CN219374644U

CN219374644U - Pressure measuring catheter sensor carrier, pressure measuring structure and pressure measuring catheter

Info

Publication number: CN219374644U
Application number: CN202222979594.8U
Authority: CN
Inventors: 潘冰; 覃浪; �田宏
Original assignee: Chongqing Jinshan Medical Technology Research Institute Co Ltd
Current assignee: Chongqing Jinshan Medical Technology Research Institute Co Ltd
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2023-07-21
Anticipated expiration: 2032-11-09

Abstract

The utility model discloses a pressure measuring catheter sensor carrier which comprises a mounting part, wherein connecting parts are arranged at two ends of the mounting part, the mounting part and the two connecting parts are provided with through holes which penetrate in the same axial direction, and an accommodating groove is formed in the outer side of the mounting part. The utility model solves the technical problem of providing a pressure measuring catheter sensor carrier, a pressure measuring structure and a pressure measuring catheter, wherein the pressure measuring catheter sensor carrier can prevent a sensor and a conductive material from being damaged, and the sensor is more firmly and conveniently installed.

Description

Pressure measuring catheter sensor carrier, pressure measuring structure and pressure measuring catheter

Technical Field

The utility model relates to the technical field of pressure measuring catheters for measuring pressure by using a sensor, in particular to a pressure measuring catheter sensor carrier, a pressure measuring structure and a pressure measuring catheter.

Background

The current gastroesophageal disease is often required to be checked with the aid of a pressure measuring device, and the pressure measuring device is designed according to the pressure measuring principle, and can be designed into a water pressure measuring device and a solid pressure measuring device, wherein the two types of pressure measuring devices mainly differ in a pressure sensing mode. The water pressure measuring device consists of a stable pressure source, a sensor, an electronic amplifier and a multi-channel water perfusion type pressure measuring catheter, and the pressure measuring catheter is connected with the pressure measuring device through liquid serving as a pressure conducting medium, so that the pressure in the pressure sensor connected with the pressure measuring device is changed, the water perfusion type pressure measuring catheter is low in cost, but because of principle and process limitations, the sensing medium for perfusion detection is liquid and is easily influenced by the outside, and the defects of few channels, small measuring range, poor precision, incapability of being used for a long time and the like exist. The solid capacitance pressure measuring catheter avoids the defect of the water filling pressure measuring catheter.

The solid pressure measuring catheter commonly used in the market at present is divided into a capacitive pressure sensor and a resistive pressure sensor, and has the problems of complex process, high cost and the like, and has the problems of small pressure measuring angle, poor accuracy, easiness in breakage, single function, narrow coverage surface and the like. The sensor is a device for detecting pressure accurately, but how to install the sensor on the pressure measuring catheter requiring large-angle bending and how to enable the sensor to be installed firmly and conveniently, and can better protect the sensor and conductive materials from being damaged, meanwhile, the sensor can be measured accurately, and customer experience comfort is better and the like, which are technical problems to be solved by the person in the art.

Accordingly, those skilled in the art have been working to develop a pressure measuring catheter sensor carrier and pressure measuring structure and pressure measuring catheter that can avoid damage to the sensor and conductive material and provide a more secure and convenient sensor installation.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present utility model discloses a pressure measuring catheter sensor carrier, a pressure measuring structure and a pressure measuring catheter, and aims to provide a pressure measuring catheter sensor carrier, a pressure measuring structure and a pressure measuring catheter, which can avoid damage to a sensor and a conductive material and enable the sensor to be installed more firmly and conveniently.

In order to achieve the above purpose, the utility model provides a pressure measuring catheter sensor carrier, which comprises a mounting part, wherein two ends of the mounting part are connecting parts, the mounting part and the two connecting parts are provided with through holes which run through in the same axial direction, and the outer side of the mounting part is provided with a containing groove.

Preferably, the bottom of the accommodating groove is provided with a lead hole and a vent hole.

Preferably, the diameter of the mounting part is larger than that of the connecting part, and the connecting part is provided with a protruding structure.

