Sensor for monitoring fetal physiological signals

Abstract

The sensor comprises a signal electrode and a reference electrode which are used for collecting fetal ECG parameters, a light source and a detector which are used for collecting fetal PPG signals, a main support and a suction cup, the main support comprises a main cylinder and a sensor fixing frame, and the main cylinder is provided with a center through hole and a negative pressure air hole; the sensor fixing frames are connected with the main cylinder and located on the two sides of the center through hole, the signal electrode is inserted into the center through hole in a sleeved mode and located between the sensor fixing frames, the light source and the detector are arranged at the bottoms in the sensor fixing frames, and the negative pressure air hole is used for being externally connected with a negative pressure pipe. The suction cup comprises a suction cup front end and a suction cup rear end, the main cylinder is inserted into the suction cup rear end, and the reference electrode is in an annular shape, connected with the main support and exposed out of the suction cup rear end. According to the sensor for monitoring the fetal physiological signals, the fetal physiological signals are monitored in a non-invasive negative pressure adsorption fixing mode, and trauma and infection risks caused by monitoring the fetal physiological signals in a minimally invasive mode are avoided.

Description

Technical Field

[0001] This application relates to the field of medical devices, and particularly to a sensor for monitoring fetal physiological signals. Background Art

[0002] Currently, the detection of fetal heart rate and uterine contractions is divided into external detection and internal detection. External detection is severely affected by the external environment, and the collected signals are unstable, with possible intermittent signals, which may affect the diagnosis and cause misdiagnosis or delay in treatment.

[0003] Internal detection has higher accuracy compared to external detection. It is necessary to fix the fetal electrode on the fetal scalp for data measurement.

[0004] Existing products for monitoring physiological signals such as fetal electrocardiogram and maternal birth canal contractions use methods such as in vitro diagnosis and invasive or minimally invasive spiral electrode diagnosis in clinical applications, and their signal acquisition capabilities are relatively single, resulting in fewer effective physiological sign signals for doctors to refer to for diagnosis.

[0005] Moreover, invasive or minimally invasive fetal electrode products are prone to risks such as infection due to their invasiveness. Utility Model Content

[0006] This application provides a sensor for monitoring fetal physiological signals to solve the technical problem in the background art that invasive or minimally invasive fetal electrode products are prone to risks such as infection.

[0007] To solve the above technical problem, a technical solution adopted in this application is: providing a sensor for monitoring fetal physiological signals, the sensor for monitoring fetal physiological signals includes:

[0008] Signal electrodes and reference electrodes for collecting fetal ECG parameters;

[0009] A light source and a detector for collecting fetal PPG signals;

[0010] A main bracket, including a main cylinder and a sensor fixing bracket. The main cylinder is provided with a central through hole and a negative pressure air hole. The sensor fixing bracket is connected to the main cylinder and is located on both sides of the central through hole. The signal electrode is inserted into the central through hole and is located between the sensor fixing brackets. The light source and the detector are arranged at the bottom inside the sensor fixing bracket. The negative pressure air hole is used to connect to a negative pressure tube;

[0011] A suction cup, including a suction cup front end and a suction cup rear end. The main cylinder is inserted into the suction cup rear end. The reference electrode is annularly connected to the main bracket and is exposed outside the suction cup rear end.

[0012] Optionally, the signal electrode includes an electrode probe, a spring, a limit nut, and a spring pin. The electrode probe includes a main body portion and a screw portion connected to each other. The main body portion is disposed between the sensor fixing brackets. The screw portion sleeves the spring, passes through the central through hole, and is limited by the limit nut so that the signal electrode can elastically expand and contract in the axial direction relative to the main bracket.

[0013] Optionally, the main body portion is in the shape of a waist-shaped runway block and is provided with a plurality of ventilation holes at both ends. The ventilation holes correspond to the negative pressure air holes.

