An electrocardiogram device and a usage method

Abstract

The present invention relates to an electrocardiogram device and a method of use. The device includes a spraying member, which includes: a spraying column having a spraying surface, a plurality of through holes on the spraying surface, and a first central hole provided with an engaging structure; a fixing plate having a second central hole corresponding to the first central hole, wherein the first central hole and / or the second central hole serve as channels to receive a fluid so as to guide the fluid to the spraying surface and enter the suction cup through the plurality of through holes; and a buckle column which is placed into the suction cup and forms an engaging connection structure with the first central hole through the second central hole. Based on the traditional suction cup, the present invention designs a spraying member for disinfecting the inside of the suction cup, which does not affect the normal use of the suction cup and can help the rapid progress of electrocardiogram detection.

Description

Technical Field

[0001] The present invention relates to the technical field of electrocardiographs, and in particular to an electrocardiogram device and a usage method thereof. Background Art

[0002] When existing electrocardiographs and electrophysiological examination instruments perform detections, electrode balls or electrode clips are generally used to decorate the detected parts of patients. The electrode balls have some defects. For example, in clinical rescue, long-term electrocardiogram observation is required, and the ball cups often cannot be suctioned firmly; there are many patients who need to have electrocardiograms done in medical institutions every day, and repeated use of electrode balls is likely to cause cross-infection, especially for patients in the infectious disease department and electrocardiogram examinees in epidemic areas. To overcome these defects, the applicant designs an electrocardiogram device and a usage method, including a spraying component for disinfecting the inside of the suction bowl, an adsorption component for adsorbing the patient's skin, and an optimized electrode column. The spraying component will not affect the normal use of the suction bowl, and can help with the cleaning, disinfection, and rapid progress of electrocardiogram detection.

[0003] Chinese Patent CN108158575B discloses a conductive liquid self-coating electrocardiogram chest lead connector, belonging to the field of electrocardiograph instrument components, including an electrode cup, a negative pressure bladder, a ring groove cylinder, a hand pressure cylinder, and a liquid outlet hole. Electromagnets and permanent magnet rows are respectively arranged at the bottom of the hand pressure cylinder and on the inner and outer side walls of the ring groove cylinder. The permanent magnet rows are a column of permanent magnets with gradually increasing magnetism arranged at equal intervals, and the magnetism of the permanent magnets is opposite to that of the electromagnets; above the liquid outlet hole, there are two sealing plates with their adjacent ends mutually staggered and adapted, and electromagnets two are arranged at the adjacent ends of the sealing plates. A permanent magnet two with magnetism opposite to that of the electromagnet two is arranged inside the side wall of the ring groove cylinder, and an arc-shaped spring column is connected between the sealing plate and the bottom of the permanent magnet ring groove. This patent can realize the automatic control of the hand pressure cylinder, ensure the positive downward pressure of the hand pressure cylinder, maintain a constant change in the applied force, achieve the purpose of evenly coating the conductive liquid, and avoid affecting the fixing stability of the connector relative to the human body; ensure the accurate control of the inflow and outflow of the conductive liquid, and avoid waste of the conductive liquid. The defect of this patent is that although the outflow speed of the conductive liquid remains constant, the coating range is too small to greatly reduce the skin impedance of patients, and the practicality is low. By applying the conductive liquid by medical staff themselves, not too much conductive liquid will be wasted, and the time required for manual operation is shorter.

[0004] In addition, on the one hand, there are differences in the understanding of those skilled in the art; on the other hand, although the inventor studied a large number of documents and patents when making this invention, all details and contents are not listed in detail due to space limitations. However, this does not mean that the present invention does not possess the features of these prior arts. On the contrary, the present invention already possesses all the features of the prior arts, and the applicant reserves the right to add relevant prior arts in the background art. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the technical solution of the present invention is to provide an electrocardiogram device, including a suction bowl, a suction ball and a lead wire, and further including: a spraying member, the spraying member includes: a spraying column, which has a spraying surface, a plurality of through holes on the spraying surface and a first central hole provided with an engaging structure; a fixing plate, which has a second central hole corresponding to the first central hole, wherein the first central hole and / or the second central hole serve as channels to receive fluid, so as to guide the fluid to the spraying surface and enter the suction bowl through the plurality of through holes; and a buckle column, which is placed into the suction bowl and forms an engaging connection structure with the first central hole through the second central hole. Preferably, the three-dimensional structure of the suction bowl will affect the detection accuracy of the electrocardiogram. For example, a curved contour without sharp parts can prevent sudden changes in the electric field or current from the skin contact to the lead wire when the suction bowl contacts the patient's skin. In this regard, on the basis of the traditional suction bowl, the present invention designs a spraying member for disinfecting the inside of the suction bowl, which will not affect the normal use of the suction bowl and can help the rapid progress of electrocardiogram detection.

[0006] According to a preferred embodiment, the buckle column is configured to be snapped into and engaged with the spraying column. The buckle column is provided with a column, the size of the column can pass through the second central hole of the fixing plate, and the flange part of the buckle column cannot pass through the second central hole of the fixing plate. The spraying column and the buckle column are configured to be fixed on opposite sides of the fixing plate when the column of the buckle column enters through the second central hole of the fixing plate and engages with the first central hole of the spraying column.

[0007] According to a preferred embodiment, the plurality of through holes on the spraying surface are used to balance the fluid pressure so that it can be evenly sprayed into the suction bowl. Along the direction of fluid movement, the apertures of the plurality of through holes increase in sequence, so that the fluid flow rate flowing out of each through hole is the same. The above setting of the through holes can make the disinfectant spray comprehensively and with high uniformity. Since the fluid flows from the first central hole to the spraying surface, at a position far from the first central hole, the fluid pressure gradually decreases. If the apertures of the plurality of through holes are the same, the through holes closer to the first central hole have a greater water pressure, and more fluid is sprayed out from the through holes closer to the first central hole. As the fluid flows, the water pressure gradually decreases, and the least fluid is sprayed out from the through holes far from the first central hole. Therefore, the plurality of through holes are set with different apertures along the fluid flow direction, the aperture of the through hole closest to the first central hole is the smallest, and the aperture of the through hole farthest from the first central hole is the largest, so as to achieve the effect of uniform spraying.

