CN209770489U

CN209770489U - Vein stripper

Info

Publication number: CN209770489U
Application number: CN201821056186.2U
Authority: CN
Inventors: 孟路阳
Original assignee: Hangzhou Lemi Medical Technology Co Ltd
Current assignee: Hangzhou Lemi Medical Technology Co Ltd
Priority date: 2018-07-05
Filing date: 2018-07-05
Publication date: 2019-12-13
Anticipated expiration: 2028-07-05

Abstract

The utility model provides a vein stripper which can be used in varicose vein operation and vein transplantation intercepting operation. The vein stripper is provided with only one tube body, one end of the tube body is provided with a handheld end, the other end of the tube body is a blood vessel separation part, the handheld end is provided with a liquid medicine injection interface, and an inner cavity of the tube body is used as a liquid medicine conveying flow passage; the blood vessel separation part comprises a cutting edge and a through hole penetrating through the tube wall, the blood vessel separation part is provided with a flaring section, the cutting edge is positioned at the end part of the flaring section, the flaring section is formed by gradually flaring a plurality of rows of circular rings from a cylindrical section along an outward-flaring arc line, the hole wall of the through hole is passivated, and the area of the through hole is larger than the minimum radial sectional area of the blood vessel separation part.

Description

Vein stripper

Technical Field

The utility model relates to a medical instrument for vein stripping operation.

Background

The following background is provided to aid the reader in understanding the present invention and is not admitted to be prior art.

The operations involving vein exfoliation are mainly varicose vein operations and autologous vein transplantation operations. The most frequent site of varicose veins is in the lower extremities, and therefore, most varicose vein surgery is performed on the greater saphenous vein of the lower extremities. The autograft surgery is a bypass or bypass surgery for taking a vein graft and cutting the vein graft from the great saphenous vein of the lower limb, and then using the vein graft to treat various artery and vein diseases.

The great saphenous vein is a superficial vein of the lower limb, originates from the medial end of the arch of the dorsal venous leg, runs through the front of the medial malleolus, accompanies the saphenous nerve along the medial edge of the lower leg, runs through about 2cm behind the medial malleolus of the femur, enters the medial part of the thigh, accompanies the medial cutaneous nerve of the thigh, gradually goes upwards, crosses the saphenous vein fissure hole below the outer part of the pubic tubercle, converges into the femoral vein, and the convergence point becomes the saphenous point.

At present, there are two methods for cutting or intercepting the great saphenous vein, one is to cut the skin and to steal the vein under direct vision. Its advantages are clear display, high wound, long vein incision, and high infection risk. The other is to use special instruments to perform subcutaneous incision to get the vein through the lower incision.

CN200710194557.3 discloses a vein excider for excising veins in operation of treating varicosity, the vein excider is wholly in the shape of a thin tube and comprises an outer sleeve for excising veins and an inner sleeve for injecting medicaments, the two sleeves are arranged on a handle, a steel tube is attached to the front part of the handle, a middle sleeve is further arranged between the two sleeves, a cutter handle is arranged on the middle sleeve, a cutter steel tube is attached to the front end of the handle, the three layers of sleeves are sequentially sleeved, the steel tubes are also sequentially sleeved, a flaring is arranged at the front end of the outer sleeve, and a cutting edge is arranged at the edge of the flaring. The blade is used to separate the vein from the surrounding tissue. The inner cannula is used for injecting anesthetic. When the cutting edge of the outer sleeve reaches a preset position, the middle sleeve is pushed, and the vein with the excision is cut off under the action of the middle sleeve and the outer sleeve. The disadvantage of this vein resectoscope is that: 1. the outer sleeve is used for separating the vein from the surrounding tissues, the inner sleeve is used for injecting liquid medicine, the middle sleeve is used for cutting off the vein, 3 sleeves are matched with each other to complete the phlebotomy operation, and the number of components is large, and the structure is complex. 2. The cutting edge of the outer sleeve is sharp, which is beneficial to separating veins from surrounding tissues, but because blood is remained in veins, when the sleeve is pushed forwards, the veins in the sleeve are restrained, the blood can be gathered in front of the sleeve, namely, compared with the veins in the sleeve, the blood can be gathered in the veins to enter the sleeve, so the veins in front of the sleeve can be relatively enlarged, the sharp cutting edge is easy to accidentally injure the veins to enter the sleeve, even the operation is not completed, the sharp cutting edge accidentally injures the veins to cut off, further the broken part of the veins is searched, an incision is made again on the skin of a patient, and then the instrument is performed again from a new incision to submerge under the skin and strip the veins, thereby prolonging the operation time and increasing the pain of the patient.

