Medical Devices and Cooling / Rinse Fluid Hoses

Abstract

The present invention relates to a medical device (10) comprising a handpiece (2) surrounded by a handpiece housing and preferably having an interior for receiving a driver, an effector disposed on or capable of being coupled to the handpiece (2), and a delivery device for delivering a cooling fluid and / or a rinsing fluid (5) to the effector, the delivery device comprising a guide tube or cannula (4) passing at least partially longitudinally through the handpiece and rigidly connected to the handpiece (2), the guide tube or cannula being open to the outside in distal and proximal handpiece regions and provided and designed to longitudinally guide a preferably disposable cooling / rinsing fluid hose (1) that is forced into the guide tube (4) during insertion movement of the cooling / rinsing fluid hose (1). The present invention also relates to methods for using the cooling / rinsing fluid hose (1) and the medical device.

Description

[Technical Field]

[0001] The present invention relates to a medical device, a cooling fluid / rinsing fluid hose, and a method of using a medical device with a cooling fluid / rinsing fluid hose. [Background technology]

[0002] Medical devices, in particular surgical devices in the form of handheld devices such as handheld drills or handheld milling cutters, are already known in the prior art and provide for the supply of rinsing fluid through hoses or tubes fixedly attached to the outside of the handheld device or through passages fixedly guided inside the handheld device. In particular, a sterile rinse set (bag / hose combination) is usually connected or coupled to a hose or tube for rinsing the sterile rinse fluid through the hose or tube. The sterile fluid must exit the sterile hose and then pass through a hose or tube that is guided to the tool / site on or within the handpiece. The hose or tube, respectively, usually has a small inner diameter due to a low rinse volume or low rinse flow rate.

[0003] As a result, the prior art has several drawbacks. For example, there is a risk of contamination. In this example, a dirty handpiece hose / tube interior can result in the presence of contaminants and / or bacteria in the sterile rinse fluid. Furthermore, there is a risk of the hose / tube becoming clogged or prone to becoming clogged. Narrow hoses / tubes can be prone to becoming clogged due to the buildup of residues, for example, salt crystals from the isotonic saline solution passing through them. In this case, mechanical cleaning, for example with a wire, is necessary.

[0004] Externally mounted or fixed spray nozzles can also have the drawbacks of obstructing visibility and ergonomics, for example, when mounted in viewing and holding areas. Furthermore, clip installation can be complicated and require additional components, for example, in the case of handpiece-dependent clips. In this case, a universal clip may be a compromise solution with individual disadvantages. Coil modifications can be expensive.

[0005] However, the prior art always has the drawback that the maintenance of cleanliness is complicated and expensive.

[0006] There may be a need to provide a concept for a medical device with a cooling fluid / rinsing fluid hose that improves maintainability of cleanliness. Summary of the Invention [Problem to be solved by the invention]

[0007] It is therefore an object of the present invention to avoid or at least mitigate the drawbacks of the prior art, in particular to improve the maintainability of cleanliness, ease of handling. [Means for solving the problem]

[0008] This object is solved in a general purpose device according to the present invention by providing a medical device. The medical device has a handpiece. The handpiece preferably has an interior surrounded by a handpiece housing for receiving a drive unit. The medical device has an effector. The effector is arranged on the handpiece or is connectable to the handpiece. The medical device further has a supply device for cooling and / or rinsing fluid to the effector. The supply device has a guide tube or guide cannula. The guide tube or guide cannula passes at least partially through the interior in the longitudinal direction of the handpiece. Furthermore, the guide tube or guide cannula is fixedly connected to the handpiece. The guide tube or guide cannula is open to the outside in the distal and proximal handpiece regions. Furthermore, the guide tube or guide cannula is provided and configured to longitudinally guide a cooling / rinsing fluid hose, preferably of the disposable type, which is inserted into the guide tube during insertion movement of the cooling / rinsing fluid hose.

[0009] This has the advantage that disposable hoses can be used and the cleanliness of the medical device or its supply device for cooling and / or rinsing fluid can be maintained. This allows for easy orientation of the direction of action of the fluid jet provided by the guide tube or guide cannula by an effector, e.g., a tool. The handpiece can be a surgical handpiece for receiving a tool that can be used for a surgical procedure.

[0010] Thus, the medical device may be a surgical device including a handpiece. The handpiece or medical device may be battery-powered. To this end, the battery may be removably connected to the handpiece or may be exclusively connected to the handpiece. Alternatively, power may be provided via a wired energy supply.

