Surgical, aseptic tool

Abstract

Surgical tool (10), in particular an aseptic surgical saw, comprising: - a housing (20) with a handle (30); - a drive (40) which is arranged in the housing (20) in a rotationally fixed manner and has a rotating drive shaft (41) along a longitudinal axis (102) of the housing (20); - an electrical energy unit (70) for supplying electricity to the drive (40) via a control unit (90); - a switch (80) for actuating the drive (40); wherein the electrical energy unit (70) is arranged along a transverse axis (101) transverse to the longitudinal axis (102) and detachably and removably in the handle (30), wherein the drive (40) is arranged detachably and removably in the housing (20), - an eccentric arrangement (45) associated with the drive shaft (41); - an oscillating member (50) having an output shaft (51) connected to a tool (60) via a connecting piece (52); wherein the eccentric arrangement (45) is operatively connected to the oscillating member (50) in a region (100) along the longitudinal axis (102), wherein the drive shaft (41) is operatively connected to the tool (60) via the eccentric arrangement (45), the oscillating member (50), the output shaft (51), the connecting piece (52) in such a way that the rotary movement of the drive shaft (41) is converted into an oscillating movement of the tool (60), characterized in that the eccentric arrangement (45) is directly operatively connected to the oscillating member (50), the tool (60) is a saw blade and the control unit (90) is arranged detachably and removably in the housing (20).

Description

background

[0001] The invention relates to a surgical tool, in particular an aseptic surgical saw, comprising: - a housing with a handle; - a drive which is arranged in the housing in a rotationally fixed manner and has a rotating drive shaft along a longitudinal axis of the housing; - an electrical energy unit for supplying the drive with electricity via a control unit; - a switch for actuating the drive; wherein the electrical energy unit is arranged along a transverse axis transverse to the longitudinal axis and is detachably and removably arranged in the handle, wherein the drive is detachably and removably arranged in the housing, - an eccentric arrangement associated with the drive shaft; - an oscillating member having an output shaft connected to a tool via a connecting piece; wherein the eccentric arrangement is operatively connected to the oscillating member in a region along the longitudinal axis, wherein the drive shaft is operatively connected to the tool via the eccentric arrangement, the oscillating member, the output shaft, and the connecting piece in such a way that the rotary movement of the drive shaft is converted into an oscillating movement of the tool. State of the art

[0002] US 2023 / 0009552 A1 discloses a surgical tool in which an aseptic power module can be inserted into and removed from the tool. This ensures that the power module is removed during disinfection of the surgical tool in an autoclave and is not exposed to thermal stress. The rotary motion of the drive is transmitted to the oscillator via a bevel gear.

[0003] From EP1428625A1 an oscillation drive is known in which the axis of a drive shaft and the axis of an output shaft are parallel to each other.

[0004] DE11 2021 004 591 T5 discloses an oscillating power tool in which an oscillating member or oscillating fork is coupled to the eccentric bearing to convert a rotary motion of the eccentric bearing into an oscillating motion. A drive shaft is connected to an eccentric shaft, which is connected to the eccentric bearing in such a way that a rotary motion of the drive shaft is converted into a wobbling motion of the eccentric bearing, causing the oscillating member to undergo a reciprocating or oscillating motion. Short description

[0005] The invention relates to a surgical tool, in particular an aseptic surgical saw, comprising the following: a housing with a handle; a drive which is arranged in the housing in a rotationally fixed manner and has a rotating drive shaft along a longitudinal axis of the housing; an electrical energy unit for electrically supplying the drive via a control unit; and a switch for actuating the drive. The electrical energy unit is arranged in the handle along a transverse axis transverse to the longitudinal axis and is detachably and removably mounted. The drive is detachably and removably mounted in the housing. The surgical tool further comprises an eccentric arrangement assigned to the drive shaft; an oscillating member with an output shaft which is connected to a tool via a connecting piece. The eccentric arrangement is operatively connected to the oscillating member in a region along the longitudinal axis.The drive shaft is operatively connected to the tool via the eccentric assembly, the oscillating member, the output shaft, and the connecting piece in such a way that a rotary movement of the drive shaft is converted into an oscillating movement of the tool. The eccentric assembly is directly operatively connected to the oscillating member. The tool is a saw blade. The control unit is detachably and removably arranged in the housing.

