Tissue removal device

Abstract

A tissue removal device comprises a housing, a blade tube, a driving unit, a sleeve and a switching unit. The blade tube comprises a blade end. The driving unit is used to drive the blade tube to rotate. The sleeve is sleeved on the blade tube and has a limit block. The switching unit is sleeved on the sleeve and has two safety grooves, a first groove and a second groove. In a safety mode, one of the safety grooves is engaged with the limit block and the blade end is located in the sleeve. In a peeling mode, the first groove is engaged with the limit block and the blade end is partially exposed from the sleeve. In a cutting mode, the second groove is engaged with the limit block and the blade end is completely exposed from the sleeve. By each of the safety grooves being located between the first groove and the second groove, when switching modes, the mode will be switched to the safety mode first before switching to other modes, which is safer to use.

Description

Technical Field

[0001] The present invention relates to a surgical instrument, and more particularly to a tissue removal device. Background Art

[0002] See also Figure 1 and Figure 2 A conventional tissue cutter 1 comprises a cutting tube 11 around a rotation axis R, an operating body 12 for driving the cutting tube 11 to rotate around the rotation axis R, an outer tube 13 disposed outside the cutting tube 11, and a switching group 14 for driving the outer tube 13 to move forward and backward relative to the cutting tube 11. The cutting tube 11 comprises a cutting end 111 away from the operating body 12, and the cutting tube 11 is used to extend into the human body and to cut tissue such as a tumor. By operating the switching group 14, the outer tube 13 can selectively shield the cutting end 111 of the cutting tube 11 in three different modes:

[0003] 1. Safe mode: Figure 2 As shown in (a), the outer tube 13 completely covers the cutting end 111 of the cutting tube 11. At this time, the tissue cutter 1 is not in use.

[0004] 2. Peeling mode: Figure 2 As shown in (b), the outer tube 13 partially covers the cutting end 111 of the cutting tube 11. At this time, the cutting end 111 of the cutting tube 11 is used to cut the surface tissue.

[0005] 3. Resection mode: Figure 2 As shown in (c), the cutting end 111 of the cutting tube 11 is completely exposed outside the outer tube 13. At this time, the cutting tube 11 can be used to remove deeper tissues.

[0006] Although the user can switch modes according to needs, the switching order of the above modes is safety mode, peeling mode and excision mode. When switching from safety mode to excision mode, it is necessary to switch to peeling mode before reaching excision mode, and when switching from excision mode to safety mode, it is also necessary to switch to peeling mode before reaching safety mode. Since the cutting tube 11 first contacts the part of the human body to be excised in safety mode and then switches to peeling mode or excision mode, the surface of the tissue may be accidentally cut during the switching process, thereby destroying the integrity of the tissue, or even injuring parts outside the tissue, and the safety of use needs to be improved. Summary of the invention

[0007] Therefore, an object of the present invention is to provide a tissue removal device that can improve the safety of use.

[0008] Therefore, the tissue resection device of the present invention comprises a housing, a blade tube, a driving unit, a sleeve, and a switching unit. The housing defines a chamber. The chamber has a front opening and a rear opening arranged in opposite directions along an axis. The blade tube can be rotatably arranged in the chamber of the housing with the axis as the center. The blade tube includes a blade end extending from the front opening. The driving unit is used to drive the blade tube to rotate. The sleeve is movably sleeved on the blade tube along the direction of the axis. The sleeve has a front end and a rear end arranged in opposite directions along the axis, and a limit block adjacent to the rear end and formed on its outer surface, and the front end is used to cover the blade end. The switching unit comprises a switching member, a rotating head, and an elastic member. The switching member is rotatably sleeved on the rear end of the sleeve with the axis as the center, and the switching member has two safety grooves, a first groove and a second groove, which are recessed toward the chamber of the housing and arranged at intervals along a circumferential direction. Each of the safety grooves is located between the first groove and the second groove. The rotating head is connected to the switching member and is rotatably disposed on the housing base and is used to drive the switching member to rotate between a safety mode, a peeling mode and a cutting mode. In the safety mode, one of the safety grooves is engaged with the limit block, and the blade end is located in the sleeve. In the peeling mode, the first groove is engaged with the limit block, and the blade end is partially exposed from the sleeve. In the cutting mode, the second groove is engaged with the limit block, and the blade end is completely exposed from the sleeve. The elastic member is sleeved outside the sleeve and can be compressibly elastically pressed between the sleeve and the rotating head. The elastic member has a potential energy that constantly moves the sleeve toward the rear opening.