The mounting parts at the two ends can be respectively inserted into the bendable hollow tubes, and the sensor carrier and the hollow tubes are connected and then connected in series sequentially to the mounting part of the next sensor carrier to form the pressure measuring catheter. The protruding structure is annular protruding, can increase frictional force when connecting the hollow tube, guarantees the fastness of connection, prevents that sensor carrier and hollow tube separation from droing.

Preferably, one of the connecting parts is provided with a connecting hole for installing a stress connecting device, and adjacent or alternate sensor carriers are connected into a whole to avoid the breakage of the pressure measuring catheter.

Preferably, the number of the accommodating grooves is plural, and the plurality of accommodating grooves are uniformly distributed along the circumferential direction of the mounting part.

Preferably, the number of the accommodating grooves is 3-6.

By increasing the number of the accommodating grooves, the number of sensors is increased, and pressure detection of 360 ° to the axial circumferential surface can be achieved.

The utility model also provides a pressure measuring structure, which comprises the pressure measuring catheter sensor carrier, wherein each accommodating groove is internally provided with a pressure sensor.

The pressure sensor is a semiconductor resistance type pressure sensor made of monocrystalline silicon, and a strain resistance circuit on an elastic diaphragm of the pressure sensor generates resistance change according to mechanical deformation according to the piezoresistive effect of the monocrystalline silicon, and transmits a strain signal to the outside through a corresponding circuit of the sensor.

Preferably, the lead wire of the pressure sensor penetrates into the through hole through the lead hole, and the lead wire is led out from the lead hole after passing through and then extends backwards from the through hole.

Preferably, the pressure sensor comprises opposed sensing and reference sides, the reference side abutting the bottom of the receiving recess. The reference side and the sensing side are respectively provided with an elastic membrane, the reference side is communicated with reference pressure (atmospheric pressure in this case) to form a reference, and the sensing side is used for sensing pressure change. The pressure sensor is installed in the accommodating groove, the sensing side faces the outer circumferential surface of the sensor carrier, and the reference side faces the circle center. The bottom of the accommodating groove at the corresponding position of the reference side of the pressure sensor is provided with at least one vent hole communicated with the atmosphere, so that the reference side is conveniently communicated with the atmosphere. The wires are typically insulated cables, each pressure sensor being connected directly to one end of a separate set of wires or relayed using other conductive materials, each pressure sensor being connected with at least three wires.

Preferably, the outer side surface of the pressure sensor is coated with a soft adhesive block. The soft adhesive block can be used as a medium for transmitting external pressure, so that the pressure transmission is more sensitive, the sensing side outside the pressure sensor can be protected from being damaged by external force, and the connection between the pressure sensor and a wire can be protected from being damaged. The soft adhesive block is preferably coated on the surface of the pressure sensor by medical adhesive conforming to biocompatibility.

The utility model also provides a pressure measuring catheter comprising the pressure measuring structure.

The beneficial effects of the utility model are as follows:

through the structural design of the sensor carrier, the accommodating groove is used for installing the pressure sensor, and plays roles in loading, supporting and protecting the pressure sensor. Meanwhile, the through holes form enough lead accommodating spaces, and the leads of the pressure sensor can be bent and then penetrate into the hollow through holes from the lead holes to extend to the data analysis equipment all the way backwards. The pressure measuring catheter sensor carrier ensures that the pressure sensor is not only fixed and protected by the accommodating groove, but also protected by the lead in the through hole, reduces the problem of poor measurement accuracy caused by unstable installation, and is more firm and convenient to install the pressure sensor. Secondly, the holding groove circumference is arranged outside the sensor carrier, so that the pressure measuring catheter formed by the sensor carrier has a larger pressure measuring angle, and the omission is avoided.

Drawings

FIG. 1 is a schematic diagram of an embodiment of a pressure catheter sensor carrier of the present utility model;

FIG. 2 is a schematic cross-sectional view of a catheter sensor carrier according to the present utility model;

FIG. 3 is an internal schematic view of an embodiment of the pressure measurement structure of the present utility model;

fig. 4 is a schematic view of an exploded construction of the pressure measurement structure of the present utility model.

