ES2920748B2 - Surgical device for cutting tissue in a patient's body - Google Patents

Description

DESCRIPTION

Surgical device for cutting tissue in a patient's body

The disclosure relates to a surgical device for surgically cutting tissue in a patient's body.

An existing surgical device includes a cutting tube rotatable about an axial line, an operating body connected to and driving the cutting tube to rotate, an outer tube movably jacketed over the cutting tube, and an assembly switching mechanism that drives the movement of the outer tube with respect to the cutting tube. The cutting tube has a cutting end distal to the operating body. The cutting tube is capable of extending into a patient's body to cut tissues from the patient or tumors from the patient. The switching assembly controls the outer tube to move to a selected one of a safe mode position, a peeling mode position and a cutting mode position to protect the tube from cutting.

1. In the safe mode position, the outer tube entirely covers the cutting tube, and the surgical device is not in use.

2. In the peeling mode position, the outer tube partially covers the cutting end of the cutting tube so that the cutting end can peel a tissue surface.

3. In cutting mode, the cutting end of the cutting tube is entirely exposed to the outer tube so that the cutting tube can remove deeper tissue.

Although safe, peel and cut mode are selectable based on usage requirements, safe, peel and cut mode can only be switched sequentially in that order. In particular, to switch the safe mode to the cutting mode, the safe mode has to first be switched to the peeling mode before being switched to the cutting mode. When the cutting mode is to be switched to safe mode, the cutting mode has to be switched to peeling mode before being switched to safe mode. During surgical procedures, the outer tube is first placed in contact with the patient's tissue in safe mode, and then switched to peeling or cutting mode. As the outer tube is unable to be switched directly from cutting mode to safe mode or vice versa, it is possible that unintended patient tissue may be injured or miscut during surgery.

D1 (WO2014083576) discloses a surgical device for use in minimally invasive laparoscopic surgical procedures to percutaneously mutilate and reduce tissue. The device consists of an inner hollow elongated tube with a sharp-edged cutting member located at its distal end. This tube is positioned concentrically within the lumen of an outer hollow elongated tube that features a uniquely designed cutting member shield design at the distal end of the outer elongated hollow tube. The shield of the cutting member will serve to act as an effective anti-mutilating element. The cutting element guard can be activated at least by a dedicated bidirectional rotary movement of the external rotary knob. The rotary knob is designed to have at least bi-directional rotary motion. The cutting member guard can be activated by dedicated movement of the external rotating knob in multiple positions. Turning the knob on multiple sides allows the clinician to have convenient control over the exposure of the sharp-edged cutting element during the tissue excision procedure. The device helps the surgeon have easy manipulation and limits accidental damage to the tissue by the sharp-edged cutting element during the procedure.

D2 (US2008039884) discloses a surgical morcellator with a detachable handle that includes a trocar body portion and a handle portion removably mounted on the trocar body portion. The body part of the trocar is relatively light and can be used separately from the handle part with other laparoscopic instruments while no morcellation is required during the surgical procedure.

D3 (2011264129) discloses a surgical instrument for fragmenting tissue within a body cavity of a patient comprising a morcellator in combination with first and second tissue extraction devices and an insert. The morcellator comprises a handle portion having a lumen passing through it, and an opening communicating with the proximal end of the lumen. A tube extends from the handle portion and has a tissue cutting device located at the distal end of the tube. The handle includes first and second valves associated with the lumen of the handle portion, and the first and second tissue traction devices have shafts of a first and second diameter respectively. The insert comprises a stem and a body portion, the stem being received in the opening to form a substantially gas tight seal in combination with the first valve. The body portion remains outside the opening and includes a third valve, the third valve being such that it forms a substantially gas-tight seal around the axis of the second tissue pulling device when the second tissue pulling device is inserted into the insert lumen.

Therefore, an object of the disclosure is to provide a surgical device with greater safety in use, by reducing gas leakage from a patient's body during surgery, thereby facilitating subsequent operations.

According to the disclosure, a surgical device includes a housing unit, a cutting tube, a sheath unit, and a switching unit.

