Mounting structure of temperature and pressure sensor of minimally invasive surgical instrument

Abstract

The utility model provides an installation structure of a temperature and pressure sensor of a minimally invasive surgical instrument. Comprising a pilot assembly head of a minimally invasive surgical instrument, a temperature and pressure sensor and a protection tube, the temperature and pressure sensor is sleeved with the protection tube, at least one first induction hole is formed in the position, corresponding to the induction position of the temperature and pressure sensor, of the side wall of the protection tube, and glue is filled between the temperature and pressure sensor and the inner wall of the protection tube; the end of the pilot assembly head is provided with an assembly hole allowing the protection tube to be inserted therein, the side wall of the pilot assembly head is provided with a second induction hole communicated with the assembly hole, and the second induction hole of the pilot assembly head and the first induction hole of the protection tube jointly form an induction channel. According to the installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument, the temperature and pressure sensor and the protection tube are of a pre-packaging structure, then the temperature and pressure sensor and the protection tube are installed in the pilot assembly head together, the installation structure enables the temperature and pressure sensor and glue to be installed after parameter calibration, and the overall procedure is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, and in particular to an installation structure of a temperature and pressure sensor of a minimally invasive surgical instrument. Background Art

[0002] With the continuous development of medical technology, minimally invasive surgery has become an important treatment method in modern medicine. In minimally invasive surgery, doctors perform surgical operations through tiny incisions, reducing trauma and pain to patients. Minimally invasive surgical instruments are important tools in the surgical process, and their performance and stability directly affect the surgical effect. Therefore, it is of great significance to accurately control and monitor minimally invasive surgical instruments.

[0003] In minimally invasive surgery, temperature and pressure measurement sensors are used to monitor the contact pressure between surgical instruments and body fluids or blood in real time. When the external temperature and pressure change, the resistance value in the sensing chip will change and be converted into an electrical signal, which is transmitted to the free control circuit of the minimally invasive surgical instrument through the signal transmission line, which helps doctors understand the status of the surgical instrument in the body so as to adjust the surgical operation in time. However, the existing minimally invasive surgical instrument temperature and pressure sensor installation structure directly seals the temperature and pressure measurement sensor in the pilot assembly head, but the existing structure has the following problems:

[0004] 1) The existing temperature and pressure measurement sensor is directly glued into the pilot assembly head of the minimally invasive surgical instrument, and the parameters need to be calibrated with the pilot assembly head and glue, making the overall procedure cumbersome.

[0005] 2) When the temperature and pressure measuring sensor needs to be replaced, the pilot assembly head and the temperature and pressure measuring sensor must be replaced together, which will affect other components in the pilot assembly head.

[0006] 3) During minimally invasive surgery, gravel or foreign matter may splash out, which may cause scratches or damage to the surface of the glue. At this time, the measurement accuracy of the sensor will decrease, thereby affecting the measurement accuracy of temperature and pressure. Utility Model Content

[0007] The purpose of the utility model is to provide a mounting structure for a temperature and pressure sensor of a minimally invasive surgical instrument to solve the problems raised in the above background technology:

[0008] (1) How to optimize the assembly method of the existing temperature and pressure sensor to facilitate subsequent replacement.

[0009] (2) How to protect the surface of the glue so that the cured glue is not easily scratched or damaged, thereby protecting the measurement accuracy of the sensor.

[0010] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0011] A mounting structure for a temperature and pressure sensor of a minimally invasive surgical instrument;

[0012] It includes a pilot assembly head of a minimally invasive surgical instrument, a temperature and pressure sensor and a protection tube, wherein the temperature and pressure sensor is mounted in the protection tube, at least one first sensing hole is opened at a position on the side wall of the protection tube corresponding to the sensing part of the temperature and pressure sensor, and the space between the temperature and pressure sensor and the inner wall of the protection tube is filled with glue;

[0013] The end of the pilot assembly head is provided with an assembly hole for inserting the protection tube, and the side wall of the pilot assembly head is provided with a second sensing hole communicating with the assembly hole. The second sensing hole of the pilot assembly head and the first sensing hole of the protection tube together constitute a sensing channel.

