Temperature measuring conduit

Abstract

The utility model discloses a temperature measuring catheter, and belongs to the technical field of medical instruments. The temperature measuring conduit comprises a conduit body, and a temperature measuring channel is arranged in the conduit body; the metal heat conduction element is embedded in the catheter body, connected with an opening in the far end of the catheter body in a sealed mode and plugged at the far end of the temperature measurement channel; the temperature measuring unit is arranged in the catheter body, the temperature measuring unit comprises a temperature measuring element, and the temperature measuring element is connected with or abuts against the near end of the metal heat conduction element. According to the utility model, the sensitivity and the precision of the temperature measuring element are improved, the temperature in human tissues can be accurately detected, and the temperature measuring precision can meet the requirement of intracranial temperature measurement.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a temperature measuring catheter. Background Art

[0002] In actual surgical applications, the brain tissue temperature is mostly lowered to 33°C-35°C by intra-arterial infusion of low-temperature saline. This process requires real-time acquisition of the internal jugular vein blood flow temperature to monitor the intracranial temperature and adjust the cooling plan. However, there is currently a lack of simple and feasible monitoring methods in clinical practice. Considering that the internal jugular vein and sigmoid sinus are the parts closest to the intracranial temperature, monitoring the temperature of the internal jugular vein or sigmoid sinus can indirectly reflect the intracranial temperature.

[0003] Patent CN211536156U provides a central venous catheter with a temperature detection function, in which a temperature measuring wire is built into the guide tube; the temperature measuring wire extends to the inside of the main tube, and a thermocouple element is provided at the end thereof; the thermocouple element is located inside the main tube. Although this technical solution can monitor the patient's body temperature in real time, the thermocouple element is enclosed inside the main tube.

[0004] Since existing main pipes mostly use materials such as silicone or TPU to seal or encapsulate thermocouple elements inside the pipe body, the thermal conductivity of the pipe body is limited, which reduces the sensitivity of the thermocouple elements and causes inaccurate temperature measurement, making it difficult for the temperature measurement accuracy to meet the requirements of intracranial temperature measurement.

[0005] Therefore, it is urgent to provide a temperature measuring catheter to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a temperature measuring catheter, which improves the sensitivity and accuracy of the temperature measuring element, ensures accurate detection of the temperature in human tissue, and makes the temperature measuring accuracy meet the requirements of intracranial temperature measurement.

[0007] In order to achieve the above objectives, the following technical solutions are provided:

[0008] Temperature measuring catheter, comprising:

[0009] The catheter body is provided with a temperature measuring channel;

[0010] A metal heat-conducting element is embedded in the catheter body and is sealed with the opening at the distal end of the catheter body and is sealed at the catheter body, and the metal heat-conducting element is sealed at the distal end of the temperature measuring channel;

[0011] A temperature measuring unit is arranged in the catheter body, and the temperature measuring unit includes a temperature measuring element, and the temperature measuring element is connected or abutted with the proximal end of the metal heat-conducting element.

[0012] As an optional solution for the temperature measuring catheter, the distal end of the metal heat-conducting element is in a hemispherical structure.

[0013] As an optional solution for the temperature measuring catheter, the proximal end of the metal heat conducting element is in a hemispherical structure or a truncated surface structure, and the temperature measuring element is fixedly connected to the proximal end of the metal heat conducting element.

[0014] As an optional solution for the temperature measuring catheter, a clamping groove is provided at the proximal end of the metal heat conducting element, and the temperature measuring element is embedded in the clamping groove.

[0015] As an optional solution for the temperature measuring catheter, the temperature measuring element includes a thermocouple, and an adhesive is filled between the temperature measuring element and the inner wall of the clamping groove.

[0016] As an optional solution for the temperature measuring catheter, the temperature measuring unit further includes a wire, the distal end of the wire is electrically connected to the temperature measuring element, and the proximal end of the wire is inserted into the catheter body.

[0017] As an optional solution for the temperature measuring catheter, a developing ring is provided at the distal end of the catheter body.