The housing unit has an accommodation space having a front housing opening and a rear housing opening opposite the front housing opening along an axial line of the accommodation space.

The cutting tube is arranged in the accommodation and rotating space around the axial line. The cutting tube includes a cutting end and protrudes forwardly from the front housing opening.

The sheath unit is sleeved over the cutting tube and is movable relative to the cutting tube along the axial line. The sheath unit includes a sheath front end to cover the cutting end, a sheath rear end opposite the sheath front end along the axial line, and a positioning block projecting from the sheath rear end.

The switching unit includes a switching member, a rotating head, and a resilient member. The switching member is sleeved on top of and rotatable about the rear end of the sleeve. The switching member has a cam face to cam the positioning block to move the sheath unit forward or backward relative to the cutting tube. The cam face has two safety recesses, a first recess and a second recess. The first and second safety recesses are spaced angularly from each other. Each of the safety recesses is arranged between the first and second recesses. The rotating head is connected to the switching member and rotatably extends in the housing unit to rotate and switch the switching member between a safe mode, a peeling mode and a cutting mode. The resilient member is sleeved over the casing unit and is compressibly disposed between the casing unit and the rotating head to force the casing unit to move toward the rear casing opening.

When the switching member is switched to safe mode, one of the safety recesses engages with the positioning block, and the cutting end is not exposed from the sheath unit.

When the switching member is switched to the peeling mode, the first recess engages with the positioning block, and the cutting end is partially exposed from the sheath unit.

When the switching member is switched to the cutting mode, the second recess engages with the positioning block, and the cutting end is entirely exposed from the sheath unit.

The surgical device described in D1 (WO2014083576 A2) does not describe a check valve and an adapter unit, nor does it suggest that a front end of the tubular member of the adapter unit abuts against the check valve as described in one embodiment of the surgical device .

The surgical device described in D2 (US20080039884 A1) also does not disclose that the surgical device includes an adapter unit removably connected to the housing unit as described in one embodiment of the surgical device.

The surgical device described in D3 (US2011/0264129 A1) describes a surgical device that includes a second valve and an insert where the surgical device shows a predisposition to move between the insert and the second valve and, therefore, produces damage to the second valve.

Therefore, the surgical device provides an air-tight effect within the surgical intervention space of the patient's body, facilitating subsequent operations within the human body.

In one embodiment, the check valve of the surgical device is disposed within the accommodation space between the cutting tube and the rear housing opening. The check valve is adapted to prevent gas from the patient's body from being lost through the rear opening of the housing during surgery.

Other features and advantages of the disclosure will become apparent from the following detailed description of the embodiment with reference to the accompanying drawings, of which:

Figure 1 is a perspective view illustrating a surgical device according to one embodiment of the disclosure;

Figure 2 is an exploded perspective view of the embodiment illustrating the surgical device;

Figure 3 is an exploded perspective view of the embodiment illustrating a cutting tube, a drive unit, and a check valve of the surgical device;

Figure 4 is an exploded perspective view of the embodiment illustrating a housing unit, a sleeve unit and a switching unit of the surgical device;

Figure 5 is a perspective view of the embodiment illustrating the sheath unit and the switching unit of the surgical device;

Figure 6 is a front view of the embodiment illustrating a switching member of the surgical device;

Figure 7 is a sectional view taken along line IX-IX of Figure 6;

Figure 8 is a sectional view taken along line X-X of Figure 6;

Figure 9 is a fragmentary sectional view illustrating the switching member rotated in a safety mode;

Figure 10 is a fragmentary sectional view illustrating the switching member rotated in a stripping mode;

Figure 11 is a fragmentary sectional view illustrating the switching member rotated in a cutting mode;

Figure 12 is an exploded perspective view of the embodiment illustrating a guide needle assembly to be connected to the surgical device;

Figure 13 is a perspective view of the embodiment illustrating the guide needle assembly connected to the surgical device;

Figure 14 is an exploded perspective view of the embodiment illustrating an adapter unit to be connected to the surgical device; and

Figure 15 is an enlarged fragmentary sectional view illustrating the adapter unit connected to the surgical device.