[0011] In particular, a cooling / rinsing fluid hose may be provided for intraoperative supply / pour of fluids such as ultrasonic or functional media for cooling and rinsing of tools attached to a handpiece, application site, and environment, e.g., bone, tissue, etc., during surgery. The tool may be a sawing tool, milling tool, drill tool, ultrasonic tool, radio frequency tool, or laparoscopic tool.

[0012] The supply fluid may be provided in the form of a functional medium, such as isotonic saline NaCl. The fluid may be delivered to the surgical site from a rinse fluid container as part of the medical device via a cooling fluid / rinse fluid hose.

[0013] The guide tube or guide cannula may be configured to enter the interior of the handheld device at the distal end / end region of the handheld device and exit the interior of the handheld device at the proximal end / end region of the handheld device. Specifically, the guide tube or guide cannula may be configured, for example, as a continuous, free-flowing tube without any elements / components. In this case, the guide tube or guide cannula may be an open tube. The open tube may have two connection points to the outside.

[0014] In particular, a cooling / rinsing fluid hose may be provided to pass through the guide tube or guide cannula during operation. In particular, the hose length of the cooling / rinsing fluid hose may be longer than the length of the guide tube or guide cannula, such that the cooling / rinsing fluid hose extends at least entirely through the guide tube or guide cannula. To this end, the guide tube or guide cannula or the cooling / rinsing fluid hose may be provided such that, in the uncompressed state of the cooling / rinsing fluid hose, the cooling / rinsing fluid hose has a circumference larger than the diameter of the guide tube or guide cannula. The diameter of the guide tube or guide cannula and / or the cooling / rinsing fluid hose may be substantially the same along its entire length. Variations in diameter due to manufacturing are intended to be encompassed by the term "substantially." The circumference of the cooling / rinsing fluid hose may be compressible so that it can slide through the guide tube or guide cannula. Similarly, the cooling / rinsing fluid hose may be configured to be flexible. A rounded and / or closed end of the cooling / rinsing fluid hose may facilitate pushing it through the guide tube or guide cannula.

[0015] Advantageous embodiments are claimed in the dependent claims and are explained in more detail below.

[0016] The guide tube or guide cannula may have a plurality of exit openings into said interior along the length of said interior, and may preferably be perforated.

[0017] This allows for easy cleaning of the internally mounted motor, for example, by connecting a cleaning hose to the guide tube (without inserting a cooling hose into the guide tube).

[0018] The guide tubes or guide cannulas may be distributed near or adjacent to the interior of the handpiece housing surrounding said interior.

[0019] This saves space and keeps the tubing length short.

[0020] Additionally, a guide tube or cannula may begin at an end projecting distally from the handpiece housing at an angle relative to the longitudinal axis of the handpiece and smoothly transition to a central region within the interior that extends parallel to the longitudinal axis of the handpiece, with the guide tube or cannula forming a primarily obliquely oriented inlet port. The central region may smoothly open into an end projecting proximally from the handpiece housing at an angle relative to the longitudinal axis of the handpiece and forming an outlet port. The end may be bent outside the handpiece housing to form an outlet end that extends proximally parallel to the longitudinal axis of the handpiece.

[0021] This allows the tubing to be positioned in an optimal geometric manner in the grip area of ​​the handpiece.

[0022] In particular, the central region with each end may be curved, for example in an S shape.

[0023] The inlet port may further comprise a coupling for connecting a cleaning fluid line to which the cooling fluid / rinsing fluid hose is routed.

[0024] As a result, the tube can be cleaned in a simple manner after use.

[0025] The above-defined object is also solved in the universal device according to the invention by providing a flexible cooling / rinsing fluid hose for insertion into a guide tube of a medical device, preferably according to the above-mentioned medical device, the hose end of said cooling / rinsing fluid hose being closed under or through the formation of an outwardly curved or outwardly rounded end cap, thus forming said hose end for insertion into said guide tube or guide cannula.

[0026] Therefore, the maintenance of the cleanliness of the medical device can be improved.

[0027] The cooling fluid / rinsing fluid hose may be provided for single use (disposable hose). The cooling fluid / rinsing fluid hose may be made of plastic. In particular, the cooling fluid / rinsing fluid hose may be a plastic cannula. In this manner, the cooling fluid / rinsing fluid hose may be manufactured at low cost. For example, the plastic may include a soft plastic such as polyethylene, polyurethane, or polyvinyl chloride. As a result, the ease of maintaining cleanliness may be improved.

