An improved pressure sensor for use in invasive blood pressure monitoring

Abstract

The application provides an improved pressure sensor applied to invasive blood pressure monitoring, which comprises wings and a pressure sensor body, wings are integrally connected to the two sides of the pressure sensor body respectively, and the wings are installed on a mounting frame; a blocking mechanism for keeping the fixed position of the pressure sensor body on the mounting frame to hinder the relative sliding of the two is arranged on the wings on the two sides of the pressure sensor body. The improved pressure sensor applied to invasive blood pressure monitoring has the advantages that the sensor can be more stably fixed with the mounting frame through the blocking mechanism arranged on the wings on the two sides of the pressure sensor body, the pressure sensor body is prevented from being separated from the mounting frame due to factors such as pulling, and meanwhile, the friction between the pressure sensor body and the mounting frame is increased through an adhesive layer, a limiting piece and a wear-resistant block, so that the stability of the connection is further enhanced.

Description

Technical Field

[0001] This invention relates to the field of invasive blood pressure sensor technology, and more specifically to an improved pressure sensor for invasive blood pressure monitoring. Background Technology

[0002] Invasive blood pressure sensors actually measure blood pressure by measuring the pressure difference, that is, the difference between blood pressure and atmospheric pressure. Moreover, the blood pressure sensor does not come into direct contact with the blood, but is measured indirectly by transmitting pressure through saline in the tubing.

[0003] Currently, invasive blood pressure sensors are all mounted on the mounting bracket 13 of the bedside rail (see appendix). Figure 4 The mounting bracket 13 is positioned at the same height and level as the patient's heart. The existing connection method is that the invasive blood pressure sensor has wings on both sides, which are pushed into the slots 14 on the mounting bracket 13 to achieve plug-in installation.

[0004] However, in the existing technology, there are some defects related to connection stability: the wings on both sides of the invasive blood pressure sensor are only connected by plugging, which makes it inconvenient to achieve the final positioning of the invasive blood pressure sensor between the mounting bracket 13. Due to the mess of the infusion tubing, the invasive blood pressure sensor is easily detached from the mounting bracket 13 due to the pulling caused by the medical staff changing the infusion bottle or infusion tubing, and the stability cannot be guaranteed.

[0005] Chinese patent CN 205041387 U discloses an improved pressure sensor. This pressure sensor employs a design with a fixed wing component and a soft padding adhesive layer, allowing for a more comfortable and easily fixed fit to the human body. However, this design still has the following drawbacks: the sensor connection uses an adhesive layer on the extended wing that can be adhered to the patient's skin. Since invasive blood pressure sensors are generally used long-term by critically ill patients, directly adhering the sensor to the patient's skin could easily cause discomfort. Furthermore, to ensure alignment with the heart, placing the invasive blood pressure sensor too close to the heart could significantly hinder any subsequent surgical procedures. Conversely, placing the sensor elsewhere on the patient's skin would not achieve alignment with the heart, potentially affecting the monitored blood pressure values.

[0006] Therefore, based on the shortcomings of existing technologies, a reliable invasive blood pressure sensor is proposed. Summary of the Invention

[0007] This invention proposes an improved pressure sensor for invasive blood pressure monitoring, which solves the problems mentioned in the background art.

[0008] The technical solution of this invention is implemented as follows:

[0009] An improved pressure sensor for invasive blood pressure monitoring includes wings and a pressure sensor body. Wings are integrally connected to both sides of the pressure sensor body and are mounted on a mounting frame. The wings on both sides of the pressure sensor body are provided with a restraining mechanism to keep the pressure sensor body in a fixed position on the mounting frame and prevent relative slippage.

[0010] The mounting bracket has multiple parallel mounting blocks, and each mounting block has a slot on both sides. The flaps and blocking mechanisms on both sides of the pressure sensor body are respectively inserted into the slots on the opposite side of two adjacent mounting blocks.

[0011] Furthermore, a fixing port is provided on the wing, and one side of the blocking mechanism protrudes and is inserted into the fixing port.

[0012] Furthermore, the blocking mechanism includes a fixing block, a connecting piece connected to the fixing block, and a limiting member provided on the connecting piece, wherein the fixing block is inserted into the fixing hole as the protruding side of the blocking mechanism and is adapted to it.