[0014] On the basis of the above technical solution, the present invention can also be improved as follows.

[0015] Furthermore, the outer wall of the protection tube is fixedly connected to the pilot assembly head.

[0016] Furthermore, a radial projection of the second sensing hole of the pilot assembly head on the side wall of the protection tube partially overlaps with the first sensing hole.

[0017] Furthermore, the radial projection of the second sensing hole of the pilot assembly head on the side wall of the protection tube completely overlaps with the first sensing hole.

[0018] Furthermore, the radial projection of the second sensing hole of the pilot assembly head on the side wall of the protection tube does not overlap with the first sensing hole at all.

[0019] Furthermore, the temperature and pressure sensor includes a temperature and pressure sensing chip, a signal transmission line and an insulating diaphragm. The temperature and pressure sensing chip and the insulating diaphragm are in the glue in the protective tube, and the signal transmission line extends out of the glue in the protective tube and is connected to the external circuit.

[0020] Furthermore, a first sensing hole is opened on the side wall of the protection tube at a position corresponding to the sensing part of the temperature and pressure sensor, and the area of ​​the first sensing hole is greater than or equal to the area of ​​the insulating diaphragm.

[0021] Furthermore, a plurality of first sensing holes are opened at positions of the side wall of the protection tube corresponding to the sensing parts of the temperature and pressure sensors. The plurality of first sensing holes are evenly distributed along the circumference direction of the protection tube and evenly extend along the axial direction.

[0022] Furthermore, the glue is medical grade silicone.

[0023] The installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument of the utility model has the following advantages:

[0024] 1) The temperature and pressure sensor and the protection tube adopt a pre-packaged structure, and then the temperature and pressure sensor connected to the protection tube are installed together in the pilot assembly head. This installation structure allows the temperature and pressure sensor and glue to be calibrated before installation, simplifying the overall procedure.

[0025] 2) When the temperature and pressure measuring sensor needs to be replaced, only the temperature and pressure sensor and the protection tube need to be replaced together without affecting other components in the pilot assembly head.

[0026] 3) By filling the gap between the temperature and pressure sensor and the inner wall of the protection tube with glue, the temperature and pressure sensor is fixed and the pressure transmission with the external environment is achieved, which improves the installation stability and sensing sensitivity.

[0027] 4) During minimally invasive surgery, gravel or foreign matter may splash out, which may cause scratches or damage to the surface of the glue. The position of the second sensing hole on the side wall of the pilot assembly head can avoid direct impact from gravel or foreign matter, ensuring the measurement accuracy of temperature and pressure.

[0028] 5) The protection tube and the pilot assembly head are fixedly connected by bonding, so they are firmly installed and not easy to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is one of the three-dimensional views of the first embodiment of the installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument.

[0030] Figure 2 This is the second stereoscopic diagram of the first embodiment of the installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument (the pilot assembly head is omitted in the figure).

[0031] Figure 3 It is a stereoscopic diagram of the temperature and pressure sensor in Embodiment 1 of the installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument.

[0032] Figure 4 It is a stereoscopic diagram of the protection tube in the second embodiment of the installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument.

[0033] Description of the numbers in the figure:

[0034] Temperature and pressure sensor-100; temperature and pressure sensing chip-110; signal transmission line-120; insulating diaphragm-130; protection tube-200; first sensing hole-210; pilot assembly head-400; assembly hole-420; second sensing hole-410. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0036] The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementations.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] Explanation of coincidence: When two or more plane geometric figures have common parts, they are called coincidence. Generally, if you want to distinguish between complete coincidence and partial coincidence, you can specify whether it is partial coincidence or complete coincidence. For example: when the projection of A completely overlaps with the hole of B, that is, the projection of A and the hole of B are the same size and shape, and they completely match, or the hole of B is completely located in the projection of A, or the projection of A is completely located in the hole of B, it is complete coincidence; when the projection of A and the hole of B only partially overlap, it is partial coincidence; the projection of A and the hole of B do not overlap at all, which is complete non-coincidence. For example, when the projection of A is located between the holes of B and C, and there is no overlapping part with the two holes, the projection of A does not overlap with the holes of B and C at all.

