EP4114279A1 - Instrumentenhalbzeug und medizinisches instrument - Google Patents
Instrumentenhalbzeug und medizinisches instrumentInfo
- Publication number
- EP4114279A1 EP4114279A1 EP21709968.8A EP21709968A EP4114279A1 EP 4114279 A1 EP4114279 A1 EP 4114279A1 EP 21709968 A EP21709968 A EP 21709968A EP 4114279 A1 EP4114279 A1 EP 4114279A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- instrument
- hard metal
- body part
- instrument body
- solder
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/04—Surgical instruments, devices or methods for suturing wounds; Holders or packages for needles or suture materials
- A61B17/06—Needles ; Sutures; Needle-suture combinations; Holders or packages for needles or suture materials
- A61B17/062—Needle manipulators
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/28—Surgical forceps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B2017/00526—Methods of manufacturing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B2017/00831—Material properties
- A61B2017/00836—Material properties corrosion-resistant
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B2017/00831—Material properties
- A61B2017/00858—Material properties high friction or non-slip
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/28—Surgical forceps
- A61B17/2812—Surgical forceps with a single pivotal connection
- A61B17/282—Jaws
- A61B2017/2825—Inserts of different material in jaws
-
- 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
- A61B2090/0813—Accessories designed for easy sterilising, i.e. re-usable
Definitions
- the present invention relates to a semi-finished instrument product comprising an instrument body part blank for forming an instrument body part of a medical instrument, which instrument body part blank is formed from a metal, in particular an instrument steel, has a distal end region and at the distal end region a recess for receiving a hard metal element, the recess having a Has contact surface for the hard metal element.
- the invention also relates to a medical instrument comprising at least one instrument body part.
- Semi-finished instruments and medical instruments of the type described above are known in various embodiments. For example, who they used as a needle holder to hold surgical needles, to hal and lead.
- Needle holders usually comprise two instrument body parts in the form of branches which are pivotably mounted on one another and which are designed in the form of jaw parts at their distal end. These form clamping jaws between which a needle can be clamped.
- the surfaces of the clamping jaws are usually structured.
- hard metal jaws for needle holders which are designed in the form of hard metal plates and are connected to the jaw parts in such a way that they have at least one part form a surface of the facing side surfaces of the clamping jaws.
- the hard metal plates which form hard metal inserts can be connected to the instrument body parts which are made from a metal, for example by soldering, in particular hard soldering.
- Another problem is that, due to the diffusion of solder both into the material from which the instrument body part blank is formed and into the hard metal insert, the amount of solder present in the solder gap between the hard metal insert and the instrument body part blank is insufficient.
- One consequence of this are voids, voids and pore formations.
- both the excess solder and any excess of the hard metal inserts must then be laboriously reworked using a manual grinding process.
- there is the risk of overheating the material from which the instrument body part blank is formed which increases the susceptibility of the medical instrument to corrosion.
- the intended excess solder can lead to further problems.
- chromium is bound by solder, as it has a high affinity for the commonly used solder additives. As a result, chromium can be depleted in the diffusion zone of the material from which the instrument body part blank is formed. In particular, this effect can occur with stainless martensitic steel such as the material 1.4021.
- the known process for connecting the hard metal inserts to the instrument body part blanks that is to say the entire soldering process, is very labor-intensive and therefore expensive. This is not least because it includes many, sometimes manual, work steps and therefore only has a low level of process stability.
- instrument body part tube Ling comprises a solder chamber for receiving solder and that the Lotkam mer is fluidly connected to the recess.
- the solution proposed according to the invention makes it possible, in particular, to precisely specify an amount of solder. This is achieved in particular by specifying the shape and size of the soldering chamber. If the solder chamber is completely filled with solder, the amount of solder is precisely specified. Due to the fluid-effective connection of the soldering chamber with the recess that receives the hard metal element, the solder can be drawn out of the soldering chamber by capillary action into the soldering gap between the hard metal element and the contact surface during hardening. If there is no longer any capillary effect, the solder can no longer flow. In this way, the problems described above, which arise due to a large excess of solder used to date and due to an uncontrolled flow of solder, can be prevented.
- the solder can be precisely dosed by specifying the solder chamber, namely its volume, it is possible to dispense with both coating the instrument body part blank with solder stop and the usual generous protrusion of the hard metal inserts over the instrument body part blank. As a result, the effort subsequently required for processing the semifinished instrument, in particular by grinding, is significantly reduced.
- the provision of the soldering chamber, which can be arranged or formed on the instrument body part blank in particular, in such a way that it can be removed from the recess of the instrument body part blank after the hard metal insert has been soldered has the advantage that the hard metal insert is already in its final or substantially final shape can be soldered to the instrument body part raw ling.
