WO2016144089A1 - Foldable blade type retractor for minimally invasive surgery - Google Patents

Abstract

The present invention relates to a foldable blade type retractor for minimally invasive surgery, which is inserted in a folded state along a pin embedded in a pedicle of a vertebra and is then unfolded, the foldable blade type retractor comprising: a cylindrical frame which is inserted, with the pin received thereinside, along the pin; and two blades of which one side of each is coupled to the outer circumferential surface of the cylindrical frame so as to be rotatable, and which are rotated around the cylindrical frame in the opposite direction to each other to unfold. The foldable blade type retractor for minimally invasive surgery does not require additional dilators, can minimize damage to muscles because the retractor is inserted into the body of a patient at one time and then unfolded, can reduce surgery time, and can enable the blades to form openings stably because the blades are inserted into the body of a patient in a folded state and then unfolded and fixed so as to be immobile at a certain angle.

Description

Minimally Invasive Surgery Traction Unit with Folding Blade Type

The present invention relates to a folding blade type minimally invasive surgical traction device, and more particularly to a folding blade type minimally invasive surgical traction device that can be inserted into the patient's body with minimal invasion. .

In general, in the case of a conventional open surgery for treating a patient, a large incision site and a large amount of bleeding generated during surgery are slow to recover the patient after surgery, and a large scar remains after the operation, which affects a patient's later life. Recently, a new surgical technique of minimally invasive surgery (MIS) using laparoscopic surgical tools has been developed to overcome the shortcomings of open surgery.

Minimally Invasive Surgery is a surgical technique in which only the smallest incision is made on the surface of a patient's body using an elongated surgical tool specially designed to minimize the incision required for surgery. This minimally invasive surgery requires less incisions and significantly less bleeding than open surgery, so the patient's recovery period is faster and external scars are smaller. It is increasing.

Recently, minimally invasive surgical techniques have also been used in spinal disc surgery. Korean Patent Publication No. 10-2007-0109977 (less invasive surgical system and method) is a system for implanting a spinal fixation device in the vertebrae through the opening of the patient, the proximal end ), Distal end, and passageway from the proximal end to the distal end, at least one slot across the passageway, and flexible for engaging with the spinal fixation device. a cannula having a portion, wherein the at least one slot is configured to receive an elongated fixing device, to increase the size of the incision to form the opening. A retr with blade having at least one dilator having an elongated cylinder shape with a through channel and configured to be inserted past the at least one dilator need an actor).

Korean Laid-Open Patent Publication No. 10-2007-0109977 requires inserting at least one or more dilators continuously into a patient's body, after which a retractor is inserted over the dilators. The dilators are then removed and the retractor expands the incision to form an opening. According to this method, the dilator is always needed to insert the retractor into the patient's body, and when the at least one dilator is continuously inserted, the patient's muscles are swept every time the insertion is performed, and the muscle damage is very large. there is a problem.

The present invention is to solve the above problems of the prior art, and provides a folding blade-type minimally invasive surgical traction device to form an opening by opening the two blades (blade) after being inserted into the patient's body at a time in the folded state. The purpose of the invention is to.

It is also an object of the present invention to provide a folding blade type minimally invasive surgical traction device that can be inserted directly through an incision without requiring a plurality of dilators to insert the traction device.

In addition, the two blades constituting the traction device is inserted into the patient's body in a folded state, and then unfolded by using a separate rotating device to secure the movement of the two blades by the fixing means at a certain angle to use a separate device An object of the present invention is to provide a traction device for a minimally invasive surgery of the foldable blade type that can stably fix the blade without having to.

It is also an object of the present invention to provide a foldable blade type minimally invasive surgical traction device that can be firmly fixed to the traction device by inserting by sliding the pin embedded in the pedicle of the spine (axial). .

