Intravascular blood pH value real-time monitoring device suitable for peripheral indwelling needle

Abstract

The invention discloses an intravascular blood pH value real-time monitoring device suitable for a peripheral indwelling needle. The intravascular blood pH value real-time monitoring device comprises an indwelling needle body, a miniature pH detection unit, a shell and an electrode wire, the miniature pH detection unit comprises a fixing sleeve, a first external terminal and a miniature pH composite electrode; the fixing sleeve is arranged at one end of the remaining needle body; the micro pH composite electrode is embedded in the outer side wall of the fixing sleeve; the first external terminal is arranged on one side, close to the remaining needle body, of the micro pH composite electrode; a signal processing module is arranged in an inner cavity of the shell; a display screen and a connecting piece are arranged on the outer side wall of the shell; the electrode wire is arranged in the indwelling needle body and used for being connected with the micro pH composite electrode and the signal processing module. Through cooperation of the micro pH detection unit, the signal processing module, the electrode wire and other parts, the blood pH value of a patient can be monitored in real time without repeatedly extracting a blood gas sample, and the monitoring process is greatly simplified.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a device for real-time monitoring of intravascular blood pH value suitable for peripheral indwelling needles. Background Technology

[0002] Peripherally inserted needles (PEKs), as a mature vascular access tool, are widely used in routine clinical infusions and drug therapy due to their advantages such as ease of operation, long indwelling time, and minimal trauma to patients. However, existing PNKs have limited functionality, only enabling basic fluid delivery and failing to provide continuous, non-invasive monitoring of important physiological indicators in patients. This, to some extent, limits their application value in dynamic monitoring scenarios.

[0003] In clinical practice, blood pH is a core parameter for assessing a patient's acid-base balance. Abnormal changes in blood pH are closely related to various critical illnesses such as respiratory failure, circulatory dysfunction, and metabolic disorders. Timely and accurate monitoring of dynamic changes in a patient's blood pH is crucial for early diagnosis, timely adjustment of treatment plans, and prognostic assessment. Currently, clinical practice mainly relies on traditional arterial puncture for blood sampling or the use of disposable blood gas needles to draw blood samples, followed by ex vivo analysis using an external blood gas analyzer. This method has the following significant drawbacks: First, the procedure is cumbersome, requiring professional medical personnel to perform the puncture and blood collection, which is time-consuming and cannot meet the needs for rapid and continuous monitoring. Second, as an invasive procedure, repeated punctures increase patient discomfort and may lead to complications such as bleeding, hematoma, and infection at the puncture site. Third, this method can only provide discrete data at the time of blood collection and cannot achieve continuous, real-time monitoring of blood pH. Therefore, it is difficult to capture rapid changes in the early stages of the disease, and it cannot meet the urgent need for accurate and dynamic monitoring of the patient's acid-base balance in scenarios such as intensive care and postoperative monitoring. For example, during surgery, surgical procedures and anesthesia can disrupt the stability of the patient's internal environment, causing dynamic fluctuations in pH. It is necessary to continuously track the patient's acid-base status to assist in clinical decision-making.

[0004] While some standalone pH monitoring devices are available on the market, these devices are typically designed as independent units and cannot be effectively integrated with conventional peripheral intravenous catheters. Their use often requires additional, specialized vascular puncture, increasing operational complexity and patient discomfort. Furthermore, these devices generally suffer from large size, cumbersome operation procedures, susceptibility to interference, and unstable fixation on the body surface. Therefore, they are ill-suited for the practical clinical scenario of concurrent peripheral intravenous infusion and monitoring.