- the hard metal insert can be designed in the form of a hard metal plate, which is already structured in the desired manner, i.e. has a structured or profiled surface that is optimal for holding a needle, and otherwise already defines a desired shape, for example with side bevels .
- further processing effort for the formation of the semifinished instrument can be minimized as far as possible.
- the described further Education is particularly advantageous if hard metal platelets forming hard metal inserts are connected to the instrument body parts, which are made of a metal, by means of a vacuum high-temperature soldering process. Large temperature differences during the hardening process, which is carried out at around 1000 ° C, and different thermal expansion coefficients of the instrument body part and the hard metal insert then no longer lead to undesirable formation of defects, cracks or brittle phases with insufficient mechanical strength.
- the semifinished instrument product advantageously comprises a hard metal element.
- the hard metal element can, for example, have the shape of a plate and have a structured or profiled surface.
- the hard metal element can already have its final shape, so that it does not have to be further processed after being connected to the instrument body part blank, in particular not by grinding.
- the hard metal element is designed in the form of a plate.
- Such a device can be handled easily and securely connected to the instrument body part blank in the manner described by soldering.
- the hard metal element preferably has a soldering surface for contact with the contact surface.
- a solder gap forms between the soldering surface and the contact surface into which the solder is drawn from the soldering chamber by capillary action.
- An optimal connection between the hard metal insert and the instrument body part blank can in particular be achieved in that a solder layer is formed between the contact surface and the soldering surface. This is preferably continuous and not interrupted, so that the contact surface and the soldering surface are completely separated from one another by the solder layer.
- a thickness of the solder layer can in particular be less than 0.05 mm.
- the hard metal element has a tool side surface and that the tool side surface and the soldering surface point in opposite directions.
- a flat hard metal plate can be formed, which forms the hard metal element.
- the tool side surface for example a profiled or structured surface of the hard metal element for gripping and holding a needle, can then already be provided in a desired shape before it is connected to the instrument body part blank.
- the tool side surface is designed to be planar or essentially planar or is structured.
- the tool side surface can be provided with a macroscopic structure.
- macroscopic means that depressions or projections on the tool side surface are larger than approximately 0.1 millimeters.
- the design of the semifinished instrument can be simplified in particular by the fact that the tool side surface has a regular structure.
- a needle can be held in a defined manner with an instrument, for example a Nadelhal ter.
- the structure has a plurality of projections and recesses formed between these. This makes it possible, in particular, to hold a needle securely between two clamping jaws of a medical instrument, for example.
- the projections can partially dig into the needle and the indentations partially accommodate the needle.
- a good holding effect can in particular be achieved in that the projections are pyramid-shaped.
- they can be designed in the form of a three- or four-sided pyramid.
- the hard metal element has at least one side edge extending transversely to the tool side surface and if a bevel is formed in the transition area of the tool side surface and the at least one side edge.
- the bevel can be formed at an angle in a range from about 35 ° to about 55 °.
- the instrument body part blank can be manufactured in a simple manner if the soldering chamber comprises a bore or is designed in the form of a bore. is formed. A volume of the solder chamber can thus be easily vorgege ben, namely by the length and diameter of the bore.
- the solder chamber defines a longitudinal axis of the solder chamber, that the recess defines a longitudinal axis of the recess and that the longitudinal axis of the solder chamber and the longitudinal axis of the recess run parallel or essentially parallel to one another.
- the soldering chamber can also be loaded with solder in a simple manner before the hard metal insert is soldered to the instrument body part blank. In particular, this becomes particularly simple if the soldering chamber is formed on a projection of the instrument body part blank which extends, for example, in the distal direction away from the recess for receiving the hard metal insert.
- the solder chamber has a cross connection that extends transversely, in particular perpendicular, to the longitudinal axis of the solder chamber, is fluidly connected to the recess.
- the semifinished instrument product can be designed in a simple manner if the cross connection is in the form of a cross bore.
- the cross connection penetrates the contact surface. The solder can then flow out of the solder chamber through the cross connection and directly into the solder gap.
- the handling of the instrument body part blank and the design of the semi-finished instrument are particularly further simplified by the fact that the soldering chamber is at a distal end of the instrument body part blank is arranged or formed.
- the solder chamber can thus be loaded with solder in a simple manner. Furthermore, with a corresponding design, it can be removed in a simple manner after the hard metal insert has been connected to the instrument body part blank.
- the instrument body part blank comprises a solder chamber section, that the solder chamber is arranged or formed on the solder chamber section and that the solder chamber section is designed to be separable from the instrument body part blank.
- the solder chamber section is therefore only temporarily part of the instrument body part blank. In particular, it can be partially removed after the hard metal insert has been soldered to the instrument body. This is done by separating the Lotttingab section from the remaining instrument body part blank.