[0039] Embodiment 1

[0040] See also Figures 1 to 3 .

[0041] The installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument includes a pilot assembly head 400 of the minimally invasive surgical instrument, a temperature and pressure sensor 100 and a protection tube 200 .

[0042] The temperature and pressure sensor 100 is a mature product purchased from outside. The temperature and pressure sensor 100 is specifically a temperature and / or pressure sensor. The temperature and pressure sensor 100 is mounted in a protective tube 200. The temperature and pressure sensor 100 includes a temperature and pressure sensing chip 110, a signal transmission line 120 and an insulating diaphragm 130. A first sensing hole 210 is opened on the side wall of the protective tube 200 corresponding to the position of the temperature and pressure sensor 100. A first sensing hole 210 is opened on the side wall of the protective tube 200 corresponding to the position of the temperature and pressure sensor 100. The area of ​​the first sensing hole 210 is greater than (or equal to) the area of ​​the insulating diaphragm 130.

[0043] The temperature and pressure sensor 100 and the inner wall of the protective tube 200 are filled with glue, and medical grade silicone can be used as the glue (polyurethane glue, epoxy resin glue and other glues can also achieve the technical effect of this embodiment. These glues usually have good biocompatibility, will not cause harm to the human body, and can meet the requirements of medical devices during cleaning, disinfection and reuse). In order to ensure a good sealing effect, the glue filling process is also very critical. It is necessary to control the amount, distribution and curing conditions of the glue to ensure that the gap between the sensor and the assembly shell is completely filled, and the glue can be evenly cured to form a firm sealing layer.

[0044] The temperature and pressure sensing chip 110 and the insulating diaphragm 130 are in the glue inside the protective tube 200, and the signal transmission line 120 extends out of the glue inside the protective tube 200 and is connected to the external circuit (the external circuit is the control circuit of the minimally invasive surgical instrument itself, and the external circuit can receive and process the signal sent back by the temperature and pressure sensor 100).

[0045] An assembly hole 420 for inserting the protective tube 200 is provided at the end of the pilot assembly head 400, one side of the assembly hole 420 extends to the rear end face of the pilot assembly head 400, and the other side of the assembly hole 420 terminates inside the pilot assembly head 400 (the other side of the assembly hole 420 may also extend to the front end face of the pilot assembly head 400, that is, open at the front end face), the protective tube 200 extends into the assembly hole 420, and the outer wall of the protective tube 200 and the pilot assembly head 400 are fixedly connected (for example, by bonding) to ensure that the protective tube 200 and the tail of the pilot assembly head 400 are sealed to prevent blood or body fluids from seeping into the interior of the minimally invasive surgical instrument from the assembly hole 420.

[0046] The side wall of the pilot assembly head 400 is provided with a second sensing hole 410 communicating with the assembly hole 420. The second sensing hole 410 of the pilot assembly head 400 and the first sensing hole 210 of the protection tube 200 together constitute a sensing channel. The projection of the second sensing hole 410 of the pilot assembly head 400 on the side wall of the protection tube 200 partially overlaps with the first sensing hole 210. After the pilot assembly head 400 is inserted into the minimally invasive incision, body fluid or blood contacts the glue in the protection tube 200 through the sensing channel. In reality, air may be trapped in the body fluid, and the air contacts the glue. Although pressure can be transmitted, the temperature may be delayed, but it can still be transmitted.

[0047] The head end of the temperature and pressure sensor 100 is flush with or built-in with the head end of the protection tube 200, and then glue is filled until it reaches the end of the temperature and pressure sensing chip 110. Then the parameters are calibrated. When in use, the temperature and pressure sensor 100 after glue filling is connected to the protection tube 200 and installed in the pilot assembly head 400. There is no need to fill it with glue. It only needs to be fixed by dispensing glue between the end of the pilot assembly head 400 and the protection tube 200.