[0005] Therefore, how to provide a real-time intravascular blood pH monitoring device suitable for peripheral indwelling needles that can be deeply integrated with conventional peripheral indwelling needles and can monitor the patient's blood pH value in real time without repeated blood sampling is one of the technical problems that urgently need to be solved in this field. Summary of the Invention

[0006] In view of this, the present invention provides a real-time monitoring device for intravascular blood pH value suitable for peripheral indwelling needles, the purpose of which is to solve the problems existing in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A device for real-time monitoring of intravascular blood pH value suitable for peripheral indwelling needles, comprising: an indwelling needle body; A miniature pH detection unit; the miniature pH detection unit includes a fixing sleeve, a first external terminal, and a miniature pH composite electrode for detecting blood pH value; the fixing sleeve is disposed at one end of the indwelling needle body; the miniature pH composite electrode is embedded in the outer wall of the fixing sleeve; the first external terminal is disposed on the side of the miniature pH composite electrode close to the indwelling needle body; The housing includes an inner cavity containing a signal processing module for processing electrical signals collected by the micro pH detection unit within the housing; a second external terminal is located on one side of the housing; a display screen and a connector for detachably connecting to the indwelling needle body are located on the outer side wall of the housing; both the display screen and the second external terminal are connected to the signal processing module. Electrode wire; the electrode wire is disposed inside the indwelling needle body; one end of the electrode wire is provided with a first interface that matches the first external terminal, and the other end of the electrode wire is provided with a second interface that matches the second external terminal.

[0008] Preferably, the indwelling needle body includes an indwelling needle seat and an indwelling catheter; the indwelling needle seat has a cavity inside; an isolation plug is provided in the cavity; the indwelling catheter is disposed at one end of the indwelling needle seat; the fixing sleeve is disposed at the end of the indwelling catheter away from the indwelling needle seat; the indwelling catheter has a puncture chamber communicating with the cavity inside; a puncture needle is provided in the puncture chamber; the puncture needle penetrates the isolation plug.

[0009] Preferably, the end of the puncture needle away from the indwelling catheter is provided with a puncture needle seat that matches the indwelling needle seat; a needle holder is provided on the outer side wall of the puncture needle seat.

[0010] Preferably, the miniature pH composite electrode includes a reference electrode, a glass electrode, and a temperature compensation electrode; the reference electrode is used to provide a stable potential reference; the glass electrode is used to sense the hydrogen ion concentration in the blood; and the temperature compensation electrode is used to collect blood temperature in real time to achieve temperature calibration of pH monitoring data and eliminate the influence of temperature on detection accuracy.

[0011] Preferably, the signal processing module includes a circuit board; the circuit board integrates a signal amplification circuit, an analog-to-digital converter circuit, and a microprocessor; the signal amplification circuit is connected to the second external terminal; the signal amplification circuit is used to amplify electrical signals; the analog-to-digital converter circuit is connected to the signal amplification circuit; the analog-to-digital converter circuit is used to convert electrical signals into digital signals; the display screen is connected to the microprocessor; the microprocessor is used to process the digital signals and transmit the obtained pH value data to the display screen.

[0012] Preferably, a battery is provided inside the housing; the battery is connected to the signal processing module.

[0013] Preferably, a charging interface is provided on the outer side wall of the housing; the charging interface is connected to the battery.

[0014] Preferably, the outer casing is provided with a power indicator light to remind the user of the battery's power level.

[0015] Preferably, the circuit board also integrates a wireless transmission unit; the wireless transmission unit is used to synchronously transmit the detection data to an external terminal monitoring device.

[0016] Compared with the prior art, the present invention has achieved the following technical effects: by combining components such as a miniature pH detection unit, a signal processing module, and electrode wires, the present invention can monitor the pH value of a patient's blood in real time without repeatedly drawing blood gas samples, which greatly simplifies the monitoring process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a real-time intravascular blood pH monitoring device suitable for peripheral indwelling needles before use according to the present invention. Figure 2 This is a schematic diagram of the pH monitoring process of an intravascular blood pH monitoring device suitable for peripheral indwelling needles according to the present invention. Figure 3 for Figure 2 A magnified view of part A in the middle; Figure 4 for Figure 2 A magnified view of part B in the middle section; Figure 5 This is a schematic diagram of the internal structure of the outer shell; In the diagram: 1. Indwelling needle body; 101. Indwelling needle seat; 102. Indwelling catheter; 2. Miniature pH detection unit; 201. Fixing sleeve; 202. First external terminal; 203. Miniature pH composite electrode; 3. Outer shell; 4. Signal processing module; 401. Circuit board; 402. Signal amplification circuit; 403. Analog-to-digital conversion circuit; 404. Microprocessor; 405. Wireless transmission unit; 5. Second external terminal; 6. Display screen; 7. Connector; 8. Electrode wire; 9. First interface; 10. Second interface; 11. Isolation plug; 12. Puncture needle; 13. Puncture needle seat; 14. Needle holder; 15. Infusion tubing; 16. Battery; 17. Charging interface; 18. Power indicator light; 19. Protective sleeve. Detailed Implementation