[0006] The advantage is that when disinfecting the surgical tool in an autoclave, the drive, control unit and electrical power unit can be removed so that they are not exposed to harmful temperatures.

[0007] In one variant, the control unit can be arranged detachably and removably in the handle together with the electrical energy unit, or the control unit can be arranged detachably and removably in the housing together with the drive.

[0008] The advantage is that there are two alternatives for assigning the control unit.

[0009] In a further variant, the electrical energy unit can be removed from the handle via a first opening associated with the handle, which is covered in a fluid-tight manner by a first cover, and the drive, the drive shaft and the eccentric arrangement can be removed from the housing via a second opening associated with the housing, which is covered in a fluid-tight manner by a second cover.

[0010] The advantage is that the already disinfected surgical tool is not re-contaminated by the potentially contaminated drive and the potentially contaminated electrical power unit and control unit.

[0011] In a special variant, the drive, drive shaft, eccentric assembly, electrical power unit, and control unit together form an insert. The insert can be removed from the first opening. The area is defined by the intersection of the longitudinal and transverse axes.

[0012] The advantage is that the removable components form a compact unit that can be more easily removed from the handle.

[0013] In another special variant, the drive, the electrical power unit, and the control unit are enclosed together in a first fluid-tight enclosure. The temperature within the first enclosure can be adjusted below a predetermined value using an external cooling circuit.

[0014] The advantage is that the items within the first shell are protected against the autoclave temperatures, while the remaining components can be disinfected in the autoclave.

[0015] In an advantageous variant, the eccentric arrangement comprises an eccentric shaft and an eccentric bearing. The oscillating member has a receptacle for receiving the eccentric bearing and an opening for receiving the output shaft. The receptacle is arranged in the housing so as to be rotatable about a rotational axis of the output shaft. The drive shaft is connected to the eccentric shaft. The eccentric shaft is operatively connected to the eccentric bearing in such a way that a rotational movement of the drive shaft is converted into a wobbling movement of the eccentric bearing, whereby the oscillating member experiences an oscillating movement about the rotational axis.

[0016] The advantage is that there are fewer wearing parts and that the weight is kept low.

[0017] In one variant, a surgical tool, in particular an aseptic surgical drill, comprises the following: a housing with a handle; a drive which is arranged in a rotationally fixed manner in the housing and has a rotating drive shaft along a longitudinal axis of the housing; an electrical energy unit for electrically supplying the drive via a control unit; a switch for actuating the drive. The electrical energy unit is arranged in the handle along a transverse axis transverse to the longitudinal axis and is detachably and removably mounted. The drive is detachably and removably mounted in the housing. The surgical tool further comprises a rotating drill chuck which is operatively connected to the drive shaft; a tool for receiving in the drill chuck. The drive shaft is operatively connected to the tool via the drill chuck in such a way that a rotary movement of the drive shaft causes a rotary movement of the tool.The tool is a drill and the control unit is detachable and removable in the housing.

[0018] The advantage is that when disinfecting the surgical tool in an autoclave, the drive, control unit and electrical power unit can be removed so that they are not exposed to harmful temperatures.

[0019] In a further variant, the electrical power unit can be removed from the handle via a first opening associated with the handle, which is fluid-tightly covered by a first cover. The drive, the drive shaft, and the eccentric assembly can be removed from the housing via a second opening associated with the housing, which is fluid-tightly covered by a second cover.

[0020] The advantage is that the already disinfected surgical tool is not re-contaminated by the potentially contaminated drive and the potentially contaminated electrical power unit and control unit.

[0021] In another variant, the housing and the handle as well as the remaining components except the electrical power unit, the drive and the control unit will be disinfected in an autoclave.

[0022] The advantage is that when disinfecting the surgical tool in an autoclave, the drive, control unit and electrical power unit can be removed so that they are not exposed to harmful temperatures.