CN201711365745.8 discloses a tubular cutter for vein graft obtains, this tubular cutter includes tool bit, tunnel pipe and handle, and tool bit, tunnel pipe and handle connect gradually, and the tool bit is the tubular, and tool bit one end is the cutting edge, and the tool bit pore wall is equipped with cyclic annular bellying, and the bellying is close to cutting edge one side. The disadvantages of such a tubular tool are: the intention of bellying is that the messenger vein blood vessel gets into and draws in the tool bit, makes the vein vascular wall deviate from the cutting edge of tool bit relatively, but in fact because there is blood in the blood vessel, receives the extrusion of bellying when the blood vessel gets into the tool bit, probably causes the crowded wound of blood vessel. After the blood vessel is folded by the convex part, the blood in the blood vessel is pushed to the far-end, so that the blood vessel which does not enter the cutter head is expanded, and the blood vessel is easily accidentally injured when the cutting edge is pushed to the far-end. Therefore, when the tubular cutter is used for the vein cutting operation, the cutting and the squeezing of the blood vessel are easily caused, and the cut vein can not meet the requirement of the autologous vein transplantation operation. In addition, when the vein is cut with such a cutter, it is necessary to cut the skin and cut the vein after the cutter has reached a predetermined length. Two wounds are required to complete the vein cut, and the patient has more wounds.

In addition, although the object of varicose vein surgery and vein graft harvesting surgery may be the great saphenous vein, the requirements of the two surgeries are different, and the varicose vein surgery only needs to be cut off, and the perfect and non-injury of the vein is not required. The vein graft harvesting operation needs to ensure that the cut vein is perfect and free of injury, namely, no cutting injury and no squeezing injury. Therefore, the current devices for varicose veins and devices for cutting venous grafts cannot be used universally.

Disclosure of Invention

An object of the utility model is to provide a can be general in the vein stripper of varicosity operation and vein transplantation intercepting operation.

The vein stripper comprises a tube body, wherein one end of the tube body is provided with a handheld end, the other end of the tube body is a blood vessel separation part, the handheld end is provided with a liquid medicine injection interface, and an inner cavity of the tube body is used as a liquid medicine conveying flow channel; the blood vessel separation part comprises a cutting edge positioned at the end of the tube body and a through hole penetrating through the tube wall. The hand-held end refers to the handle or the end connected to the handle.

During the operation, the cutting edge contacts the human body at first, and the blood vessel is enclosed in the cutting edge, and when the body moved ahead to the telecentric end, the cutting edge separated blood vessel and surrounding tissue, simultaneously, the blood vessel got into blood vessel separation portion, worn out from the through-hole. The part to be separated in front of the blade forms a stress concentration part, after the liquid medicine is input, the liquid pressure is preferentially converged to the stress concentration part, and the liquid pressure assists the blade to cut off and separate the blood vessel and the surrounding tissues; meanwhile, the liquid medicine collection also guides the advancing direction of the instrument.

Blood vessel separation part

preferably, the lower limit of the inner diameter of the blood vessel separation part is 2mm, the upper limit of the outer diameter is 10mm, preferably, the inner diameter of the blood vessel separation part is 3.5 ~ 5mm, and the outer diameter of the blood vessel separation part is 4.3 ~ 5.8 mm.

Preferably, the vessel separation part comprises a flaring section and a cylindrical section, the flaring section is arranged in front of the cylindrical section, and the cutting edge is arranged at the end of the flaring section. Preferably, the flared section is formed by a series of rings that diverge forwardly from the cylindrical section along an outwardly-extending arc.