- the Lotcroab section can thus initially be formed in one piece with the instrument body part blank and form part of the same, the task of which is in particular to receive solder in the solder chamber arranged or formed in the solder chamber section for soldering the hard metal insert and the instrument body part blank. After soldering, the soldering chamber is empty and is no longer required. It can then be cut off, for example, by sawing, grinding or milling. This is possible in a simple manner if a constriction or constriction, for example a predetermined breaking point, is formed between the soldering chamber section and the remaining instrument body part blank.
- the recess has a first end surface and a second end surface, if the first end surface extends transversely to the contact surface, if the second end surface extends transversely to the contact surface and if the first end surface and the second end surface towards each other or substantially to point to each other.
- a recess configured in this way makes it possible, in particular, to limit a movement of the hard metal element which is received in the recess before the soldered connection is formed, namely between the first end face and the second end face.
- the first end surface or the second end surface with the contact surface Define undercut.
- a distance between the hard metal element and the contact surface and thus a width of the solder gap can also be specified in a simple and reproducible manner.
- a contour of the first end face and a contour of the second end face differ from one another. This makes it possible in particular to design the recess in such a way that a clear position of the hard metal element in the recess is specified.
- the hard metal element can thus be positioned on the instrument body part blank in a defined manner. Depending on a remaining game, it can be ensured in particular that a preformed hard metal element can be used in the desired manner without it having to be extensively processed after being soldered to the instrument body part blank.
- first end face and / or the second end face are planar or substantially planar or are concavely curved towards one another.
- first end face and / or the second end face can be designed so as to be concavely curved with respect to an axis of curvature running transversely to the contact face.
- first end face and the second end face can be designed differently, so that the hard metal element can be received in the recess in a form-fitting manner or essentially in a form-fitting manner - apart from any play that may remain.
- Curvatures of the first end surface and the second end surface can differ in particular in order to be able to provide a defined positioning of the hard metal element in the recess.
- a coupling receptacle is formed on the instrument body part blank for receiving, in particular for positively locking receiving, a coupling projection protruding from the hard metal element, in particular corresponding to the coupling receptacle.
- the coupling receptacle therefore makes it possible, in particular in cooperation with the coupling projection on the hard metal element, to clearly position the hard metal element in the recess.
- a movement of the hard metal element relative to the instrument body part blank in a plane parallel to the contact surface or parallel to the soldering surface can be effectively prevented.
- an at least partially positive coupling between the instrument body part blank and the hard metal element can be achieved through the interaction of the coupling receptacle and the coupling projection.
- the coupling receptacle is arranged or formed on the solder chamber section. This makes it possible, in particular, to separate the coupling receptacle together with the soldering chamber section after the hard metal element has been soldered to the instrument body part blank.
- the hard metal element comprises a protruding coupling projection and if the coupling projection is designed to be separable from the hard metal element.
- This configuration makes it possible in particular to separate the coupling projection after soldering the hard metal element to the instrument body part blank, so that only the hard metal element, in particular with its tool side surface, remains on the instrument body part blank to form the semi-finished instrument.
- a thickness, in particular an average thickness, of the hard metal element in the area of the coupling projection is smaller than in the area of the tool side surface.
- the coupling receptacle has a coupling receiving abutment surface and that the coupling projection has a coupling projection soldering surface for contact with the coupling receiving abutment surface.
- This configuration makes it possible, in particular, to connect the hard metal element and the instrument body part blank to one another by soldering also in the area of the coupling receptacle and the coupling projection.
- a distance between the coupling receiving contact surface and the coupling projection soldering surface can also be selected so that no capillary effect occurs that draws solder between these two surfaces.
- the coupling receiving contact surface and the contact surface preferably define a common contact plane. Such a configuration enables the formation of an instrument body part blank in a simple manner.
- the cross connection penetrates the coupling receiving contact surface. If the solder chamber section is removed after the hard metal element has been connected to the instrument body part blank, this configuration also enables the cross connection to be removed. In particular, this can prevent cavities from remaining on the semi-finished instrument after the hard metal element and the instrument body part blank have been soldered, which can have a negative effect on the stability of the instrument.
- the instrument body part blank comprises a predetermined breaking point and if the predetermined breaking point is arranged or designed for separating the solder chamber, in particular the Lot screeningab section, from the instrument body part blank.
- a predetermined breaking point in particular, makes it easier to separate the solder chamber, in particular together with the solder chamber section, from the instrument body part blank. So that part of the instrument body part blank that is only required to use a lot of solder to connect the hard metal element and the In- To define instrument body part blank, can be easily and safely removed after soldering the hard metal element and the instrument body part blank.
- the predetermined breaking point can be formed in a simple manner if it is in the form of a weakened area between a distal end of the instrument body part and the solder chamber section.
- instrument body part blank is formed by cold or hot forming.
