Intelligent deep vein indwelling catheter fixing device and infusion method

Abstract

The invention provides an intelligent deep vein indwelling catheter fixing device and an infusion method, and belongs to the field of deep vein indwelling catheters.The intelligent deep vein indwelling catheter fixing device comprises a shell, a limiting partition plate is arranged in the shell, a lower clamping plate is arranged on the upper surface of the shell, and a bimetallic strip set is mounted at the inner bottom of the shell through a first mounting rod; an ejector rod is arranged in the middle of the upper end of the bimetallic strip set, and the upper end of the ejector rod penetrates through the limiting partition plate and is in transmission connection with an upper clamping plate through a self-locking transmission mechanism. By means of the bimetallic strip set, when the body temperature of a patient with a fever is higher than 38 DEG C, the ejector rod is pushed to move upwards, the ejector rod drives the upper clamping plate to move upwards by a small distance through the self-locking transmission mechanism, and the pressure between the upper clamping plate and the lower clamping plate is reduced; therefore, the upper clamping plate and the lower clamping plate do not lose the clamping and fixing effect on the catheter, the risk of'loosening, namely falling 'is eradicated, and the situation that a patient is bruised due to the fact that too large pressure is applied to the catheter is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of deep vein catheterization, and specifically relates to an intelligent deep vein catheterization fixing device and an infusion method. Background Art

[0002] A deep vein catheterization fixation device is a medical device specially designed for fixing deep vein catheters. A deep vein catheterization fixation device is usually composed of multiple components, including but not limited to a load-bearing component, a fixing component, etc. These components work together to ensure that the deep vein catheter can be stably fixed in the patient's body to avoid displacement or falling off. It usually includes a box body for accommodating and supporting the deep vein catheter. The box body may have a transparent cover so that medical staff can observe the catheterization without opening the device. It includes fixings for fixing the catheter and butterfly wings. Some new deep vein catheterization fixation devices use decompression pads, silicone pads and other designs to improve patient comfort and reduce skin irritation caused by the catheter.

[0003] Most existing catheter fixing devices are rigid fixing structures. After the catheter is fixed, the catheter cannot move slightly. As a result, when the patient has a fever and swelling, the body temperature rises but the skin pressure cannot be automatically released, causing the patient's skin to exert pressure on the catheter, which can easily cause the catheter to fall off or the patient's skin tissue to be greatly compressed. Excessive pressure can easily be generated at the swollen area, causing pressure sores and other problems, causing secondary injuries to the patient. In addition, the rigid fixing structure cannot flexibly adjust the clamping force, and the patient may be crushed due to excessive force, or the catheter may fall off due to insufficient force.

[0004] Therefore, we propose an intelligent deep vein catheterization fixation device and infusion method to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem that most existing catheter fixing devices are rigid fixing structures. After the catheter is fixed, the catheter cannot move slightly, causing the patient to have a fever and swelling, the body temperature rises but the skin pressure cannot be automatically released, causing the patient's skin to exert pressure on the catheter, which can easily cause the catheter to fall off or the patient's skin tissue to be subjected to greater compression, easily generating excessive pressure at the swollen area, causing pressure sores and other problems, causing secondary injuries to the patient, and the rigid fixing structure cannot flexibly adjust the clamping force, either causing the patient to be crushed due to excessive force, or causing the catheter to fall off due to insufficient force. Therefore, an intelligent deep vein catheterization fixing device and infusion method are proposed.

[0006] The purpose of the present invention can be achieved through the following technical solutions: it includes a shell, a limiting partition is provided inside the shell, a lower splint is provided on the upper surface of the shell, a bimetallic plate group is installed on the inner bottom of the shell through a mounting rod, and the bimetallic plate group is pre-pressed into an arc-shaped convex surface facing upward at room temperature, and a push rod is provided in the middle of the upper end of the bimetallic plate group, the upper end of the push rod passes through the limiting partition and is connected to the upper splint through a self-locking transmission mechanism, so that when the patient has a fever of ≥38°C, the push rod drives the upper splint to move upward through the self-locking transmission mechanism, reducing the pressure between the upper splint and the lower splint, the upper end of the push rod is connected to the titanium alloy lamination through a reeling and winding mechanism, and the titanium alloy lamination is movably installed on the inner bottom of the shell through a mounting rod.

