CN114366199A

CN114366199A - Medical operation retractor

Info

Publication number: CN114366199A
Application number: CN202210105393.7A
Authority: CN
Inventors: 郜士革
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-04-19

Abstract

The invention discloses a medical operation retractor, wherein a curve guide rail is arranged on the side surface of the front end of an operating bed, and a traction mechanism can move and be positioned on the curve guide rail; the hand wheel can lock the left and right rotation, the up and down movement and the position on the curved guide rail of the traction mechanism; the support is provided with a transverse hollow platform, the first clamping block and the second clamping block are respectively rotatably installed on the left side and the right side inside the transverse hollow platform, the extension rod is installed at the right end of the square rod structure and forms a thread pair, the extension rod can be rotated to realize transverse extension and retraction of the traction mechanism, the right end of the stay wire is provided with a hook which can be connected with a tissue drag hook or a trachea drag hook, the left end of the stay wire penetrates through a through round hole in the extension rod and penetrates through a smooth round hole in the left end of the square rod structure after penetrating through a crack between the first clamping block and the second clamping block, and the left end of the stay wire is provided with a pull ring; under the effect of first spring leaf and second spring leaf, first clamp splice and second clamp splice can realize one-way removal locking to the acting as go-between, and then lock the position of tissue drag hook or trachea drag hook.

Description

Medical operation retractor

Technical Field

The invention relates to the technical field of medical instruments, in particular to a medical operation retractor.

Background

The thyroid gland is positioned in front of the neck and fixed in front of the trachea by a fascia in front of the trachea, the main function of the thyroid gland is to synthesize, store and secrete thyroid hormone, the thyroid hormone has the main functions of promoting the metabolism of the organism and maintaining the normal growth and development of the organism, and has great influence on the development of a skeleton and a nervous system; in clinic, thyroid enlargement, thyroid tumor and the like need to be treated through surgical operation.

In order to expose the operation visual field and the pathological tissue in the thyroid operation, a retractor is required, the thyroid retractor is also called a thyroid retractor, the thyroid retractor used in the prior operation is usually only provided with one retractor head, medical workers hold the retractor to retract the operation part in the operation, the neck tissue structure is fine, the operation space is relatively small, the thyroid retractor is often required to be simultaneously pulled in multiple directions when the operation visual field is exposed, when the number of the retractor exceeds three, at least two medical workers are required to simultaneously perform retraction operation, the medical workers are easy to fatigue, the operation space is more narrow, and the operation is not beneficial to the operation; in addition, the recurrent laryngeal nerve at the lateral rear part of the trachea needs to be exposed in the thyroid operation, and the trachea is pushed away by medical staff with hands, so that the visual field of a doctor is influenced, the recurrent laryngeal nerve cannot be fully exposed due to the fact that hands are not stably supported for a long time due to fatigue, and the recurrent laryngeal nerve can be accidentally injured when lymph nodes are cleaned, so that symptoms such as hoarseness, water drinking and cough, dyspnea and the like appear on a postoperative patient; therefore, the development of a medical operation retractor which can replace a medical staff to hold the retractor for retracting, can also carry out multi-directional retracting and conveniently adjust the retracting angle and force is a technical problem to be solved urgently at present.

Disclosure of Invention

In order to solve the defects of the prior art, the invention aims to provide the surgical retractor which can replace the medical staff to hold the retractor for retraction, can also carry out multi-directional traction and is convenient to adjust the traction angle and force.

