Implantable wireless blood pressure monitoring device

Abstract

The utility model relates to an implantable wireless blood pressure monitoring device, which belongs to the technical field of physiological parameter measuring instruments, and comprises an upper shell, a lower shell, an adjusting plate, a circuit board, a sealing element and a sensor, the upper shell and the lower shell are fixedly connected to form a whole shell, the circuit board is arranged in the whole shell, a circuit element is arranged on the circuit board, and the sensor is arranged in the whole shell. The adjusting plate is located between the upper shell and the circuit board, the sensor is located outside the whole shell and is electrically connected with the whole shell through a first end of the transmission line, a limiting groove is formed in the upper shell, the sealing piece is arranged in the limiting groove, a sealing plate is arranged at the position, corresponding to the limiting groove, of the lower shell, and the sealing plate and the limiting groove are correspondingly attached to each other. The transmission line is used for wrapping and sealing the sealing piece, and the first end of the transmission line penetrates through the sealing piece and is located outside the whole shell. The length of the sensor in the device can be adjusted according to needs, so that the sensor can better adapt to the specific anatomical structure of a patient, and it is ensured that the sensor can accurately and stably monitor blood pressure.

Description

Technical Field

[0001] This utility model belongs to the technical field of physiological parameter measurement instruments, specifically an implantable wireless blood pressure monitoring device. Background Technology

[0002] Invasive blood pressure monitoring technology is primarily used during cardiac surgery and other major surgeries to monitor real-time changes in blood pressure. This monitoring technology is crucial for ensuring the quality of surgical anesthesia and optimizing intraoperative hemodynamic management. Traditional invasive blood pressure monitoring involves inserting a catheter into a blood vessel at the measurement site via puncture. The outer end of the catheter is directly connected to a seal, utilizing the pressure transmission effect of fluid to transfer the pressure within the blood vessel to the external seal, thereby obtaining a dynamic waveform of real-time pressure changes within the blood vessel. Traditional measurement methods require the patient to remain immobile and necessitate regular flushing of the catheter with irrigation fluid. Furthermore, the pressure transmission process can affect the accuracy of blood pressure measurement.

[0003] Chinese utility model patent CN217430006U discloses an implantable blood pressure monitor, comprising a base, a confinement dam, a pressure sensing element, a circuit board, a flexible cover, and a wrapping layer. The base supports the confinement dam, pressure sensing element, circuit board, and flexible cover. The confinement dam and flexible cover encapsulate the pressure sensing element and circuit board. The pressure sensing element collects blood pressure information and is electrically connected to the circuit board. The circuit board includes RFID circuit elements, power supply circuit elements, and a memory. The wrapping layer covers the base, confinement dam, and flexible cover. This monitor implants the pressure sensing element into the human body for measurement. However, due to differences in human anatomy, and variations in the location, depth, and shape of blood vessels among different patients, the monitor cannot be adjusted according to the patient's individual needs, cannot adapt to the anatomical structure of the implantation site, and is prone to dislodgement, leading to unstable measurements. Utility Model Content

[0004] The purpose of this invention is to provide an implantable wireless blood pressure monitoring device that solves the problem in the prior art where the device cannot be adjusted according to the patient's anatomical structure, resulting in unstable measurements.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An implantable wireless blood pressure monitoring device includes an upper shell, a lower shell, an adjustment plate, a circuit board, a seal, and a sensor. The upper and lower shells are fixedly connected to form a complete housing. The circuit board is disposed within the complete housing and has circuit components. The adjustment plate is located between the upper shell and the circuit board. The sensor is located outside the complete housing and is electrically connected via a first end of a transmission line. The upper shell has a limiting groove, and the seal is placed within the limiting groove. A sealing plate is disposed on the lower shell corresponding to the position of the limiting groove. The bottom of the limiting groove is open, and the sealing plate is placed within the open bottom of the limiting groove. The first end of the transmission line passes through the sealing plate. The sealing element is located outside the entire housing. A through hole is opened in the middle of the adjustment plate. The second end of the transmission line extends spirally from the outside to the inside along the sealing plate, passes through the through hole, and is fixed to the circuit board and electrically connected to the circuit components on the circuit board. A fixing post is provided at the bottom of the adjustment plate. The fixing post passes through the through hole and is fixedly connected to the upper shell. A coil spring is wound on the fixing post. The inner end of the coil spring is fixedly connected to the fixing post, and the outer end of the coil spring is fixedly connected to the adjustment plate. A locking ring is provided on the lower shell. A locking post is connected to the locking ring through an elastic element. Several slots are opened on the adjustment plate. A clearance groove is opened on the circuit board corresponding to the position of the locking ring.