Viewed in axial cross-section, it can be seen that the two sides of the flared section are shown as flared curves. Therefore, when the tube body is pushed forwards, even if blood is pushed forwards, the blood vessel expands, the rear part of the flaring section contacts the expanded blood vessel, and a gap is kept between the cutting edge at the front end of the flaring section and the blood vessel, so that the cutting edge is prevented from cutting the blood vessel by mistake; the presence of the blade still separates the vessel from the surrounding tissue and cuts off the connection of the vessel to its side branches. Preferably, the cutting edge is formed by grinding at the end of the flaring segment. The end of the flaring section is ground for a circle to form an annular blade, and the pipe body moves straight to cut off the connection between the blood vessel and the surrounding tissues or the collateral blood vessels. Alternatively, the cutting edge is cylindrical and smoothly transits to the flaring section. So, can guarantee that the direction of cutting edge is unanimous with the direction that the body gos forward. Preferably, the through hole is arranged on the cylindrical section; or the through hole is arranged at the flaring section; or one part of the through hole is positioned in the flaring section, and the other part of the through hole is positioned in the cylindrical section.

Through hole of blood vessel separation part

Preferably, the walls of the through holes are passivated. When the blood vessel penetrates out, the wall of the through hole is prevented from cutting the blood vessel, the integrity of the blood vessel is kept, and no cut is generated due to the through hole.

Preferably, the area of the through hole is larger than the radial sectional area of the blood vessel separating portion. The through hole is used for penetrating out the blood vessel from one side of the tube body, so that the blood vessel can conveniently penetrate out according to the size of the through hole, and the extrusion injury caused by the through hole is avoided. Preferably, the through hole has a cut depth of half the diameter of the pipe body. The through holes are formed by cutting off a part of the pipe wall from the radial direction, and the radial dimension of the cut-off pipe wall is used as the cutting depth.

Preferably, the wall of the through hole is a plane, and the adjacent edges of the through hole are in arc transition. When the through hole is machined, the cutting edge enters from the direction perpendicular to the pipe body, the cutting edge feeds to the center of the pipe body along an arc path, after the cutting depth reaches the position, the cutting edge feeds along a straight line, then the cutting edge feeds to the outside of the pipe body along the arc path, and the cutting edge leaves from the direction perpendicular to the pipe body. Therefore, the hole wall of the through hole can be flat.

Preferably, the wall of the distal end of the through hole is provided with an edge. When the body moves to preset the position, withdraw the body backward, the sword of through-hole cuts off the blood vessel. The blood vessel is taken out and the tube body is withdrawn from the human body. Preferably, the edge of the through hole is a single-sided edge. The single-sided blade is obtained by grinding only the outer surface of the pipe body or the inner surface of the pipe body. Preferably, the edge of the through hole is inclined outwardly from the hole wall surface of the tube body. Thus, when the tube body is submerged towards the far end and the blood vessel is penetrated out, the wall surface of the hole of the tube body does not cut the blood vessel, and when the blood vessel needs to be cut, the tube body is pulled towards the near end, and the blade cuts the blood vessel. Alternatively, the edge of the through hole is inclined inward from the outer wall surface of the tube body. Grinding from outside to inside, and convenient processing.

The other scheme is as follows: the wall of the through hole is an inclined plane. When the through hole is processed, the cutting edge is cut in from the slant direction, and is fed forwards along the arc line, and then is separated from the pipe body in the slant direction. The wall of the through hole processed in the way is provided with an edge, and the through hole can be used for cutting off blood vessels.

Preferably, the tube body has only one lumen as a liquid medicine transfer flow path. The lumen axially extends through the entire body, including the vessel separation. The single-tube single cavity realizes vein stripping and liquid medicine delivery.

Preferably, the tube body is divided into a blood vessel separating part, a connecting part and a handheld end, the connecting part is arranged between the blood vessel separating part and the handheld end, and the upper limit of the outer diameter of the connecting part is 10 mm.

Preferably, the diameter of the connecting portion is equal to the diameter of the cylindrical section of the blood vessel separating portion, and the diameter includes an inner diameter and an outer diameter. So, the proximal end of the tube body is used as a handheld end, the blood vessel separation part can be manufactured by punching and grinding the distal end and forming a through hole at the side wall opening, and the tube body is an integrated tube body, so that the manufacturing process is simplified. And the diameter of the pipe body and the diameter of the cylindrical section of the blood vessel separation part are also beneficial to maintaining the rigidity of the pipe body. If the diameter of the connecting portion is too small, the rigidity of the pipe body is also weakened.

