Blocking forceps for preventing secondary injury in aortic dissection surgery

Abstract

The invention relates to the technical field of medical instruments, in particular to secondary injury prevention blocking forceps for aortic dissection surgery, which comprise a handheld cylinder, a first wrench and a second wrench are arranged on a holding part of the handheld cylinder, and a clamping head is detachably connected to the head of the handheld cylinder. The clamping head is provided with two elastic clamping pieces capable of elastically deforming, the two elastic clamping pieces are in an arc-shaped state when clamping a blood vessel, and the suspended ends of the two elastic clamping pieces are close to each other after capturing a target blood vessel, so that the blood vessel is locked between the two arc-shaped clamping arms; therefore, the situation that the surrounding blood vessels are affected due to the fact that traditional blocking forceps are opened by a large angle is avoided, the surrounding blood vessels can be prevented from being affected, then damage to the surrounding blood vessels is avoided, then the two elastic clamping pieces are gradually converted into the straight clamping arms, and the blood vessels are gradually and stably clamped to block blood flow in the blood vessels.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to a blocking forceps for preventing secondary injury in aortic dissection surgery. Background Art

[0002] During aortic dissection surgery, a clamp (also called a vascular clamp or aortic clamp) is a key surgical instrument used to temporarily block blood flow so that surgeons can perform repair surgery.

[0003] For example, Chinese patent CN118436397A discloses an aortic clamp, comprising a first clamp arm and a second clamp arm, the first clamp arm and the second clamp arm being hinged together by a rotating shaft, the first clamping portion and the second clamping portion being respectively located at the first ends of the first clamp arm and the second clamp arm, the first gripping portion and the second gripping portion being respectively located at the second ends of the first clamp arm and the second clamp arm, the lighting component being arranged on the first clamping portion and being suitable for providing light to the second clamping portion, the second clamping portion being made of a transparent material, the first soft film being arranged on the surface of the lighting component, and the second soft film being arranged on the surface of the second clamping portion, so that it can be intuitively observed whether the aorta is completely clamped, and the operator presses the first gripping portion and the second gripping portion so that the first clamping portion and the second clamping portion clamp the aorta, thereby completing the blocking of blood flow in the aorta.

[0004] However, the first clamping portion and the second clamping portion in the above solution need to be opened to a large extent in order to capture the target blood vessel. The large opening extent may affect the surrounding blood vessels and cause damage to the surrounding blood vessels. Summary of the Invention

[0005] Based on this, it is necessary to provide a blocking clamp for aortic dissection surgery that can prevent secondary damage to the surrounding blood vessels due to the large opening range of the current blocking clamp when clamping the aorta.

[0006] The above purpose is achieved through the following technical solutions: A blocking forceps for aortic dissection surgery to prevent secondary injury, comprising: A handheld cylinder having a grip portion; A clamping head, the clamping head being detachably connected to the head of the handheld cylinder, the clamping head being provided with two elastic clamping pieces, one end of the two elastic clamping pieces being rotatably connected to the clamping head, the other ends of the two elastic clamping pieces being suspended in the air, the two elastic clamping pieces being able to move closer to or further away from each other and being deformed when clamping a blood vessel; When the two elastic clamping pieces are in the first state, the two elastic clamping pieces bulge outward to form arc-shaped clamping arms to capture the blood vessel; When the two elastic clamping pieces are in the second state, the two elastic clamping pieces form a straight clamping arm to block the blood flow inside the blood vessel.

[0007] Furthermore, the two elastic clamping pieces include a plurality of hinge blocks, the plurality of hinge blocks are hinged to each other, and an elastic block is provided between adjacent hinge blocks. In the initial state, the elastic block pushes the adjacent hinge blocks to form an outwardly convex state with the hinge point as the rotation center; When the elastic block contracts, it pulls the adjacent hinge blocks to form a straight state with the hinge point as the rotation center; A first wrench is provided on the holding part, and a first steel wire rope is provided inside the two elastic clamping pieces. One end of the first steel wire rope is fixed to one suspended end of the two elastic clamping pieces, and the other end of the first steel wire rope is connected to the first wrench. The first wrench can pull the first steel wire rope to contract the elastic block.

[0008] Furthermore, two rotating shafts are provided in the clamping head, one end of two elastic clamping plates are respectively connected to the two rotating shafts, a second wrench is provided on the holding part, a second steel wire rope is wrapped around the outer circumference of the rotating shaft, one end of the second steel wire rope is connected to the outer circumference of the rotating shaft, and the other end of the second steel wire rope is connected to the second wrench, and a torsion spring is provided at the connection between the two rotating shafts and the clamping head.

