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JP-7855383-B2 - Surgical instrument blade cartridges

JP7855383B2JP 7855383 B2JP7855383 B2JP 7855383B2JP-7855383-B2

Inventors

  • フェリックス・ボブ

Assignees

  • エルベ エレクトロメディジン ゲーエムベーハー

Dates

Publication Date
20260508
Application Date
20220329
Priority Date
20210419

Claims (15)

  1. A cartridge housing (24) that can be connected to the device (12), The blade housing (31) is movably supported inside the cartridge housing (24), The blade (22) is movably supported inside the blade housing (31), A first operating element (34) for moving the blade housing (31), A knife cartridge (23) for a surgical instrument (12) comprising a second operating element (45) for moving the blade (22) inside the blade housing (31) out of the blade housing (31) .
  2. The knife cartridge according to claim 1, wherein the cartridge housing (24) includes a locking means (27) for releasably connecting the cartridge housing (24) to the device (12).
  3. The knife cartridge according to claim 2, wherein the locking means (27) is operable by the first operating element (34).
  4. The knife cartridge according to any one of claims 1 to 3, wherein the blade housing (31) has a first locking position in which the blade housing (31) is completely located inside the cartridge housing (24).
  5. The knife cartridge according to any one of claims 1 to 4, wherein the blade housing (31) has a second locking position in which the blade housing is held partially protruding from the cartridge housing (24).
  6. The knife cartridge according to any one of claims 1 to 5, wherein the blade (22) has a retracted position in which the blade (22) is completely located inside the blade housing (31) and is locked inside the blade housing (31).
  7. The knife cartridge according to any one of claims 1 to 6, wherein the blade (22) includes an extension (22a) that can extend from the blade housing (31).
  8. The knife cartridge according to any one of claims 1 to 7, wherein the first operating element (34) is movably supported by the cartridge housing (24).
  9. The knife cartridge according to any one of claims 1 to 8, wherein the first operating element (34) is supported by the cartridge housing (24) along a predetermined movement path.
  10. The knife cartridge according to claim 9, wherein a pivot lock (41) is effective between the first operating element (34) and the cartridge housing ( 24 ), enabling the pivot movement of the first operating element (34) only at the end position of the movement path.
  11. The knife cartridge according to any one of claims 1 to 10, wherein the first operating element (34) includes a coupling portion (39) that connects to the blade housing (31).
  12. The knife cartridge according to any one of claims 1 to 11, wherein the first operating element (34) and the second operating element (45) can be alternately coupled to the blade (22) by a switching mechanism (50).
  13. The knife cartridge according to any one of claims 1 to 12, wherein the second operating element (45) can be operably coupled to the blade (22) by the pivoting motion of the first operating element (34).
  14. The knife cartridge according to any one of claims 1 to 13, wherein an operation lock (54, 55) is effective between the first operation element (34) and the second operation element (45).
  15. The knife cartridge according to any one of claims 1 to 14, wherein an insertion feeler (58) that locks the operation of the first operating element (34) outside the instrument (12) is assigned to the first operating element (34).

Description

This invention relates to a knife cartridge for surgical instruments. Surgical instruments, particularly those used in open surgery, often consist of forceps or scissors. For example, Patent Document 1 discloses such an instrument for fusing and cutting blood vessels. Coagulation electrodes are provided on the two jaws of this forceps-like instrument, which are movable relative to each other. Furthermore, the instrument is provided with a holder for a knife cartridge containing a blade for cutting the fused blood vessels. The knife cartridge can be replaced to re-equip the instrument with a sharp blade when the blade becomes dull. Additionally, disposable knives can be used with sterilizable or reusable instruments. Sterilizable instruments are equipped with knife channels to guide the replaceable cartridge knife blades. These knife channels can become contaminated during instrument use and are difficult to clean. However, the risk to patients from infectious materials remaining on the instruments must be eliminated. U.S. Patent Application Publication No. 2011/0004208 Figure 1 is a side view of a basic diagram of a device having a knife cartridge according to the present invention.Figure 2 is a side view of the dashed diagram of the knife cartridge in the handheld state shown in Figure 1.Figure 3 shows the knife cartridge according to Figure 2, with the blade housing in the operating position and the blade extendable (the dashed line indicates the extended state).Figure 4 is a cross-sectional view of the knife cartridge shown in Figure 3, along line IV-IV.Figure 5 is a highly enlarged schematic perspective view of a portion of the apparatus shown in Figure 1, without the knife cartridge.Figure 6 is a very shortened cross-sectional perspective view of the knife cartridge shown in Figure 3.Figure 7 is a diagram illustrating the kinematic principle of the knife cartridge in different positions and states as shown in Figures 2 and 3.Figure 8 is a diagram illustrating the kinematic principle of the knife cartridge in different positions and states as shown in Figures 2 and 3.Figure 9 is a diagram illustrating the kinematic principle of the knife cartridge in different positions and states as shown in Figures 2 and 3.Figure 10 is a diagram illustrating the kinematic principle of the knife cartridge in different positions and states as shown in Figures 2 and 3.Figure 11 is a diagram illustrating the kinematic principle of the knife cartridge in different positions and states, as shown in Figures 2 and 3. Figure 1 shows a surgical instrument 12 having two legs 13, 14 pivotally connected to each other by a joint 15 in the type of forceps or scissors. The legs 13, 14 include gripping portions 16, 17 at their proximal ends. The distal ends of the legs 13, 14 are jaws 18, 19 that can hold and compress biological tissue between them. For example, the tissue may be blood vessels, other hollow tubes, or even tendons, skin, muscle, etc. The jaws 18, 19 can be constructed in a smooth or slightly profiled manner. Furthermore, the jaws 18, 19 can be made from conductive or non-conductive materials. The opposing surfaces 20, 21 of the jaws 18, 19 can be configured as electrodes, for example, to apply an electric current to the tissue held between the jaws 18, 19 and to coagulate and/or fuse the tissue, if they are configured to be conductive. Therefore, the opposing surfaces 20 and 21 form electrodes that can be supplied with current via cables (not shown) or voltage sources provided in the device. Furthermore, additional elements such as switches may be provided to control the current, particularly to switch it on and off. The instrument 12 is preferably a coagulation and cutting instrument that uses a blade for cutting tissue (Figures 3, 4, and 6). The blade 22 is part of a knife cartridge 23 that is releasably held in the instrument 12. For example, the leg 14 includes a base configured as a compartment into which, for this purpose, for example, a knife cartridge 23 can be inserted. The knife cartridge 23 is preferably configured for single use, while the instrument 12 is configured as a sterilizable instrument 12 that can be reused multiple times. The knife cartridge 23 is separated from the instrument and discarded after use, while the instrument 12 is cleaned and sterilized. The knife cartridge 23 includes a cartridge housing 24, which can be configured, for example, as a plastic injection-molded section. The cartridge housing 24 is provided with a coupling structure 25 at its distal end during use, which fits into the complementary structures of the legs 14. For example, the coupling structure can be a bead-shaped projection that fits into the molded transverse grooves 26 of the instrument 12. At the opposite proximal end, the cartridge housing 24 may include a locking means 27, and a locking member 28 may be part of the locking means 27, which is, for example, located inside the cartridge housing 24 and pivotably supp