[0008] According to a preferred embodiment, the device further includes: an adsorption member, the adsorption member includes: at least one contour limiting structure, which is connected to the fixed disk and extends from the fixed disk towards the spraying column; an adsorption surface, which is connected to the contour limiting structure and forms a suction cup-like structure covering the spraying column. In the prior art, due to the combination of the suction cup and the suction ball used, a relatively large force needs to be applied to the patient's skin to fix it. For the patient, this method will cause greater discomfort due to the relatively large suction force on the skin. Therefore, on this basis, this embodiment modifies the suction force problem and conducts an adaptive design with the spraying member, so that it can be cleaned and / or disinfected and / or moistened and / or conductive substances can be added between each use during electrocardiogram detection. While accelerating the electrocardiogram detection process, the patient will not feel uncomfortable.

[0009] According to a preferred embodiment, a plurality of the contour limiting structures are used to maintain the suction force of the adsorption surface and the accuracy of electrocardiogram detection; under the support of the plurality of contour limiting structures, the adsorption surface is divided into at least two fan-shaped surfaces. By exhausting the air in the adsorption surface, the at least two fan-shaped surfaces contract inward to form a negative pressure state. The contour limiting structure serves as an electrode member and a structural support member to fix the adsorption surface, so that only the fan-shaped part of the adsorption surface is deformable, while other parts are not deformable and can maintain their shapes. The fan-shaped part of the adsorption surface is flexible and deformable. The user presses the fan-shaped part of the adsorption surface to deform it and release the internal air to attach it to the user's skin.

[0010] According to a preferred embodiment, the adsorption member may further be provided with a valve for reducing the pressure of the adsorption surface. The valve is connected to at least one of the contour limiting structures and is connected to the lead wire. When the user squeezes and deforms the adsorption surface, the valve can be used to exhaust the air therein and lock the negative pressure state, so that the adsorption member is closely attached to the patient's skin.

[0011] According to a preferred embodiment, the device further includes: a data unit and a control unit. The data unit is used to obtain the information of the electrocardiogram device currently in use and the status information of the patient. The control unit is configured to be able to determine a flow signal related to the fluid flow when cleaning and disinfection is required based on the device information and status information sent by the data unit; the control unit can also determine a pressure signal related to the fluid pressure when cleaning and disinfection is required based on the device information and status information sent by the data unit; the control unit is further configured to: regulate a pressure component related to the flow signal based on the generation of the pressure signal. Specifically, for rapid cleaning and disinfection of the electrocardiogram device, the control unit sends a flow signal to the pressure component to adjust it to a working mode with an appropriate flow rate. In this mode, the pressure component sprays a quantitative amount of disinfectant or gel, and its flow rate is the first flow rate, and this flow rate is at least less than the second flow rate in the working mode controlled by the pressure signal. Preferably, the first flow rate is smaller than the second flow rate because it is controlled to only meet the quantitative venom or gel for rapid disinfection of the electrocardiogram device. The second flow rate is relatively large because when used for a larger electrocardiogram device, for example, in the comparison between the suction bowl used by adults and the suction bowl used by infants, a larger electrocardiogram device requires a greater pressure to thoroughly clean and disinfect its interior. However, in the working mode with a smaller flow rate, the disinfectant or gel cannot be sprayed to the outer edge of the electrocardiogram device through the spraying column, resulting in the electrocardiogram device not being thoroughly cleaned and disinfected or the patient's skin not being moistened for conduction. At this time, based on the judgment of the electrocardiogram device information and the patient's status information, the pressure component needs to increase the pressure to increase the flow rate so that the fluid sprayed from the spraying column can cover the electrocardiogram device. That is, the flow signal controls the flow rate of the sprayed fluid, and the pressure signal controls the flow velocity of the sprayed fluid.

[0012] The present invention relates to a method of using an electrocardiogram device, a spraying member, and the spraying member includes: a spraying column having a spraying surface, a plurality of through holes on the spraying surface, and a first central hole provided with an engaging structure; a fixing disk having a second central hole corresponding to the first central hole, wherein the first central hole and / or the second central hole serve as channels to receive fluid so as to guide the fluid to the spraying surface and enter the suction bowl through the plurality of through holes; and a buckle column which is placed into the suction bowl and forms an engaging connection structure with the first central hole through the second central hole.

[0013] According to a preferred embodiment, an adsorption member, the adsorption member includes: at least one contour limiting structure connected to the fixing disk and extending from the fixing disk towards the spraying column; an adsorption surface connected to the contour limiting structure and forming a suction cup-like structure covering the spraying column.

[0014] According to a preferred embodiment, there is a data unit and a control unit. The data unit is used to obtain information about the currently used electrocardiogram device and the status information of the patient. The control unit is configured to be able to generate a flow signal related to the fluid flow when it is determined that cleaning and disinfection are required based on the device information and status information sent by the data unit; the control unit can also generate a pressure signal related to the fluid pressure when it is determined that cleaning and disinfection are required based on the device information and status information sent by the data unit; the control unit is further configured to: regulate a pressure component related to the flow signal based on the generation of the pressure signal.

[0015] Advantageous technical effects of the present invention:

[0016] (1) The three-dimensional structure of the suction cup will affect the detection accuracy of the electrocardiogram. For example, a curved profile without sharp parts can prevent sudden changes in the electric field or current from the skin contact to the lead wire when the suction cup contacts the patient's skin. In this regard, based on the traditional suction cup, the present invention designs a spraying component for disinfecting the inside of the suction cup, which does not affect the normal use of the suction cup and can help the rapid progress of electrocardiogram detection;

[0017] (2) The setting of the through holes can make the disinfectant spray comprehensively and with high uniformity. Since the fluid flows from the first central hole to the spraying surface, at positions far from the first central hole, the pressure of the fluid gradually decreases. If the apertures of several through holes are the same, the through holes closer to the first central hole have a greater water pressure, and more fluid is sprayed out from the through holes closer to the first central hole. As the fluid flows, the water pressure gradually decreases, and the least fluid is sprayed out from the through holes far from the first central hole. Therefore, the apertures of several through holes are set to be different along the fluid flow direction, with the aperture of the through hole closest to the first central hole being the smallest and the aperture of the through hole farthest from the first central hole being the largest, so as to achieve the effect of uniform spraying;

