An electric anastomat

Abstract

The present application relates to the field of medical devices, and aims to provide an electric anastomat, comprising an anastomat body, an external sheath, a driver and a transmission mechanism, the external sheath is arranged on the front side of the anastomat body, the driver is slidably connected inside the external sheath, a slot is formed in the bottom end of the holding part of the anastomat body, a reusable handle is detachably connected in the slot, a transmission shaft sleeve is arranged at the top end of the reusable handle, and a driving assembly for driving the transmission shaft sleeve to rotate is arranged in the reusable handle; the transmission mechanism comprises a rotating arm, a straight push rod and a threaded transmission shaft; the straight push rod is threadedly connected to the threaded transmission shaft, and the bottom of the threaded transmission shaft is provided with a plug-in shaft which is plug-in matched with the transmission shaft sleeve. The present application can ensure that the electric anastomat has stability and safety during the firing process, and can be reused without cleaning the electric handle.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to an electric anastomat. BACKGROUND

[0002] Minimally invasive surgery is to achieve the same good effect as open surgery with as little or no trauma, as little damage or no damage to the patient's internal environment (local or systemic) state. As a kind of minimally invasive surgical instrument, the electric anastomat is often used for cutting and suturing of tissues in some surgical operations.

[0003] The existing electric anastomat realizes the firing mainly by converting the rotary motion of the motor into the expected motion through the transmission mechanism to realize the cutting and closing of the tissue by the anastomosis assembly. Since the thickness of the tissue of different patients is inconsistent, that is, the requirement for the firing force is also different. The low transmission efficiency of the transmission mechanism or the insufficient output power of the motor can easily lead to abnormality such as failure to form a nail or failure to cut the tissue, and the smoothness of the operation cannot be guaranteed.

[0004] The existing electric anastomat is divided into disposable anastomat and reusable anastomat, the difference between the two is whether the electric handle part can be reused. The disposable electric anastomat is scrapped after one anastomosis operation, the body, working head and electric handle are scrapped, the purpose is to avoid cross infection and other hidden dangers. However, the disposable anastomat contains a motor and a battery pack, and the excessive electric handle not only increases the production cost of the enterprise, but also increases the procurement cost of the medical institutions to the instrument;

[0005] And for the existing reusable anastomat, most of them are composed of disposable working head and reusable electric handle, after one operation, only the working head is scrapped, and the electric handle part can be used for the next operation, but it needs to be cleaned and sterilized complicatedly; In order to avoid cleaning and sterilization, a sterile barrier protection sleeve for electric handle is needed during operation. However, the electric handle with sterile barrier protection sleeve will be larger in size, which will cause poor operation of the operator.

[0006] In summary, the existing electric firing anastomat has the following defects:

[0007] 1. The transmission mechanism of the conventional electric anastomat is mainly composed of a plurality of transmission rods, and friction, transmission gap and interference motion between the rods will occur between the rods, so that the transmission efficiency is lower when the number of transmission rods is larger. Secondly, the transmission mechanism of the conventional electric anastomat usually drives the cam to rotate by the motor to control the movement of the transmission rod, and the transmission rod transmits the force to the driver of the anastomosis assembly, and the precision and hardness of the cam determine the stability of the movement of the transmission rod, so the production requirement of the cam is extremely high, which also increases the production cost.

[0008] 2. The current reusable electric handle needs to be cleaned and sterilized after each operation, which is time-consuming and complicated. Moreover, during high-temperature sterilization, the circuit board, motor and internal parts are easily affected by high temperature, which accelerates the aging of the motor or parts and shortens the service life of the device. SUMMARY

[0009] The purpose of the present application is to provide an electric anastomat that can guarantee stability and safety during firing and can be reused without cleaning the electric handle.

[0010] The purpose of the present application is achieved by the following technical solutions:

[0011] An electric anastomat comprises an anastomat body, an external sheath, a driver and a transmission mechanism. The external sheath is arranged on the front side of the anastomat body, and the driver is slidingly connected to the inside of the external sheath. A slot is formed at the bottom end of the holding part of the anastomat body, and a reusable handle is detachably connected in the slot. A transmission shaft sleeve is arranged at the top end of the reusable handle, and a driving assembly for driving the transmission shaft sleeve to rotate is arranged in the reusable handle.