Minimally invasive surgical traction device of the foldable blade type according to an embodiment of the present invention for achieving the above object is a minimally invasive surgical retractor (retractor) that is unfolded after insertion into the human body in a folded state, the cylindrical frame; And one side is rotatably coupled to the outer circumferential surface of the cylindrical frame includes two blades which are rotated and extended in opposite directions with respect to the cylindrical frame as an axis.

On the other hand, the minimally invasive surgical traction device of the folding blade type according to another embodiment of the present invention for achieving the above object is a minimally invasive surgical traction that is unfolded after being inserted into a pin embedded in the pedicle of the spine in a folded state An apparatus (retractor), comprising: a cylindrical frame inserted into the pin while receiving the pin therein; And one side is rotatably coupled to the outer circumferential surface of the cylindrical frame includes two blades which are rotated and extended in opposite directions with respect to the cylindrical frame as an axis.

In addition, it may further include a fixing means for fixing the movement of the two blades to be rotated in the opposite direction to each other at a predetermined angle.

In addition, the fixing means is provided so as to be rotatable on the upper or lower portion of the cylindrical frame to rotate together when the first blade rotates and the protrusion is engaged with the fitting groove of the second blade by the elastic force of the elastic member of the first blade and the second blade The movement of the blade can be fixed.

In addition, the cylindrical frame is provided with a protrusion on the side, the fitting groove formed on one side of the first blade is coupled to the protrusion to rotate the cylindrical frame when the rotation of the first blade, the top of the cylindrical frame together with the rotation of the cylindrical frame The fixing means is rotatably coupled to each other, and the protrusion constituting the fixing means is engaged with the fitting groove formed on one side of the second blade by the elastic force of the elastic member to fix the movement of the first blade and the second blade. .

In addition, the first blade is provided with a first coupling portion for coupling with the cylindrical frame on one side, a fitting groove is formed at the lower end of the first coupling portion, the second blade is a second coupling for coupling with the cylindrical frame on one side The upper part of the second coupling part may be provided with a fitting groove to which the protrusion is engaged.

In addition, the two blades may be provided with a coupling groove or coupling hole that can be inserted between the two blades to be coupled to the rotating device for rotating the two blades in the opposite direction.

According to the foldable blade type minimally invasive surgical traction device according to the present invention, it does not require separate dilators, it is inserted into the body of the patient at once and then stretched to minimize the damage to the muscle, surgery It can save time.

In addition, since the blades are inserted into the patient's body in the folded state, the blades are fixed so as not to move at a predetermined angle, thereby stably forming the openings.

In addition, the traction device is inserted by sliding the pin embedded in the pedicle of the spine to the shaft can be firmly fixed the traction device is effective during the operation of the disc, etc. between the vertebral body.

Figure 1 is an exemplary view of the folding blade-type minimally invasive surgical traction device according to the present invention is inserted into the body of the patient riding a pin embedded in the pedicle of the spine.

Figure 2 is an exemplary view showing a state in which the two blades are unfolded after the foldable blade type minimally invasive surgical traction apparatus according to the present invention is inserted into the body.

Figure 3a is a first exploded perspective view of the traction device for minimally invasive surgery of the folding blade type according to the present invention.

Figure 3b is a second exploded perspective view of the traction device for the minimally invasive surgery of the folding blade type according to the present invention.

Figure 4a is an exemplary view showing a cutting blade is inserted by riding two pins embedded in the pedicle of the spine to form an incision for inserting the folding blade type minimally invasive surgical traction device according to the present invention.

Figure 4b is an exemplary view showing the folded state of the blade of the minimally invasive surgical traction device of the foldable blade inserted into the patient's body after pins embedded in the pedicle of the spine after the incision is made by the cutting blade.

Figure 4c is an exemplary view showing the two blades of the folding blade-type minimally invasive surgical traction device unfolded by rotating in the opposite direction using a rotating device.

Figure 4d is an illustration of the appearance of removing the rotating device after the two blades of the folding blade type minimally invasive surgical traction device by the rotating device.

Figure 4e is an illustration of the appearance of one complete opening by unfolding the two blades after inserting another folding blade type minimally invasive surgical traction device in the same manner.

