CN105140638B - An implantable medical detector - Google Patents

Abstract

The invention discloses an implantable medical detector, which includes an implantable electronic medical unit, and a disc-shaped bottom case, the bottom case is provided with an accommodating chamber for accommodating the implantable electronic medical unit; There is an isolation disc covering the opening of the bottom case; the isolation disc is provided with a disc-shaped middle case for placing the antenna; it also includes a cover case for covering the opening of the middle case; The communication antenna used for communication between the electronic medical unit and the outside world; it has a reasonable structure, no tingling sensation to the human body, reasonable internal structure settings, wide frequency range of the antenna placed inside it, good isolation, and high gain; it is implantable The research and development of medical diagnostic devices provides better installation modules. Companies only need to design their own implantable electronic medical units into the shape, thickness or size that can be placed in the bottom case to achieve better communication quality.

Description

An implantable medical detector

technical field

The present invention relates to an implantable medical detector.

Background technique

At present, there are many types of implanted medical devices, such as implanted cardiac pacemakers, brain pacemakers, nerve stimulators, muscle stimulators, ECG recorders, etc., and now there are diagnostic devices implanted in the human body. For real-time diagnosis of patient's heartbeat, pulsation, blood pressure or other information, like other implantable medical devices, it still needs to communicate with the outside world in order to transmit the information in real time. At present, the diagnostic device generally consists of a uniquely designed small device box and an implanted electronic medical unit in the device box; plus an antenna for connecting the implanted electronic medical unit to the outside world, the implanted electronic medical unit generally Contains detection circuit, detector, battery, etc. However, implantable medical diagnostic devices have certain problems, including battery life, materials, etc., but one of the biggest problems is the quality of communication. Due to the limited space of implantable medical diagnostic devices, they are often placed in The antennas in it all have shortcomings such as narrow frequency range, poor isolation, and low gain, which seriously affect the quality of communication and thus the quality of diagnosis. Therefore, it is an urgent problem to be solved urgently to design an implantable medical device whose built-in antenna can have greater isolation and wider frequency range; in addition, the structure of the implantable medical diagnostic device also needs to be solved The structure, the device can effectively reduce the tingling sensation on the body, and the structure is reasonable.

Contents of the invention

The object of the present invention is to overcome the disadvantages mentioned above and provide an implantable medical detector.

In order to achieve the above object, the specific solution of the present invention is as follows: An implantable medical detector includes an implanted electronic medical unit, and also includes a disc-shaped bottom case, and the bottom case is provided with a device for containing the implanted electronic device. The accommodating cavity of the medical unit; it also includes an isolation plate covering the opening of the bottom case; the isolation plate is provided with a disc-shaped middle case for placing the antenna; it also includes a cover case for covering the opening of the middle case; the middle case There is a communication antenna for the implantable electronic medical unit to communicate with the outside world.

Wherein, the top of the cover shell is an arc surface.

Wherein, the communication antenna includes a circular first PCB substrate and a microstrip antenna arranged on the top surface of the first PCB substrate; the microstrip antenna includes a first radiation unit and a second radiation unit having the same size and symmetrical unit; each radiating unit includes an arc-shaped first radiating arm, a triangular second radiating arm extending toward the center from the first radiating arm, and a triangular second radiating arm extending toward the center from the first radiating arm Three radiating arms, the second radiating arm is set in the area surrounded by the third radiating arm and the first radiating arm; it also includes a trapezoidal fourth radiating arm extending from the first radiating arm to the center, the first radiating arm The three radiating arms are arranged in the area surrounded by the fourth radiating arm and the first radiating arm; multiple semicircular isolation gaps are provided on the trapezoidal straight side of the fourth radiating arm; the first radiating unit includes A first parasitic dipole arm extending obliquely upward from an upper hypotenuse of its fourth radiating arm, and a second parasitic dipole arm extending laterally from the free end of the first parasitic dipole arm; the second radiating unit including a third parasitic dipole arm extending obliquely downward from a lower hypotenuse of its fourth radiating arm, and a fourth parasitic dipole arm extending laterally from the free end of the third parasitic dipole arm;

