Skew head surgical instrument

Abstract

A skew head surgical instrument comprises a handle assembly and an inner core assembly, and the handle assembly comprises a rotating wheel assembly and a button assembly. The inner core assembly comprises a first skew jaw, a second skew jaw, a base and a driving mechanism; the near end of the first oblique jaw comprises a first jaw tail limited by a first inner side face and a first outer side face which are parallel to each other, one end of the first jaw elbow is connected with the first jaw tail into a whole, and the other end of the first jaw elbow obliquely extends towards the outside of the first inner side face to the first jaw head to form a first jaw body; the near end of the second oblique jaw comprises a second jaw tail limited by a second inner side face and a second outer side face which are parallel to each other, one end of the second jaw elbow is connected with the second jaw tail into a whole, and the other end of the second jaw elbow obliquely extends towards the outside of the second inner side face to the second jaw head to form a second jaw body; the base comprises a base shoulder, a first arm and a second arm, wherein the first arm and the second arm are connected with the base shoulder and extend towards the far end. The first jaw tail and the second jaw tail are stacked on each other and mounted between the first arm and the second arm.

Description

Technical Field

[0001] This invention relates to minimally invasive surgical instruments, and more particularly to a handheld laparoscopic instrument. Background Technology

[0002] Laparoscopic single-port surgery involves inserting and removing a laparoscope and multiple instruments through a single incision in the patient's body wall to complete the surgical procedure. Typically, a single-port multi-channel device is inserted into the single incision as the channel for instruments to enter and exit the body. Currently, laparoscopic single-port surgery faces two major challenges: first, the feasibility of operation at arbitrary extreme angles within a hemispherical space; and second, the interference problem between multiple instruments in a very small space (referred to as the "chopstick effect"). To date, there are no reliable solutions. Utility Model Content

[0003] Therefore, in order to solve the problems of existing technologies, multiple solutions are proposed.

[0004] In one aspect of the invention, a surgical instrument for tilting the jaw is provided, comprising a handle assembly and an inner core assembly. The handle assembly includes a rotary wheel assembly and a button assembly. The inner core assembly includes a first tilted jaw, a second tilted jaw, a base, and a drive mechanism. The proximal end of the first tilted jaw includes a first jaw tail defined by a first parallel medial surface and a first lateral surface. One end of a first jaw elbow is integrally connected to the first jaw tail, and the other end extends obliquely outward toward the first medial surface to a first jaw head and forms a first jaw body. The proximal end of the second tilted jaw includes a second jaw tail defined by a second parallel medial surface and a second lateral surface. One end of a second jaw elbow is integrally connected to the second jaw tail, and the other end extends obliquely outward toward the second medial surface to a second jaw head and forms a second jaw body. The base includes a base shoulder and a first arm and a second arm connected thereto and extending distally; the first jaw tail and the second jaw tail are stacked on top of each other and mounted between the first arm and the second arm; the drive mechanism is connected to the first jaw tail and the second jaw tail respectively, and the movement drive mechanism can force the first jaw tail and the second jaw tail to rotate together or rotate open relative to each other, thereby forcing the first jaw body and the second jaw body to rotate together or rotate open relative to each other.

[0005] In one embodiment, the first jaw body and the first inner surface form an acute angle ANG1, where 15°≤A11≤75°; the second jaw body and the second inner surface form an acute angle ANG2, where 15°≤ANG2≤75°.

[0006] In another scheme, with the first and second jaw bodies of the inner core assembly in contact with each other, the smallest circumscribed circle diameter of the inner core assembly is measured as D1 by projection along the axis of the inner core assembly, and the smallest circumscribed cylindrical surface diameter of the first jaw tail is measured as D11, where 1.5×D11≤D1≤2.5×D11.

[0007] In another scheme, with the first and second jaw bodies of the inner core assembly in contact with each other, the smallest circumscribed circle diameter of the inner core assembly is measured as D1 by projection along the axis of the inner core assembly, and the smallest circumscribed cylindrical surface diameter of the first jaw tail is measured as D11, where 2.5×D11≤D1≤4×D11.