[0009] Furthermore, a sliding sleeve is provided at the connection between the two elastic clamping pieces and the two rotating shafts, and the sliding sleeve is fixedly connected to the outer periphery of the rotating shaft. One end of the two elastic clamping pieces is slidably provided in the sliding sleeve. An elastic part is provided in the sliding sleeve, and one end of the elastic part is connected to one end of the elastic clamping piece located in the sliding sleeve, and the other end of the elastic part is connected to the inside of the sliding sleeve.

[0010] Furthermore, a locking assembly is provided in the clamping head, and the locking assembly can maintain or release the two elastic clamping pieces in the second state.

[0011] Furthermore, the locking assembly includes a locking head, a first locking block and a second locking block, the first locking block and the second locking block are axially slidably arranged in the clamping head, the first locking block is fixedly connected to the first steel wire rope, and the second locking block is fixedly connected to the second steel wire rope. There are two locking heads, and the two locking heads are radially slidably arranged in the clamping head. When the two locking heads approach each other, they are respectively unidirectionally engaged with the first locking block and the second locking block, and when the two locking heads move away from each other, they are respectively disengaged from the first locking block and the second locking block.

[0012] Furthermore, the clamping head is provided with an axially extending first slide groove and a second slide groove, the first locking block and the second locking block are respectively located in the first slide groove and the second slide groove, and the side wall of the clamping head is provided with two radially extending locking grooves, the two locking grooves are respectively connected to the first slide groove and the second slide groove, the two locking heads are respectively located in the two locking grooves, and the two locking heads can slide in the locking grooves.

[0013] Furthermore, a tension spring is provided at the bottom of the two locking grooves, one end of the tension spring is connected to the bottom of the locking groove, and the other end of the tension spring is connected to the locking head. A through hole is provided at the bottom of the two locking grooves, and a protrusion that cooperates with the through hole is provided on the locking head. A U-shaped clip is slidingly provided on the outside of the clamping head, and the U-shaped clip can push the protrusion to move axially along the through hole.

[0014] Furthermore, a matching sleeve is provided on the outer periphery of the clamping head, and the matching sleeve is detachably connected to the handheld cylinder.

[0015] Furthermore, the elastic block is made of medical silicone rubber.

[0016] The beneficial effects of the present invention are: The present invention provides two deformable elastic clamping pieces so that the two elastic clamping pieces are in an arc-shaped state when clamping a blood vessel. After the suspended ends of the two elastic clamping pieces capture the target blood vessel, they move closer to each other to lock the blood vessel between the two arc-shaped clamping arms. This can avoid the situation where traditional blocking forceps open at a large angle when capturing a blood vessel and affect surrounding blood vessels, thereby avoiding damage to the surrounding blood vessels. Subsequently, the two elastic clamping pieces gradually transform into straight clamping arms, gradually and steadily clamping the blood vessel to block the blood flow inside the blood vessel.

[0017] The present invention provides a sliding sleeve between the elastic clamping piece and the rotating shaft. The two elastic clamping pieces can move in the sliding sleeve toward the sliding sleeve, thereby reducing the locking range of the two elastic clamping pieces on the blood vessel, thereby causing the blood vessel to contract and increasing the wall thickness of the blood vessel to avoid rupture of the blood vessel wall.

[0018] The present invention provides a detachable clamping head and a locking assembly so that the clamping head can be locked by the locking assembly after being disassembled, thereby reducing the influence of the handheld cylinder on the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a secondary injury-preventing occluding forceps for aortic dissection surgery provided by one embodiment of the present invention; Figure 2 A front view of a first state of an occluding forceps for preventing secondary injury in aortic dissection surgery provided by one embodiment of the present invention; Figure 3 A front view of the second state of the occluding forceps for preventing secondary injury in aortic dissection surgery provided by one embodiment of the present invention; Figure 4 for Figure 2 A left side view of the first state of the occluding forceps for preventing secondary injury in aortic dissection surgery provided by an embodiment; Figure 5 for Figure 4 A cross-sectional view along AA of a choking clamp for preventing secondary injury in aortic dissection surgery provided in one embodiment; Figure 6 for Figure 5 A partial enlarged view of part X of the occluding forceps for preventing secondary injury in aortic dissection surgery provided in one embodiment; Figure 7 An exploded view of a secondary injury-preventing clamp for aortic dissection surgery provided by one embodiment of the present invention; Figure 8 A schematic diagram of the structure of the clamping head of a secondary injury-preventing occluding forceps for aortic dissection surgery provided by one embodiment of the present invention; Figure 9 for Figure 8 A left side view of the clamping head of the anti-secondary injury clamp for aortic dissection surgery provided in one embodiment; Figure 10 for Figure 9 A cross-sectional view of the clamping head of the aortic dissection surgery anti-secondary injury occluding forceps provided in one embodiment along the BB; Figure 11 for Figure 10 A partial enlarged view of the clamping head Y portion of the occluding forceps for preventing secondary injury in aortic dissection surgery provided in one embodiment; Figure 12 This is an exploded view of the clamping head of a secondary injury-preventing occluding forceps for aortic dissection surgery provided by one embodiment of the present invention.

