A system and method for continuous arterial wall blood pressure and peripheral perfusion pressure measurement

Abstract

This invention relates to the field of medical technology, specifically to a system and method for continuous measurement of arterial wall blood pressure and peripheral perfusion pressure. The system includes a data acquisition device, an angle detection device, a width adjustment device, and a data processing device. In this system, the two puncture needles of the acquisition device are positioned across both sides of the patient's artery. In actual operation, the two puncture needles cross the two sides of the artery. The expansion and contraction of the artery cause displacement of the tissues on both sides, resulting in an angle shift at the other end of the puncture needles. This displacement allows for the processing and acquisition of the patient's perfusion pressure data, providing a simple and effective way to monitor the magnitude of arterial perfusion pressure.

Description

Technical Field

[0001] This invention relates to the field of medical technology, specifically to a system and method for measuring continuous blood pressure and peripheral perfusion pressure on the outer wall of arteries. Background Technology

[0002] Currently in clinical practice, there is a lack of simple and effective methods for monitoring the effective perfusion pressure in arteries, or the magnitude of local perfusion pressure. It is usually estimated and judged by medical staff based on the patient's blood pressure data.

[0003] Meanwhile, in medical centers such as operating rooms and intensive care units, the invasive arterial puncture catheter method is commonly used to continuously measure patients' blood pressure. This involves puncturing a peripheral artery and connecting an indwelling catheter to a pressure monitor via a pressure sensor tubing to monitor arterial pressure and waveform. However, invasive blood pressure measurement can cause injury to the body, and the test site is prone to bleeding or infection. The procedure is also complex and has a certain failure rate. Furthermore, when continuous real-time arterial blood pressure is urgently needed to guide treatment in clinical emergency situations, it cannot provide timely and effective real-time arterial pressure data.

[0004] Although there are currently methods for continuous, non-invasive arterial pressure measurement, they still have many shortcomings.

[0005] For example, flattening tension measurement methods require contact with the skin over the artery and the application of a certain continuous pressure. The arterial pressure is then displayed on a monitor through signal amplification, filtering, and conversion. This method requires accurate alignment and external fixation of the pressure detection site, which is prone to displacement during limb movement, causing signal inaccuracy or loss. Furthermore, it requires that there be no thick tissue or fat above the superficial artery. Simultaneously, because a certain pressure needs to be applied, it may easily cause compression ischemia or even distal tissue ischemia and necrosis.

[0006] Another method is blood pressure measurement based on photoplethysmography (PPG). PPG signals are weak physiological signals, and due to dynamic changes in the human body, the measured signal is significantly affected by noise. Furthermore, because of differences in arterial elasticity and blood content in capillaries at the fingertips, the shape of the measured pulse wave signal varies greatly, making it an indirect method of arterial pressure measurement. In clinical practice, this method is prone to signal loss or inaccuracies in patients with poor microcirculation, such as those in shock, heart failure, anemia, or hypothermia. Summary of the Invention

[0007] The purpose of this invention is to solve the problem mentioned in the background above, which is that there is currently a lack of simple and effective methods for monitoring the magnitude of intra-arterial perfusion pressure.

[0008] To achieve the above objectives, the present invention provides a continuous arterial wall blood pressure and peripheral perfusion pressure measurement system, comprising:

[0009] The collection device includes two puncture needles, one end of which is used to pierce the patient's skin and crosses across both sides of the patient's artery.

[0010] An angle detection device includes a fulcrum and an angle measurement module; the two puncture needles are respectively connected to the two angle detection devices, the other end of the puncture needle is hinged to the fulcrum, and the angle measurement module is used to measure the angle offset data of the other end of the puncture needle;

[0011] A width adjustment device is provided, wherein the two angle detection devices are connected through the width adjustment device, and the width adjustment device is used to adjust the distance between the two support points.

[0012] A data processing device is used to process the angle offset data transmitted by the angle measurement module to obtain the patient's perfusion pressure data.

[0013] Understandably, in actual operation, the puncture needle is inserted into both sides of the artery. When the artery expands and contracts, it causes the tissues on both sides to shift. The tissue displacement causes the angle of the other end of the puncture needle to shift, thereby processing and obtaining the patient's perfusion pressure data. This simple and effective method enables the monitoring of the perfusion pressure in the patient's artery.

