CN219229868U

CN219229868U - Anti-pulling pressure measuring catheter

Info

Publication number: CN219229868U
Application number: CN202222980779.0U
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: 2023-06-23
Anticipated expiration: 2032-11-09

Abstract

The utility model discloses a tensile pressure measuring catheter which comprises a stress connecting piece and a plurality of pressure measuring units connected in sequence, wherein each pressure measuring unit comprises a sensor carrier and a hollow tube which are connected; one end of the stress connecting piece is connected with the sensor carrier, and the other end of the stress connecting piece is connected with the other sensor carrier or the rigid stress piece. The utility model solves the technical problem of developing a tensile pressure measuring catheter with more accurate pressure measurement, higher integrity and connection reliability.

Description

Anti-pulling pressure measuring catheter

Technical Field

The utility model relates to the technical field of high-resolution gastroesophageal pressure measurement catheters, in particular to a pulling-resistant pressure measurement catheter.

Background

The current gastroesophageal diseases tend to rise frequently year by year, the conventional rash treatment technology such as gastroscopy and digestive tract radiography technology only can detect most gastroesophageal organic lesions and partial dynamic diseases, but most gastroesophageal dynamic abnormal diseases such as gastroesophageal reflux disease, cardiac achalasia and the like cannot be systematically, accurately and intuitively described and evaluated, high-resolution esophageal manometry (HRM) technology is often adopted for detection, and the current solid state manometry catheters commonly used in the market are divided into a capacitive pressure sensor and a resistive pressure sensor, and have the problems of complex process, high cost and the like, and have the problems of small manometric angle, poor accuracy, easiness in breakage, narrow coverage and the like.

Meanwhile, the gastroesophageal tract of a human body has bending change, so that the pressure measuring catheter needs to keep certain flexible bending performance, but has certain resistance in entering or exiting the gastroesophageal tract, and also needs to bear the pressure in the gastroesophageal tract, and further needs to have certain integrity and connection reliability, and needs to avoid that the pressure measuring catheter is stretched and prolonged and even pulled and broken so as not to cause measurement inaccuracy and medical accidents.

Accordingly, those skilled in the art have focused their efforts on developing a tensile pressure catheter that is more accurate in pressure measurement, more integrated and more reliable in connection.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present utility model discloses a tensile pressure measuring catheter, and aims to provide a tensile pressure measuring catheter with more accurate pressure measurement, higher integrity and connection reliability.

In order to achieve the above purpose, the utility model provides a pulling-resistant pressure measuring catheter, which comprises a stress connecting piece and a plurality of pressure measuring units connected in sequence, wherein each pressure measuring unit comprises a sensor carrier and a hollow tube which are connected; one end of the stress connecting piece is connected with the sensor carrier, and the other end of the stress connecting piece is connected with the other sensor carrier or the rigid stress piece.

Preferably, the sensor carrier is provided with a first through hole along the axial direction, and the rigid stress element is provided with a second through hole along the axial direction.

Preferably, the tail ends of the connected pressure measuring units are connected with rubber pipes, the rubber pipes are positioned outside the body during pressure measurement, the other ends of the rubber pipes are connected with a transfer device, and the rigid stress piece is arranged in the transfer device or the rubber pipes. The stress connecting piece can be connected and fixed with two sensor carriers at two ends respectively, one end of the stress connecting piece can be connected and fixed with the sensor carriers, and the other end of the stress connecting piece is connected and fixed to the independent rigid stress piece, so that the rubber tube can be partially or completely supported, and the tensile property of the rubber tube is improved.