The technical scheme adopted by the invention is as follows: the utility model provides a medical operation retractor, includes operation table, curved guide rail, traction mechanism, its characterized in that: the curve guide rail is fixedly arranged on the side surface of the front end of the operating bed, and the traction mechanism is arranged on the curve guide rail and can move and position on the curve guide rail; two swing frames are rotatably mounted on the right side of a sliding table in the traction mechanism, two idler wheels are rotatably mounted on the right side of each swing frame, the four idler wheels are correspondingly mounted in semicircular grooves on the upper side and the lower side of a curve guide rail, so that the traction mechanism can move on the curve guide rail, a pressing block is mounted inside the sliding table and forms a moving pair, a round rod at the lower end of a support is vertically mounted inside the sliding table and is positioned on the left side of the pressing block, a hand wheel and the sliding table form a thread pair, the hand wheel is rotated clockwise to enable the right end of the hand wheel to press the round rod, the pressing block is pushed to move rightwards to enable the end face of the round rod on the right side of the pressing block to press the curve guide rail, and therefore the left-right rotation, the up-down movement and the position of the traction mechanism on the curve guide rail can be locked; the upper end of the support is transversely provided with a square rod structure, the right end of the square rod structure is provided with a threaded hole, a smooth round hole is formed in the left end of the square rod structure, a transverse hollow platform is arranged on the square rod structure, the first clamping block and the second clamping block are respectively rotatably installed on the left side and the right side in the transverse hollow platform, the extension rod is installed on the right end of the square rod structure and forms a thread pair, the extension rod can be rotated to realize transverse extension of the traction mechanism, the right end of the pull wire is provided with a hook which can be connected with a tissue drag hook or a trachea drag hook, the left end of the pull wire penetrates through a through round hole in the extension rod and penetrates out of the smooth round hole in the left end of the square rod structure after penetrating through a crack between the first clamping block and the second clamping block, and the left end of the pull wire is provided with a pull ring which can be convenient for medical personnel to apply force for traction; under the effect of first spring leaf and second spring leaf, first clamp splice and second clamp splice can realize one-way removal locking to the acting as go-between, and then lock the position of tissue drag hook or trachea drag hook.

Preferably, the cambered surface structure on the right side of the first clamping block is provided with sawteeth, the cambered surface structure on the left side of the second clamping block is provided with sawteeth, and the sawteeth have an anti-skid effect, so that the first clamping block and the second clamping block can clamp the pull wire more stably.

Preferably, the left side of the first clamping block is provided with a first shifting plate, the right side of the second clamping block is provided with a second shifting plate, and the first shifting plate and the second shifting plate are shifted forwards to enable the first clamping block and the second clamping block to release clamping of the stay wire.

Preferably, the whole curved guide rail is of a structure with a narrow front part and a wide rear part, a fillet which is excessively smooth is arranged at each corner, and two semicircular grooves are formed in the upper side and the lower side of the cross section of the curved guide rail.

Preferably, the tissue draw hook and the trachea draw hook are both provided with lightening strip holes, so that the weight of the draw hook can be lightened, and the air permeability can be kept.

Preferably, the right end of the extension rod is provided with a circular boss, and the outer side of the circular boss is provided with transverse grains capable of increasing friction force, so that medical personnel can conveniently rotate the extension rod to adjust the transverse extension of the traction mechanism.

Preferably, the retractor can also be used for retracting thoracic and abdominal cavity operations after properly extending the length of the curved rail.

The invention has the beneficial effects that: firstly, by adopting the surgical retractor, not only can tissues such as skin, muscle, fascia and the like at the surgical site be stably pulled, but also the trachea can be stably pulled, so that the recurrent laryngeal nerve can be fully exposed; the curved guide rail can be set into a structure with a narrow front part and a narrow back part according to the physiological characteristics of wide shoulders and narrow heads of a human body, and is arranged on the side surface of the operating bed, so that the occupation of the retractor on the operation space can be effectively reduced, and a doctor has a wider operation space; the four rollers are arranged on the sliding table through two swing frames, and the two swing frames can rotate, so that the traction mechanism can slide on the curve guide rail at will; the number of the traction mechanisms can be increased or decreased randomly according to the operation requirement, and the requirement of simultaneous multi-angle retraction in the thyroid operation can be met; the position of the traction mechanism on the curved guide rail is adjustable, the height of the traction mechanism is adjustable, the angle of the traction mechanism is adjustable, the position, the height and the angle of the traction mechanism can be locked by a hand wheel, and the extension amount of the traction mechanism can be adjusted by an extension rod, so that the traction mechanism can realize traction of any angle on an operation part and has high flexibility; the drawing force can be controlled by the pulling force of the medical staff to the pull ring, the first clamping block and the second clamping block can realize the one-way clamping of the pull wire according to the eccentric cam clamping principle, and the pull wire drawing device has the advantages of simple structure, convenience in operation and rapidness in action.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention in an operating state.

Fig. 2 is a schematic view of the overall structure of the pulling mechanism.

Fig. 3 is a schematic view of a vertical section structure of a sliding table position.