[0013] Furthermore, the height of the fixing block is equal to the depth of the fixing opening, and the fixing block remains flush with the bottom of the wing after it is fitted to the fixing opening.

[0014] Furthermore, the connecting piece is disposed on the surface of the adhesive layer bonded to the flap, and the plane of the connecting piece is flush with the plane of the flap, forming an additional force-bearing area.

[0015] Furthermore, the limiting member is an elastic member, and the sum of the heights of the elastic member, the connecting piece, and the wing exceeds the height of the groove on the mounting block.

[0016] Furthermore, the limiting member is provided with several protrusions.

[0017] Furthermore, one end of the limiting member is provided with a bevel.

[0018] Furthermore, a wear-resistant block with memory deformation is provided on the inclined surface of the limiting member, and the wear-resistant block is a spring-loaded component.

[0019] The beneficial effects of the technical solution provided in this application are as follows:

[0020] This improved pressure sensor for invasive blood pressure monitoring features locking mechanisms on both sides of the sensor body, ensuring a more stable fixation to the mounting bracket and preventing detachment due to pulling or other factors. Furthermore, adhesive layers, limiting components, and wear-resistant blocks increase friction and stability between the sensor body and the mounting bracket, further enhancing connection stability. This improved connection stability prevents detachment and allows the existing mounting bracket height to ensure the sensor body is flush with the heart, thus improving the accuracy of blood pressure monitoring. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the pressure sensor and the blocking mechanism of the present invention;

[0023] Figure 2 This is a schematic diagram of the pressure sensor of the present invention;

[0024] Figure 3 This is a schematic diagram of the explosion-proof mechanism of the present invention;

[0025] Figure 4 This is a schematic diagram showing the assembly state of the pressure sensor and mounting bracket of the present invention.

[0026] In the figure: 1 Pressure sensor body, 2 Wing, 3 Restriction mechanism, 4 Pressure extension tube connector, 5 Pressure signal output terminal connection, 6 Infusion tube connector, 7 Fixing block, 8 Connecting piece, 9 Limiting component, 10 Wear-resistant block, 11 Fixing port, 12 Adhesive layer, 13 Mounting bracket, 14 Groove, 15 Bevel, 16 Mounting block, 17 Pressure tube. Detailed Implementation

[0027] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] Reference Figure 1-3An improved pressure sensor for invasive blood pressure monitoring includes wings 2 and a pressure sensor body 1. Wings 2 are provided on both sides of the pressure sensor body 1 and are mounted on a mounting frame 13. The mounting frame 13 has multiple parallel mounting blocks 16, each with a slot 14 on both sides. The wings 2 and the blocking mechanism 3 on both sides of the pressure sensor body 1 are inserted into the slots 14 on opposite sides of two adjacent mounting blocks 16. The wings 2 act as connectors, engaging with the slots 14 on the mounting frame 13. By aligning the wings 2 with the slots 14 and pushing them from back to front, the wings 2 on the pressure sensor body 1 can be inserted along the inner side of the slots 14 for installation. The wings 2 on both sides of the pressure sensor body 1 are equipped with a mechanism that allows for appropriate elastic deformation under external force. This mechanism is the blocking mechanism 3, which maintains the pressure sensor body 1 in a fixed position on the mounting frame 13, preventing relative slippage between the two. This design addresses the shortcomings in connection stability found in existing technologies, improving the reliability of the connection between the invasive blood pressure sensor and the mounting bracket 13, thereby enhancing the accuracy and reliability of monitoring. Specifically, when the extended wings 2 of the improved pressure sensor body 1 are inserted into the groove 14 of the mounting bracket 13, the retaining mechanism 3 ensures they are contained within the groove 14 and are not easily dislodged. This retaining mechanism 3 guarantees the connection stability between the invasive blood pressure sensor and the mounting bracket 13 even under conditions such as tubing pulling. This improved pressure sensor does not require adhesion or insertion to the patient's skin, avoiding discomfort or pain caused by direct skin contact.