[0009] The effect of the present invention is that each of the safety grooves of the switching member is located between the first groove and the second groove, so that when the rotating head drives the switching member to switch between the safety mode, the peeling mode and the cutting mode, it will first switch to the safety mode before switching to the peeling mode or the cutting mode, which can avoid human harm when switching modes and has higher safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings, in which:

[0011] Figure 1 is a side view illustrating an existing tissue cutter;

[0012] Figure 2 (a) to Figure 2 (c) is an incomplete side view, respectively. Figure 1 Three modes of tissue cutters in;

[0013] Figure 3 is a perspective view illustrating an embodiment of the tissue removal device of the present invention;

[0014] Figure 4 yes Figure 3 An exploded perspective view of the illustrated embodiment;

[0015] Figure 5 It is a three-dimensional exploded diagram, explaining Figure 3 A driving unit of the illustrated embodiment is used to drive a blade tube to rotate;

[0016] Figure 6 This is an incomplete three-dimensional exploded diagram, Figure 3 A switching unit of the embodiment shown is sleeved in a sleeve and disposed on a housing;

[0017] Figure 7 It is a three-dimensional exploded diagram, explaining Figure 3 A switching unit of the embodiment shown is sleeved in a sleeve;

[0018] Figure 8 yes Figure 3 A front view of a switching member of the illustrated embodiment;

[0019] Fig. 9 It is along Figure 8 a sectional view taken along line IX-IX in FIG.

[0020] Fig.10 It is along Figure 8 a sectional view taken along line X-X in FIG.

[0021] Fig.11 It is an incomplete cross-sectional view, showing that all the replacement parts of the switching unit are in a safe mode;

[0022] Fig.12 It is a similar Fig.11 , illustrating the switching member in a peeling mode;

[0023] Fig.13 It is a similar Fig.11 , illustrating the switching member in a cut-off mode;

[0024] Fig.14 It is a three-dimensional exploded diagram, explaining Figure 3 A guide needle of the illustrated embodiment is disposed through the housing seat;

[0025] Fig.15 yes Fig.14 A three-dimensional composite picture of

[0026] Fig.16 It is a three-dimensional exploded diagram, explaining Figure 3 An adapter of the illustrated embodiment is disposed on the housing seat;

[0027] Fig.17 yes Fig.16 A cross-sectional composite diagram.

[0028] Explanation of symbols in the accompanying drawings:

[0029] 2: Shell seat; 21: Seat body; 211: Chamber; 212: Front opening; 213: Rear opening; 214: Flange; 22: Handheld part; 23: Baffle; 231: Perforation; 232: Limiting groove; 24: Shell; 3: Blade tube; 31: Blade end; 4: Drive unit; 41: Bevel gear; 42: Drive gear; 43: Drive; 44: Button; 45: Battery; 46: Relay; 5: Casing; 51: Front end; 511: Baffle edge; 52: Rear end; 53: Pipe fitting; 54: Limiting member; 541: Limiting block; 542: Limiting strip; 6: Switching unit; 61: Switching member; 611: Base wall; 6 12: peripheral wall; 613: block; 614: safety groove; 615: first groove; 616: second groove; 617: first inclined surface; 618: second inclined surface; 62: rotating head; 621: connecting ring; 622: operating ring; 623: groove; 624: slot; 625: bump; 63: elastic member; 7: guide needle; 71: guide rod; 711: tip; 72: connector; 8: check valve; 9: adapter; 91: tube; 92: head; 93: channel; 931: large opening; 932: small opening; L: axis; X: front-to-back direction; Y: left-right direction; Z: up-down direction; C: circumferential direction. DETAILED DESCRIPTION

[0030] Before the present invention is described in detail, it should be noted that in the following description, the front-to-back direction X, the left-to-right direction Y, and the up-to-down direction Z are based on the user's operation. Figure 3 The direction viewed when viewing the present invention shall prevail.

[0031] See also Figures 3 to 6 An embodiment of the tissue removal device of the present invention comprises a housing 2, a blade tube 3, a driving unit 4, a sleeve 5, and a switching unit 6. The tissue (not shown) is a tumor or an organ.

[0032] The housing 2 includes a main body 21, a handle 22, and a baffle 23. The main body 21 surrounds an axis L and defines a chamber 211. The chamber 211 has a front opening 212 and a rear opening 213 that are arranged in opposite directions along the axis L and are arranged in a front-to-back reverse direction. The main body 21 has a flange 214 surrounding the front opening 212. The handle 22 extends downward from the main body 21 and is for handholding. The baffle 23 is adjacent to the front opening 212 and has a through hole 231, and a plurality of spaced limiting grooves 232 that extend radially outward from the through hole 231. In the embodiment, the housing 2 is composed of two left and right facing shells 24, which is convenient for assembly, but in other variations, the two shells 24 can also be integrally formed.