[0007] As a preferred embodiment of the present invention, the bimetallic sheet group is composed of an outer layer of brass and an inner layer of invar. When the body temperature is ≥38°C, the bimetallic sheet group instantly flips to a concave surface, pushing the top rod upward.

[0008] As a preferred embodiment of the present invention, the self-locking transmission mechanism includes a lifting plate, and the middle of the lifting plate is fixedly installed on the upper surface of the top rod, and tooth plates 1 are provided at both ends of the left and right sides of the lifting plate, and the side walls of the two tooth plates 1 are meshed and connected with spur gear 1, and the other sides of the two spur gears 1 are respectively meshed and connected with spur gear 2, and the other sides of the two spur gears 2 are respectively meshed and connected with tooth plates 2, and the upper ends of the two tooth plates 2 pass through the upper end of the shell and are fixedly connected to the left and right sides of the upper splint respectively.

[0009] As a preferred embodiment of the present invention, the two spur gears 1 and the two spur gears 2 are both rotatably installed inside the shell through a rotating rod 1, and the tooth plate 2 is L-shaped, and the side walls of the two tooth plates 2 do not contact the left and right sides of the lower splint.

[0010] As a preferred embodiment of the present invention, the rewinding and unwinding mechanism includes a tooth plate three, and the tooth plate three is symmetrically arranged in two groups. The two groups of tooth plates three are respectively arranged on the front and rear sides of the upper end of the top rod, and the outer sides of the two tooth plates three are meshed and connected with spur gears three. The middle of the two spur gears three is provided with a rotating rod two, and the rotating rod two is rotatably installed inside the shell. The circumferential surfaces of the two rotating rods two are provided with winding disks, and the surfaces of the two winding disks are respectively connected to the front and rear ends of the upper surface of the titanium alloy laminate through cables.

[0011] As a preferred embodiment of the present invention, the titanium alloy laminate array is provided with twelve, and the twelve titanium alloy laminates are connected by micro torsion springs. The lower surfaces of the twelve titanium alloy laminates are provided with thermal expansion particles. When the reeling and winding mechanism is working, the twelve titanium alloy laminates are driven to gather together, and at the same time the thermal expansion particles expand to fill the gaps between the laminates to enhance the fit with the patient's skin.

[0012] As a preferred embodiment of the present invention, a second mounting rod is provided on both the front and rear sides of the lower end of the shell, and the front and rear ends of the twelve titanium alloy laminations are movably mounted on the circumferential surface of the second mounting rod.

[0013] As a preferred embodiment of the present invention, the upper splint is arranged directly above the lower splint, and arc grooves are provided in the middle of the upper splint and the lower splint, and a catheter is clamped and fixed between the upper splint and the lower splint through the arc grooves.

[0014] As a preferred embodiment of the present invention, the arc-shaped grooves of the upper and lower splints are provided with unidirectional fish-scale micro-teeth, the unidirectional fish-scale micro-teeth having a tooth height of 0.1 mm and an inclination angle of 60°.

[0015] As a preferred embodiment of the present invention, an intelligent deep vein catheterization and infusion method specifically includes the following steps:

[0016] Step 1: Disinfect the puncture site three times with iodine, lay a sterile drape, and the operator wears sterile gloves;

[0017] Step 2: Put the probe on a sterile protective cover, observe the direction of the blood vessels in real time, and insert the puncture needle at a 30°-45° angle to the skin;

[0018] Step 3: Remove the puncture needle, insert the dilator along the guide wire to expand the subcutaneous tissue, and then replace it with the catheter;

[0019] Step 4: Clamp and fix the catheter between the upper and lower splints, then place the side of the shell with the bimetallic sheet group in contact with the patient's skin, and then fix the shell with a transparent dressing so that the catheter can perform infusion on the patient.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) When the patient's fever temperature is higher than 38°C, the bimetallic plate group can push the top rod upward, so that the self-locking transmission mechanism drives the upper splint to move a short distance upward, thereby reducing the pressure between the upper and lower splints. At the same time, the fish-scale micro-teeth provided inside the upper and lower splints prevent the upper and lower splints from losing their clamping effect on the catheter, eliminating the risk of "loosening or falling off" and avoiding excessive pressure on the catheter that may cause injury to the patient.

