A driving device for a surgical instrument and a patch fixing device

Abstract

The present invention relates to a driving device of a surgical instrument and a patch fixing device. The driving device comprises a driving assembly, a transmission assembly and a pin pushing assembly; the driving assembly is used to drive the transmission assembly; the transmission assembly comprises a sleeve assembly, a screw rod and a first engaging member; the pin pushing assembly comprises a pin pushing sheet and an engaging assembly; the engaging assembly comprises a second engaging member, the second engaging member and the first engaging member are engaged with each other in a detachable manner, and the first engaging member can drive the second engaging member to rotate. The driving device provided by the present invention can provide power for surgical instruments to achieve periodic firing; and the driving device can prevent the pin pushing structure from reversing. The present invention also provides a patch fixing device, which uses the above-mentioned driving device to achieve continuous firing of multiple fixing pins, thereby effectively fixing the medical patch at the tissue defect.

Description

Technical Field

[0001] The present invention relates to medical instruments, and more particularly to a driving device of a surgical instrument and a patch fixer. The driving device can provide power to the patch fixer to drive the patch fixation pins in the patch fixer to move. The fixation pins of the fixation device pass through the medical patch and enter the human tissue (e.g., the abdominal wall) and are fixed on the human tissue, so that the patch fixer can fix various medical patches on biological tissues. Background Art

[0002] The organs or tissues in the abdominal cavity bulge out from the weak area or defect of the abdominal wall, which is medically called hernia. Hernia is a common and frequent disease in surgery. The weakness and defect of the abdominal wall tissue caused by various congenital and acquired reasons are the causes of hernia. Surgical treatment is currently the only effective treatment method. Tension-free hernioplasty is currently the main surgical method for treating hernia. The concept of tension-free hernioplasty was first proposed by American physician Lichtenstein in the 1980s. This repair uses artificial materials as a patch to strengthen the posterior wall of the inguinal canal. This method not only strengthens the strength of the weak area of ​​the abdominal wall, but also reshapes the internal ring opening, and overcomes the interference of traditional surgery on the normal tissue anatomical structure. The layers are clear, and the surrounding tissues are tension-free after repair. Currently commonly used are flat-plate tension-free hernioplasty and hernia ring filling tension-free hernioplasty. With the advancement of medical technology, the concept of tension-free herniorrhaphy is no longer limited to the surgical treatment of inguinal hernias. This procedure is also used by surgeons to treat diseases such as abdominal wall incisional hernias, parastomal hernias, and hiatal hernias. Good surgical results have been achieved, and the incidence of complications is lower than that of traditional surgery. In addition, with the rapid development of laparoscopic technology in the field of surgery, laparoscopic herniorrhaphy has emerged, using a laparoscope to deliver patches made of implant materials into the body to repair and enhance weak or defective parts of the body. The recurrence rate of tension-free herniorrhaphy is significantly lower than that of traditional surgery.

[0003] At present, the methods for fixing the patch include sutures, fixing nails or medical glue. The method of using fixing nails is a relatively mature and widely used method. In the method of fixing the patch with fixing nails, the patch is first placed on the affected area, and then the repair fixator is fired to send out the fixing nails, and the fixing nails fix the patch to the affected area. Fixing nails include two categories: metal nails and absorbable nails. However, long-term retention of metal nails in the body will cause persistent postoperative pain, and even require surgery again to remove these metal nails used for fixation. With the continuous increase in the types of absorbable materials and the continuous improvement of material properties, the use of absorbable nails is becoming more and more widespread. After being implanted in the body, the absorbable nails have sufficient strength in the early stage to stably keep the patch on the tissue; as time changes, the absorbable nails gradually degrade until they are completely absorbed. This fixing device can also be used to fix other implant materials or soft tissues in the body. Summary of the invention

[0004] The present invention provides a driving device for a surgical instrument, which can periodically provide power to the surgical instrument so that the surgical instrument can be fired periodically. The driving device can realize the periodic transmission of motion with a detachable transmission coupling structure, and can prevent the pin pushing structure from reversing. The present invention also provides a patch fixing device, which can realize the continuous firing of multiple fixing pins by using the above-mentioned driving device, thereby effectively fixing the medical patch at the tissue defect.