Figures 1 to 4 illustrate a surgical device according to one embodiment of the disclosure. The surgical device includes a housing unit 2, a cutting tube 3, a drive unit 4, a sheath unit 5, and a switching unit 6.

The housing unit 2 includes a main body 21, a hand holding part 22 connected to the main body 21, and a fence 23. The main body 21 surrounds an accommodation space 211 having a front housing opening 212 and an opening housing rear 213 opposite the front housing opening 212 along an axial line (L) of the accommodation space 211. An annular rim 214 protrudes from an inner surface of the main body 21 and surrounds the front housing opening 212. The fence plate 23 is disposed proximal to the front housing opening 212 and has a through hole 231, and a plurality of spaced limiting grooves 232 arranged around the through hole 231. Each limiting groove 232 extends radially outwardly from the through hole 231. In this embodiment, the housing unit 2 is assembled by two housing parts 24 although it is not limited to this.

The cutting tube 3 is arranged in the accommodation space 211 and is rotatable around the axial line (L). The cutting tube 3 includes a cutting end 31 and protrudes forward from the front casing opening 212 through the through hole 231 of the fence plate 23.

The drive unit 4 is arranged in the hand holding portion 22 to drive the rotation of the cutting tube 3. The driving unit 4 includes a bevel gear 41 jacketed on the cutting tube 3, a drive gear 42 meshed with the bevel gear 41 to rotate the cutting tube 3 through the bevel gear 41, a drive member 43 to drive the rotation of the drive gear 42, a push button 44 to activate the drive member 43, a battery 45 electrically connected to the drive member 43, and a relay 46 electrically coupled to the drive member 43 and the battery 45. When an output voltage of the battery 45 is less than 9 volts, the drive member 43 is instantly inactivated by the relay 46.

The sheath unit 5 is sleeved over the cutting tube 3 and is movable relative to the cutting tube 3 along the axial line (L). The sheath unit 5 includes a sheath front end 51 to cover the cutting end 31, a sheath rear end 52 opposite the sheath front end 51 along the axial line (L), a tube member 53, a positioning member 54, and a positioning block 541 projecting from the rear end of sleeve 52. The positioning member 54 is disposed at the rear end of sleeve 52, and the positioning block 541 is formed on the positioning member 54. The tube member 53 connects the positioning member 54 and extends therefrom to the front end of sleeve 51 and has a locking lip 511 at the front end of sleeve 51. An outer diameter of the positioning member 54 is larger than an outer diameter of the tube member 53. The positioning member 54 has a plurality of limiting ribs 542 that extend towards the rear housing opening 213 and respectively engageable with the limiting grooves 232 of the fence plate 23.

In this embodiment, the cutting tube 53 and the positioning member 54 are manufactured separately and then assembled together. However, in other embodiments, the cutting tube 53 and the positioning member 54 may also be formed integrally with each other.

Referring to Figures 4 and 5, the switching unit 6 includes a switching member 61, a rotating head 62, and a resilient member 63.

Referring to Figures 6 to 8, in combination with Figure 4, the switching member 61 is jacketed on and rotatable about the rear end of sleeve 52 of the sleeve unit 5. The switching member 61 has a plate base 611 looped around the rear end of sleeve 52, a surrounding wall 612 extending forwardly from the base plate 611, and a plurality of angularly spaced engagement tabs 613 extending radially outward from the base plate 611 The surrounding wall 612 has a front end formed with a cam face 612a opposite the base plate 611 and extending around the rear end of sleeve 52. The cam face 612a has two security recesses 614, a first recess. 615 and a second recess 616. The first and second safety recesses 614, 615, 616 are spaced angularly from each other. The surrounding wall 611 further has two first inclined edges 617 and two second inclined edges 618. Each first inclined edge 617 connects between the first recess 615 and one of the safety recesses 614. The first inclined edges 617 converge towards the first recess 615. from the safety recesses 614. Each second inclined edge 618 connects between the second recess 616 and one of the safety recesses 614. The second inclined edges 618 converge towards the second recess 616 from the safety recesses 614. Each safety recess 614 is disposed between the first and second recesses 615, 616. The safety recesses 614 are diametrically opposed to each other. The first and second recesses 615, 616 are diametrically opposed to each other.