[0012] The transmission mechanism comprises a rotating arm, a straight push rod and a threaded transmission shaft. The straight push rod is threadedly connected to the threaded transmission shaft, and the bottom of the threaded transmission shaft is provided with a plug-in shaft that is plug-in connected to the transmission shaft sleeve.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] 1. A firing sensing device is arranged on the transmission mechanism to eliminate the influence of transmission error between the rod members and ensure that the driver travels to the set stroke, avoiding incomplete tissue cutting and other safety hazards. In addition, the connecting shaft cooperating with the driver and the long slot on the rotating arm are connected through the shaft slot, which has a simple structure and high transmission efficiency. When the rotating arm drives the driver to move, the force direction of the driver is almost consistent, and the force is stable.

[0015] 2. The cooperation of the protective cover, the slot and the reusable handle enables the reusable handle to be in a closed space during use, avoiding contamination by blood or other biological materials, and achieving reuse without cleaning and sterilization, improving the convenience of using the instrument, reducing the workload of subsequent medical treatment and reducing the use cost.

[0016] 3. The plug-in shaft and the transmission shaft sleeve are plug-in connected in any state, and the transmission member and the transmission gear are cooperatively driven, achieving rapid assembly of the reusable handle and reducing the preparation time for surgery. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of an embodiment one of the electric anastomat of the present application;

[0018] Figure 2 is a structural schematic diagram of the threaded transmission shaft of the present application;

[0019] Figure 3 is a schematic diagram of the insertion of the insertion shaft into the transmission shaft sleeve of the present application;

[0020] Figure 4 is a schematic diagram of the insertion of the insertion shaft into the transmission shaft sleeve in an embodiment two of the electric anastomat of the present application;

[0021] Figure 5 is a structural diagram of the multiplex handle of the present application;

[0022] Figure 6 is an assembly schematic diagram of the driver, the rotating arm, the straight push rod and the threaded transmission shaft of the present application;

[0023] Figure 7 is a schematic diagram of the cooperation relationship between the firing sensing unit A and the start state sensing block A and the end state sensing block A;

[0024] Figure 8 is a schematic diagram of the cooperation relationship between the firing sensing device B and the firing sensing device C;

[0025] Figure 9 is a schematic diagram of the cooperation relationship between the start state sensing block B and the end state sensing block C.

[0026] Label explanation: 1 anastomat body, 2 external sheath, 3 driver, 3-1 connecting shaft, 3-2 end state sensing block C, 4 rotating arm, 4-1 long groove, 4-2 complementary notch, 4-3 fixed pin, 4-4 start state sensing block A, 4-5 end state sensing block A, 5 straight push rod, 5-1 integrated pin, 5-2 start state sensing block B, 6 threaded transmission shaft, 7 firing sensing unit A, 8 firing sensing device B, 9 firing sensing device C, 200 multiplex handle, 210 transmission shaft sleeve, 211 transmission teeth, 212 inner spline, 220 power plug, 400 driving assembly, 500 protective cover, 600 insertion shaft, 602 limiting flange, 610 fixed shaft, 620 insertion sheet, 630 outer spline. DETAILED DESCRIPTION

[0027] The content of the present application will be described in detail below in combination with the drawings and examples of the specification:

[0028] As shown in Figures 1-4 and Figures 7-9 , it is an embodiment one schematic diagram of the electric anastomat provided by the present application:

[0029] Embodiment one: an electric anastomat, comprising an anastomat body 1, an external sheath 2, a driver 3 and a transmission mechanism, the external sheath 2 is arranged on the front side of the anastomat body 1, and the driver 3 is slidingly connected inside the external sheath 2; it should be noted that the external sheath 2 limits the driver 3 to move along the first axis only.

[0030] The bottom end of the holding part of the anastomat body 1 is provided with a slot, and a reusable handle 200 is detachably connected in the slot, the top end of the reusable handle 200 is provided with a transmission shaft sleeve 210, and the reusable handle 200 is provided with a driving assembly 400 for driving the transmission shaft sleeve 210 to rotate;

[0031] The transmission mechanism comprises a rotating arm 4, a straight push rod 5 and a threaded transmission shaft 6; the straight push rod 5 is threadedly connected on the threaded transmission shaft 6, and the bottom of the threaded transmission shaft 6 is provided with a plug-in shaft 600 which is plug-in matched with the transmission shaft sleeve 210.

[0032] A limiting flange 602 is arranged between the threaded transmission shaft 6 and the plug-in shaft 600, and a protective cover 500 which can be covered with or separated from the bottom of the slot is also hinged on the anastomat body 1.