[0028] Additionally, the ends of the cooling / rinsing fluid hoses may be closed or configured in such a way that the closed configuration reduces the risk of injury. Reduce The guide tube or cannula may be rounded to improve sliding ability through the guide tube or cannula of the medical device.

[0029] In particular, this may further improve the ease of maintaining cleanliness.

[0030] The cooling / rinsing fluid hose may have several different, preferably increasing, diameter regions along the length of the hose, beginning at the inserted hose end, and the diameter regions may be arranged successively with a continuous transition or shoulder. For example, the cooling / rinsing fluid hose may have multiple inner diameter regions, in which case the inner diameter may decrease from the tip along the cooling / rinsing fluid hose. An indicator on the cooling / rinsing fluid hose may indicate the size of the inner diameter along the cooling / rinsing fluid hose in a direction away from the tip.

[0031] The above-defined object is also solved by providing a method for using a medical device, preferably with a cooling fluid / rinsing fluid hose as described above, preferably provided for fluid delivery as described above. The method includes providing a medical handpiece, a handpiece housing of the medical handpiece forming an interior. A hose guide tube having a distal tube inlet and a proximal tube outlet is fixedly attached to the outside of the handpiece housing, respectively, in the interior. The hose guide tube may be a guide tube or a guide cannula as described above, or vice versa. The method includes inserting a cooling fluid / rinsing fluid hose, the cooling fluid / rinsing fluid hose having a sealed insertion end, from the outside of the handpiece housing into the distal tube inlet and pushing the cooling fluid / rinsing fluid hose through the guide tube to or beyond the proximal tube outlet. After guiding the cooling fluid / rinsing fluid hose through the guide tube, the method includes cutting off the closed insertion end of the cooling fluid / rinsing fluid hose protruding from the tube outlet.

[0032] Therefore, the maintenance of the cleanliness of the medical device can be improved.

[0033] Furthermore, the cutting of the distal end of the cooling / rinsing fluid hose guided through the guide tube or guide cannula may be performed prior to the operation in which the handpiece or medical device is used. Similarly, the cutting of the insertion end, also referred to herein as the distal end, of the cooling / rinsing fluid hose guided through the guide tube or guide cannula may be performed after the operation. In this regard, further cutting of the distal end formed by the cutting may be performed after the operation.

[0034] The cooling fluid / rinsing fluid hose can then be pulled out of the guide tube or guide cannula, which, when disconnected after surgery, can also improve the sterility of the guide tube or guide cannula.

[0035] The interior of the handpiece may further house functional units, such as a drive unit in the form of an electric motor, an oscillation unit, or a high-frequency module. The functional units may be configured to interact with the tool to perform corresponding operations. When the functional units operate, the cooling / rinsing fluid hoses may also operate, or fluid may be provided simultaneously from corresponding rinsing fluid containers. For this purpose, a pump may be provided in connection with the rinsing fluid container to pump fluid from the rinsing fluid container through the cooling / rinsing fluid hoses provided by a guide tube or guide cannula.

[0036] The cooling / rinsing fluid hose may have a circumference that fits around a guide tube or guide cannula contained within the medical device. In particular, the cooling / rinsing fluid hose may be configured to be guided by a user in a targeted manner from outside the handpiece through a guide tube or guide cannula within the handpiece of the medical device.

[0037] In this way, maintainability of the cleanliness of the medical device or its tubing, respectively, can be achieved. In particular, the medical device can be a handpiece of a surgical instrument / device.

[0038] Conversely, the circumference of a guide tube / guide cannula contained within the medical device may also fit around the circumference of the cooling fluid / rinsing fluid hose.

[0039] In other words, the present invention relates to the provision of cooling and rinsing fluids in surgical handpieces. In particular, the provision of cooling and rinsing fluids may be provided via a flexible, disposable spray nozzle / cannula that passes through a full or partial cannulation inside the surgical handpiece. The handpiece cannulation may also be provided for internal rinsing of the handpiece during cleaning / sterilization.

[0040] In one or more embodiments, the handpiece may include a cannulation that passes wholly or partially through the interior of the handpiece. Examples include tubing made of steel, plastic, silicone, etc. In particular, the handpiece may be 3D printed.