Figure 4f is an illustration of the appearance of extending the interval between the two traction device using the expansion device after the insertion of two fold blade type minimally invasive surgical apparatus according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

1 to 3B, the minimally invasive surgical traction device 100 of the foldable blade type is inserted into a human body in a folded state, or unfolded after being inserted through a pin embedded in a pedicle of a spine in a folded state. It is a minimally invasive surgical retractor that pulls back the muscles in the body by stretching out.

The minimally invasive surgical traction device 100 of the foldable blade type includes a cylindrical frame 10 and two blades 30 and 50, and may further include a fixing means 70.

The cylindrical frame 10 can be inserted into the body of the patient without pins embedded in the pedicle of the spine, but is preferably inserted through the pins while receiving the pins embedded in the pedicle of the spine therein.

The two blades 30 and 50 are coupled to the outer circumferential surface of the cylindrical frame 10 so as to be rotatable, and are rotated and rotated in opposite directions with respect to the cylindrical frame 10 as an axis. A method of spreading the two blades 30 and 50 in opposite directions will be described in detail with reference to FIG. 4C below.

By inserting two folding blade type minimally invasive surgical traction device 100 into the patient's body in turn and then spreading the two blades (30, 50) in the direction opposite to each other with the cylindrical frame (10) as an axis When the muscles in the body are pushed and supported, a total of four blades can be used to form an opening for spinal surgery in the center. The two blades 30 and 50 are preferably bent in an arc shape.

The fixing means 70 fixes the movements of the two blades 30 and 50, which are rotated in opposite directions to each other, at a predetermined angle. For example, when the two circular blades 30 and 50 are in contact with each other and rotate about 35 to 45 degrees in opposite directions, the two blades 30 and 50 are fixed so as not to move anymore. This forms a semicircular shape.

Specifically, the fixing means 70 is provided so as to be rotatable on the upper or lower portion of the cylindrical frame 10 to rotate together with the rotation of the first blade 10 and the protrusions 76a and 76b constituting the fixing means 70. Is engaged with the fitting grooves 53a and 53b of the second blade 50 by the elastic force of the elastic member 73 to fix the movement of the first blade 30 and the second blade 50. The elastic member 73 can be any member surface having an elastic force, it is most preferably composed of a compression coil spring.

This will be described in more detail with reference to FIGS. 3A and 3B.

The cylindrical frame 10 has protrusions 11a and 11b at the lower side of the side, and fitting grooves 33a and 33b formed at one lower end of the first blade 30 to the protrusions 11a and 11b are coupled to the first blade. When the cylindrical frame 10 rotates together with the rotation of the 30, the upper portion of the cylindrical frame 10 is provided with a fixing means 70 coupled to be rotatable together during the rotation of the cylindrical frame 10, the fixing means ( The protrusions 76a and 76b constituting the 70 are engaged with the fitting grooves 53a and 53b formed at the upper end of one side of the second blade 50 by the elastic force of the elastic member 73 so that the first blade 30 and the first blade 30 and the first blade 30 are formed. 2 blade (50) is fixed to the movement. The protrusions 76a and 76b are also configured to be engaged with the two fitting grooves 53a and 53b.

The first blade 30 has first coupling parts 31 and 32 penetratingly coupled to the cylindrical frame 10 at one side, and fitting grooves 33a and 33b at lower ends of the first coupling parts 31 and 32. Is formed, the second blade 50 has a second coupling portion (51, 52) penetratingly coupled with the cylindrical frame 10 on one side, the projections 76a on the upper end of the second coupling portion (51, 52) , 76b) are formed fitting grooves 53a and 53b.

The upper portion of the cylindrical frame 10 coupled to the fixing means 70 is formed with a slot groove 12 of a predetermined length in the longitudinal direction.