Fig. 4 is a schematic horizontal sectional view of the position of the lateral empty platform.

Fig. 5 is a schematic structural view of the slide table.

Reference numerals: the device comprises an operating table 1, a curve guide rail 2, a traction mechanism 3, a sliding table 4, a convex block 4.1, a side plate 4.2, a short shaft 4.3, a cavity 4.4, a locking screw hole 4.5, a hand wheel 5, a pull wire 6, a pull ring 6.1, a support 7, a round rod 7.1, a square rod 7.2, a transverse hollow table 7.3, a first limiting rod 7.4, a first rotating shaft 7.5, a first reed rod 7.6, a second limiting rod 7.7, a second rotating shaft 7.8, a second reed rod 7.9, an extension rod 8, a hook 9, a tissue draw hook 10, a trachea draw hook 11, a rolling wheel 12, a swing frame 13, a pressing block 14, a first clamping block 15.1, a first shifting plate 15.1, a first spring plate 16, a second clamping block 17.1, a second shifting plate 18 and a second spring plate.

Detailed Description

The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1, the curved guide rail 2 is fixedly installed on the side surface of the front end of the operating table 1, the curved guide rail 2 is integrally of a structure with a narrow front part and a wide rear part, each corner position is provided with a fillet which is excessively smooth, two semicircular grooves corresponding to the positions are arranged on the upper side and the lower side of the cross section of the curved guide rail 2, and the traction mechanism 3 is installed on the curved guide rail 2 and can move and be positioned on the curved guide rail 2.

As shown in fig. 2, 3, 4 and 5, the drawing mechanism 3 comprises a sliding table 4, a hand wheel 5, a pull wire 6, a support 7, an extension rod 8, a hook 9, a tissue drag hook 10, an air tube drag hook 11, a roller 12, a swing frame 13, a press block 14, a first clamp block 15, a first spring leaf 16, a second clamp block 17 and a second spring leaf 18, wherein the sliding table 4 is provided with a convex block 4.1 and a side plate 4.2, the convex block 4.1 and the side plate 4.2 are fastened and connected into a moving whole and are reinforced and connected by two triangular rib plates, the side plate 4.2 is provided with four short shafts 4.3, the two short shafts 4.3 at the front end are vertically and coaxially arranged, the two short shafts 4.3 at the rear end are vertically and coaxially arranged, the right end of the convex block 4.1 is longitudinally provided with a vertically through cavity 4.4, the left end of the cavity 4.4 is of a semi-cylindrical surface structure, the right end of the cavity 4.4 is of a square cylindrical surface structure, the middle position of the left end of the convex block 4.1 is transversely provided with a locking screw hole 4.5, the locking screw hole 4.5 is communicated with the cavity 4.4, a smooth round hole is transversely arranged in the middle of the side plate 4.2, and the smooth round hole is coaxial with the locking screw hole 4.5 and communicated with the cavity 4.4; the left side of the swing frame 13 is vertically provided with two coaxial circular holes, the right side is transversely provided with two parallel circular shafts which are arranged up and down, the right ends of the two circular shafts are coaxially and rotatably provided with two rollers 12, the rotating axes of the two rollers 12 are in the horizontal direction, the radius of the arc surface of each roller 12 is equal to the radius of the semicircular grooves at the upper side and the lower side of the curved guide rail 2, the two swing frames 13 are respectively arranged at the front end and the rear end of the side plate 4.2, and two round holes at the left side of the swing frame 13 are respectively and rotationally connected with two corresponding short shafts 4.3, the sliding table 4 is arranged at the outer side of the curved guide rail 2, and the four rollers 12 on the right side of the two swing frames 13 are correspondingly arranged in the semicircular grooves on the upper and lower sides of the curved guide rail 2, the four rollers 12 can roll in the semicircular grooves at the upper side and the lower side of the curved guide rail 2 and can prevent the sliding table 4 from disengaging, thereby realizing the movement of the traction mechanism 3 on the curved guide rail 2; the left end of the hand wheel 5 is provided with a wavy disc structure convenient for force application and rotation, the right end of the hand wheel 5 is provided with a thread structure, the hand wheel 5 is installed in a locking screw hole 4.5 and forms a thread pair, the left side of the pressing block 14 is of a square structure, the width of the square structure is the same as that of a square cylindrical surface structure at the right end of the cavity 4.4, the left end of the square structure is vertically provided with a semicircular groove, the radius of the semicircular groove is equal to that of the semicircular cylindrical surface structure at the left end of the cavity 4.4, the middle position of the right side of the pressing block 14 is transversely provided with a round rod, the pressing block 14 is installed in the cavity 4.4 to form a moving pair, and the round rod at the right side of the pressing block 14 and a smooth round hole in the middle of the side plate 4.2 are coaxially installed; a round rod 7.1 is vertically arranged at the lower end of the support 7, the radius of the round rod 7.1 is equal to that of a semicircular groove at the left end of the pressing block 14, the round rod 7.1 is arranged in the cavity 4.4 and is positioned at the left side of the pressing block 14, the round rod 7.1 can rotate left and right, so that the angle adjustment of the drawing mechanism 3 is realized, and the round rod 7.1 can move up and down, so that the height adjustment of the drawing mechanism 3 is realized; the hand wheel 5 is rotated clockwise, the right end of the hand wheel 5 can be tightly pressed against the round rod 7.1, the round rod 7.1 pushes the pressing block 14 to move rightwards simultaneously under the extrusion action of the hand wheel 5 rightwards, and the end face of the round rod on the right side of the pressing block 14 is tightly pressed against the curved guide rail 2, so that the left-right rotation, the up-down movement and the movement of the sliding table 4 of the round rod 7.1 can be locked, and the angle locking, the height locking and the position locking of the traction mechanism 3 are realized.