[0014] Furthermore, each of the two puncture needles is equipped with a pressure measurement module at the end where it is inserted into the patient's skin, and the pressure measurement module is electrically connected to the data processing module.

[0015] The pressure measurement module is used to measure the pressure on the end of the puncture needle that is inserted into the patient's skin. The data processing device is also used to process the pressure data transmitted by the pressure measurement module to obtain the patient's blood pressure data.

[0016] Understandably, this system can also directly measure the pressure on both sides of the patient's artery through the pressure measurement module, thereby calculating the patient's blood pressure. This method avoids the risks associated with traditional blood pressure measurements, which require puncturing the arterial wall, potentially causing thrombosis or even ischemia and necrosis of distal tissues. Furthermore, it eliminates the need to apply pressure to the arterial surface, thus avoiding the risk of compression and ischemia, or even distal tissue ischemia and necrosis, in the distal artery.

[0017] Furthermore, the system also includes a display device electrically connected to the data processing device, which is used to display the perfusion pressure data and blood pressure data.

[0018] Understandably, the display device can show the perfusion pressure and blood pressure data processed by the data processing device, making it easier for medical staff to understand the patient's blood pressure and perfusion pressure.

[0019] Furthermore, the width adjustment device includes a threaded post and an adjustment knob. The threaded post is used to connect the two angle detection devices, and the adjustment knob is used to rotate and adjust the distance between the two angle detection devices.

[0020] Understandably, the use of threads to achieve length variation facilitates fine-tuning of the distance between the two angle detection devices, thereby enabling the device to make subtle adjustments based on the thickness of the patient's artery.

[0021] On the other hand, the present invention proposes a method for measuring continuous blood pressure and peripheral perfusion pressure on the outer wall of arteries, comprising the following steps:

[0022] Real-time acquisition of displacement data of tissues on both sides of the patient's artery;

[0023] The patient's perfusion pressure data is obtained based on the displacement data.

[0024] It is understandable that when an artery dilates, the tissues on both sides of the artery also dilate, resulting in increased local perfusion pressure (i.e., increased flow rate). When an artery constricts, the tissues on both sides of the artery also constrict, resulting in decreased local perfusion pressure (i.e., decreased flow rate). Therefore, local perfusion pressure is positively correlated with the degree of arterial dilation and also with the tissues on both sides of the artery. Thus, this method can simply and effectively obtain the patient's perfusion pressure data by utilizing the displacement data of the tissues on both sides of the patient's artery.

[0025] Furthermore, in the step of real-time acquisition of displacement data of tissues on both sides of the patient's artery,

[0026] Two puncture needles are inserted into the patient's skin and placed across the patient's artery on both sides. The displacement data of the tissues on both sides of the patient's artery is replaced by the angular offset data of the other end of the puncture needles.

[0027] It is understandable that the angle offset data at the other end of the puncture needle is positively correlated with the displacement data of the tissues on both sides of the patient's artery. Using the angle offset data at the other end of the puncture needle to replace the displacement data of the tissues on both sides of the patient's artery makes it easier to obtain the perfusion pressure data.

[0028] Furthermore, by inserting a puncture needle into a pressure measurement module on one end of the patient's skin, pressure data of the tissues on both sides of the patient's artery are measured, and the patient's blood pressure data is obtained based on the pressure data.

[0029] Understandably, arterial pulsation transmits pressure directly to surrounding tissues. Pressure measurement modules near the arteries receive the pressure signals, allowing the system to derive the patient's blood pressure data from the pressure readings.

[0030] In summary, this invention provides a system and method for continuous measurement of arterial wall blood pressure and peripheral perfusion pressure, which has at least the following advantages:

[0031] 1. Different needle spacings are suitable for patients of different ages. This invention uses two puncture needles with a certain distance between them, which can simultaneously collect pressure signals from both sides of the artery, resulting in higher signal acquisition capability and sensitivity. Furthermore, it is equipped with a width adjustment device, allowing the distance between the two puncture needles to be adjusted according to different patient locations, arterial diameters, or patient ages.