[0020] in: 100, hand-held cylinder; 110, grip; 120, first wrench; 130, second wrench; 140, extension cylinder; 150, matching sleeve; 160, first wire rope; 170, second wire rope; 180, hook; 200, clamping head; 210, first slide groove; 220, second slide groove; 230, locking groove; 240, through hole; 250, U-shaped clamping plate; 260, limiting through groove; 270, tension spring; 300, elastic clamping piece; 310, hinge block; 320, elastic block; 330, rotating shaft; 340, sliding sleeve; 350, elastic member; 400, locking head; 410, first locking block; 420, second locking block; 430, one-way ratchet; 440, protrusion. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0023] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0024] Refer to the following Figures 1-12 The present invention will be used to describe a secondary injury-preventing blocking forceps for aortic dissection surgery.

[0025] A blocking forceps for preventing secondary injury in aortic dissection surgery is suitable for clamping the aorta to block blood flow during aortic dissection surgery, comprising a handheld cylinder 100, such as Figure 1 As shown, the handheld cylinder 100 has a gripping portion 110, and a first wrench 120 and a second wrench 130 are provided on the gripping portion 110. The head of the handheld cylinder 100 is detachably mounted with a clamping head 200. In the prior art, two clamping arms are generally mounted on the clamping head 200. The two clamping arms can clamp a blood vessel when they are close to each other. However, the two clamping arms need to be opened to a greater extent to capture the target blood vessel when clamping the blood vessel. A larger opening range will affect the surrounding blood vessels. For example, when clamping the target blood vessel, there are other blood vessels behind the target blood vessel. At this time, the two clamping arms will clamp other blood vessels at the same time when clamping the target blood vessel, which may cause damage to other blood vessels.

[0026] Therefore, in order to overcome the above problems, the present invention provides two elastic clamping pieces 300 on the clamping head 200. One end of the two elastic clamping pieces 300 is rotatably connected to the clamping head 200, and the other end of the two elastic clamping pieces 300 is suspended. The two elastic clamping pieces 300 can move closer to or farther away from each other when clamping the blood vessel, and can be deformed, that is, they have two states. In the first state, the two elastic clamping pieces 300 bulge outward to form an arc-shaped clamping arm, as shown in FIG. Figure 2 and Figure 6 As shown, the sides of the two elastic clamping pieces 300 that are close to each other are concave, and the suspended ends of the two elastic clamping pieces 300 will not affect the surrounding blood vessels after capturing the target blood vessels. Then, the two elastic clamping pieces 300 are switched to the second state. When in the second state, as shown Figure 3 As shown, the suspended ends of the two elastic clamping pieces 300 are in contact with each other, and the two elastic clamping pieces 300 form a straight clamping arm so as to clamp the blood vessel to block the blood flow inside.

[0027] By providing two deformable elastic clamping pieces 300, the two elastic clamping pieces 300 are in an arc-shaped state when clamping a blood vessel. After the suspended ends of the two elastic clamping pieces 300 capture the target blood vessel, they move closer to each other to lock the blood vessel between the two arc-shaped clamping arms. This avoids the situation where traditional blocking forceps need to open at a large angle when capturing the target blood vessel, thereby affecting the surrounding blood vessels. Subsequently, the two elastic clamping pieces 300 are gradually transformed into straight clamping arms, gradually clamping the blood vessel to block the blood flow inside the blood vessel.

[0028] Specifically, such as Figure 5 and Figure 6 As shown, the two elastic clamping pieces 300 in this embodiment are composed of multiple hinge blocks 310, and the multiple hinge blocks 310 are hinged together. The hinge point of each hinge block 310 is located on the side surfaces of the two elastic clamping pieces 300 formed by the multiple hinge blocks 310 that are close to each other. The intervals between each hinge point are the same, and multiple elastic blocks 320 are spaced apart on the sides that are away from each other. The multiple elastic blocks 320 are located between adjacent hinge blocks 310. The arrangement of the multiple elastic blocks 320 enables the adjacent hinge blocks 310 to rotate around the hinge center so that there is an angle between the adjacent hinge blocks 310, and there is an angle between the multiple hinge blocks 310 so that the two elastic clamping pieces 300 form an arc-shaped clamping arm. When the multiple elastic blocks 320 shrink, the adjacent hinge blocks 310 can be brought close to each other so that the two elastic clamping pieces 300 form a straight clamping arm.

