JP2005211269A - Surgical excision instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surgical excision instrument easily setting an optimal number of revolutions according to a type of a probe, miniaturizing the probe and a handpiece and simplifying and reducing the cost of the instrument. <P>SOLUTION: This surgical excision instrument is characterized in having the probe excising a biotissue with a blade, the handpiece for detachably attaching the probe, operating means 50 and 51 for operating the increase/decrease of the number of revolutions of the blade, a number of revolutions setting means 60 setting the number of revolutions of the blade based on a first operation signal outputted from the operating means 50 and 51 by a predetermined first operating method, and a variable range change means 60 changing a number of revolutions variable range variably set by the number of revolutions setting means 60 based on a second operating signal outputted from the operating means 50 and 51 by a second operating method different from the first operating method. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a surgical excision apparatus for excising tissue such as meniscus and cartilage in a joint cavity, nucleus pulposus tissue in an intervertebral disc, and the like.

2. Description of the Related Art In recent years, surgical excision devices have been used to excise tissues such as the meniscus and cartilage in a joint cavity and nucleus pulposus tissue in an intervertebral disc while observing the body with an arthroscope or the like. Among these excision devices, a probe having a blade for cutting an area to be excised, a handpiece having a built-in motor for rotating the blade, and a probe to which the probe is interchangeably attached, and the hand And a control unit electrically connected to the piece.
Here, there are a plurality of types of probes, one for grinding bone and one for excising an object, and the optimum rotation speed of the blade to be used differs depending on the type.
Conventionally, in order to set such an optimum number of rotations for each probe, an identification magnet is provided in each probe, and the magnetic field is detected by a reed switch built in the handpiece. An ablation device that identifies the type of the blade and automatically sets the optimum rotation speed of the blade has been proposed (see, for example, Patent Document 1).
Special Table 2000-507839

  However, according to the above configuration, since a member for automatic detection such as a magnet and a reed switch is required, the probe and the hand piece become large and the configuration of the apparatus itself becomes complicated. Furthermore, there is a problem that costs increase due to these members.

  The present invention has been made to solve such a problem, and it is possible to easily set the optimum rotational speed of the blade in accordance with the type of the probe and to reduce the size of the probe and the handpiece. Further, an object of the present invention is to provide a surgical excision apparatus that can make the apparatus itself simple and inexpensive.

In order to solve the above problems, the present invention provides the following means.
The invention according to claim 1 is a probe capable of excising a living tissue with a blade provided at a tip, a handpiece having a power source for detachably attaching the probe and rotating the blade, and the power source And setting the rotation speed of the blade based on a first operation signal output from the operation means by a predetermined first operation method. Based on a possible rotation speed setting means and a second operation signal output from the operation means by a second operation method different from the first operation method or an input signal from an external device, the rotation speed setting means Variable range changing means for changing the variable range of the rotation speed that can be variably set with the variable speed change range within the rotation speed variable range that can be changed by the variable range changing means. Based on the set setting result by means and by comprising supply means for supplying power, to the power source.

According to the surgical excision apparatus according to the present invention, when the operator operates the operation means by the first operation method, a first operation signal is output from the operation means, and based on the first operation signal, The rotation speed of the blade is set by the rotation speed setting means. On the other hand, when the operation means is operated by the second operation method, a second operation signal is output from the operation means, and the variable range is changed based on the second operation signal or based on the input signal of the external device. The variable range of the rotation speed of the blade is changed by the means. Then, electric power is supplied to the power source provided on the handpiece by the supply means, and the blade provided at the tip of the probe rotates.
Accordingly, by intentionally operating the operation means by the second operation method, the blade rotation speed variable range is changed, and the optimum rotation speed intended by the operator can be easily set.
Therefore, there is an effect that a member for automatic detection such as a magnet or a reed switch becomes unnecessary.

  The invention according to claim 2 further comprises an upper limit rotational speed display unit for displaying an upper limit value of the rotational speed variable range changed by the variable range changing means in the surgical resection device according to claim 1. It is characterized by.

According to the surgical excision apparatus according to the present invention, it is possible to set the rotational speed while confirming the upper limit value of the rotational speed variable range by the upper limit rotational speed display section.
Therefore, there is an effect that an appropriate number of rotations according to the type of probe can be set reliably.