[0022] (2) The titanium alloy laminates are arranged to adjust the state of the titanium alloy laminates after the patient's body temperature changes, so that the titanium alloy laminates gather into an arch shape. At the same time, the volume of the thermal expansion particles expands, automatically filling the gaps created by the gathered laminates, thereby avoiding compression injuries caused by swelling.

[0023] (3) The arrangement of micro torsion springs between the titanium alloy laminations can restore the bimetallic strips to their initial state after the patient's fever subsides and the body temperature returns to normal, so that the top rod is reset and the reel unwinds the cable. At the same time, the elastic force of the micro torsion springs is released, pushing the titanium alloy laminations back to a vertical state. The thermal expansion particles shrink to their initial state, so that the titanium alloy laminations will not cause pressure sores on the patient, thus achieving dynamic self-adjustment of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 It is a front cutaway perspective view of the present invention;

[0027] Figure 3 It is a right side perspective view of the present invention.

[0028] In the figure: 1. Shell; 2. Limiting partition; 3. Mounting rod 1; 4. Bimetallic plate group; 5. Push rod; 6. Self-locking transmission mechanism; 601. Lifting plate; 602. Tooth plate 1; 603. Spur gear 1; 604. Spur gear 2; 605. Turning rod 1; 606. Tooth plate 2; 7. Rewinding and unwinding mechanism; 701. Tooth plate 3; 702. Spur gear 3; 703. Turning rod 2; 704. Rewinding disk; 705. Cable; 8. Upper splint; 9. Lower splint; 10. Mounting rod 2; 11. Titanium alloy lamination; 12. Micro torsion spring; 13. Thermal expansion rubber particles; 14. One-way fish-scale micro-teeth. DETAILED DESCRIPTION

[0029] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features being referred to. Thus, features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the context of this disclosure, "a group" means two or more, unless otherwise specifically defined.

[0031] Throughout this specification, when a device is said to be "connected" to another device, this includes not only "direct connection" but also "indirect connection" with other elements interposed therebetween. Furthermore, when a device is said to "include" a certain component, unless otherwise stated, this does not exclude the inclusion of other components but rather implies that the device may include other components.

[0032] Although the terms first, second, etc. are used in some examples herein to refer to various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first interface and a second interface, etc. are used. Furthermore, as used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context indicates otherwise.

[0033] Although not defined differently, all terms used herein, including technical and scientific terms, have the same meanings as those generally understood by those skilled in the art to which this disclosure belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with relevant technical literature and the current message. Unless otherwise defined, they should not be overly interpreted as ideal or highly formalized meanings.

[0034] Example 1:

[0035] See also Figure 1 - Figure 3 As shown, an intelligent deep vein catheter fixation device includes a housing 1, a limited spacer 2 is provided inside the housing 1, a lower clamping plate 9 is provided on the upper surface of the housing 1, and a bimetallic plate group 4 is mounted on the inner bottom of the housing 1 via a mounting rod 3. The bimetallic plate group 4 is pre-pressed into an arc-shaped state with the convex surface facing upward at room temperature, and a push rod 5 is provided in the middle of the upper end of the bimetallic plate group 4;

[0036] Existing catheter fixing devices are generally rigid fixing structures. After the catheter is fixed, the catheter cannot move slightly. As a result, when the patient has a fever and swelling, the body temperature rises and the skin pressure is automatically released, causing the patient's skin to exert pressure on the catheter, which can easily cause the catheter to fall off or the patient's skin tissue to be severely compressed, resulting in secondary injuries to the patient.