[0023] In a special variant, a second fluid-tight enclosure surrounds the electrical power unit, and a third fluid-tight enclosure surrounds the drive unit together with the control unit. The temperature within the second enclosure and the third enclosure can be adjusted below a predetermined value using an external cooling circuit.

[0024] The advantage is that when the surgical tool is disinfected in an autoclave, the drive, control unit and electrical power unit are not exposed to harmful temperatures.

[0025] The above aspects of this disclosure and other aspects are explained in more detail below with reference to the accompanying drawings. Character list Fig. 1 a schematic side view of a surgical saw with a drive arranged along a longitudinal axis, Fig. 2 a schematic side view of a surgical saw with a drive arranged along a transverse axis, Fig. 3 a schematic side view of a surgical saw from Fig. 2 with a first shell, Fig. 4 a schematic plan view of an eccentric arrangement together with an oscillating member related to Fig. 1, Fig. 5 a schematic side view of the eccentric arrangement together with the oscillating member of Fig. 4 related to Fig. 1, Fig. 6 a schematic plan view of an eccentric arrangement together with an oscillating member related to Fig. 2 and Fig. 3, Fig. 7 a schematic side view of the eccentric arrangement together with the oscillating member of Fig. 6 related to Fig. 2 and Fig. 3, Fig. 8 is a schematic side view of a surgical drill with a drive arranged along a longitudinal axis, Fig. 9 a schematic side view of a surgical drill from Fig. 8 with a second shell and a third shell, Fig. 10 a schematic side view of a surgical drill with a drive arranged along a transverse axis. Detailed description

[0026] Fig. 1 shows a schematic side view of a surgical tool 10, in particular an aseptic surgical saw, comprising the following: a housing 20 with a handle 30; a drive 40, which is arranged in a rotationally fixed manner in the housing 20 and has a rotating drive shaft 41 along a longitudinal axis 102 of the housing 20; an electrical power unit 70 for electrically supplying the drive 40 via a control unit 90; a switch 80 for actuating the drive 40; an eccentric arrangement 45, which is assigned to the drive shaft 41; an oscillating member 50 with an output shaft 51, which is connected to a tool 60 via a connecting piece 52. The electrical power unit 70 is arranged along a transverse axis 101 transverse to the longitudinal axis 102 and is detachably and removably arranged in the handle 30. The drive 40 is detachably and removably arranged in the housing 20.The eccentric arrangement 45 is operatively connected to the oscillating member 50 in a region 100 along the longitudinal axis 102. The drive shaft 41 is operatively connected to the tool 60 via the eccentric arrangement 45, the oscillating member 50, the output shaft 51, and the connecting piece 52 such that a rotary movement of the drive shaft 41 is converted into an oscillating movement of the tool 60. The eccentric arrangement 45 is directly operatively connected to the oscillating member 50, and the tool 60 is a saw blade. The control unit 90 can be detachably and removably arranged in the handle 30. The control unit 90 is preferably detachably and removably arranged in the housing 20 so that the drive 40 and the control unit 90 can be combined as a compact unit. The handle 30 is an indispensable part for a surgeon to hold and guide the surgical tool.Since the handle 30 is already present, the handle 30 can also be used as a receptacle for the electrical power unit 70 or the drive. This logic also applies to the following embodiments.

[0027] According to one embodiment of the invention, the drive 40 comprises a DC electric motor.

[0028] The drive 40 is powered by the electrical power unit 70. The electrical connection between the drive 40 and the electrical power unit 70 is switched on and off by means of the switch 80. The control unit 90 regulates the activation of the drive 40 and controls the power supply to the drive 40 via the electrical power unit 70.

[0029] The surgical saw must be externally cleaned and then completely disinfected after each use, i.e., after each operation. For this purpose, the surgical saw is placed in an autoclave after external cleaning and disinfected, usually at a temperature of 121°C to 170°C and a pressure of 2 bar. This temperature range of 121°C to 170°C can be harmful to the standard components of the surgical saw, namely the drive 40, the control unit 90, and the electrical power unit 70.

