Direct blood vessel pressure measurement system based on ultrasonic transducer

Abstract

The application discloses a direct blood vessel continuous pressure measuring system based on an ultrasonic transducer, which comprises an information collecting module, an information preprocessing module and an information display module, wherein the information collecting module is used for collecting information such as blood flow velocity, pipe diameter and blood density; the information preprocessing module is connected with the information collecting module through Bluetooth, wireless or electricity and is used for preprocessing information such as blood flow velocity, pipe diameter and blood density; and the information display module is connected with the information preprocessing module through electricity; wherein the information collecting module is an ultrasonic micro probe, one end of the ultrasonic micro probe is arranged on a catheter in a trocar, the other end of the catheter is directly contacted with blood in an arterial blood vessel or a venous blood vessel, the catheter is movably sleeved in a sleeve of the trocar, and one end of the catheter is stretched out of the front end of the sleeve. The application has the beneficial effect of accurately monitoring the hemodynamic (arterial / venous blood vessel pressure) change in a continuous and invasive manner.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of biomedical engineering. More particularly, the present application relates to a direct type blood vessel continuous pressure measuring system based on an ultrasonic transducer. BACKGROUND

[0002] Measuring blood pressure is a basic method for understanding health conditions and observing illness, especially during surgery or in an intensive care unit, it is more necessary to continuously monitor the changes of hemodynamics for various critical patients with cardiovascular diseases and the like, and hypertension / hypotension is a direct cause of death for many high-risk patients. Studies have found that there is a significant correlation between blood pressure change rate and mortality rate of cardiovascular diseases. Therefore, by continuously monitoring hemodynamics to grasp the blood pressure change rate and taking corresponding measures, the occurrence of fatal dangerous conditions caused by changes in hemodynamics can be greatly reduced.

[0003] With the development of science and technology, there is currently a relatively accurate monitoring device as shown in Figure 1 As shown in Figure 1 The device includes a pressure sensor 81, a data line 82, a flushing device 83, a flow guide pipe 84, and a trocar 85, and the working principle is as follows: the flushing device 83 is externally connected with heparin-containing normal saline, and is fixedly connected to the pressure sensor 81, the internal catheter of which is in contact with the sensing area inside the pressure sensor 81, and the leading end is connected with the flow guide pipe 84, which is connected to the trocar 85; the pressure sensor 81 is connected with the data line 82, one end of which is provided with a transmission interface to be connected with an external analysis display instrument. When the monitoring starts, the trocar 85 is punctured and placed into the blood vessel, and then the needle core is quickly pulled out while the trocar 85 remains in the blood vessel, and the trocar 85 is airtight connected to the flow guide pipe 84, at the same time, the heparin saline in the flushing device 83 is also guided into the flow guide pipe 84 and meets the flowing blood near the trocar 85, under the action of pressure balance, the meeting point finally remains unchanged. At this time, the pressure of the sensing area on the pressure sensor 81 is consistent with the blood pressure. The pressure measured by the pressure sensor 81 is the pressure of the blood vessel (arterial pressure / venous pressure), which is transmitted to the analysis display instrument through the data line 82 for analysis and display of the results for medical staff to record, guide clinical diagnosis and treatment.

[0004] The disposable pressure sensor can measure the blood pressure of the patient more accurately, but the flow hole in the flow guide tube 84 is too narrow, and blood coagulation is prone to occur when the blood flows back into the tube, which is not conducive to monitoring the blood pressure. When the blood coagulates, the pressure cannot be accurately measured, and heparin saline needs to be flowed into the flow guide tube 84 to maintain the blood near the contact between the trocar 85 and the flow guide tube 84 to prevent blood coagulation, which requires the addition of a flushing device 83 for heparin saline, thereby increasing the cost and being inconvenient to operate. SUMMARY

[0005] In view of the deficiencies in the prior art, the purpose of the present application is to provide a direct type blood vessel continuous pressure measuring system based on an ultrasonic transducer, which is used for arterial pressure measurement and venous pressure measurement, significantly saves materials and reduces costs, generates a Doppler waveform using a Doppler speed calculation formula, and changes the Doppler waveform into a pressure waveform through a specific mathematical model, thereby enabling continuous and accurate monitoring of hemodynamic (arterial / venous vessel pressure) changes.