[0014] Optionally, the reference electrode is provided with a pressure guiding hole and a pressure guiding tube interface. The pressure guiding hole is disposed on the outer peripheral surface of the reference electrode. The pressure guiding tube interface communicates with the pressure guiding hole and protrudes from the first end surface of the reference electrode. The second end surface of the reference electrode is provided with a plurality of positioning holes. The main bracket is provided with a plurality of fixing columns. The plurality of fixing columns are inserted into the plurality of positioning holes in a matching manner.

[0015] Optionally, the cross section of the sensor fixing bracket is in a fan shape. The central angle of the sensor fixing bracket is aligned with and points to the central through hole and is in a clearance fit with the signal electrode.

[0016] Optionally, the groove body of the sensor fixing bracket is set to be light-shielding, and the bottom surface of the sensor fixing bracket is set to be light-transmitting and is recessed and inclined toward the direction of the central through hole.

[0017] Optionally, the sensor for monitoring fetal physiological signals further includes an IC fixing bracket. The IC fixing bracket is disposed within the sensor fixing bracket and is used to fix the light source and the detector at the bottom within the sensor fixing bracket.

[0018] Optionally, the sensor for monitoring fetal physiological signals further includes a pressure guiding tube. The pressure guiding tube is connected to the pressure guiding tube interface.

[0019] Optionally, the sensor for monitoring fetal physiological signals further includes a bracket cover. The spring pin is fixed to the bracket cover. The bracket cover is provided with a plurality of socket holes to be inserted into the plurality of fixing columns in a matching manner.

[0020] Optionally, the sensor for monitoring fetal physiological signals further includes secondary potting. The secondary potting is formed at one end of the reference electrode away from the suction cup.

[0021] The beneficial effects of the present application are as follows: The sensor for monitoring fetal physiological signals in the present application uses a non-invasive negative pressure adsorption fixing method to monitor fetal physiological signals, avoiding the trauma and infection risks brought by using a minimally invasive method to monitor fetal physiological signals, and can simultaneously collect ECG parameters, PPG, and intrauterine pressure. A variety of real-time monitoring data is conducive to doctors' comprehensive judgment of the condition and accurate and timely intervention and decision-making for patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0023] Figure 1 are the side view and three-dimensional structure schematic diagrams of the sensor for monitoring fetal physiological signals provided by the embodiments of the application;

[0024] Figure 2 is the exploded structure schematic diagram of the sensor for monitoring fetal physiological signals provided by the embodiments of the application;

[0025] Figure 3 is the cross-sectional structure schematic diagram of the sensor for monitoring fetal physiological signals provided by the embodiments of the application;

[0026] Figure 4 is the cross-sectional structure schematic diagram of the sensor for monitoring fetal physiological signals provided by the embodiments of the application;

[0027] Figure 5 is the cross-sectional structure schematic diagram of the sensor for monitoring fetal physiological signals provided by the embodiments of the application;

[0028] Figure 6 is the three-dimensional structure schematic diagram of the main bracket of the sensor for monitoring fetal physiological signals provided by the embodiments of the application;

[0029] Figure 7 is the three-dimensional structure schematic diagram of the signal electrode of the sensor for monitoring fetal physiological signals provided by the embodiments of the application.

[0030] Description of the reference numerals:

[0031] 10. Signal electrode; 20. Reference electrode; 30. Light source; 40. Detector; 50. Main bracket; 60. Suction cup; 101. Electrode probe; 102. Spring; 103. Limit nut; 104. Spring pin; 105. Main body; 106. Screw part; 107. Jack; 108. Vent hole; 201. Pressure guiding hole; 202. Pressure guiding pipe interface; 501. Sensor fixing bracket; 502. Fixed column; 503. Negative pressure air hole; 504. IC fixing bracket; 505. Bracket cover; 506. End face; 511. Main cylinder; 512. Central through hole; 601. Front end of suction cup; 602. Rear end of suction cup; 701. Pressure guiding pipe; 702. Negative pressure pipe. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0033] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present application, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0035] Please refer to Figures 1 to 7 , the present application provides a sensor for monitoring fetal physiological signals. The sensor for monitoring fetal physiological signals includes a signal electrode 10, a reference electrode 20, a light source 30, a detector 40, a main bracket 50, a suction cup 60, a pipeline 70, a secondary glue injection 80, etc.