A rectangular parasitic oscillator unit is provided between the two radiating units, the left and right sides of the rectangular parasitic oscillator unit are zigzag, and a plurality of rectangular notches are arranged side by side in the middle of the rectangular parasitic oscillator unit;

The back of the first PCB substrate is provided with two feeding coupling holes respectively corresponding to the two first dipole arms;

The isolation disc is a disc-shaped isolation disc, and the isolation disc includes a second PCB substrate and a circular magnetic flux hole arranged on the second PCB substrate; the top surface of the second PCB substrate is also provided with a vertically symmetrical Two isolation strips, each of which includes a transverse isolation bar, the two ends of the transverse isolation bar are provided with a first vertical isolation bar, between the two first vertical isolation bars extends a The second vertical spacer bar in the same direction as the first vertical spacer bar, the length of the second vertical spacer bar is shorter than the first vertical spacer bar, and the middle of the two second vertical spacer bars extends from the transverse spacer bar with a a third spacer bar in the same direction as the first vertical spacer bar, and the length of the third spacer bar is shorter than that of the second vertical spacer bar.

Wherein, the angle of the angle close to the center of the second radiation arm is the same as the angle of the angle close to the center of the third radiation arm, and both are greater than 15° and less than 60°.

Wherein, the distance between the rectangular gaps is set to M; the number of rectangular gaps is set to N; the length of the second parasitic dipole arm and the fourth parasitic dipole arm are the same and the lengths are both set to K; the K=M*0.25* N; the units of M and K are millimeters.

Wherein, the angle of the second radiation arm close to the center is 35 degrees.

Wherein, a first isolation ring is provided on the edge of the top surface of the first PCB substrate, and a second isolation ring is provided on the edge of the bottom surface of the first PCB substrate.

Wherein, the specific M is 0.8 mm; the N is 48, and the length of the K is 9.6 mm.

Wherein, the bottom surface of the bottom shell and the top surface of the cover shell are both provided with binding grooves for fastening them together;

Wherein, the outer surfaces of the bottom shell and the cover shell are sprayed with a food-grade anti-corrosion coating;

Wherein, a sealing rubber ring is provided on the opening of the bottom case, and a sealing rubber ring is also provided on the opening of the middle case.

The beneficial effects of the present invention are as follows: its structure is reasonable, it has no tingling sensation to the human body, its internal structure is set reasonably, the frequency range of the antenna placed inside it is wide, its isolation is good, and its gain is high; R&D provides a better installation module, and each company only needs to design its own implantable electronic medical unit into a shape, thickness or size that can be placed in the bottom case, and then it can achieve better communication quality.

Description of drawings

Fig. 1 is a sectional view of the present invention throwing away the antenna part;

Fig. 2 is a top view of the communication antenna of the present invention;

Fig. 3 is the top view of the isolation disc of the present invention;

Fig. 4 is the bottom view of the first PCB substrate of the present invention;

Fig. 5 is a top view of the communication antenna of the present invention;

Fig. 6 is the simulation test diagram of the frequency range when the communication antenna of the present invention does not match the isolation plate;

Fig. 7 is the simulation test diagram of the frequency range when the communication antenna of the present invention is matched with the isolation plate;

Fig. 8 is a directional diagram of the communication antenna of the present invention;

Explanation of reference numerals among Fig. 1 to Fig. 8:

1-bottom shell; 2-isolation plate 3-middle shell; 4-sealing rubber ring; 5-cover shell; 6-binding groove;

71-the first PCB substrate; 711-the first isolation ring; 712-the first radiation arm; 713-the second radiation arm; 714-the third radiation arm; 715-the fourth radiation arm; 716-the first parasitic oscillator arm; 717-second parasitic oscillator arm; 721-rectangular parasitic oscillator unit; 722-rectangular notch; 731-third parasitic oscillator arm; 732-fourth parasitic oscillator arm; 741-second isolation ring; 742-feed coupling hole;

8-the second PCB substrate; 81-the horizontal spacer bar; 82-the first vertical spacer bar; 83-the second vertical spacer bar; 84-the third straight spacer bar.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, and the implementation scope of the present invention is not limited thereto.