[0018] (3) In the prior art, due to the combination of the suction cup and the suction ball used, a relatively large force needs to be applied to the patient's skin to fix it. For the patient, this method will cause greater discomfort due to the relatively large suction force on the skin. Therefore, in this embodiment, based on this, the suction force problem is modified and adaptively designed with the spraying component, so that cleaning and / or disinfection and / or wetting and / or addition of conductive substances are carried out between each use in electrocardiogram detection. While accelerating the electrocardiogram detection process, the patient will not feel discomfort;

[0019] (4) The contour limiting structure serves as an electrode component and a structural support component to fix the adsorption surface, so that only the fan-shaped part of the adsorption surface can be deformed, while other parts cannot be deformed and can maintain their shapes. The fan-shaped part of the adsorption surface is flexible and deformable. The user presses the fan-shaped part of the adsorption surface to deform it and release the internal air to attach it to the user's skin. Brief Description of the Drawings

[0020] Figure 1 FIG. is a schematic structural diagram of a preferred embodiment of a cleaning device for an electrocardiograph of the present invention;

[0021] Figure 2 FIG. is a schematic structural diagram of a preferred embodiment of the spraying member for the suction bowl of the present invention;

[0022] Figure 3 FIG. is a schematic structural diagram of a preferred embodiment of the adsorption member of the present invention;

[0023] Figure 4 FIG. is a schematic structural diagram of a preferred embodiment of the spraying member for the adsorption member of the present invention;

[0024] Figure 5 FIG. is a front view of the adsorption surface of the present invention in a negative pressure state;

[0025] Figure 6 FIG. is a top view of the adsorption surface of the present invention in a negative pressure state;

[0026] Figure 7 FIG. is a cross-sectional schematic diagram of the contour limiting structure of the present invention;

[0027] Figure 8 FIG. is a cross-sectional view of the electrode post of the present invention;

[0028] Figure 9 FIG. is an axonometric view of the electrode post of the present invention.

[0029] List of Reference Numerals

[0030] 1: Spraying column; 2: Through hole; 3: First central hole; 4: Fixed disk; 5: Second central hole; 6: Clamping post; 7: Column; 8: Suction bowl; 9: Suction ball; 10: Contour limiting structure; 11: Adsorption surface; 12: Electrode post; 13: Electrode wire; 14: Valve; 15: Pressing spring; 16: O-ring 17: Umbrella-shaped part; 18: Air outlet; 19: Flexible part. Detailed Description of the Preferred Embodiments

[0031] The following is a detailed description with reference to the drawings.

[0032] Embodiment 1

[0033] The present application relates to an electrocardiogram device, comprising a spraying component, the spraying component comprising: a spraying column 1, which has a spraying surface, a plurality of through holes 2 on the spraying surface and a first central hole 3 provided with an engaging structure; a fixing plate 4, which has a second central hole 5 corresponding to the first central hole 3, wherein the first central hole 3 and / or the second central hole 5 are used as a channel to receive a fluid so as to guide the fluid to the spraying surface and enter the suction cup 8 through the plurality of through holes 2; and a buckle column 6, which is placed in the suction cup 8 and forms an engaging connection structure with the first central hole 3 through the second central hole 5. Preferably, the three-dimensional structure of the suction cup 8 will affect the detection accuracy of the electrocardiogram. For example, a curved contour without a sharp part can prevent the suction cup 8 from generating a sudden change in the electric field or a current from the skin to the lead wire when it contacts the patient's skin. In this regard, the present invention designs a spraying component for disinfecting the inside of the suction cup 8 on the basis of the traditional suction cup 8, which will not affect the normal use of the suction cup 8 and can help the rapid conduction of the electrocardiogram detection. Specifically, the fixing plate 4 can be made of plastic material or polycarbonate plastic material or nylon plastic material or acrylonitrile butadiene styrene or metal or aluminum-containing metal or die-cast metal or extruded metal. The fixing plate 4 can be set to a circular shape, and the second center hole 5 is a perforation at the center of the circle. Preferably, the clip column 6 is configured to snap into and engage the spray column 1. The clip column 6 is provided with a column 7, the column 7 is sized to pass through the second center hole 5 of the fixing plate 4, and the flange portion of the clip column 6 cannot pass through the second center hole 5 of the fixing plate 4. The first center hole 3 of the spray column 1 has a certain thickness, which is configured to receive the column 7 of the clip column 6, and the flange portion of the spray column 1 cannot pass through the second center hole 5 of the fixing plate 4. Preferably, the spray column 1 and the clip column 6 are configured to be fixed on opposite sides of the fixing plate 4 when the column 7 of the clip column 6 enters from the second center hole 5 of the fixing plate 4 and engages with the first center hole 3 of the spray column 1. The clip column 6 is connected to a conduit for conveying fluid, which is parallel to the lead wire. The conduit can deliver the fluid to the column 7 and enter the spraying surface through the second central hole 5 and the first central hole 3. Preferably, the spraying column 1 and the clip column 6 can be made of conductive and non-corrosive materials or stainless steel.