[0005] The present invention provides a driving device of a surgical instrument, comprising a driving assembly, a transmission assembly and a pin-pushing assembly; the driving assembly is used to drive the transmission assembly; the transmission assembly comprises a sleeve assembly, a screw rod and a first engaging member; the sleeve assembly comprises a pin, a first sleeve and a second sleeve; the first sleeve is connected to the driving assembly; the first sleeve is sleeved with the second sleeve, and a through groove is provided on the wall of the second sleeve; the pin is provided on the first sleeve, and the pin passes through the through groove and is coupled to the screw rod; the second sleeve comprises a first stopper and a second stopper, and the first sleeve The cylinder can move between the first stopper and the second stopper; the first engagement member is arranged to be connected with the screw rod; the push pin assembly includes a push pin sheet and an engagement member, and the engagement member includes a third stopper and a second engagement member; the second engagement member and the first engagement member are engaged with each other in a detachable manner, and the first engagement member can drive the second engagement member to rotate; the push pin sheet is coupled with the engagement member so that the push pin sheet and the engagement member can move independently in a first direction, and the push pin sheet and the engagement member can rotate together. When the driving assembly drives the first sleeve, the pin arranged on the first sleeve drives the screw rod to rotate, and the rotation is transmitted through the engagement between the first engagement member and the second engagement member. When the driving assembly drives the first sleeve to squeeze the second stopper, the separation of the first engagement member and the second engagement member is realized. At the same time, when the first engagement member is separated from the second engagement member, the driving device runs to the end position, and cannot move further or provide further driving power. At this time, the driving device starts to reset, the first sleeve moves in the opposite direction, and drives the screw rod to rotate in the opposite direction through the pin. Since the first meshing member and the second meshing member have been separated, the reverse rotation of the first meshing member will not cause the reversal of the second meshing member. Finally, the driving device is reset. This structure can repeatedly provide the push nail assembly with power for rotation, while ensuring that the push nail piece rotates in a single direction without reversing.

[0006] The second sleeve includes an extension portion, which can abut against the third stop portion and drive the engagement assembly to separate from the first engagement member. The extension portion presses the third stop portion to separate the pin push assembly from the transmission assembly.

[0007] The pin pusher assembly further includes a third engagement member, which is disposed on the pin pusher sheet; the engagement assembly further includes a fourth engagement member; the third engagement member and the fourth engagement member engage with each other, and the engagement enables the two to move independently in one direction and rotate together.

[0008] The transmission assembly further comprises a connecting hook, and the connecting hook can drive the third stopper to move in at least one direction. The connecting hook is used to drive the pin pusher assembly to reset.

[0009] The second engagement member is fixedly connected to the third stop portion; or the second engagement member is integral with the third stop portion.

[0010] The driving assembly includes a first driving member and a second driving member; the first driving member is connected to the second driving member in a relatively rotatable manner; the first sleeve includes a connecting portion, and the connecting portion is connected to the second driving member in a relatively movable manner.

[0011] A patch fixing device comprises a shell, a nail storage device, a resetting device, a motion handle and a driving device according to any one of the aforementioned technical solutions; at least a part of the driving device is arranged in the shell.

[0012] The nail storage device includes a hollow rod, a track and one or more fixed nails; at least a part of the nail pushing piece is arranged in the hollow rod; each of the one or more fixed nails is coupled to the track; and the nail pushing piece can drive the fixed nail to rotate.

[0013] The present invention provides a driving device for a surgical instrument, which can provide power to a patch fixing device to move the patch fixing pins. The driving device can achieve periodic transmission of motion with a detachable transmission coupling structure, and can prevent the pin pusher assembly from reversing. The present invention also provides a patch fixing device, which can achieve continuous firing of multiple fixing pins by using the above-mentioned driving device, thereby effectively fixing a medical patch at a tissue defect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of a driving device according to a first embodiment of the present invention;

[0015] Figure 2 is a perspective schematic diagram of a driving device according to a first embodiment of the present invention;

[0016] Figure 3 is a partially cutaway side schematic diagram of a driving device according to a first embodiment of the present invention;

[0017] Figure 4 is a perspective schematic diagram of a driving device according to a first embodiment of the present invention;

[0018] Figure 5 is a partially cutaway side schematic diagram of a driving device according to a first embodiment of the present invention;