[0037] It should be noted that the bimetallic plate group 4 is composed of an outer layer of brass and an inner layer of Invar, wherein the deformation threshold of the bimetallic plate group 4 is set at 38°C. When the body temperature is ≥38°C, the bimetallic plate group 4 instantly flips into a concave surface, pushing the top rod 5 upward. The normal temperature is the patient's body temperature, usually 37°C and below, indicating that when the patient is in normal condition, the state of the bimetallic plate group 4 is a state with the upper arc-shaped convex surface facing upward. When the patient's body temperature is higher than 38°C, the brass and Invar composite composition instantly flips into a concave surface, making the middle of its bottom concave, so that the middle part of the bimetallic plate group 4 is pushed upward, and then the top rod 5 is slightly pushed upward a short distance, so that the fixing device can self-adjust through changes in the patient's body temperature.

[0038] The upper end of the push rod 5 passes through the limiting partition 2 and is connected to the upper splint 8 through the self-locking transmission mechanism 6. The self-locking transmission mechanism 6 includes a lifting plate 601, and the middle of the lifting plate 601 is fixedly installed on the upper surface of the push rod 5. The left and right ends of the lifting plate 601 are provided with a tooth plate 1 602. The side walls of the two tooth plates 1 602 are meshed with a spur gear 1 603. The other sides of the two spur gears 1 603 are respectively meshed with a spur gear 2 604. The other sides of the two spur gears 2 604 are meshed with a tooth plate 2 606. The upper ends of the two tooth plates 2 606 pass through the upper end of the shell 1 and are fixedly connected to the left and right sides of the upper splint 8 respectively. The setting of the spur gear 1 603 and the spur gear 2 604 enables the push rod 5 to drive the gear When plate 1 602 moves upward, the transmission of spur gear 1 603 and spur gear 2 604 enables tooth plate 2 606 to move upward synchronously, thereby driving the upper clamping plate 8 to move upward by the same amplitude as the push rod 5, increasing the space between the upper clamping plate 8 and the lower clamping plate 9, and reducing the pressure between the upper clamping plate 8 and the lower clamping plate 9. As a result, the upper clamping plate 8 and the lower clamping plate 9, which originally engaged the catheter with a pressure of 1.5N to prevent the catheter from slipping, are reduced to a force of 0.8N to engage the catheter, preventing the catheter from crushing the patient while still retaining the anti-slip function. In vitro mechanical testing (this is prior art and will not be described in detail), the catheter displacement under a pressure of 0.8N is less than 0.3mm (anti-slip threshold), and the tube wall deformation rate is ≤5% (anti-slip critical value).

[0039] The upper end of the top rod 5 is connected to the titanium alloy laminate 11 through the winding mechanism 7, and the titanium alloy laminate 11 is movably installed on the inner bottom of the shell 1 through the mounting rod 2 10. The winding mechanism 7 includes a tooth plate 3 701, and the tooth plate 3 701 is symmetrically arranged in two groups. The two groups of tooth plates 3 701 are respectively arranged on the front and rear sides of the upper end of the top rod 5. The outer sides of the two tooth plates 3 701 are meshed with spur gears 3 702, and the middle of the two spur gears 3 702 is provided with a rotating rod 2 703, and the second rotating rod 703 is rotatably installed inside the housing 1, and the circumferential surfaces of the two second rotating rods 703 are provided with winding disks 704, and the surfaces of the two winding disks 704 are respectively connected to the front and rear ends of the upper surface of the titanium alloy laminate 11 through cables 705, so that when the top rod 5 moves upward, it can drive the spur gear 3 702, the second rotating rod 703 and the winding disk 704 to rotate through the gear plate 3 701, so that the winding disk 704 reels the cable 705;

[0040] Existing devices typically secure the catheter to the patient via a rigid base. When a patient develops a fever, the wound site swells, causing the catheter to be lifted by the swollen tissue. This overloads the clamping mechanism, causing the catheter to deform, impacting its effectiveness, and also causing compression damage to the wound.