[0034] According to a preferred embodiment, the fluid received by the spraying column 1 includes a disinfectant substance, a conductive substance, or a wetting substance. Preferably, the disinfectant substance, such as a disinfectant solution, disinfects the inner wall and outer edge of the suction cup 8 through the spraying column 1. The conductive substance is, for example, a conductive paste or an electrode gel. The wetting substance is, for example, a gel, which can be a water-soluble hydrogel or a conductive hydrogel, and is used to moisten the skin to reduce skin impedance. The wetting substance can also be an adhesive with high viscosity to reduce the influence caused by patient movement. When the wetting substance is a hydrogel, its peel resistance is between 0.5 N and 5 N. Due to the conductive effect on the epidermal layer edema, the gel has an impedance of less than 150 kΩ at a frequency of 10 Hz and below. The gel has a conductance length between 3.6 and 313 pS / cm at a frequency of 1 Hz. The gel provides an effective electrode area between 1.75 and 2.75 cm². The impedance of the gel-to-gel connection measured between the electrodes is less than or equal to 31 <W>. The DC offset voltage of the electrodes connecting the gel to the gel after one minute of stabilization is less than or equal to 100 mV. Combining the offset instability and internal noise of the electrodes with the gel connection, after a one-minute stabilization period, it is measured for five minutes to be less than or equal to 150 pV under a passband of 0.15 to 100 Hz. The DC voltage offset of the electrodes, when the gel is connected to the gel after the end of the electrocardiogram detection, is less than or equal to 150 mV. Preferably, the wetting substance is a paste. In some embodiments, compared with the wet gel that may dry out during use, the paste provides better skin contact with the patient during long-term electrocardiogram detection. Preferably, the paste is water-soluble and conductive. Preferably, compared with the conductive gel discussed above, the paste has similar or even better conductivity properties. Compared with the gel, the paste can maintain better performance for a period of time because the paste is more viscous and loses water at a slower rate. Preferably, the paste can also be non-conductive and contains conductive carbon. Preferably, the paste has sufficient adhesiveness to reduce the influence caused by patient movement. Preferably, the paste can include one or more of the following components: cetyl polyoxyethylene ether, water, glycerol, calcium carbonate, 1,2-propanediol, potassium chloride, white gel, sodium chloride, sorbitan polyoxyethylene, methyl paraben, and propyl paraben. Preferably, due to the conductive effect on the patient's horny epidermal layer, the paste has an impedance of less than 150 1 <W> at a frequency of 10 Hz and below. Preferably, due to the conductive effect on the patient's horny epidermal layer, the paste has an impedance of less than 150 kΩ at a frequency between 0.05 Hz and 150 Hz. Preferably, the paste has a conductivity between 250 and 300 pS / cm at a frequency of 1 Hz. Preferably, the paste has a conductivity of 282 pS / cm at a frequency of 1 Hz. In some embodiments, the paste has an EEA between 4.5 and 6.5 cm².Preferably, the impedance measured between the electrode of the connection paste and the paste is less than or equal to 3 kΩ. Preferably, the DC offset voltage of the electrode connecting the paste to the paste after one minute of stabilization is less than or equal to 100 mV. Preferably, the instability and internal noise of the electrode are combined as the paste, and after a one-minute stabilization time, it is measured for five minutes with a passband of 0.15 to 100 Hz and is less than or equal to 150 pV. Preferably, the DC voltage offset of the electrode, after the end of the electrocardiogram detection, when connecting the paste to the paste, is less than or equal to 150 mV.

[0035] According to a preferred embodiment, a plurality of through holes 2 on the spraying surface are used to balance the fluid pressure so that it can be evenly sprayed into the suction bowl 8. Along the direction of fluid movement, the aperture diameters of the plurality of through holes 2 increase in sequence so that the fluid flow rates flowing out of each through hole 2 are the same. The above setting of the through holes 2 can enable the disinfected liquid to be sprayed comprehensively and with high uniformity. Since the fluid flows from the first central hole 3 to the spraying surface, at positions far from the first central hole 3, the fluid pressure gradually decreases. If the aperture diameters of the plurality of through holes 2 are the same, then the through holes 2 closer to the first central hole 3 have a greater water pressure, and more fluid is sprayed out from the through holes 2 closer to the first central hole 3. As the fluid flows, the water pressure gradually decreases, and the least fluid is sprayed out from the through holes 2 far from the first central hole 3. Therefore, the plurality of through holes 2 are set to have different aperture diameters along the fluid flow direction, with the aperture diameter of the through holes 2 closest to the first central hole 3 being the smallest and the aperture diameter of the through holes 2 farthest from the first central hole 3 being the largest, thereby achieving the effect of uniform spraying. Preferably, the plurality of through holes 2 are simultaneously distributed circumferentially on the spraying surface.

[0036] According to a preferred embodiment, the buckle post 6 is connected with a catheter. The catheter runs parallel to the lead wire outward and is connected to a pressure assembly for conveying fluid. The pressure assembly can adopt a negative pressure device. The pressure assembly is controlled by a control unit or manually controlled by medical staff.

[0037] Example 2

[0038] This embodiment is a further improvement of the above embodiment, and the repeated content will not be elaborated.

[0039] The above embodiment illustrates the method and principle of using this device for the suction bowl 8, suction ball 9 and lead wire of the prior art. However, due to the combination of the suction bowl 8 and suction ball 9 used in the prior art, a relatively large force needs to be applied to the patient's skin to fix them. For the patient, this method will bring greater discomfort due to the relatively large suction force generated on the skin. Therefore, on this basis, this embodiment improves the suction problem and conducts an adaptive design with the spraying component, so that it can be cleaned and / or disinfected and / or moistened and / or conductive substances can be added between each use during electrocardiogram detection. While accelerating the electrocardiogram detection process, the patient will not feel discomfort.

[0040] According to a preferred embodiment, the electrocardiograph cleaning device further includes: an adsorption member. The adsorption member includes: at least one contour limiting structure 10, which is connected to the fixed disk 4 and extends from the fixed disk 4 towards the spraying column 1; an adsorption surface 11, which is connected to the contour limiting structure 10 and forms a suction cup-like structure covering the spraying column 1. The cooperative setting of the adsorption member and the spraying member can be used for the rapid detection of the patient's electrocardiogram. Specifically, the spraying member can spray out a disinfectant to clean and disinfect the adsorption member, and clean and disinfect the contact part on the patient's skin surface. The spraying member then sprays out a coagulant on the patient and / or the adsorption member to reduce skin impedance and increase adsorption capacity. Under the condition of causing the minimum suction force on the patient's surface skin, it is attached by the suction force or negative pressure of the adsorption member. The adsorption member is connected to the fixed disk 4 through the adsorption surface 11. The adsorption surface 11 can be made of a rubber molding material. After use, the medical staff wipes off the residual gel on the patient and the adsorption member, and quickly cleans and disinfects the adsorption member through the spraying member for the next use.

[0041] According to a preferred embodiment, a plurality of contour limiting structures 10 can be provided to maintain the suction force of the suction surface 11 and the accuracy of electrocardiogram detection. Preferably, two contour limiting structures 10 are provided to support both sides of the suction surface 11. Preferably, at least three contour limiting structures 10 are provided along the semicircular contour of the suction surface 11 and divide the suction surface 11 into at least three sector structures. For example, the angles between the three contour limiting structures 10 are equal to support the suction surface 11. Under the support of several contour limiting structures 10, the suction surface 11 is divided into several sector structures. By exhausting the air inside the suction surface 11, the several sector structures contract inward to form a negative pressure state. The contour limiting structure 10 is made of a conductive polymer material. The contour limiting structure 10 is also used to contact the patient's skin for electrocardiogram detection. It should be noted that the gel sprayed by the spraying member can improve the conductivity of the contour limiting structure 10, and the sprayed disinfectant liquid is used for disinfection treatment. The suction surface 11 can be made of an electrically insulating material. The several sector edges of the suction surface 11 are flat to fit the patient's skin. Since the contour limiting structure 10 may have a certain rigidity, it will cause discomfort to the patient during the process of contacting the patient's skin. By injecting the gel through the spraying column 1 placed in the contour limiting structure 10, the discomfort of the patient can be avoided. It should be noted that the length of the spraying column 1 is shorter than the length of the contour limiting structure 10 to generate a gap to make the contour limiting structure 10 fit the patient's skin better. The contour limiting structure 10 serves as an electrode member and a structural support member to fix the suction surface 11, so that only the sector part of the suction surface 11 is deformable, while other parts are not deformable and can maintain their shapes. The sector part of the suction surface 11 is flexible and deformable. The user presses the sector part of the suction surface 11 to deform it and release the internal air to attach it to the user's skin.