[0006] In order to achieve these objects and other advantages according to the present application, a direct type blood vessel continuous pressure measuring system based on an ultrasonic transducer is provided, comprising: an information acquisition module for acquiring information such as blood flow velocity, tube diameter, and blood density in a blood vessel;

[0007] an information preprocessing module connected with the information acquisition module by Bluetooth, wireless, or electrical connection, and preprocessing information such as blood flow velocity, tube diameter, and blood density; and

[0008] an information display module connected with the information preprocessing module by electrical connection.

[0009] The information acquisition module is an ultrasonic microprobe, which is arranged at one end of a catheter in a trocar, the other end of the catheter directly contacts blood in an arterial or venous blood vessel, and the catheter is movably sleeved in a sleeve of the trocar, with one end of the catheter extending out of the front end of the sleeve.

[0010] Preferably, the information preprocessing module preprocesses the received information such as blood flow velocity, tube diameter, and blood density, and generates a Doppler waveform using a Doppler speed calculation formula.

[0011] Preferably, the information display module is an analysis display instrument, which changes the Doppler waveform into a pressure waveform through a specific mathematical model.

[0012] Preferably, the catheter is a closed catheter, which is filled with liquid inside.

[0013] Preferably, the radial artery, femoral artery or other artery is selected for monitoring when the ultrasound transducer-based direct blood vessel continuous pressure measurement system is used for arterial pressure measurement, and the subclavian vein, internal jugular vein, femoral vein or other deep vein is selected for monitoring when the ultrasound transducer-based direct blood vessel continuous pressure measurement system is used for venous pressure measurement.

[0014] Preferably, the puncture site of the patient must be sterilized.

[0015] Preferably, the ultrasound microprobe or the catheter needs to be fixed by a fixing device.

[0016] The present application at least has the following advantages: the ultrasound transducer-based direct blood vessel continuous pressure measurement system provided by the present application is used for arterial pressure measurement and venous pressure measurement, which obviously saves materials and reduces costs, generates Doppler waveforms by using a Doppler velocity calculation formula, changes the Doppler waveforms into pressure waveforms through a specific mathematical model, and can accurately monitor the changes of hemodynamics (arterial / venous vessel pressure) in a continuous and invasive manner.

[0017] Other advantages, objects, and features of the present application will be apparent to those skilled in the art from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A schematic diagram of a prior art disposable pressure sensor;

[0019] Figure 2 A structural diagram of the present application;

[0020] Figure 3 A structural diagram of an embodiment of the present application. DETAILED DESCRIPTION

[0021] The present application will be further described below in further detail with reference to the drawings, and the foregoing and other objects, features, aspects and advantages of the present application will become more apparent to those skilled in the art when the description is taken in conjunction with the accompanying drawings. In the drawings, for the purpose of clarity, the shapes and dimensions of the components can be exaggerated, and the same reference numbers can be used throughout the drawings and the following description to refer to same or like parts. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, and the like are based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the dimension from the top to the bottom, "width" corresponds to the dimension from the left to the right, and "depth" corresponds to the dimension from the front to the rear. These relative terms are for illustrative convenience and are not intended to necessarily require a specific orientation. Terms relating to attachment, coupling, and the like (e.g., "connected" and "attached") refer to a relationship in which structures are secured or attached to each other directly or indirectly through intervening structures, as well as movable or rigid attachment or relationship, unless expressly stated otherwise.

[0022] As a specific embodiment of the present application, reference is made to Figures 1 to 3 The present application provides a direct type blood vessel continuous pressure measurement system based on an ultrasonic transducer, comprising: an information acquisition module for acquiring information such as blood flow velocity, pipe diameter size, and blood density in a blood vessel;

[0023] an information preprocessing module connected with the information acquisition module by Bluetooth, wireless, or electricity, and for preprocessing information such as blood flow velocity, pipe diameter size, and blood density; and

[0024] an information display module connected with the information preprocessing module by electricity;

[0025] The information acquisition module is an ultrasonic micro probe 1, which is arranged at one end of a catheter in a trocar, the other end of the catheter directly contacts blood in an arterial or venous blood vessel, and the catheter is movably sleeved in a sleeve of the trocar, with one end of the catheter extending out of the front end of the sleeve.

[0026] Further, the information preprocessing module preprocesses the received information such as blood flow velocity, pipe diameter size, and blood density, and generates a Doppler waveform from a Doppler velocity calculation formula.

[0027] The information display module is an analysis display instrument 3, which changes the Doppler waveform into a pressure waveform through a specific mathematical model.