[0041] It should be noted that there are twelve titanium alloy laminations 11 in an array, and the twelve titanium alloy laminations 11 are connected by micro torsion springs 12. The twelve titanium alloy laminations 11 are arranged in an array so that there is space between them, which is convenient for subsequent tilting and movement. A reset spring is added at the micro torsion spring 12 to increase the elastic force of the micro torsion spring 12, so that the twelve titanium alloy laminations 11 can be in a vertical state when not subject to external force. The lower surfaces of the twelve titanium alloy laminations 11 are provided with thermal expansion particles 13, and the front and rear sides of the lower end of the shell 1 are provided with mounting rods 10. The front and rear ends of the twelve titanium alloy laminations 11 are movably mounted. On the circumferential surface of the mounting rod 10, at room temperature of the patient, an array of twelve titanium alloy laminates 11 are laid flat on the bottom of the shell 1, and at the same time, the thermal expansion particles 13 at the bottom of the twelve titanium alloy laminates 11 are not expanded and adhere to the patient's skin. When the patient's body temperature rises (such as when the risk of swelling increases due to fever), the top rod 5 inside the shell 1 drives the twelve titanium alloy laminates 11 to move closer to the middle through the reeling and unreeling mechanism 7, so that the twelve titanium alloy laminates 11 gather into an arch shape. At the same time, the volume of the thermal expansion particles 13 expands by more than 150% at 38°C, automatically filling the gaps created by the gathered laminates to avoid compressive injuries caused by swelling.

[0042] Preferably, the two spur gears 1 603 and the two spur gears 2 604 are rotatably installed inside the housing 1 through the rotating rod 1 605. The setting of the rotating rod 1 605 can limit the installation of the spur gears 1 603 and the spur gears 2 604 without affecting the rotation of the spur gears 1 603 and the spur gears 2 604. The tooth plate 2 606 is L-shaped. The side walls of the two tooth plates 2 606 do not contact the left and right sides of the lower splint 9, so that the tooth plate 2 606 will not contact the lower splint 9 when moving in the vertical direction, avoiding friction, so that the tooth plate 2 606 can move vertically smoothly and stably, and then stably drive the upper splint 8 to move vertically, avoiding shaking or deviation of the upper splint 8, affecting the bite effect of the upper splint 8 and the lower splint 9 on the catheter;

[0043] Preferably, the upper splint 8 is arranged just above the lower splint 9, and an arc groove is opened in the middle of the upper splint 8 and the lower splint 9. A conduit is clamped and fixed between the upper splint 8 and the lower splint 9 through the arc groove. The setting of the arc groove provides a placement space for the conduit, so that the conduit is smoothly installed on the upper splint 8 and the lower splint 9, and then the conduit is fixed to the housing 1 through the upper splint 8 and the lower splint 9.

[0044] Preferably, one-way fish-scale micro-teeth 14 are provided at the arc-shaped grooves of the upper splint 8 and the lower splint 9. The one-way fish-scale micro-teeth 14 have a tooth height of 0.1 mm and an inclination angle of 60°. The setting of the one-way fish-scale micro-teeth 14 enables the micro-teeth to "stand up" and embed into the tube wall when the catheter is pulled outward by force; when pushed inward, the micro-teeth "fall down" to reduce resistance, so that the upper splint 8 and the lower splint 9 can realize the self-locking function of the catheter, and when the patient has a fever, the upper splint 8 moves upward to reduce the pressure on the catheter, and the clamping and fixing effect of the upper splint 8 and the lower splint 9 on the catheter will not be lost, eliminating the risk of "loosening or falling off".

[0045] Example 2:

[0046] See also Figure 2 and Figure 3 As shown, the present invention also discloses an intelligent deep vein catheterization and infusion method, which specifically includes the following steps:

[0047] Step 1: Disinfect the puncture site three times with iodine, lay a sterile drape, and the operator wears sterile gloves;

[0048] Step 2: Put the probe on a sterile protective cover, observe the direction of the blood vessels in real time, and insert the puncture needle at a 30°-45° angle to the skin;

[0049] Step 3: Remove the puncture needle, insert the dilator along the guide wire to expand the subcutaneous tissue, and then replace it with the catheter;