[0048] And because the projection of the second sensing hole 410 of the pilot assembly head 400 on the side wall of the protective tube 200 partially overlaps with the first sensing hole 210, it can prevent the splash of gravel or foreign matter caused by the use of minimally invasive surgical instruments from damaging the glue surface, and the glue surface is not easily scratched or damaged, thereby ensuring the measurement of temperature and / or pressure.

[0049] Embodiment 2

[0050] See also Figure 4 .

[0051] The only difference between this embodiment and the first embodiment is that in this embodiment, a plurality of first sensing holes 210 are opened on the side wall of the protection tube 200 corresponding to the positions of the temperature and pressure sensors, and the plurality of first sensing holes 210 are evenly distributed along the circumference direction of the protection tube 200 and evenly extend along the axial direction.

[0052] The second sensing hole of the pilot assembly head and part of the first sensing hole 210 of the protection tube together form a sensing channel. This embodiment can achieve the same technical effect as the first embodiment.

[0053] The above are only two implementation modes of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the principle of the present invention, and these should also be regarded as belonging to the protection scope of the present invention.

Claims

1. A mounting structure for a temperature and pressure sensor of a minimally invasive surgical instrument, characterized by: The invention comprises a pilot assembly head (400) of a minimally invasive surgical instrument, a temperature and pressure sensor (100) and a protective tube (200); the temperature and pressure sensor (100) is sleeved in the protective tube (200); at least one first sensing hole (210) is opened at a position of a side wall of the protective tube (200) corresponding to a sensing part of the temperature and pressure sensor (100); and glue is used to fill the space between the temperature and pressure sensor (100) and the inner wall of the protective tube (200); An assembly hole (420) for inserting the protective tube (200) is provided at the end of the pilot assembly head (400), a second sensing hole (410) communicating with the assembly hole (420) is opened on the side wall of the pilot assembly head (400), and the second sensing hole (410) of the pilot assembly head (400) and the first sensing hole (210) of the protective tube (200) together constitute a sensing channel.

2. The installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument according to claim 1 is characterized by: The outer wall of the protection tube (200) is fixedly connected to the pilot assembly head (400).

3. The installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument according to claim 1 is characterized by: The radial projection of the second sensing hole (410) of the pilot assembly head (400) on the side wall of the protection tube (200) partially overlaps with the first sensing hole (210).

4. The installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument according to claim 1 is characterized by: The radial projection of the second sensing hole (410) of the pilot assembly head (400) on the side wall of the protection tube (200) completely overlaps with the first sensing hole (210).

5. The installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument according to claim 1 is characterized by: The radial projection of the second sensing hole (410) of the pilot assembly head (400) on the side wall of the protection tube (200) does not completely overlap with the first sensing hole (210).

6. The installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument according to claim 1 is characterized by: The temperature and pressure sensor (100) comprises a temperature and pressure sensing chip (110), a signal transmission line (120) and an insulating diaphragm (130); the temperature and pressure sensing chip (110) and the insulating diaphragm (130) are in glue in a protective tube (200), and the signal transmission line (120) extends out of the glue in the protective tube (200) to be connected to an external circuit.

7. The installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument according to claim 6 is characterized by: A first sensing hole (210) is opened at a position of the side wall of the protection tube (200) corresponding to the sensing part of the temperature and pressure sensor (100), and the area of ​​the first sensing hole (210) is greater than or equal to the area of ​​the insulating diaphragm (130).

8. The installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument according to claim 6 is characterized by: A plurality of first sensing holes (210) are formed on the side wall of the protection tube (200) at positions corresponding to sensing locations of the temperature and pressure sensor (100). The plurality of first sensing holes (210) are evenly distributed along the circumference of the protection tube (200) and evenly extend along the axial direction.

9. The installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument according to claim 1 is characterized by: The glue is medical grade silicone.

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