[0007] A power supply is provided on the lower shell for supplying power.

[0008] Optionally, the upper and lower shells are fixed together using an adhesive sealing process.

[0009] Optionally, the locking pin is a magnetic block.

[0010] Optionally, the lower shell has a groove.

[0011] Optionally, the groove is provided with reinforcing ribs.

[0012] Optionally, the upper shell is a circular shell with an upward bulge in the middle, and the adjusting plate is a circular plate with an upward bulge in the middle.

[0013] Optionally, the size of the seal is larger than the size of the limiting groove, and the seal has an expansion joint.

[0014] Optionally, the adjusting plate has a fixing groove, and the outer end of the coil spring is bent upward and inserted into the fixing groove.

[0015] Optionally, the fixing post has a slot, and the inner end of the coil spring is inserted into the slot.

[0016] Optionally, the circuit board is provided with a wire clamp, and the transmission line card is placed inside the wire clamp.

[0017] Optionally, the sensor is a piezoresistive sensor.

[0018] The beneficial effects of this utility model are as follows:

[0019] The sensor can be adjusted in length as needed to better fit the patient's specific anatomy, ensuring that the sensor can accurately and stably monitor blood pressure;

[0020] The upper and lower shells are fixedly connected, and the sealing element fits tightly in the limiting groove, thus achieving a complete seal of the shell and preventing body fluid from entering the implant. The sealed device has a smooth and flat surface, is not easy to break, and has no obvious gaps or protrusions, making it less likely to cause rejection after implantation.

[0021] The recessed design reduces the overall weight and volume of the implant, making it easier to insert and reducing discomfort to patients or animals. It also reduces wireless signal attenuation and increases the transmission distance of the wireless signal.

[0022] The round upper shell can better fit the tissue at the implantation site, reducing friction and pressure on the tissue, thereby improving post-implantation comfort, reducing trauma during implantation and removal, reducing postoperative complications, and shortening recovery time. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0024] Figure 1 This is an exploded view of the implantable wireless blood pressure monitoring device of this utility model;

[0025] Figure 2 This is a three-dimensional structural diagram of the adjustment plate of the implantable wireless blood pressure monitoring device of this utility model. The circuit board is hidden to facilitate the demonstration of the relationship between the locking post and the slot.

[0026] Figure 3 This is a three-dimensional structural diagram of the entire casing of the implantable wireless blood pressure monitoring device of this utility model.

[0027] The components are as follows: 1. Upper shell; 2. Transmission line; 3. Limiting groove; 4. Card slot; 5. Adjusting plate; 6. Sealing element; 61. Expansion joint; 7. Coil spring; 8. Locking post; 9. Power supply; 10. Circuit board; 11. Locking ring; 12. Lower shell; 13. Sealing plate; 14. Groove; 15. Fixing groove; 16. Fixing post; 17. Perforation; 18. Sensor. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0029] The following detailed description is exemplary and intended to provide further detailed explanation of the present invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] An implantable wireless blood pressure monitoring device includes an upper shell 1, a lower shell 12, an adjustment plate 5, a circuit board 10, a sealing element 6, and a sensor 18.