[0042] Currently, the suction cup 8 used in the prior art often uses a metal material. However, the metal material has poor adsorption performance, is easy to fall off from the patient's skin, and cannot apply a comfortable adsorption force or the minimum force on the patient. The uncontrollable adsorption force on the patient will bring discomfort to the patient. In response to this, the prior art also proposes to make it of soft rubber. However, when in a negative pressure state, the soft rubber is prone to deform into an irregular shape. The irregular shape causes the negative pressure inside the suction cup 8 to be unevenly distributed, with a larger negative pressure in some positions and a smaller negative pressure in some positions. The irregular shape will further promote the imbalance of the negative pressure, making the negative pressure in the position with a larger negative pressure even larger and the negative pressure in the position with a smaller negative pressure even smaller. The irregular deformation of the suction cup also easily causes the edge of the bowl in contact with the skin to deform irregularly, resulting in poor contact between some edges with larger deformation and the skin, and even losing the negative pressure state and leaking air due to this deformation.

[0043] Specifically, as Figure 5 and Figure 6 shown,Figure 5 and Figure 6 When only the adsorption surface 11 is provided and it is in a negative pressure state, the deformation of the adsorption surface 11 causes the force application point of its gas pressure on the adsorption surface 11 to change, so that the adsorption force directions on both sides of the adsorption surface 11 change to increase the deformation of the adsorption surface 11, thereby losing the negative pressure state. When the internal air pressure of the adsorption surface 11 is less than the external atmospheric pressure, the adsorption surface 11 is adsorbed on the patient's skin. Similarly, under the action of this air pressure difference, due to the elasticity of the adsorption surface 11, it is easy to deflect and deform towards its own inner side, especially the end in contact with the patient's skin deforms to cause a gap, resulting in the loss of the negative pressure state. In addition, when the adsorption surface 11 is close to the patient's skin, the forces applied to the edge of the adsorption surface 11 are not necessarily the same, resulting in the adsorption surface 11 not maintaining its original semi-circular contour after attachment. Since it is no longer symmetrical, the asymmetrical contour will limit the force application points of the adsorption force, making it even more impossible for the adsorption force to be evenly distributed, further exacerbating the deformation of the adsorption surface 11, making it lose the negative pressure state. Based on the above defects, the present invention adds a contour limiting structure 10 to the adsorption surface 11 and improves the structure of the contour limiting structure 10.

[0044] As Figure 7 shown, the contour limiting structure 10 includes two symmetrically arranged curvature surfaces. The two curvature surfaces are connected by a smooth chamfer. The curvature surface presents a streamlined depression first, then a raised protrusion, and finally a smooth chamfer. This design is to form a streamlined depression of the adsorption surface 11 based on the negative pressure effect, and lift the adsorption surface 11 through the protrusion and the smooth chamfer, so that it will not be damaged due to repeated deformation and form a sharp structure. Figure 7 Only the shape of the cross-section of the contour limiting structure 10 is shown for illustration.

[0045] The cross-section of the contour limiting structure 10 is a symmetric structure as a whole. Figure 7The dashed line in the middle is the concave structure formed by the adsorption surface 11. The contour limiting structure 10 has a transverse symmetry line and a longitudinal symmetry line. The two curved surfaces of the contour limiting structure 10 in contact with the adsorption surface 11 are streamlined concave surfaces, and the depth of the depression should not be greater than one-third of the width of the contour limiting structure 10 to prevent damage to the adsorption surface 11 due to excessive deformation. When the depth of the depression approaches one-third of the width of the contour limiting structure 10, the generated adsorption force is sufficient to attach the adsorption surface 11 to the patient's skin. The included angle formed by the tangents of the two curved surfaces is not less than ninety degrees. The curved surfaces are streamlined, and the lowest point of the curved surface does not exceed one-third of the width of the contour limiting structure 10. The connection between the curved surface and the rest of the surface is a circular arc transition. The present invention has various advantages in setting the two side surfaces of the contour limiting structure 10 in contact with the adsorption surface 11 as curved surfaces. When the curved surface contacts the adsorption surface 11, since the curved surface is a symmetric structure, the pressure borne can be evenly dispersed to both sides, and no irregular deformation will occur. When the adsorption surface 11 bears pressure, it can perform symmetric deformation of different degrees centered on the longitudinal symmetry line based on the extrusion of the air pressure difference, so that the cross-sectional shape of the adsorption surface 11 will not show irregular deformation with one end large and the other end small.

[0046] Specifically, since both of the two curved surfaces are symmetric arc surfaces. When the adsorption surface 11 is subjected to an air pressure difference, the air pressure difference exerts force on the adsorption surface 11 from different directions based on the radian, that is, the curved surface limits the force application direction of the air pressure difference, making the pressure on both sides of the adsorption surface 11 balanced, so that the air pressure difference will not squeeze the adsorption surface 11 irregularly. When the adsorption surface 11 undergoes symmetric deformation based on different pressures, the adsorption surface 11 squeezes the curved surface, making the contact surface between the adsorption surface 11 and the corresponding curved surface larger, thus preventing the imbalance of the negative pressure state.

[0047] Through the streamlined contour of the present invention, the part without the contour limiting structure 10 forms a streamlined depression under the action of negative pressure, so that the negative pressure borne by each streamlined depression structure of the adsorption surface 11 is approximate, avoiding the irregular deformation of the adsorption surface 11 due to the negative pressure. The streamlined depression exerts less pressure on the main body of the adsorption surface 11 and will not form a sharp structure, so it is not easy to cause damage to the main body of the adsorption surface 11 due to the pressure of the contour limiting structure 10 or shorten the service life due to severe deformation.

