 2, and connects the upper end of the pressure measuring tube 2 to the liquid collection bottle, which contains physiological saline, When measuring, first fill the pressure measuring tube 2 and the dropping funnel 1 with physiological saline, tighten the pressure measuring tube with the clamp 3, seal the pressure measuring tube at the upper end of the dropping funnel, and then open the filter connector 5, at this time the pressure measuring tube and the atmospheric pressure In the same way, align the zero scale of the scale on the pressure measuring tube with the fourth intercostal space of the midaxillary line, and the liquid level will naturally drop under the action of atmospheric pressure. When the liquid level drops to a slight fluctuation and no longer drops, read the pressure measurement The scale on the scale on the tube is the CVP value. Since the filter connector 5 is arranged on the dripping funnel 1, the pressure measuring liquid medium in the dripping funnel can be prevented from directly contacting with the outside air, the contamination of the liquid medium is avoided, and the aseptic requirement is met. At the same time, a scale is set on the pressure measuring tube at the lower part of the dropping funnel, which can be directly read, which is convenient to use and reduces operating errors. Moreover, the central venous pressure measuring instrument has the advantages of simple structure, low cost and strong universal applicability.

In this embodiment, the filter connector 5 is detachably connected to the dropping funnel 1 . The scale 4 is also detachably connected to the pressure measuring tube 2 . The filter connector 5 specifically adopts a needle filter, that is, a filter is arranged on the needle, and the pressure measuring tube 2 adopts an ordinary infusion tube. When in use, the needle filter connector can be directly inserted into the drip funnel of the infusion tube, so that The bucket is connected to the atmospheric pressure, and the infusion tube at the lower part of the dropping bucket is directly bonded to the scale. The detachable connection can pack the scale 4 and the syringe filter together, and it will be sterilized by epoxide for use. It is not only convenient to pack and carry, but also can be directly used in conjunction with ordinary infusion tubes. , avoiding the use of special tee pipes for connection, saving costs.

In this embodiment, as shown in FIG. 2 , the scale 4 is a hard scale with an arc-shaped cross section. When measuring, the pressure measuring tube 2 can be directly bonded to the arc-shaped hard scale, and the cross section of the scale 4 adopts an arc shape suitable for the pressure measuring tube to make the bonding strength between the two better. Not easy to fall off. Medical personnel can directly use it to measure, not only one person can complete the measurement of central venous pressure, saving manpower, but also reducing errors such as manual stretching and calibration, accurate measurement results, and easy to use.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the purpose and scope of the technical solutions of the utility model shall be covered by the claims of the utility model.

Claims (5)

1. A central venous pressure measuring instrument, characterized in that it includes a dropping funnel (1) and a piezometric tube (2) connected to both ends of the drip funnel (1), and the piezometric tube in the upper section of the dropping funnel (1) A pressure measuring tube opening and closing valve (3) is arranged on the top, a scale (4) is arranged on the pressure measuring tube at the lower part of the dropping funnel, and a filter connector (5) is also arranged on the dropping funnel (1). 2. The central venous pressure measuring instrument according to claim 1, characterized in that: the filter connector (5) and the dripping funnel (1) are detachably connected. 3. The central venous pressure measuring instrument according to claim 2, characterized in that: the scale (4) is detachably connected to the pressure measuring tube (2). 4. The central venous pressure measuring instrument according to claim 3, characterized in that: the scale (4) is a hard scale with a circular arc cross section. 5. The central venous pressure measuring instrument according to claim 4, characterized in that: the filter connector (5) is a needle-type filter connector.

Images