[0033] After the protective cover 500 is covered with the slot, a closed space is formed in the slot, and during the operation, blood or other biological materials cannot contaminate the reusable handle 200 in the slot. Therefore, after the reusable handle 200 is pushed into the slot, the protective cover 500 is buckled, the holding part of the anastomat body 1 can act as a sterile barrier protection sleeve to protect the reusable handle 200, so as to ensure that the reusable handle 200 is not contaminated after the operation, and does not need to be cleaned and sterilized, and can be used for the next operation.

[0034] A plurality of transmission teeth 211 are arranged on the inner wall of the transmission shaft sleeve 210, and the plug-in shaft 600 is provided with a transmission member matched with the transmission teeth 211.

[0035] The transmission teeth 211 are arranged with an odd number, and each transmission tooth 211 is arranged at equal intervals in a ring shape;

[0036] Or the transmission teeth 211 are arranged with an even number, and each transmission tooth 211 is arranged at staggered intervals in a ring shape (the transmission teeth 211 are not arranged at the positions of the two ends of the diameter);

[0037] The plug-in shaft 600 is provided with a through groove passing through the center, the transmission member comprises a fixed shaft 610 arranged on the opposite faces of the through groove and a plug-in piece 620 rotatably sleeved on the fixed shaft 610, at least one side of the plug-in piece 620 extends out of the through groove and is limitedly matched with the side edge of the transmission tooth 211.

[0038] Specifically, in some embodiments where the transmission teeth 211 are provided in odd number and each transmission tooth 211 is arranged in annular equidistance, when the insertion shaft 600 is inserted into the transmission shaft sleeve 210, the insertion sheet 620 can have two states:

[0039] State one, when the insertion shaft 600 is inserted into the transmission shaft sleeve 210, the insertion sheet 620 overlaps the transmission teeth 211 in the axial direction of the insertion shaft 600, and as the insertion shaft 600 is gradually inserted into the transmission shaft sleeve 210, since the insertion sheet 620 is rotatably arranged on the fixed shaft 610, when the insertion sheet 620 contacts the transmission teeth 211, the transmission teeth 211 apply a counter force to the insertion sheet 620, causing the insertion sheet 620 to swing to the opposite side in the through slot around the fixed shaft 610, and since each transmission tooth 211 is arranged in annular equidistance, the insertion sheet 620 does not interfere with the transmission teeth 211 after swinging to the opposite side, and it is noted that when the transmission teeth 211 are at least three, the distance between any two adjacent transmission teeth 211 is sufficient to accommodate the insertion sheet 620; subsequently, the driving assembly 400 drives the transmission shaft sleeve 210 to rotate, and the insertion sheet 620 is limited by the side edges of the transmission teeth 211.

[0040] State two, when the insertion shaft 600 is inserted into the transmission shaft sleeve 210, the insertion sheet 620 does not overlap the transmission teeth 211 in the axial direction, at this time, the insertion sheet 620 can be inserted into the transmission shaft sleeve 210 without obstruction, and as the driving assembly 400 drives the transmission shaft sleeve 210 to rotate, at least one side of the insertion sheet 620 is limited by the side edges of the transmission teeth 211.

[0041] Specifically, in some embodiments where the transmission teeth 211 are provided in even number and each transmission tooth 211 is arranged in annular misalignment, the purpose of arranging the transmission teeth 211 in annular misalignment is still to ensure that the insertion shaft 600 can be inserted into the transmission shaft sleeve 210 without obstruction without aligning the transmission shaft sleeve 210, and as the driving assembly 400 drives the transmission shaft sleeve 210 to rotate, the side edges of the transmission teeth 211.

[0042] Preferably, the transmission teeth 211 are provided in three.

[0043] The driving assembly 400 includes a motor and a power supply connected to the motor, and the output end of the motor is connected to the bottom of the transmission shaft sleeve 210;

[0044] The multiplex handle 200 is provided with a power plug 220 connected to the power supply, and the anastomat body 1 is further provided with a display screen, a sensing element and a buzzer connected to the power plug 220.

[0045] The rear part of the driver 3 is provided with a connecting shaft 3-1, the middle part of the rotating arm 4 is rotationally connected to the anastomat body 1, so that the rotating arm 4 can rotate around the second axis which is not parallel to the first axis; the front part of the rotating arm 4 is provided with a vertical long slot 4-1, the connecting shaft 3-1 is slidingly connected in the long slot 4-1, and the rear bottom end of the rotating arm 4 is provided with a complementary notch 4-2, the straight push rod 5 is threadedly connected to the threaded transmission shaft 6, and the straight push rod 5 is provided with an integral pin 5-1 which cooperates with the complementary notch 4-2.