The fixing means 70 includes a fixing member 75 and an elastic member 73 and a supporting member 71 to provide an elastic force. The upper portion of the cylindrical frame 10 passes through the fixing member 75 and the elastic member 73 in turn and finally fits inside the support member 71. When the traction device 100 is inserted with the pin embedded in the pedicle as the axis, the pin passes through the cylindrical frame 10, the fixing member 75, the elastic member 73 and the support member 71, and then the support member ( 71) is exposed on top.

The fixing member 75 is formed with a through hole 79 so that the upper portion of the cylindrical frame 10 is coupled through, and protrusions 76a and 76b coupled to the fitting grooves 53a and 53b by the elastic force of the elastic member 73. Is formed, the hole 78 formed on the side is inserted into the slot groove 12 of the cylindrical frame 10 through the hole 78 so that the fixing member 75 rotates together when the cylindrical frame 10 rotates together. A coupling pin 77 is provided.

The elastic member 73 is compressed between the support member 71 and the fixing member 75, and then the fixing member 75 rotates together when the cylindrical frame 10 rotates, and then fits the protrusions 76a and 76b. When the grooves 53a and 53b cross each other, the protrusions 76a and 76b provided on the lower portion of the fixing member 75 are pushed into the fitting grooves 53a and 53b of the second blade 50 by elastic force. Put it in.

Referring to FIG. 2, the first blade 30 and the second blade 50 extend in opposite directions, and the protrusions 76a and 76b of the fixing member 75 fit into the fitting grooves 53a of the second blade 50. And 53b), it can be seen that the first blade 30 and the second blade 50 are fixed without being moved any more.

Coupling grooves (34, 54) or coupling holes are inserted into the two blades (30, 50) is coupled between the two blades (30, 50), the rotary device for rotating the two blades (30, 50) in the opposite direction 34 and 54 are formed one by one.

4A to 4F, the process of inserting the minimally invasive surgical traction device 100 of the folding blade type according to the present invention will be described in detail.

First, the cutting pin is inserted into the patient's body by taking two pins embedded in the pedicle of the spine to perform an incision for insertion of the traction device 100.

After cutting, the cutting blade is removed, and the traction device 100, in which the blades 30 and 50 are folded, is inserted one by one with the pin as the axis. After inserting the traction device 100, the rotary device is inserted between the two blades 30 and 50, and then coupled to the coupling grooves 34 and 54 or the coupling holes 34 and 54 of the blades 30 and 50, and then the rotation device. Pressing the handle of the two blades (30, 50) are rotated by pushing in the opposite direction to each other.

When the two blades 30 and 50 rotate in opposite directions, the cylindrical frame 10 and the fixing means 70 rotate in the same direction as the first blade 30 and the second blade 50 is fixed. Rotate in the opposite direction to the means 70. As a result, the protrusions 76a and 76b constituting the fixing means 70 while intersecting with the fitting grooves 53a and 53b of the second blade 50 are rotated by an angle or more, and the elastic members 73 are elastic. The protrusions 76a and 76b are engaged with the fitting grooves 53a and 53b of the second blade 50, and the first blade 30 and the second blade 50 are fixed.

Figure 4e (a) shows the two tow device 100 is inserted in the above manner in pairs to form an opening in the center, (b) is the two tow device 100 unfolded I look down from above.

Finally, referring to FIG. 4F, the expansion device 80 may be engaged with each of the fixing members 75 constituting the two towing devices 100, and then the gap between the two towing devices 100 may be extended. . Expansion device 80 is a device for expanding the distance between the two traction device 100.

The expansion device 80 is engaged with the fixing member 75 of each of the two towing devices 100 to expand the two towing devices 100 so as to expand the first and second extension arms 82 and 84 and the first and second extension arms. The first and second spreaders 81 and 83 and the first and second spreaders 81 and 83, which are hinged to one end of the 82 and 84, respectively, penetrate through one end of the first and second spreaders 81 and 83, and a gear 86 is formed on one surface thereof. And a ratchet 88 installed on the rail block 85 and the moving tube 87 moving from the rail block 85 so as to be caught or released by the gear unit 86 of the rail block 85.

