Surgical fastener applying apparatus with lockout assembly
By introducing a selective engagement mechanism between the locking assembly and the push plate into the surgical fastener application device, the problem of false triggering when no fastener is loaded in the existing device is solved, and safe, reliable, and efficient operation is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- COVIDIEN LP
- Filing Date
- 2021-09-16
- Publication Date
- 2026-06-30
AI Technical Summary
Existing surgical fastener application devices lack an effective locking mechanism when using disposable parts, which makes the device prone to accidental triggering when no fastener is loaded, affecting safety and efficiency.
A surgical fastener application device is designed, comprising a reusable anvil half and a staple cartridge receiving half, combined with a locking assembly and a push plate. The selective engagement of the locking assembly with the push plate prevents accidental triggering when the single-use loading unit is not loaded.
It enables effective locking of the push plate before loading a single-use loading unit, preventing accidental firing, improving the safety and efficiency of the device, and is suitable for the combined use of reusable and disposable components.
Smart Images
Figure CN114191017B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to a surgical fastener application device, and more specifically, to a surgical fastener application device having reusable and disposable components. Background Technology
[0002] Surgical fastener application devices, in which tissue is first grasped or clamped between opposing jaw structures and then engaged by surgical fasteners, are known in the art. In some such devices, a blade is provided to cut the tissue already engaged by the fasteners. The fasteners are typically in the form of surgical staples, but other surgical fasteners, such as clamps or two-part composite surgical fasteners, may also be used.
[0003] Surgical fastener application devices typically include two elongated beam members for capturing or clamping tissue therebetween. Typically, one beam member carries a disposable staple cartridge assembly that accommodates a plurality of sutures arranged in at least two transverse rows, while the other beam member has an anvil that defines a surface for forming suture legs when the sutures are driven from the staple cartridge assembly. In the case of a two-part fastener, the beam member including the anvil carries the mating portion of the two fastener parts, such as a receiver. Typically, the suture forming process is influenced by the interaction between one or more longitudinally moving cam members and a series of individual suture pushers. As the cam members travel longitudinally through the staple cartridge-carrying beam member, the individual pusher members are biased upwards into the rear span of the sutures supported within the staple cartridge assembly to sequentially eject the sutures from the staple cartridge. A blade may be provided to travel with the cam members between rows of sutures to cut tissue between the rows of sutures. An example of such an instrument is disclosed in U.S. Patent No. 7,631,794, which is incorporated herein by reference in its entirety. Summary of the Invention
[0004] According to one aspect of this disclosure, a surgical fastener application device includes an anvil half, a cartridge receiving half defining an elongated channel member, a firing assembly including a push plate, and a locking assembly. The elongated channel member is configured to receive a single-use loading unit (SULU). The locking assembly is supported within the elongated channel member and includes a locking member that selectively engages with the push plate to prevent movement of the push plate relative to the locking member when the SULU is not supported within the elongated channel member.
[0005] In some aspects, the locking member is pivotally coupled to the wall of the elongated channel member. The locking member is movable between a locked position and an unlocked position. In the locked position, the locking member prevents the push plate from translating distally through the locking member. The locking member may define a push plate channel therethrough. The push plate channel may be arranged to align with the push plate. The push plate may define a locking recess, and the locking member may include proximal teeth that are selectively received within the locking recess. When the proximal teeth are received within the locking recess, the proximal teeth prevent the push plate from advancing through the push plate channel.
[0006] In some aspects, the locking assembly may include a spring that pushes the locking member into a locked position when the SULU is not positioned in the elongated channel member. The locking member may include an arm that engages a stop extending from the elongated channel member. The stop may be configured to limit clockwise pivoting rotation of the locking member.
[0007] In some respects, the locking assembly can prevent distal translation of the push plate. The locking assembly can vertically constrain the push plate.
[0008] According to another embodiment, the surgical fastener application device includes an anvil half, a cartridge receiving half defining an elongated channel member, a push plate, and a locking member. The elongated channel member is configured to receive a single-use loading unit (SULU). The locking member selectively engages with the push plate. When the locking member engages with the push plate, the push plate is restricted in both the vertical and horizontal directions to prevent triggering of the surgical fastener application device when the SULU is not supported in the elongated channel member.
[0009] According to another aspect, the surgical fastener application device includes an anvil half, a cartridge receiving half defining an elongated channel member, a firing assembly including a push plate, and a locking assembly. The elongated channel member is configured to receive a single-use loading unit (SULU). The locking assembly is supported in the elongated channel member and includes a locking member movable between a first position and a second position to selectively block the push plate of the firing assembly when the SULU is not supported in the elongated channel member.