[0008] In another embodiment, the base further includes a hollow outer tube connected thereto and extending towards the proximal end. The hollow outer tube includes an outer tube head and an outer tube tail, and an outer tube body extending therebetween. An axial through hole extends axially through the outer tube head and the outer tube tail. The drive mechanism further includes a drive rod, which includes a drive head, a drive tail, and a drive bar extending therebetween. The outer tube tail is matched with a rotating wheel assembly and a button assembly. The drive tail is connected to a second handle. The first and second handles rotate about the handle pivot, thereby pulling the drive rod to move, which in turn pushes its drive head to move, thereby forcing the first and second jaw tails to rotate together or rotate apart, thereby forcing the first and second jaw bodies to rotate together or rotate apart.

[0009] In another scheme, the length from the first clamp tip to the rotating wheel is measured along the axis of the inner core assembly as L1; the minimum circumscribed circle diameter of the inner core assembly is measured by projecting along the axis of the inner core assembly as D1; ​​satisfying the relationship 0.04≤D1 / L1≤0.07.

[0010] In another scheme, the length from the first clamp tip to the rotating wheel is measured along the axis of the inner core assembly as L1; the minimum circumscribed circle diameter of the inner core assembly is measured by projecting along the axis of the inner core assembly as D1; ​​satisfying the relationship 0.07≤D1 / L1≤0.10. Attached Figure Description

[0011] To gain a fuller understanding of the essence of the present invention, a detailed description will be provided below in conjunction with the accompanying drawings, wherein:

[0012] Figure 1 This is a 3D schematic diagram of device 1;

[0013] Figure 2 This is a 3D schematic diagram of the inner core component 3;

[0014] Figure 3 This is an exploded view of the inner core component 3;

[0015] Figure 4 This is a 3D schematic diagram of clamp 300;

[0016] Figure 5 This is a 3D schematic diagram of the clamp 400;

[0017] Figure 6 It is a projected view of the clamp 300 facing the first outer side;

[0018] Figure 7This is a side projection view of clamp 300;

[0019] Figure 8 It is a projected view of the clamp 400 facing the first outer side;

[0020] Figure 9 This is a side projection view of the clamp 400;

[0021] Figure 10 It is a broken view of the side projection view of the inner core component 3;

[0022] Figure 11 yes Figure 11 Sectional view 12-12;

[0023] Figure 12 yes Figure 11 Sectional view 13-13;

[0024] Figure 13 This is a partial projected view of the rotating wheel and inner core assembly of instrument 1;

[0025] Figure 14 This is a partial cross-sectional view of the inner core assembly and the handle assembly in tandem;

[0026] In all views, the same label indicates the same part or component. Detailed Implementation

[0027] Embodiments of the invention are disclosed herein; however, it should be understood that the disclosed embodiments are merely examples of the invention, and the invention can be implemented in different ways. Therefore, the disclosure herein is not to be construed as limiting, but rather serves only as the basis for the claims and as a means of teaching those skilled in the art how to use the invention.

[0028] refer to Figure 1 For ease of description, the side closer to the operator will be defined as the proximal end, and the side farther from the operator will be defined as the distal end. During laparoscopic surgery, a trocar assembly (not shown) is typically used to create a surgical channel in the patient's body wall for instruments to enter and exit. Various minimally invasive instruments, such as Instrument 1, can be inserted into the body cavity through the channel formed by the trocar assembly. One or more trocar assemblies may need to be used simultaneously during the procedure, and Instrument 1 may also be configured in one or more configurations for simultaneous operation as needed.

[0029] Figures 1-3 A surgical instrument for tilted head is described, comprising a handle assembly 2 and an inner core assembly 3. The inner core assembly 3 includes a base 100, a first tilted jaw 300, a second tilted jaw 400, and a drive mechanism 500.

[0030] For reference Figure 2-3 and combined Figure 11The base 100 includes a base shoulder 101 and a first arm 102 and a second arm 103 connected thereto and extending distally; the first and second arms define a mounting chamber 104; a first transverse hole 105 extends laterally through the first arm 102, and a second transverse hole 106 extends laterally through the second arm 103; a base shaft hole 107 extends axially through the base shoulder 101 and communicates with the mounting chamber 104.