[0018] As an optional solution for the temperature measuring catheter, a sealing ring is provided between the inner wall surface of the catheter body and the outer wall surface of the metal heat conducting element.

[0019] As an optional solution for the temperature measuring catheter, the surface of the catheter body and / or the metal heat-conducting element is provided with an anti-coagulation coating.

[0020] As an optional solution for the temperature measuring catheter, a bottom layer is provided between the surface of the catheter body and / or the metal heat-conducting element and the anti-coagulation coating.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The temperature measuring catheter provided by the utility model sets a metal heat conducting element on the catheter body, and the metal heat conducting element is embedded and sealed with the opening at the distal end of the catheter body, so that the metal heat conducting element is sealed at the distal end of the temperature measuring channel, ensuring the sealing of the temperature measuring catheter and isolating blood from penetrating into the catheter body. The temperature measuring element located in the catheter body is connected or abutted with the metal heat conducting element, and the material property of the metal material having a more excellent thermal conductivity is utilized. When the temperature measuring catheter is inserted into the vein, the surface temperature of the metal heat conducting element in contact with the blood is consistent with the temperature of the surface of the metal heat conducting element in contact with the temperature measuring element. Compared with the non-metallic polymer encapsulated temperature measuring element, the utility model improves the sensitivity and accuracy of the temperature measuring element, ensures accurate detection of the temperature in the human tissue, and makes the temperature measurement accuracy meet the requirements of intracranial temperature measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the overall structure of the temperature measuring conduit in the embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure in which the proximal end of the metal heat-conducting element in the temperature measuring catheter in the embodiment of the utility model is hemispherical;

[0026] Figure 3 This is a structural schematic diagram of a truncated structure at the proximal end of a metal heat-conducting element in a temperature measuring catheter in an embodiment of the utility model.

[0027] Reference numerals:

[0028] 1. Catheter body; 11. Temperature measuring channel; 2. Metal heat-conducting element; 21. Card-joining groove; 3. Temperature measuring element; 4. Adhesive; 5. Wire; 6. Development ring; 7. Sealing ring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In order to improve the sensitivity and accuracy of the temperature measuring element and ensure accurate detection of the temperature in human tissue, so that the temperature measurement accuracy meets the requirements of intracranial temperature measurement, this embodiment provides a temperature measuring catheter, which is combined with the following Figures 1 to 3 The specific contents of this embodiment are described in detail.

[0034] like Figure 1 As shown, the temperature measuring catheter in this embodiment includes a catheter body 1, a metal heat-conducting element 2 and a temperature measuring unit. A temperature measuring channel 11 is provided in the catheter body 1. The metal heat-conducting element 2 is embedded in the opening at the distal end of the catheter body 1 and is sealed with the catheter body 1, and the metal heat-conducting element 2 is blocked at the distal end of the temperature measuring channel 11. The temperature measuring unit is arranged in the catheter body 1, and the temperature measuring unit includes a temperature measuring element 3, and the temperature measuring element 3 is connected or abutted with the proximal end of the metal heat-conducting element 2.

[0035] In short, the temperature measuring catheter provided by the utility model sets the metal heat conductive element 2 on the catheter body 1, and the metal heat conductive element 2 is embedded and sealed with the opening at the distal end of the catheter body 1, so that the metal heat conductive element 2 is blocked at the distal end of the temperature measuring channel 11. The traditional means use thicker glue for sealing, which is easy to cause inaccurate temperature measurement. The metal heat conductive element 2 in this embodiment cooperates with the distal opening of the catheter body 1, thereby sealing the distal end of the catheter body 1, ensuring the sealing of the temperature measuring catheter and the accuracy of temperature measurement, and isolating blood from penetrating into the catheter body 1. The temperature measuring element 3 located in the catheter body 1 is connected or abutted with the metal heat conductive element 2, and the material property of the metal material having a more excellent thermal conductivity is utilized. When the temperature measuring catheter is inserted into the vein, the surface temperature of the metal heat conductive element 2 in contact with the blood is consistent with the temperature of the surface of the metal heat conductive element 2 in contact with the temperature measuring element 3. Compared with the non-metallic polymer encapsulated temperature measuring element 3, the utility model improves the sensitivity and accuracy of the temperature measuring element 3, ensures accurate detection of the temperature in the human tissue, and makes the temperature measurement accuracy meet the requirements of intracranial temperature measurement.