[0029] In this embodiment, a fixing port 11 is provided in the wing 2, and one side of the blocking mechanism 3 protrudes and is inserted into the fixing port 11. This design provides a base for connecting the blocking mechanism 3, solving the problem of inconvenient connection between the wing 2 and the blocking mechanism 3. Specifically, the protrusion of the blocking mechanism 3 can extend and be inserted into the fixing port 11 of the wing 2, thereby fixing the two together. When the wing 2 is connected to the groove 14 of the mounting block 16, the setting of the fixing port 11 prevents the blocking mechanism 3 from being misaligned or detached from the wing 2 due to excessive friction.

[0030] In this embodiment, the blocking mechanism 3 includes a fixing block 7, a connecting piece 8 connected to the fixing block 7, and a limiting member 9 provided on the connecting piece 8. The fixing block 7, as the protruding side of the blocking mechanism 3, is inserted into and adapted to the fixing port 11. The fixing block 7 is adapted to the inner side of the fixing port 11, providing stability and support. The connecting piece 8 is connected to the fixing block 7, allowing the limiting member 9 to be limited on the wings 2 by the connecting piece 8 and the fixing block 7, thereby achieving precise positioning and secure installation of the blocking mechanism 3. The limiting member 9, located on the connecting piece 8, provides limiting support for the wings 2 after insertion into the slot 14, preventing the pressure sensor body 1 from detaching from the mounting block 16 of the mounting bracket 13 due to the instantaneous pulling force exerted by medical personnel on the infusion tube. This embodiment's technological innovation solves the problems of insufficient connection stability and precise positioning of the pressure sensor body 1 in the prior art, improving the effectiveness and safety of the invasive blood pressure sensor.

[0031] In this embodiment, the height of the fixing block 7 is equal to the depth of the fixing opening 11. After the fixing block 7 is fitted to the fixing opening 11, the bottom of the wing 2 remains flush, preventing the fixing block 7 from protruding from the fixing opening 11 and hindering the sliding installation of the wing 2 in the groove 14 of the mounting block 16. In the prior art, the installation of the wing 2 requires insertion into the groove 14. However, when the blocking mechanism 3 is set, the fixing block 7 of the blocking mechanism 3 protrudes from the fixing opening 11, which interferes with the groove 14 of the mounting block 16, potentially causing the wing 2 to fail to install correctly. When the fixing block 7 is set at the same height as the fixing opening 11, the plane of the wing 2 is smooth and without protrusions, avoiding interference to the installation of the wing 2 caused by the fixing block 7 protruding from the fixing opening 11. This embodiment can solve the problem in the prior art where the sliding installation of the wing 2 is hindered in the groove 14 of the mounting block 16 because the fixing block 7 protrudes from the fixing opening 11.

[0032] In this embodiment, the connecting piece 8 is disposed on the surface of the adhesive layer 12 to which the wing 2 is bonded, and the plane of the connecting piece 8 is flush with the plane of the wing 2, forming an additional force-bearing area. This design can compensate for the poor connection stability between the blocking mechanism 3 and the wing 2. By utilizing the design that the plane of the connecting piece 8 is flush with the plane of the wing 2, the adhesive layer 12 can be added to increase the adhesive force and contact area.

[0033] In this embodiment, the limiting member 9 is an elastic member. The sum of the heights of the elastic member, the connecting piece 8, and the wing 2 exceeds the depth of the groove 14 of the mounting block 16. After being compressed in the groove 14 of the mounting block 16, the elastic member undergoes elastic deformation, generating a reaction force applied to the mounting block 16 to achieve the limiting effect. Specifically, the reaction force generated by the elastic member is an elastic force. Elastic force refers to the reaction force exhibited when an elastic member undergoes elastic deformation under the action of an external force and returns to its original shape after the force is removed; it is a force that enables the elastic member to return to its original shape. In this embodiment, when the elastic piece is inserted into the groove 14 and deformed by compression, the elastic force is applied to the inner top wall of the groove 14 to limit the elastic member within the groove 14. This design can effectively solve the problems of wing 2 displacement and instability caused by improper limiting in the prior art. The design incorporates an elastic element that deforms under pressure, creating a reaction force that is applied to the groove 14 of the mounting block 16. This effectively limits the movement of the wing 2, preventing it from shifting or becoming unstable. The limiting element 9 can be made of rubber. The frictional resistance of the locking mechanism 3 within the groove 14 can be achieved by giving the limiting element 9 a certain thickness, forming a friction pair with the corresponding surface of the groove 14. This makes it difficult for the wing 2 to detach from the groove 14. When the operator applies a large thrust along the length of the groove to the limiting element 9, the wing 2 and other components can be inserted into or removed from the groove 14 together.