In the above figures: 1. a sensor carrier; 11. a mounting part; 111. a receiving groove; 112. a lead hole; 113. a vent hole; 12. a connection part; 121. a protruding structure; 122. a connection hole; 13. a through hole; 2. a pressure measuring structure; 21. a pressure sensor; 22. a wire; 23. soft and sticky blocks.

Detailed Description

The present utility model will be further described with reference to the drawings and examples, and it should be noted that in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific manner, and thus should not be construed as limiting the present utility model. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 and 2, the utility model provides a pressure measuring catheter sensor carrier 1, which comprises a mounting part 11, wherein connecting parts 12 are arranged at two ends of the mounting part 11, the mounting part 11 and the two connecting parts 12 are provided with coaxially penetrating through holes 13, an accommodating groove 111 is formed in the outer side of the mounting part 11, and a lead hole 112 and a vent hole 113 are formed in the bottom of the accommodating groove 111. The number of the accommodating grooves 111 is plural, the plurality of accommodating grooves 111 are uniformly distributed along the circumferential direction of the mounting portion 11, the number of the specific accommodating grooves 111 may be 3 to 6, or may be set as needed, and in this embodiment, the number of the accommodating grooves 111 is 4. The accommodating groove 111 is used for mounting the sensors, the number of sensors is increased by increasing the number of the accommodating grooves 111, and pressure detection of 360 ° to the axial circumferential surface can be achieved.

More specifically, the mounting portion 11 and the connecting portion 12 are each cylindrical, and of course, the mounting portion 11 may be provided in a polygonal shape. The diameter of the mounting portion 11 is larger than that of the connecting portion 12, and the protruding structure 121 is provided outside the connecting portion 12. The protruding structure 121 is an annular protrusion in this embodiment, which can increase friction force when connecting the hollow tube of the pressure measuring catheter, ensure connection firmness, and prevent the separation and falling of the sensor carrier 1 and the hollow tube. The mounting parts 11 at the two ends can be respectively inserted into the hollow tubes, and the sensor carrier 1 and the hollow tube 3 are connected and then sequentially connected in series to the mounting part 11 of the next sensor carrier 1 to form the pressure measuring catheter. Further, one of the connecting parts 12 is provided with a connecting hole 122, and the connecting hole 122 is used for installing a stress connecting device to connect adjacent or alternate sensor carriers 1 into a whole, so as to avoid the breakage of the pressure measuring catheter.

In this embodiment, by the structural design of the pressure measuring catheter sensor carrier 1, the accommodating groove 111 is used for installing the pressure sensor 21, and plays roles of loading, supporting and protecting the pressure sensor 21. At the same time, the through hole 13 forms enough accommodation space for the lead 22, and the lead 22 of the pressure sensor 21 can be bent and then inserted into the hollow through hole 13 from the lead hole 112 to extend to the data analysis equipment. The sensor carrier 1 ensures that the pressure sensor 21 is not only fixed and protected by the accommodating groove 111, but also the lead 22 is protected in the through hole 13, so that the problem of poor measurement accuracy caused by unstable installation is solved, and the pressure sensor 21 is also more firmly and conveniently installed. Secondly, the accommodating groove 111 is circumferentially arranged outside the sensor carrier 1, so that the pressure measuring catheter formed by the sensor carrier 1 has a larger pressure measuring angle, and the omission is avoided.

As shown in fig. 3 and 4, the present utility model also provides a pressure measuring structure 2 including the sensor carrier 1 as above, and a pressure sensor 21 is installed in each of the receiving grooves 111. The lead 22 of the pressure sensor 21 is inserted into the through hole 13 through the lead hole 112, and the lead 22 is led out from the through hole 13 after passing through the lead hole 112 and then extends rearward from the through hole 13.