[0041] In one or more embodiments, a disposable, flexible plastic cannula can be pushed through the cannula insertion from behind onto the application location. The universal length of the cannula can allow cutting to provide for the creation of a custom, ideal nozzle length based on the label or user preference. After use, the disposable plastic cannula is pulled out of the cannula insertion and discarded. The cannula insertion can have one or more openings to the interior of the handpiece.

[0042] In other words, the present invention has one or more of the following advantages: The sterility of the rinse fluid within the rinse set (bag / hose combination) can be maintained. The sterile rinse fluid flows from the bag to the tool / site only through sterile, disposable members. The cannulation of the interior of the handpiece can maintain cleanliness and prevent contamination and blockage of the tubing. To avoid transferring contamination into the cannula when retracting the cannula, a contaminated cannula tip can be cut off before retraction. Because the cannula has a larger diameter compared to the prior art, excellent cleanability of the cannula can be provided. The use of a larger cannula with one or more openings into the interior of the handpiece can also be used for internal flushing of the handpiece during cleaning / sterilization. Here, for example, a coupling point for a rinse adapter for rinsing the cannula and the interior can be provided. Furthermore, a rinse set, particularly a bag and hose with a cannula, can be provided. A single cannula with a universal length for individual adaptation can also be provided, which can also be used for several different handpieces. Additionally, it may be advantageous to eliminate the visual obstruction of the cannula, eliminating ergonomic drawbacks.

[0043] According to the same or further embodiments, a flexible disposable plastic cannula may be provided with a closed front tip. This may have the advantage that there is no risk of blockage due to forward pushing of residues within the cannula insertion. After pushing, cutting of the cannula tip to an individual ideal length may be performed as indicated or desired by the user. The cannula may be provided with a stepped inner diameter region. Depending on the position of the cut when the cannula is disconnected, different rinse jet diameters may be selected. In this regard, the sections / regions may be marked with a color. The cannula may also be provided with a conical inner diameter region. Depending on the position of the cut when the cannula is disconnected, different rinse jet diameters may be selected or provided in a continuously variable manner. The section regions may also be marked with a color.

[0044] In this case, when it is said that a member is "connected" to another member, and thus "connected," this may mean that the member is directly connected to or in direct contact with the other member, but it should be noted that there may be additional members between them. On the other hand, when it is said that a member is "directly connected" to another member, this should be understood to mean that there are no other members between them. The invention is explained below with the aid of the drawings, in which: [Brief explanation of the drawings]

[0045] [Figure 1a] 1 shows a schematic diagram of a first variant of a handpiece with a fixedly attached rinse tube. [Figure 1b] 1 shows a schematic diagram of a second variant of a handpiece having a fixedly attached rinse tube. [Figure 1c] 10 shows a schematic diagram of a third variant of a handpiece with an integrated rinse tube. [Figure 2a] 10 shows a schematic diagram for cleaning the rinse tube on the handpiece. [Figure 2b]10 shows a schematic diagram for cleaning the rinse tube in the handpiece. [Figure 3a] 1 shows a first schematic diagram of a rinse hose attachable to a handpiece. [Figure 3b] 10 shows a second schematic diagram of a rinse hose that can be attached to a handpiece. [Figure 3c] 10 shows a third schematic diagram of a rinse hose that can be attached to a handpiece. [Figure 3d] 10 shows a fourth schematic diagram of a rinse hose that can be attached to a handpiece. [Figure 3e] A fifth schematic diagram of a rinse hose that can be attached to a handpiece is shown. [Figure 4a] 1 shows a schematic diagram of the handpiece before insertion of the cooling / rinsing fluid hose. [Figure 4b] 1 shows a schematic diagram of a handpiece with a cooling fluid / rinsing fluid hose in use. [Figure 4c] 1 shows a schematic diagram of a handpiece with an attached cleaning device. [Figure 5a] 1 shows a schematic diagram of a cooling fluid / rinsing fluid hose. [Figure 5b] 1 shows a schematic diagram of a cooling fluid / rinsing fluid hose having different inner diameter regions. [Figure 5c] 1 shows a schematic diagram of a cooling fluid / rinsing fluid hose having a conical inner diameter region. DETAILED DESCRIPTION OF THE INVENTION

[0046] The figures are only of a schematic nature and are intended solely for the purpose of understanding the invention. Identical elements are provided with the same reference numerals. Features of the individual embodiments may be interchanged.