[0046] Further, the rotating arm 4 is provided with a fixing pin 4-3 which is rotationally connected to the anastomat body 1.

[0047] Since the connecting shaft 3-1 is tangent to the plane of the long slot 4-1, when the rotating arm 4 rotates around the second axis, the rotating arm 4 and the connecting shaft 3-1 come into contact, driving the connecting shaft 3-1 and the driver 3 to move along the first axis.

[0048] The electric anastomat further comprises a firing sensing unit A7 arranged in the anastomat body 1, the rotating arm 4 is provided with a starting state sensing block A4-4 and a termination state sensing block A4-5, before the rotating arm 4 is fired, the starting state sensing block A4-4 is located at the sensing position of the firing sensing unit A7; after the rotating arm 4 is fired in place, the termination state sensing block A4-5 is rotated to the sensing position of the firing sensing unit A7.

[0049] When the starting state sensing block A4-4 or the termination state sensing block A4-5 moves to the set position and is detected by the firing sensing unit A7, a signal can be output to control the working state of the switch of the motor.

[0050] The electric anastomat further comprises a firing sensing device B8 arranged at the holding part of the anastomat body 1 and a firing sensing device C9 arranged at the external sheath 2;

[0051] The straight push rod 5 is provided with a starting state sensing block B5-2, which is located at the sensing position of the firing sensing device B8 before firing;

[0052] The driver 3 is provided with a termination state sensing block C3-2 which moves to the sensing position of the firing sensing device C9 after firing.

[0053] When the initial state sensing block B5-2 is in the firing sensing device B8 position, the sensing device detects that the push rod 5 is in the initial state position and transmits a signal to the control circuit, enabling the motor to execute the firing operation. During firing, when the termination state sensing block C3-2 moves to the firing sensing device C9 position, the sensing device detects that the driver 3 is in the termination state position and transmits a signal to the control circuit, cutting off the drive motor's circuit and stopping the driver 3. This design aims to eliminate the influence of transmission errors between the levers, ensuring that the driver 3 travels and retracts according to the set stroke throughout the firing process.

[0054] It should be noted that, in addition to the sensing positions listed above, the sensing positions can also be set at different locations on the moving parts, or a mechanical button structure can be used to limit the positions of the start and end states. The principles are all self-evident.

[0055] Upon firing, when the firing sensor B8 senses that the push rod 5 is in the initial state, the motor drives the push rod 5 to move along the third axis. In the moving state, the integrated pin 5-1 on the push rod 5 contacts the complementary notch 4-2 on the rotating arm 4, and the integrated pin 5-1 pushes the rotating arm 4 to rotate around the second axis. In the rotating state, the elongated groove 4-1 on the rotating arm 4 contacts the connecting shaft 3-1 of the driver 3, driving the driver 3 to move along the first axis. When the firing sensor C9 senses that the driver 3 has reached the termination state, the motor stops rotating, the driver stops moving, and the tissue cutting and suturing is completed. At this time, a pressure holding program can be set. After the pressure holding is completed, the blade automatically retracts, and the motor drives the push rod 5 to retract along the third axis. At this time, the integrated pin 5-1 on the push rod 5 engages with the complementary notch 4-2 on the rotating arm 4, causing the rotating arm 4 to rotate around the second axis, and the rotating arm 4 drives the driver 3 to retract along the first axis. When the firing sensor B8 detects that the push rod 5 has retracted to the initial position, the motor stops rotating, the driver 3 stops retracting, and the retraction of the blade is completed. This completes the entire firing process.

[0056] Example 2: An electric stapler

[0057] like Figure 4 As shown, the basic structure of this embodiment 2 is generally similar to that of embodiment 1. The difference between this embodiment and embodiment 1 is that the transmission component is an external spline 630 provided on the outer peripheral wall of the insertion shaft 600, and the inner wall of the transmission shaft sleeve 210 is provided with an internal spline 212 that matches the external spline.

[0058] Furthermore, the upper end of the key teeth of the internal spline 212 is provided with a guide surface for guiding the external spline 630 to mesh with it, and the lower end of the key teeth of the external spline 630 is provided with a wedge surface that cooperates with the guide surface.