The invention according to claim 3 is the surgical excision device according to claim 1 or 2, further comprising a set rotation speed display section for displaying the set rotation speed set by the rotation speed setting means. To do.
According to the surgical excision apparatus of the present invention, there is an effect that the rotational speed can be quickly set while confirming the set rotational speed by the set rotational speed display section.

  According to a fourth aspect of the present invention, in the surgical resection device according to any one of the first to third aspects, the operating means includes at least an increase switch for increasing the rotational speed of the blade by a predetermined amount, The rotation speed setting means performs an increase setting of the rotation speed by the first operation method based on a first operation time of the increase switch, and the variable range changing means has a first time longer than the first operation time. The rotation speed variable range is changed by the second operation method of the increase switch based on an operation time of 2.

According to the surgical excision apparatus according to the present invention, when the increase switch is operated for a predetermined time, the first operation signal is output using this as the first operation time. Based on the first operation signal, the rotational speed of the blade is set by the rotational speed setting means. Further, when the increase switch is operated beyond the predetermined time, the second operation signal is output using this as the second operation time. Based on the second operation signal, the rotation speed variable range is changed by the variable range changing means.
Thus, the change operation can be performed while making the operator aware of the change in the rotation speed variable range.
Therefore, there is an effect that the operator can surely change the rotation speed variable range appropriate for the type of blade.

  According to a fifth aspect of the present invention, in the surgical resection device according to any one of the first to third aspects, the operating means includes an increase switch for increasing the rotational speed of the blade by a predetermined amount, and the increase. At least a change-over switch provided together with the switch, wherein the rotational speed setting means performs an increase setting of the rotational speed by the first operation method using only the increase switch, and the variable range changing means includes the increase switch And changing the rotation speed variable range by the second operation method combining the changeover switch and the changeover switch.

According to the surgical excision apparatus according to the present invention, the first operation signal is output when only the increase switch is operated, and the second operation signal is output when the increase switch and the changeover switch are operated in combination. The Then, the rotation speed of the blade is set or the rotation speed variable range is changed according to these signals.
Thus, the change operation can be performed while making the operator aware of the change in the rotation speed variable range.
Therefore, there is an effect that the operator can quickly change an appropriate rotation speed variable range according to the type of probe.

According to a sixth aspect of the present invention, in the surgical resection device according to any one of the third to fifth aspects, the setting is performed according to the state of the rotation speed variable range changed by the variable range changing means. The display mode of the rotation speed display unit is changed.
According to the surgical excision apparatus according to the present invention, the display form of the set rotational speed display section is changed according to the state of the rotational speed variable range.
Therefore, there is an effect that can alert the operator about the predetermined rotation speed variable range.

  According to the present invention, it is possible to easily and reliably set the optimum rotation speed of the blade according to the type of probe. Further, since members for automatic detection such as a magnet and a reed switch are not required, the probe and the hand piece can be reduced in size, and the apparatus itself can be made simple and inexpensive.

(Example 1)
Hereinafter, a surgical resection apparatus according to a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the surgical excision apparatus 1 in this embodiment is used together with an arthroscope 2 to treat an affected area.
First, the arthroscope 2 used with the surgical excision apparatus 1 will be described.
The arthroscope 2 is obtained by connecting an arthroscope insertion portion 4 for insertion into a joint cavity and a camera head 6 incorporating an image sensor via a branch portion 5 and an eyepiece portion 7. The arthroscope insertion part 4 is inserted into the joint cavity through a trocar 8 punctured in the knee part 3. A water supply source 10 is connected to the trocar 8 through a water absorption tube 9, and physiological saline is sequentially flowed into the joint cavity from the water supply source 10, thereby ensuring a visual field in the joint cavity, and waste is generated. It is supposed to be removed.

The branch portion 5 is connected to the light source device 21 via the light guide cable 20 so that light is irradiated from the distal end of the arthroscope insertion portion 4 toward the affected part.
The camera head 6 is connected to a video processor 23 via a cable 22, and the video processor 23 is connected to a monitor device 25 via a monitor cable 24. Thereby, an image signal from the camera head 6 is output to the monitor device 25 via the video processor 23, and an observation image in the joint cavity is displayed on the monitor device 25.