Preferably, the outer diameter of the connecting portion is equal to the outer diameter of the cylindrical section of the blood vessel separating portion, and the inner diameter of the connecting portion is smaller than the inner diameter of the cylindrical section of the blood vessel separating portion. The blood vessel passes through the through hole, so that the blood vessel does not enter the connecting part, and the liquid medicine in the connecting part does not contact human tissues, therefore, the less the liquid medicine amount in the connecting part is, the less the total amount of the liquid medicine is used, and the liquid medicine amount contacting the human tissues is not influenced. The inner diameter of the connecting part is reduced, so that the use amount of the liquid medicine can be reduced. Preferably, the connecting portion has a bushing therein. Or the tube wall thickness of the connecting part is larger than that of the blood vessel separating part.

Or the connecting part is a transition section and a cylindrical section, the transition section is arranged between the blood vessel separating part and the cylindrical section of the connecting part, and the diameter of the cylindrical section of the connecting part is smaller than that of the cylindrical section of the blood vessel separating part. The diameter includes internal diameter and external diameter, and the cylinder section external diameter of connecting portion is less than the cylinder section external diameter of blood vessel separation portion promptly, and the cylinder section internal diameter of connecting portion is less than the cylinder section internal diameter of blood vessel separation portion.

Preferably, the inner wall of the blood vessel separation part is provided with a liquid guide groove, and the liquid guide groove is used for guiding the liquid medicine to go out. When the blood vessel penetrates into the tube body and penetrates out of the through hole, the blood vessel basically fills the space between the tube body and the through hole, and the liquid guide groove is arranged to guide the liquid medicine tube to flow out of the tube body. The liquid guide groove is arranged at the section from the through hole to the blade, can guide most of liquid medicine to flow out from the blade end, and is favorable for the liquid medicine to be gathered to the stress concentration part. The liquid medicine flows out evenly, and the vein is wrapped in the liquid medicine, so that the functions of anaesthetizing and separating blood vessels and surrounding tissues are achieved, and the latent direction of the catheter body can be guided.

Preferably, the pipe body is a one-piece stainless steel pipe. Or the pipe body is a plastic pipe, and the cutting edge is a metal cutting edge partially embedded in the plastic pipe. The plastic pipe has good self-lubricating property and smoothness, is not easy to crush or cut blood vessels, and has lower cost compared with the metal pipe.

Hand-held terminal

As the preferred scheme, the handheld end comprises a handle, the handle is connected with the tube body, the handle is provided with a liquid medicine channel, the liquid medicine channel is communicated with the inner cavity of the tube body, and the liquid medicine injection port is positioned on the handle. The liquid medicine injection pump or the injector is connected with the liquid medicine injection interface, and the liquid medicine enters the liquid medicine conveying flow passage through the liquid medicine passage and reaches the human body.

Preferably, the handle has a connecting portion including a plurality of clamps spaced apart from each other to define a space for allowing the tubular body to be inserted, and a nut engaged with the clamps to lock the tubular body between the clamps. The mode of leading to the screw thread pair makes anchor clamps draw together each other, and the handle of a model just can be convenient for cooperate the body of different external diameters.

One-way valve

Preferably, the tube body is connected with a one-way valve. The one-way valve prevents the liquid medicine, the blood and the body fluid from flowing backwards. Preferably, the check valve is connected to the liquid medicine injection connector. To facilitate the setting of the one-way valve.

The utility model has the advantages that: can be generally used for varicose vein operations and vein transplantation intercepting operations; the blood vessel is not cut off or injured by mistake in the operation process; the blood vessel and the surrounding tissues are separated by means of the combined action of the hydraulic pressure of the liquid medicine and the knife edge, the whole operation can be completed by only one wound without additionally injecting anesthetic, and the pain of a patient is relieved.

Drawings

Fig. 1 is a perspective view of the tube of the present invention.