Referring to Figures 9 to 11, a distance (d2) between the cutting end 31 and the second recess 616 is greater than a distance (d1) between the cutting end 31 and the first recess 615. The distance (d1) between the cutting end 31 and the first recess 615 is greater than a distance (ds) between the cutting end 31 and each of the safety recesses 614. An angle (01) formed between the first inclined edges 617 is greater than an angle (02) formed between the second inclined edges 618.

The rotating head 62 is connected to the switching member 61 and rotatably extends in the housing unit 2. The rotating head 62 has a sleeve part 621 received in the housing unit 2, and an operating part 622 tapering forward from the sleeve portion 621 opposite the housing unit 2. The sleeve portion 621 has an annular groove 623 formed circumferentially therein and engaged with the annular flange 214, and a plurality of engagement grooves 624 respectively engaged with the flanges of coupling 613. The operating part 622 is formed with a plurality of protrusions 625 (see Figure 5) angularly spaced from each other. The protrusions 625 are used to increase friction when the rotary head 62 is rotated by hand.

The resilient member 63 sleeves over the casing unit 5 and resiliently abuts between the rotating head 62 and the positioning member 54 to force the casing unit 5 to move toward the rear casing opening 213. In this embodiment, The resilient member 63 is a spring.

The rotating head 62 can be operated to rotate and switch the switching member 61 between a safe mode (see Figure 9), a peeling mode (see Figure 10), and a cutting mode (see Figure 11). When the switching member 61 is rotated, the cam face 612a cams the positioning block 541 to move the sheath unit 5 forward or backward relative to the cutting tube 3.

As shown in Figure 9, when the switching member 61 is switched to the safe mode, one of the safety recesses 614 engages with the positioning block 541, and the cutting end 31 is not exposed from the sheath unit 5.

As shown in Figure 10, when the switching member 61 is switched to the peeling mode, the first recess 615 engages with the positioning block 514, and the cutting end 31 is partially exposed from the sheath unit 5.

As shown in Figure 11, when the switching member 61 is switched to the cutting mode, the second recess 616 engages with the positioning block 541, and the cutting end 31 is entirely exposed from the sheath unit 5.

Referring to Figure 12 and 13, a guide needle assembly 7 is removably and axially disposed in the cutting tube 3 through the rear housing opening 213. The guide needle assembly 7 includes a stem of guide 71 extending axially into the cutting tube 3, and a connection head 72 connected to the guide rod 71 and disposed outside the rear housing opening 213. The guide rod 71 has a tip 711 that extends out of the sheath unit 5 opposite the connection head 72.

Referring to Figures 14 and 15, in combination with Figure 3, the surgical device of the disclosure further includes a check valve 8, and an adapter unit 9 removably connected to the housing unit 2. The check valve Retainer 8 is disposed in the accommodation space 211 and between the cutting tube 3 and the rear housing opening 213. The adapter unit 9 includes a tubular member 91 that extends into the accommodation space 211 through the rear opening of housing 213, an adapter head 92 connected to the tubular member 91 and disposed outside the rear opening of housing 213, and a channel 93 extending through the tubular member 91 and the adapter head 92 to communicate with the tube of cut 3. Channel 93 has a narrow open end 932 proximal to the cutting unit 3 and a wide open end 931 opposite the narrow open end 932 along the axial line (L). The 931 wide open end is larger than the 932 narrow open end.