[0036] After being powered on, the signal electrode 10 and the reference electrode 20 are used to cooperate to collect signals of fetal ECG (electrocardiogram) parameters.

[0037] The light source 30 and the detector 40 are used to cooperate to collect fetal PPG (PhotoPlethysmoGraphy) signals after being powered on. Among them, the light source 30 is used to emit infrared light, and the detector 40 is used as a detector to correspondingly receive the reflected light signal of the infrared light, and then is used to monitor the pulse and blood oxygen of the fetus.

[0038] The main bracket 50 can be integrally formed by plastic materials. The main bracket 50 includes a main cylinder body 511 and two sensor fixing brackets 501. The main cylinder body 511 is provided with a central through hole 512 and two negative pressure air holes 503. The two negative pressure air holes 503 are located on both sides of the central through hole 512 and are arranged in a straight line with the central through hole 512. The two sensor fixing brackets 501 are arranged on both sides of the straight line formed by the central through hole 512 and the two negative pressure air holes 503. The sensor fixing brackets 501 are connected to the main cylinder body 511 and are located on both sides of the central through hole 512 and the negative pressure air holes 503. The signal electrode 10 is inserted into the central through hole 512 and is located between the two sensor fixing brackets 501. The light source 30 and the detector 40 are arranged at the bottom inside the sensor fixing brackets 501. The negative pressure air holes 503 are used to externally connect a negative pressure tube 702 to construct a negative pressure adsorption force.

[0039] The suction cup 60 can be integrally formed by plastic materials. The suction cup 60 includes a suction cup front end 601 with a relatively large diameter and a suction cup rear end 602 with a relatively small diameter. The main cylinder body 511 is inserted into the suction cup rear end 602 in a matching manner. The reference electrode 20 is annularly connected to the main bracket 50 and is exposed outside the suction cup rear end 602. The outer peripheral wall of the reference electrode 20 can be arc-shaped, that is, the diameters at both ends of the reference electrode 20 are equivalent to the diameter of the suction cup rear end 602, and the diameter in the middle of the reference electrode 20 is slightly larger than the diameters at both ends of the reference electrode 20.

[0040] The signal electrode 10 includes an electrode probe 101, a spring 102, a limit nut 103, and a spring needle 104. The electrode probe 101 includes a main body part 105 and a screw part 106 that are connected. The main body part 105 is arranged between the two sensor fixing brackets 501. The screw part 106 is sleeved with the spring 102 and passes through the central through hole 512 and is limited on the other side of the main bracket 50 by the limit nut 103 so that the signal electrode 10 can elastically expand and contract in the axial direction relative to the main bracket 50. A jack 107 is provided at the free end of the screw part 106, and the jack 107 is used to receive the spring needle 104 to insert and form an electrical connection.

[0041] The main body part 105 can be in the shape of a runway block with a waisted middle and is provided with a plurality of ventilation holes 108 at both ends, and the ventilation holes 108 correspond to the negative pressure air holes 503.

[0042] The reference electrode 20 is provided with a pressure guiding hole 201 and a pressure guiding tube interface 202. The pressure guiding hole 201 is arranged on the outer peripheral surface of the reference electrode 20. The pressure guiding tube interface 202 is communicated with the pressure guiding hole 201 and protrudes from the first end face of the reference electrode 20. The second end face of the reference electrode 20 is provided with a plurality of positioning holes, and the main bracket 50 is provided with a plurality of fixing columns 502. The plurality of fixing columns 502 are inserted into the plurality of positioning holes in a matching manner.

[0043] The cross section of the sensor fixing bracket 501 is generally in a fan shape. The central angles of the two sensor fixing brackets 501 are aligned and point to the central through hole 512 and are in a clearance fit with the signal electrode 10 to avoid affecting the telescopic movement of the signal electrode 10.