[0033] The blade tube 3 can be rotatably disposed in the housing chamber 211 of the housing base 2 around the axis L. The blade tube 3 includes a blade end 31. The blade end 31 passes through the through hole 231 of the baffle 23 and extends out from the front opening 212.

[0034] The driving unit 4 is disposed in the handle portion 22 of the housing 2 and is used to drive the blade tube 3 to rotate. The driving unit 4 includes a bevel gear 41 disposed on the blade tube 3, a driving gear 42 used to drive the bevel gear 41 and link the blade tube 3 to rotate, a driver 43 used to drive the driving gear 42, a button 44 used to start the driver 43, a battery 45 for power supply, and a relay 46 electrically connected to the driver 43 and the battery 45. When the voltage output by the battery 45 is less than 9 volts, the relay 46 will command the driver 43 to stop operating instantly.

[0035] The sleeve 5 is sleeved on the blade tube 3 so as to be movable forward and backward along the direction of the axis L. The sleeve 5 has a front end 51 and a rear end 52 arranged in opposite directions along the axis L. The front end 51 is used to shield the blade end 31 and has a blocking edge 511 protruding forward. The sleeve 5 includes a pipe 53 and a stopper 54. The stopper 54 is arranged at the rear side of the pipe 53 and has an outer diameter greater than the outer diameter of the pipe 53. The stopper 54 has a stopper block 541 adjacent to the rear end 52 and formed on its outer surface, and a plurality of stopper bars 542 extending in the direction of the rear opening 213 and respectively used to be clamped in the plurality of stopper grooves 232 of the baffle 23.

[0036] In the present embodiment, the tube member 53 and the stop member 54 are manufactured separately and then assembled together. However, in other variations, the tube member 53 and the stop member 54 may also be integrally formed.

[0037] See also Figure 6 and Figure 7The switching unit 6 includes a switching member 61 , a rotating head 62 , and an elastic member 63 .

[0038] See also Figure 8 , Fig. 9 and Fig.10 The switching member 61 is rotatably sleeved on the rear end 52 of the sleeve 5 with the axis L as the center. The switching member 61 has an annular base wall 611, a peripheral wall 612 extending forward from the base wall 611 along the direction of the axis L, and a plurality of blocks 613 extending radially outward from the base wall 611 and arranged at intervals. The peripheral wall 612 is formed with two safety grooves 614 recessed toward the chamber 211 of the housing seat 2 and arranged at intervals along a circumferential direction C, a first groove 615 and a second groove 616, two first inclined surfaces 617 respectively connecting the two safety grooves 614 and the first groove 615, and two second inclined surfaces 618 respectively connecting the two safety grooves 614 and the second groove 616. Each of the safety grooves 614 is located between the first groove 615 and the second groove 616. The two safety grooves 614 are spaced apart from each other in the radial direction, and the first groove 615 and the second groove 616 are spaced apart from each other in the radial direction.

[0039] See also Fig.11 , Fig.12 and Fig.13 The distances between the second groove 616, the first groove 615 and each of the safety grooves 614 of the switching member 61 and the blade end 31 are d2, d1, and ds, respectively, and satisfy d2>d1>ds. The angle formed by the two first inclined surfaces 617 is greater than the angle formed by the two second inclined surfaces 618.

[0040] The rotating head 62 is connected to the switching member 61 and is rotatably disposed on the housing 2. The rotating head 62 has a connecting ring portion 621 connected to the housing 2, and an operating ring portion 622 extending forward from the connecting ring portion 621 and having a gradually decreasing diameter. The connecting ring portion 621 has a groove 623 formed on its outer surface and extending along the circumferential direction C and engaging with the flange 214 of the housing 2, and a plurality of slots 624 formed on the inner surface and respectively engaged with the plurality of blocks 613 of the switching member 61. The operating ring portion 622 has a plurality of protrusions 625 formed at intervals on its outer surface (see Figure 7 ), the plurality of protrusions 625 are used to increase the friction force when the rotating head 62 is rotated by hand.

[0041] The elastic member 63 is elastically pressed between the rotating head 62 and the stopper 54 of the sleeve 5. The elastic member 63 has a potential energy that constantly moves the sleeve 5 toward the rear opening 213. In this embodiment, the elastic member 63 is a spring.

[0042] The rotating head 62 is used to drive the switch 61 in a safe mode (such as Fig.11 ), a peeling mode (such as Fig.12 ) and a resection mode (such as Fig.13 ).