Preferably, in order to facilitate insertion into a natural cavity of a human body, the head ends of the connected pressure measuring units are connected with an insertion head, one end of the insertion head is closed, and the other end of the insertion head is a connector matched with the sensor carrier. Specifically, the insertion head is of a smooth transition solid conical structure with one end being sealed, a connector at the other end of the insertion head is connected with a sensor carrier of a first pressure measuring unit, the first pressure measuring unit is connected with a second pressure measuring unit, and the like until the first pressure measuring unit is connected to an Nth pressure measuring unit, the other end of the last pressure measuring unit is connected with a rubber tube and then is connected to a transfer device, and the transfer device is connected with data analysis equipment. The cable formed by the lead wires of the previous pressure measuring unit sequentially passes through the hollow tube and then passes through the hollow tube of the next pressure measuring unit until the tail end pressure measuring unit and the hollow tube are penetrated out. The insertion head and the hollow tube are made of flexible materials, and the flexible materials are preferably polyethylene, polypropylene, polyamide, polyurethane, silica gel and the like.

Preferably, a connecting hole is formed in one end of the sensor carrier, a fixing hole is formed in one end of the rigid stress member, and the connecting hole and the fixing hole can be used for fixing the end part of the stress connecting member.

Preferably, the rigid stress piece comprises a limiting ring, connecting rings are arranged on two sides of the limiting ring, the limiting ring and the two connecting rings are internally provided with the second through holes, anti-slip convex rings are arranged outside the two connecting rings, and one connecting ring is provided with the fixing hole.

Preferably, the end of the force-receiving connector may be fixed to the inner wall of the first through hole or the second through hole.

The stress connecting piece can be connected with the connecting hole of the sensor carrier or the fixing hole of the rigid stress piece in a winding and binding mode; the sensor carrier can be fixed on the inner wall of the first through hole of the sensor carrier or the inner wall of the second through hole of the rigid stress piece in a gluing fixing or welding fixing mode.

Preferably, the stress connecting piece is a connecting line segment made of a bendable, tensile and inelastic material. The length of the stress connecting piece is smaller than or equal to the natural length of the fixed pressure measuring unit, and the material of the stress connecting piece is usually wire harnesses or steel wires and the like.

Preferably, the sensor carrier comprises a mounting part, the two ends of the mounting part are connecting parts, the mounting part and the connecting parts are provided with hollow first through holes in the same axial direction, the mounting part is provided with a plurality of accommodating grooves, the plurality of accommodating grooves are uniformly distributed along the circumferential direction of the mounting part, the number of the sensors is increased by increasing the number of the accommodating grooves, and the pressure detection of 360 degrees on the circumferential surface of the shaft can be realized. The bottom of holding tank is equipped with lead wire hole and air vent, and pressure sensor's wire passes through in the lead wire hole penetrates the through-hole. In addition, the diameter of the installation part is larger than that of the connecting part, the connecting part is provided with a protruding structure, and the installation parts at the two ends can be respectively inserted into the bendable hollow pipes to form connection and then are sequentially connected in series with the installation 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.

Furthermore, the pressure sensor is a semiconductor resistance type pressure sensor made of monocrystalline silicon, and according to the piezoresistive effect of the monocrystalline silicon, a strain resistance circuit on an elastic diaphragm of the pressure sensor generates resistance change along with mechanical deformation, and strain signals are transmitted to the outside through a corresponding circuit of the sensor. One side of an elastic diaphragm of the pressure sensor is communicated with reference pressure (atmospheric pressure in this case) to form a reference, and the other side of the elastic diaphragm is an induction side for inducing 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, and 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 with medical adhesive conforming to biocompatibility.

The beneficial effects of the utility model are as follows:

the two ends of the stress connecting piece are respectively connected with the sensor carriers for fixing at least more than two pressure measuring units of the pressure measuring catheter, and the stress connecting piece is used for bearing the tensile stress of the length direction of the pressure measuring catheter, so that the pressure measuring units in the connecting and fixing range cannot be expanded and extended to be longer after being limited when being stretched by external force, the pressure measuring catheter, the lead wire and the like are protected from being pulled and broken, and the integrity and the connection reliability are improved. Meanwhile, one end of the stress connecting piece can be connected with the sensor carrier, the other end of the stress connecting piece extends backwards until the tail end of the pressure measuring unit or a rubber tube connected with the pressure measuring unit, the other end of the stress connecting piece is fixed through the rigid stress piece, the integral connection reliability is further enhanced, integral extension and elongation are avoided, and the integral connection reliability is higher. On the other hand, through setting up the sensor carrier, can fix the position of pressure sensor to protect pressure sensor etc. for the pressure measurement result is more accurate.