[0010] In one position, the teeth of the locking member can be accommodated within a locking groove of the push plate to restrict horizontal and vertical movement of the push plate. In a second position, the push plate can be configured to advance distally through a push plate channel defined by the locking member.
[0011] The following drawings and description set forth one or more aspects of this disclosure in detail. Other aspects, features, and advantages will become apparent from the following description, drawings, and claims. Attached Figure Description
[0012] Embodiments of this disclosure are illustrated in conjunction with the accompanying drawings, which are incorporated in and form part of this specification, and together with the detailed description of the embodiments given below, serve to illustrate the principles of this disclosure.
[0013] Figure 1 This is a perspective view of a surgical fastener application device based on the principles of this disclosure;
[0014] Figure 2 for Figure 1 A perspective view showing the separation of parts in the surgical fastener application device;
[0015] Figure 3 yes Figure 1 A perspective view of a portion of the surgical fastener application device, with the locking assembly in the locked position;
[0016] Figure 4 yes Figure 3 The enlarged perspective view of the indicated detail area shown in the image;
[0017] Figure 5 yes Figure 1 A side perspective view of the surgical fastener application device, showing the elongated channel component and firing assembly separated, with the firing assembly shown as having supports thereon. Figure 3 The locking element of the locking assembly;
[0018] Figure 6 yes Figure 5 The enlarged view showing the detailed area is shown.
[0019] Figure 7 yes Figure 5 Locking parts and Figure 5 A perspective view of the distal portion of the push plate of the firing assembly, with parts separated.
[0020] Figure 8 It is along Figure 5 The section line 8-8 is cut off Figure 5 Enlarged cross-sectional view of the slender channel component;
[0021] Figure 9-12 This is a progressive view illustrating a single-use loading unit that is fixed to a slender channel member and positions the locking assembly in the unlocked position. Detailed Implementation
[0022] Aspects of this disclosure are described in detail with reference to the accompanying drawings, wherein like reference numerals refer to the same or corresponding elements in each of the several views. Furthermore, the terms "proximal" or "tail" refer to the structural portion closer to the clinician, while the terms "distal" or "anterior" refer to the structural portion farther from the clinician. It is well known that the term "clinician" refers to a physician (e.g., a surgeon), nurse, or any other care provider, and may include support staff.
[0023] In the following description, well-known functions or structures are not described in detail in order to avoid obscuring this disclosure with unnecessary details.
[0024] refer to Figure 1-12 and as Figure 1 and Figure 2 As best shown, the surgical suture or surgical fastener application device 10 defines a longitudinal axis "L" and includes an anvil half 12 with an anvil 12a, a cartridge receiving half 14, a clamping rod 16, a single-use loading unit 18 (hereinafter referred to as "SULU"), a firing assembly 20, and a locking assembly 100 with a locking member 110 and a spring 120 (e.g., a torsion spring). When the SULU 18 is not loaded into the cartridge receiving half 14, the locking assembly 100 prevents the surgical suture 10 from firing. In various aspects, the anvil half 12, the cartridge receiving half 14, and the clamping rod 16 are configured as reusable components and, therefore, can be made of biocompatible materials suitable for sterilization and reuse, such as stainless steel. Conversely, the SULU 18 and the firing assembly 20 are configured as single-use and, therefore, can be made of any suitable biocompatible material with the required strength properties, such as plastics, metals, or combinations thereof. For a more detailed description of similar surgical sutures, one or more components of which may be included in or modified for use with surgical suture 10, reference may be made to U.S. Patent Nos. 10,512,461 and 7,631,794, the entire contents of which are incorporated herein by reference.
[0025] Brief Reference Figure 7 The firing assembly 20 includes a firing lever assembly 20a having a pusher plate 20b extending distally from the firing lever assembly 20a. The pusher plate 20b extends distally to a distal finger 20c and defines a finger-shaped groove 20d proximal to the distal finger 20c. The pusher plate 20b also includes an elongated ridge 20e along its top surface. The elongated ridge 20e defines a locking groove 20f therein.