- Such instrument body part blanks can be formed in a simple and defined manner.
- the object set out at the beginning is also achieved according to the invention in a medical instrument of the type described at the outset in that the at least one instrument body part is formed from one of the advantageous semifinished instrument products described above.
- Such a medical instrument can be designed in an advantageous manner as described above.
- metal inserts are soldered to a partially blank instrument body, it is significantly less susceptible to corrosion.
- the hard metal element and the instrument body part are connected to one another by soldering, if the soldering chamber, in particular the soldering chamber section, is separated and if a distal end of the at least one instrument body part is machined by grinding, milling or polishing.
- the solder chamber provides the exact amount of solder required to solder the hard metal element and the instrument body part blank to one another.
- the processing of the instru ment body part by grinding, milling or polishing is particularly important
- a preferred embodiment of the medical instrument is only required in the area where a solder chamber section was provided, specifically in order to separate it. Such processing can be recognized and verified on a finished medical instrument.
- the medical instrument comprises two Instrumentenkör permaschine in the form of branches that are movably coupled to one another.
- they can be slidably mounted on one another.
- they can, for example, also be mounted on one another so as to be pivotable about a common pivot axis.
- a wide variety of instruments can be formed, for example clamps or needle holders.
- the manufacture of the medical instrument is further simplified in particular by the fact that the hard metal elements of the two instrument body parts are of identical design.
- the tool side surfaces of the two identical hard metal elements each have a macroscopic structure, each with a plurality of projections and recesses formed between them, that the projections of one hard metal element in a maximally approximate position of the two hard metal elements in the recesses of the each other hard metal element intervene and that the outer contours of the hard metal elements in the maximally approximated position overlap one another congruently or essentially congruently.
- the projections ge and depressions which can also be referred to as tooth tips and tooth bases, can thus interlock in the maximally approximated position, in particular a closed position of the instrument.
- the medical instrument is designed in the form of a needle holder. With such a needle holder, surgical needles can be safely grasped, held and handled.
- needle holders of this type are less susceptible to corrosion in comparison with needle holders known from the prior art.
- FIG. 1 a perspective schematic overall view of an exemplary embodiment of a medical instrument
- FIG. 2 a schematic perspective partial view of an instrument body part blank before the insertion of a hard metal element into a receptacle on the instrument body part blank;
- FIG. 3 a view similar to FIG. 2, but with the recess on the
- Instrument body part blank inserted hard metal element
- FIG. 4 a schematic longitudinal sectional view of an exemplary embodiment of an instrument body part blank with an inserted hard metal element when the soldering chamber is being filled with solder;
- FIG. 5 a schematic view of the arrangement from FIG. 4 during the
- FIG. 6 a schematic sectional view similar to FIG. 4 of another
- FIG. 7 a schematic perspective view of an exemplary embodiment of a hard metal element
- FIG. 8 a schematic sectional view of a distal end region of a
- FIG. 9 a schematic perspective view of a further exemplary embodiment of a hard metal element
- FIG. 10 a schematic perspective view of a further exemplary embodiment of a hard metal element
- FIG. 11 a schematic perspective view of a further exemplary embodiment of a hard metal element.
- FIG. 12 a sectional view similar to FIG. 4 of a further exemplary embodiment with a recess on one side undercut on the instrument body part blank.
- FIG. 1 A first exemplary embodiment of a medical instrument 10 is shown schematically in FIG. 1 and denoted as a whole by the reference numeral 10.
- the instrument 10 is designed in the form of a needle holder 12.
- the instrument 10 comprises two instru ment body parts 14 and 16 which are movably coupled to one another connected with each other.
- the end screw 18 defines a pivot axis 20 about which the instrument body parts 14 and 16 can be pivoted relative to one another.
- the instrument body parts 14 and 16 are designed in the form of branches 22 and 24, at the proximal ends of which a finger ring 26 respectively 28 is arranged.
- a locking device 30 is arranged between the proximal ends of the branches 22 and 24 to block a movement of the proximal ends of the instrument body parts 14 and 16 away from one another.
- the locking device 30 is designed in such a way that locking can be achieved for different distances between the proximal ends of the branches 22 and 24.
- the instrument body parts 14 and 16 are connected to one another in an end region 32 with the end screw 18.
- the end region 32 is designed in the form of a push-through connection.
- the instrument body parts 14 and 16 form jaw parts 34 and 36.
- the jaw parts 34 and 36 each have a recess 38 and 40, respectively, which receive a hard metal element 42 and 44, respectively.
- the hard metal elements 42 and 44 are connected to the respective instrument body part 14 and 16, respectively, by soldering.
- Distal ends 46 and 48 of the instrument body parts 14 and 16 are machined by grinding and / or polishing.