The first spreader 81 remains fixed to one end of the rail block 85, and the moving tube 87 coupled to and moved together with the second spreader 83 moves on the rail block 85 to ratchet ( 88) to be fixed to the rail block (85). Specifically, the hollow moving tube 87 is integrally formed at one end of the second spreader 83, the rail block 85 is installed to be movable through the moving tube 87, the moving tube The ratchet 88 is elastically rotated in the sieve 87 so that one end of the ratchet 88 is caught or released from the gear portion 86 of the rail block 85.

Although not shown in FIG. 4F, a pinion gear may be configured to be engaged with the gear portion 86 of the rail block 85 in the moving tube 87, and the second spreader 83 may be railed as the pinion gear rotates. By finely moving on the block 85, the amount of movement of the second spreader 83 can be finely adjusted.

When the moving tube 87 is moved, the second spreader 83 and the second extension arm 84 are moved, and the ratchet 88 is fixed to the gear unit 86 to fix the position so that the two towing apparatuses 100 are moved. The gap between them is extended and fixed.

According to the present invention, it does not require separate dilators, and it is possible to minimize the damage to the muscle and shorten the operation time by being inserted into the patient's body at once and then stretched.

In addition, since the blades are inserted into the patient's body in the folded state, the blades are fixed so as not to move at a predetermined angle, thereby stably forming the openings.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Of course, it is obvious that such changes will fall within the scope of the claims.

Claims (7)

A minimally invasive surgical retractor that is unfolded after insertion into the human body in a folded state, Cylindrical frame; And One side is rotatably coupled to the outer circumferential surface of the cylindrical frame traction device for the minimally invasive surgery of the folding blade type, characterized in that it comprises two blades which are rotated and unfolded in the opposite direction with respect to the cylindrical frame as an axis. A minimally invasive surgical retractor that is folded and inserted after being inserted into a pedicle of a spinal pedicle. A cylindrical frame inserted into the pin while accommodating the pin therein; And One side is rotatably coupled to the outer circumferential surface of the cylindrical frame traction device for the minimally invasive surgery of the folding blade type, characterized in that it comprises two blades which are rotated and unfolded in the opposite direction with respect to the cylindrical frame as an axis. The method according to claim 1 or 2, Minimally invasive surgical traction apparatus of the folding blade type, characterized in that it further comprises a fixing means for fixing the movement of the two blades rotated in opposite directions to each other at an angle. In the third, The fixing means is rotatably provided at the upper or lower portion of the cylindrical frame and rotates together when the first blade is rotated, and the protrusion is engaged with the fitting groove of the second blade by the elastic force of the elastic member so that the first blade and the second blade have the same shape. Minimally invasive surgical traction device of the folding blade type, characterized in that the movement is fixed. The method according to claim 1 or 2, The cylindrical frame has a protruding portion on the side, and the fitting groove formed on one side of the first blade is coupled to the protruding portion so that the cylindrical frame rotates when the first blade rotates, and when the cylindrical frame rotates on the upper portion of the cylindrical frame. And fixing means coupled to each other, and the protrusions constituting the fixing means engage the fitting grooves formed on one side of the second blade by the elastic force of the elastic member to fix the movement of the first blade and the second blade. Minimally invasive surgical traction device with foldable blade type. The method of claim 5, The first blade has a first coupling portion for coupling to the cylindrical frame on one side, the fitting groove is formed at the lower end of the first coupling portion, the second blade has a second coupling portion for coupling to the cylindrical frame on one side And, at the top of the second coupling portion traction device for the minimally invasive surgery of the folding blade type, characterized in that the fitting groove is formed to engage the projection. The method of claim 1, The two blades are inserted between the two blades traction device for the minimally invasive surgery of the folding blade type, characterized in that the coupling groove or coupling hole is formed, one by one can be coupled to the rotating device for rotating the two blades in the opposite direction.

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