[0044] The groove body of the sensor fixing bracket 501 is set to be light-shielding, and the bottom surface 506 of the sensor fixing bracket 501 is set to be light-transmitting and is slightly recessed and inclined towards the direction of the central through hole 512, so that the bottom surface of the sensor fixing bracket 501 and the end face where the light source 30 and the detector 40 are attached form an included angle for the detector 40 to better obtain signals.

[0045] The sensor for monitoring fetal physiological signals further includes an IC fixing bracket 504. The IC fixing bracket 504 is arranged inside the sensor fixing bracket 501. The IC fixing bracket 504 is used to fix the light source 30 and the detector 40 at the bottom inside the sensor fixing bracket 501.

[0046] The sensor for monitoring fetal physiological signals further includes a pressure guiding tube 701. The pressure guiding tube 701 is connected to the pressure guiding tube interface 202 and is used to cooperate in detecting the intrauterine pressure of the parturient.

[0047] The sensor for monitoring fetal physiological signals further includes a bracket cover 505. The spring needle 104 is fixed to the bracket cover 505. The bracket cover 505 is provided with a plurality of socket holes to be inserted into the plurality of fixing columns 502 in a matching manner to cover and connect to the open end of the main cylinder body 511 of the main bracket 50.

[0048] The sensor for monitoring fetal physiological signals further includes a secondary glue injection 80. The secondary glue injection 80 is formed at one end of the reference electrode 20 away from the suction cup 60. The pipeline 70 includes a pipe body and a wire. The pipe body is the pressure guiding tube 701 and the negative pressure tube 702, and the wire is the wire connecting the signal electrode 10 and the reference electrode 20 and the wire connecting the light source 30 and the detector 40. The secondary glue injection 80 fixes the pipeline 70 on the outer side of the bracket cover 505.

[0049] When assembling the sensor for monitoring fetal physiological signals provided by the present application:

[0050] First, assemble the signal electrode 10 with the main bracket 50. Install the spring 102 onto the screw part 106 of the electrode probe 101, then insert it into the central through-hole 512 of the main bracket 50, and fix it with a limit nut 103 that matches the thread at the top of the screw part 106 of the electrode probe 101. Then, insert the spring pin 104 formed on the bracket cover 505 into the jack 107 at the top of the screw part 106 of the electrode probe 101. The hole position of the bracket cover 505 is assembled in cooperation with the fixing post 502 at the top of the main bracket 50, thus forming an integral signal electrode 10 that can move freely longitudinally, as Figure 2 and Figure 3 shown.

[0051] Then, install the light source 30 and the detector 40 modules into two sensor fixing brackets 501 respectively, and fix the IC module at the bottom with the IC fixing bracket 504, so that the module is closely attached to the end face 506 of the sensor fixing bracket 501 of the main bracket 50, as Figure 3 shown.

[0052] Next, hermetically assemble the rear end 602 of the suction cup with the main bracket 50; then assemble the reference electrode 20 with the main bracket 50, connect the internal pressure guiding tube 701 with the internal pressure guiding tube interface 202 of the reference electrode 20, and connect the internal negative pressure tube 702 with the negative pressure hole 503 at the bottom of the main bracket 50 to form a complete negative pressure pipeline and an intrauterine pressure monitoring pipeline, as Figure 4 and Figure 5 shown.

[0053] Finally, form all the pipelines 70 into a complete product form through secondary injection molding 80 as Figure 1 shown.

[0054] In summary, it is easy for those skilled in the art to understand that the sensor for monitoring fetal physiological signals provided by this application uses a non-invasive negative pressure adsorption fixing method to monitor fetal physiological signals, avoiding the trauma and infection risks brought by using a minimally invasive method to monitor fetal physiological signals, and can simultaneously collect ECG parameters, PPG, and intrauterine pressure. Multiple real-time monitoring data is conducive to doctors' comprehensive judgment of the condition and accurate and timely intervention and decision-making for patients.

