Cannula advancement device for cardiac surgery

Abstract

The application discloses a cannula pushing device for heart surgery and relates to the technical field of cannula pushing devices.The device comprises a main body mechanism, which comprises a shell, the inner wall of the shell is rotationally connected with a rotating wheel, the surface of the rotating wheel is fixedly provided with a handle, the top of the shell is attached with a guide plate, the inner wall of the guide plate is fixedly connected with the surface of the shell through bolts, the surface of the shell is fixedly provided with a grip, and the surface of the shell is provided with a detection mechanism, which comprises an air tightness detection unit.The device can quickly and accurately determine whether the air tightness of the cannula is qualified by setting the air tightness detection unit and utilizing the change in pressure difference, thereby improving the surgery preparation efficiency, reducing the risk of the patient in the surgery due to the leakage of the cannula, and ensuring the safety and reliability of the cannula in the surgery.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intubation advancing device, in particular to an intubation advancing device for cardiac surgery. BACKGROUND

[0002] The intubation advancing device for cardiac surgery is a specially designed medical instrument for stably and accurately advancing the intubation tube in cardiovascular surgery, assisting the doctor to insert the intubation tube into the patient's body, and effectively maintaining the stability of the intubation tube during the advancing process, improving the accuracy and safety of the surgery.

[0003] The intubation advancing device for cardiac surgery is usually composed of a handle, a rotating wheel and a guide plate. The doctor holds the handle, rotates the rotating wheel, guides through the guide plate, and realizes the pushing of the intubation tube through the surface contact between the rotating wheel and the baffle, thereby realizing the auxiliary work of the intubation surgery. Although the intubation tube will be inspected during production, it is inevitable that a few intubation tubes will break and not be detected, resulting in leakage during the pushing process. When the intubation tube leaks, external pathogens may enter the patient's body, especially when the patient's resistance is weak, which can easily cause postoperative nosocomial infection. It is difficult to detect the used intubation tube twice, which increases the risk of surgery and reduces the safety of surgery.

[0004] And we can find that the existing intubation advancing device for cardiac surgery in the market can hardly avoid the above-mentioned problems at the same time, and even if it can be solved, it needs to be solved by external tools, so it cannot achieve the desired effect. Therefore, we propose an intubation advancing device for cardiac surgery. SUMMARY

[0005] The purpose of the present application is to provide an intubation advancing device for cardiac surgery to solve the problems mentioned in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an intubation advancing device for cardiac surgery, comprising a main body mechanism, the main body mechanism comprising a shell, the inner wall of the shell being rotatably connected with a rotating wheel, the surface of the rotating wheel being fixedly installed with a handle, the top of the shell being attached with a guide plate, the inner wall of the guide plate being fixedly connected with the surface of the shell through bolts, the surface of the shell being fixedly installed with a handle, and the surface of the shell being provided with a detection mechanism.

[0007] The detection mechanism comprises a gas tightness detection unit, the gas tightness detection unit being arranged on the surface of the shell, and the gas tightness detection unit being used for gas tightness detection of the advancing intubation tube.

[0008] The detection mechanism further comprises a guiding unit arranged on the inner wall of the air tightness detection unit, which is used for guiding the movement during the detection of the cannula.

[0009] The surface of the shell is provided with a limiting mechanism for limiting the rotation of the rotating wheel, and the air tightness detection unit is used in cooperation with the limiting mechanism.

[0010] Preferably, the air tightness detection unit comprises a sealed box fixedly installed on one side of the shell, both sides of the sealed box are provided with connecting holes, the top of the sealed box is fixedly connected with a connecting pipe, the inner cavity of the connecting pipe is slidably connected with a piston, the top of the sealed box is fixedly installed with a micro air pump, the output end of the micro air pump is fixedly connected with an air inlet pipe, one end of the air inlet pipe is fixedly connected with the top of the sealed box, one side of the shell is fixedly installed with a storage battery, and the output end of the storage battery is electrically connected with the input end of the micro air pump.

[0011] Preferably, the inner wall of the connecting pipe is fixedly installed with a limiting ring, and the top of the limiting ring is used in cooperation with the bottom of the sealing gasket.

[0012] Preferably, the inner wall of the connecting hole is provided with a mounting groove, and the inner cavity of the mounting groove is provided with an elastic lip, and the surface of the elastic lip is in close contact with the inner wall of the mounting groove.