Fig. 2 is a sectional view of the pipe body of the present invention.

Figure 3 is a schematic view of a flare of the present invention.

Fig. 4 is a perspective view of a first through hole of the present invention.

Fig. 5 is a front view of a first through-hole of the present invention.

Fig. 6 is a cross-sectional view of a second through-hole of the present invention.

Fig. 7 is a cross-sectional view of the handle of the present invention.

Fig. 8 is a perspective view of the clamp on the handle of the present invention.

Fig. 9 is a perspective view of the fixing nut of the present invention.

Fig. 10 is a cross-sectional view of the fixing nut of the present invention.

Detailed Description

The following detailed description of the present invention is not intended to limit the present invention in any way, except as to the structures and terminology used herein.

Vein denudation

Vein stripping is the separation of the great saphenous vein from the surrounding tissue and the severing of the target vein from the side branch at the target vein to side branch junction. When the operation is performed on the varicose vein, the cutting and the squeezing wound of the target vein are not considered, but the mistaken cutting of the vein is avoided in the operation process. When the operation of cutting the vena cava graft is performed, perfect blood vessels need to be obtained besides ensuring that the blood vessels are not cut by mistake, namely, the blood vessels are not cut or crushed.

Vein stripper

A vein denuder is an instrument for performing vein denuded surgery. As shown in fig. 1 and 2, the vein stripper comprises a tube body 1, one end of the tube body is provided with a handheld end 2, the other end of the tube body is provided with a blood vessel separation part 3, the handheld end is provided with a liquid medicine injection interface, and the inner cavity of the tube body is used as a liquid medicine conveying flow channel; the blood vessel separating part 3 comprises a blade 3011 at the end of the tube body and a through hole 3021 penetrating through the tube wall. The hand-held end refers to the handle or the end connected to the handle.

Blood vessel separation part

the blood vessel separation part is a part of the tube body, the blood vessel separation part realizes the separation of a target blood vessel from surrounding tissues, and the separated blood vessels do not gather in the cavity of the tube body, the structure of the blood vessel separation part is independent of the number of sleeves of the vein stripper, and the blood vessel separation part is arranged on the tube body for realizing the separation of the blood vessel from the surrounding tissues.

In some embodiments, the area of the through-hole is greater than the radial cross-sectional area of the vessel separation. The cutting depth of the through hole accounts for half of the diameter of the pipe body. The through holes are formed by cutting off a part of the pipe wall from the radial direction, and the radial dimension of the cut-off pipe wall is used as the cutting depth. The through hole is used for penetrating out the blood vessel from one side of the tube body, so that the blood vessel can conveniently penetrate out according to the size of the through hole, and extrusion injury caused by the through hole are avoided.

In some embodiments, the walls of the through holes are planar, and the adjacent edges of the through holes are in arc transition. When the through hole is machined, the cutting edge enters from the direction perpendicular to the pipe body, the cutting edge feeds to the center of the pipe body along an arc path, after the cutting depth reaches the position, the cutting edge feeds along a straight line, then the cutting edge feeds to the outside of the pipe body along the arc path, and the cutting edge leaves from the direction perpendicular to the pipe body. Therefore, the hole wall of the through hole can be flat.

And passivating the wall of the through hole. When the blood vessel penetrates out, the wall of the through hole is prevented from cutting the blood vessel, the integrity of the blood vessel is kept, and no cut is generated due to the through hole. When the through hole is passivated, the blood vessel is cut off by controlling the advancing angle of the tube body when necessary by means of the blade of the blood vessel separating part. In the case of a varicose vein operation, the separated vein may be cut and then withdrawn. Or the blood vessel separation part can be directly withdrawn without cutting off the blood vessel after running in place and cutting off the connection of the target blood vessel and the side branch thereof. After the target blood vessel is cut off from the side branch blood vessel, no blood vessel delivers blood to the target blood vessel, and the target blood vessel with varicose veins naturally shrinks, thereby achieving the purpose of treating varicose veins.

Or the hole wall of the far end of the through hole is provided with a blade. When the body moves to preset the position, withdraw the body backward, the sword of through-hole cuts off the blood vessel. The blood vessel is taken out and the tube body is withdrawn from the human body. When the pipe body is a plastic pipe, the metal blade is embedded in the through hole to form a blade.