[0030] According to a further embodiment of the invention, the drive 40, together with the output shaft 51, as well as the control unit 90 and the electrical power unit 70, are removed from the housing 20 so that the housing 20 and the components remaining therein can be disinfected in an autoclave. The control unit 90, the drive 40, and the electrical power unit 70 are cleaned separately and reinserted into the autoclaved housing 20 or the disinfected handle 30. The surgical saw is now disinfected and ready for the next use.

[0031] According to a particular embodiment, handle 30 has a first opening 32, which is covered in a fluid-tight manner by a first cover 31. The electrical power unit 70 can be removed from the handle 30 via the first opening 32. The housing 20 has a second opening 22, which is covered in a fluid-tight manner by a second cover 21. The drive 40 together with the drive shaft 41 can be removed from the housing 40 via the second opening 22. The drive 40, the electrical power unit 70, and the control unit 90 could still contain residual germs after cleaning. The covers must be fluid-tight so that after the drive 40, the electrical power unit 70, and the control unit 90 are returned to the disinfected housing 20, the residual germs do not reach the surface of the housing 20.

[0032] The tool 60 is a commercially available saw blade formed as an elongated metal strip with saw teeth at one end. The saw blade has a receiving arrangement at the other end for connection to the connecting piece 52.

[0033] Fig. 1 shows that the connection between the eccentric arrangement 45 and the oscillating member 50 takes place in a region 100 along the longitudinal axis 102. In the Fig. 1, the position of the region 100 along the longitudinal axis 102 can be chosen as desired. This illustration is shown in Fig. 4 and Fig. 5 in more detail. Fig. Figure 4 shows the eccentric assembly 45, which includes an eccentric shaft 46 and an eccentric bearing 47. The eccentric shaft 46 is non-rotatably connected to the drive shaft 41. The eccentric shaft 46 is rotatably connected to the eccentric bearing 47.

[0034] Fig. 4 is a schematic plan view of the eccentric assembly 45 together with the oscillating member 50 with reference to Fig. 1 and shows the oscillating member 50, which has an opening 56 for receiving the output shaft 51 and a receptacle 55 for receiving the eccentric bearing 47. The receptacle 55 is fork-shaped and has two opposing prongs 58 and 59. The eccentric bearing 47 is arranged between the prongs 58 and 59 of the oscillating member 50, so that the eccentric bearing 47 is freely movable with its outer surface 47a in frictional contact with the inner surface 58i of the prong 58 and the inner surface 59i of the prong 59, so that the eccentric arrangement 45 is directly operatively connected to the oscillating member 50. Directly means that no gearing is necessary between the eccentric arrangement 45 and the oscillating member 50.

[0035] A rotary movement of the drive shaft 42 sets the eccentric shaft 46 in a rotary movement, which causes a wobbling movement of the eccentric bearing 47, whereby the oscillating member 50 causes a back-and-forth movement or an oscillating movement about a rotational axis 105 of the output shaft 51. The rotational axis 105 of the output shaft 51 is in Fig. 5, which is substantially perpendicular to the longitudinal axis 102, which is the axis of rotation of the drive shaft 41.

[0036] Fig. 5 is a schematic side view of the eccentric assembly 45 together with the oscillating member 50 of Fig. 4 related to Fig. 1.

[0037] Fig. Figure 2 shows a schematic side view of a surgical tool 10, in particular an aseptic surgical saw. The difference between the Fig. 2 and the embodiment shown in Fig. 1 shown

[0038] Like in a Fig. In the embodiment shown in Figure 2, the drive 40, the drive shaft 41, the electrical power unit 70, and the control unit 90 are formed together as an insert 200 that can be removed from the first opening 32. Optionally, the eccentric arrangement 45 can also be assigned to the insert 200. Fig. 2 shows that the connection between the eccentric arrangement 45 and the oscillating member 50 takes place in a region 100 at an intersection point of the longitudinal axis 102 and the transverse axis 101.