The upper end of the support 7 is a transversely arranged square rod structure 7.2, the square rod structure 7.2 is arranged at the top end of the round rod 7.1, a triangular rib plate is arranged between the square rod structure and the round rod structure for reinforcement connection, a threaded hole is formed in the center of the inside of the right end of the square rod structure 7.2, a smooth round hole is formed in the center of the inside of the left end of the square rod structure 7.2, the smooth round hole and the threaded hole at the right end of the square rod structure 7.2 are coaxial, and a round angle is formed in the left end of the smooth round hole; the square rod structure 7.2 is provided with a transverse hollow platform 7.3, the transverse hollow platform 7.3 is communicated with a threaded hole at the right end of the square rod structure 7.2 at the front end, the transverse hollow platform 7.3 is communicated with a smooth round hole at the left end of the square rod structure 7.2 at the rear end, the transverse hollow platform 7.3 is vertically provided with a first limiting rod 7.4, a first rotating shaft 7.5 and a first reed rod 7.6 at the left side, wherein the first limiting rod 7.4 is positioned in front of the first rotating shaft 7.5, the first reed rod 7.6 is positioned behind the first rotating shaft 7.5, the transverse hollow platform 7.3 is vertically provided with a second limiting rod 7.7, a second rotating shaft 7.8 and a second reed rod 7.9 at the right side, the second limiting rod 7.7 is positioned in front of the second rotating shaft 7.8, the second reed rod 7.9 is positioned behind the second rotating shaft 7.8, and the first limiting rod 7.4, the first rotating shaft 7.5, the first reed rod 7.7.7 and the second reed rod 7.9 are respectively in a left-right symmetrical relationship.