[0031] Figures 4-9 The structure and composition of the first crooked jaw 300 and the second crooked jaw 400 are described.

[0032] The proximal end of the first skewed jaw 300 includes a first jaw tail 303 defined by a first inner surface 301 and a first outer surface 302 that are parallel to each other. One end of a first jaw elbow 304 is integrally connected to the first jaw tail, and the other end extends obliquely outward toward the first inner surface to a first jaw head 309 and forms a first jaw body 305. Those skilled in the art will appreciate that the shape of the first jaw body 305 is generally an irregular geometry, but fitting or wrapping 70% or more of the first jaw body with a regular geometric shape, and the overall trend should form an acute angle ANG1 with the first inner surface 311. The first jaw tail 303 also includes a first abutment hole 306 and a first tail hole 307 that penetrate it laterally.

[0033] The proximal end of the second crooked jaw 400 includes a second jaw tail 403 defined by a second parallel inner surface 401 and a second outer surface 402. One end of the second jaw elbow 404 is integral with the second jaw tail, and the other end extends obliquely outward toward the second inner surface to the second jaw head 409 and forms the second jaw body 405. The shape of the second jaw body 405 is generally irregular geometry, but it fits or wraps 70% or more of the second jaw body with a regular geometric shape, and the overall trend should form an acute angle ANG2 with the second inner surface 311. The second jaw tail 403 also includes a second abutment hole 406 and a second tail hole 407 that penetrate it laterally.

[0034] Figure 2 , Figure 3 , Figure 10 and Figure 11 The structural composition and assembly relationship of the inner core assembly 3 are described. The first jaw tail 303 and the second jaw tail 403 are stacked on each other and sandwiched between the first arm 102 and the second arm 103 of the base; the main pin 10 passes through the first base hole and the second base hole, fixing the first and second jaw tails together and forming a main rotating pair that can rotate around the main pin.

[0035] Next, refer to Figure 3 , Figure 10 , Figure 11 and Figure 12The drive mechanism 500 includes a drive rod 510, a first connecting rod 530, and a second connecting rod 550. The drive rod 510 includes a drive head 511, a drive tail 519, and a drive bar 517 extending therebetween. The drive head 511 includes a first drive shaft 513 and a second drive shaft 515 extending laterally outward. The drive tail 519 includes a drive rod annular groove 518. The first connecting rod 530 includes a first connecting rod head 531, a first connecting rod tail 533, and a first connecting rod body 532 extending therebetween; the first connecting rod head 531 includes a first connecting rod shaft 535 extending laterally outward, and the first connecting rod tail 533 includes a first connecting rod hole 537 extending laterally through it. The second connecting rod 550 includes a second connecting rod head 551, a second connecting rod tail 553, and a second connecting rod body 552 extending therebetween; the second connecting rod head 551 includes a second connecting rod shaft 555 extending laterally outward, and the second connecting rod tail 553 includes a second connecting rod hole 557 extending laterally through it.

[0036] Next, refer to Figure 10 , Figure 11 and Figure 12 The first connecting rod shaft 535 penetrates the first tail hole 307, connecting the first connecting rod head 531 and the first jaw tail 303 together to form a first driven pair that can rotate around the first connecting rod shaft. The second connecting rod shaft 555 penetrates the second tail hole 407, fixing the second connecting rod head 551 and the second jaw tail 403 together to form a second driven pair that can rotate around the second connecting rod shaft. The first drive shaft 513 penetrates the first connecting rod hole 537, fixing the first connecting rod tail 533 and the drive head 511 together to form a first drive pair that can rotate around the first drive shaft. The second drive shaft 515 penetrates the second connecting rod hole 557, fixing the second connecting rod tail 553 and the drive head 511 together to form a second drive pair that can rotate around the second drive shaft. Pulling the drive rod 510 allows the first and second drive pairs, the first and second driven pairs, and the main rotating pair to rotate simultaneously. When the moving drive head 511 moves, it drives the first and second connecting rods to move and rotate, causing the first and second jaw tails to rotate, thereby achieving the closing or opening of the first and second jaw bodies.

