WO2020199309A1

WO2020199309A1 - Novel invasive blood pressure sensor

Info

Publication number: WO2020199309A1
Application number: PCT/CN2019/086611
Authority: WO
Inventors: 刘广志
Original assignee: 苏州润迈德医疗科技有限公司
Priority date: 2019-03-29
Filing date: 2019-05-13
Publication date: 2020-10-08
Also published as: CN109833038A

Abstract

An invasive blood pressure sensor, comprising a pressure sensing chip (1), and further comprising a peristaltic pump head (2); the peristaltic pump head (2) comprises a rotating wheel (21), the rotating wheel (21) is provided thereon with a connection structure connected to a rotating shaft of an external motor (8), and the peristaltic pump head (2) is internally equipped with a flexible tube (3); an end of the flexible tube (3) is connected to the pressure sensing chip (1), and the other end thereof is connected to a saline bag by means of an infusion tube. The peristaltic pump head (2) is integrated in the blood pressure sensor; the flexible tube (3) is pre-installed in the peristaltic pump head (2), and the flexible tube (3) only needs to be connected to the infusion tube connected to the saline bag, which eliminates the operation of installing the flexible tube (3) in a peristaltic pump when replacing the sensor, and which may further simplify the operation process of replacing the sensor such that the operation of installing the sensor is easier. In addition, the installation effect of pre-installing the flexible tube (3) in the peristaltic pump head (2) is also better than that of on-site installation during use, which can prevent the problem of improper on-site installation.

Description

A new type of invasive blood pressure sensor

Technical field

The present invention relates to the technical field of medical diagnostic equipment, in particular to a sensor for acquiring invasive aortic pressure.

Background technique

Invasive blood pressure (IBP) can generally be monitored: arterial blood pressure (ABP), central venous pressure (CVP), pulmonary artery pressure (PAP), left atrial pressure (LAP), intracranial pressure (ICP). The measurement principle is: First, the catheter is punctured and placed in the blood vessel of the tested part. The outer end of the catheter is directly connected to the pressure sensor. Because the fluid has the pressure transmission function, the pressure in the blood vessel will be transmitted to the liquid through the catheter. On the external pressure sensor, the dynamic waveform of the real-time pressure change in the blood vessel can be obtained. Through a specific calculation method, the systolic blood pressure, diastolic blood pressure and average arterial pressure of the blood vessel can be obtained.

Invasive blood pressure sensors are disposable. Each time a new sensor is installed, the air in the sensor and the pressure tube must be manually drained. The height change of the sensor will affect the pressure measurement. The preparation of each operation brings a lot of trouble to the surgeon and nurses, so the market urgently needs a device that can work independently, automatically exhaust and automatically zero to obtain invasive pressure. The invention patent with application number 201811093192X "A device for obtaining aortic pressure when measuring blood flow reserve fraction" proposes a device that uses a peristaltic pump to squeeze by adding a peristaltic pump between the blood pressure sensor and the saline bag The infusion tube realizes the function of automatic exhaust. However, since the blood pressure sensor is a disposable appliance, the peristaltic pump needs to be reinstalled every time the blood pressure sensor is replaced, and the infusion tube needs to be passed through the peristaltic pump again, so the operation is not simple enough. Moreover, in this patent application, the blood pressure collection terminal does not have a built-in display module, and it needs to be connected to the pressure display terminal through an expansion port to display the measured pressure value, which is cumbersome in actual use.

In addition, when measuring aortic pressure, when the baroreceptor chip in the pressure sensor is at the same level as the heart, the aortic pressure can be accurately measured. The prior art does not provide relevant auxiliary functions to realize the positioning of the pressure sensor chip, and manual positioning alone is time-consuming and labor-intensive.

Summary of the invention

The technical problem to be solved by the present invention is to provide an invasive blood pressure sensor with simple operation.

In order to solve the above technical problems, the present invention is achieved through the following technical solutions: a new type of invasive blood pressure sensor, including a baroreceptor chip, also includes a peristaltic pump head, the peristaltic pump head includes a rotating wheel, the rotating wheel is provided with an external motor In the connection structure of the rotating shaft, the peristaltic pump head is equipped with a hose, one end of the hose is connected with the pressure sensor chip, and the other end is connected with the saline bag through the infusion tube.

Further, the connecting end of the hose and the infusion tube is provided with a luer connector and is connected with the infusion tube.

Further, the connecting structure on the rotating wheel is a square hole on the wheel shaft, and the rotating shaft of the external motor is a square shaft.

Further, a one-way valve is connected between the hose and the pressure sensing chip, and the allowed flow direction of the one-way valve is from the saline bag to the pressure sensing chip.

Further, it also includes a laser transmitter, and the laser transmitter and the pressure sensor chip are at the same level.

Further, a display screen is also included, and the display screen includes a digital display area and a waveform display area.