[0047] Additionally, spatially relative terms such as "disposed below," "below," "lower than," "disposed above," "above," "left," "left side," "right," "right side," etc. may be used herein to succinctly describe the relationship of an element or structure to one or more other elements or structures shown in the figures. Spatially relative terms are intended to include other orientations of the elements in use or operation in addition to the orientation shown in the figures. Elements may be oriented differently (rotated 90 degrees or at a different orientation) and the spatially relative descriptors used herein may be interpreted accordingly.

[0048] (Figure description) Medical devices, particularly handpieces, methods, and cooling / rinsing fluid hoses will now be described with reference to embodiments.

[0049] The principle of the present invention is to provide a sterile supply of a cooling and / or rinsing fluid 5, hereinafter referred to as fluid, during use of a handpiece 2 during surgery. In this regard, the handpiece 2 has a guide tube or guide cannula 4, hereinafter referred to as tube, extending from the proximal end / end of the handpiece 2 through the handpiece interior to the distal end / end of the handpiece 2. A cooling and / or rinsing fluid hose 1, hereinafter referred to as hose, provided for supplying the fluid 5 and closed at the front, can be pushed through the tube 4. Before operation, the tip of the hose 1 can be released by cutting it off, for example, using a knife or scissors. At the end of operation, the hose 1 can be withdrawn from the tube 4 again. Optionally, a cleaning process can still be provided after the hose 1 has been removed from the tube 4. After removal from the tube 4, the hose 1 is discarded.

[0050] Further details and aspects are mentioned in connection with the above and below described embodiments.

[0051] Figures 1a, 1b, and 1c show different variations of a handpiece 2 having a fluid supply 12 for flushing. In particular, Figure 1a shows a handpiece 2 having a tubing as a fixedly attached fluid supply 12. Figure 1b shows a handpiece 2 having a tubing and an accessory tool 3 as a fixedly attached fluid supply 12. Figure 1c shows a handpiece 2 having an integrated tubing and accessory tool 3 as the fluid supply 12.

[0052] Further details and aspects are mentioned in connection with the embodiments described above or below. The embodiments shown in Figures 1a, 1b, and 1c may include one or more optional further features corresponding to one or more aspects mentioned in connection with the proposed concept or to the embodiments described below with respect to Figures 2a to 5c.

[0053] Figures 2a and 2b show different flushing techniques for flushing tubing as a fluid supply 12 of a handpiece 2. Figure 2a shows flushing tubing as a fluid supply 12 outside the handpiece 2. Figure 2b shows flushing tubing as a fluid supply 12 inside the handpiece 2. Figure 2a substantially corresponds to the arrangement of Figures 1a and 1b. Figure 2b substantially corresponds to the arrangement of Figure 1c.

[0054] Further details and aspects are mentioned in connection with the embodiments described above or below. The embodiment shown in Figures 2a and 2b may include one or more optional further features corresponding to one or more aspects mentioned in connection with the proposed concept or to one or more embodiments described above (e.g., Figure 1) or below (e.g., Figures 3a-5c).

[0055] 3a to 3e show an embodiment in which a hose is attachable to the handpiece 2 as a fluid supply 12 via a fastening device 9. The hose is connectable or connected to the handpiece 2 by a clamp as fastening device 9. The clamp may be detachably connected to the handpiece 2. In particular, the clamps may be spaced apart to save material in the fastening device 9. The hose is guided through a channel in the fastening device 9 or the hose is fixedly connected to said channel. Figures 3d and 3e show different types of tools with corresponding tool receptacles 8.

[0056] Further details and aspects are mentioned in connection with the embodiments described above or below. The embodiment shown in Figures 3a-3e may include one or more optional further features corresponding to one or more aspects mentioned in connection with the proposed concept or to one or more embodiments described above (e.g., Figures 1-2b) or below (e.g., Figures 4a-5c).