To perform a surgical operation, the switching member 61 is first switched to the safe mode (see Figure 9) by rotating the rotary head 62, and the guide needle assembly 7 is inserted into the cutting tube 3 through of the rear casing opening 213. Subsequently, the needle assembly 7, the sheath unit 5 and the cutting tube 3 are inserted into a human body. The tip 711 of the needle assembly 7 can assist a user to preliminarily position the cutting tube 3 at a surgical site. As the cutting tube 3 is positioned, the guide needle assembly 7 is removed from the cutting tube 3. In this state, the check valve 8 prevents the gas in the human body from leaking from the rear casing opening 213 and provides an air-tight effect for the space inside the human body and the accommodation space 211, thereby facilitating subsequent operations. Then, the rotating head 62 is rotated to switch the switching member 61 to the peeling mode or the cutting mode, and then the push button 44 is pressed to drive the rotation of the cutting tube 3 for the peeling operation or the cutting operation. court. As each safety recess 614 is disposed between the first and second recesses 615, 616, when the rotary head 62 drives the rotation of the switching member 61, the switching member 61 always first switches to the safe mode before switching to the peeling mode. or cutting mode, thereby avoiding injury to the human body and improving the safety of use.

Considerably, when a more delicate operation is required, the adapter unit 9 can be connected to the housing unit 2, and in the channel 93 a surgical instrument (not shown) can be inserted through the wide open end 931 to extend forward and out of the cutting tube 3 to perform a surgical operation. When the surgical instrument is used during surgical procedures, the narrow open end 932 can reduce gas leakage from the body during surgery.

Claims (10)