[0039] In this embodiment, the position of the region 100 is predefined by the restriction to the intersection point of the longitudinal axis 102 and the transverse axis 101. This representation is shown in Fig. 6 and Fig. 7 more precisely.

[0040] Fig. 6 is a schematic plan view of the eccentric assembly 45 together with the oscillating member 50 with reference to Fig. 2 and Fig. 3 and shows that the oscillating member 50 has an opening 56 for receiving the output shaft 51 and a receptacle 55 for receiving the eccentric bearing 47. The receptacle 55 is fork-shaped and has two opposing prongs 58 and 59. The eccentric bearing 47 is arranged between the prongs 58 and 59 of the oscillating member 50, so that the eccentric bearing 47 is freely movable with its outer surface 47a in frictional contact with the inner surface 58i of the prong 58 and the inner surface 59i of the prong 59, so that the eccentric arrangement 45 is directly operatively connected to the oscillating member 50. Directly means that no gearing is necessary between the eccentric arrangement 45 and the oscillating member 50. A rotary movement of the drive shaft 42 sets the eccentric shaft 46 into a rotary movement, which causes a wobbling movement of the eccentric bearing 47, whereby the oscillating member 50 performs a back and forth movement oran oscillating movement about a rotational axis 105 of the output shaft 51. .

[0041] Fig. 7 is a schematic side view of the eccentric assembly 45 together with the oscillating member 50 of Fig. 6 related to Fig. 2 and Fig. 3. The rotation axis 105 of the output shaft 51 is in Fig. 7. The rotation axis 105 is substantially parallel to the transverse axis 101, which is the rotation axis of the drive shaft 41.

[0042] After the Fig. In the embodiment of the invention shown in Figure 2, the drive 40, together with the drive shaft 41, as well as the control unit 90 and the electrical power unit 70, are removed from the housing 20 so that the housing 20 and the components remaining therein can be disinfected in an autoclave. The control unit 90, the drive 40, and the electrical power unit 70 are cleaned separately and reinserted into the autoclaved housing 20 or the disinfected handle 30. The surgical saw is now disinfected and ready for the next use.

[0043] In the embodiment of Fig. 1, the rotational axis 102 of the drive shaft 41 is oriented substantially perpendicular to the rotational axis 105 of the output shaft 51 and in the embodiment of Fig. 2, the rotational axis 101 of the drive shaft 41 is oriented substantially parallel to the rotational axis 105 of the output shaft 51.

[0044] Fig. 3 shows a schematic side view of a surgical tool 10, in particular an aseptic surgical saw as in Fig. 2. In the Fig. In the embodiment illustrated in Figure 3, the surgical tool 10 additionally comprises a first sheath 300 that surrounds the drive 40, the electrical energy unit 70, and the control unit 90. Although the first sheath 300 has an opening 341 for the passage of the drive shaft 41, the first sheath 300 is nevertheless fluid-tight with respect to the housing 20 and the handle 30 as well as the drive shaft 41. The first sheath 300 comprises a first line 301 for the flow of a cooling fluid into the first sheath 300 and a second line 302 for the flow of the cooling fluid out of the first sheath 300. The directions of the inflow 311 and the outflow 312 are indicated for illustrative purposes. The cooling fluid can, for example, be a gaseous disinfectant or any other cooling fluid. The surgical tool 10 can be connected to a cooling fluid supply device to provide a cooling effect for the drive 40, the electrical power unit 70 and the control unit 90.The entire surgical tool 10, along with the cooling fluid supply device, can be placed in an autoclave for disinfection. The items outside the first enclosure 300 are disinfected as described above. The items inside the first enclosure 300 are protected from the autoclave temperatures.