[0032] The upper shell 1 and the lower shell 12 are fixedly connected to form a complete shell;

[0033] The circuit board 10 is disposed within the housing, and circuit elements are disposed on the circuit board 10;

[0034] The circuit components include a signal converter, a filter amplifier, and a wireless signal transmitter. The electrical signal from the piezoresistive sensor is filtered and amplified by the filter amplifier, converted into a digital signal by the signal converter, and then transmitted to an external terminal by the wireless signal transmitter.

[0035] The adjustment plate 5 is located between the upper shell 1 and the circuit board 10. The sensor 18 is located outside the entire shell and is electrically connected through the first end of the transmission line 2. The upper shell 1 is provided with a limiting groove 3, and the sealing member 6 is placed in the limiting groove 3.

[0036] A sealing plate 13 is provided on the lower shell 12 at the position corresponding to the limiting groove 3. The bottom of the limiting groove 3 is open, and the sealing plate 13 is inserted into the opening at the bottom of the limiting groove 3. Then, the sealing member 6 seals the passage between the limiting groove 3 and the sealing plate 13 to seal the interior of the entire shell. The first end of the transmission line 2 passes through the sealing member 6 and is located outside the entire shell. A through hole 17 is opened in the middle of the adjusting plate 5. The second end of the transmission line 2 extends spirally from the outside to the inside along the surface of the adjusting plate 5, then passes through the through hole 17 and is fixed to the circuit board 10, and is connected to the power supply. The circuit components on the circuit board 10 are electrically connected. The spiral winding can accommodate more transmission lines 2 and occupy less space. The bottom of the adjustment plate 5 is provided with a fixing post 16. The fixing post 16 passes through the through hole 17 and is fixedly connected to the upper shell 1. A coil spring 7 is wound on the fixing post 16. The inner end of the coil spring 7 is connected to the fixing post 16, and the outer end of the coil spring 7 is fixedly connected to the adjustment plate 5. The lower shell 12 is provided with a locking ring 11. A locking post 8 is connected to the locking ring 11 through an elastic element. The locking post 8 can be stored in the locking ring 11.

[0037] The adjustment plate 5 has several slots 4 on its outer periphery, and the circuit board 10 has a clearance slot corresponding to the locking ring 11. Since the circuit board 10 is located between the adjustment plate 5 and the lower shell 12, the clearance slot allows the locking pin 8 to pass through and enter the slot 4.

[0038] A power supply 9 is provided on the lower shell 12 for supplying power.

[0039] As a preferred embodiment of the above embodiments, the transmission line 2 is wrapped with a biocompatible material, and the entire housing is made of a biocompatible material.

[0040] As a preferred embodiment of the above embodiments, the upper shell 1 and the lower shell 12 are fixed by a potting sealant process, which results in a stable connection and good sealing performance.

[0041] As a preferred embodiment of the above embodiments, the locking post 8 is a magnetic block. Before being implanted in the body, the locking post 8 passes through the clearance groove and is placed in the slot 4. When it is necessary to adjust the extension length of the transmission line, an external magnet provides an attractive force to the locking post 8 from the bottom, causing the locking post 8 to overcome the elastic force of the elastic element and retract into the locking ring 11, and exit from the slot 4 on the adjustment plate 5, thereby unlocking the adjustment plate 5. At this time, the extension length of the transmission line 2 can be adjusted, which is convenient to operate.

[0042] As a preferred embodiment of the above embodiments, the lower shell 12 has a groove 14 at the position corresponding to the wireless signal transmitter, which reduces the overall weight of the implant, making it easier to implant and reducing discomfort to patients or experimental animals, and also reduces the attenuation of the wireless signal and increases the transmission distance of the wireless signal.

[0043] As a preferred embodiment of the above embodiments, the groove 14 is provided with reinforcing ribs to ensure the structural strength of the groove 14.

[0044] As a preferred embodiment of the above embodiments, the upper shell 1 is a circular shell with an upward bulge in the middle, and the adjusting plate 5 is a circular plate with an upward bulge in the middle. The entire shell surface is flat and smooth, protecting the entire shell from breakage. There are no obvious gaps or protrusions, and it is not easy to cause rejection after implantation.