[0050] Step 4: Clamp and fix the catheter between the upper splint 8 and the lower splint 9, then contact the side of the shell 1 with the bimetallic plate group 4 with the patient's skin, and then fix the shell 1 through a transparent dressing so that the catheter can perform infusion on the patient. When the shell 1 is adhered near the patient's wound through the transparent dressing, the bimetallic plate group 4 at the bottom of the shell 1 fits the patient's skin and can be automatically adjusted at any time. When the patient is at room temperature, the bimetallic plate group 4 is in a state with the upper arc-shaped convex surface facing upward, and at this time, the force of the upper splint 8 and the lower splint 9 clamping the catheter is 1.5N. At the same time, the titanium alloy laminations 11 array is vertically distributed inside the lower end of the shell 1 and fits the patient's skin;

[0051] When the patient has a fever, the bimetallic plate group 4 senses a temperature of ≥38°, and the bimetallic plate group 4 flips, causing the push rod 5 to move upward. The upward movement of the push rod 5 drives the lifting plate 601 and the tooth plate 1 602 to move upward. The upward movement of the tooth plate 1 602 drives the spur gear 1 603 and the spur gear 2 604 to rotate. The rotation of the spur gear 2 604 drives the tooth plate 2 606 and the upper clamping plate 8 to move a short distance upward, so that the clamping force of the upper clamping plate 8 and the lower clamping plate 9 on the catheter becomes 0.8N, so that the upper clamping plate 8 and the lower clamping plate 9 can still bite the catheter without causing the catheter to fall off.

[0052] At the same time, the upward movement of the top rod 5 also drives the gear plate 3 701 to move upward, so that the gear plate 3 701 drives the spur gear 3 702, the rotating rod 2 703 and the winding disk 704 to rotate, so that the winding disk 704 reels the cable 705, and then the twelve titanium alloy laminates 11 are moved closer to the center through the cable 705. The twelve titanium alloy laminates 11 are gathered into an arch shape. At the same time, the thermal expansion particles 13 expand by more than 150% at 38°C, automatically filling the gaps formed by the gathered laminates to avoid compression injuries caused by swelling.

[0053] After the patient's fever subsides and the body temperature returns to normal, the bimetallic plate group 4 returns to its initial state, causing the top rod 5 to move downward and reset, and then the upper splint 8 is driven downward and reset through the self-locking transmission mechanism 6, restoring the clamping force between the upper splint 8 and the lower splint 9, preventing the catheter from slipping and allowing the catheter to work normally. At the same time, the reel 704 unwinds the cable 705, releasing the elastic force of the micro torsion spring 12, pushing the twelve titanium alloy laminates 11 back to a vertical state, and the thermal expansion particles 13 shrink to their initial state, so that the titanium alloy laminates 11 do not cause pressure sores on the patient.

[0054] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An intelligent deep vein catheterization and fixing device, comprising a housing (1), a limiting partition (2) is provided inside the housing (1), and a lower splint (9) is provided on the upper surface of the housing (1), characterized in that: The inner bottom of the shell (1) is installed with a bimetallic plate group (4) through a mounting rod (3), and the bimetallic plate group (4) is pre-pressed into an arc-shaped convex surface facing upward at room temperature. A push rod (5) is provided in the middle of the upper end of the bimetallic plate group (4). The upper end of the push rod (5) passes through the limiting partition (2) and is connected to the upper splint (8) through a self-locking transmission mechanism (6). When the patient has a fever of ≥38°C, the push rod (5) drives the upper splint (8) to move upward through the self-locking transmission mechanism (6), reducing the pressure between the upper splint (8) and the lower splint (9). The upper end of the push rod (5) is connected to the titanium alloy laminate (11) through a reeling and unreeling mechanism (7), and the titanium alloy laminate (11) is movably installed on the inner bottom of the shell (1) through a mounting rod (10).

2. The intelligent deep vein catheterization and fixing device according to claim 1, characterized in that: The bimetallic sheet group (4) is composed of an outer layer of brass and an inner layer of invar. When the body temperature is ≥38°C, the bimetallic sheet group (4) instantly turns over to a concave surface, pushing the top rod (5) to move upward.