[0026] refer to Figure 2 , 57. The cartridge receiving half 14 defines an elongated channel member 22, which defines a U-shaped channel 24 having a distal portion 24a configured to releasably receive a SULU 18 and a proximal portion 24b configured to releasably receive a firing assembly 20 therein. Typically, when the SULU 18 is supported in the cartridge receiving half 14, the anvil 12a and the SULU 18 can be clamped together around the tissue, such that the firing assembly 20 can be actuated to fire a suture from the SULU 18 and abut against the anvil 12a to secure the suture to the tissue. The elongated channel member 22 has a base 25 and upright walls 26 extending from the base 25 on its opposite sides to support the locking assembly 100 within the elongated channel member 22. The upright wall 26 defines a through-hole 26a, which allows the locking member 110 to be pivotally connected to the upright wall 26, so that the locking member 110 can be pivoted around the pivot axis "P" ( Figure 5 Pivoting. The pivot axis “P” is transverse to the longitudinal axis “L” (see...) Figure 1 The upright wall 26 allows the locking member 110 to selectively pivot between a first position (e.g., locked position) engaging with the push plate 20b of the firing assembly 20 to prevent the push plate 20b from advancing through the locking member 110, and a second position (e.g., unlocked position) disengaging from the push plate 20b, so that the push plate 20b can advance through the locking member 110. The elongated channel member 22 also includes a guide bump 28 that extends upward from the base 25 at a predetermined distance “D” above the base plane “BP” of the base 25 when the locking member 110 is in the unlocked position and the guide push plate 20b slides along the guide bump 28. Figure 9 The guide plate 20b is located above the base 25. Each upright wall 26 also includes a stop 26b. Figure 8 When the locking member 110 is in the locked position, the stop member 26b protrudes inward and selectively engages with the locking member 110.
[0027] refer to Figure 3-12The locking member 110 of the locking assembly 100 is coupled to the spring 120 such that the locking member 110 prevents the surgical stapler 10 from firing when the SULU 18 is not loaded into the elongated channel member 22 of the staple cartridge receiving half 14. The locking member 110 includes a shoulder 110a that secures the spring 120 to the locking member 110 and retains the locking member 110 pivotally connected to the support hole 26a of the elongated channel member 22. The locking member 110 also includes a proximal tooth 110c that can be selectively received within a locking groove 20f of the push plate 20b of the firing assembly 20 by the elastic force from the spring 120, so as to inhibit movement of the push plate 20b relative to the distal end of the locking member 110 when the locking member 110 is in its locked position. The locking member 110 defines a push plate channel 110b (e.g., centrally located) therethrough for receiving the push plate 20b via the locking member 110 when the locking assembly 100 is in its unlocked position. The locking member 110 also includes arms 110d extending from opposite side surfaces of the locking member 110 for selective engagement with a stop 26b of the upright wall 26 when the locking assembly 100 is in its locked position (see [link to relevant documentation]). Figure 9 The locking member 110 also includes a distal toe 110e that is connected to the distal portion of the arm 110d at the distal end of the locking member 110.
[0028] Turn now Figure 9-12 When the SULU 18 is not accommodated within the elongated channel member 22 of the staple cartridge receiving half 14, the spring 120 of the locking assembly 100 pushes the locking member 110 into the locked position. Figure 9 This arrangement allows the proximal teeth 110c of the locking member 110 to be received within the locking groove 20f of the push plate 20b, and the arm 110d of the locking member 110 to engage with the stop 26b of the elongated channel member 22. In the locked position, the proximal teeth 110c, within the locking groove 20f, impede translation of the push plate 20b relative to the locking member 110 (e.g., horizontal constraint). The push plate 20b is also vertically constrained between the guide protrusion 28 of the elongated channel member 22 and the proximal teeth 110c of the locking member 110 in the locked position.
[0029] like Figure 11As seen, when SULU 18 is housed within the elongated channel member 22 of the staple cartridge receiving half 14, the proximal portion of SULU 18 engages the distal toe 110e of locking member 110 and drives the distal toe 110e downward, as indicated by arrow "A," causing locking member 110 to pivot about shoulder 110a, i.e., pivot axis "P," causing the proximal tooth 110c of locking member 110 to pivot out of groove 20f (e.g., counterclockwise), as indicated by arrow "B," into the unlocked position. In the unlocked position, the proximal finger 19a of the slide assembly 19 of SULU 18 engages with the distal finger 20c of push plate 20b via finger groove 20d of push plate 20b. And in the unlocked position, firing assembly 20 can advance distally, as indicated by arrow "C," allowing push plate 20b to translate through push plate channel 110b of locking member 110 (…). Figure 7 The slide assembly 19 of SULU 18 is advanced distally through SULU 18 to fire suture staples from SULU 18 and cuts tissue with the blade 19b of slide assembly 19 as slide assembly 19 is translated distally.
[0030] To remove SULU 18, the firing assembly 20 is pulled proximally to its initial or proximal position, where the proximal teeth 110c of the locking member 110 are aligned with the locking groove 20f. SULU 18 can then be removed. When SULU 18 is removed, the spring 120 of the locking assembly 100 causes the locking member 110 to pivot clockwise about the pivot axis “P,” thereby accommodating the proximal teeth 110c within the locking groove 20f of the push plate 20b, thus locking the firing assembly 20 in the locked position.