Next, the surgical excision apparatus 1 according to the present invention will be described.
The surgical excision apparatus 1 includes a hand piece 11 having a probe 26 and a hand piece main body 27, a control unit (supplying means) 28 as a power source, and a foot switch 29 as a drive switch.
As shown in FIG. 2, the probe 26 is used at a low speed and includes a cutter 26a for excising the affected part and a drill bar 26b for cutting the bone around the affected part at a high speed. Can be selectively and interchangeably attached to the handpiece body 27.

  Further, the probe 26 includes an outer probe 33 formed in a tubular shape, an opening 34 is formed at the tip thereof, and a joint portion 31 is provided at the rear end. A through hole (not shown) is formed in the joint portion 31, and an inner probe 32 having a blade 30 at the tip and formed in a tubular shape is passed through the through hole. The inner probe 32 is rotatable in the outer probe 33 with the blade 30 emerging from the opening 34. A through passage 35 is formed at the rear end of the inner probe 32 in a direction orthogonal to the axis of the inner probe 32, so that liquid and waste sucked from the gap of the blade 30 are sent to the handpiece body 27. It has become. The drill bar 26b is provided with a red display portion 36 in the vicinity of the joint portion 31 so that a difference from the cutter 26a can be easily recognized.

  The handpiece body 27 includes a fixing screw 37 that receives and locks the joint portion 31 of the probe 26, and a communication passage 38 that is connected to the through passage 35 when the probe 26 is attached. Further, the handpiece body 27 includes a valve lever 39 for adjusting the flow rate of the communication path 38 and a motor (power source) 44 for rotating the blade 30 via the inner probe 32. Furthermore, a base part 40 to which one end of the suction tube 41 shown in FIG. 1 is attached, and a connection part 42 for connecting the cable 43 and the motor 44 to the base part on the opposite side of the fixing screw 37 of the handpiece body 27. Is provided. A suction device (not shown) is attached to the other end of the suction tube 41, and liquid or the like taken from the gap of the blade 30 is sucked into the suction device via the inner probe 32, the communication path 38 and the suction tube 41. It has come to be. Further, the motor 44 and the control unit 28 are electrically connected via the cable 43.

  As shown in FIGS. 3A and 3B, the control unit 28 includes a handpiece connector 57, and the cable 43 shown in FIG. 1 is connected to the handpiece connector 57. . The control unit 28 includes a rotation speed increase switch (operation means, increase switch) 50 and a rotation speed decrease switch (operation means) 51 for setting the rotation speed of the blade 30, that is, the rotation speed per unit time. A control circuit (rotation speed setting means, variable range changing means) 60 for setting the set rotation speed based on output signals from the switches 50 and 51 is provided. Furthermore, according to the output signal of the control circuit 60, the setting rotation speed display part 52 which displays a setting rotation speed with a number, and the setting rotation speed display LED 53 which displays a setting rotation speed with a graph are provided. A red portion 56 is provided at the edge of the rotation speed increase switch 50.

The red portion 56 is for calling attention to the operator to set an appropriate rotation speed and upper limit value according to each probe 26 together with the red display portion 36 of the drill bar 26b shown in FIG. . The set rotation speed display LED 53 is for assisting in intuitive recognition of the set rotation speed, and is an auxiliary display for the set rotation speed display section 52.
Under such a configuration, either the rotation speed increase switch 50 or the rotation speed decrease switch 51 is set to 1 second or less (until the rotation speed displayed on the set rotation speed display section 52 reaches the desired rotation speed). The first output signal is output by intermittently pressing at a time interval of (first operation time) (first operation method), and based on the first output signal, the control circuit 60 determines a predetermined value. The number of revolutions is set.