[0019] Figure 6 is a schematic end view of a partially exploded push pin assembly according to a first embodiment of the present invention;

[0020] Figure 7 is a perspective schematic diagram of a driving device according to a second embodiment of the present invention;

[0021] Figure 8 is an exploded perspective schematic diagram of a driving device according to a second embodiment of the present invention;

[0022] Fig. 9 is a schematic structural diagram of a patch fixing device in a first state according to an embodiment of the present invention;

[0023] Fig.10 is a schematic structural diagram of a patch fixing device in a second state according to an embodiment of the present invention;

[0024] Fig.11 yes Fig.10 A partial cross-sectional view of the nail storage device in the middle dotted circle;

[0025] Fig.12 Schematic diagram of a nail pushing piece and an engaging member according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] Figure 1 1 is a schematic diagram of the structure of a driving device according to the first embodiment of the present invention. The driving device 100 includes: a driving assembly 110, a transmission assembly 120 and a pin pusher assembly 130. The driving assembly 110 is used to drive the transmission assembly 120; the driving assembly 110 includes a rod 111 and a rod 112; the rod 111 and the rod 112 can be connected by a pin and can rotate relative to each other. The transmission assembly 120 includes a sleeve assembly 121, a screw rod 122 and a first face gear 123; the rod 112 is connected to the sleeve assembly 121. The pin pusher assembly 130 includes a pin pusher sheet 131 and a meshing assembly 132.

[0027] Figure 2 is a perspective schematic diagram of a driving device according to a first embodiment of the present invention; Figure 3It is a partially cut-away side view of a driving device according to a first embodiment of the present invention. The sleeve assembly 121 comprises a pin 1211, a first sleeve 1212 and a second sleeve 1213; the first sleeve 1212 is connected to the driving assembly 110; the first sleeve 1212 is sleeved with the second sleeve 1213, and a through slot 1214 is provided on the wall of the second sleeve 1213; the pin 1211 is provided on the first sleeve 1212, and the pin 1211 passes through the through slot 1214 and is coupled to the screw rod 122; the second sleeve 1213 comprises a first baffle 1215 and a second baffle 1216, and the first sleeve 1212 can move between the first baffle 1215 and the second baffle 1216. The meshing assembly 132 includes a third baffle 1321 and a second face gear 1322 ; the second face gear 1322 is fixedly connected to the third baffle 1321 ; the second face gear 1322 and the first face gear 123 are detachably meshed with each other, and the first face gear 123 can drive the push pin assembly 130 to rotate through the second face gear 1322 .

[0028] The first sleeve 1212 includes a connecting portion 1217, which is connected to the rod 112 by a pin, and the two can rotate relative to each other, so that the rod 112 of the driving assembly 110 can drive the first sleeve 1212 to move from the initial state and move from the initial state to the firing completion state. In addition, after the firing is completed, the driving assembly 110 drives the rod 112 to drive the first sleeve to move from the firing completion state to the initial state through the reset structure.

[0029] In the first state (e.g., the initial state), the first face gear 123 and the second face gear 1322 are meshed with each other, and the first sleeve 1212 is at the second baffle 1216. When force is applied to the lower end of the rod 111 of the driving assembly 110, the rod 111 will rotate around the pin, and the upper end of the rod 111 will drive the rod 112 to move, and the rod 112 will generate a driving force on the first sleeve 1212, so that the first sleeve 1212 moves in a direction away from the second baffle 1216. The driving assembly 110 drives the first sleeve 1212. At this time, the pin 1211 provided on the first sleeve 1212 will act on the screw rod 122, driving the screw rod 122 to rotate. Since the first face gear 123 is provided on the screw rod 122, and the first face gear 123 and the second face gear 1322 are meshed with each other, the rotation of the screw rod 122 will cause the push pin assembly 130 to rotate through the second face gear 1322, thereby realizing the transmission of the rotation.

[0030] When the driving assembly 110 drives the first sleeve 1212 to press the second baffle 1216, the second sleeve 1213 moves with the first sleeve 1212. The second sleeve 1213 includes an extension portion 1218, which extends outwardly from the first baffle 1215 in the axial direction. When the extension portion 1218 abuts against the third baffle 1321, the third baffle 1321 is pushed to move with the first sleeve 1212 and the second sleeve 1213. Finally, the first face gear 123 and the second face gear 1322 are separated.