[0031] Those skilled in the art will understand that the structures and methods specifically described herein and illustrated in the accompanying drawings are non-limiting exemplary embodiments, and that the descriptions, disclosures, and figures should be interpreted only as examples of specific aspects. Therefore, it should be understood that this disclosure is not limited to the precise aspects described, and that various other changes or modifications can be made by those skilled in the art without departing from the scope or spirit of this disclosure. Furthermore, it is contemplated that elements and features shown or described in conjunction with one exemplary aspect can be combined with elements and features of another exemplary aspect without departing from the scope of this disclosure, and such modifications and variations are also intended to be included within the scope of this disclosure. In fact, any combination of any elements and features disclosed is within the scope of this disclosure. Therefore, the subject matter of this disclosure is not limited to what has been specifically shown and described.
Claims
1. A surgical fastener application device, comprising: Half of the anvil; A staple cartridge receiving half is defined in an elongated channel member, the elongated channel member being configured to receive a single-use loading unit (SULU). Including the firing assembly of the push plate; A locking assembly supported within the elongated channel member and including a locking member capable of engaging the push plate to prevent movement of the push plate relative to the locking member when the single-use loading unit is not supported within the elongated channel member, wherein the locking member includes an arm engaging a stop extending from the elongated channel member, the stop being configured to restrict clockwise pivoting rotation of the locking member.
2. The surgical fastener application device according to claim 1, wherein, The locking element is pivotally connected to the wall of the elongated channel member.
3. The surgical fastener application device according to claim 2, wherein, The locking element is movable between a locked position and an unlocked position, wherein in the locked position, the locking element prevents the push plate from translating distally through the locking element.
4. The surgical fastener application device according to claim 3, wherein, The locking element defines a push plate channel passing through it, the push plate channel being configured to align with the push plate.
5. The surgical fastener application device according to claim 4, wherein, The push plate defines a locking groove, and the locking member includes proximal teeth that can be received within the locking groove.
6. The surgical fastener application device according to claim 5, wherein, When the proximal tooth is received within the locking groove, the proximal tooth prevents the push plate from advancing through the push plate channel.
7. The surgical fastener application device according to claim 3, wherein, The locking assembly includes a spring that pushes the locking member into the locking position when the single-use loading unit is not located in the elongated channel member.
8. The surgical fastener application device according to claim 1, wherein, The locking assembly prevents the push plate from translating to the distal side.
9. The surgical fastener application device according to claim 8, wherein, The locking assembly vertically constrains the push plate.
10. A surgical fastener application device, comprising: Half of the anvil; A staple cartridge receiving half is defined in an elongated channel member, the elongated channel member being configured to receive a single-use loading unit (SULU). Push plate; A locking member capable of engaging a push plate, wherein when the locking member engages the push plate, the push plate is vertically and horizontally restricted to prevent the surgical fastener application device from being triggered when the single-use loading unit is not supported in the elongated channel member, wherein the locking member includes an arm that engages a stop extending from the elongated channel member, the stop being configured to restrict the clockwise pivoting rotation of the locking member.
11. The surgical fastener application device according to claim 10, wherein, The locking element is pivotally connected to the wall of the elongated channel member.
12. The surgical fastener application device according to claim 11, wherein, The locking element is movable between a locked position and an unlocked position, wherein, in the locked position, the locking element prevents the push plate from translating distally through the locking element.
13. The surgical fastener application device according to claim 12, wherein, The locking element defines a push plate channel passing through it, the push plate channel being configured to align with the push plate.
14. The surgical fastener application device according to claim 13, wherein, The push plate defines a locking groove and the locking member includes proximal teeth that can be received within the locking groove.
15. The surgical fastener application device according to claim 14, wherein, When the proximal tooth is received within the locking groove, the proximal tooth prevents the push plate from advancing through the push plate channel.
16. The surgical fastener application device according to claim 12, wherein, The locking element includes a spring that pushes the locking element into the locking position when the single-use loading unit is not located in the elongated channel member.
17. A surgical fastener application device, comprising: Half of the anvil; A staple cartridge receiving half is defined in an elongated channel member, the elongated channel member being configured to receive a single-use loading unit (SULU). Including the firing assembly of the push plate; A locking assembly supported within the elongated channel member and including a locking member movable between a first position and a second position to block the push plate of the firing assembly when the single-use loading unit is not supported within the elongated channel member, wherein the locking member includes an arm that engages a stop extending from the elongated channel member, the stop being configured to restrict clockwise pivoting of the locking member.
18. The surgical fastener application device according to claim 17, wherein, In the first position, the teeth of the locking member are received within the locking groove of the push plate to restrict the horizontal and vertical movement of the push plate, and wherein, in the second position, the push plate is configured to be advanced distally through a push plate channel defined by the locking member.