- needles 50 can be grasped between the jaw parts 34 and 36, held and guided to form seams.
- the recesses 38 and 40 are arranged and designed in such a way that they point towards one another in the finished instrument 10.
- the hard metal elements 42 and 44 also face one another and, when the instrument 10 is closed, that is to say jaw parts 34 and 36 that are maximally moved towards one another, rest against one another in a closed position.
- the needle 50 can then be held between the hard metal elements 42 and 44.
- the instrument body parts 14 and 16 are each formed from a semifinished instrument 52.
- the structure and manufacture of an instrument semifinished product 52 are explained in more detail below with reference to FIGS. 2 to 12.
- a distal end region 56 of an instrument body part blank 54 is shown as an example.
- the instrument body part blank 54 is formed from a metal.
- the metal is instrument steel.
- a semifinished instrument product 52 is formed from the instrument body part blank 54 which, after completion, forms the instrument body part 14.
- the recess 38 serves to receive the hard metal element 42 and defines a contact surface 58 for the hard metal element 42.
- the contact surface 58 is flat in the exemplary embodiment.
- the recess 38 has a first end surface 60 and a second end surface 62.
- the first end surface 60 extends transversely to the contact surface 58.
- the second end surface 62 also extends transversely to the contact surface 58.
- the first end surface 60 and the second end surface 62 point towards one another or essentially towards one another. Contours of the first end face 60 and the second end face 62 differ from one another in the exemplary embodiment of the instrument body part blank 54 shown in FIG.
- the instrument body part blank 54 further comprises a solder chamber 68 for receiving solder 70.
- the solder chamber 68 is arranged or formed on a distal end 72 of the instrument body part blank 54.
- the instrument body part blank 54 comprises a solder chamber section 74 on which the solder chamber 68 is arranged or formed.
- the solder chamber section 74 is designed to be detachable and, as will be described in the following, can be removed from the instrument body part blank 54 after soldering the hard metal element 42 to the instrument body part blank 54.
- the solder chamber section 74 is designed in the form of a substantially cuboidal body 76 that is elongated to the distal end region 56 of the instrument body part blank 54.
- the solder chamber 68 is designed in the form of a borehole 78, the solder chamber longitudinal axis 80 of which runs parallel or essentially parallel to a longitudinal axis 82 of the instrument body part blank 54 in the region of the distal end region 56.
- the longitudinal axis 82 runs parallel to a recess longitudinal axis defined by the recess 38, so that the solder chamber longitudinal axis 80 and the recess longitudinal axis 84 run parallel or essentially parallel to one another.
- the solder chamber 68 is fluidly connected to the recess 38. This is achieved via a transverse connection 86 which extends transversely, perpendicular in the exemplary embodiment shown in FIG. 2, to the longitudinal axis of the soldering chamber.
- the cross connection 86 is designed in the form of a cross bore 88.
- the cross connection 86 also penetrates the contact surface 58.
- a coupling receptacle 90 is also formed to accommodate a coupling projection 92 which is formed protruding from the hard metal element 42.
- the coupling receptacle 90 is arranged or formed on the solder chamber section 74. It has a coupling receiving contact surface 94 which defines a common contact plane 96 with the contact surface 58.
- the cross connection 86 penetrates the coupling receiving contact surface 94.
- the coupling projection 92 is designed to correspond to the coupling receptacle 90, so that the coupling projection 92 is received in the coupling receptacle 90 in a form-fitting or essentially form-fitting manner when the hard metal element 42 is inserted into the recess 38 is set, as can be clearly seen in FIG. 3, for example.
- the hard metal element 42 is designed in the form of a plate and has a soldering surface 98 for contact with the contact surface 58.
- a narrow solder gap 100 is formed between the contact surface 58 and the solder surface 98.
- a width of the solder gap 100 is a maximum of approximately 0.05 mm in order to be able to generate a capillary effect for the solder 70.
- the hard metal element 42 furthermore has a tool side surface 104, the tool side surface 104 and the soldering surface 98 pointing in opposite directions.
- the tool side surface 104 is structured and has a macroscopic structure 106.
- the structure 106 of the tool side surface 104 is formed regularly.
- the structure 106 has a plurality of projections 108 and depressions 110 formed between them.
- the projections 108 are formed in a pyramid shape. In one embodiment, they are designed as three-sided pyramids or four-sided pyramids.
- the hard metal element 42 has two side edges 112 and 114 extending transversely to the tool side surface 104.
- a bevel 116 or 118 is formed in the transition area of the tool side surface 104 and the side edges 112 and 114, respectively.
- An angle 120 which is included between the tool side surface 104 on the one hand and the plane delimiting the bevel 116 or 118 on the other hand is in a range from approximately 35 ° to approximately 55 °.