The left side of the first clamping block 15 is provided with a first shifting plate 15.1, the right side is provided with an arc surface structure, the arc surface structure is provided with sawteeth, the middle position of the first clamping block 15 is vertically provided with a round hole, the first clamping block 15 is arranged at the left side and the transverse hollow platform 7.3, and the round hole in the middle of the first clamping block 15 is coaxially and rotatably connected with the first rotating shaft 7.5, the first spring piece 16 is arranged at the left side of the transverse hollow platform 7.3 and is prevented from being separated and limited by the first spring piece rod 7.6, the front end of the first spring piece 16 is tightly pressed with the rear side surface of the first clamping block 15, the rear end of the first spring piece 16 is tightly pressed with the transverse hollow platform 7.3 and the side wall, therefore, under the action of the elastic force of the first spring piece 16, the first clamping block 15 always tends to rotate anticlockwise, the first limiting rod 7.4 can limit the rotation of the first clamping block 15 to prevent the first clamping block 15 from over-rotating, and the first shifting plate 15.1 is shifted forwards to enable the first clamping block 15 to rotate clockwise; the right side of the second clamping block 17 is provided with a second shifting plate 17.1, the left side is provided with an arc surface structure, the arc surface structure is provided with sawteeth, the middle position of the second clamping block 17 is vertically provided with a round hole, the second clamping block 17 is arranged at the right side and the transverse hollow platform 7.3, and the round hole in the middle of the second clamping block 17 is coaxially and rotatably connected with the second rotating shaft 7.8, the second spring piece 18 is arranged at the right side of the transverse hollow platform 7.3 and is limited by the second spring piece rod 7.9 in a disengagement prevention way, the front end of the second spring piece 18 is tightly pressed with the rear side surface of the second clamping block 17, the rear end of the second spring piece 18 is tightly pressed with the transverse hollow platform 7.3 and the side wall, therefore, under the action of the elastic force of the second spring piece 18, the second clamping block 17 always tends to rotate clockwise, the second limiting rod 7.7 can limit the rotation of the second clamping block 17, the second clamping block 17 is prevented from rotating excessively, and the second shifting plate 17.1 is shifted forwards to enable the second clamping block 17 to rotate anticlockwise.

The left end of the extension rod 8 is of a threaded rod structure, the right end of the extension rod is provided with a circular boss, cross threads capable of increasing friction force are arranged on the outer side of the circular boss, the left end of the extension rod 8 is installed in a threaded hole in the right end of the square rod structure 7.2 to form a thread pair, the circular boss at the right end of the extension rod 8 is rotated clockwise, the extension rod 8 can move leftwards and contract in the square rod structure 7.2, the circular boss at the right end of the extension rod 8 is rotated anticlockwise, the extension rod 8 can move rightwards and extend out of the square rod structure 7.2, and therefore transverse telescopic action of the traction mechanism 3 is achieved; the inside centre of a circle position of extension rod 8 is equipped with glossy through hole, and the through hole right-hand member is equipped with the fillet.

The left end of the tissue drag hook 10 is provided with a round hole, the right end of the tissue drag hook 10 is of a bent hook-shaped structure, and the tissue drag hook 10 is provided with a lightening bar hole, so that the weight of the drag hook can be lightened, the ventilation property can be kept, and the tissue drag hook 10 can be used for retracting skin, subcutaneous tissues, muscles and fascia; the left end of the trachea drag hook 11 is provided with a round hole, the right end of the trachea drag hook 11 is a bent hook-shaped structure, the size of the hook-shaped structure is slightly larger than that of the tissue drag hook 10, the trachea drag hook 11 is provided with a weight reduction strip hole, and the trachea drag hook 11 can be used for dragging a trachea and enabling recurrent laryngeal nerves to be fully exposed in an operation visual field.

6 right-hand members of acting as go-between be equipped with couple 9, couple 9 can catch the round hole of

tissue drag hook

10 or 11 left ends of trachea drag hook, 6 left ends of acting as go-between penetrate from the round hole that link up in the extension rod 8 to pass and wear out from the inside smooth round hole of square bar structure 7.2 left ends behind the crack between first clamp splice 15 and the

second clamp splice

17, 6 left ends of acting as go-between are equipped with pull ring 6.1, pull ring 6.1 can be convenient for medical personnel to carry out the application of force tractive.

The first embodiment is as follows: pulling the pull ring 6.1 leftwards can lead the pull wire 6 to pull the tissue drag hook 10 or the trachea drag hook 11 leftwards, thus realizing the retraction of the operation part; the tissue drag hook 10 or the trachea drag hook 11 can move rightwards by pulling the hook 9 rightwards, and then the retraction of the operation part is released.

Example two: when the pull wire 6 moves leftwards, the pull wire 6 can push the first clamping block 15 to rotate clockwise spontaneously, and meanwhile, the second clamping block 17 rotates anticlockwise spontaneously; when the pull wire 6 is in a static state, the first clamping block 15 and the second clamping block 17 clamp the pull wire 6 under the elastic force action of the first spring piece 16 and the second spring piece 18 respectively, and can prevent the pull wire 6 from moving rightwards spontaneously, so that the position of the tissue drag hook 10 or the trachea drag hook 11 is locked, and the stable traction on the operation part is realized.