Further, the control unit 28 includes a lower limit rotational speed display section 54 that displays a lower limit value of the settable rotational speed, and an upper limit rotational speed display section 55 that displays an upper limit value. These lower limit rotation speed and upper limit rotation speed are set to, for example, 500 and 6000, respectively, at the time of resetting the power supply, and as shown in FIG. 3A, both display portions 54 and 55 have “500” and “6000” respectively. It is displayed. The rotational speed of the blade 30 can be set only between the rotational speeds shown in the display sections 54 and 55, that is, within the rotational speed variable range.
Further, the rotation speed increase switch 50 has a function of changing the upper limit value by long pressing (second operation time) for 1 second or longer (second operation method). That is, when long-pressed in this way, the second output signal is output from the rotation speed increasing switch 50, and the upper limit rotation speed is changed to 10000 by the control circuit 60 based on the second output signal. As shown in FIG. 3B, the display of the upper limit rotational speed display section 55 is displayed as “10000”. Thus, when the upper limit rotational speed is set to 10,000, the set rotational speed displayed on the set rotational speed display section 52 blinks.
Reference numeral 58 denotes a power switch, and reference numeral 59 denotes a power indicator LED.

  FIG. 4 shows a block diagram of the control unit 28. As shown in FIG. 4, the signal output from the foot switch 29 is sent to the control circuit 60. Further, the control circuit 60 includes a display having a rotation speed increase switch 50, a rotation speed decrease switch 51, a set rotation speed display section 52, a set rotation speed display LED 53, a lower limit rotation speed display section 54, an upper limit rotation speed display section 55, and the like. An input circuit 63 is connected to perform processing according to various inputs and signals from the foot switch 29 to control the output circuit 62. The output circuit 62 is connected to the power supply circuit 61 and supplies power corresponding to the control of the control circuit 60 to the motor 44 built in the handpiece body 27.

  Further, as shown in FIG. 1, the foot switch 29 includes a right pedal 29a for rotating the motor 44 built in the handpiece body 27 to the right and a left pedal 29b for rotating it to the left. When the operator steps on these pedals 29a and 29b with his / her foot, the motor 44 rotates at the speed of the set rotation speed displayed on the set rotation speed display section 52. The blade 30 exposed from the opening 34 is also rotated.

Next, the operation of the surgical excision apparatus 1 in the present embodiment configured as described above will be described.
When a treatment is performed using the surgical excision apparatus 1 in the present embodiment, as shown in FIG. 1, the arthroscope 2 is inserted into the joint cavity, and the affected part is displayed on the monitor device 25. Then, a drill bar 26b is attached to the handpiece main body 27, and a predetermined high speed is set as will be described later. In this state, the foot switch 29 is depressed to rotate the blade 30 at a high speed. The blade 30 is pressed to cut the bone around the affected area and provide a through hole for inserting the cutter 26a. Next, the drill bar 26b is removed from the handpiece body 27, and the cutter 26a is mounted.

  Then, as described later, a predetermined low speed for the cutter 26a is set. With the cutter 26a mounted, the handpiece body 27 is gripped and the cutter 26a is inserted from the through hole. Then, while watching the screen of the monitor device 25, the blade 30 is fed to the vicinity of the affected part, and the meniscus, cartilage and the like to be excised are excised. During this time, physiological saline is sent from the water supply source 10 into the joint cavity, and the physiological saline is constantly circulated in the joint cavity by sucking the physiological saline from the gap of the blade 30 using the suction device. . By this recirculation action, the waste, blood, etc. in the joint cavity are sequentially sucked by the suction device. When the excision of the affected area is completed, other predetermined treatment is performed and the treatment is completed.

In the surgical excision apparatus 1 according to the present embodiment, the optimum number of rotations corresponding to the probe 26 is set as follows.
When power is turned on to the control unit 28, as shown in FIG. 5, in step 1, the set rotational speed n is initialized. That is, when the power switch 58 shown in FIG. 3 is pressed and the power is turned on, the rotation speeds “500” and “6000” are displayed on the lower limit rotation speed display section 54 and the upper limit rotation speed display section 55, respectively. In addition, if the set value when the power is turned off the previous time is 6000 rpm or less, the set rpm is displayed at that time, and the previous set value is 6000 rpm. If it exceeds, 6000 is returned.

  Subsequently, a drill bar 26b is attached to cut the bone. At this time, in order to rotate the blade 30 at a high speed, it is necessary to set, for example, 8000 rotations exceeding the upper limit value of 6000. Therefore, in order to change the upper limit value, the rotation speed increase switch 50 is continuously pressed for 1 second or more (step 2: Yes). Then, a second signal is output from the rotation speed increase switch 50, and the upper limit value is switched from 6000 to 10000 by the control circuit 60 based on this second signal, and “10000” is displayed on the upper limit rotation speed display section 55. (Step 8). At this time, the display of the set rotational speed display 52 flashes to alert the operator that the high speed rotation is being set.