[0045] Fig. 8 is a schematic side view of a surgical tool 400, which is an aseptic surgical drill comprising: a housing 20 with a handle 30; a drive 40 rotatably mounted in the housing 20 and having a rotating drive shaft 41 along a longitudinal axis 102 of the housing 20; an electrical power unit 70 for electrically supplying the drive 40 via a control unit 90; and a switch 80 for actuating the drive 40. The electrical power unit 70 is removably and detachably mounted in the handle 30 along a transverse axis 101 transverse to the longitudinal axis 102. The drive 40 is removably and detachably mounted in the housing 20. The surgical drill further comprises a rotating drill chuck 450 operatively connected to the drive shaft 41; and a tool 460 for receiving in the drill chuck 450.The drive shaft 41 is operatively connected to the tool 460 via the drill chuck 450 such that a rotational movement of the drive shaft 41 causes a rotational movement of the tool 460. The tool 460 is a drill, and the control unit 90 is detachably and removably arranged in the housing 20.

[0046] According to a special embodiment, analogous to the surgical tool 10 of Fig. 1, handle 30 has a first opening 32, which is covered in a fluid-tight manner by a first cover 31. The electrical power unit 70 can be removed from the handle 30 via the first opening 32. The housing 20 has a second opening 22, which is covered in a fluid-tight manner by a second cover 21. The drive 40 together with the drive shaft 41 can be removed from the housing 40 via the second opening 22. The covers must be fluid-tight so that after disinfecting the housing 20 and inserting the drive 40, the electrical power unit 70, and the control unit 90, which may still contain residual germs, these residual germs cannot escape to the outside.

[0047] The surgical drill must be externally cleaned and then completely disinfected after each use, i.e., after each operation. For this purpose, the surgical drill is placed in an autoclave after external cleaning and disinfected, usually at a temperature of 121°C to 170°C and a pressure of 2 bar. This temperature range of 121°C to 170°C can be harmful to the standard components of the surgical drill, namely the drive 40, the control unit 90, and the electrical power unit 70.

[0048] According to a further embodiment of the invention, the drive 40, together with the drive shaft 41, as well as the control unit 90 and the electrical power unit 70, are removed from the housing 20 so that the housing 20 and the components remaining therein can be disinfected in an autoclave. The control unit 90, the drive 40, and the electrical power unit 70 are cleaned separately and reinserted into the autoclaved housing 20 or the disinfected handle 30. The surgical drill is now disinfected and ready for the next use.

[0049] Fig. 9 is a schematic side view of a surgical drill of Fig. 8 with a second shell 500 and a third shell 600. In the Fig. In the embodiment shown in Figure 9, the electrical energy unit 70 is surrounded by a second fluid-tight casing 500, and the drive 40 together with the control unit 90 are surrounded by a third fluid-tight casing 600. A temperature within the second casing 500 and the third casing 600 can be adjusted below a predetermined value by means of an external cooling circuit. The second casing 500 is designed to be fluid-tight with respect to the housing 20 and the handle 30. The second casing 500 comprises a third line 501 for the flow of a cooling fluid into the second casing 500 and a fourth line 502 for the flow of the cooling fluid out of the second casing 500. The directions of the inflow 511 and the outflow 512 are indicated for illustrative purposes. Although the third casing 600 has an opening 641 for the passage of the drive shaft 41, it is nevertheless designed to be fluid-tight with respect to the housing 20 and the handle 30 as well as the drive shaft 41.The third shell 600 comprises a fifth line 601 for the cooling fluid to flow into the third shell 600 and a sixth line 602 for the cooling fluid to flow out of the third shell 600. The directions of the inflow 611 and the outflow 612 are indicated for illustrative purposes. The cooling fluid can be, for example, a gaseous disinfectant or any other cooling fluid. The surgical tool 40 can be connected to a cooling fluid supply device to provide a cooling effect for the drive 40, the electrical power unit 70, and the control unit 90. The entire surgical tool 400, together with the cooling fluid supply device, can be placed in an autoclave for disinfection. The objects outside the second shell 500 and the third shell 600 are disinfected as described above.The objects within the second shell 500 and the third shell 600 are protected against the autoclave temperatures.

[0050] Fig. 10 is a schematic side view of a surgical tool 700, which is an aseptic surgical drill, comprising: a housing 20 with a handle 30; a drive 40 rotatably mounted in the handle 30 and having a rotating drive shaft 41 along a transverse axis 101 (longitudinal axis 102) of the handle 30; an electrical power unit 70 for electrically supplying the drive 40 via a control unit 90; and a switch 80 for actuating the drive 40.