[0045] As a preferred example of the above embodiments, the seal 6 is made of silicone material.

[0046] As a preferred embodiment of the above embodiments, the size of the sealing element 6 is larger than the size of the limiting groove 3, and the sealing element 6 has an expansion gap 61. When the limiting groove 3 and the limiting plate limit the sealing element 6, since the size of the sealing element 6 is larger than the limiting groove 3, the sealing element 6 is compressed and squeezes the expansion gap 61, so that the sealing element 6 adapts to the limiting groove 3 and has a good sealing effect.

[0047] As a preferred embodiment of the above embodiments, the sealing element 6 is composed of upper and lower sealing blocks, and the sealing blocks have arc-shaped grooves. The two arc-shaped grooves correspond to form a circular groove for the transmission line 2 to pass through.

[0048] As a preferred embodiment of the above embodiments, the adjusting plate 5 has a fixing groove 15, the outer end of the coil spring 7 is bent upward and inserted into the fixing groove 15, the fixing post 16 has a slot, and the inner end of the coil spring 7 is bent and inserted into the slot.

[0049] As a preferred embodiment of the above embodiments, the circuit board 10 is provided with a wire clamp, and the transmission line 2 is placed in the wire clamp. The transmission line 2 is fixed by the wire clamp, which facilitates the subsequent pulling of the transmission line 2.

[0050] As a preferred example of the above embodiments, the sensor 18 is a piezoresistive sensor. The electrical signal is transmitted to the filter amplifier through the transmission line 2. After filtering and amplification, the electrical signal is sampled, quantized, and encoded into a digital signal by the signal converter. The signal is then transmitted to the external host computer workstation by the wireless signal transmitter for processing and display. The patient's pressure data is measured and transmitted to the host computer workstation via wireless signal. The workstation is responsible for calculating and displaying the patient's vital signs parameters based on the data, and predicting the patient's risk of hypotension using a big data model based on artificial intelligence technology.

[0051] As a preferred embodiment of the above embodiments, the wireless transmitter is implemented using Bluetooth Low Energy technology, which achieves lower power consumption, faster data transmission speed and longer transmission distance. At the same time, it supports frequency hopping transmission, improves the anti-interference capability of the signal, and further extends the transmission distance and data transmission security.

[0052] In the initial state, the coil spring 7 is in an expanded state, and the locking post 8 is locked in the slot 4 on the adjusting plate 5 for limiting and fixing. The adjusting plate 5 and the upper shell 1 cooperate to limit the transmission line 2. The transmission line 2 first passes around the fixing post and then coils along the upper surface of the adjusting plate 5. When monitoring is required, the sensor 18 is implanted into the artery where blood pressure monitoring is required, and the entire shell is implanted into the tissue close to the artery. The transmission line 2 passes through the tissue.

[0053] Before implantation, the length of the transmission line 2 is adjusted according to the distance between the housing and the sensor 18. When it is necessary to shorten the transmission line 2, the electromagnet is placed at the bottom of the housing. The electromagnet attracts the locking pin 8, causing the locking pin 8 to retract from the slot 4 and into the locking ring 11. At this time, the coil spring 7 retracts, driving the adjusting plate 5 to rotate. The rotation of the adjusting plate 5 causes the transmission line 2 to continue to spirally retract between the adjusting plate 5 and the upper housing 1, thereby shortening the length of the external transmission line 2. At the same time, the user holds the sensor 18 and stops the transmission line 2 from retracting when the sensor 18 retracts to the appropriate position. Simultaneously, the electromagnet is removed, causing the locking pin 8 to spring upward under the reset action of the elastic element and re-insert into the corresponding slot 4. The adjusting plate 5 is positioned to prevent further rotation, thus shortening the transmission line 2. At this point, the sensor 18 can be implanted into the corresponding tissue. When it is necessary to extend the transmission line 2, an electromagnet is used to attract the locking pin 8, causing it to retract from the slot 4 and into the locking ring 11. Simultaneously, the user holds the sensor 18 and pulls it. When the sensor 18 reaches the appropriate position, the transmission line 2 is stopped from extending further. The electromagnet is then removed, causing the locking pin 8 to spring back upwards under the reset action of the elastic element and re-insert into the corresponding slot 4, thus positioning the adjusting plate 5 to prevent further rotation and extending the transmission line 2. At this point, the sensor 18 can be implanted into the corresponding tissue.