[0048] According to a preferred embodiment, the adsorption surface 11 extends outwardly with a multi-level structure for maintaining suction. This multi-level structure shows a gradient coverage, and when pressing the adsorption surface 11, the suction can be enhanced by the contraction of the level at the vertical bottom layer.

[0049] According to a preferred embodiment, the adsorption member may further be provided with a valve for reducing the pressure on the adsorption surface 11. The valve may be connected to at least one contour limiting structure 10 and to the lead wire. The valve is made of a conductive material. When the user squeezes and deforms the adsorption surface 11, the valve can be used to discharge the air therein and lock the negative pressure state, so that the adsorption member fits closely to the patient's skin. Under normal circumstances, the valve remains closed to maintain this state.

[0050] Embodiment 3

[0051] This embodiment is a further improvement of the above embodiment, and repeated content will not be elaborated.

[0052] According to a preferred embodiment, the spraying member of the present invention can also be used for cleaning or disinfecting the electrode clip. The spraying member is arranged on the shaft portion of the electrode clip, and the electrode clip is cleaned or disinfected through the shaft portion. Preferably, since different electrocardiogram devices require different flow rates of disinfectant solution, the spraying member needs to adjust the amount of disinfectant solution sprayed. For the rapid detection of electrocardiograms, the main purpose is to quickly clean and disinfect the used electrocardiogram device on the premise of completing the electrocardiogram detection of the patient. For example, after the electrocardiogram detection of the previous patient is completed, disinfectant solution is sprayed for disinfection, and gel is sprayed for conduction when in use. If the flow rate of the sprayed fluid is not controlled, a large amount of residual fluid will adhere to the electrocardiogram device, and even an excessive flow rate will cause the disinfectant solution or gel to spray out from the spraying member and splash to the outside, which may instead cause the splashing of pollutants and bring interference to medical staff, and it is also difficult to take targeted measures.

[0053] Therefore, the present invention provides a preferred embodiment, which further includes a data unit and a control unit. The data unit is used to obtain the information of the electrocardiogram device currently in use and the status information of the patient. The control unit is configured to be able to determine a flow signal related to the fluid flow when cleaning and disinfection is required based on the device information and status information sent by the data unit. The control unit switches the working state of the pressure component based on the received flow signal. The buckle column 6 is connected with a catheter. The catheter runs parallel to the lead wire outward and is connected to a pressure component for conveying fluid. The pressure component can adopt a negative pressure device. The pressure component is controlled by the control unit or manually controlled by medical staff. The pressure component is electrically connected to the control unit. The pressure component further includes a pressure sensor for detecting the pressure inside the adsorption surface 11, and the pressure sensor is arranged at the catheter. Preferably, the control unit can also determine a pressure signal related to the fluid pressure when cleaning and disinfection is required based on the device information and status information sent by the data unit. The control unit is further configured to regulate the pressure component related to the flow signal based on the generation of the pressure signal. Specifically, for rapid cleaning and disinfection of the electrocardiogram device, the control unit sends a flow signal to the pressure component to adjust it to a working mode with an appropriate flow rate. In this mode, the pressure component sprays a quantitative amount of disinfectant or gel, and its flow rate is the first flow rate, and this flow rate is at least less than the second flow rate in the working mode controlled by the pressure signal. Preferably, the first flow rate is smaller than the second flow rate because it is controlled to only meet the quantitative venom or gel for rapid disinfection of the electrocardiogram device. The second flow rate is relatively large because when used for a larger electrocardiogram device, for example, in the comparison between the suction bowl 8 used by adults and the suction bowl 8 used by infants, a larger electrocardiogram device requires a greater pressure to comprehensively clean and disinfect its interior. However, in the working mode with a smaller flow rate, the disinfectant or gel cannot be sprayed to the outer edge required by the electrocardiogram device through the spraying column 1, resulting in the electrocardiogram device not being comprehensively cleaned and disinfected or the patient's skin not being moistened to conduct electricity. At this time, based on the judgment of the electrocardiogram device information and the patient's status information, the pressure component needs to increase the pressure to increase the flow rate so that the fluid sprayed from the spraying column 1 can cover the electrocardiogram device. That is, the flow signal controls the flow rate of the sprayed fluid, and the pressure signal controls the flow velocity of the sprayed fluid.

[0054] In the above setting mode, the pressure component can be provided with a buffer chamber to pre-store a quantitative fluid flow rate. That is, the two working models are separated by the buffer chamber. The pressure component pre-injects a quantitative amount of fluid into the buffer chamber and then sprays it out through the spraying column 1. The spraying flow rate is also controlled by the pressure component, thereby forming rapid cleaning and disinfection of the electrocardiogram device.

[0055] The information of the electrocardiogram device includes at least the shape and size information of the suction ball used and the size information of the electrode clip. The shape and size information of the suction ball is used to characterize the shape of the suction ball used in the current electrocardiogram detection, which can be obtained by using a vision sensor through image processing or through the setting of medical staff. The size information of the electrode clip is used to characterize the shape of the electrode clip used in the current electrocardiogram detection, which can also be obtained by using a vision sensor through image processing or through the setting of medical staff. The status information of the patient includes at least the age of the patient, and it can also include the special signs of the patient, such as the atrial position, the type of allergen, etc. The status information of the patient characterizes the size of the electrocardiogram device used by the patient or the required degree of disinfection. The size of the electrocardiogram device is the same as above, reflecting the quantification of the required disinfectant or gel. The required degree of disinfection means that when the disinfectant or gel acts on the patient's skin, the patient's own skin condition will cause the inability to use this type of disinfectant or gel. For example, the patient's skin is allergic to the gel, or the patient is too young to withstand the disinfectant, or the patient's skin is damaged, and the disinfectant or gel will cause great pain. In the above cases, no fluid is sprayed out, and a warning signal is sent to remind the medical staff. The status information of the patient can be obtained through a previous outpatient visit or the patient's medical history.

[0056] When the operator can see the arc-shaped contour of the adsorption surface 11 in the negative pressure state, the pressure parameters collected by the pressure component can be viewed. Through multiple trainings or operation experiences, medical staff can determine that the negative pressure reaches the appropriate range and stop inhalation when seeing the arc-shaped contour of the adsorption surface 11. Compared with the need for medical staff to observe the shape change of the adsorption surface 11 and the change data of the pressure parameters on the electronic screen at the same time, medical staff can determine whether the negative pressure reaches the pressure range through the characteristics of the contour shape of the adsorption surface 11. The attention matters of the operator are reduced and it is less likely to make mistakes.