[0034] In existing technologies, when the flap 2 is subjected to an instantaneous external force, improper positioning can easily cause it to shift position and become unstable, affecting its stability and reliability. In other embodiments, several protrusions can be integrally formed on the side surface of the limiting member 9 facing the groove (i.e., the side surface away from the connecting piece 8). These protrusions can be elastic protrusions, which increase the coefficient of friction between the limiting member 9 and the groove 14. This ensures that even under instantaneous external force, the increased coefficient of friction prevents the flap 2 from instantly detaching from the mounting bracket 16, thus preventing the pressure sensor connected to the infusion tube from being pulled off due to the instantaneous pulling of the infusion tube, which could cause the catheter placed at the patient's measurement site and connected to the pressure sensor to be pulled. Compared to existing technologies, this embodiment has advantages such as more precise positioning, more stable structure, and greater reliability.

[0035] In the prior art, due to the presence of a blocking mechanism 3 on the wing 2, and the height of the blocking mechanism 3, a sufficiently large thrust is required to push the wing 2 into the slot 14 during installation, which easily results in a large initial pushing pressure. To solve this problem, this embodiment provides a slope 15 at one end of the limiting member 9. Specifically, the slope 15 is on the same side as the insertion end of the wing 2 into the slot 14. The slope 15 increases the space for the limiting member 9 to initially enter the slot 14 of the mounting block 16, reducing the contact friction between the limiting member 9 and the mounting block 16, and reducing the thrust required for initial entry into the slot 14 of the mounting block 16, thereby achieving rapid alignment of the limiting member 9. Therefore, the design of the slope 15 achieves effective functional limitation, improves the fitting accuracy between the limiting member 9 and the mounting block 16, reduces assembly difficulty, and improves work efficiency.

[0036] In this embodiment, a wear-resistant block 10 with memory deformation is provided on the end inclined surface 15 of the limiting member 9. The wear-resistant block 10 is a spring-loaded component, which reduces the friction when the limiting member 9 enters the groove 14 of the mounting block 16. The structural feature of this embodiment is that it uses a wear-resistant block 10 made of memory deformation material. That is, when the limiting member 9 enters the groove 14 of the mounting block 16, the wear-resistant block 10 can automatically spring back, compensating for the friction and wear caused by the limiting member 9 contacting the groove 14 when it enters the groove 14.

[0037] Reference Figure 4 This is a schematic diagram of the pressure sensor and mounting bracket 13 assembled in this invention. In this embodiment, the top of the pressure sensor body 1 is provided with a pressure tube 17 for connecting an infusion tube and a pressure extension tube. An infusion tube connector 6 and a pressure extension tube connector 4 are respectively connected to both ends of the pressure tube 17. Furthermore, a pressure signal output terminal connection 5 is fixed to the side of the pressure sensor body 1, and the pressure signal output terminal connection 5 is on the same side as the infusion tube connector 6. In practical applications, the pressure extension tube is inserted into the blood vessel at the site of measurement via puncture. The end of the pressure extension tube furthest from the site of measurement is directly connected to the pressure extension tube connector 4 of the pressure sensor body 1. Due to the pressure transmission effect of fluid, the pressure within the blood vessel will be transmitted to the pressure sensor body 1 through the pressure tube 17 via the liquid in the pressure extension tube.