[0043] See also Fig.11 In the safety mode, one of the safety grooves 614 of the switching member 61 is engaged with the limiting block 541 of the sleeve 5 , and the blade end 31 of the blade tube 3 is located in the sleeve 5 .

[0044] See also Fig.12 In the peeling mode, the first groove 615 of the switching member 61 is engaged with the limiting block 541 of the sleeve 5 , and the blade end 31 of the blade tube 3 is partially exposed from the sleeve 5 .

[0045] See also Fig.13 In the cutting mode, the second groove 616 of the switching member 61 is engaged with the limiting block 541 of the sleeve 5 , and the blade end 31 of the blade tube 3 is completely exposed from the sleeve 5 .

[0046] Because each of the safety slots 614 of the switch member 61 is located between the first slot 615 and the second slot 616 , when the rotating head 62 drives the switch member 61 to switch between the modes, it will first switch to the safety mode before switching to the peeling mode or the cutting mode.

[0047] See also Fig.14 and Fig.15 The tissue removal device further comprises a guide needle 7. The guide needle 7 passes through the blade tube 3 along the axis L from the rear opening 213 of the housing 2. The guide needle 7 comprises a guide rod 71 extending along the axis L and passing through the blade tube 3, and a connector 72 connected to the guide rod 71 and exposed to the housing 2. The guide rod 71 has a tip 711 opposite to the connector 72 and passing through the front end 51 of the sleeve 5.

[0048] See also Figure 5 , Fig.16 and Fig.17 The tissue removal device further comprises a check valve 8 and an adapter 9 detachably arranged on the housing 2. The check valve 8 is arranged in the housing chamber 211 of the housing 2 and is located between the blade tube 3 and the rear opening 213. The adapter 9 comprises a tube portion 91 extending from the rear opening 213 into the housing chamber 211, a head portion 92 connected to the tube portion 91 and exposed to the housing 2, and a channel 93 penetrating the tube portion 91 and the head portion 92 and used to communicate with the blade tube 3. The channel 93 has a large opening 931 and a small opening 932 arranged in opposite directions along the axis L. The small opening 932 is adjacent to the blade tube 3, and the aperture of the large opening 931 is larger than the aperture of the small opening 932.

[0049] The steps of using this embodiment to remove the tissue are described as follows:

[0050] First, the rotating head 62 is rotated to drive the switching member 61 to switch to the safety mode, and the guide needle 7 is inserted into the blade tube 3 from the rear opening 213. Then the guide needle 7, the sleeve 5 and the blade tube 3 are inserted into the human body. The tip 711 of the guide needle 7 can help the user to pre-position the blade tube 3 at the part to be removed. After the blade tube 3 is positioned, the guide needle 7 is removed. At this time, the check valve 8 can prevent the gas in the human body from leaking out from the rear opening 213, and can maintain the space in the human body and maintain the airtightness of the chamber 211, so as to facilitate subsequent operations. Finally, the rotating head 62 is rotated to drive the switching member 61 to switch to the peeling mode or the cutting mode, and then the button 44 of the drive unit 4 is pressed to rotate the blade tube 3 and perform peeling or cutting operations on the tissue. By virtue of each of the safety slots 614 of the switching member 61 being located between the first slot 615 and the second slot 616, when the rotating head 62 drives the switching member 61 to switch between the modes, it will first switch to the safety mode before switching to the peeling mode or the cutting mode, which can avoid causing harm to the human body when switching modes, and the safety of use is higher. It is worth noting that when a more delicate operation is required, the adapter 9 can be set on the shell 2, and a surgical instrument (not shown) can be inserted into and out of the blade tube 3 through the large opening 931 of the passage 93 before the operation is performed. The large opening 931 facilitates the surgical instrument to be inserted into the blade tube 3. When the surgical instrument is used for surgery, the small opening 932 can reduce the leakage of gas in the human body.

[0051] In the present invention, each of the safety slots 614 of the switch member 61 is located between the first slot 615 and the second slot 616, so that when the rotating head 62 drives the switch member 61 to switch between the modes, it will first switch to the safety mode before switching to the peeling mode or the cutting mode, thereby avoiding human body injuries when switching modes, and the use safety is higher. Therefore, the purpose of the present invention can be achieved.

[0052] The above descriptions are merely embodiments of the present invention and should not be used to limit the scope of implementation of the present invention. All simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the patent specification are still within the scope of the patent of the present invention.