[0032] 2. Because the puncture needle is outside the artery, this invention avoids the risk of arterial wall puncture, thrombosis, or even ischemia and necrosis of distal tissues and limbs. At the same time, it also avoids the risk of compressing ischemia or even distal tissue ischemia and necrosis by applying pressure to the arterial surface.

[0033] 3. The signal is accurate and sensitive. The pressure measurement scheme adopted in this invention directly measures the pressure around the artery, directly receiving the physical pressure signal without going through complex calculation methods such as photoplethysmography (PPG). The signal is direct and accurate. Furthermore, it is not affected by various poor microcirculatory states such as shock, heart failure, anemia, and hypothermia. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the continuous arterial wall blood pressure and peripheral perfusion pressure measurement system disclosed in the embodiment;

[0036] Figure 2 This is a schematic diagram illustrating the change in the angle of the puncture needle during arterial dilation, as disclosed in the embodiment.

[0037] Figure 3 This is a schematic diagram of the width adjustment device disclosed in the embodiment;

[0038] Figure 4 This is a schematic flowchart of the method for measuring continuous blood pressure and peripheral perfusion pressure on the outer wall of an artery as disclosed in the embodiment.

[0039] 1-Puncture needle, 2-Angle detection device, 3-Width adjustment device, 4-Data processing device, 5-Display device;

[0040] 11-Pressure measurement module, 21-Lever point, 31-Threaded rod, 32-Adjustment knob, 33-Scale plate. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0042] Please see Figure 1 and Figure 2 :

[0043] On one hand, this invention proposes a continuous arterial wall blood pressure and peripheral perfusion pressure measurement system, comprising:

[0044] The collection device includes two puncture needles 1, one end of which is used to pierce the patient's skin and crosses across both sides of the patient's artery.

[0045] An angle detection device 2 includes a housing, inside which a fulcrum 21 and an angle measuring module are fixedly installed; two puncture needles 1 are respectively connected to two angle detection devices, and the other end of the puncture needle 1 is hinged to the fulcrum 21; the angle measuring module is used to measure the angle offset data of the other end of the puncture needle.

[0046] Width adjustment device 3, the two angle detection devices 2 are connected through the width adjustment device 3, and the width adjustment device 3 is used to adjust the distance between the two support points 21.

[0047] The data processing device 4 is used to process the angle offset data transmitted by the angle measurement module to obtain the patient's perfusion pressure data.

[0048] In this embodiment, the two puncture needles 1 can be ordinary metal puncture needles, and preferably a solid design; the angle measurement module can be an existing high-precision tilt sensor or angle sensor, that is, by detecting the angle between the other end of the puncture needle 1 and the vertical direction or a certain specified direction, the angle offset data of the other end of the puncture needle 1 during arterial pulsation is obtained. At the same time, the angle measurement module can send the obtained angle offset data to the data processing device 4. Of course, the angle measurement module can also directly send the measured angle to the data processing device 4.

[0049] The width adjustment device 3 may include a threaded post 31 and an adjustment knob 32. The housings of the two angle detection devices 2 are respectively provided with connecting holes. The threaded post 31, with its connecting tube passing through the two connecting holes, is positioned on one side of one of the connecting holes. The wall of the connecting hole away from the adjustment knob 32 is provided with threads that match those of the threaded post 31. That is, when the adjustment knob 32 is rotated, the two housings move closer to or further apart. Preferably, the thread density of the threaded post 31 satisfies the requirement that when the adjustment knob 32 rotates 360 degrees, the distance between the two housings changes by 1 millimeter.

[0050] It is also understood that the width adjustment device 3 is used to adjust the relative distance between the two puncture needles 1, so that the two puncture needles 1 can cross across both sides of the patient's artery. That is, the width adjustment device 3 does not necessarily need to be able to adjust the distance between the two housings. It can also only adjust the distance between the two fulcrums 21 that are hinged to the puncture needles 1, while the distance between the two angle detection devices 2 remains unchanged.

[0051] Furthermore, the width measuring device 3 in this embodiment may also include a scale plate 33, which is installed above the threaded post 31. When the distance between the two housings decreases, one end of the scale plate 33 will gradually be retracted into the interior of one of the housings, thereby realizing the scale display of the scale plate 33, which changes with the distance between the two housings, thereby displaying the distance between the two fulcrums 21.