- the chamfers 116 and 118 run parallel to one another in exemplary embodiments and towards one another in the direction of a distal end 122 of the tool side surface 104 in other exemplary embodiments.
- the hard metal element 42 has a coupling projection soldering surface 124 for contact with the coupling receiving surface. As shown in particular in FIGS. 2 to 4, the coupling projection soldered surface 124 lies opposite the transverse bore 88 penetrating the coupling receiving contact surface 94.
- the hard metal element 42 is inserted into the recess 38, as already described, in such a way that the coupling projection 92 engages in the coupling receptacle 90 in a form-fitting manner.
- An end edge 126 of the hard metal element 42 pointing in the proximal direction then rests on the first end face 60 or is separated therefrom by a narrow gap.
- An end edge 128 of the coupling projection 92 pointing in the distal direction rests in a similar manner on the second end face 62.
- the solder chamber 68 is sent with the pasty solder 70 be.
- a grommet 130 of a tube 132 filled with solder 70 can be inserted into the bore 78 and the solder 70 pressed into the solder chamber 68.
- the soldering chamber 68 is dimensioned such that it can hold exactly as much solder 70 as is required for soldering the hard metal element 42 and the instrument body part blank 54 without excess.
- soldering takes place at high temperature in a vacuum, in a hardening furnace at around 1000 ° Celsius. Due to the capillary action of the solder gap 100, the solder 70 is drawn from the solder chamber 68 into the solder gap 100 ge. At the end of the solder gap 100, that is, between the first end face 60 and the end edge 126, the capillary effect breaks off and the solder does not flow any further. Likewise, the solder flow is also interrupted all around, i.e. between the side edges 112 or 114 and the contact surface 58. In contrast to the prior art, there is no uncontrolled flow of solder, so that both the coating with solder stop and a generous overhang stood of the hard metal element 42 compared to the instrument body part raw ling 54 can be dispensed with.
- the hard metal element 42 already has its final shape. As described, chamfers 116 and 118 can already be formed on the hard metal element 42 before soldering, so that manual chamfering of the hard metal element 42 after soldering to the instrument body part blank 54 can also be dispensed with.
- the solder chamber section 74 is separated from the partial blank 54 of the instrument body. In order to facilitate this, a predetermined breaking point 134 is formed at which the solder chamber section can be separated or bent by the action of force. With the solder chamber section 74, the coupling projection 92 is then separated from the hard metal element 42.
- the distal end of the instrument body part blank 54 and the hard metal element 42 are finished by grinding and polishing.
- the semifinished instrument product 52 is now completed and can be movably coupled as an instrument body part 14 together with another instrument body part 16 designed in the manner described, ie equipped with the hard metal element 44 to form the instrument 10.
- the predetermined breaking point 134 is designed in the form of a weakened area 136, to be precise between the end 46 of the instrument body part 14 and the solder chamber section 74.
- the instrument body part blank 54 is formed by cold or hot forming.
- a thickness of the coupling projection 92 is smaller than in the region of the tool side surface 104.
- FIG. 6 an embodiment is shown with a tool element 42, which is structured and has a plurality of projections 108 and depressions 110, which are regularly arranged or formed.
- the tool side surface 104 in the exemplary embodiment of the hard metal element 42 shown in FIGS. 4 and 5 is designed to be flat or microstructured.
- FIG. 7 an exemplary embodiment of a hard metal element 42 is shown by way of example, which does not have a coupling projection 92.
- the end edge 128 is concavely curved pointing in the distal direction and merges into the side edges 112 and 114 without kinks or edges.
- the end edge 126 is flat. In particular, it can be designed to be slightly inclined with respect to the soldering surface 98 in order to formed undercut to engage. Due to the differently shaped end edges 126 and 128, which correspond to end faces 16 and 62 on an exemplary embodiment of an instrument body part blank 54, not shown in the figures, a defined positioning of the Hartme tallelement 42 when soldering to the instrument body part blank 54 can also be achieved.
- the hard metal element 42 shown in FIG. 7 has a structure 106 such that this hard metal element 42 can be arranged both on the instrument body part 14 and on the instrument body part 16.
- the recesses 110 and projections 108 then engage in a corresponding manner.
- only a single type of hard metal element 42 is required to form the semifinished instrument products 52 to form the instrument body parts 14 and 16.
- FIGS. 9 to 11 further exemplary embodiments of hard metal elements 42 are shown by way of example. These differ in particular in the design of the end edge 126.
- the end edge 126 defines an angled shape with two end edge sections 138 and 140, which extend transversely to the soldering surface 98 and are inclined towards one another, so that a tip 142 pointing in the proximal direction is formed.
- the end edge 126 is curved in a concave manner pointing in the proximal direction.
- the end edge 126 is flat, but forms an angle 144 with the soldering surface 98 which is smaller than 90 °, in particular in a range between approximately 60 ° and almost 90 °.