[0029] It should be noted that the materials of the multiple hinge blocks 310 in this embodiment are all medical stainless steel, titanium alloy or aluminum alloy and other metals suitable for medical use. At the same time, the materials of the multiple elastic blocks 320 are all elastic materials such as medical silicone rubber.

[0030] More specifically, in order to achieve the contraction of multiple elastic blocks 320, a first steel wire rope 160 is provided inside the two elastic clamping pieces 300, one end of the first steel wire rope 160 is fixedly connected to the suspended end of the elastic clamping piece 300, and the other end of the first steel wire rope 160 passes through the other end of the elastic clamping piece 300 and is fixedly connected to the first wrench 120. It should be noted that the first steel wire rope 160 is forked into two at one end close to the two elastic clamping pieces 300, the two ends are connected to the two elastic clamping pieces 300, and the end connected to the first wrench 120 is one. When the operator turns the first wrench 120, the first steel wire rope 160 can be tightened 0, the first steel wire rope 160 pulls one end of the two elastic clamping pieces 300 that is suspended in the air, so that the multiple hinge blocks 310 forming the two elastic clamping pieces 300 can squeeze the elastic block 320. After the elastic block 320 contracts, the multiple hinge blocks 310 are brought closer to each other, so that the two elastic clamping pieces 300 are switched to straight clamping arms, and when the first steel wire rope 160 is tightened, the parts of the two arc-shaped clamping arms that are farthest apart are first approached to gradually clamp the blood vessel. When the first steel wire rope 160 is not subjected to the tightening force, the elastic blocks 320 between the adjacent hinge blocks 310 will be reset under the action of their own elastic force, so that the elastic clamping piece 300 will return to its arc shape.

[0031] More specifically, in order to enable the two elastic clamping pieces 300 to move closer to or further away from each other, two rotating shafts 330 are provided in the clamping head 200. The two rotating shafts 330 can rotate around their own axes. One end of the two elastic clamping pieces 300 is connected to the outer periphery of the two rotating shafts 330. When the two rotating shafts 330 rotate, the two elastic clamping pieces 300 can be driven to move closer to or further away from each other. In this embodiment, a second steel wire rope 170 is provided around the outer periphery of the two rotating shafts 330. One end of the second steel wire rope 170 is fixed to the outer periphery of the two rotating shafts 330, and the other end of the second steel wire rope 170 is fixedly connected to the second wrench 130. It should be noted that, in this embodiment, the second steel wire rope 170 near the end of the two rotating shafts 330 is also divided into two. The two rotating shafts 330 are connected separately, while one end connected to the second wrench 130 is a single shaft, and a torsion spring (not shown in the figure) is provided at the position where the two rotating shafts 330 of this embodiment are rotatably connected to the clamping head 200. In the initial state of the torsion spring, the two elastic clamping pieces 300 on the two rotating shafts 330 are kept away from each other, and the operator can tighten the second steel wire rope 170 by turning the second wrench 130. The second steel wire rope 170 pulls the rotating shaft 330 to rotate, thereby making the two elastic clamping pieces 300 approach each other to clamp the blood vessel. At the same time, the rotating shaft 330 pulls the torsion spring to store force. When the second steel wire rope 170 is not subjected to the tightening force, the torsion spring releases the elastic force to drive the rotating shaft 330 to reset, thereby making the two elastic clamping pieces 300 move away from each other.

[0032] It should be noted that, in the process of this embodiment using the first steel wire rope 160 to retract the two elastic clamping pieces 300 to switch from arc-shaped clamping arms to straight clamping arms, the arc-shaped clamping arms of the two elastic clamping pieces 300 gradually approach each other from the middle convex position, thereby gradually clamping the blood vessel from a cylindrical state to a flat state, thereby blocking the blood flow in the blood vessel. Clamping the blood vessel from the middle can allow space for expansion around the blood vessel, avoid wrinkles in the blood vessel when it changes from a cylindrical state to a clamped flat state, and thus prevent the blood vessel from being damaged secondary.