Example 1:

As shown in Figures 1 to 8, an implantable medical detector described in this embodiment includes an implantable electronic medical unit, and also includes a disc-shaped bottom case 1, and the bottom case 1 is provided with a The accommodation cavity for accommodating the implanted electronic medical unit; also includes an isolation disc 2 covering the opening of the bottom case 1; the isolation disc 2 is provided with a disc-shaped middle case 3 for placing the antenna; it also includes a spacer for covering the middle case 3. An open cover shell 5; the middle shell 3 is provided with a communication antenna for allowing the implantable electronic medical unit to communicate with the outside world. In the implantable medical detector described in this embodiment, the top of the cover shell 5 is an arc surface. The present invention provides a better installation module for the research and development of implantable medical diagnostic devices, and each company only needs to design its own implantable electronic medical unit into a shape, thickness or size that can be inserted into the bottom case 1, and it is convenient Can achieve better communication quality. In the implantable medical diagnostic device described in this embodiment, the top of the cover shell 5 is an arc surface. It can effectively prevent patients from being stabbed or stinged, and relieve the patient's implantation pain.

Described a kind of implantable medical detector, described communication antenna comprises the first circular PCB substrate 71, the microstrip antenna that is located at the top surface of the first PCB substrate 71; The microstrip antenna comprises the same size and Left-right symmetrical first radiation unit and second radiation unit; each radiation unit includes an arc-shaped first radiation arm 712, and the first radiation arm 712 extends a triangular second radiation arm 713 toward the center, so The first radiating arm 712 also extends a triangular third radiating arm 714 toward the center, and the second radiating arm 713 is arranged in the area surrounded by the third radiating arm 714 and the first radiating arm 712; The trapezoidal fourth radiating arm 715 extending from the first radiating arm 712 to the center, the third radiating arm 714 is arranged in the area enclosed by the fourth radiating arm 715 and the first radiating arm 712; the fourth radiating arm The trapezoidal straight side of 715 is provided with a plurality of semicircular isolation gaps; the first radiating unit includes a first parasitic dipole arm 716 extending obliquely upward from an upper hypotenuse of its fourth radiating arm 715, A second parasitic dipole arm 717 extends laterally from the free end of the first parasitic dipole arm 716; The third parasitic dipole arm 731, the free end of the third parasitic dipole arm 731 also has a fourth parasitic dipole arm 732 extending laterally; a rectangular parasitic dipole unit 721 is arranged between the two radiation units, and the rectangular parasitic dipole unit 721 The left and right sides of the vibrator unit 721 are zigzag, and the middle of the rectangular parasitic vibrator unit 721 is provided with a plurality of rectangular notches 722 side by side; the back of the first PCB substrate 71 is provided with two The corresponding feed coupling hole 742; the isolation disc 2 is a disc-shaped isolation disc 2, the isolation disc 2 includes a second PCB substrate 8, and a circular magnetic flux hole arranged on the second PCB substrate 8; the The top surface on the second PCB substrate 8 is also provided with two vertically symmetrical isolation strips, each of which includes a transverse isolation bar 81, and the two ends of the transverse isolation bar 81 are provided with first vertical isolation bars 82 , a second vertical spacer bar 83 with the same direction as the first vertical spacer bar 82 extends from the transverse spacer bar 81 between the two first vertical spacer bars 82, and the second vertical spacer bar 83 is larger than the first vertical spacer bar The length of 82 is short, and in the middle of the two second vertical spacer bars 83, a third spacer bar with the same direction as the first vertical spacer bar 82 extends from the transverse spacer bar 81, and the third spacer bar is more spaced than the second vertical spacer bar. The length of the rod 83 is short. Through no less than 550 times of microstrip circuit structure design, and no less than 500 times of simulation tests and parameter adjustments, the above antenna structure and the structure of the isolation plate matched with it are finally determined. The wide frequency range, good isolation, directivity and gain performance fully meet the requirements of use and improve the communication performance of implantable medical devices.