[0055] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. For those skilled in the art, without departing from the principle and spirit of this application, various equivalent replacements, modifications, and deformations can be made to the above embodiments. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A sensor for monitoring fetal physiological signals, characterized in that: The sensor for monitoring fetal physiological signals includes: A signal electrode (10) and a reference electrode (20) for collecting fetal ECG parameters; A light source (30) and a detector (40) for collecting fetal PPG signals; A main support (50) comprises a main cylinder (511) and a sensor fixing frame (501), wherein the main cylinder (511) is provided with a central through hole (512) and a negative pressure air hole (503), the sensor fixing frame (501) is connected to the main cylinder (511) and is located on both sides of the central through hole (512), the signal electrode (10) is inserted into the central through hole (512), the light source (30) and the detector (40) are arranged at the bottom of the sensor fixing frame (501), and the negative pressure air hole (503) is used for externally connecting a negative pressure tube (702); The suction cup (60) comprises a suction cup front end (601) and a suction cup rear end (602), the main cylinder (511) being inserted into the suction cup rear end (602), and the reference electrode (20) being connected to the main support (50) and exposed at the suction cup rear end (602).

2. The sensor for monitoring fetal physiological signals according to claim 1, characterized in that: The signal electrode (10) comprises an electrode probe (101), a spring (102), a limiting nut (103), and a spring pin (104); the electrode probe (101) comprises a main body (105) and a screw rod (106) connected to each other; the main body (105) is arranged between the sensor fixing frames (501); the screw rod (106) is sleeved with the spring (102), passes through the central through hole (512), and is then limited by the limiting nut (103) so that the signal electrode (10) can elastically expand and contract in an axial direction relative to the main support (50).

3. The sensor for monitoring fetal physiological signals according to claim 2, characterized in that: The main body (105) is provided with an air hole, and the air hole (108) corresponds to the negative pressure air hole (503).

4. The sensor for monitoring fetal physiological signals according to claim 2, characterized in that: The reference electrode (20) is provided with a pressure-conducting hole (201) and a pressure-conducting tube interface (202); the pressure-conducting hole (201) is arranged on the outer peripheral surface of the reference electrode (20); the pressure-conducting tube interface (202) is connected to the pressure-conducting hole (201) and protrudes from the first end face of the reference electrode (20); the second end face of the reference electrode (20) is provided with a plurality of positioning holes; the main bracket (50) is provided with a plurality of fixing columns (502); the plurality of fixing columns (502) are matched and plugged with the plurality of positioning holes.

5. The sensor for monitoring fetal physiological signals according to claim 1, characterized in that: The sensor fixing frame (501) and the signal electrode (10) are clearance-matched.

6. The sensor for monitoring fetal physiological signals according to claim 1, characterized in that: The groove body of the sensor fixing frame (501) is configured to shield light, and the bottom surface of the sensor fixing frame (501) is configured to be light-transmissive and to form an angle with the end surfaces that are in contact with the light source (30) and the detector (40).

7. The sensor for monitoring fetal physiological signals according to claim 1, characterized in that: The sensor for monitoring fetal physiological signals further comprises an IC fixing frame (504), wherein the IC fixing frame (504) is arranged in the sensor fixing frame (501) and is used to fix the light source (30) and the detector (40) at the bottom of the sensor fixing frame (501).

8. The sensor for monitoring fetal physiological signals according to claim 4, characterized in that: The sensor for monitoring fetal physiological signals further comprises a pressure-conducting tube (701), and the pressure-conducting tube (701) is connected to the pressure-conducting tube interface (202).

9. The sensor for monitoring fetal physiological signals according to claim 4, characterized in that: The sensor for monitoring fetal physiological signals further comprises a support cover (505), the spring pin (104) is fixed to the support cover (505), and the support cover (505) is provided with a plurality of socket holes for matching with the plurality of fixing columns (502).

10. The sensor for monitoring fetal physiological signals according to claim 1, characterized in that: The sensor for monitoring fetal physiological signals further comprises a secondary glue injection (80), wherein the secondary glue injection (80) is formed at an end of the reference electrode (20) away from the suction cup (60).

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