[0031] Figure 4 is a perspective schematic diagram of a driving device according to a first embodiment of the present invention; Figure 5 It is a partially cut-away side schematic diagram of a driving device according to a first embodiment of the present invention. When the first face gear 123 is separated from the second face gear 1322, the rotation of the first face gear 123 will no longer be transmitted to the second face gear 1322, and the driving assembly 110 moves to the end point. Then, the driving assembly 110 is reset to the first state. As the driving assembly 110 is reset, the first sleeve 1212 moves in the opposite direction, and drives the screw rod 122 to rotate in the opposite direction through the pin 1211, and finally the driving device 100 is reset. The positioning separation structure in the driving device 100 is used to prevent the continuous coupling of the first face gear 123 and the second face gear 1322, so as to avoid reversal. Moreover, the structure can repeatedly provide power for the push pin assembly to rotate. The first face gear 123 and the second face gear 1322 are used to provide rotational coupling, and thus can be replaced by splines or other detachable meshing parts.

[0032] Figure 6 1 is a schematic diagram of the disassembled end face of the pin pusher assembly according to the present invention. The pin pusher assembly 130 also includes a meshing member 133, which is disposed on the pin pusher sheet 131; the meshing member 132 also includes a meshing member 1323; the meshing member 133 and the meshing member 1323 are meshed with each other, so that the pin pusher sheet 131 and the meshing member 132 can move independently of each other in a first direction (e.g., an axial direction), and the pin pusher sheet 131 and the meshing member 132 can rotate together. The transmission assembly also includes a connecting hook 124, which can drive the third baffle 1321 to move in at least one direction, and is used to pull the meshing member 132 back during the process of returning the firing completion state to the initial state. In this embodiment, the connecting hook 124 can provide a driving force opposite to the second sleeve 1213, so as to pull the meshing member 132 back and complete the resetting of the drive device.

[0033] Figure 7 is a perspective schematic diagram of a driving device according to a second embodiment of the present invention; Figure 8The first face gear and the second face gear used for providing rotational coupling in the second embodiment are replaced by the first element 225 and the second element 2324 for meshing, respectively, to achieve the transmission of rotation.

[0034] Fig. 9 3 is a schematic structural diagram of a patch fixing device in a first state according to an embodiment of the present invention. Fig.10 1 is a schematic diagram of the structure of a patch fixing device in a second state according to an embodiment of the present invention. The patch fixing device includes a drive device 100, a shell 101, a motion handle 102, a reset spring 103 and a nail storage 104. At least a portion of the drive device 100 is disposed in the shell 101. The rod 111 is fixed on the shell 101 by a pin. The motion handle 102 is pinched, and the motion handle 102 drives the rod 111 to rotate around the pin, and the rod 111 drives the rod 112 to move, thereby realizing power input. Although the drive device is listed in a specific manner in the above embodiment, the drive device can also realize the driving of the first sleeve by pulling the first sleeve by the transmission rod.

[0035] The connection between the rod 111 and the rod 112 is also connected to the reset spring 103, which acts as a reset component, and can realize the recovery of the patch fixing device from the firing completion state to the initial state, so as to prepare for the firing of the next fixing nail. When the motion handle 102 is pinched, the driving rod 111 rotates around the pin, and the reset spring 103 is stretched. When the motion handle 102 is released, the reset spring 103 contracts, pulling the driving rod 111 to move in the opposite direction, so that the driving device returns to the initial state, completing a complete driving cycle, and preparing for the next firing.

[0036] Although the reset structure is described in a specific manner in the above embodiment, the reset structure of the patch fixing device can also adopt other structures, such as using a reset spring to drive the rod 111 or 112 to achieve reset, or using a V-shaped spring to drive the motion handle 102 to achieve reset. The motion handle can provide the original driving force in a translational manner in addition to rotation.