The edge of the through hole can be a double-sided edge or a single-sided edge. The single-sided blade is obtained by grinding only the outer surface of the pipe body or the inner surface of the pipe body. The edge of the through hole is inclined outward from the hole wall surface of the tube body. Thus, when the tube body is submerged towards the far end and the blood vessel is penetrated out, the wall surface of the hole of the tube body does not cut the blood vessel, and when the blood vessel needs to be cut, the tube body is pulled towards the near end, and the blade cuts the blood vessel. Alternatively, the edge of the through hole is inclined inward from the outer wall surface of the tube body. Grinding from outside to inside, and convenient processing.

In some embodiments, the walls of the through-holes are beveled. When the through hole is processed, the cutting edge is cut in from the slant direction, and is fed forwards along the arc line, and then is separated from the pipe body in the slant direction. The hole wall of the bevel of the through hole processed in the way is equivalent to a blade and can be used for cutting off blood vessels.

In some embodiments, the vessel separating portion includes a flared section and a cylindrical section, the through hole is disposed in the cylindrical section, the flared section is located in front of the cylindrical section, the cutting edge is located at the end of the flared section, and the flared section is formed by a series of rings which are gradually flared forward from the cylindrical section along an outward-flaring arc. Viewed in axial cross-section, it can be seen that the two sides of the flared section are shown as flared curves. Therefore, when the tube body is pushed forwards, even if blood is pushed forwards, the blood vessel expands, the rear part of the flaring section contacts the expanded blood vessel, and a gap is kept between the cutting edge at the front end of the flaring section and the blood vessel, so that the cutting edge is prevented from cutting the blood vessel by mistake; the presence of the blade still separates the vessel from the surrounding tissue and cuts off the connection of the vessel to its side branches.

The blade is formed by grinding at the end of the flaring section. The end of the flaring section is ground for a circle to form an annular blade, and the pipe body moves straightly without rotating to cut off the connection between the blood vessel and the surrounding tissues or the collateral blood vessels. Alternatively, the cutting edge is cylindrical and smoothly transits to the flaring section. So, can guarantee that the direction of cutting edge is unanimous with the direction that the body gos forward.

Pipe body

The tube body is a part inserted into the body of a patient during an operation, and must have certain rigidity to ensure that the tube body does not deform during the operation. The blood vessel separation part, the liquid medicine conveying flow passage and the handheld end are all integrated in the tube body. The tube body is used for separating the blood vessel from the surrounding tissues.

In some embodiments, the tube body has only one lumen, which serves as a medical fluid delivery flow path. The lumen axially extends through the entire body, including the vessel separation. The single-tube single cavity realizes vein stripping and liquid medicine delivery. The body divides into blood vessel separation portion, connecting portion and handheld end, and connecting portion are between blood vessel separation portion and handheld end, and the external diameter upper limit of connecting portion is 10 mm.

In some embodiments, the connecting portion has a diameter equal to a diameter of the cylindrical section of the vessel separating portion, the diameter including an inner diameter and an outer diameter. So, the proximal end of the tube body is used as a handheld end, the blood vessel separation part can be manufactured by punching and grinding the distal end and forming a through hole at the side wall opening, and the tube body is an integrated tube body, so that the manufacturing process is simplified. And the diameter of the pipe body and the diameter of the cylindrical section of the blood vessel separation part are also beneficial to maintaining the rigidity of the pipe body. If the diameter of the connecting portion is too small, the rigidity of the pipe body is also weakened.

Or the outer diameter of the connecting part is equal to that of the cylindrical section of the blood vessel separation part, and the inner diameter of the connecting part is smaller than that of the cylindrical section of the blood vessel separation part. The blood vessel passes through the through hole, so that the blood vessel does not enter the connecting part, and the liquid medicine in the connecting part does not contact human tissues, therefore, the less the liquid medicine amount in the connecting part is, the less the total amount of the liquid medicine is used, and the liquid medicine amount contacting the human tissues is not influenced. The inner diameter of the connecting part is reduced, so that the use amount of the liquid medicine can be reduced. Preferably, the connecting portion has a bushing therein. Or the tube wall thickness of the connecting part is larger than that of the blood vessel separating part.