[0051] In one embodiment, the drive 40, the electrical power unit 70, and the control unit 90 are formed together as an insert 720 that can be removed from the first opening 32. In this embodiment, the position of a connecting piece 710 is predefined by the restriction to the intersection of the longitudinal axis 102 and the transverse axis 101.

[0052] The electrical power unit 70 is arranged along the transverse axis 101, transverse to the longitudinal axis 102, and is detachably and removably disposed in the handle 30. The drive 40 is detachably and removably disposed in the handle 30. The surgical drill further comprises a rotating drill chuck 750, which is operatively connected to the output shaft 42; a tool 760 for receiving in the drill chuck 750. The tool 760, clamped in the drill chuck 750, is operatively connected to the drive shaft 41 via the output shaft 42 such that a rotational movement of the drive shaft 41 causes a rotational movement of the tool 760. The tool 760 is a drill, and the control unit 90 is detachably and removably disposed in the handle 30. A connector 510 connects the input shaft 41 to the output shaft 42 such that rotational movement of the input shaft causes rotational movement of the output shaft. In one embodiment, the connector 710 is a flexible shaft according to the prior art.In another embodiment, the connector 710 is a multi-joint according to the prior art. A multi-joint typically comprises two fork pieces and a universal joint. Embodying the connector 710 as a multi-joint or a flexible shaft makes the construction of the surgical tool 700 simpler and lighter.

[0053] Any sensible combination of the designs is possible.

[0054] The second sheath 500 and the third sheath 600 of the surgical tool 400 can be used for the embodiment in Fig. 1 for the surgical tool 10 in order to protect the drive 40, the electrical energy unit 70 and the control unit 90 against the temperatures in the autoclave without having to remove these components from the housing 20.

[0055] The first sheath 300 of the surgical tool 10 of the embodiment of the surgical tool 10 in Fig.3 can be used for the surgical tool from US 2023 / 0009552 A1 in order to protect the drive 40, the electrical energy unit 70 and the control unit 90 against the temperatures in the autoclave without having to remove these components from the housing 20. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] US 2023 / 0009552 A1 [0002, 0055] EP 1428625A1

[0003] DE 11 2021 004 591 T5

[0004]