The advantage of the present invention is that the peristaltic pump head is integrated in the blood pressure sensor, and the hose is pre-installed in the peristaltic pump head, and only the hose is connected to the infusion tube connected to the saline bag, which saves the need to replace the sensor The operation of installing the hose in the peristaltic pump at the time can further simplify the operation process of replacing the sensor and make the operation of installing the sensor easier. In addition, the installation effect of the hose pre-installed in the peristaltic pump head is also better than on-site installation during use, which can avoid the problem of improper on-site installation.

Description of the drawings

Figure 1 is a schematic structural diagram of an embodiment of the present invention;

Figure 2 is a schematic diagram of the connection between a peristaltic pump head and an external motor in an embodiment of the present invention.

detailed description

The present invention will be described in detail below in conjunction with the drawings and specific embodiments:

An embodiment of the present invention is shown in Figures 1 and 2. A new type of invasive blood pressure sensor includes a baroreceptor chip 1, and also includes a peristaltic pump head 2. The peristaltic pump head 2 includes a rotating wheel 21, and the rotating wheel 21 is provided with The connecting structure of the external motor 8 rotating shaft connection, the peristaltic pump head 2 is built with a hose 3, one end of the hose 3 is connected to the pressure sensor chip 1, and the other end is connected to the saline bag through an infusion tube.

One end of the blood pressure sensor is connected to the saline bag, and the other end is connected to the patient’s aorta through an external device. The purpose of the blood pressure sensor is to connect to the patient’s aorta. The middle is filled with saline to form a pathway with the aorta. There is a baroreceptor chip inside the sensor. The dynamic pressure of the aorta can be converted into an analog signal, and the collected analog signal can be converted into a digital model through the internal circuit of the blood pressure sensor to obtain the systolic, diastolic, and average aortic pressure.

When in use, connect the hose 3 to the infusion tube, the rotating wheel 21 of the peristaltic pump head 2 is connected to the external motor 8, and the external motor 8 drives the peristaltic pump head 2 to rotate so as to squeeze the hose 3 to make the liquid flow in the hose 3. The automatic exhausting saves the operation of installing the hose 3 in the peristaltic pump when replacing the sensor, and can further simplify the operation process of replacing the sensor. In addition, the installation effect of the hose 3 pre-installed in the peristaltic pump head 2 is also better than on-site installation during use, which can avoid the problem of improper on-site installation.

In this embodiment, the connecting end of the hose 3 and the infusion tube is provided with a luer connector 4 and is connected with the infusion tube.

In this embodiment, the connecting structure on the rotating wheel 21 of the peristaltic pump head 2 is a square hole on the wheel shaft, and the rotating shaft of the external motor 8 is a square shaft. It can be inserted through the square shaft and the square hole, the connection structure is simple, and the use is convenient.

In this embodiment, a one-way valve 7 is connected between the hose 3 and the pressure-sensitive chip 1, and the allowed flow direction of the one-way valve 7 is from the saline bag to the pressure-sensitive chip 1.

In this embodiment, the blood pressure sensor further includes a laser transmitter 5, and the laser transmitter 5 and the baroreceptor chip 1 are at the same level. The laser transmitter 5 can emit a horizontal beam to irradiate the heart of the patient to ensure that the height of the laser transmitter 5 is at the same level as the heart. The beam plays a role in assisting the alignment, making the alignment easier. The barorecepting chip 1 is designed to be at the same level as the laser transmitter 5, so as to ensure that the barorecepting chip 1 is at the same level as the heart and can accurately measure the aortic pressure.

In this embodiment, the blood pressure sensor further includes a display screen, which includes a digital display area and a waveform display area. Calculate the systolic pressure, diastolic pressure and average pressure from the signal of the pressure sensor, and display them on a liquid crystal screen while displaying the waveform curve. There is no need to connect an external display terminal, which is more intuitive and convenient to use and simple to operate.

It should be emphasized that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are all It still falls within the scope of the technical solution of the present invention.

Claims

A new type of invasive blood pressure sensor, including a baroreceptor chip, is characterized in that it also includes a peristaltic pump head, the peristaltic pump head includes a rotating wheel, and the rotating wheel is provided with a connection structure connected to a rotating shaft of an external motor, so The peristaltic pump head has a built-in hose, one end of the hose is connected with the pressure sensing chip, and the other end is connected with the saline bag through an infusion tube.
The new type of invasive blood pressure sensor according to claim 1, wherein the connecting end of the hose and the infusion tube is provided with a luer connector and is connected to the infusion tube.
The new type of invasive blood pressure sensor according to claim 1, wherein the connecting structure on the rotating wheel is a square hole on the wheel shaft, and the rotating shaft of the external motor is a square shaft.
The new type of invasive blood pressure sensor according to claim 1, wherein a one-way valve is connected between the hose and the baroreceptive chip, and the allowed flow direction of the one-way valve is from the saline bag to the baroreceptive chip.
The new type of invasive blood pressure sensor according to claim 1, characterized in that it further comprises a laser transmitter, and the laser transmitter and the baroreceptor chip are at the same level.
The new type of invasive blood pressure sensor according to claim 1, characterized in that it further comprises a display screen, and the display screen includes a digital display area and a waveform display area.