Especially when the structural isolation board is removed or an ordinary metal isolation board is placed, as shown in Figure 6, the available frequency range of the antenna bandwidth is still as high as 1.7GHz to 2.65GHz; it basically meets the requirements of the communication frequency band, and its gain is also high, and the average gain in the frequency band Greater than 8.952dBi; meet the needs of actual use. The design of the shape isolation plate is also obtained through simulation and continuous experiment design. Among them, when the isolation plate is placed with other prior art antennas, including the spiral three-dimensional antenna, the matching is not high, and the isolation performance is not significantly enhanced. In the test For ordinary antennas, with this isolation board, the average gain increases by 0.01-0.15dBi or does not increase, the isolation performance remains unchanged, and the frequency band does not change. However, in the actual test and the simulation before the test, it can be known that when the communication antenna in this scheme is tested with the isolation board of this scheme, the bandwidth, isolation, and gain of the communication antenna of this scheme are all higher than those without the isolation board. When the antenna design, the simulated value after matching is shown in Figure 7. The available frequency range of the overall antenna system bandwidth has reached 1.6GHz to 2.85GHz; its gain has also increased significantly, and the average gain in the frequency band is greater than 9.4dBi, which is about 0.3dBi higher than that; The performance is good, as shown in Figure 6, it can be seen in S3 that the isolation in the frequency range is greater than 25.5dB. Its directivity is also good, as shown in Figure 8, it is an omnidirectional antenna.

Example 2:

The difference between the implantable medical detector described in this embodiment and Embodiment 1 is that specific optimal parameters are set, so that the antenna structure is more stable, and the communication performance is more reliable and stable without jumping; specifically, the The angle of the angle near the center of the second radiation arm 713 is the same as the angle of the angle of the third radiation arm 714 near the center, and both are greater than 15° and less than 60°. In the implantable medical detector described in this embodiment, the distance between the rectangular notches 722 is set as M; the number of the rectangular notches 722 is set as N; the lengths of the second parasitic oscillator arm 717 and the fourth parasitic oscillator arm 732 are set The same and the length is set as K; the K=M*0.25*N; the unit of M and K is millimeter. After setting the above parameter limits, it is found through a large number of experiments and simulations that the gain is more stable and the isolation is maintained at a high level. The above parameters are obtained through continuous testing and adjustment, which are the most stable and best performance specific parameters. The specific actual test result is calculated by HFSS15 software. The available frequency range of the overall system antenna bandwidth is 1.6GHz to 2.8GHz internal frequency modulation; The average gain in the frequency band is greater than 9.35dBi, and the impedance is reduced; the isolation in the frequency range is greater than 26dB; in the actual test, it is found that changes in the external environment, such as changes in the influence of temperature and magnetic field, are within a certain range, for example, when the temperature is around 10 degrees For amplitude changes, when the above parameters and specific values are used, the stability is very strong and the frequency band retention is good.

Preferably, in the implantable medical detector described in this embodiment, the angle of the second radiation arm 713 close to the center is 35 degrees. In the implantable medical detector described in this embodiment, a first isolation ring 711 is provided on the edge of the top surface of the first PCB substrate 71, and a second isolation ring 711 is provided on the edge of the bottom surface of the first PCB substrate 71. Circle 741. It is used to increase the bottom isolation of the first PCB substrate 71 . In the implantable medical detector described in this embodiment, specifically, the M is 0.8mm; the N is 48 pieces, and the length of the K is 9.6mm.

An implantable medical diagnostic device described in this embodiment, the bottom surface of the bottom shell 1 and the top surface of the cover shell 5 are provided with binding grooves 6 for fastening the two together; An implantable medical diagnostic device, the outer surfaces of the bottom shell 1 and the cover shell 5 are sprayed with a food-grade anti-corrosion coating; used for anti-corrosion and improving the service life of the present invention; an implantable diagnostic device described in this embodiment In the medical diagnostic device, a sealing rubber ring 4 is provided on the opening of the bottom case 1 , and a sealing rubber ring 4 is also provided on the opening of the middle case 3 . To prevent blood or tissue fluid from entering the wall and causing damage to the device.

The above is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, features and principles described in the patent application scope of the present invention are included in the protection scope of the patent application of the present invention.