[0013] Preferably, the surface of the shell is provided with a protection box, the storage battery is fixedly installed in the inner cavity of the protection box, and the protection box and the shell are fixedly connected through bolts.

[0014] Preferably, the guiding unit comprises a moving groove arranged on the inner wall of the sealed box, the inner cavity of the moving groove is slidably connected with a fixing ring, the number of the fixing ring is two, one side of the fixing ring is fixedly installed with a metal sheet, the surface of the sealed box is provided with a connecting groove, the inner cavity of the connecting groove is slidably connected with a fixing frame, the bottom of the fixing frame is fixedly installed with an electromagnet, the input end of the electromagnet is electrically connected with the input end of the storage battery, the inner side of the fixing ring is fixedly installed with a friction pad, the inner wall of the moving groove is rotatably connected with a fixed rod, the surface of the fixed rod is provided with a movable groove, the inner cavity of the movable groove is provided with a coil spring, one end of the coil spring is movably connected with the inner cavity of the movable groove, and the other end of the coil spring is fixedly connected with the surface of the fixing ring.

[0015] Preferably, the inner wall of the moving groove is provided with a guide groove, the surface of the metal sheet is provided with a spiral spring, one end of the spiral spring is fixedly installed on the surface of the metal sheet, the other end of the spiral spring is fixedly installed with a guide sheet, and the surface of the guide sheet is slidably connected with the inner cavity of the guide groove.

[0016] Preferably, the limiting mechanism comprises a micro electric push rod fixedly installed on the surface of the shell, a limiting tooth plate fixedly installed on the telescopic end of the micro electric push rod, a gear fixedly installed on the surface of the rotating wheel, the gear being used in cooperation with the gear teeth of the limiting tooth plate, a support frame fixedly installed on the top of the sealed box, a touch switch fixedly installed on the bottom of the support frame, a touch rod fixedly installed on the top of the piston, one end of the touch rod being in contact with the bottom of the touch switch, a connecting ring fixedly installed on the inner wall of the connecting pipe, the inner cavity of the connecting ring being in sliding connection with the surface of the touch rod, a weak spring sleeved on the surface of the touch rod, one end of the weak spring being fixedly connected with the bottom of the connecting ring, the other end of the weak spring being fixedly connected with the top of the piston, the output end of the touch switch being in electric connection with the input end of the micro electric push rod, and the input end of the micro electric push rod being in electric connection with the output end of the storage battery.

[0017] Preferably, the surface of the shell is provided with a sliding groove, and the surface of the limiting tooth plate is fixedly provided with a sliding block in sliding connection with the inner cavity of the sliding groove.

[0018] Preferably, the surface of the shell is fixedly provided with a flashing lamp in electric connection between the input end of the flashing lamp and the output end of the storage battery and between the output end of the touch switch and the input end of the flashing lamp.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] 1. The air tightness detection unit is arranged, the change caused by the pressure difference is utilized, the air tightness of the cannula can be quickly and accurately judged, the operation preparation efficiency is improved, the risk of the patient in the operation is reduced due to the leakage of the cannula, and the safety and reliability of the cannula in the operation process are ensured.

[0021] 2. The guiding unit is arranged, the electromagnetic iron and the coil spring are cooperated, the quick clamping and guiding of the cannula are realized, the convenience and stability of the operation are improved, the difficulty of the cannula into the connecting hole is reduced, and the work efficiency is improved.

[0022] 3. The limiting mechanism is arranged, the doctor can intuitively understand the detection result, make judgment and take measures in time, intuitively judge the qualified rate of the cannula, reduce the judgment time, reduce the thinking time of the doctor in making judgment and taking measures, reduce the risk of the patient in the operation again, and improve the safety of the operation again. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a whole structure schematic view of the present application.

[0024] Figure 2 Structure diagram of the gear and protective box of the present application;

[0025] Figure 3 Sectional view of the sealing box of the present application;

[0026] Figure 4 Sectional view of the connecting pipe of the present application;

[0027] Figure 5 Structure diagram of the fixed ring and coil spring of the present application;

[0028] Figure 6 Structure diagram of the limiting tooth plate and gear of the present application;

[0029] Figure 7 Structure diagram of the micro electric push rod, limiting tooth plate and sliding block of the present application;

[0030] Figure 8 Structure exploded view of the coil spring and fixed rod of the present application;

[0031] Figure 9 Structure exploded view of the protective box, shell and storage battery of the present application.