Drawings

FIG. 1 is a schematic view of a portion of the exterior construction of a pressure catheter of the present utility model;

FIG. 2 is a schematic view of a portion of the internal structure of a pressure catheter of the present utility model;

FIG. 3 is a schematic view of the overall construction of the pressure catheter of the present utility model;

FIG. 4 is a schematic view of the structure of the insertion head of the pressure catheter of the present utility model;

FIG. 5 is a schematic view of the structure of the rigid force-bearing member of the pressure catheter of the present utility model;

FIG. 6 is a schematic view of the sensor carrier of the pressure catheter of the present utility model;

fig. 7 is a schematic partial cross-sectional view of a pressure catheter 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 first through hole; 2. a hollow tube; 3. a force-bearing connection; 4. a rigid force-bearing member; 41. a limiting ring; 42. a connecting ring; 421. an anti-slip collar; 43. a second through hole; 44. a fixing hole; 5. a rubber tube; 6. a transfer device; 7. an insertion head; 71. a connector; 8. a pressure sensor; 81. and (5) conducting wires.

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 pulling-resistant pressure measuring catheter, which comprises a stress connecting piece 3 and a plurality of pressure measuring units connected in sequence, wherein each pressure measuring unit comprises a sensor carrier 1 and a hollow tube 2 which are connected; one end of the stress connecting piece 3 is connected with the sensor carrier 1, and the other end of the stress connecting piece 3 is connected with the other sensor carrier 1 or connected with the rigid stress piece 4. The stress connecting piece 3 is a connecting line segment made of bendable, anti-pulling and inelastic materials, the length of the stress connecting piece 3 is smaller than or equal to the natural length of the fixed pressure measuring unit, and the material of the stress connecting piece 3 is usually selected from wire harnesses or steel wires and the like.

As shown in fig. 3, the tail ends of the connected pressure measuring units are connected with a rubber tube 5, the rubber tube 5 is positioned outside the body during pressure measurement, the other end of the rubber tube 5 is connected with a transfer device 6, and the rigid stress piece 4 is arranged in the transfer device 6 or the rubber tube 5. The stress connecting piece 3 can be connected and fixed with two sensor carriers 1 at two ends respectively, one end of the stress connecting piece can be connected with the sensor carriers 1, and the other end of the stress connecting piece is connected and fixed on the independent rigid stress piece 4, so that the rubber tube 5 can be partially or completely supported, and the tensile property of the rubber tube 5 is improved.

Meanwhile, in order to facilitate the insertion into the natural cavity of the human body, the head ends of the connected pressure measuring units are connected with insertion heads 7, as shown in fig. 4, the insertion heads 7 are closed at one end, and the other ends are connectors 71 matched with the sensor carrier 1. Specifically, the insertion head 7 is a solid conical structure with one end closed and smooth transition, the connector 71 at the other end of the insertion head 7 is connected with the sensor carrier 1 of the first pressure measuring unit, the first pressure measuring unit is connected with the second pressure measuring unit, and so on until the first pressure measuring unit is connected with the nth pressure measuring unit, the other end of the last pressure measuring unit is connected with the rubber tube 5 and then is connected with the transfer device 6, and the transfer device 6 is connected with the data analysis equipment. The cable formed by the wires 81 of the previous load cell passes through the hollow tube 2 in sequence and then through the hollow tube 2 of the next load cell until the end load cell and the hollow tube 2 pass out. The insertion head 7 and the hollow tube 2 are made of flexible materials, and the flexible materials are preferably polyethylene, polypropylene, polyamide, polyurethane, silica gel and the like.

As shown in fig. 5 and 6, the sensor carrier 1 is provided with a first through hole 13 along the axial direction, the rigid stress element 4 is provided with a second through hole 43 along the axial direction, and the end part of the stress connection element 3 can be fixed on the inner wall of the first through hole 13 or the second through hole 43 in the first embodiment; in another embodiment, the sensor carrier 1 has a connecting hole 122 at one end, and the rigid stress element 4 has a fixing hole 44 at one end, where the connecting hole 122 and the fixing hole 44 can be used to fix the end of the stress connection element 3.