Claims

[1] Surgical tool (10), in particular an aseptic surgical saw, comprising: - a housing (20) with a handle (30); - a drive (40) which is arranged in the housing (20) in a rotationally fixed manner and has a rotating drive shaft (41) along a longitudinal axis (102) of the housing (20); - an electrical energy unit (70) for supplying electricity to the drive (40) via a control unit (90); - a switch (80) for actuating the drive (40); wherein the electrical energy unit (70) is arranged along a transverse axis (101) transverse to the longitudinal axis (102) and detachably and removably in the handle (30), wherein the drive (40) is arranged detachably and removably in the housing (20), - an eccentric arrangement (45) associated with the drive shaft (41); - an oscillating member (50) having an output shaft (51) connected to a tool (60) via a connecting piece (52); wherein the eccentric arrangement (45) is operatively connected to the oscillating member (50) in a region (100) along the longitudinal axis (102), wherein the drive shaft (41) is operatively connected to the tool (60) via the eccentric arrangement (45), the oscillating member (50), the output shaft (51), the connecting piece (52) in such a way that the rotary movement of the drive shaft (41) is converted into an oscillating movement of the tool (60), characterized by , that the eccentric arrangement (45) is directly operatively connected to the oscillating member (50), the tool (60) is a saw blade and the control unit (90) is arranged detachably and removably in the housing (20). [2] Surgical tool according to claim 1, wherein the control unit (90) is arranged together with the electrical energy unit (70) detachably and removably in the handle (30) or is arranged together with the drive (40) detachably and removably in the housing (20). [3] Surgical tool according to claim 2, wherein the electrical energy unit (70) can be removed from the handle (30) via a first opening (32) associated with the handle (30), which opening is covered in a fluid-tight manner by a first cover (31), and wherein the drive (40), the drive shaft (41) and the eccentric arrangement (45) can be removed from the housing (20) via a second opening (22) associated with the housing (20), which opening is covered in a fluid-tight manner by a second cover (21). [4] Surgical tool according to claim 1, wherein the drive (40), the drive shaft (41), the eccentric arrangement (45), the electrical energy unit (70) and the control unit (90) together form an insert (200), wherein the insert (200) is removable from the first opening (32), and wherein the region (100) is arranged at an intersection point of the longitudinal axis (102) and the transverse axis (101). [5] Surgical tool according to one of the preceding claims, wherein the housing (20) and the handle (30) are disinfectable at a temperature of 121 °C to 170 °C at a pressure of 2 bar. [6] Surgical tool according to claim 3, wherein the drive (40), the drive shaft (41), the electrical power unit (70) and the control unit (90) are together surrounded by a first fluid-tight shell (300), wherein a temperature within the first shell (300) is adjustable below a predetermined value by means of an external cooling circuit. [7] Surgical tool according to claim 6, which is disinfectable at a temperature of 121 °C to 170 °C and at a pressure of 2 bar. [8] Surgical tool according to one of the preceding claims, wherein the eccentric arrangement (45) comprises an eccentric shaft (46) and an eccentric bearing (47), wherein the oscillating member (50) has a receptacle (55) for receiving the eccentric bearing (47) and an opening (56) for receiving the output shaft (51), wherein the receptacle (55) is arranged in the housing (20) so as to be rotatable about an axis of rotation (105) of the output shaft (51), wherein the drive shaft (41) is connected to the eccentric shaft (46), wherein the eccentric shaft (46) is connected to the eccentric bearing (47) such that a rotational movement of the drive shaft (41) is converted into a wobbling movement of the eccentric bearing (47), whereby the oscillating member (50) experiences an oscillating movement about the axis of rotation (105). [9] Surgical tool (400), in particular an aseptic surgical drill, comprising: - a housing (20) with a handle (30); - a drive (40) which is arranged in the housing (20) in a rotationally fixed manner and has a rotating drive shaft (41) along a longitudinal axis (102) of the housing (20); - an electrical energy unit (70) for supplying electricity to the drive (40) via a control unit (90); - a switch (80) for actuating the drive (40); wherein the electrical energy unit (70) is arranged along a transverse axis (101) transverse to the longitudinal axis (102) and detachably and removably in the handle (30), wherein the drive (40) is arranged detachably and removably in the housing (20), - a rotating drill chuck (450) operatively connected to the drive shaft (41); - a tool (460) for mounting in the drill chuck (450); wherein the drive shaft (41) is operatively connected to the tool (460) via the drill chuck (450) in such a way that a rotational movement of the drive shaft (41) causes a rotational movement of the tool (460), characterized by , that the tool (460) is a drill and the control unit (90) is arranged detachably and removably in the housing (20) [10] Surgical tool according to claim 9, wherein the electrical energy unit (70) can be removed from the handle (30) via a first opening (32) associated with the handle (30), which opening is covered in a fluid-tight manner by a first cover (31), and wherein the drive (40) and the drive shaft (41) can be removed from the housing (20) via a second opening (22) associated with the housing (20), which opening is covered in a fluid-tight manner by a second cover (21). [11] Surgical tool according to claim 10, wherein the housing (20) and the handle (30) are disinfectable at a temperature of 121 °C to 170 °C at a pressure of 2 bar. [12] Surgical tool according to claim 11, wherein the electrical energy unit (70) is surrounded by a second fluid-tight shell (500) and the drive (40) together with the control unit (90) are surrounded by a third fluid-tight shell (600), wherein a temperature within the second shell (500) and the third shell (600) is adjustable below a predetermined value by means of an external cooling circuit. [13] Surgical tool according to claim 12, which is disinfectable at a temperature of 121 °C to 170 °C and at a pressure of 2 bar.

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