[0032] In the figure: 1, main body mechanism; 11, shell; 12, rotating wheel; 13, guide plate; 14, handle; 15, grip; 2, detection mechanism; 21, air tightness detection unit; 2101, sealing box; 2102, connecting hole; 2103, connecting pipe; 2104, piston; 2105, micro air pump; 2106, air inlet pipe; 2107, storage battery; 2108, limiting ring; 2109, mounting groove; 2110, elastic lip; 2111, protective box; 22, guide unit; 2201, fixed ring; 2202, metal sheet; 2203, guide groove; 2204, guide sheet; 2205, moving groove; 2206, connecting groove; 2207, fixed frame; 2208, electromagnet; 2209, coil spring; 2210, friction pad; 2211, movable groove; 2212, coil spring; 2213, fixed rod; 3, limiting mechanism; 301, electric push rod; 302, limiting tooth plate; 303, gear; 304, support frame; 305, touch switch; 306, connecting ring; 307, weak spring; 308, touch rod; 309, sliding groove; 310, sliding block; 311, flashing light. DETAILED DESCRIPTION

[0033] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of the present application.

[0034] Embodiment 1: see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , and Figure 9 The present application provides a technical solution: a cannula advancing device for heart surgery, comprising a main body mechanism 1, the main body mechanism 1 comprising a shell 11, the inner wall of the shell 11 being rotationally connected with a rotating wheel 12, the surface of the rotating wheel 12 being fixedly installed with a handle 14, the top of the shell 11 being attached with a guide plate 13, the inner wall of the guide plate 13 and the surface of the shell 11 being fixedly connected through bolts, the surface of the shell 11 being fixedly installed with a grip 15, and the surface of the shell 11 being provided with a detection mechanism 2.

[0035] The detection mechanism 2 comprises an airtightness detection unit 21, the airtightness detection unit 21 being arranged on the surface of the shell 11, and the airtightness detection unit 21 being used for airtightness detection of the advancing cannula.

[0036] As a further limitation of the detection mechanism 2 of the present application, the airtightness detection unit 21 comprises a sealed box 2101, the sealed box 2101 being fixedly installed on one side of the shell 11, both sides of the sealed box 2101 being provided with connecting holes 2102, the top of the sealed box 2101 being fixedly communicated with a connecting pipe 2103, the inner cavity of the connecting pipe 2103 being slidingly connected with a piston 2104, the top of the sealed box 2101 being fixedly installed with a micro air pump 2105, the output end of the micro air pump 2105 being fixedly communicated with an air inlet pipe 2106, one end of the air inlet pipe 2106 being fixedly communicated with the top of the sealed box 2101, one side of the shell 11 being fixedly installed with a storage battery 2107, and the output end of the storage battery 2107 being electrically connected with the input end of the micro air pump 2105. By arranging the airtightness detection unit 21, the change caused by the pressure difference can quickly and accurately determine whether the cannula airtightness is qualified, thereby improving the operation preparation efficiency, reducing the risk of increasing the patient's operation due to the leakage of the cannula, and ensuring the safety and reliability of the cannula during the operation;

[0037] The inner wall of the connecting pipe 2103 is fixedly provided with a limiting ring 2108, the top of the limiting ring 2108 is matched with the bottom of the sealing gasket, by arranging the limiting ring 2108, when the bottom of the piston 2104 contacts with the top of the limiting block, the distance of the downward movement of the piston 2104 can be limited, and the separation between the piston 2104 and the connecting pipe 2103 is avoided

[0038] The inner wall of the connecting hole 2102 is provided with a mounting groove 2109, the inner cavity of the mounting groove 2109 is provided with an elastic lip 2110, the surface of the elastic lip 2110 is in close contact with the inner wall of the mounting groove 2109, by arranging the elastic lip 2110, the mounting groove 2109 can be used for mounting the elastic lip 2110, and by the close contact between the mounting groove 2109 and the elastic lip 2110, the sealing property of the closed space formed by the sealing box 2101 and the surface of the insertion pipe is further improved.