[0033] In a further embodiment, in order to increase the clamping effect of the two elastic clamping pieces 300 on the blood vessels, a sliding sleeve 340 is provided between the rotating shaft 330 and the elastic clamping piece 300, one end of the sliding sleeve 340 is fixedly connected to the outer periphery of the rotating shaft 330, and the other end of the sliding sleeve 340 is slidably connected to one end of the elastic clamping piece 300 so that one end of the elastic clamping piece 300 can move axially along the sliding sleeve 340 in the sliding sleeve 340, and an elastic member 350 is provided in the sliding sleeve 340, and the elastic member 350 can be a compression spring, one end of the elastic member 350 is fixedly connected to the sliding sleeve 340, and the other end of the elastic member 350 is fixedly connected to the elastic clamping piece 300. At one end, when the operator turns the first wrench 120 to tighten the first steel wire rope 160, the first steel wire rope 160 can overcome the elastic part 350 in the sliding sleeve 340, causing the elastic part 350 to be compressed. At this time, the two elastic clamping pieces 300 can move toward the direction close to the sliding sleeve 340, thereby reducing the clamping range of the two elastic clamping pieces 300, and allowing the blood vessels near this position to be partially contracted by the two elastic clamping pieces 300, and the wall thickness of the blood vessels is increased. In the subsequent clamping process of the two elastic clamping pieces 300, the rupture of the blood vessel wall can be prevented, and the effect of clamping the blood vessel can be improved, further avoiding secondary damage to the blood vessel.

[0034] In a further embodiment, in order to facilitate locking the clamping of the blood vessels by the two elastic clamping pieces 300, that is, locking the two elastic clamping pieces 300 in the second state, a locking assembly is provided on the clamping head 200 in this embodiment, and the locking assembly can lock or release the two elastic clamping pieces 300 in the second state.

[0035] Specifically, the locking assembly includes a locking head 400, a first locking block 410 and a second locking block 420. The first locking block 410 and the second locking block 420 are both axially slidingly arranged in the clamping head 200. The first locking block 410 is fixedly connected to the first steel wire rope 160, and the second locking block 420 is fixedly connected to the second steel wire rope 170. Therefore, when the first wrench 120 and the second wrench 130 tighten the first steel wire rope 160 and the second steel wire rope 170, the first locking block 410 and the second locking block 420 will be synchronously driven to move axially in the clamping head 200. There are two locking heads 400, and the two locking heads 400 are radially slidingly arranged in the clamping head 200. The two locking heads 400 can approach or move away from each other so that the two locking heads 400 are respectively in contact with or out of contact with the first locking block 410 and the second locking block 420. The first locking block 410 is provided with a one-way ratchet 430 on the end surface close to the locking head 400, and the locking head 400 is also provided with a one-way ratchet 430 on the end surface close to the first locking block 410, but in opposite directions. When the one-way ratchet 430 of the locking head 400 cooperates with the one-way ratchet 430 of the first locking block 410, the first locking block 410 can only move in one direction relative to the locking head 400, but cannot move in the opposite direction, and when the first wrench 120 is set to tighten the first steel wire rope 160, the first steel wire rope 160 can pull the first locking block 410 to move. If the operator releases the first wrench 120, the locking head 400 restricts the first locking block 410 from moving in the opposite direction, which can prevent the first steel wire rope 160 from loosening, thereby limiting the two elastic clamping pieces 300 to be in a state of straight clamping arms to clamp the blood vessel.

[0036] Similarly, a one-way ratchet 430 is also provided on the end surface of the second locking block 420 close to the locking head 400, and a one-way ratchet 430 is also provided on the end surface of the locking head 400 close to the second locking block 420, but the direction is opposite to the direction of the one-way ratchet 430 on the second locking block 420, so the second locking block 420 can only move in one direction relative to the locking head 400 and cannot move in the opposite direction. When the second wrench 130 is set to tighten the second steel wire rope 170, the second locking block 420 can be pulled to move relative to the locking head 400. If the operator releases the second wrench 130, the locking head 400 restricts the second locking block 420 from moving in the opposite direction, which can prevent the second steel wire rope 170 from loosening, thereby enabling the two rotating shafts 330 to drive the two elastic clamping pieces 300 to approach each other to continuously clamp the blood vessel.

[0037] Specifically, such as Figure 10 and Figure 11As shown, in this embodiment, a first sliding groove 210 and a second sliding groove 220 extending axially along the clamping head 200 are provided inside one end of the clamping head 200 close to the hand-held cylinder body 100, and the first locking block 410 and the second locking block 420 are respectively located in the first sliding groove 210 and the second sliding groove 220, and two locking grooves 230 are provided on the inner side wall of the clamping head 200. The two locking heads 400 are slidably arranged in the two locking grooves 230 and can move radially along the clamping head 200 in the locking grooves 230. The two locking grooves 230 in this embodiment are respectively connected to the first sliding groove 210 and the second sliding groove 220, so that the two locking heads 400 in the two locking grooves 230 can contact the first locking block 410 and the second locking block 420 when they extend out of the locking groove 230, thereby making the one-way ratchet teeth 430 on the first locking block 410 and the second locking block 420 able to cooperate with the one-way ratchet teeth 430 on the two locking heads 400.