[0037] Next, refer to Figure 2 , Figure 3 , Figure 10 and Figure 11The base 100 further includes a hollow outer tube 150 connected thereto and extending toward its proximal end. The hollow outer tube 150 includes an outer tube head 151 and an outer tube tail 153, and an outer tube body 152 extending therebetween. An axial through hole 154 extends axially through the outer tube head and the outer tube tail. The outer tube tail further includes an outer tube annular groove 155 and an adapter 156. The hollow outer tube 150 may also include an insulating tube 159 mounted on its surface. The base 100 and the hollow outer tube 150 may be fixed together from multiple parts by welding, riveting, or bonding, or may be machined from a single metal substrate.

[0038] Then combine Figure 1 , Figure 13 and Figure 14 Understood. The handle assembly 2 includes a first handle 92 and a second handle 93 connected by a handle pivot 91, the first and second handles being rotatable about the handle pivot. The wheel assembly 95 includes a wheel 951, an outer sleeve 953, and an inner sleeve 955. The outer sleeve 953 is integrally connected to the wheel 951, and the inner sleeve 955 is integrally connected to the first handle 92. The outer sleeve 953 and the inner sleeve 955 constitute a rotating mechanism that allows the wheel 951 to rotate relative to the first handle. The button assembly 97 is installed in the button mounting chamber 98 of the first handle 92. The button assembly 97 includes a locking member 972, one end of which is connected to an elastic element 971 and the other end of which is connected to a button 974. A fastener 973 restricts the locking member 972 within the mounting chamber 98, and the elastic element 971 drives the locking member 972 to move laterally within the mounting chamber 98 to the locked position. The handheld device 1 includes a handle assembly 2 and an inner core assembly 3. The drive tail 519 is matched with the second handle 93. The elastic element 971 drives the locking member 972 to move laterally within the mounting chamber 98 to the locking position and match the limiting groove 48. The adapter 156 matches the rotating wheel 951 and transmits rotational torque to the inner core assembly. The first and second handles rotate around the handle axis, thereby pushing the drive tail 519 to move axially, which in turn pushes the drive head to move axially, thereby driving the first and second connecting rods to move and rotate, causing the first and second jaw tails to rotate, realizing the closure or opening of the first and second tilted jaws. Pressing the button 97 compresses the elastic element 971, causing the locking member 972 to move laterally away from the locking position, disengaging the limiting groove 48 from the locking member 972, thereby separating the inner core assembly 3 and the handle assembly 2.

[0039] Existing gripping forceps, as disclosed in the technology, primarily function by applying tension along their axis to drive two forceps to clamp (grip) tissue. Pulling tissue from distal to proximal along the axial direction yields the highest operational efficiency. One aspect of this invention involves designing a tilted-head surgical instrument at a certain angle to the instrument's axis, pushing tissue from proximal to distal. One instrument pushes the tissue obliquely upwards from proximal to distal, while the other instrument pushes it obliquely downwards, thereby exposing the target lesion area. In this mode of operation, the tissue is pushed towards a direction where the exposed area becomes increasingly larger and clearer.

[0040] like Figure 7 , Figure 9 , Figure 10 , Figure 11 and Figure 12 As shown, in a preferred embodiment, the first jaw body and the first inner surface form an acute angle ANG1, where 15°≤ANG1≤75°; the second jaw body and the second inner surface form an acute angle ANG2, where 15°≤ANG2≤75°. This angle range is beneficial for visual exposure during the pushing and separating operation of surgical instruments for tilted heads in clinical applications.

[0041] In another design of a surgical instrument for a short-snouted, tilted head, with the first and second jaw bodies of the inner core assembly in contact with each other, the smallest circumscribed circle diameter of the inner core assembly is measured as D1 by projection along the axis of the inner core assembly, and the smallest circumscribed cylindrical surface diameter of the first jaw tail is measured as D11, where 1.5×D11≤D1≤2.5×D11. This dimensional design is beneficial for both visual exposure during push-and-pull separation operations and for passage through specific channels.