[0039] The surface of the shell 11 is provided with a protection box 2111, the storage battery 2107 is fixedly arranged in the inner cavity of the protection box 2111, the protection box 2111 is fixedly connected with the shell 11 through bolts, by arranging the protection box 2111, the storage battery 2107 can be protected, a closed space is formed by the protection box 2111 and the shell 11, the contact between the storage battery 2107 and the external environment is avoided, and the protection of the storage battery 2107 is realized.

[0040] The specific implementation of the embodiment is that when the patient needs to be intubated for treatment in a heart surgery, the doctor holds the handle 15, inserts one end of the intubation tube into the connecting hole 2102 reserved in the sealed box 2101, and then into the cavity formed by the guide plate 13 and the shell 11 from the other connecting hole 2102, and contacts the inner side of the rotating wheel 12. Turning the handle 14 can drive the rotating wheel 12 to rotate in the inner cavity of the shell 11, and through the friction between the guide plate 13, the inner wall of the rotating wheel 12 and the intubation tube, the intubation tube is pushed to move, the intubation tube is pushed, the doctor inserts the intubation tube into the patient's body, and the safety of the operation is increased. Before pushing the intubation tube, turn on the switch of the battery 2107, power the micro air pump 2105 through the battery 2107, the micro air pump 2105 starts to work, and the micro air pump 2105 starts to work. Through the air inlet pipe 2106, gas is transported to the inside of the sealed box 2101, and through the contact between the intubation tube and the connecting hole 2102, the closed space formed by the sealed box 2101 can make the micro air pump 2105 work continuously, so that the pressure in the sealed box 2101 gradually increases. With the continuous increase of the pressure, the air pressure in the sealed box 2101 will push the piston 2104 to move upward in the inner cavity of the connecting pipe 2103. When the micro air pump 2105 stops working, the piston 2104 will stop moving because the pressure will not change. When the intubation tube is damaged, the pressure in the sealed box 2101 will contact the outside environment, so that the air pressure in the sealed box 2101 decreases. When the air pressure decreases, the piston 2104 will move downward. Through the movement of the piston 2104, it can be judged whether the air tightness of the intubation tube is qualified. Through the continuous pushing of the rotating wheel 12, the surface of the intubation tube contacts the inner wall of the connecting hole 2102 during the movement of the intubation tube, so that the continuous detection of the intubation tube is realized, thereby increasing the safety of the intubation tube in use.

[0041] Embodiment 2: see Figure 1 、 Figure 2 、 Figure 3 And Figure 5 , the present application provides a technical scheme: a intubation tube pushing device for heart surgery, the present application is improved according to the technical problems mentioned in the background art, the detection mechanism 2 further includes a guide unit 22, the guide unit 22 is arranged on the inner wall of the air tightness detection unit 21, and the guide unit 22 is used for guiding the movement of the intubation tube during detection.

[0042] As a further limitation of the detection mechanism 2 of the application, the guide unit 22 comprises a moving groove 2205 opened in the inner wall of the sealing box 2101, the inner cavity of the moving groove 2205 is slidably connected with a fixed ring 2201, the number of the fixed ring 2201 is two, a metal sheet 2202 is fixedly installed on one side of the fixed ring 2201, a connecting groove 2206 is opened in the surface of the sealing box 2101, a fixed frame 2207 is slidably connected in the inner cavity of the connecting groove 2206, an electromagnet 2208 is fixedly installed on the bottom of the fixed frame 2207, the input end of the electromagnet 2208 is electrically connected with the input end of the storage battery 2107, a friction pad 2210 is fixedly installed on the inner side of the fixed ring 2201, a fixed rod 2213 is rotatably connected with the inner wall of the moving groove 2205, a movable groove 2211 is opened in the surface of the fixed rod 2213, a coil spring 2209 is arranged in the inner cavity of the movable groove 2211, one end of the coil spring 2209 is movably connected with the inner cavity of the movable groove 2211, the other end of the coil spring 2209 is fixedly connected with the surface of the fixed ring 2201, through the cooperation of the electromagnet 2208 and the coil spring 2209, the guide unit 22 can quickly clamp and guide the cannula, improve the convenience and stability of operation, reduce the difficulty of the cannula entering the connecting hole 2102, and improve the work efficiency.