- this beveled end edge 126 can engage in an undercut 146 of the recess 38.
- the rear The intersection 146 is delimited by the first end surface 60 and the contact surface 58.
- the angle 144 ideally corresponds to the angle defined by the undercut 146.
- An undercut as defined in connection with FIGS. 11 and 12 can also be provided in the other hard metal elements 42 and 44 described above, specifically either at the proximal or at the distal end thereof.
- the solder chamber 68 can be removed in a simple manner as described if a predetermined breaking point 134 is provided for this, for example by a taper or constriction between the solder chamber section 74 and a distal end of the recess 38 or 40.
- the proposed development also makes it possible to manufacture ready-to-install Hartme tall elements with tool-related geometry that no longer have to be significantly further processed after being soldered to the respective instrument body part blank 54.
- the proposed procedure enables a higher product quality to be achieved through improved process reliability and a reduction in manual work steps. This is accompanied by a reduction in the manufacturing costs, in that in particular rejects and workload can be reduced. Furthermore, it is an important advantage that corrosion problems of instruments at the user, which are production-related, namely, as described above, due to conventional soldering processes, are prevented can. In addition, greater stability of the instruments 10 can be achieved by reducing stress peaks and the associated risk of breakage can be reduced.
Landscapes
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Mechanical Engineering (AREA)
- Surgical Instruments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020105886.1A DE102020105886A1 (de) | 2020-03-05 | 2020-03-05 | Instrumentenhalbzeug und medizinisches Instrument |
| PCT/EP2021/055357 WO2021175931A1 (de) | 2020-03-05 | 2021-03-03 | Instrumentenhalbzeug und medizinisches instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4114279A1 true EP4114279A1 (de) | 2023-01-11 |
Family
ID=74858446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21709968.8A Pending EP4114279A1 (de) | 2020-03-05 | 2021-03-03 | Instrumentenhalbzeug und medizinisches instrument |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12303961B2 (de) |
| EP (1) | EP4114279A1 (de) |
| JP (1) | JP7671303B2 (de) |
| CN (1) | CN115426957A (de) |
| DE (1) | DE102020105886A1 (de) |
| WO (1) | WO2021175931A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020210664A1 (de) * | 2020-08-21 | 2022-02-24 | Aesculap Ag | Verfahren zum Herstellen eines chirurgischen Instruments zum Fassen und/oder Halten und/oder Führen einer Nadel |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2597394A (en) | 1951-06-30 | 1952-05-20 | Leonard R Snowden | Hardened jaw insert for needle holders |
| DE3219260A1 (de) * | 1982-05-21 | 1983-11-24 | Lawton GmbH & Co KG, 7200 Tuttlingen | Verfahren zum einbringen eines harten materials in den ausgesparten beanspruchungsbereich des grundkoerpers eines chirurgischen instruments und chirurgisches instrument |
| US5213093A (en) * | 1991-05-29 | 1993-05-25 | Applied Vascular Devices, Inc. | Endoscope with non-circular probe and method of making same |
| JP3384581B2 (ja) * | 1993-03-30 | 2003-03-10 | オリンパス光学工業株式会社 | 医療用把持具 |
| GB9322240D0 (en) * | 1993-10-28 | 1993-12-15 | Microsurgical Equipment Ltd | Improvements in and relating to needle holder jaws |
| GB9508328D0 (en) * | 1995-04-25 | 1995-06-14 | Univ Nottingham | Surgical gripping device |
| US6254597B1 (en) * | 1995-08-31 | 2001-07-03 | Biolase Technology, Inc. | Tissue remover and method |
| DE19733036C1 (de) * | 1997-07-31 | 1999-06-02 | Aesculap Ag & Co Kg | Chirurgischer Nadelhalter oder chirurgische Pinsette aus einem duktilen Metall mit einem Einsatz aus einem verschleißbeständigen Hartmetall, der über eine Lotschicht mit dem duktilen Metall verbunden ist und Verfahren zur Verbindung |
| DE202004008169U1 (de) * | 2004-05-19 | 2004-07-29 | Lawton Gmbh & Co. Kg | Chirurgischer Nadelhalter |