Example three: when the tissue drag hook 10 or the trachea drag hook 11 needs to release the traction on the operation part, the first pulling plate 15.1 and the second pulling plate 17.1 are pulled forwards, so that the first clamping block 15 rotates clockwise, meanwhile, the second clamping block 17 rotates anticlockwise, the clamping on the pull wire 6 is released, and the hook 9 is pulled rightwards, so that the retraction on the operation part can be released.

Example four: a plurality of traction mechanisms 3 can be arranged on the curved guide rail 2 according to the operation requirement, and the operation position can be simultaneously retracted in multiple angles.

Claims

1. The utility model provides a medical operation retractor, includes operation table, curved guide rail, traction mechanism, its characterized in that: the curve guide rail is fixedly arranged on the side surface of the front end of the operating bed, and the traction mechanism is arranged on the curve guide rail and can move and position on the curve guide rail; two swing frames are rotatably mounted on the right side of a sliding table in the traction mechanism, two idler wheels are rotatably mounted on the right side of each swing frame, the four idler wheels are correspondingly mounted in semicircular grooves on the upper side and the lower side of a curve guide rail, so that the traction mechanism can move on the curve guide rail, a pressing block is mounted inside the sliding table and forms a moving pair, a round rod at the lower end of a support is vertically mounted inside the sliding table and is positioned on the left side of the pressing block, a hand wheel and the sliding table form a thread pair, the hand wheel is rotated clockwise to enable the right end of the hand wheel to press the round rod, the pressing block is pushed to move rightwards to enable the end face of the round rod on the right side of the pressing block to press the curve guide rail, and therefore the left-right rotation, the up-down movement and the position of the traction mechanism on the curve guide rail can be locked; the upper end of the support is transversely provided with a square rod structure, the right end of the square rod structure is provided with a threaded hole, a smooth round hole is formed in the left end of the square rod structure, a transverse hollow platform is arranged on the square rod structure, the first clamping block and the second clamping block are respectively rotatably installed on the left side and the right side in the transverse hollow platform, the extension rod is installed on the right end of the square rod structure and forms a thread pair, the extension rod can be rotated to realize transverse extension of the traction mechanism, the right end of the pull wire is provided with a hook which can be connected with a tissue drag hook or a trachea drag hook, the left end of the pull wire penetrates through a through round hole in the extension rod and penetrates out of the smooth round hole in the left end of the square rod structure after penetrating through a crack between the first clamping block and the second clamping block, and the left end of the pull wire is provided with a pull ring which can be convenient for medical personnel to apply force for traction; under the effect of first spring leaf and second spring leaf, first clamp splice and second clamp splice can realize one-way removal locking to the acting as go-between, and then lock the position of tissue drag hook or trachea drag hook.

2. The medical surgical retractor according to claim 1, wherein: the cambered surface structure on first clamp splice right side is provided with the sawtooth, is provided with the sawtooth on the cambered surface structure on second clamp splice left side, and the sawtooth has skid-proof effect, can make first clamp splice and second clamp splice more stable to the centre gripping of acting as go-between.

3. The medical surgical retractor according to claim 1, wherein: the left side of the first clamping block is provided with a first shifting plate, the right side of the second clamping block is provided with a second shifting plate, and the first shifting plate and the second shifting plate are shifted forwards to enable the first clamping block and the second clamping block to release clamping of the stay wire.

4. The medical surgical retractor according to claim 1, wherein: the whole structure that is narrow before wide after for the curve guide rail, and every turning position all is equipped with the fillet of excessive level and smooth, and both sides are provided with two semicircular grooves about the cross section of curve guide rail.

5. The medical surgical retractor according to claim 1, wherein: and the tissue drag hook and the trachea drag hook are both provided with lightening strip holes, so that the weight of the drag hook can be lightened, and the air permeability can be kept.

6. The medical surgical retractor according to claim 1, wherein: the right end of the extension rod is provided with a circular boss, and the outer side of the circular boss is provided with transverse grains capable of increasing friction force, so that medical personnel can conveniently rotate the extension rod to adjust the transverse extension of the traction mechanism.

7. The medical surgical retractor according to claim 1, wherein: after the length of the curve guide rail is properly prolonged, the retractor can also be used for retracting operations of thoracic cavity operations and abdominal cavity operations.