[0036] Exemplarily, the metal heat-conducting element 2 may be made of, but not limited to, 304 stainless steel, gold, silver or other metal materials, which not only has a more excellent thermal conductivity, but also can seal the opening at the distal end of the catheter body 1 .

[0037] Exemplarily, the distal end of the metal heat-conducting element 2 is in a hemispherical structure. The distal end of the metal heat-conducting element 2 is located outside the temperature measuring catheter. Since the hemispherical structure is located at the distal end of the metal heat-conducting element 2, on the one hand, it helps to increase the contact area between the metal heat-conducting element 2 and the blood, thereby ensuring uniform heat conduction of the metal heat-conducting element 2, and further ensuring accurate temperature measurement; on the other hand, the smooth surface of the spherical surface can avoid damaging the tissue when the temperature measuring catheter is passed into the human tissue, reducing the risk of secondary injury.

[0038] The proximal end of the metal heat-conducting element 2 can be in any shape, but it is necessary to ensure that the temperature measuring element 3 is easily fixed to the metal heat-conducting element 2. Optionally, the proximal end of the metal heat-conducting element 2 in this embodiment is in a hemispherical structure or a truncated surface structure, and the temperature measuring element 3 is directly fixedly connected to the proximal end of the metal heat-conducting element 2. After the metal heat-conducting element 2 comes into contact with the blood, the temperature of the blood is quickly and accurately transmitted to the temperature measuring element 3 through the metal heat-conducting element 2, thereby accelerating the temperature measurement efficiency of the temperature measuring catheter. Specifically, Figure 1 and Figure 2 As shown, the proximal end of the metal heat-conducting element 2 is a hemispherical structure (i.e., an arc-shaped shell structure). Figure 3 As shown, the proximal end of the metal heat-conducting element 2 is in a truncated surface structure (ie, a planar shell structure).

[0039] Alternatively, if Figures 1 to 3 As shown, a sealing ring 7 is provided between the inner wall surface of the catheter body 1 and the outer wall surface of the metal heat-conducting element 2. The metal heat-conducting element 2 in this embodiment is engaged with the opening of the catheter body 1. By adding a sealing ring 7 at the engagement point between the metal heat-conducting element 2 and the opening of the catheter body 1, the sealing between the two is further ensured to prevent blood from flowing into the catheter body 1 through the gap. Exemplarily, the sealing ring 7 can be formed by welding or by using UV glue.

[0040] Alternatively, if Figure 1 and Figure 3 As shown, the proximal end of the metal heat conducting element 2 is provided with a clamping groove 21, and the temperature measuring element 3 is embedded in the clamping groove 21. By adding the clamping groove 21, it is not only convenient to install the temperature measuring element 3 to the proximal end of the metal heat conducting element 2, but also can ensure that the temperature measuring element 3 is not exposed.

[0041] Furthermore, the temperature measuring element 3 includes a thermocouple, and an adhesive 4 is filled between the temperature measuring element 3 and the inner wall of the clamping groove 21. The temperature measuring element 3 is placed in the clamping groove 21, and the connection stability between the temperature measuring element 3 and the metal thermal conductive element 2 is further improved by filling the adhesive 4 in the clamping groove 21.

[0042] Furthermore, the temperature measuring unit further includes a wire 5, the distal end of the wire 5 is electrically connected to the temperature measuring element 3, and the proximal end of the wire 5 is inserted into the catheter body 1. In actual use, the proximal end of the wire 5 can be connected to a related instrument to transmit temperature data to a display screen, so as to display the temperature accurately in real time.