[0042] In another design of a surgical instrument for a long-snouted, tilted head, with the first and second jaw bodies of the inner core assembly in contact with each other, the smallest circumscribed circle diameter of the inner core assembly is measured as D1 by projection along the axis of the inner core assembly, and the smallest circumscribed cylindrical surface diameter of the first jaw tail is measured as D11, where 2.5 × D11 ≤ D1 ≤ 4 × D11. This dimensional design is beneficial for both visual exposure during push-and-pull separation operations and for passage through specific channels.

[0043] Those skilled in the art will understand that during laparoscopic dissection and exposure procedures, the surgeon typically holds one instrument in each hand, with the two instruments working together to complete the dissection and exposure. The aforementioned short-snouted, tilted-head surgical instrument is suitable as the primary dissection instrument, while the aforementioned long-snouted, tilted-head forceps surgical instrument serves as its assisting dissection instrument.

[0044] like Figure 10-13As shown, in another design of a short-snouted, tilted-head surgical instrument, the length from the first forceps tip to the rotating wheel, measured along the axis of the inner core assembly, is L1; the minimum circumscribed circle diameter of the inner core assembly, projected along its axis, is D1; ​​satisfying the relationship 0.04≤D1 / L1≤0.07. In another design of a long-snouted, tilted-head surgical instrument, the length from the first forceps tip to the rotating wheel, measured along the axis of the inner core assembly, is L1; the minimum circumscribed circle diameter of the inner core assembly, projected along its axis, is D1; ​​satisfying the relationship 0.07≤D1 / L1≤0.10. This design facilitates visual exposure during push-and-pull separation operations, facilitates passage through specific channels, and ensures that the overall control and tactile feedback during use by the doctor remains consistent with or similar to traditional grasping forceps.

[0045] Those skilled in the art should be able to recognize that the base, drive mechanism, etc., can be adaptively modified using the disclosed prior art to replace the corresponding structures in the aforementioned examples, thus forming new implementation schemes.

[0046] For example, an adaptive modification can be made to the dual-column structure disclosed in US20090259248A1: the first mandibular tail includes a first base column, the second mandibular tail includes a second base column, the first arm of the base includes a first side hole, and the second arm of the base includes a second side hole. The first base column and the first side hole constitute a first main revolute joint, and the second base column and the second side hole constitute a second main revolute joint. The first and second main revolute joints replace the aforementioned main revolute joints, constituting a new implementation scheme.

[0047] For example, an adaptive modification can be made to the sliding drive structure disclosed in US5849022A. The first mandibular tail includes a first tail post (replacing the first tail hole), and the second mandibular tail includes a second tail post (replacing the second tail hole). The drive mechanism includes a drive block defined by a first drive surface and a second drive surface, and also includes a first drive groove recessed into the drive block by the first drive surface, and a second drive groove recessed into the drive block by the second drive surface. The first drive groove and the first tail post match to form a first drive pair, and the second drive groove and the second tail post match to form a second drive pair. When the drive mechanism is moved, the drive block moves, causing the first and second drive pairs to rotate and slide simultaneously, thereby driving the first and second mandibular tails to rotate relative to each other, thus achieving the closing or opening of the first and second mandibular bodies.

[0048] More solutions are conceivable, so they will not be exhaustively listed. These rotating and driving mechanisms are equivalent. In general, the base includes a base shoulder and a first and a second arm connected thereto and extending distally; the first and second jaw tails are stacked on top of each other and mounted between the first and second arms; the driving mechanism is connected to the first and second jaw tails respectively, and the moving driving mechanism can force the first and second jaw tails to rotate together or open relative to each other, thereby forcing the first and second jaw bodies to rotate together or open relative to each other.

[0049] US patents US5489290, US5951996, US6340365, US7931667, US8551077, and US8926599 disclose various quick-connect and disconnect mechanisms for the inner core assembly and the reusable handle. These mechanisms, with slight modifications, can all be used to connect the inner core assembly and the reusable handle of this invention. To date, the field of minimally invasive surgical instruments has disclosed many connection methods between the inner core assembly and the handle of minimally invasive surgical instruments. With slight modifications, these methods can all be used to connect the inner core assembly and the handle of this invention, and will not be exhaustive here. Those skilled in the art should understand that the first, second, etc., are not in a strict order, but are used only for the sake of simplicity and accuracy, and for ease of understanding.