1. A surgical device for cutting tissue in the body of a patient, comprising: a housing unit (2) having an accommodation space (211) having a front housing opening (212) and a rear housing opening (213) opposite said front housing opening (212) along a axial line (L) of said accommodation space (211); a cutting tube (3) arranged in said accommodation space (211) and rotating around the axial line (L), said cutting tube (3) including a cutting end (31) and projecting forward from said opening front of casing (212); a drive unit (4) for driving the rotation of said cutting tube (3); a sheath unit (5) jacketed over said cutting tube (3) and movable with respect to said cutting tube (3) along the axial line (L), said sheath unit (5) includes a front end of sheath (51) to cover said cutting end (31), a sheath rear end (52) opposite said sheath front end (51) along the axial line (L), and a positioning block (541) ) projecting from said rear end of sheath (52); and a switching unit (6) that includes a switching member (61) jacketed over and rotatable about said sheath rear end (52), said switching member (61) having a cam face (612a) for cam bearing said positioning block (541) to move forwards or backwards said sheath unit (5) with respect to said cutting tube (3), said cam face (612a) has two safety recesses (614), and first and second recesses (615, 616), said first and second security recesses (614) (614, 615, 616) are spaced angularly from each other, each of said security recesses (614) being disposed between said first and second recesses (615, 616), a rotating head (62) connected to said switching member (61) and rotatably extending in said housing unit (2) for rotating and switching said switching member (61) between a safe mode, a peeling mode, and a cutting mode, and a resilient member (63) jacketed over said sleeve unit (5) and compressibly disposed between said sleeve unit (5) and said rotating head (62) to force said sleeve unit (5) to move towards said rear opening of casing (213); wherein, when said switching member (61) is switched to safe mode, one of said safety recesses (614) engages said positioning block (541), and the cutting end (31) is not exposed from said sheath unit (5); wherein, when said switching member (61) is switched to peeling mode, said first recess (615) engages said positioning block (541), and said cutting end (31) is partially exposed from said cutting unit. sheath (5); and wherein, when said switching member (61) is switched to cutting mode, said second recess (616) engages said positioning block (541), and said cutting end (31) is exposed entirely from said cutting unit. cover (5). characterized in that a surgical device for cutting tissue in the body of a patient comprises a check valve (8) that is arranged in the accommodation space (211) and between the cutting tube (3) and the rear opening of the casing (213) in proximity to this rear opening (213), to prevent the gas in the human body leaks from the rear casing opening (213), and an adapter unit (9) removably connected to said housing unit (2), and includes a tubular member (91) that extends into the accommodation space (211) through the rear housing opening (213), and on the front end of the tubular member (91) of the adapter unit (9) rests against the check valve (8), an adapter head (92) connected to said tubular member (91) and disposed outside said rear housing opening (213), and a channel (93) extending through said tubular member (91) and adapter head (92) to communicate with said cutting tube (3), said channel (93) having a narrow open end (932) proximal to said cutting tube (3) and a wide open end (931) opposite said narrow open end (932) along the axial line (L), said wide open end (931) is larger than said open end narrow (932). 2. The surgical device for cutting tissue in the body of a patient according to claim 1, wherein: said sleeve unit (5) includes a tube member (53), and a positioning member (54) disposed at said rear end of sleeve (52), an outer diameter of said positioning member (54) is greater than a outer diameter of said tube member (53), said positioning member (54) has said positioning block (541); and said resilient member (63) resiliently abuts between said rotating head (62) and said positioning member (54). 3. The surgical device for cutting tissue in the body of a patient according to claim 2, wherein: said housing unit (2) further includes a fence plate (23) arranged proximal to said front housing opening (212), said fence plate (23) has a through hole (231) for insertion of said cutting tube (3), and a plurality of spaced limiting grooves (232) arranged around said through hole (231), each of said limiting grooves (232) extending radially outward from said through hole (231); and said positioning member (54) has a plurality of limiting ribs (542) extending towards said rear housing opening (213) and respectively engageable with said limiting grooves (232). 4. The surgical device for cutting tissue in the body of a patient according to claim 1, wherein: said housing unit (2) includes a main body (21) surrounding said accommodation space (211), and an annular flange (214) projecting from an interior surface of said main body (21) and surrounding said front opening casing (212); and said rotating head (62) has an annular groove (623) formed circumferentially therein and engaged with said annular rim (214). 5. The surgical device for cutting tissue in the body of a patient according to claim 1, wherein: said switching member (61) further has a plurality of angularly spaced engagement tabs (613) extending radially outward therefrom; and said rotating head (62) has a plurality of coupling grooves (624) respectively engaged with said coupling tabs (613). 6. The surgical device for cutting tissue in the body of a patient according to claim 1, wherein said safety recesses (614) are diametrically opposed to each other, said first and second recesses (615, 616) are diametrically opposite each other. 7. The surgical device for cutting tissue in the body of a patient according to claim 1, wherein: said switching member (61) further has a base plate (611) looped around said rear end of sleeve (52), and a surrounding wall (612) extending forwardly from said base plate (611); and said surrounding wall (612) has a front end formed with said cam face (612a), opposite said base plate (611) and extending around said rear end of sleeve (52), said surrounding wall (612) It also has two first inclined edges (617) and two second inclined edges (618), each of said first inclined edges (617) is connected between said first recess (615) and one of said safety recesses (614), said first Inclined edges (617) converge towards said first recess (615) from said safety recesses (614), each of said second inclined edges (618) connects between said second recess (616) and one of said safety recesses (614). ), said second inclined edges (618) converge towards said second recess (616) from said safety recesses (614); and an angle (01) formed between said first inclined edges (617) is greater than an angle (02) formed between second inclined edges (618). 8. The surgical device for cutting tissue in the body of a patient according to claim 1, wherein a distance (d2) between said cutting end (31) and said second (616) recess is greater than a distance ( d1) between said cutting end (31) and said first recess (615), said distance (d1) between said cutting end (31) and said first recess (315) is greater than a distance (d2) between said end of cut (31) and each of said safety recesses (614). 9. The surgical device for cutting tissue in the body of a patient according to claim 1, further comprising a guide needle assembly (7) disposed removably and axially in said cutting tube (3) through of said rear housing opening (213), said guide needle assembly (7) includes a guide rod (71) extending axially in said cutting tube (3), and a connection head (72) connected to said guide rod (71) and arranged outside said rear housing opening (213), said guide rod (71) has a tip (711) extending outside said sheath unit (5) and opposite said head connection (72). 10. The surgical device for cutting tissue in the body of a patient according to claim 1, wherein said drive unit (4) includes a conical gear (41) jacketed over said cutting tube (3), a gear drive (42) engaged with said bevel gear (41) to rotate said cutting tube (3) through said bevel gear (41), a drive member (43) to drive the rotation of said drive gear (42) ), and a button to activate said drive member (43).