[0018] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example

[0020] Reference Figure 1-5 As shown, the present invention discloses a real-time monitoring device for intravascular blood pH value suitable for peripheral indwelling needles, comprising: an indwelling needle body 1; Miniature pH detection unit 2; Miniature pH detection unit 2 includes a fixing sleeve 201, a first external terminal 202, and a miniature pH composite electrode 203 for detecting blood pH value; The fixing sleeve 201 is disposed at one end of the indwelling needle body 1; The miniature pH composite electrode 203 is embedded in the outer wall of the fixing sleeve 201; The first external terminal 202 is disposed on the side of the miniature pH composite electrode 203 near the indwelling needle body 1; The outer casing 3 has a signal processing module 4 inside its cavity for processing the electrical signals collected by the micro pH detection unit 2; a second external terminal 5 is provided on one side of the outer casing 3; a display screen 6 and a connector 7 for detachably connecting the outer casing 3 and the indwelling needle body 1 are provided on the outer side wall of the outer casing 3; both the display screen 6 and the second external terminal 5 are connected to the signal processing module 4. Electrode wire 8; Electrode wire 8 is disposed inside the indwelling needle body 1; One end of electrode wire 8 is provided with a first interface 9 that matches the first external terminal 202, and the other end of electrode wire 8 is provided with a second interface 10 that matches the second external terminal 5.

[0021] In use, medical staff first insert the indwelling needle body 1 and the miniature pH detection unit 2 into the patient's peripheral vein according to the standard peripheral indwelling needle puncture procedure. Then, the outer shell 3 is installed on the end of the indwelling needle body 1 away from the miniature pH detection unit 2 through the connector 7, and the second external terminal 5 is connected to the second interface 10. Then, the signal processing module 4 is activated. After the miniature pH detection unit 2 comes into contact with the blood, the miniature pH composite electrode 203 detects the blood pH value and transmits it to the signal processing module 4 through the electrode wire 8. Finally, the signal processing module 4 processes the signal and transmits the pH value data to the display screen 6. The display screen 6 displays the detected pH value in real time. After the monitoring is completed, the device is removed. Disposable parts are disposed of as medical waste, and reusable parts (such as the outer shell 3 and its internal signal processing module 4) are disinfected and stored for future use.

[0022] The above technical solution, through the combination of components such as the miniature pH detection unit 2, the signal processing module 4, and the electrode wires, can monitor the dynamic changes in the patient's acid-base balance in real time without the need to extract blood gas samples, thus simplifying the monitoring process.

[0023] In this embodiment, the indwelling needle body 1 includes an indwelling needle seat 101 and an indwelling catheter 102; the indwelling needle seat 101 has a cavity inside; an isolation plug 11 is provided in the cavity; the indwelling catheter 102 is disposed at one end of the indwelling needle seat 101; a fixing sleeve 201 is disposed at the end of the indwelling catheter 102 away from the indwelling needle seat 101; the indwelling catheter 102 has a puncture chamber communicating with the cavity inside; a puncture needle 12 is provided in the puncture chamber; the puncture needle 12 penetrates the isolation plug 11.

[0024] In this embodiment, the end of the puncture needle 12 away from the indwelling catheter 102 is provided with a puncture needle seat 13 that matches the indwelling needle seat 101; a needle holding handle 14 is provided on the outer side wall of the puncture needle seat 13; after the indwelling needle body 1 completes the venous puncture, the medical staff pulls the puncture needle seat 13 and the puncture needle 12 out of the indwelling needle body 1 through the needle holding handle 14, and then quickly installs the outer shell 3 onto the indwelling needle seat 101 of the indwelling needle body 1 through the connector 7.