[0043] A guide groove 2203 is opened in the inner wall of the moving groove 2205, a spiral spring 2212 is arranged on the surface of the metal sheet 2202, one end of the spiral spring 2212 is fixedly installed on the surface of the metal sheet 2202, the other end of the spiral spring 2212 is fixedly installed with a guide sheet 2204, the surface of the guide sheet 2204 is slidably connected with the inner cavity of the guide groove 2203, through the sliding connection of the guide groove 2203 and the guide sheet 2204, the movement of the fixed ring 2201 can be guided, the guide sheet 2204 is made of PVC material, so that the fixed ring 2201 moves horizontally, avoiding the deflection of the fixed ring 2201, when the metal sheet 2202 approaches the electromagnet 2208, the spiral spring 2212 can be extruded, so that it is in a compressed state, when the electromagnet 2208 cancels the attraction to the metal sheet 2202, under the reaction force of the spiral spring 2212, the guide sheet 2204 is prevented from moving out of the inner cavity of the guide groove.

[0044] The specific implementation of the embodiment is: after the cannula enters the inner cavity of the sealed box 2101 from the connecting hole 2102, the front end of the cannula enters the inner cavity of the fixing ring 2201 and moves out a small section from the fixing ring 2201, so that the friction pad 2210 is in contact with the surface of the cannula, the electromagnetic iron 2208 is powered by the battery 2107 to generate a magnetic force, the metal sheet 2202 is made of iron, the fixing ring 2201 is made of PVC material, the metal sheet 2202 is attracted, so that the fixing ring 2201 slightly moves towards the electromagnetic iron 2208, and at the same time, through the movable groove 2211, the coil spring 2209 can slide on the surface of the fixing rod 2213, and the fixing rod 2213 and the coil spring 2209 are prevented from being separated, so that the cannula is clamped, the fixing frame 2207 slides in the inner cavity of the connecting groove 2206, the electromagnetic iron 2208 starts to move, so that the fixing ring 2201 moves in the inner cavity of the moving groove 2205, and the coil spring 2209 is stretched, when the fixing ring 2201 moves to the inner wall on the other side of the moving groove 2205, the power supply to the electromagnetic iron 2208 is cancelled, the magnetic force of the electromagnetic iron 2208 is lost, the attraction to the metal sheet 2202 is cancelled, and the clamping of the cannula is cancelled, so that the cannula can move out of the inner cavity of the sealed box 2101, the guiding of the cannula is completed, and the difficulty of the cannula entering two connecting holes 2102 at the same time is reduced.

[0045] Embodiment 3: see Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 And Figure 8 The application provides a technical solution: a cannula pushing device for heart surgery, the application makes corresponding improvements according to the technical problems mentioned in the background art, the surface of the shell 11 is provided with a limiting mechanism 3, the limiting mechanism 3 is used for limiting the rotating rotating wheel 12, and the airtightness detection unit 21 is used in cooperation with the limiting mechanism 3.

[0046] As a further limitation of the limiting mechanism 3 of the application, the limiting mechanism 3 comprises a micro electric push rod 301 fixedly installed on the surface of the shell 11, the telescopic end of the micro electric push rod 301 is fixedly installed with a limiting tooth plate 302, the surface of the rotating wheel 12 is fixedly installed with a gear 303, the gear 303 is used in cooperation with the teeth of the limiting tooth plate 302, the top of the sealing box 2101 is fixedly installed with a supporting frame 304, the bottom of the supporting frame 304 is fixedly installed with a touch switch 305, the top of the piston 2104 is fixedly installed with a touch rod 308, one end of the touch rod 308 is in contact with the bottom of the touch switch 305, the inner wall of the connecting pipe 2103 is fixedly installed with a connecting ring 306, the inner cavity of the connecting ring 306 is in sliding connection with the surface of the touch rod 308, the surface of the touch rod 308 is sleeved with a weak spring 307, one end of the weak spring 307 is fixedly connected with the bottom of the connecting ring 306, the other end of the weak spring 307 is fixedly connected with the top of the piston 2104, the touch switch 305 is electrically connected with the input end of the micro electric push rod 301, the input end of the micro electric push rod 301 is electrically connected with the output end of the storage battery 2107, by arranging the limiting mechanism 3, the doctor can intuitively understand the detection result, so as to make judgment and response measures in time, and the qualified rate of intubation can be intuitively judged, the judgment time is reduced, so as to reduce the thinking time of the doctor to make judgment and response measures, the risk of the patient in the operation is reduced again, and the safety of the operation is improved again.