| US20070239202A1 (en) * | 2006-04-10 | 2007-10-11 | Rodriguez Richard A | Abrasively coated surgical end effector |
| WO2009105658A1 (en) | 2008-02-22 | 2009-08-27 | Gkn Sinter Metals, Llc | Brazed component and method of forming a brazed joint therein |
| US8745840B2 (en) * | 2011-07-11 | 2014-06-10 | Covidien Lp | Surgical forceps and method of manufacturing thereof |
| WO2014134304A1 (en) | 2013-02-28 | 2014-09-04 | Intuitive Surgical Operations, Inc. | Surgical instrument with curved jaws for surgical system |
| CN103386525A (zh) * | 2013-07-22 | 2013-11-13 | 上海医疗器械(集团)有限公司手术器械厂 | 不锈钢手术器械的真空钎焊-热处理复合工艺及其应用 |
| DE102015009858A1 (de) * | 2015-08-04 | 2017-02-09 | Karl Storz Gmbh & Co. Kg | Verfahren zum Fügen zweier Bauteile eines medizinischen Instruments, Verwendung eines Eisenbasislots und medizinisches Instrument |
| DE102016110294A1 (de) * | 2016-06-03 | 2017-12-07 | Olympus Winter & Ibe Gmbh | Chirurgisches Maulinstrument |
| WO2019097560A1 (ja) * | 2017-11-14 | 2019-05-23 | オリンパス株式会社 | 医療用把持具 |
| DE102017010987A1 (de) * | 2017-11-28 | 2019-05-29 | Karl Storz Se & Co. Kg | Laryngoskopspatel und Verfahren zum Herstellen eines Laryngoskopspatels |
-
2020
- 2020-03-05 DE DE102020105886.1A patent/DE102020105886A1/de active Pending
-
2021
- 2021-03-03 JP JP2022552980A patent/JP7671303B2/ja active Active
- 2021-03-03 CN CN202180019961.5A patent/CN115426957A/zh active Pending
- 2021-03-03 EP EP21709968.8A patent/EP4114279A1/de active Pending
- 2021-03-03 WO PCT/EP2021/055357 patent/WO2021175931A1/de not_active Ceased
-
2022
- 2022-08-28 US US17/897,173 patent/US12303961B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102020105886A1 (de) | 2021-09-09 |
| WO2021175931A1 (de) | 2021-09-10 |
| CN115426957A (zh) | 2022-12-02 |
| JP7671303B2 (ja) | 2025-05-01 |
| US20220410245A1 (en) | 2022-12-29 |
| JP2023516716A (ja) | 2023-04-20 |
| US12303961B2 (en) | 2025-05-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE3441036C2 (de) | ||
| DE102014105908B4 (de) | Werkzeug zur spanenden Bearbeitung eines Werkstücks und Verfahren zur Herstellung eines Werkzeugs | |
| DE19603285A1 (de) | Intramedullärer Nagel | |
| DE202005021068U1 (de) | Chirurgisches Maulinstrument | |
| EP3127645B1 (de) | Verfahren zum fügen zweier bauteile eines invasiven medizinischen instruments und invasives medizinisches instrument | |
| DE2061539B2 (de) | Zange fuer medizinische zwecke und verfahren zu deren herstellung | |
| WO2012072802A2 (de) | MEIßELHALTER UND MEIßELHALTERSYSTEM MIT EINEM MEIßELHALTER UND EINEM BASISTEIL | |
| DE4104615A1 (de) | Siebkorb | |
| DE3833040A1 (de) | Bohrhilfevorrichtung | |
| WO2021175931A1 (de) | Instrumentenhalbzeug und medizinisches instrument | |
| EP3097873B1 (de) | Werkzeug für ein zerlegbares medizinisches instrument | |
| EP3488758B1 (de) | Laryngoskopspatel und verfahren zum herstellen eines laryngoskopspatels | |
| WO1994016640A1 (de) | Instrumente zur zahnbehandlung | |
| WO2021198052A1 (de) | Medizinisches instrument und verfahren zum herstellen eines medizinischen instruments | |
| EP2653117A1 (de) | Kupplung zwischen zwei Teilen eines medizinischen Instruments | |
| EP1978886B1 (de) | Steckhülse für eine steckverbindung zur befestigung von zahnkranz- oder kiefersegmenten | |
| DE19954315A1 (de) | Bohrwerkzeug | |
| EP3300675A1 (de) | Komponente für ein medizinisches instrument und medizinisches instrument | |
| DE2136802A1 (de) | Brillenglasbefestigung | |
| DE10048676A1 (de) | Zange für zahntechnische und-medizinische Zwecke | |
| DE102023111743B3 (de) | Verfahren zur Herstellung eines Führungselements einer Rückstromsperre sowie ein entsprechendes Führungselement | |
| EP0574658B1 (de) | Einsetzwerkzeug für eine Schraubenezahnprothese | |
| EP4267788B1 (de) | Taftnadel | |
| DE3539892C2 (de) | ||
| DE102015100946B4 (de) | Dentalinstrument zur Präparation von Zähnen, insbesondere Zahnwurzelkanälen und Stift zum Einsatz in ein vorgesehenes Bohrloch, insbesondere ein mit einem erfindungsgemäßen Dentalinstrument erzeugtes Bohrloch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20220902 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20250917 |