[0025] In this embodiment, the connector 7 is a snap-fit, which facilitates the quick positioning and installation of the outer shell 3 and the indwelling needle body 1.

[0026] In this embodiment, the miniature pH composite electrode 203 includes a reference electrode, a glass electrode, and a temperature compensation electrode. The reference electrode provides a stable potential reference; the glass electrode senses the hydrogen ion concentration in the blood; and the temperature compensation electrode collects the blood temperature in real time to achieve temperature calibration of the pH monitoring data and eliminate the influence of temperature on the detection accuracy. In use, after the miniature pH detection unit 2 comes into contact with the blood, the glass electrode senses the hydrogen ion concentration in the blood, the reference electrode provides a stable potential reference, and the temperature compensation electrode collects the blood temperature. The three work together to generate a weak electrical signal, which is transmitted to the signal processing module 4 through the electrode wire 8.

[0027] The above technical solution forms a galvanic cell with blood through a reference electrode and a glass electrode. The potential of this galvanic cell changes with the pH of the blood, enabling real-time monitoring of the pH value in the blood. At the same time, the temperature compensation electrode is used to calibrate the effect of temperature on the pH monitoring accuracy in real time, further improving the accuracy of the monitoring data and meeting the needs of precise clinical monitoring.

[0028] In this embodiment, the signal processing module 4 includes a circuit board 401; the circuit board 401 integrates a signal amplification circuit 402, an analog-to-digital conversion circuit 403, and a microprocessor 404; the signal amplification circuit 402 is connected to the second external terminal 5; the signal amplification circuit 402 is used to amplify electrical signals; the analog-to-digital conversion circuit 403 is connected to the signal amplification circuit 402; the analog-to-digital conversion circuit 403 is used to convert electrical signals into digital signals; the display screen 6 is connected to the microprocessor 404; the microprocessor 404 is used to process the digital signals and transmit the obtained pH value data to the display screen 6.

[0029] In this embodiment, a battery 16 is provided inside the outer casing 3; the battery 16 is connected to the signal processing module 4.

[0030] In this embodiment, a charging interface 17 is provided on the outer side wall of the outer casing 3; the charging interface 17 is connected to the battery 16 to facilitate charging of the battery 16.

[0031] In this embodiment, the charging interface 17 adopts a USB-C interface.

[0032] In this embodiment, the housing 3 is provided with a power indicator light 18 to remind the user of the power level of the battery 16; when the power is low, the power indicator light 18 will remind the user to avoid monitoring interruption due to insufficient power.

[0033] In this embodiment, a wireless transmission unit 405 is also integrated on the circuit board 401; the wireless transmission unit 405 is used to synchronously transmit the detection data to external terminal monitoring devices such as existing clinical monitors, nurse station central monitoring systems, and portable display devices.

[0034] In this embodiment, the outer wall of the indwelling needle holder 1 is provided with an infusion tubing 15 that communicates with the cavity inside it.

[0035] In this embodiment, the indwelling needle seat 101, the indwelling needle catheter 102, and the fixing sleeve 201 are an integral structure.

[0036] In this embodiment, a protective sleeve 19 is provided on the outside of the indwelling needle catheter 102.

[0037] In some other embodiments, the indwelling needle catheter 102 and the fixing sleeve 201 can be designed as separate structures according to usage needs, which facilitates the assembly and disassembly of the micro pH detection unit.