[0047] The surface of the shell 11 is provided with a sliding groove 309, the surface of the limiting tooth plate 302 is fixedly installed with a sliding block 310, the surface of the sliding block 310 is in sliding connection with the inner cavity of the sliding groove 309, through the sliding connection of the sliding groove 309 and the sliding block 310, the movement of the limiting tooth plate 302 can be guided, so that the limiting tooth plate 302 moves horizontally;

[0048] The surface of the shell 11 is fixedly installed with a flashing light 311, the input end of the flashing light 311 is electrically connected with the output end of the storage battery 2107, the output end of the touch switch 305 is electrically connected with the input end of the flashing light 311, through the flashing light 311, when the touch switch 305 is not in contact with the touch rod 308, the flashing light 311 is lit, when the flashing light 311 is lit, it indicates that the intubation has unqualified phenomenon, which further enables the doctor to intuitively understand the detection result.

[0049] The specific implementation of the embodiment is that the touch switch 305 is supported by the support frame 304, when the micro air pump 2105 starts to pressurize the sealed box 2101, the piston 2104 moves upward in the inner cavity of the connecting pipe 2103, which drives the touch rod 308 to move upward, when the touch rod 308 contacts the touch switch 305, the circuit between the micro air pump 2105 and the storage battery 2107 is disconnected, so that the micro air pump 2105 stops working, at the same time, the upward movement of the piston 2104 compresses the weak spring 307, through cooperation with the connecting ring 306, the weak spring 307 is in a compressed state, when the cannula leaks, through the downward movement of the piston 2104 and the reaction force of the weak spring 307, the touch rod 308 moves downward, so that the touch rod 308 cancels the contact with the touch switch 305, after not contacting the touch switch 305, the micro electric push rod 301 is controlled to push the limiting tooth plate 302 to move, so that the teeth of the limiting tooth plate 302 mesh with the teeth of the gear 303, thereby limiting the continuous pushing of the cannula, so that the doctor can directly judge the result of the cannula air tightness detection.