[0059] In some embodiments, the transmission member is an inner spline provided on the outer circumferential wall of the insertion shaft 600, and the inner wall of the transmission shaft sleeve 210 is provided with an outer spline matched with the inner spline.

[0060] The above merely provides the preferred but not limiting embodiments of the present application, and the protection scope of the present application should not be limited thereto. Any person skilled in the art, according to the technical solution and the inventive concept of the present application, can make equivalent replacements or changes within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An electric anastomat comprising an anastomat body (1), an external sheath (2), a driver (3) and a transmission mechanism, the external sheath (2) being arranged on the front side of the anastomat body (1), and the driver (3) being slidingly connected to the inner side of the external sheath (2), characterized in that: a slot is formed at the bottom end of the holding part of the anastomat body (1), and a reusable handle (200) is detachably connected in the slot, the top end of the reusable handle (200) is provided with a transmission shaft sleeve (210), and the reusable handle (200) is provided with a driving assembly (400) for driving the transmission shaft sleeve (210) to rotate; the transmission mechanism comprises a rotating arm (4), a straight push rod (5) and a threaded transmission shaft (6), the straight push rod (5) is threadedly connected to the threaded transmission shaft (6), and the bottom of the threaded transmission shaft (6) is provided with a plug-in shaft (600) which is plug-in connected with the transmission shaft sleeve (210); a plurality of transmission teeth (211) are arranged on the inner wall of the transmission shaft sleeve (210), and the plug-in shaft (600) is provided with transmission pieces which are matched with the transmission teeth (211); the transmission teeth (211) are arranged in odd numbers and are arranged in an annular equidistant manner; or the transmission teeth (211) are arranged in even numbers and are arranged in an annular staggered manner; a through groove is formed through the side wall of the plug-in shaft (600), the transmission pieces comprise fixed shafts (610) arranged on opposite sides of the through groove and plug-in pieces (620) which are rotatably sleeved on the fixed shafts (610), at least one side of the plug-in pieces (620) extends out of the through groove and is limitedly matched with the side edges of the transmission teeth (211). a limiting flange (602) is arranged between the threaded transmission shaft (6) and the plug-in shaft (600), and a protective cover (500) which can be covered with or separated from the bottom of the slot is further hinged to the anastomat body (1).

2. The motorized anastomosis device of claim 1, wherein: the driving assembly (400) comprises a motor and a power supply piece which is electrically connected with the motor, and the output end of the motor is connected to the bottom of the transmission shaft sleeve (210); 3. The motorized anastomosis device of claim 1, wherein: a power plug (220) which is electrically connected with the power supply piece is arranged on the reusable handle (200), and a display screen, a sensing piece and a buzzer which are electrically connected with the power plug (220) are further arranged on the anastomat body (1). a connecting shaft (3-1) is arranged at the rear part of the driver (3), the middle part of the rotating arm (4) is rotatably connected to the anastomat body (1), a vertical long slot (4-1) is formed at the front part of the rotating arm (4), the connecting shaft (3-1) is slidingly connected in the long slot (4-1), a complementary notch (4-2) is formed at the bottom end of the rear part of the rotating arm (4), the straight push rod (5) is threadedly connected to the threaded transmission shaft (6), and the straight push rod (5) is provided with an integral pin (5-1) which is matched with the complementary notch (4-2).

4. The motorized anastomosis device of claim 1, wherein: ​ 5. The motorized anastomosis device according to any of claims 1-4, wherein: Further comprising a firing sensing unit A (7) arranged in the anastomat body (1), the rotating arm (4) is provided with a starting state sensing block A (4-4) and a termination state sensing block A (4-5), before the rotating arm (4) is fired, the starting state sensing block A (4-4) is located in the sensing position of the firing sensing unit A (7); after the rotating arm (4) is fired in place, the termination state sensing block A (4-5) is rotated to the sensing position of the firing sensing unit A (7).

6. The motorized anastomosis device of claim 5, wherein: Further comprising a firing sensing device B (8) arranged at the holding part of the anastomat body (1) and a firing sensing device C (9) arranged at the external sheath (2); The straight push rod (5) is provided with a starting state sensing block B (5-2), and the starting state sensing block B (5-2) is located in the sensing position of the firing sensing device B (8) before firing; The driver (3) is provided with a termination state sensing block C (3-2), and the termination state sensing block C (3-2) moves to the sensing position of the firing sensing device C (9) after firing in place.

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