Claims (6)

1. an implantable medical detector, includes implanted electron medical treatment unit, it is characterised in that: also include plate-like drain pan (1), in described drain pan (1), be provided with the accommodation chamber for holding implanted electron medical treatment unit; Also include the separator (2) being covered in drain pan (1) opening; Described separator (2) is provided with the plate-like mesochite (3) for placing antenna; Also include the lid shell (5) for covering mesochite (3) opening; It is provided with for allowing the communication antenna of implanted electron medical treatment unit communication with the outside world in described mesochite (3);

The bottom surface of described drain pan (1) and the end face of lid shell (5) are equipped with the binding groove (6) for both being tightened together;

The top of described lid shell (5) is arc surface;

Described communication antenna includes first PCB substrate (71) of circle, is located at the microstrip antenna of the first PCB substrate (71) end face; Described microstrip antenna includes that size is identical and symmetrical first radiating element and the second radiating element; Each radiating element all includes the first radiation arm (712) in arcuation, described first radiation arm (712) extends second radiation arm (713) of a triangle to center, described first radiation arm (712) also extends the 3rd radiation arm (714) of a triangle to center, and described second radiation arm (713) is located in the region that the 3rd radiation arm (714) and the first radiation arm (712) surround; Also including the 4th trapezoidal radiation arm (715) extended from the first radiation arm (712) to center, described 3rd radiation arm (714) is located in the region that the 4th radiation arm (715) and the first radiation arm (712) surround; The trapezoidal straight flange of described 4th radiation arm (715) is provided with multiple semicircular isolation breach; Described first radiating element includes the first parasitic oscillator arms (716) that hypotenuse extends obliquely from of its 4th radiation arm (715), and the free end of the described first parasitic oscillator arms (716) has also laterally extended the second parasitic oscillator arms (717); Described second radiating element includes the trixenie oscillator arms (731) that a lower hypotenuse of the 4th radiation arm (715) from it extends obliquely, and the free end of described trixenie oscillator arms (731) has also laterally extended the 4th parasitic oscillator arms (732);

Being provided with rectangle parasitism oscillator unit (721) between said two radiating element, the limit, two, left and right of described rectangle parasitism oscillator unit (721) is zigzag, and the centre of described rectangle parasitism oscillator unit (721) is provided with multiple rectangular indentation (722) side by side;

Described first PCB substrate (71) back side is provided with two feed coupling apertures (742) corresponding with two the first oscillator arms respectively;

The separator (2) that described separator (2) is disc shaped, described separator (2) includes the second PCB substrate (8), and is located at the circular magnetic flow metering-orifice in the second PCB substrate (8), end face on described second PCB substrate (8) is additionally provided with laterally zygomorphic two isolation strip, each described isolation strip includes lateral isolation bar (81), the two ends of described lateral isolation bar (81) are provided with the first vertical isolation bar (82), extend from lateral isolation bar (81) between two the first vertical isolation bars (82) and have and the first vertical isolation bar (82) the second vertical isolation bar (83) in the same direction, described second vertical isolation bar (83) is shorter than the length of the first vertical isolation bar (82), extend from lateral isolation bar (81) in the middle of said two the second vertical isolation bar (83) and have and the first vertical isolation bar (82) the 3rd spacer bar in the same direction, described 3rd spacer bar is shorter than the length of the second vertical isolation bar (83).

2. a kind of implantable medical detector according to claim 1, it is characterized in that: described second radiation arm (713) is identical by the angular dimension at paracentral angle with the 3rd radiation arm (714) by the angle at paracentral angle, and be all higher than 15 �� and less than 60 ��.

3. a kind of implantable medical detector according to claim 1, it is characterised in that: set distance between rectangular indentation (722) as M; If the quantity of rectangular indentation (722) is N; If the second parasitic oscillator arms (717) is identical with the length of the 4th parasitic oscillator arms (732) and length is all set to K; Described K=M*0.25*N; The unit of described M and K is millimeter.

4. a kind of implantable medical detector according to claim 2, it is characterised in that: described second radiation arm (713) is 35 degree by the angle at paracentral angle.

5. a kind of implantable medical detector according to claim 1, it is characterized in that:, the edge of the end face of described first PCB substrate (71) is provided with a circle the first cage ring (711), and the edge of the bottom surface of the first PCB substrate (71) is provided with a circle the second cage ring (741).

6. a kind of implantable medical detector according to claim 3, it is characterised in that: concrete described M is 0.8mm; Described N is 48, and the length of described K is 9.6mm.