In some embodiments, the inner wall of the blood vessel separation part is provided with a liquid guiding groove. The liquid guide groove is used for guiding the liquid medicine to go out. When the blood vessel penetrates into the tube body and penetrates out of the through hole, the blood vessel basically fills the space between the tube body and the through hole, and the liquid guide groove is arranged to guide the liquid medicine tube to flow out of the tube body. The liquid guide groove is arranged at the section from the through hole to the blade, can guide most of liquid medicine to flow out from the blade end, and is favorable for the liquid medicine to be gathered to the stress concentration part. The liquid medicine flows out evenly, and the vein is wrapped in the liquid medicine, so that the functions of anaesthetizing and separating blood vessels and surrounding tissues are achieved, and the latent direction of the catheter body can be guided.

In some embodiments, the tubular body is a one-piece stainless steel tube. Or the pipe body is a plastic pipe, and the cutting edge is a metal cutting edge partially embedded in the plastic pipe. The plastic pipe has good self-lubricating property and smoothness, is not easy to crush or cut blood vessels, and has lower cost compared with the metal pipe.

Hand-held terminal

The hand-held end is used for connecting the handle or is provided with the handle.

In some embodiments, the hand-held end includes a handle 201 connected to the tube, the handle having a fluid passage communicating with the lumen of the tube, and a fluid injection port 202 located in the handle, as shown in fig. 7. The liquid medicine injection pump or the injector is connected with the liquid medicine injection interface, and the liquid medicine enters the liquid medicine conveying flow passage through the liquid medicine passage and reaches the human body.

In some embodiments, the handle has a connecting portion comprising a plurality of clamps 203 and a nut 204, the clamps being spaced apart from one another, the clamps defining a space for allowing insertion of the tubular body, the clamps having an externally threaded clamp 203 that engages the nut 204 to lock the tubular body between the clamps, as shown in figures 8, 9 and 10. The mode of leading to the screw thread pair makes anchor clamps draw together each other, and the handle of a model just can be convenient for cooperate the body of different specifications. The length or the external diameter of the pipe body are different, and the pipe body is of different specifications.

One-way valve

Detailed description of the preferred embodiments

These illustrations are merely exemplary of how the present invention may be implemented and are not intended to limit the present invention in any way.

Example 1

As shown in fig. 1 and 2, the single-tube single-cavity vein stripper is provided with only one tube body 1, an inner cavity penetrating through the tube body in the axial direction is formed in the tube body, one end of the tube body is a handheld end 2, and the other end of the tube body is a blood vessel separation part 3; the inner cavity of the tube body is used as a liquid medicine conveying flow passage which is communicated with a liquid medicine injection interface; the blood vessel separating part 3 comprises a blade 3011 at the end of the tube body and a through hole 3021 penetrating through the tube wall. The blood vessel separation part comprises a flaring section 301 and a cylindrical section 302, the flaring section 301 and the cylindrical section 302 are in smooth transition, a through hole 3021 is formed in the cylindrical section 302, the flaring section 301 is arranged in front of the cylindrical section 302, a cutting edge 3011 is positioned at the end of the flaring section 301, and the flaring section 301 is in a bell mouth shape. The inner wall of the through hole is passivated or the inner wall of the through hole is provided with a blade, and the blade is positioned on the front wall of the through hole. Forward of the section near the flaring. The cross-sectional area of the through hole is larger than that of the blood vessel separating part. The hand-held end of the tube body is fixed with the handle, the liquid medicine injection port is positioned on the handle, a liquid medicine channel is arranged in the handle, and the liquid medicine channel is communicated with the inner cavity of the tube body.

In this embodiment, all the structures of the foregoing embodiments can be adopted except that only one pipe is limited.