3. The intelligent deep vein catheterization and fixing device according to claim 1, characterized in that: The self-locking transmission mechanism (6) includes a lifting plate (601), and the middle of the lifting plate (601) is fixedly installed on the upper surface of the top rod (5), and the left and right ends of the lifting plate (601) are provided with tooth plates (602), and the side walls of the two tooth plates (602) are meshed and connected with spur gears (603), and the other sides of the two spur gears (603) are respectively meshed and connected with spur gears (604), and the other sides of the two spur gears (604) are respectively meshed and connected with tooth plates (606), and the upper ends of the two tooth plates (606) pass through the upper end of the shell (1) and are fixedly connected to the left and right sides of the upper clamping plate (8).

4. The intelligent deep vein catheterization and fixing device according to claim 3, characterized in that: The two spur gears 1 (603) and the two spur gears 2 (604) are both rotatably mounted inside the housing (1) via a rotating rod 1 (605). The tooth plate 2 (606) is L-shaped in design, and the side walls of the two tooth plates 2 (606) do not contact the left and right sides of the lower clamping plate (9).

5. The intelligent deep vein catheterization and fixing device according to claim 1, characterized in that: The rewinding and unwinding mechanism (7) includes a tooth plate three (701), and the tooth plate three (701) is symmetrically arranged in two groups. The two groups of tooth plates three (701) are respectively arranged on the front and rear sides of the upper end of the top rod (5). The outer sides of the two tooth plates three (701) are meshed and connected with a spur gear three (702). The middle of the two spur gears three (702) is provided with a rotating rod two (703), and the rotating rod two (703) is rotatably installed inside the shell (1). The circumferential surfaces of the two rotating rods two (703) are provided with a reel (704), and the surfaces of the two reel (704) are respectively connected to the front and rear ends of the upper surface of the titanium alloy laminate (11) through cables (705).

6. The intelligent deep vein catheterization and fixing device according to claim 5, characterized in that: The array of the titanium alloy laminates (11) is provided with twelve pieces, and the twelve titanium alloy laminates (11) are connected by micro torsion springs (12). The lower surfaces of the twelve titanium alloy laminates (11) are provided with thermal expansion particles (13). When the reeling and unreeling mechanism (7) is in operation, the twelve titanium alloy laminates (11) are driven to gather together, and at the same time, the thermal expansion particles (13) expand to fill the gaps between the laminates to enhance the fit with the patient's skin.

7. The intelligent deep vein catheterization and fixing device according to claim 6, characterized in that: A second mounting rod (10) is provided on both the front and rear sides of the lower end of the shell (1), and the front and rear ends of the twelve titanium alloy laminations (11) are movably mounted on the circumferential surface of the second mounting rod (10).

8. The intelligent deep vein catheterization and fixing device according to claim 1, characterized in that: The upper clamping plate (8) is arranged directly above the lower clamping plate (9), and arc grooves are provided in the middle of the upper clamping plate (8) and the lower clamping plate (9), and a catheter is clamped and fixed between the upper clamping plate (8) and the lower clamping plate (9) through the arc grooves.

9. The intelligent deep vein catheterization and fixing device according to claim 8, characterized in that: The arc grooves of the upper clamping plate (8) and the lower clamping plate (9) are provided with one-way fish-scale pattern micro-teeth (14), and the one-way fish-scale pattern micro-teeth (14) have a tooth height of 0.1 mm and an inclination angle of 60°.

10. An intelligent deep vein catheterization and infusion method, characterized in that Implementing the intelligent deep vein catheter fixation device according to any one of claims 1 to 9 specifically includes the following steps: Step 1: Disinfect the puncture site three times with iodine, lay a sterile drape, and the operator wears sterile gloves; Step 2: Put the probe on a sterile protective cover, observe the direction of the blood vessels in real time, and insert the puncture needle at a 30°-45° angle to the skin; Step 3: Remove the puncture needle, insert the dilator along the guide wire to expand the subcutaneous tissue, and then replace it with the catheter; Step 4: Clamp and fix the catheter between the upper clamp (8) and the lower clamp (9), then bring the side of the shell (1) provided with the bimetallic sheet group (4) into contact with the patient's skin, and then fix the shell (1) with a transparent dressing, so that the catheter can perform infusion work on the patient.

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