[0057] 4a-4c and 5a-5c illustrate the invention in further terms. FIG. 4a shows a schematic diagram of the handpiece 2 prior to insertion of the hose 1 into the tube 4 contained therein. The tube 4 extends through the interior of the handpiece 2. Accordingly, the medical device may be referred to as the handpiece 2 itself, or as comprising the handpiece 2 and the tube 4. An outlet region A, also referred to as the proximal end, is shown to the left of the region defined by the tube 4 inside the handpiece, also referred to as the central region, and an inlet region E, also referred to as the distal end, is shown to the right of the central region. The inlet region E is used to insert the hose 1 into the tube 4. The tube 4 is open and has an end piece outside the handpiece 2. The end piece may be part of the inlet region E or the outlet region A, respectively. The hose 4 may be inserted into the tube 4 from the distal end of the handpiece 2. The tube inlet of the inlet region E may protrude from the handpiece 2. The tube 4 in the outlet region A may be curved in an S shape so that the tube 4 has the same direction, i.e., is parallel, at two different locations in the outlet region A. The tube 4 may also protrude from the handpiece 2 in the inlet region E outside the handpiece 2. In this regard, the tube in the inlet region E outside the handpiece 2 may protrude obliquely in a direction away from the handpiece 2.

[0058] A portion of the tubing 4 inside the handpiece may be located within or surrounded by the grip portion of the handpiece 2 that is gripped by the user during use. Thus, at the very portion of the handpiece 2 that is provided for manual use, the corresponding portion of the tubing 4 may be guided within the handpiece 4, thereby improving user comfort.

[0059] FIG. 4b shows a schematic diagram of the handpiece 2 with the hose 1 in use. In particular, the hose 1 is fully inserted through the tube 4. A rinse jet of fluid 5 is emitted to the left of the hose 4, in the direction of action of the tool 3 placed in the tool receptacle 8. The fluid 5 can be dispensed during operation. After operation, the hose 1 can be withdrawn from the tube 4. This case is shown in FIG. 4c.

[0060] FIG. 4c shows a schematic diagram of the handpiece 2 to which the cleaning device 6 is connected. The cleaning device can be connected after operation. For this purpose, the cleaning device 6 can distribute a cleaning fluid into the tube 4 to clean the tube 4. The cleaning fluid can contain, for example, alcohol or an oxidizing agent such as hydrogen peroxide for sterilization. For this purpose, the tube 4 has perforations in its interior, for example in the part between the inlet region E and the outlet region A, the so-called central region. The perforations can be provided to rinse the interior via the cleaning fluid delivered into the tube 4. For example, the perforations can be provided over the length d of the central region or distributed respectively.

[0061] In particular, it should be noted here that the tip of the hose 1 can be cut off after the hose 1 has been pushed through the tube 4. This corresponds to the state before use in Fig. 4b. This or another cutting step can also be performed after use in Fig. 4b, before the hose 1 is retracted again. This will become clearer in the following description of Figs. 5a-5c.

[0062] Further details and aspects are mentioned in connection with the embodiments described above or below. The embodiment shown in Figures 4a-4c may include one or more optional further features corresponding to one or more aspects mentioned in connection with the proposed concept or to one or more embodiments described above (e.g., Figures 1-3e) or below (e.g., Figures 5a-5c).

[0063] Figures 5a to 5c show firstly the hose 4 as it is provided before use, see Figure 5a, and then two different embodiments of the hose 4, see Figures 5b and 5c.

[0064] In this regard, FIG. 5a shows a schematic view of the hose 1. A cutting line T is also shown schematically. Furthermore, a pair of scissors is shown diagrammatically and serves as an example of a cutting means S, which may be a knife with a sharp blade or the like for cutting the hose 1 along the cutting line T. This allows for removal of the tip of the hose 1. In order for the hose 1 to be cuttable, a suitable material may be provided for the hose 4. For example, the hose 4 may be made of a plastic such as PVC or silicone. As described above with reference to FIGS. 4a-4c, the hose 1 may be cut along the cutting line, for example with the cutting means S, after the hose 1 has been pushed through the tube 4. This may be done before and / or after the operation.

[0065] Because hose 1 is closed prior to use, bacteria and pathogens and other contaminants cannot enter the system or interior of hose 1. To this end, one or both ends of hose 1 may be closed prior to use. Both ends may then be cut at the aforementioned cut line T for use. Cut line T itself need not be present on hose 1; it merely serves to illustrate that the end of hose 1 is cut off before fluid 5 is flowed through hose 1.

[0066] FIG. 5b shows a schematic diagram of a hose 1 having different inner diameter regions a, b, and c. The inner diameter regions decrease in the order a, b, and c in the direction away from the tip of the hose 1. This can provide a stepped inner diameter for the hose 1. For this purpose, the outer diameter of the hose 1 can also be stepped or complementary to the inner diameter of the hose 1. By cutting off the corresponding inner diameter regions a, b, or c via the cutting means S, the rinse jet diameter can be set. Therefore, an optimal pressure of the rinse fluid 5 can be provided during use.