[0038] More specifically, in order to enable the two locking heads 400 to release the unidirectional restriction of the first locking block 410 and the second locking block 420, a tension spring 270 is provided in the locking groove 230. The tension spring 270 can pull the locking head 400 to retract into the locking groove 230, and a protrusion 440 is provided on one end surface of the locking head 400 away from the first locking block 410 and the second locking block 420. A through hole 240 is provided at the bottom of the two locking grooves 230. The protrusion 440 extends out of the clamping head 200 through the through hole 240. The operator needs to press the protrusion 440 during use. The tension spring 270 in the locking groove 230 is overcome so that the locking head 400 extends out of the locking groove 230. The first locking block 410 and the second locking block 420 can be unidirectionally restricted by the two locking heads 400, thereby preventing the first steel wire rope 160 and the second steel wire rope 170 from loosening. When the aortic dissection surgery is completed and the clamping of the blood vessel needs to be stopped, the protrusion 440 on the locking head 400 can be loosened. The tension spring 270 in the locking groove 230 will pull the locking head 400 to retract into the locking groove 230, thereby releasing the unidirectional restriction on the first locking block 410 and the second locking block 420.

[0039] It should be noted that, in order to facilitate pressing the protrusion 440, a U-shaped card plate 250 is slidably provided on the outer wall of the clamping head 200, and a limiting groove 260 is opened on the two side walls of the U-shaped card plate 250. The size of the limiting groove 260 is larger than the size of the protrusion 440, and the surface of the protrusion 440 is spherical. When the limiting groove 260 on the U-shaped card plate 250 corresponds to the protrusion 440, that is, when the protrusion 440 is located in the limiting groove 260, the locking head 400 is retracted in the locking groove 230, and when the U-shaped card plate 250 slides on the clamping head 200, the protrusion 440 disengages from the limiting groove 230. 60 and is pressed by the two side walls of the U-shaped card plate 250, thereby causing the locking head 400 to extend out of the locking groove 230. At this time, the tension spring 270 is stretched, and the tension spring 270 has a tendency to pull the locking head 400 to retract into the locking groove 230. Therefore, when there is no need to limit the first locking block 410 and the second locking block 420, the U-shaped card plate 250 is slid in the opposite direction, and the limiting groove 260 on the U-shaped card plate 250 corresponds to the position of the protrusion 440 again. The tension spring 270 in the locking groove 230 pulls the locking head 400 to retract into the locking groove 230, and the protrusion 440 is re-located in the limiting groove 260.

[0040] Through the above-mentioned structural setting, the operator can slide the U-shaped clamping plate 250 before use to prevent the first steel wire rope 160 and the second steel wire rope 170 from loosening. After the operation, the operator can slide the U-shaped clamping plate 250 in the opposite direction to release the restrictions on the first locking block 410 and the second locking block 420, which is convenient and quick.

[0041] In a further embodiment, since the handheld cylinder 100 is large in size and will affect the aortic dissection surgery, the entire handheld cylinder 100 is removed after the clamping head 200 clamps the blood vessel, leaving only the clamping head 200 to clamp the blood vessel, thereby avoiding the handheld cylinder 100 affecting the surgery.

[0042] Specifically, the end of the clamping head 200 close to the hand-held cylinder 100 is detachably connected to the head of the hand-held cylinder 100, and a hook 180 is connected to the first steel wire rope 160 and the second steel wire rope 170 on the first locking block 410 and the second locking block 420. At the same time, a hook 180 is also provided on the first steel wire rope 160 and the second steel wire rope 170 inside the hand-held cylinder 100. When the clamping head 200 is connected to the hand-held cylinder 100, the two hooks 180 of the two first steel wire ropes 160 are connected, and the two hooks 180 of the two second steel wire ropes 170 are connected at the same time. When the operation is completed and the hand-held cylinder 100 needs to be removed, the two hooks 180 can be separated to remove the hand-held cylinder 100.

[0043] More specifically, a matching sleeve 150 is provided on the outer periphery of the clamping head 200 , one end of the matching sleeve 150 is fixedly connected to the head of the handheld cylinder 100 , and the other end of the matching sleeve 150 is detachably connected to the clamping head 200 .

[0044] It should be noted that, in order to increase the length of the head of the handheld cylinder body 100 , an extension cylinder 140 is installed on the head of the handheld cylinder body 100 , and the matching sleeve 150 is connected to the extension cylinder 140 .