Specifically, as shown in fig. 5, the rigid stress member 4 includes a limiting ring 41, and when in connection, two side surfaces of the limiting ring 41 are abutted against the end surface of the rubber tube 5, so as to perform the limiting and sealing functions. The two sides of the limiting ring 41 are provided with connecting rings 42, the limiting ring 41 and the two connecting rings 42 are internally provided with second through holes 43, the two connecting rings 42 are externally provided with anti-slip convex rings 421, the anti-slip convex rings 421 play a role in preventing falling off when the connecting rings 42 are connected with the end heads of the rubber tubes 5, and one connecting ring 42 is provided with a fixing hole 44.

As shown in fig. 6 and 7, the sensor carrier 1 includes a mounting portion 11, the mounting portion 11 has a connecting portion 12 at both ends, the mounting portion 11 and the connecting portion 12 have a hollow first through hole 13 in the same axial direction, the mounting portion 11 is provided with a plurality of accommodating grooves 111, the plurality of accommodating grooves 111 are uniformly distributed along the circumferential direction of the mounting portion 11, the number of sensors is increased by increasing the number of accommodating grooves 111, and pressure detection of 360 ° about the circumferential surface of the shaft can be achieved. The bottom of the accommodation groove 111 is provided with a lead hole 112 and a vent hole 113, and the lead wire 81 of the pressure sensor 8 is inserted into the through hole through the lead hole 112. In addition, the diameter of the mounting part 11 is larger than that of the connecting part 12, the connecting part 12 is externally provided with a protruding structure 121, and the mounting parts 11 at two ends can be respectively inserted into the bendable hollow pipes 2 to form connection and then sequentially connected in series to the mounting part 11 of the next sensor carrier 1 to form a pressure measuring catheter. The protruding structure 121 is an annular protrusion, so that friction force can be increased when the hollow tube 2 is connected, connection firmness is ensured, and separation and falling-off of the sensor carrier 1 and the hollow tube 2 are prevented.

In the two embodiments, the stress connecting piece 3 can be connected with the connecting hole 122 of the sensor carrier 1 or the fixing hole 44 of the rigid stress piece 4 in a winding and binding mode; it can also be fixed by means of glue or welded fastening, etc., to the inner wall of the first through hole 13 of the sensor carrier 1 or to the inner wall of the second through hole 43 of the rigid force-bearing member 4.

Furthermore, the pressure sensor 8 in the utility model is a semiconductor resistance type pressure sensor 8 made of monocrystalline silicon, and a strain resistance circuit on an elastic diaphragm of the pressure sensor 8 generates resistance change along with 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. One side of the elastic diaphragm of the pressure sensor 8 is communicated with a reference pressure (atmospheric pressure in this case) to form a reference, and the other side of the elastic diaphragm is an induction side for inducing pressure change. The pressure sensor 8 is mounted in the receiving 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 8 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 81 are typically insulated cables, each pressure sensor 8 being connected directly to one end of a set of individual wires 81 or relayed using other conductive materials, each pressure sensor 8 being connected with at least three wires 81.

In addition, the outer side surface of the pressure sensor 8 is coated with a soft adhesive block, which can not only transmit external pressure as a medium to make pressure transmission more sensitive, but also protect the sensing side outside the pressure sensor 8 from external force damage, and also protect the connection of the pressure sensor 8 and the lead 81 from damage. The soft adhesive mass is preferably coated with biocompatible medical adhesive on the surface of the pressure sensor 8.