[0028] The catheter is a closed catheter, with its inside filled with liquid.

[0029] Further, the direct type blood vessel continuous pressure measuring system based on ultrasonic transducer selects radial artery, femoral artery or other artery for arterial pressure measurement, and selects subclavian vein, internal jugular vein, femoral vein or other deep vein for venous pressure measurement.

[0030] The puncture site of the patient must be sterilized. The ultrasonic microprobe 1 or the catheter is fixed by a fixing device.

[0031] As a specific embodiment of the present application, referring to Figure 3 , first, the detected site of the patient is sterilized, after sterilization, the trocar is inserted into the artery or vein at an acute angle with the skin and parallel to the running direction of the artery or vein, after puncture, one end of the trocar is sent into the artery or vein and pushed to the required depth, the needle core is pulled out, the catheter is quickly inserted into the trocar until one end of the catheter extends into the blood vessel and contacts with the blood, the other end of the catheter is provided with the ultrasonic microprobe 1, and the ultrasonic microprobe 1 is connected with the information acquisition module 2 by Bluetooth, wireless or electrical connection.

[0032] The one end of the catheter directly contacts with the blood, the information of arterial or venous blood flow velocity, pipe diameter and blood density is transmitted to the ultrasonic microprobe 1 through the internal liquid, the ultrasonic microprobe 1 transmits the information of arterial or venous blood flow velocity, pipe diameter and blood density to the information acquisition module 2, the information acquisition module 2 generates Doppler waveform from the information of arterial or venous blood flow velocity, pipe diameter and blood density by using Doppler velocity calculation formula and compensation formula, the information acquisition module 2 transmits the Doppler waveform to the analysis display instrument 3, the analysis display instrument 3 changes the Doppler waveform into arterial or venous pressure waveform by a specific mathematical model, and the medical staff can clearly observe the arterial or venous pressure information of the patient.

[0033] The number of devices and the scale of processes described here are used to simplify the description of the present application. The application, modification and change of the present application are obvious to those skilled in the art.

[0034] Although the embodiments of the present application have been disclosed as above, it is not limited to the application and embodiment listed in the specification. It can be fully applied to various fields suitable for the present application. Additional modifications can be easily realized by those skilled in the art. Therefore, the present application is not limited to specific details and figures shown and described herein without departing from the general concept defined by the claims and equivalent scope.

Claims

1. A direct continuous vascular pressure measurement system based on an ultrasound transducer, characterized in that, include: The information acquisition module is used to collect information on blood flow velocity, vessel diameter, and blood density within blood vessels. An information preprocessing module, which is connected to the information acquisition module via Bluetooth, wirelessly, or electrically, preprocesses information on blood flow velocity, tube diameter, and blood density; and An information display module is electrically connected to the information preprocessing module; The information acquisition module is an ultrasonic microprobe, which is located at one end of a catheter inside a cannula. The other end of the catheter is in direct contact with the blood in an artery or vein. The catheter is movably sleeved inside the cannula of the cannula, with one end of the catheter extending beyond the tip of the cannula. The cannula is inserted at an acute angle to the skin, parallel to the course of the artery or vein. After puncture, the distal end of the cannula is pushed into the artery or vein to the required depth. The needle core is removed, and the catheter is quickly inserted into the cannula until one end of the catheter extends into the blood vessel and comes into contact with the blood. The other end of the catheter is equipped with the ultrasonic microprobe and extends beyond the proximal end of the cannula. The information preprocessing module preprocesses the received blood flow velocity, tube diameter, and blood density information, and generates Doppler waveforms using the Doppler velocity calculation formula. The information display module is an analysis display instrument, which transforms the Doppler waveform into a pressure waveform through a specific mathematical model. The catheter is a closed catheter filled with liquid; When performing arterial pressure measurement, the direct vascular continuous pressure measurement system based on an ultrasound transducer selects the radial artery, femoral artery, or other arteries for monitoring. When performing venous pressure measurement, the direct vascular continuous pressure measurement system based on an ultrasound transducer selects the subclavian vein, internal jugular vein, femoral vein, or other deep veins for monitoring.

2. The direct continuous vascular pressure measurement system based on an ultrasound transducer as described in claim 1, characterized in that, The puncture site of the patient must be sterilized.

3. The direct continuous vascular pressure measurement system based on an ultrasound transducer as described in claim 1, characterized in that, The ultrasonic microprobe or the catheter needs to be fixed in place using a fixing device.

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