[0057] Embodiment 4

[0058] This embodiment is a further improvement of the above embodiment, and the repeated content will not be elaborated.

[0059] In the above embodiments, the specific arrangement and principle of the spraying member and the adsorption member are described. However, in the prior art, the steps of using an electrocardiogram electrode include: cleaning the patient's surface skin to ensure complete adsorption of the electrocardiogram electrode; placing a gel or paste between either and / or both of the patient and the electrode (in the present invention, between the contour limiting structure 10 and / or the spraying member); applying pressure to the electrode to adsorb the electrode onto the patient's skin. During removal, in the prior art, the negative pressure adsorption capacity of the adsorption device is destroyed by simply changing the structure of the adsorption device (such as by squeezing flat and / or rotating and / or lifting the edge, etc.), so as to remove the electrocardiogram electrode, and the gel or paste remaining on the patient and the electrocardiogram electrode is wiped off, and disinfected with a disinfectant for reuse.

[0060] According to a preferred embodiment, the spraying column 1 is omitted by simplifying the spraying member. The fixing plate 4 and the buckle column 6 form a limiting structure. Figure 8 Another embodiment of the present invention is shown, which has an electrode column 12 connected to the contour limiting structure 10. The electrode column 12 is externally connected to the electrode wire 13 through the fixing plate 4 and the buckle column 6. A valve 14 for discharging the gas in the adsorption surface 11 is also provided inside the electrode column 12. Preferably, the valve 14 is a one-way valve for discharging the gas in the adsorption surface 11, and the valve 14 generates negative pressure in the adsorption surface 11. Preferably, the valve 14 can be made of a conductive material. The electrode wire 13 is connected to the electrode column 12 through the fixing plate 4 and the buckle column 6, and the electrode wire 13 is detachable and replaceable.

[0061] According to a preferred embodiment, the contour limiting structure 10 extends inward to form an electrode column 12 in the center of the adsorption surface 11. The electrode column 12 is provided as a hollow column, and the valve 14 is arranged therein. The contour limiting structure 10 divides the adsorption surface 11 into multiple chambers such that the contraction of at least one chamber makes the adsorption surface 11 in a negative pressure state to fit onto the patient's skin. Preferably, the electrode column 12 is made of a conductive material. Preferably, the contour limiting structure 10 can be made of a non-conductive material. Preferably, the electrode column 12 is provided as a cylinder and has a conductive part with a cylindrical inner surface.

[0062] Figure 8A cross-sectional view of the above electrode post 12 is shown. It includes: an electrode wire 13, a valve 14, a fixing plate 4, a buckle post 6, a pressing spring 15, an O-ring 16, an umbrella-shaped member 17, an air outlet 18, and a flexible member 19. The above components are adaptively arranged in the electrode post 12. The air outlet 18 allows the pressure from the valve 14 to be released to the flexible member 19. Among them, the flexible member 19 is set as a conductive polymer flexible member. Preferably, the electrode post 12 can conduct current and is made of a conductive material. The flexible member 19 is in direct contact with the patient's skin to provide conductivity from the electrode post 12 to the patient's skin instead of gel and / or paste. In the prior art, when the electrode is in direct contact with the patient's skin, the disinfection process of the electrode is too complicated, and each component needs to be disinfected separately, and there will be a problem that high-value components need to be discarded. For example, the gel and / or paste used will inevitably enter the electrode cavity, and it is difficult for the disinfectant to disinfect it comprehensively. The incomplete disinfection process may lead to possible infections of the patient. Usually, this part needs to be directly discarded, resulting in a rapid increase in cost. The present invention uses the flexible member 19 instead of the gel and / or paste and contacts the patient's skin. The umbrella-shaped member 17 is connected to the valve 14 through a series of linkage components. During use, only the umbrella-shaped member 17 and the flexible member 19 need to be discarded, and the components inside that constitute the metal electrode member do not need to be discarded, saving the use cost and facilitating removal. The electrode post 12 is made of metal or other rigid materials, and these materials contacting the patient's skin will cause discomfort to the patient. The flexible member 19 provides a comfortable effect for the patient. The extended length of the umbrella-shaped member 17 is less than the height of the adsorption surface 11, so that a gap is generated between the electrode post 12 and the patient's skin, and this gap is filled by the flexible member 19. In addition, the electrocardiogram electrodes in the prior art often cannot adhere well to the patient's skin, especially when adhered to the chest of patients with hairy, sweating, moist skin and / or oily skin. In this case, even if an adhesive is used to improve the connection effect between the electrocardiogram electrode and the patient's skin, it is impossible to adhere to the patient's skin and maintain continuous contact with the patient's skin during the electrocardiogram test. Therefore, medical staff need to repeatedly add the adhesive to the patient's skin for connection and / or use a new adhesive for connection, which causes great inconvenience to the medical staff. And when removing the current electrocardiogram electrode from the chest of a hairy patient, since the current electrocardiogram electrode adheres to the patient's chest and / or the hair on the patient's chest through the adhesive, removing the electrocardiogram from the patient's chest will cause discomfort to the patient because removing the adhesive will cause the hair to be pulled out, thus bringing pain and discomfort to the patient. In response to this, the present invention contacts the patient's skin through the flexible member 19, and firmly contacts the electrode to the patient's skin through the negative pressure state of the adsorption surface 11, as well as the adsorption effect and conductive effect of the valve 14.