Claims

1. A skew head surgical instrument comprising a handle assembly and an inner core assembly, the handle assembly comprising a rotating wheel assembly and a button assembly, characterized in that: 1) the inner core assembly comprises a first skew jaw, a second skew jaw, a base and a driving mechanism; 2) the proximal end of the first skew jaw comprises a first jaw tail defined by a first inner side and a first outer side which are parallel to each other, one end of a first jaw elbow is integral with the first jaw tail, and the other end thereof extends obliquely towards the outside of the first inner side to a first jaw head and forms a first jaw body; 3) the proximal end of the second skew jaw comprises a second jaw tail defined by a second inner side and a second outer side which are parallel to each other, one end of a second jaw elbow is integral with the second jaw tail, and the other end thereof extends obliquely towards the outside of the second inner side to a second jaw head and forms a second jaw body; 4) the base comprises a base shoulder and a first arm and a second arm connected thereto and extending distally; the first jaw tail and the second jaw tail are stacked with each other and are mounted between the first arm and the second arm; the driving mechanism is connected with the first jaw tail and the second jaw tail respectively, and moving the driving mechanism can force the first jaw tail and the second jaw tail to rotate and close or rotate and open each other, thereby forcing the first jaw body and the second jaw body to rotate and close or rotate and open each other.

2. A skewing head surgical instrument as claimed in claim 1, characterized in that: The first jaw body forms an acute angle ANG1 with the first inner side, wherein 15°≤ANG1≤75°; the second jaw body forms an acute angle ANG2 with the second inner side, wherein 15°≤ANG2≤75°.

3. The skewed head surgical instrument of claim 1, wherein: In the state that the first jaw body and the second jaw body of the inner core assembly are in close contact with each other, the minimum circumscribed circle diameter of the inner core assembly is measured along the axis of the inner core assembly, and the diameter D11 of the minimum circumscribed cylindrical surface of the first jaw tail is measured, wherein 1.5×D11≤D1≤2.5×D11.

4. The skewed head surgical instrument of claim 1, wherein: In the state that the first jaw body and the second jaw body of the inner core assembly are in close contact with each other, the minimum circumscribed circle diameter of the inner core assembly is measured along the axis of the inner core assembly, and the diameter D11 of the minimum circumscribed cylindrical surface of the first jaw tail is measured, wherein 2.5×D11≤D1≤4×D11.

5. The skew head surgical instrument according to claim 1, characterized in that: 1) the base further comprises a hollow outer tube connected thereto and extending proximally, the hollow outer tube comprises an outer tube head and an outer tube tail and an outer tube body extending therebetween, an axial through hole penetrates the outer tube head and the outer tube tail along the axial direction; the driving mechanism further comprises a driving rod, the driving rod comprises a driving head, a driving tail and a driving rod extending therebetween; 2) the outer tube tail is matched with the rotating wheel assembly and the button assembly, and the driving tail is connected with the second handle; rotating the first handle and the second handle around the handle rotation shaft, thereby pulling the driving rod to move, and then pushing the driving head of the driving rod to move, and then forcing the first jaw tail and the second jaw tail to rotate and close or rotate and open each other, thereby forcing the first jaw body and the second jaw body to rotate and close or rotate and open each other.

6. A misaligned head surgical instrument as in claim 5, wherein: The length of the first jaw tip to the rotating wheel is measured along the axis of the inner core assembly as L1; the minimum circumscribed circle diameter of the inner core assembly is measured along the axis of the inner core assembly as D1; and the relationship 0.04≤D1 / L1≤0.07 is satisfied.

7. The skewback instrument of claim 5 wherein: The length of the first jaw tip to the rotary wheel measured along the axis of the inner core assembly is L1; the diameter of the minimum circumscribed circle of the inner core assembly projected and measured along the axis of the inner core assembly is D1; the relationship 0.07≤D1 / L1≤0.10 is satisfied.

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