[0052] In this embodiment, the data processing device 4 can be an existing microprocessor, smart chip, or computer, that is, capable of processing the data transmitted by the angle measurement module to obtain the patient's perfusion pressure data.

[0053] In a more complete embodiment, each of the two puncture needles 1 is equipped with a pressure measurement module 11 at the end for piercing the patient's skin, and the pressure measurement module 11 is electrically connected to the data processing module.

[0054] The pressure measurement module 11 may include a piezoelectric film disposed at one end of the puncture needle 1. The pressure on the end of the puncture needle 1 inserted into the patient's skin is detected by the electrical signal generated by the piezoelectric film when it is squeezed. The data processing device 4 is also used to process the received electrical signal to obtain the patient's blood pressure data.

[0055] To help medical staff better understand the patient's blood pressure and perfusion pressure, this system also includes a display device 5, which can be a monitor, LED screen, or LED display tube. The display device 5 is electrically connected to the data processing device 4 and is used to display the perfusion pressure data and blood pressure data.

[0056] On the other hand, the present invention also proposes a method for measuring continuous blood pressure and peripheral perfusion pressure on the outer wall of arteries, comprising the following steps:

[0057] S10, real-time acquisition of displacement data of tissues on both sides of the patient's artery;

[0058] S20, obtain the patient's perfusion pressure data based on the displacement data.

[0059] This method utilizes the principle that local perfusion pressure is positively correlated with the degree of arterial dilation and also positively correlated with the tissues on both sides of the artery. Furthermore, it obtains the patient's perfusion pressure data by detecting the movement of the tissues on both sides of the artery.

[0060] Furthermore, in step S10, two puncture needles can be inserted into the patient's skin and placed across both sides of the patient's artery, respectively. The displacement data of the tissues on both sides of the patient's artery can be replaced by the angular offset data of the other end of the puncture needles.

[0061] This method utilizes the positive correlation between the angle offset data of the other end of the puncture needle and the displacement data of the tissues on both sides of the patient's artery. By using the angle offset data of the other end of the puncture needle to replace the displacement data of the tissues on both sides of the patient's artery, it is easier to obtain the perfusion pressure data.

[0062] Furthermore, by inserting a puncture needle into a pressure measurement module on one end of the patient's skin, pressure data of the tissues on both sides of the patient's artery are measured, and the patient's blood pressure data is obtained based on the pressure data.

[0063] Understandably, arterial pulsation transmits pressure directly to surrounding tissues. Pressure measurement modules near the arteries receive the pressure signals, allowing the system to derive the patient's blood pressure data from the pressure readings.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A continuous arterial wall blood pressure and peripheral perfusion pressure measurement system, characterized in that, include: The collection device includes two puncture needles, one end of which is used to pierce the patient's skin and crosses across both sides of the patient's artery. An angle detection device includes a fulcrum and an angle measurement module; the two puncture needles are respectively connected to the two angle detection devices, the other end of the puncture needle is hinged to the fulcrum, and the angle measurement module is used to measure the angle offset data of the other end of the puncture needle; A width adjustment device is provided, wherein the two angle detection devices are connected through the width adjustment device, and the width adjustment device is used to adjust the distance between the two fulcrums. The width adjustment device includes a threaded column and an adjustment knob. The threaded column is used to connect the two angle detection devices, and the adjustment knob is used to rotate and adjust the distance between the two angle detection devices. A data processing device is used to process the angle offset data transmitted by the angle measurement module to obtain the patient's perfusion pressure data.

2. The continuous arterial wall blood pressure and peripheral perfusion pressure measurement system according to claim 1, characterized in that, Both puncture needles are equipped with a pressure measurement module at the end where they are inserted into the patient's skin, and the pressure measurement module is electrically connected to the data processing module. The pressure measurement module is used to measure the pressure on the end of the puncture needle that is inserted into the patient's skin. The data processing device is also used to process the pressure data transmitted by the pressure measurement module to obtain the patient's blood pressure data.

3. The continuous arterial wall blood pressure and peripheral perfusion pressure measurement system according to claim 2, characterized in that, It also includes a display device, which is electrically connected to the data processing device, and is used to display the perfusion pressure data and blood pressure data.

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