[0045] The following describes the use of a secondary injury-preventing clamp for aortic dissection surgery provided by the present invention in combination with the above embodiments: The operator holds the gripping portion 110 of the handheld cylinder 100 and slides the U-shaped card plate 250, so that the protrusion 440 of the locking head 400 is pushed by the limiting groove 260 on the U-shaped card plate 250, and the protrusion 440 drives the locking head 400 to disengage from the locking groove 230 and then contact the first locking block 410 and the second locking block 420 to play a one-way restriction role. The operator controls the clamping head 200 by holding the cylinder. The two elastic clamping pieces 300 on the clamping head 200 are arc-shaped clamping arms in the initial state, that is, in the first state, and the two elastic clamping pieces 300 are away from each other, and one end of the two elastic clamping pieces 300 is suspended. To allow the target blood vessel to pass through, the operator turns the second wrench 130, and the second wrench 130 tightens the second steel wire rope 170. The second steel wire rope 170 pulls the two rotating shafts 330 to rotate, thereby reducing the distance between the two elastic clamping pieces 300, thereby adjusting the distance between the suspended ends of the two elastic clamping pieces 300 so that the distance is just enough to allow the target blood vessel to pass through. After the target blood vessel passes, the second wrench 130 is continued to be turned so that the suspended ends of the two elastic clamping pieces 300 contact each other to lock the blood vessel between the two elastic clamping pieces 300. At this time, the arc-shaped clamping arm will not affect the blood vessels around the target blood vessel when locking the target blood vessel.

[0046] Then, it is necessary to clamp the target blood vessel to block the blood flow in the target blood vessel. The operator turns the first wrench 120, and the first wrench 120 tightens the first steel wire rope 160. The first steel wire rope 160 pulls the two elastic clamping pieces 300 to move in the sliding sleeve 340 toward the rotating shaft 330 to compress the elastic member 350. The area of ​​the blood vessel surrounded by the two elastic clamping pieces 300 is reduced, which can cause the blood vessel wall to shrink a part and thus increase the thickness of the blood vessel wall to avoid rupture of the blood vessel wall. Then, when the first wrench 120 is continued to be turned, the first steel wire rope 160 is tightened and then pulls the multiple hinge blocks 310 forming the two elastic clamping pieces 300 to squeeze the elastic block 320, so that the two elastic clamping pieces 300 gradually switch from arc-shaped clamping arms to straight clamping arms. During the switching process, the middle parts of the two elastic clamping pieces 300 gradually approach each other to clamp the blood vessel. When the clamping arms are completely switched to straight clamping arms, the blood flow in the blood vessel is completely blocked.

[0047] Remove the hand-held cylinder 100: Twist the matching sleeve 150 to remove the handheld cylinder 100 from the clamping head 200, and separate the two hooks 180 connecting the two sections of the first steel wire rope 160, and at the same time separate the hooks 180 connecting the two sections of the second steel wire rope 170. Since the first steel wire rope 160 and the second steel wire rope 170 located in the clamping head 200 are respectively connected to the first locking block 410 and the second locking block 420, and the first locking block 410 and the second locking block 420 are unidirectionally restricted by the locking head 400, the first steel wire rope 160 and the second steel wire rope 170 are prevented from loosening, thereby preventing the two elastic clamping pieces 300 from loosening their clamping of the target blood vessel.

[0048] The operation is completed: After the aortic dissection surgery is completed, the blockage of the blood vessel needs to be released. At this time, the handheld cylinder 100 is connected to the clamping head 200, and the two sections of the first steel wire rope 160 and the two sections of the second steel wire rope 170 are connected through the hook 180. Then the operator toggles the first wrench 120 and the second wrench 130 so that the positions of the first wrench 120 and the second wrench 130 are the same as before disassembly, and slides the U-shaped clamping plate 250 in the opposite direction. The U-shaped clamping plate 250 releases the restriction on the protrusion 440, and the protrusion 440 is re-located in the restriction groove on the U-shaped clamping plate 250. 260, the locking head 400 re-enters the locking groove 230 under the action of the tension spring 270 to release the restriction on the first locking block 410 and the second locking block 420. At this time, the operator slowly releases the first wrench 120 and the second wrench 130, and the elastic blocks 320 on the two elastic clamping pieces 300 are reset, thereby restoring the two elastic clamping pieces 300 to arc-shaped clamping arms, and the rotating shaft 330 is reset under the action of the torsion spring, thereby causing the two elastic clamping pieces 300 to move away from each other, and the blood vessels gradually recover. The operator can then slowly take out the handheld cylinder 100.