[0050] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0051] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Cannula advancement device for heart surgery, comprising a body mechanism (1), characterized in that: The main body mechanism (1) includes a shell (11), the inner wall of the shell (11) is rotationally connected with a rotating wheel (12), the surface of the rotating wheel (12) is fixedly installed with a handle (14), the top of the shell (11) is attached with a guide plate (13), the inner wall of the guide plate (13) and the surface of the shell (11) are fixedly connected through bolts, the surface of the shell (11) is fixedly installed with a handle (15), and the surface of the shell (11) is provided with a detection mechanism (2); The detection mechanism (2) includes an airtightness detection unit (21), the airtightness detection unit (21) is arranged on the surface of the shell (11), and the airtightness detection unit (21) is used for airtightness detection of the advancing cannula; The detection mechanism (2) further includes a guide unit (22), the guide unit (22) is arranged on the inner wall of the airtightness detection unit (21), and the guide unit (22) is used for guiding the movement during cannula detection; The surface of the shell (11) is provided with a limiting mechanism (3), the limiting mechanism (3) is used for limiting the rotation of the rotating wheel (12), and the airtightness detection unit (21) is used in cooperation with the limiting mechanism (3); The airtightness detection unit (21) includes a sealed box (2101), the sealed box (2101) is fixedly installed on one side of the shell (11), both sides of the sealed box (2101) are provided with connecting holes (2102), the top of the sealed box (2101) is fixedly communicated with a connecting pipe (2103), the inner cavity of the connecting pipe (2103) is slidably connected with a piston (2104), the top of the sealed box (2101) is fixedly installed with a micro air pump (2105), the output end of the micro air pump (2105) is fixedly communicated with an air inlet pipe (2106), one end of the air inlet pipe (2106) is fixedly communicated with the top of the sealed box (2101), one side of the shell (11) is fixedly installed with a storage battery (2107), and the output end of the storage battery (2107) is electrically connected with the input end of the micro air pump (2105). The guide unit (22) includes a moving groove (2205) formed in the inner wall of the sealing box (2101), the inner cavity of the moving groove (2205) is slidably connected with a fixing ring (2201), the number of the fixing ring (2201) is two, one side of the fixing ring (2201) is fixedly installed with a metal sheet (2202), the surface of the sealing box (2101) is formed with a connecting groove (2206), the inner cavity of the connecting groove (2206) is slidably connected with a fixing frame (2207), the bottom of the fixing frame (2207) is fixedly installed with an electromagnet (2208), the input end of the electromagnet (2208) is electrically connected with the input end of the battery (2107), the inner side of the fixing ring (2201) is fixedly installed with a friction pad (2210), the inner wall of the moving groove (2205) is rotatably connected with a fixed rod (2213), the surface of the fixed rod (2213) is formed with a movable groove (2211), the inner cavity of the movable groove (2211) is provided with a coil spring (2209), one end of the coil spring (2209) is movably connected with the inner cavity of the movable groove (2211), the other end of the coil spring (2209) is fixedly connected with the surface of the fixing ring (2201); The limiting mechanism (3) includes a micro electric push rod (301), the micro electric push rod (301) is fixedly installed on the surface of the shell (11), the telescopic end of the micro electric push rod (301) is fixedly installed with a limiting toothed plate (302), the surface of the rotating wheel (12) is fixedly installed with a gear (303), the gear (303) is used in cooperation with the teeth of the limiting toothed plate (302), the top of the sealing box (2101) is fixedly installed with a supporting frame (304), the bottom of the supporting frame (304) is fixedly installed with a touch switch (305), the top of the piston (2104) is fixedly installed with a touch rod (308), one end of the touch rod (308) is in contact with the bottom of the touch switch (305), the inner wall of the connecting pipe (2103) is fixedly installed with a connecting ring (306), the inner cavity of the connecting ring (306) is slidably connected with the surface of the touch rod (308), the surface of the touch rod (308) is sleeved with a weak spring (307), one end of the weak spring (307) is fixedly connected with the bottom of the connecting ring (306), the other end of the weak spring (307) is fixedly connected with the top of the piston (2104), the touch switch (305) is electrically connected with the input end of the micro electric push rod (301), the input end of the micro electric push rod (301) is electrically connected with the output end of the battery (2107).

2. A cannula advancement device for use in cardiac surgery according to claim 1, characterized in that: The inner wall of the connecting pipe (2103) is fixedly installed with a limiting ring (2108), the top of the limiting ring (2108) is used in cooperation with the bottom of the sealing gasket.

3. A cannula advancement device for use in cardiac surgery according to claim 1, characterized in that: The inner wall of the connecting hole (2102) is provided with a mounting groove (2109), an inner cavity of the mounting groove (2109) is provided with an elastic lip (2110), and the surface of the elastic lip (2110) is in close contact with the inner wall of the mounting groove (2109).

4. A cannula advancement device for use in cardiac surgery according to claim 1, characterized in that: The surface of the shell (11) is provided with a protection box (2111), the storage battery (2107) is fixedly installed in the inner cavity of the protection box (2111), and the protection box (2111) is fixedly connected with the shell (11) through bolts.

5. A cannula advancement device for use in cardiac surgery according to claim 1, characterized in that: The inner wall of the moving groove (2205) is provided with a guide groove (2203), the surface of the metal sheet (2202) is provided with a spiral spring (2212), one end of the spiral spring (2212) is fixedly installed on the surface of the metal sheet (2202), the other end of the spiral spring (2212) is fixedly installed with a guide sheet (2204), and the surface of the guide sheet (2204) is in sliding connection with the inner cavity of the guide groove (2203).

6. A cannula advancement device for use in cardiac surgery according to claim 1, characterized in that: The surface of the shell (11) is provided with a sliding groove (309), the surface of the limiting toothed plate (302) is fixedly installed with a sliding block (310), and the surface of the sliding block (310) is in sliding connection with the inner cavity of the sliding groove (309).

7. A cannula advancement device for use in cardiac surgery according to claim 1, characterized in that: The surface of the shell (11) is fixedly installed with a flashing lamp (311), the input end of the flashing lamp (311) is electrically connected with the output end of the storage battery (2107), and the output end of the touch switch (305) is electrically connected with the input end of the flashing lamp (311).

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