Claims

1. A tissue removal device, characterized in that: Include: A housing seat, surrounding and defining a chamber, the chamber having a front opening and a rear opening arranged in opposite directions along an axis; A blade tube, rotatably disposed in the housing chamber of the housing seat with the axis as the center, the blade tube comprising a blade end extending from the front opening; an adapter detachably disposed on the housing seat, the adapter comprising a tube portion extending into the housing chamber, a head portion connected to the tube portion and exposed to the housing seat, and a passage penetrating the tube portion and the head portion and used to communicate with the blade tube, the passage having a large opening and a small opening disposed in opposite directions along the axis, the small opening being adjacent to the blade tube, and the aperture of the large opening being larger than the aperture of the small opening; A check valve is disposed in the housing of the housing seat and is located between the blade tube and the rear opening and adjacent to the rear opening, and the front end of the tube portion of the adapter abuts against the check valve to prevent gas in the human body from leaking out through the rear opening; a driving unit, used to drive the blade tube to rotate; a sleeve movably sleeved on the blade tube along the axis, the sleeve having a front end and a rear end disposed in opposite directions along the axis, and a stopper adjacent to the rear end and formed on its outer surface, the front end being used to shield the blade end; and A switching unit includes a switching member, a rotating head and an elastic member. The switching member is rotatably sleeved on the rear end of the sleeve with the axis as the center. The switching member has two safety grooves, a first groove and a second groove, which are recessed toward the housing and spaced apart along a circumferential direction. Each of the safety grooves is located between the first groove and the second groove. The rotating head is connected to the switching member and is rotatably arranged on the housing and is used to drive the switching member between a safety mode, a peeling mode and a cutting mode. Rotate, in the safety mode, one of the safety grooves is engaged with the limit block, and the blade end is located in the sleeve, in the peeling mode, the first groove is engaged with the limit block, and the blade end is partially exposed from the sleeve, in the cutting mode, the second groove is engaged with the limit block, and the blade end is completely exposed from the sleeve, the elastic member is sleeved outside the sleeve and can be compressed to elastically press between the sleeve and the rotating head, and the elastic member has a potential energy that constantly moves the sleeve toward the rear opening.

2. The tissue resection device according to claim 1, characterized in that: The sleeve comprises a pipe and a stopper which is arranged at the rear side of the pipe and has an outer diameter larger than that of the pipe. The stopper has the stopper block, and the elastic member is elastically pressed between the rotating head and the stopper.

3. The tissue resection device according to claim 2, characterized in that: The shell seat includes a baffle plate adjacent to the front opening, the baffle plate has a through hole for the blade tube to pass through, and a plurality of spaced-apart limiting grooves extending radially outward from the through hole. The limiting member of the sleeve also has a plurality of limiting strips extending toward the rear opening and respectively used to be clamped in the plurality of limiting grooves.

4. The tissue resection device according to claim 1, characterized in that: The shell seat comprises a seat body surrounding the axis, the seat body has the accommodation chamber, the seat body also has a flange surrounding the front opening, and the rotating head has a groove extending along the circumferential direction and engaged with the flange.

5. The tissue resection device according to claim 1, characterized in that: The switching member has a plurality of clamping blocks extending radially and arranged at intervals, and the rotating head has a plurality of clamping grooves for clamping the plurality of clamping blocks respectively.

6. The tissue resection device according to claim 1, characterized in that: The two safety grooves are spaced apart from each other in the radial direction, and the first groove and the second groove are spaced apart from each other in the radial direction.

7. The tissue resection device according to claim 1, characterized in that: The switching member has an annular base wall and a peripheral wall extending from the base wall along the direction of the axis, the peripheral wall is formed with the two safety grooves, the first groove, the second groove, two first inclined surfaces respectively connecting the two safety grooves and the first groove, and two second inclined surfaces respectively connecting the two safety grooves and the second groove, and the angle formed by the two first inclined surfaces is greater than the angle formed by the two second inclined surfaces.

8. The tissue resection device according to claim 1, characterized in that: The distances between the second groove, the first groove and each of the safety grooves and the blade end are d2, d1, and ds, respectively, and d2>d1>ds is satisfied.

9. The tissue resection device according to claim 1, characterized in that: It also includes a guide needle that penetrates into the blade tube along the axis from the rear opening of the shell seat. The guide needle includes a guide rod that extends along the axis and penetrates into the blade tube, and a connector that is connected to the guide rod and exposed to the shell seat. The guide rod has a tip that is opposite to the connector and penetrates the front end of the sleeve.

10. The tissue resection device according to claim 1, characterized in that: The driving unit also includes a bevel gear arranged on the blade tube, a driving gear used to drive the bevel gear to link the blade tube to rotate, a driver used to drive the driving gear, and a button used to start the driver.

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