[0049] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A choking forceps for preventing secondary injury in aortic dissection surgery, characterized in that: include: A handheld cylinder having a grip portion; A clamping head, the clamping head being detachably connected to the head of the handheld cylinder, the clamping head being provided with two elastic clamping pieces, one end of the two elastic clamping pieces being rotatably connected to the clamping head, the other ends of the two elastic clamping pieces being suspended in the air, the two elastic clamping pieces being able to move closer to or further away from each other and being deformed when clamping a blood vessel; When the two elastic clamping pieces are in the first state, the two elastic clamping pieces bulge outward to form arc-shaped clamping arms to capture the blood vessel; When the two elastic clamping pieces are in the second state, the two elastic clamping pieces form a straight clamping arm to block the blood flow inside the blood vessel.

2. The occluding forceps for preventing secondary injury in aortic dissection surgery according to claim 1, characterized in that: The two elastic clamping pieces include a plurality of hinge blocks, which are hinged to each other. An elastic block is provided between adjacent hinge blocks. In the initial state, the elastic block pushes the adjacent hinge blocks to form an outward convex state with the hinge point as the rotation center. When the elastic block contracts, it pulls the adjacent hinge blocks to form a straight state with the hinge point as the rotation center; A first wrench is provided on the holding part, and a first steel wire rope is provided inside the two elastic clamping pieces. One end of the first steel wire rope is fixed to one suspended end of the two elastic clamping pieces, and the other end of the first steel wire rope is connected to the first wrench. The first wrench can pull the first steel wire rope to contract the elastic block.

3. The occluding forceps for preventing secondary injury in aortic dissection surgery according to claim 2, characterized in that: Two rotating shafts are provided in the clamping head, one end of the two elastic clamping pieces are respectively connected to the two rotating shafts, a second wrench is provided on the gripping part, a second steel wire rope is wrapped around the outer circumference of the rotating shaft, one end of the second steel wire rope is connected to the outer circumference of the rotating shaft, and the other end of the second steel wire rope is connected to the second wrench, and a torsion spring is provided at the connection between the two rotating shafts and the clamping head.

4. The occluding forceps for preventing secondary injury in aortic dissection surgery according to claim 3, characterized in that: A sliding sleeve is provided at the connection between the two elastic clamping pieces and the two rotating shafts. The sliding sleeve is fixedly connected to the outer periphery of the rotating shaft. One end of the two elastic clamping pieces is slidably provided in the sliding sleeve. An elastic part is provided in the sliding sleeve. One end of the elastic part is connected to one end of the elastic clamping piece located in the sliding sleeve, and the other end of the elastic part is connected to the inside of the sliding sleeve.

5. The occluding forceps for preventing secondary injury in aortic dissection surgery according to claim 3, characterized in that: A locking assembly is provided in the clamping head, and the locking assembly can maintain or release the two elastic clamping pieces in the second state.

6. The occluding forceps for preventing secondary injury for aortic dissection surgery according to claim 5, characterized in that: The locking assembly includes a locking head, a first locking block and a second locking block, the first locking block and the second locking block are axially slidably arranged in the clamping head, the first locking block is fixedly connected to the first steel wire rope, and the second locking block is fixedly connected to the second steel wire rope. There are two locking heads, and the two locking heads are radially slidably arranged in the clamping head. When the two locking heads approach each other, they are respectively unidirectionally engaged with the first locking block and the second locking block, and when the two locking heads move away from each other, they are respectively disengaged from the first locking block and the second locking block.

7. The occluding forceps for preventing secondary injury in aortic dissection surgery according to claim 6, characterized in that: The clamping head is provided with an axially extending first slide groove and a second slide groove, the first locking block and the second locking block are respectively located in the first slide groove and the second slide groove, and the side wall of the clamping head is provided with two radially extending locking grooves, the two locking grooves are respectively connected to the first slide groove and the second slide groove, the two locking heads are respectively located in the two locking grooves, and the two locking heads can slide in the locking grooves.

8. The occluding forceps for preventing secondary injury for aortic dissection surgery according to claim 7, characterized in that: A tension spring is provided at the bottom of the two locking grooves, one end of the tension spring is connected to the bottom of the locking groove, and the other end of the tension spring is connected to the locking head. A through hole is provided at the bottom of the two locking grooves, and a protrusion that cooperates with the through hole is provided on the locking head. A U-shaped clip is slidingly provided on the outside of the clamping head, and the U-shaped clip can push the protrusion to move axially along the through hole.

9. The occluding forceps for preventing secondary injury in aortic dissection surgery according to claim 1, characterized in that: A matching sleeve is provided on the outer periphery of the clamping head, and the matching sleeve is detachably connected to the handheld cylinder.

10. The occluding forceps for preventing secondary injury for aortic dissection surgery according to claim 2, characterized in that: The elastic block is made of medical silicone rubber.

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