EP4447820A1 - Medizinisches instrument - Google Patents
Medizinisches instrumentInfo
- Publication number
- EP4447820A1 EP4447820A1 EP22843684.6A EP22843684A EP4447820A1 EP 4447820 A1 EP4447820 A1 EP 4447820A1 EP 22843684 A EP22843684 A EP 22843684A EP 4447820 A1 EP4447820 A1 EP 4447820A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- latching
- medical instrument
- instrument according
- connection
- fastening mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- 238000010276 construction Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 210000002105 tongue Anatomy 0.000 description 35
- 239000000969 carrier Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001839 endoscopy Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B17/2909—Handles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/00234—Surgical instruments, devices or methods for minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/03—Automatic limiting or abutting means, e.g. for safety
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/08—Accessories or related features not otherwise provided for
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B2017/0046—Surgical instruments, devices or methods with a releasable handle; with handle and operating part separable
- A61B2017/00473—Distal part, e.g. tip or head
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B2017/00477—Coupling
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B2017/00831—Material properties
- A61B2017/00862—Material properties elastic or resilient
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B2017/2901—Details of shaft
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B17/2909—Handles
- A61B2017/2912—Handles transmission of forces to actuating rod or piston
- A61B2017/2919—Handles transmission of forces to actuating rod or piston details of linkages or pivot points
- A61B2017/292—Handles transmission of forces to actuating rod or piston details of linkages or pivot points connection of actuating rod to handle, e.g. ball end in recess
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B2017/2926—Details of heads or jaws
- A61B2017/2931—Details of heads or jaws with releasable head
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/03—Automatic limiting or abutting means, e.g. for safety
- A61B2090/033—Abutting means, stops, e.g. abutting on tissue or skin
- A61B2090/034—Abutting means, stops, e.g. abutting on tissue or skin abutting on parts of the device itself
- A61B2090/035—Abutting means, stops, e.g. abutting on tissue or skin abutting on parts of the device itself preventing further rotation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/08—Accessories or related features not otherwise provided for
- A61B2090/0807—Indication means
- A61B2090/0808—Indication means for indicating correct assembly of components, e.g. of the surgical apparatus
Definitions
- the invention relates to a medical instrument with a hollow shaft, at the distal end of which a tool carrier can be fixed by means of a first fastening mechanism and whose proximal end can be fixed to an operating unit by means of a second fastening mechanism.
- the hollow shaft which is usually designed as a cylindrical shaft tube, with a fastening mechanism on the distal and proximal sides in order to be able to connect various tool carriers and/or operating units to the shaft .
- the instrument systems known from practice that can be dismantled in several parts are designed in such a way that at least the fastening mechanism for connecting the tool carrier to the distal end of the shaft is designed as a bayonet coupling.
- a special anti-twist device is required to prevent the bayonet coupling from loosening again due to counter-rotation of the connected components.
- the invention is based on the task of creating a medical instrument whose fastening mechanism for the detachable Shaft connections are easy to handle in production and assembly while ensuring a secure hold.
- the solution to this problem is characterized according to the invention in that at least the first attachment mechanism for connecting the tool carrier to the distal end of the shaft is designed as a mechanical latching connection with at least one spring-elastic element.
- Mechanical snap-in connections are distinguished by the fact that on the one hand they are simple to set up and handle, and on the other hand they ensure a secure connection of the components coupled to one another in this way.
- the spring-elastic element of the latching connection ensures both easy execution of the latching and simple release of the latching, which generally requires no tools.
- a preferred embodiment of the invention proposes that not only the first fastening mechanism for connecting the tool carrier to the distal end of the shaft, but also the second fastening mechanism for connecting the proximal end of the shaft to the operating unit should be designed as a mechanical latching connection with at least one spring-elastic element is.
- the design of the fastening mechanisms on both sides at the distal and proximal end of the shaft allows the medical instrument equipped in this way to be extremely flexible while being simple to manufacture.
- the mechanical latching connection consists of at least one latching hook formed on one of the components to be connected to one another and at least one corresponding latching receptacle for the at least one latching hook formed on the other component, with the at least one Latching hook is preferably arranged at the free end of an elastic spring tongue.
- the arrangement of the locking hook on an elastic spring tongue ensures that the locking mechanism can be actuated easily, since the spring tongue that has been cut free can be deflected without great effort.