[0063] Specifically, the electrode post 12 includes: an electrode wire 13, a valve 14, a fixing plate 4, a buckle post 6, a pressing spring 15, an O-ring 16, an umbrella-shaped member 17, an air outlet 18, and a flexible member 19. The electrode wire 13 and the valve 14 are connected to the fixing plate 4 and the buckle post 6. The valve 14 is sequentially connected to the pressing spring 15, the O-ring 16, and the air outlet 18 on the umbrella-shaped member 17. The air outlet 18 is provided on the umbrella-shaped member 17 to prevent the gel and / or paste and / or the patient's skin from directly contacting the internal metal electrode member and prevent it from being contaminated, so that a complete replacement is required. The concave surface of the electrode post 12 where the flexible member 19 is located can provide an electrical connection from the patient's skin to the electrode. The pressing spring 15 is used to control the tension of the adsorption surface 11 on the patient's skin surface. The O-ring 16 is, for example, a stainless steel ball. Through the cooperative arrangement of the electrode wire 13, the valve 14, the pressing spring 15, the O-ring 16, and the umbrella-shaped member 17, the internal structure of the electrode post 12 has elasticity, can conduct electricity, can accurately cover the patient's skin, can be connected in cooperation with the contour limiting structure 10 and the adsorption surface 11, and can also be conveniently disassembled and disinfected. The method of only replacing the umbrella-shaped member 17 and the flexible member 19 reduces the cost of electrocardiogram detection. Electrodes with adhesives not only cause waste but also harm the environment after single use and being discarded. The waste generated by each electrocardiogram detection increases the loss. However, the present invention attracts through a negative pressure state, and the umbrella-shaped member 17 and the flexible member 19 are set as contacts. When discarding, only the unimportant umbrella-shaped member 17 and the flexible member 19 need to be discarded, while the internal metal electrode member and the negative pressure forming member do not need to be discarded, saving the use cost while ensuring the efficient progress of electrocardiogram detection.

[0064] Throughout the text, the features guided by "preferably" are only an optional manner and should not be understood as being necessarily provided. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

[0065] It should be noted that the above specific embodiments are exemplary. Those skilled in the art can come up with various solutions inspired by the disclosure content of the present invention, and these solutions also belong to the disclosure scope of the present invention and fall within the protection scope of the present invention. Those skilled in the art should understand that the description and drawings of the present invention are illustrative and do not constitute a limitation on the claims. The protection scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electrocardiogram device, comprising a suction cup (8), a suction ball (9) and a lead wire, characterized in that, Further comprising: A spraying member, the spraying member comprising: A spraying column (1) having a spraying surface, a plurality of through holes (2) on the spraying surface, and a first central hole (3) provided with an engaging structure; A fixing disk (4) having a second central hole (5) corresponding to the first central hole (3), wherein the first central hole (3) and / or the second central hole (5) serve as channels to receive fluid so as to guide the fluid to the spraying surface and enter the suction cup (8) through the plurality of through holes (2); and A fastening column (6) which is placed into the suction cup (8) and forms an engaging connection structure with the first central hole (3) through the second central hole (5). The fastening column (6) is configured to be snapped into and engaged with the spraying column (1). The fastening column (6) is provided with a column (7), the size of the column (7) being capable of passing through the second central hole (5) of the fixing disk (4), and the flange portion of the fastening column (6) being unable to pass through the second central hole (5) of the fixing disk (4). The spraying column (1) and the fastening column (6) are configured such that when the column (7) of the fastening column (6) enters from the second central hole (5) of the fixing disk (4) and engages with the first central hole (3) of the spraying column (1), they are fixed on opposite sides of the fixing disk (4). The plurality of through holes (2) on the spraying surface are used to balance the fluid pressure so that it can be evenly sprayed into the suction cup (8). Along the direction of fluid movement, the diameters of the plurality of through holes (2) increase in sequence so that the fluid flow rate flowing out of each through hole (2) is the same.

2. The electrocardiogram device according to claim 1, characterized in that, The device further comprises: An adsorption member, the adsorption member comprising: At least one contour limiting structure (10) which is connected to the fixing disk (4) and extends from the fixing disk (4) towards the spraying column (1); An adsorption surface (11) which is connected to the contour limiting structure (10) and forms a suction cup-shaped structure covering the spraying column (1).

3. The electrocardiogram device according to claim 2, characterized in that The plurality of contour limiting structures (10) are used to maintain the suction force of the adsorption surface (11) and the accuracy of electrocardiogram detection; Supported by the plurality of contour limiting structures (10), the adsorption surface (11) is divided into at least two fan-shaped surfaces. By discharging the air inside the adsorption surface (11), the at least two fan-shaped surfaces contract inwards to form a negative pressure state.

4. The electrocardiogram device according to claim 3, wherein The adsorption member may further be provided with a valve for reducing the pressure of the adsorption surface (11). The valve is connected to at least one of the contour limiting structures (10) and to the lead wire. In the case where the user deforms the adsorption surface (11) by extrusion, the valve can be used to discharge the air therein and lock the negative pressure state, so that the adsorption member is closely attached to the patient's skin.

5. The electrocardiogram device according to claim 4, wherein The device further comprises: a data unit and a control unit, The data unit is used to acquire the information of the currently used electrocardiogram device and the status information of the patient. The control unit is configured to be able to determine a flow signal related to the fluid flow rate when cleaning and disinfection are required based on the device information and status information sent by the data unit. The control unit can also determine a pressure signal related to the fluid pressure when cleaning and disinfection are required based on the device information and status information sent by the data unit; The control unit is further configured to: regulate a pressure component related to the flow signal based on the generation of the pressure signal.

6. A method for using an electrocardiogram device according to any one of claims 1 to 5, characterized in that, A spraying member, the spraying member comprising: A spraying column (1), which has a spraying surface, a plurality of through holes (2) on the spraying surface, and a first central hole (3) provided with an engaging structure; A fixing disk (4), which has a second central hole (5) corresponding to the first central hole (3), wherein the first central hole (3) and / or the second central hole (5) serve as channels to receive the fluid, so as to guide the fluid to the spraying surface and enter the suction bowl (8) through the plurality of through holes (2); and A buckle column (6), which is placed in the suction bowl (8) and forms an engaging connection structure with the first central hole (3) through the second central hole (5).

7. The usage method according to claim 6, characterized in that, An adsorption member, the adsorption member comprising: At least one contour limiting structure (10), which is connected to the fixing disk (4) and extends from the fixing disk (4) towards the spraying column (1); An adsorption surface (11), which is connected to the contour limiting structure (10) and forms a suction cup-like structure covering the spraying column (1).

8. The usage method according to claim 7, characterized in that, A data unit and a control unit, The data unit is used to obtain the information of the currently used electrocardiogram device and the status information of the patient, and the control unit is configured to be able to determine a flow signal related to the fluid flow when cleaning and disinfection are required based on the device information and status information sent by the data unit; The control unit can also determine a pressure signal related to the fluid pressure when cleaning and disinfection are required based on the device information and status information sent by the data unit; The control unit is further configured to: regulate a pressure component related to the flow signal based on the generation of the pressure signal.

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