[0038] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A device for real-time monitoring of intravascular blood pH value suitable for peripheral indwelling needles, characterized in that, include: Indwelling needle body (1); A miniature pH detection unit (2); the miniature pH detection unit (2) includes a fixing sleeve (201), a first external terminal (202), and a miniature pH composite electrode (203) for detecting blood pH value; the fixing sleeve (201) is disposed at one end of the indwelling needle body (1); the miniature pH composite electrode (203) is embedded on the outer wall of the fixing sleeve (201); the first external terminal (202) is disposed on the side of the miniature pH composite electrode (203) close to the indwelling needle body (1); The outer shell (3) has a signal processing module (4) inside its cavity for processing the electrical signals collected by the micro pH detection unit (2); a second external terminal (5) is provided on one side of the outer shell (3); a display screen (6) and a connector (7) for detachably connecting the outer shell (3) to the indwelling needle body (1) are provided on the outer side wall of the outer shell (3); the display screen (6) and the second external terminal (5) are both connected to the signal processing module (4); Electrode wire (8); the electrode wire (8) is disposed inside the indwelling needle body (1); one end of the electrode wire (8) is provided with a first interface (9) that matches the first external terminal (202), and the other end of the electrode wire (8) is provided with a second interface (10) that matches the second external terminal (5).

2. The device for real-time monitoring of intravascular blood pH value suitable for peripheral indwelling needles according to claim 1, characterized in that, The indwelling needle body (1) includes an indwelling needle seat (101) and an indwelling catheter (102); the indwelling needle seat (101) has a cavity inside; an isolation plug (11) is provided in the cavity; the indwelling catheter (102) is disposed at one end of the indwelling needle seat (101); the fixing sleeve (201) is disposed at the end of the indwelling catheter (102) away from the indwelling needle seat (101); the indwelling catheter (102) has a puncture chamber inside that communicates with the cavity; a puncture needle (12) is provided in the puncture chamber; the puncture needle (12) penetrates the isolation plug (11).

3. The device for real-time monitoring of intravascular blood pH value suitable for peripheral indwelling needles according to claim 2, characterized in that, The puncture needle (12) has a puncture needle seat (13) at one end away from the indwelling catheter (102) that matches the indwelling needle seat (101); a needle holder (14) is provided on the outer side wall of the puncture needle seat (13).

4. The device for real-time monitoring of intravascular blood pH value suitable for peripheral indwelling needles according to claim 1, characterized in that, The miniature pH composite electrode (203) includes a reference electrode, a glass electrode, and a temperature compensation electrode; the reference electrode is used to provide a stable potential reference; the glass electrode is used to sense the concentration of hydrogen ions in the blood; and the temperature compensation electrode is used to collect blood temperature in real time to achieve temperature calibration of pH monitoring data and eliminate the influence of temperature on detection accuracy.

5. A real-time intravascular blood pH monitoring device suitable for peripheral indwelling needles according to claim 1, characterized in that, The signal processing module (4) includes a circuit board (401); the circuit board (401) integrates a signal amplification circuit (402), an analog-to-digital conversion circuit (403), and a microprocessor (404); the signal amplification circuit (402) is connected to the second external terminal (5); the signal amplification circuit (402) is used to amplify electrical signals; the analog-to-digital conversion circuit (403) is connected to the signal amplification circuit (402); the analog-to-digital conversion circuit (403) is used to convert electrical signals into digital signals; the display screen (6) is connected to the microprocessor (404); the microprocessor (404) is used to process the digital signals and transmit the obtained pH value data to the display screen (6).

6. A real-time intravascular blood pH monitoring device suitable for peripheral indwelling needles according to claim 5, characterized in that, The housing (3) contains a battery (16); the battery (16) is connected to the signal processing module (4).

7. A real-time intravascular blood pH monitoring device suitable for peripheral indwelling needles according to claim 6, characterized in that, A charging interface (17) is provided on the outer side wall of the outer casing (3); the charging interface (17) is connected to the battery (16).

8. A real-time intravascular blood pH monitoring device suitable for peripheral indwelling needles according to claim 7, characterized in that, The outer casing (3) is provided with a power indicator light (18) to remind the battery (16) of its power level.

9. A real-time intravascular blood pH monitoring device suitable for peripheral indwelling needles according to claim 5, characterized in that, The circuit board (401) also integrates a wireless transmission unit (405); the wireless transmission unit (405) is used to synchronously transmit the detection data to an external terminal monitoring device.

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