  Then, while looking at these display sections 52, 53, 54, and 55, the rotation speed increase switch 50 is pressed intermittently (at a time interval of 1 second or less) (step 9). Then, a first signal is output from the rotation speed increasing switch 50, the rotation speed is set by the arithmetic processing unit based on the first signal, and the rotation speed is displayed on the set rotation speed display section 52 and the set rotation speed display LED 53. Is displayed. Therefore, the rotational speed increase switch 50 is pressed until the display of the set rotational speed display section 52 becomes “8000”. Then, when the foot switch 29 is depressed in a state where the setting rotational speed display section 52 is “8000” (step 10: Yes), the blade 30 is rotated at 8000 revolutions (step 11). On the other hand, in a state where the foot switch 29 is not depressed (Step 10: No), the handpiece 11 is turned off (Step 12).

  Furthermore, when the work of cutting the bone at the above 8000 rotations is finished, the power is turned off, the drill bar 26b is removed, the cutter 26a is attached, and then the power is turned on again. At this time, since the previous display of the set rotational speed display 52 was 8000, the rotational speed immediately after power-on is reset to 6000, and “6000” is displayed on the set rotational speed display 52 (step 2: No). Then, in order to rotate the inner probe 32 at a low speed (for example, 3000 rotations), while watching each of the display units 52, 53, 54, and 55, the rotation speed lowering switch until the display of the set rotation speed display unit 52 becomes “3000”. 51 is pressed intermittently (with a time interval of 1 second or less) (step 4). Then, when the foot switch 29 is stepped on in a state where the setting rotational speed display section 52 is “3000” (step 5: Yes), the blade 30 is rotated at 3000 rotations as described above (step 6). . On the other hand, in a state where the foot switch 29 is not depressed (Step 5: No), the handpiece 11 is turned off (Step 12). Thereafter, the process returns to step 2 and the same processing is repeated.

As described above, according to the surgical resection device 1 of the present embodiment, the upper limit value is changed by pressing the rotation speed increase switch 50 longer than the normal operation, that is, by pressing and holding for 1 second or longer. The change operation can be performed while making the user aware of the change of the upper limit value. For this reason, it is possible to reliably set the optimum number of rotations intended by the operator and to prevent the number of rotations from being set higher than necessary.
In addition, various members for automatic recognition are not required as compared with a conventional apparatus in which each rotation number is automatically set by attaching the cutter 26a and the drill bar 26b to the handpiece body 27. Thus, the probe 26 and the handpiece body 27 can be reduced in size. At the same time, the device itself can be made simple and inexpensive.
Furthermore, since the number of revolutions in the control unit 28 can be set while visually observing each of the display units 52, 53, 54, and 55, the operator intended by a simple operation according to the probe 26 to be used. The optimal number of revolutions can be set reliably.
Further, when the upper limit value is switched from 6000 to 10,000, the display of the set rotation speed display section 52 blinks, so that it is possible to alert the operator that the high-speed rotation is being set.

(Example 2)
6 (a) and 6 (b) show a second embodiment of the present invention.
6A and 6B, the same components as those shown in FIG. 3 are denoted by the same reference numerals, and the description thereof is omitted.
This embodiment and the first embodiment have the same basic configuration, and are different from the above-described embodiment in the following points. That is, a shift key (changeover switch) 64 having a red portion 56 is provided in the vicinity of the rotation speed increase switch 50. Instead of the long press of the rotation speed increase switch 50 as in the above embodiment, the shift key 64 and the rotation speed are changed. By simultaneously pressing the increase switch 50 (second operation method), the second signal is output from the rotation speed increase switch 50 and the shift key 64, and the upper limit value of the rotation speed is changed.
From the above, it is possible not only to achieve the same effect as in the above embodiment, but also to change the upper limit value more quickly.