In the above embodiment, the two ends of the stress connecting piece 3 are respectively connected with the sensor carrier 1 for fixing at least more than two pressure measuring units of the pressure measuring catheter, and the stress connecting piece 3 is used for bearing the tensile stress of the length direction of the pressure measuring catheter, so that the pressure measuring units in the connection fixing range cannot be expanded and extended to be longer after being limited when being stretched by external force, thereby playing the roles of protecting the pressure measuring catheter, the lead 81 and the like from being pulled and broken, and improving the integrity and the connection reliability. Meanwhile, the stress connecting piece 3 can be connected with the sensor carrier 1 at one end, the other end extends backwards until the tail end of the pressure measuring unit or the rubber tube 5 connected with the pressure measuring unit, the other end of the stress connecting piece 3 is fixed through the rigid stress piece 4, the overall connection reliability is further enhanced, the overall extension and elongation are avoided, and the integrity and the connection reliability are higher. On the other hand, by providing the sensor carrier 1, the position of the pressure sensor 8 can be fixed, and the pressure sensor 8 and the like can be protected, so that the pressure measurement result is more accurate.

Thus, the pressure catheter of the present utility model has the following advantages:

1) 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.

2) The connection is reliable: after the stress connecting piece is added to the connection between the pressure measuring units, the whole and partial extension and elongation of the catheter can be avoided, and the problems of loosening of the catheter, breakage of an internal signal cable and the like are avoided.

3) The reject ratio is reduced, and the product through rate is improved: the problems of unreliable connection lines, broken lines and the like caused by extension of the pressure measuring guide pipe in the production process are avoided, the defective rate of the production process can be reduced, the straight-through rate of products is improved, and the production cost is reduced.

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. Anti pressure measurement pipe that pulls, its characterized in that: the pressure measuring device comprises a stress connecting piece (3) and a plurality of pressure measuring units which are connected in sequence, wherein each pressure measuring unit comprises a sensor carrier (1) and a hollow tube (2) which are connected; one end of the stress connecting piece (3) is connected with the sensor carrier (1), and the other end of the stress connecting piece (3) is connected with the other sensor carrier (1) or connected with the rigid stress piece (4).

2. The pull-resistant pressure catheter of claim 1, wherein: the sensor carrier (1) is provided with a first through hole (13) along the axial direction, and the rigid stress part (4) is provided with a second through hole (43) along the axial direction.

3. The pull-resistant pressure catheter of claim 2, wherein: the tail ends of the connected pressure measuring units are connected with rubber pipes (5), the other ends of the rubber pipes (5) are connected with a transfer device (6), and the rigid stress piece (4) is arranged in the transfer device (6) or the rubber pipes (5).

4. A pull-resistant pressure catheter according to claim 3, wherein: the head ends of the connected pressure measuring units are connected with an insertion head (7), one end of the insertion head (7) is closed, and the other end of the insertion head is a connector (71) matched with the sensor carrier (1).

5. A pull-resistant pressure catheter according to claim 3, wherein: connecting holes (122) are formed in one end of the sensor carrier (1), fixing holes (44) are formed in one end of the rigid stress piece (4), and the connecting holes (122) and the fixing holes (44) can be used for fixing the end portions of the stress connecting pieces (3).

6. The pull resistant pressure catheter of claim 5, wherein: the rigid stress piece (4) comprises a limiting ring (41), connecting rings (42) are arranged on two sides of the limiting ring (41), second through holes (43) are formed in the limiting ring (41) and the two connecting rings (42), anti-slip convex rings (421) are arranged outside the two connecting rings (42), and fixing holes (44) are formed in one connecting ring (42).

7. The pull-resistant pressure catheter of claim 2, wherein: the end of the stress connection piece (3) can be fixed on the inner wall of the first through hole (13) or the second through hole (43).

8. The pull-resistant pressure catheter of claim 1, wherein: the stress connecting piece (3) is a connecting line segment made of bendable, anti-pulling and inelastic materials.

9. The pull-resistant pressure catheter of claim 1, wherein: an accommodating groove (111) is formed in the outer side face of the sensor carrier (1), a lead hole (112) is formed in the bottom of the accommodating groove (111), and a pressure sensor (8) is arranged in the accommodating groove (111).

10. The pull-resistant pressure catheter of claim 9, wherein: the outer side surface of the pressure sensor (8) is coated with a soft adhesive block.