- the at least one snap-in receptacle for receiving the snap-in hook is advantageously designed as an undercut.
- the undercut to be gripped from behind by a latching hook represents a latching receptacle that is particularly easy to produce in terms of production technology, but which at the same time ensures a secure and positionally stable latching with the latching hook.
- a plurality of latching hooks and latching receptacles be distributed over the circumference of the components to be connected to one another.
- the latching is released by applying a radially acting compressive force to the latching connection, preferably without tools.
- the mechanical snap-in connection be designed as a plug-in connection that can be implemented in the longitudinal direction of the shaft.
- the purely axial plugging of the components to be connected together represents a particularly easy and quick-to-handle embodiment.
- the mechanical snap-in connection be designed as a rotary plug-in connection.
- a spring tongue cut free is formed on the component with the latching receptacle in the region of the latching, which tongue can be pressed radially inwards to release the latching connection.
- This spring tongue which has been cut free, allows the radial compressive force required for release to be exerted in a targeted manner on the locking mechanism in a simple manner. If the medical instrument according to the invention is designed as an HF instrument, the invention also proposes that the spring tongue that has been cut free can be covered with a tubular cover for insulation purposes.
- the spring tongue of the snap-in hook abuts a shoulder of the snap-in socket in a form-fitting manner, causing an anti-twist device.
- This anti-rotation device according to the invention is characterized in that no additional component is required, as is known from the prior art, since the spring tongue automatically rests in a form-fitting manner on the shoulder of the latching receptacle when it is transferred into the latching position.
- the latching of the first fastening mechanism between the tool carrier and the distal end of the shaft can be released by moving a tool of the tool carrier into an unlocking position.
- this unlocking position of the tool can be, for example, an over-open position that can only be set to release the latching.
- the invention finally proposes that guide pins be formed on the facing end faces of the components to be connected to one another so that the components can be placed in the correct position relative to one another.
- FIG. 1 shows a perspective view of a medical instrument according to the invention
- FIG. 2 shows a detail perspective view of the distal end of a first embodiment of a medical instrument according to the invention with a tool carrier fixed to the shaft
- 3 shows a view according to FIG. 2, but showing the tool carrier and the shank in the decoupled state
- FIG. 4 shows a schematic longitudinal section through the illustration according to FIG. 2,
- Fig. 5 is a sectional view of FIG. 4, but the latching in one
- FIG. 6 shows a longitudinal section rotated by 90° according to FIG. 4,
- FIG. 7 shows a sectional view according to FIG. 4, but showing the shaft with a tubular covering
- FIG. 8 shows a schematic longitudinal section through the tool carrier and the distal end of the shank, showing a second embodiment according to the invention
- FIG. 9 shows a sectional view according to FIG. 8, but showing a third embodiment according to the invention.
- FIG. 10 is a sectional view corresponding to FIG. 8, but showing a fourth embodiment of the invention.
- FIG. 1 shows the distal part of a medical instrument 1 with a hollow shaft 2, at the distal end 3 of which a tool carrier 4 can be fixed by means of a first fastening mechanism 5.
- the proximal end 6 of the shaft 2 can be fixed to an operating unit 8 by means of a second fastening mechanism 7.
- the operating unit 8 can be a manually operated handle, as shown in FIG used in robot-assisted endoscopy.
- the hollow shaft 2 which is designed as a cylindrical shaft tube, is at its distal end End 3 and at its proximal end 6 are each provided with a fastening mechanism 5 and 7, respectively, in order to be able to connect various tool carriers 4 and/or operating units 8 to the shaft 2.
- Fig. 2 shows the distal end of the medical instrument 1 with a tool carrier 4 fixed to the distal end 3 of the shaft 2.
- FIG. 3 shows the medical instrument 1 shown in FIG. 2 in a decoupled state, in which the tool carrier 4 is separated from the distal end 3 of the shaft 2 .
- the first fastening mechanism 5 for connecting the tool carrier 4 to the distal end 3 of the shaft 2 is designed as a mechanical latching connection.
- the second attachment mechanism 7 for connecting the proximal end 6 of the shank can also be used 2 can be designed with the operating unit 8 as an identical mechanical locking connection.
- a synopsis of Figures 2 to 6 shows the structure of the first fastening mechanism 5 embodied as a mechanical snap-in connection.