[0067] 5c shows a further schematic view of the hose 1, which in this case has a conical inner diameter region a. The inner diameter region b connected to said region a can be straight. This also makes it possible, only in this case, to infinitely adjust the pressure of the fluid 5 selected for the application via the cutting means S depending on the position of the cut.

[0068] Therefore, the hose 1 shown in Figures 5b and 5c can flexibly provide a rinse jet diameter of the fluid 5 that is preferred by the user. The following items are elements that are included in the claims of the international application: (Item 1) A medical device comprising: a handpiece (2) preferably having an interior surrounded by a handpiece housing for receiving a driver; an effector disposed on the handpiece (2) or capable of being coupled to the handpiece (2); a supply device for cooling and / or rinsing fluid (5) to said effector; Equipped with A guide tube or guide cannula (4) passing at least partially through the interior of the handpiece in the longitudinal direction thereof, fixedly connected to said handpiece (2), preferably configured in a continuous manner; open to the outside in the distal and proximal handpiece regions; A medical device (10) comprising a cooling / rinsing fluid hose (1), preferably of a disposable type, provided and configured to longitudinally guide the cooling / rinsing fluid hose (1) inserted into the guide tube or guide cannula (4) during insertion movement of the cooling / rinsing fluid hose (1). (Item 2) Item 1. The medical device (10) according to item 1, wherein the cooling fluid / rinsing fluid hose (1) has a hose length greater than the length of the guide tube or guide cannula (4) such that the cooling fluid / rinsing fluid hose (1) extends at least entirely through the guide tube or guide cannula (4). (Item 3) 3. The medical device (10) according to item 1 or 2, wherein the guide tube or guide cannula (4) has a plurality of exit openings into the interior in a longitudinal portion of the interior, preferably perforated. (Item 4) 3. The medical device (10) according to item 1 or 2, wherein the guide tubes or guide cannulas (4) are distributed near or adjacent to the inside of the handpiece housing surrounding the interior. (Item 5) The guide tube or cannula (4) begins at an end projecting distally from the handpiece housing at an angle to the longitudinal axis of the handpiece, forming an inlet port that is exclusively oriented at an angle, a central region within the interior extending parallel to the longitudinal axis of the handpiece and smoothly transitioning into an end projecting proximally from the handpiece housing at an angle to the longitudinal axis of the handpiece and forming an exit port; 5. The medical device (10) of any one of items 1 to 4, wherein the end is bent outside the handpiece housing to form an outlet end that extends proximally parallel to the longitudinal axis of the handpiece. (Item 6) 6. The medical device (10) according to item 5, wherein the inlet port further comprises a coupling for connecting a cleaning fluid line when the cooling fluid / rinsing fluid hose (1) is pulled out. (Item 7) 6. The medical device (10) according to any one of items 2 to 5, wherein the guide tube or guide cannula (4) and the cooling fluid / rinsing fluid hose (1) are configured such that, in an uncompressed state, the cooling fluid / rinsing fluid hose (1) has a circumference that is larger than the diameter of the guide tube or guide cannula (4). (Item 8) A flexible cooling fluid / rinsing fluid hose (1), comprising: Preferably, the medical device (10) is inserted into the guide tube or guide cannula (4) of any one of items 1 to 5, A flexible cooling fluid / rinsing fluid hose (1), one hose end of which is preferably closed under or through an outwardly curved or rounded end cap, thus forming the hose end that is inserted into the guide tube or guide cannula (4). (Item 9) 7. The flexible cooling fluid / rinsing fluid hose (1) according to item 6, wherein the cooling fluid / rinsing fluid hose (1) is provided for disposable use and is preferably made of plastic. (Item 10) the cooling fluid / rinsing fluid hose (1) has, starting from the end of the hose to be inserted and in the longitudinal direction of the hose, several different, preferably increasing diameter regions (a, b, c), 10. The flexible cooling fluid / rinsing fluid hose (1) according to item 8 or 9, wherein the diameter regions (a, b, c) are arranged successively with a continuous transition or forming a shoulder. (Item 11) A method for using a medical device (10), preferably according to any one of items 1 to 5, together with a cooling fluid / rinsing fluid hose (1) provided for supplying a fluid (5), preferably according to any one of items 6 to 8, comprising the following steps: providing a medical handpiece (2), the handpiece housing of which defines an interior in which hose guide tubes (4) having a proximal tube inlet and a distal tube outlet are fixedly attached to the exterior of the handpiece housing; inserting a cooling / rinsing fluid hose (1) sealed at its insertion end into the distal tube inlet from outside the handpiece housing and forcing the cooling / rinsing fluid hose (1) through the guide tube (4) to or beyond the proximal tube outlet; guiding the cooling fluid / rinsing fluid hose (1) through the guide tube (4), and then cutting off the closed insertion end of the cooling fluid / rinsing fluid hose (1) protruding from the tube outlet; A method comprising: [Explanation of symbols]