[0038] The working principle of this embodiment is as follows:

[0039] A blocking mechanism 3 is provided on the wings 2 on both sides of the pressure sensor body 1. The oil paper of the bottom adhesive layer 12 of the connecting piece 8 on the blocking mechanism 3 is peeled off, and the fixing block 7 is aligned with the fixing opening 11 on the wing 2 and pressed down so that the fixing block 7 is correspondingly set in the fixing opening 11. In addition, the bottom adhesive layer 12 of the connecting piece 8 is bonded to the plane of the wing 2, thereby fixing the limiting member 9 and the wear-resistant block 10 provided on the connecting piece 8 to the wing 2. After completing the basic assembly, simply align the wing 2 and the blocking mechanism 3 of the pressure sensor body 1 with the slot 14 opening of the mounting block 16, and push them into the slot 14 accordingly. The inclined surface 15 design of the upper limit block 9 of the blocking mechanism 3 increases the initial space for the wing 2 and the blocking mechanism 3 to enter the slot 14, reducing the initial pushing pressure. To avoid wear between the limit block 9 and the slot 14, the wear-resistant block 10 on the blocking mechanism 3 can compensate for this wear. Its memory deformation elastic design ensures that the initial space does not increase when entering the slot 14, and also counteracts the wear of the slot 14 opening on the end of the limit block 9. With continuous pushing, the wing 2 slides along the bottom of the slot 14, and the elastic design of the limit block 9 ensures that it will not be unable to enter the slot 14 due to its large size. Instead, it will only be able to enter the slot 14 due to the size of the limit block 9. The elastic deformation of the wing 2 and the blocking mechanism 3 causes a slight delay in their entry into the groove 14. When the wing 2 and the blocking mechanism 3 are fully inserted into the groove 14, the reaction force generated by the elastic deformation of the limiting block 9 after being squeezed by the shallow depth of the groove 14 is applied to the top of the groove 14, thereby limiting the wing 2 and the blocking mechanism 3 in the groove 14. At the same time, because the limiting block 9 of the blocking mechanism 3 is provided with a protrusion, the friction coefficient between the limiting part 9 and the groove 14 can be increased by the protrusion, so that it can firmly maintain its relative position under the action of an instantaneous external force, thereby achieving the purpose of limiting the wing 2 and the blocking mechanism 3. Furthermore, the position of the pressure sensor body 1 connected to the wing 2 is fixed, and the invasive blood pressure sensor will not be separated from the mounting bracket 13 due to the pulling caused by the medical staff changing the infusion bottle or infusion tube.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An improved pressure sensor for invasive blood pressure monitoring, comprising a wing (2) and a pressure sensor body (1), wherein the wing (2) is integrally connected to both sides of the pressure sensor body (1), and the wing (2) is mounted on a mounting bracket (13), characterized in that: On the wings (2) on both sides of the pressure sensor body (1), there are blocking mechanisms (3) for keeping the pressure sensor body (1) in a fixed position on the mounting bracket (13) to prevent relative sliding between the two. A fixing port (11) is provided on the wing (2), and one side of the blocking mechanism (3) protrudes and is inserted into the fixing port (11); The blocking mechanism (3) includes a fixing block (7), a connecting piece (8) connected to the fixing block (7), and a limiting member (9) provided on the connecting piece (8), wherein the fixing block (7) is adapted to be inserted into the fixing port (11); The mounting bracket (13) is provided with a plurality of parallel mounting blocks (16); each of the mounting blocks (16) has a groove (14) on both sides, and the flaps (2) and the blocking mechanism (3) on both sides of the pressure sensor body (1) are respectively inserted into the grooves (14) on the opposite side of two adjacent mounting blocks (16).

2. The improved pressure sensor for invasive blood pressure monitoring as described in claim 1, characterized in that, The height of the fixing block (7) is equal to the depth of the fixing opening (11).

3. The improved pressure sensor for invasive blood pressure monitoring as described in claim 1, characterized in that, The adhesive layer (12) bonded to the wing (2) is provided on the surface of the connecting piece (8).

4. The improved pressure sensor for invasive blood pressure monitoring as described in claim 1, characterized in that, The limiting element (9) is an elastic element.

5. The improved pressure sensor for invasive blood pressure monitoring as described in claim 1, characterized in that, The limiting member (9) has several protrusions.

6. The improved pressure sensor for invasive blood pressure monitoring as described in claim 1, characterized in that, One end of the limiting member (9) is provided with a bevel (15).

7. The improved pressure sensor for invasive blood pressure monitoring as described in claim 6, characterized in that, A wear-resistant block (10) with memory deformation is provided on the inclined surface (15) of the limiting member (9), and the wear-resistant block (10) is a spring-loaded member.

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