[0054] In addition, this device can also be used for blood pressure monitoring in animals.

[0055] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. An implantable wireless blood pressure monitoring device, characterized in that, The utility model relates to a kind of temperature and humidity sensor, including upper shell (1), lower shell (12), adjusting plate (5), circuit board (10), sealing element (6), sensor (18), the upper shell (1) and lower shell (12) fixed connection form whole shell, the circuit board (10) is arranged in whole shell, and circuit element is provided on the circuit board (10); The adjusting plate (5) is located between the upper shell (1) and the circuit board (10), and the sensor (18) is located outside the whole shell and is electrically connected by the first end of the transmission line (2); The upper shell (1) is provided with a limiting groove (3), the sealing element (6) is placed in the limiting groove (3), the bottom of the limiting groove (3) is open, and the lower shell (12) is provided with a sealing plate (13) corresponding to the position of the limiting groove (3), and the sealing plate (13) is placed in the open bottom of the limiting groove (3); The first end of the transmission line (2) penetrates the sealing element (6) and is located outside the whole shell, the middle of the adjusting plate (5) is provided with a perforation (17), the second end of the transmission line (2) extends spirally from outside to inside along the sealing plate (13) and penetrates the perforation (17), and then is fixed with the circuit board (10) and is electrically connected with the circuit element on the circuit board (10); The bottom of the adjusting plate (5) is provided with a fixed column (16), the fixed column (16) penetrates the perforation (17) and is fixedly connected with the upper shell, the fixed column (16) is wound with a coil spring (7), the inner end of the coil spring (7) is fixedly connected with the fixed column (16), and the outer end of the coil spring (7) is fixedly connected with the adjusting plate (5); The lower shell (12) is provided with a locking ring (11), the locking ring (11) is connected with a locking column (8) by an elastic element, the adjusting plate (5) is provided with a plurality of clamping grooves (4), and the circuit board (10) is provided with an avoiding groove corresponding to the position of the locking ring (11); The lower shell (12) is provided with a power supply (9).

2. The implantable wireless blood pressure monitoring device of claim 1, wherein, The locking column (8) is a magnetic block.

3. The implantable wireless blood pressure monitoring device of claim 1, wherein, The lower shell (12) is provided with a groove (14).

4. The implantable wireless blood pressure monitoring device of claim 3, wherein, The groove (14) is provided with a reinforcing rib.

5. The implantable wireless blood pressure monitoring device of claim 1, wherein, The upper shell (1) is a circular shell, the middle part is upwardly protruding, the adjusting plate (5) is a circular plate, and the middle part is upwardly protruding.

6. The implantable wireless blood pressure monitoring device of claim 1, wherein, The size of the sealing element (6) is greater than the size of the limiting groove (3).

7. The implantable wireless blood pressure monitoring device of claim 1, wherein, The sealing element (6) is provided with a expansion joint (61).

8. The implantable wireless blood pressure monitoring device of claim 1, wherein, The adjusting plate (5) is provided with a fixed groove (15), and the outer end of the coil spring (7) is upwardly bent and inserted into the fixed groove (15).

9. The implantable wireless blood pressure monitoring device of claim 1, wherein, The fixed column (16) is provided with a slot, and the inner end of the coil spring (7) is bent and inserted into the slot.

10. The implantable wireless blood pressure monitoring device of claim 1, wherein, The circuit board (10) is provided with a wire clamp, and the transmission line (2) is clamped in the wire clamp.

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