[0037] Fig.11 yes Fig.10 A partial cross-sectional view of the nail storage device in the middle dotted circle; Fig.121 is a schematic diagram of a nail pushing piece and an engaging member according to an embodiment of the present invention. The nail storage device 104 includes a hollow rod 1041, a track 1042 and one or more fixed nails 1043; at least a portion of the nail pushing piece 131 is disposed in the hollow rod 1041, and the nail pushing piece includes a rod portion and a nail clamping structure. The nail clamping structure is coupled to the fixed nail. When the nail pushing assembly rotates, the nail clamping structure directly acts on the fixed nail to cause it to rotate. Each fixed nail 1043 includes a protrusion, which is engaged with the track 1042; the fixed nail 1043 can rotate with the nail pushing piece 131, and move under the action of the track 1042, and can penetrate the surface of human tissue and fix it.

[0038] Hernia fixation nails can use absorbable or non-absorbable fixation nails. The materials used for absorbable nails include degradable polymer materials such as polylactic acid (PLA), polyglycolic acid (PGA), glycolic acid-lactic acid copolymer (PLGA), or their mixtures. The surface of the absorbable nail can be coated with a lubricating coating to reduce the friction resistance between the patch or tissue, which helps the absorbable nail to enter the tissue. The lubricating coating may include collagen, aliphatic polyester, poly (amino acid), copoly (ether-ester), polyoxyalkylene oxalate, polyamide or a mixture thereof. The surface of the absorbable nail can also be coated with an antibacterial substance to prevent infection. The drive device can be used in surgical instruments that require periodic rotation drive.

[0039] The above is an explanation of the preferred embodiments of the present invention, but it cannot be understood as a limitation of the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A driving device for a surgical instrument, comprising a driving assembly, a transmission assembly and a pin pushing assembly; The driving assembly is used to drive the transmission assembly; The transmission assembly includes a sleeve assembly, a screw rod and a first engagement member; the sleeve assembly includes a pin, a first sleeve and a second sleeve; the first sleeve is connected to the driving assembly; the first sleeve is sleeved with the second sleeve, and a through groove is provided on the wall of the second sleeve; the pin is provided on the first sleeve, and the pin passes through the through groove and is coupled to the screw rod; the second sleeve includes a first stopper and a second stopper, and the first sleeve can move between the first stopper and the second stopper; the first engagement member is provided and connected to the screw rod; The nail pushing assembly includes a nail pushing sheet and an engaging assembly, and the engaging assembly includes a third stopper and a second engaging member; The second engaging member and the first engaging member are engaged with each other in a detachable manner, and the first engaging member can drive the second engaging member to rotate; the nail pushing plate is coupled to the engaging component, so that the nail pushing plate and the engaging component can move independently in a first direction, and the nail pushing plate and the engaging component can rotate together.

2. The driving device of the surgical instrument according to claim 1, characterized in that: The second sleeve includes an extension portion, and the extension portion is capable of abutting against the third stopper portion and driving the engagement assembly to separate from the first engagement member.

3. The driving device of the surgical instrument according to any one of claims 1 to 2, characterized in that: The pin pushing assembly further comprises a third engaging member, and the third engaging member is arranged on the pin pushing sheet; the engaging assembly further comprises a fourth engaging member; the third engaging member and the fourth engaging member are engaged with each other.

4. The driving device of the surgical instrument according to any one of claims 1 to 2, characterized in that: The transmission assembly further comprises a connecting hook, and the connecting hook can drive the third stopper to move in at least one direction.

5. The driving device of the surgical instrument according to any one of claims 1 to 2, characterized in that: The second engagement member is fixedly connected to the third stop portion; or the second engagement member is integral with the third stop portion.

6. The driving device of the surgical instrument according to any one of the preceding claims 1-2, characterized in that: The driving assembly includes a first driving member and a second driving member; the first driving member is connected to the second driving member in a relatively rotatable manner; the first sleeve includes a connecting portion, and the connecting portion is connected to the second driving member in a relatively movable manner.

7. A patch fixing device, characterized in that: The patch fixing device comprises a shell, a nail storage device, a resetting device, a motion handle and a driving device according to any one of claims 1 to 6; at least a part of the driving device is arranged in the shell.

8. The patch fixing device according to claim 7, characterized in that: The nail storage device comprises a hollow rod, a track and one or more fixing nails; at least a portion of the nail pushing sheet is disposed in the hollow rod; each of the one or more fixing nails is coupled to the track; The nail pushing piece can drive the fixing nail to rotate.

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