- the mechanical latching connection consists of at least one latching hook 9 formed on the tool carrier 4 and at least one corresponding latching receptacle 10 formed on the shaft 2 for the at least one latching hook 9.
- the at least one latching hook 9 is arranged at the free end of an elastic spring tongue 11 and the at least one latching receptacle 10 for the latching hook 9 is designed as an undercut 12 .
- Mechanical snap-in connections are distinguished by the fact that on the one hand they are easy to set up and handle and on the other hand they have a secure ensure re connection of the components coupled to one another in this way.
- the elastic spring tongue 11 of the latching connection ensures both easy execution of the latching and simple release of the latching, which generally requires no tools.
- a shoulder 13 which projects radially inwards and reduces the diameter of the shaft 2 is formed on the inside of the shaft 2 at the distal end 3 of the shaft 2, as can be seen in Figures 4-6 is.
- the proximal end of this paragraph 13 forms the undercut 12 for the attachment of the locking hook 9.
- two elastic spring tongues 11 provided with latching hooks 9 and two corresponding latching receptacles 10 designed as undercuts 12 are provided for the latching hooks 9, with the latching hooks 9 and latching receptacles 10 each rotating by 180 ° offset from each other over the circumference of the tool carrier 4 and the shaft 2 are arranged.
- the tool carrier 4 is coupled to the distal end 3 of the shank 2 starting from the separate position of the two components shown in FIG.
- guide pins 15 are formed on the facing end sides of the components to be connected to one another for the precise positioning of the components relative to one another, as can be seen in particular in Figure 6.
- a guide groove 16 for the spring tongues 11 of the latching hooks 9 is formed in paragraph 13, so that the spring tongues 11 in the latched state positively abut the paragraph 13 of the latching receptacles 10, causing an anti-twist device.
- the detent between the detent hooks 9 and the undercuts 12 is preferably released without tools by applying a radially acting pressure force D to the detent connection.
- a cut spring tongue 17 is formed in the shaft 2 in the area of each latch, which can be pressed radially inwards to release the latching connections by applying the radially acting compressive force D, as can be seen in Fig 5 can be found.
- the spring tongues 17 When the spring tongues 17 are pressed down, the spring tongues 17 strike the latching hooks 9 that engage behind the undercuts 12. Due to the mounting of the latching hooks 9 at the end of the elastic spring tongues 11, the latching hooks 9 together with the spring tongues 11 are also pressed radially inwards when a radial compressive force D is applied the spring tongues 17 cut free in the shaft 2 is exercised.
- the locking hooks 9 By pressing the locking hooks 9 radially inwards in relation to the shank 2, the locking hooks 9 disengage from the undercuts 12 and thus release the first fastening mechanism 5 again, so that the tool carrier 4 and the shank 2 can be pulled apart again in opposite directions to separate the two components.
- the shank 2 As an alternative to forming the spring tongue 17 cut free in the shank 2 to release the latching, it is also possible to design the shank 2 to be elastically deformable in the region of the latching, so that when the radial compressive force D is applied, the shank 2 can be pressed in radially inwards. in order to release the snap-in connection by running against the snap-in hooks 9.
- the mechanical latching connection as a rotary plug-in connection, with the two components latching together as described above, but when the two components are fitted into one another, the two components are rotated relative to one another in addition to the axial movement.
- the previously described embodiment can also be used in the formation of the medical instrument 1 as an HF instrument if the spring tongue 17 which has been cut free is covered with a tubular covering 18 for insulation purposes.
- the second embodiment shown in Fig. 8 for forming the mechanical locking connection differs from the embodiment shown in Figs User of the medical instrument 1 has direct access to the latching hooks 9 in order to adjust them by applying a radial compressive force D to press inside the shaft 2 until they are disengaged from the undercuts 12.
- a tongue 20 running in the direction of the longitudinal axis 14 of the shank 2 is formed on the latching hook 9 and makes it easier to press in the latching hook 9 .
- the latching is not released by applying the radial compressive force D to the latching in the area of the latching hooks 9, but to the distal end of the elastic spring tongues 11 that is remote from the latching hooks, for which the material of the tool carrier 4 is designed to be elastically deformable in the area where the spring tongues 11 are mounted.
- the spring tongues 11 together with the end latching hooks 9 are bent radially inward, so that the latching hooks 9 disengage from the undercuts 12 and the two components can be separated again by pulling them apart.