In this embodiment, the pressure sensor 21 in the present utility model is a semiconductor resistive pressure sensor 21 made of monocrystalline silicon, and according to the piezoresistive effect of monocrystalline silicon, a strain resistance circuit on an elastic diaphragm of the pressure sensor 21 generates resistance change with mechanical deformation, and transmits a strain signal to the outside through a corresponding circuit of the sensor.

Further, the pressure sensor 21 includes opposite sensing and reference sides, the reference side being abutted against the bottom of the accommodation groove 111. The reference side and the sensing side are respectively provided with an elastic membrane, the reference side is communicated with reference pressure (atmospheric pressure in this case) to form a reference, and the sensing side is used for sensing pressure change. The pressure sensor 21 is mounted in the accommodation groove 111 with its sensing side facing the outer circumferential surface of the sensor carrier 1 and its reference side facing the center of the circle. The bottom of the accommodating groove 111 at the position corresponding to the reference side of the pressure sensor 21 is provided with at least one vent hole 113 communicated with the atmosphere, so that the reference side is conveniently communicated with the atmosphere. The wires 22 are typically insulated cables, each pressure sensor 21 being connected directly to one end of a set of individual wires 22 or relayed using other conductive materials, each pressure sensor 21 being connected with at least three wires 22.

Further, the outer side surface of the pressure sensor 21 is coated with a soft adhesive block 23. The soft adhesive mass 23 can transmit external pressure as a medium, making the pressure transmission more sensitive, and at the same time can protect the sensing side outside the pressure sensor 21 from external force damage, and also can protect the connection of the pressure sensor 21 with the wire 22 from damage. The soft adhesive block 23 is preferably coated with biocompatible medical adhesive on the surface of the pressure sensor 21.

The utility model also provides a pressure measuring catheter comprising a pressure measuring structure 2 as described above. The pressure measuring catheter has the following advantages: simple structure, measure accurate, the reliability is high: the pressure signal is measured by adopting the resistance type pressure sensor, and compared with the existing modes of feeding back pressure such as water pouring and the like, the signal feedback is more accurate; meanwhile, the main body of the pressure measuring catheter is a pressure sensor, so that the pressure measuring catheter has fewer required matched parts, simple structure and high reliability; the product has multiple functions and multiple models: the pressure measuring catheter can increase or decrease the number of pressure measuring structures according to the needs, and various models are realized.

The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. Pressure measurement catheter sensor carrier, its characterized in that: the connecting device comprises an installation part (11), wherein connecting parts (12) are arranged at two ends of the installation part (11), through holes (13) penetrating through the installation part (11) and the two connecting parts (12) in the same axial direction are formed in the outer side of the installation part (11), a plurality of accommodating grooves (111) are formed in the outer side of the installation part (11), and the accommodating grooves (111) are uniformly distributed along the circumferential direction of the installation part (11); a lead hole (112) and a vent hole (113) are formed in the bottom of the accommodating groove (111).

2. The pressure catheter sensor carrier of claim 1, wherein: the diameter of the mounting part (11) is larger than that of the connecting part (12), and a protruding structure (121) is arranged outside the connecting part (12).

3. The pressure catheter sensor carrier of claim 2, wherein: one of the connecting parts (12) is provided with a connecting hole (122).

4. Pressure measurement structure comprising a pressure measurement catheter sensor carrier (1) according to any one of claims 1 to 3, characterized in that: a pressure sensor (21) is installed in each accommodating groove (111).

5. The pressure measurement structure of claim 4 wherein: the lead wire (22) of the pressure sensor (21) penetrates into the through hole (13) through the lead wire hole (112).

6. The pressure measurement structure of claim 5 wherein: the pressure sensor (21) comprises opposite sensing and reference sides, the reference side being in abutment with the bottom of the receiving groove (111).

7. The pressure measurement structure of claim 6 wherein: the outer side surface of the pressure sensor (21) is coated with a soft adhesive block (23).

8. Pressure measurement pipe, its characterized in that: a load cell comprising a load cell according to any one of claims 5 to 7.