[0043] Furthermore, the distal end of the catheter body 1 is provided with a developing ring 6. When the temperature measuring catheter is inserted into the human body, the developing ring 6 is added to facilitate real-time detection of the position of the catheter body 1 in the human body, and to facilitate guiding the operator to place the temperature measuring catheter in the set position for temperature measurement.

[0044] Furthermore, considering that interventional medical devices are in the state of exogenous substances when in contact with the biological environment, different degrees of coagulation phenomena will occur. In actual clinical practice, the temperature measuring catheter needs to be left in the blood vessel for 1-7 days, which is very likely to cause secondary surface thrombosis and lead to serious complications such as pulmonary embolism. In this embodiment, an anticoagulant coating is provided on the surface of the catheter body 1 and / or the metal heat conductive element 2. The anticoagulant coating includes various anticoagulants commonly used in the art, which may be but not limited to heparin, hirudin, etc.

[0045] Preferably, a bottom layer is provided between the surface of the catheter body 1 and / or the metal heat-conducting element 2 and the anticoagulation coating. The material of the bottom layer includes synthetic polymer materials and natural polymer materials, wherein the synthetic polymer materials include polyurethane, silica gel and other silicone polymers, organic glass, nylon, polyester, polytetrafluoroethylene, silicone rubber, polyester fiber, polyvinyl pyrrolidone, polyetheretherketone, polymethyl methacrylate, polyvinyl alcohol, polylactic acid, polyethylene, etc.; natural polymer materials include chitosan, collagen, silk fibroin, cellulose, etc. By adding a bottom layer to the surface of the catheter body 1 and the metal heat-conducting element 2 and performing pretreatment, it is convenient to increase the bonding force of the subsequent anticoagulation coating.

[0046] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A temperature measuring catheter, characterized in that: include: A catheter body (1) is provided with a temperature measuring channel (11); A metal heat-conducting element (2) is embedded in the opening at the distal end of the catheter body (1) and is sealed to the catheter body (1), and the metal heat-conducting element (2) is sealed at the distal end of the temperature measuring channel (11); A temperature measuring unit is arranged in the catheter body (1), and comprises a temperature measuring element (3). The temperature measuring element (3) is connected to or abuts against the proximal end of the metal heat conducting element (2).

2. The temperature measuring catheter according to claim 1, characterized in that: The distal end of the metal heat-conducting element (2) is in a hemispherical structure.

3. The temperature measuring catheter according to claim 2, characterized in that: The proximal end of the metal heat-conducting element (2) is in a hemispherical structure or a truncated surface structure, and the temperature measuring element (3) is fixedly connected to the proximal end of the metal heat-conducting element (2).

4. The temperature measuring catheter according to claim 3, characterized in that: A clamping groove (21) is provided at the proximal end of the metal heat-conducting element (2), and the temperature measuring element (3) is embedded in the clamping groove (21).

5. The temperature measuring catheter according to claim 4, characterized in that: The temperature measuring element (3) comprises a thermocouple, and an adhesive (4) is filled between the temperature measuring element (3) and the inner wall of the clamping groove (21).

6. The temperature measuring catheter according to claim 1, characterized in that: The temperature measuring unit further comprises a conductive wire (5), the distal end of the conductive wire (5) being electrically connected to the temperature measuring element (3), and the proximal end of the conductive wire (5) being inserted into the catheter body (1).

7. The temperature measuring catheter according to claim 1, characterized in that: The distal end of the catheter body (1) is provided with a developing ring (6).

8. The temperature measuring catheter according to claim 1, characterized in that: A sealing ring (7) is provided between the inner wall surface of the conduit body (1) and the outer wall surface of the metal heat-conducting element (2).

9. The temperature measuring catheter according to any one of claims 1 to 8, characterized in that: The surface of the catheter body (1) and / or the metal heat-conducting element (2) is provided with an anti-coagulation coating.

10. The temperature measuring catheter according to claim 9, characterized in that: A bottom layer is provided between the surface of the catheter body (1) and / or the metal heat-conducting element (2) and the anti-coagulation coating.

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