(Example 3)
FIGS. 7A and 7B show a third embodiment of the present invention.
In the present embodiment, the control unit 28 includes a cutter display LED 65 indicating that the cutter 26a is mounted, a drill bar display LED 66 indicating that the drill bar 26b is mounted, and the display of the cutter display LED 65 and the drill bar display LED 66. And a blade selection switch (external device) 67 for changing each upper limit value. The LEDs 65 and 66 and the blade selection switch 67 are electrically connected to the control circuit 60, and various controls are performed by the control circuit 60.

  With this configuration, when the blade selection switch 67 is pressed while the drill bar display LED 66 is lit, a signal is output from the blade selection switch 67 as shown in FIG. Is input. Based on this input signal, the upper limit value is changed to 10000 by the control circuit 60 and “10000” is displayed on the upper limit speed display portion 55. At the same time, lighting is switched from the drill bar display LED 66 to the cutter display LED 65. Thereby, the rotation speed for high-speed rotation is set. On the other hand, when the blade selection switch 67 is pressed while the cutter display LED 65 is lit, the upper limit is set by the control circuit 60 based on the input signal from the blade selection switch 67 as shown in FIG. The value is changed to 6000, and “6000” is displayed on the upper limit rotational speed display portion 55.

FIG. 8 is a flowchart showing a series of these processes.
In this embodiment, as shown in FIG. 5 of the first embodiment, instead of determining whether or not the button has been pressed for a long time in Step 2, in Step 2 ′, the blade display switch 67 is pressed to display the cutter. It is determined whether the LED 65 is turned on or the drill bar display LED 66 is turned on. When the cutter display LED 65 is turned on (step 2 ′: cutter ON), the process proceeds to step 3, and when the drill bar display LED 66 is turned on (step 2 ′: burn ON), the process proceeds to step 8. The same processing as in the first embodiment is performed.
As described above, the operator can switch the set rotation speed while checking the cutter display LED 65 and the drill bar display LED 66.

Example 4
FIG. 9 shows a fourth embodiment of the present invention.
In the present embodiment, a blade selection button (external device) 76 is provided on the handpiece body 27 instead of or simultaneously with the blade selection switch 67 of the third embodiment. The blade selection button 76 is provided in a recess 27 a formed in the grip portion 27 b of the handpiece body 27. In this state, the upper surface of the blade selection button 76 is in a state of being submerged in the recess 27a. This is to prevent malfunctions caused by unexpected pressing during treatment.
Then, by pressing the blade selection button 76 in the recess 27a with the fingertip, the upper limit value is changed as in the third embodiment.
As described above, since the handpiece main body 27 can be operated while grasping the handpiece body 27 during the treatment, the number of rotations can be set more easily.

(Example 5)
FIGS. 10A, 10B, and 11 show a fifth embodiment of the present invention.
10 (a), (b) and FIG. 11, the same components as those shown in FIGS. 7 (a), (b) and FIG.
This embodiment and the third embodiment have the same basic configuration, and are different from the above-described embodiment in the following points. That is, the control unit 28 includes a code detector (external device) 70 instead of the blade selection switch 67, and the code detector 70 is connected to the control circuit 60 via the connection cable 71. . Further, the cutter 26a and the drill bar 26b are provided with a cutter code display part 72 and a drill bar code display part 73, respectively.

Under such a configuration, after attaching either the cutter 26a or the drill bar 26b to the handpiece 11, the code detector 70 is applied to the cutter code display part 72 or the drill bar code display part 73. Then, the code is read by the code detector 70 and a corresponding signal is output and input to the control circuit 60. Based on the input signal, the control circuit 60 changes the upper limit value.
As described above, since either of the cutter 26a and the drill bar 26b is attached and can be identified by the code, the upper limit value can be reliably changed without any error.

(Example 6)
FIG. 12 shows a sixth embodiment of the present invention.
In the present embodiment, a microphone (external device) 75 is connected instead of the code detector 70 of the fifth embodiment. The microphone 75 has a voice processing circuit (not shown) incorporated in the control unit 28 shown in FIG. 4 described above. When the name of the probe 26 to be used is input by voice through the microphone 75, the microphone 75 is directed to the control circuit 60. Then, a signal corresponding to the voice is output, and this signal is input to the control circuit 60. Based on this input signal, the upper limit value is changed by the control circuit 60 as described above.
As described above, the upper limit value can be changed more easily and reliably.