- the fourth embodiment shown in FIG. 10 for forming the mechanical latching connection shows that the arrangement of latching hook 9 and latching receptacle 10 on the components to be coupled with one another can also be interchanged.
- FIG. 10 shows an embodiment in which the end-side Spring tongues 11 provided with locking hooks 9 are formed on the shaft 2 and the locking receptacles 10 on the tool carrier 4 .
- the undercuts 12 forming the latching receptacles 10 are formed by a recess 21 in the tool carrier 4, in which the latching hooks 9 engage in the latched position, as can be seen in FIG.
- the latching can be released in that the radial compressive force D is exerted either directly on the latching hooks 9 mounted in the recesses 21 of the tool carrier 4, or but on the end of the elastic spring tongues 11 that is farther away from the locking hook, for which purpose the material of the distal end 3 of the shaft 2 in the region of the bearing of the spring tongue 1 is designed to be elastically deformable.
- the arrangement of the latching hooks 9 and latching receptacles 10 shown in FIG. 10 can also be applied to all of the embodiments of the mechanical latching connections previously shown in FIGS. 2 to 9.
- the mechanical snap-in connections designed as described above are distinguished by the fact that these shaft connections are easy to handle during production and assembly and thereby ensure that the components coupled to one another are held securely.
Landscapes
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Ophthalmology & Optometry (AREA)
- Surgical Instruments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021134277.5A DE102021134277A1 (de) | 2021-12-22 | 2021-12-22 | Medizinisches Instrument |
| PCT/EP2022/087254 WO2023118308A1 (de) | 2021-12-22 | 2022-12-21 | Medizinisches instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4447820A1 true EP4447820A1 (de) | 2024-10-23 |
Family
ID=84980903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22843684.6A Pending EP4447820A1 (de) | 2021-12-22 | 2022-12-21 | Medizinisches instrument |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250057558A1 (de) |
| EP (1) | EP4447820A1 (de) |
| CN (1) | CN118510453A (de) |
| DE (1) | DE102021134277A1 (de) |
| WO (1) | WO2023118308A1 (de) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19504002A1 (de) | 1995-02-08 | 1996-08-14 | Arnold Dipl Ing Dr Med Pier | Chirurgischer Klammerapplikator |
| US6106539A (en) | 1998-04-15 | 2000-08-22 | Neosurg Technologies | Trocar with removable, replaceable tip |
| EP1400211B1 (de) * | 2002-09-14 | 2005-06-08 | Karl Storz GmbH & Co. KG | Endoskopisches Instrument mit abnehmbarem Werkzeugkopf |
| ATE545374T1 (de) | 2006-06-30 | 2012-03-15 | Bovie Medical Corp | Chirurgisches instrument mit abnehmbarer werkzeuganordnung |
| US20120259325A1 (en) * | 2009-10-09 | 2012-10-11 | Houser Kevin L | Laparoscopic Instrument with Attachable Energy End Effector |
| US9510895B2 (en) * | 2010-11-05 | 2016-12-06 | Ethicon Endo-Surgery, Llc | Surgical instrument with modular shaft and end effector |
| US9113899B2 (en) * | 2011-11-29 | 2015-08-25 | Covidien Lp | Coupling mechanisms for surgical instruments |
| CN105120786B (zh) | 2013-02-07 | 2018-06-15 | 泰利福医疗公司 | 末端执行器连接及致动系统 |
| US10058343B2 (en) * | 2013-03-14 | 2018-08-28 | Covidien Lp | Systems for performing endoscopic procedures |
| US11006954B2 (en) | 2017-02-17 | 2021-05-18 | Ethicon Llc | Suction attachment of an adjunct to a surgical instrument |
-
2021
- 2021-12-22 DE DE102021134277.5A patent/DE102021134277A1/de active Pending
-
2022
- 2022-12-21 US US18/722,687 patent/US20250057558A1/en active Pending
- 2022-12-21 EP EP22843684.6A patent/EP4447820A1/de active Pending
- 2022-12-21 WO PCT/EP2022/087254 patent/WO2023118308A1/de not_active Ceased
- 2022-12-21 CN CN202280084533.5A patent/CN118510453A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021134277A1 (de) | 2023-06-22 |
| US20250057558A1 (en) | 2025-02-20 |
| WO2023118308A1 (de) | 2023-06-29 |
| CN118510453A (zh) | 2024-08-16 |
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