[0069] 1: Cooling fluid / rinsing fluid hose 2: Handpiece 3: Tools 4: Guide tube / guide cannula 5: Cooling / Rinse Fluid 6: Cleaning device 7: Mechanical cleaning aid 8: Tool receptacle 9: Fixed device 10: Medical devices 11: User's hand 12:Fluid supply part S: Cutting means T: Cutting line a: First inner diameter region b: Second inner diameter region c: Third inner diameter region d: length of the central region

Claims

1. A medical device comprising: a handpiece having an interior surrounded by a handpiece housing for receiving a driver; an effector disposed on or capable of being coupled to the handpiece; a device for supplying cooling and / or rinsing fluid to the effector; a cooling fluid / rinsing fluid hose; Equipped with the supply device for the cooling and / or rinsing fluid comprises a guide tube or guide cannula passing at least partially through the interior of the handpiece in the longitudinal direction; The guide tube or guide cannula is fixedly connected to the handpiece and configured in a continuous manner; open to the outside in the distal and proximal handpiece regions; A medical device provided and configured to longitudinally guide the cooling / rinsing fluid hose inserted into the guide tube or guide cannula during an insertion movement of the cooling / rinsing fluid hose.

2. 2. The medical device of claim 1, wherein the cooling fluid / rinsing fluid hose has a hose length greater than a length of the guide tube or guide cannula such that the cooling fluid / rinsing fluid hose extends at least entirely through the guide tube or guide cannula.

3. 3. The medical device of claim 1, wherein the guide tube or guide cannula has a plurality of exit openings into the interior along a longitudinal portion of the interior.

4. 3. The medical device of claim 1, wherein the guide tube or guide cannula is positioned off-center within the interior of the handpiece housing, near or adjacent to the interior of the handpiece housing that surrounds the interior.

5. the guide tube or cannula starting from an end projecting distally from the handpiece housing at an angle relative to the longitudinal axis of the handpiece and forming an inlet port oriented exclusively at an angle, the guide tube or cannula smoothly transitioning to a central region within the interior, the central region extending parallel to the longitudinal axis of the handpiece and opening smoothly into an end projecting proximally from the handpiece housing at an angle relative to the longitudinal axis of the handpiece and forming an outlet port; 5. The medical device of claim 1, wherein the end is bent outside the handpiece housing to form an outlet end that extends proximally parallel to the longitudinal axis of the handpiece.

6. The medical device of claim 5 , wherein the inlet port further comprises a coupling for connecting a cleaning fluid line when the cooling / rinsing fluid hose is withdrawn.

7. 6. The medical device of claim 2, wherein the guide tube or guide cannula and the cooling fluid / rinsing fluid hose are configured such that, when the cooling fluid / rinsing fluid hose is in an uncompressed state, the cooling fluid / rinsing fluid hose has a circumference that is greater than the diameter of the guide tube or guide cannula.

8. 10. The medical device of claim 1, the cooling fluid / rinsing fluid hose is a flexible cooling fluid / rinsing fluid hose; the flexible cooling / rinsing fluid hose is inserted into the guide tube or guide cannula of the medical device; A medical device in which one hose end of the flexible cooling fluid / rinsing fluid hose is closed under or through the formation of an outwardly curved or rounded end cap, thereby forming the hose end that is inserted into the guide tube or guide cannula.

9. The medical device of claim 8 , wherein the flexible cooling / rinsing fluid hose is provided for single use.

10. the flexible cooling / rinsing fluid hose has several different diameter regions along the length of the cooling / rinsing fluid hose, beginning at the hose end of the cooling / rinsing fluid hose that is inserted into the guide tube or guide cannula; 10. The medical device of claim 8 or 9, wherein the diameter regions are arranged continuously with a continuous transition or forming a shoulder.

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