  Note that the technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

It is a figure which shows 1st Example of the surgical excision apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that treatment is performed using an arthroscope. It is a schematic block diagram which shows the handpiece of the surgical excision apparatus in the Example. It is a figure which shows the control unit of the surgical resection apparatus in the Example, Comprising: (a) is the state in which the normal upper limit value 6000 was set, (b) is a front view which shows the state from which the upper limit value was changed. . It is a block diagram which shows the control unit of the surgical excision apparatus in the Example. It is a flowchart which shows the process sequence when the upper limit of the surgical excision apparatus in the Example is changed. It is a figure which shows the principal part of 2nd Example of the surgical excision apparatus which concerns on this invention, Comprising: (a) is the state in which the normal upper limit value 6000 was set, (b) is the state in which the upper limit value was changed FIG. It is a figure which shows the principal part of the 3rd Example of the surgical excision apparatus which concerns on this invention, Comprising: (a) is the state in which the normal upper limit value 6000 was set, (b) is the state in which the upper limit value was changed FIG. It is a flowchart which shows the process sequence when the upper limit of the surgical excision apparatus in the 3rd Example is changed. It is explanatory drawing which shows the principal part of the 4th Example of the surgical excision apparatus which concerns on this invention. It is a figure which shows the principal part of 5th Example of the surgical excision apparatus which concerns on this invention, Comprising: (a) is the state in which the normal upper limit value 6000 was set, (b) is the state in which the upper limit value was changed FIG. It is a schematic block diagram which shows the handpiece in the same 5th Example. It is a figure which shows the principal part of the 6th Example of the surgical excision apparatus which concerns on this invention, Comprising: (a) is the state in which the normal upper limit value 6000 was set, (b) is the state in which the upper limit value was changed FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surgical excision apparatus 11 Handpiece 26 Probe 28 Control unit (supply means)
30 Blade 44 Power source 50 Speed increase switch (operating means, increase switch)
51 Rotation speed lowering switch (operating means)
52 Setting rotation speed display section 55 Upper limit rotation speed display section 60 Control circuit (rotation speed setting means, variable range changing means)
64 Shift key (switching key)
67 Blade selection switch (external device)
70 Code detector (external device)
75 Microphone (external device)
76 Blade selection button (external device)

Claims (6)

A probe capable of excising biological tissue with a blade provided at the tip;
A handpiece having a power source for removably attaching the probe and rotationally driving the blade;
An operating means for operating an increase / decrease in the number of rotations of the blade rotated by the power source;
A rotation speed setting means capable of setting the rotation speed of the blade based on a first operation signal output from the operation means by a predetermined first operation method;
Rotational speed variable that can be variably set by the rotational speed setting means based on a second operation signal output from the operating means by a second operating method different from the first operating method or an input signal from an external device. Variable range changing means for changing the range;
Supply means for supplying power to the power source based on a setting result set by the rotation speed setting means within a rotation speed variable range changeable by the variable range changing means;
Surgical excision apparatus characterized by comprising.   The surgical excision apparatus according to claim 1, further comprising an upper limit rotational speed display unit for displaying an upper limit value of the rotational speed variable range changed by the variable range changing means.   The surgical excision apparatus according to claim 1 or 2, further comprising a set rotation speed display unit that displays the set rotation speed set by the rotation speed setting means. The operation means includes at least an increase switch for increasing the rotation speed of the blade by a predetermined amount,
The rotation speed setting means performs the increase setting of the rotation speed by the first operation method based on a first operation time of the increase switch,
2. The variable range changing means changes the rotation speed variable range by the second operation method of the increase switch based on a second operation time longer than the first operation time. The surgical excision device according to any one of 1 to 3. The operation means includes at least an increase switch for increasing the number of rotations of the blade by a predetermined amount, and a change-over switch provided together with the increase switch,
The rotation speed setting means performs the increase setting of the rotation speed by the first operation method using only the increase switch,
4. The variable range changing unit according to claim 1, wherein the rotation speed variable range is changed by the second operation method in which the increase switch and the changeover switch are combined. 5. A surgical resection device as described. 6. The display form of the set rotational speed display section is changed according to the state of the rotational speed variable range changed by the variable range changing means. Surgical excision device.

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