When the vein stripper is used for operation, a doctor cuts a small opening on the skin surface of the groin of a patient, finds out and cuts off a target vein, and two fractures of the vein are respectively tied. Then the vein in the direction of the lower limb is pulled out of the head, enters from the flaring section of the vessel separator, is pulled out from the through hole of the cylindrical section and keeps the head of the vein outside the body. Then, the incision of the skin is pressed, so that a closed space is formed in the body. The tube body is pushed into the body along the vein to be stripped, and the swelling liquid is injected into the body according to the requirement. The tumescent fluid enters the enclosed space and the fluid-filled location bulges. The body impels forward, and the cutting edge cuts off the vein and is connected rather than the tissue of circumference, and with the cutting edge contact, but form the stress concentration district between the tissue of circumference that has not been separated yet and the vein, the swelling liquid preferentially concentrates to the stress concentration district, under the effect of swelling liquid, weakens in the tissue of circumference is connected with the vein, realizes vein and peels off along with the cutting effect of cutting edge. Simultaneously, the swelling liquid is concentrated to the stress concentration district, also is the direction is instructed for the marcing of body. In the whole operation process, the liquid medicine is injected for 2-3 times according to actual needs, and the liquid medicine has the local anesthesia function at the same time. Thus, the single-tube single cavity realizes the blood vessel separation and the liquid medicine delivery.

When the wall of the through hole is completely passivated, if the blood vessel is required to be cut off, the tube body is slightly deflected and moves forwards, and then the blood vessel can be cut off. The passivated through hole wall can not cut, crush and cut off the blood vessel. When the operation of varicose vein treatment is performed, the connection between the target vein and the side branch vein is cut off, and the target vein is not necessarily cut off and taken out.

When the through hole has the blade, the tube body is withdrawn backwards after reaching the designated position, the blade at the front part of the through hole cuts off the blood vessel when the tube body is withdrawn backwards, and the tube body is withdrawn from the human body carefully after the blood vessel is taken out. The perfect blood vessel without incised wound and extruded wound can be used as vein graft.

Example 2

Vein stripper, including the body that is used for denudating the blood vessel, body one end is blood vessel separation portion, the other end is for holding the end, blood vessel separation portion is including the cutting edge that is located the body end and the through-hole that runs through the pipe wall, blood vessel separation portion includes flaring section 301 and cylinder section 302, flaring section 301 and cylinder section 302 smooth transition, through-hole 3021 sets up in cylinder section 302, flaring section 301 is before cylinder section 302, cutting edge 3011 is located the end of flaring section 301, flaring section 301 is along the arc line of abduction from cylinder section 302 to the front flaring, as shown in fig. 2 and 3. Viewed in axial cross section, the line between the two end points of the flared section is below the arc of the flared section.

Therefore, the cutting edge at the end of the flaring section and the axis of the pipe body form a certain included angle. When the tube body is pushed forward, the blood vessel in front of the blade is larger than the blood vessel in the blood vessel separating part. At the moment, the flared section enables the blade and the expanded blood vessel to form an included angle and a distance, and the blade is prevented from accidentally cutting and cutting the vein. But as the tube body advances, the blade can cut off the connection between the target vein and the side branch vein and can also complete the separation and cutting tasks.

In this embodiment, the structures described in all the previous embodiments can be adopted for the remaining structures except that the section defining the flaring of the through hole is gradually enlarged along the arc line. In this embodiment, how many cannulas the vein stripper specifically includes is not limited, and only the flaring mode of the tube body for stripping the blood vessel is limited.

Example 3

The vein stripper comprises a tube body for stripping blood vessels, wherein one end of the tube body is a blood vessel separation part, the blood vessel separation part is provided with a through hole penetrating through the wall of the tube, and the wall of the through hole is passivated, as shown in figures 4 and 5. The passivated through hole wall can not cut and cut off the blood vessel.

The wall of the through hole is a plane, and the adjacent edges of the through hole are in arc transition. When the through hole is machined, the cutting edge enters from the direction perpendicular to the pipe body, the cutting edge feeds to the center of the pipe body along an arc path, after the cutting depth reaches the position, the cutting edge feeds along a straight line, then the cutting edge feeds to the outside of the pipe body along the arc path, and the cutting edge leaves from the direction perpendicular to the pipe body. Therefore, the hole wall of the through hole can be flat. The planar hole wall is convenient for passivation treatment.

When the vein stripper is used for operation, no matter the tube body advances, the back end or inclines, the through hole can not cut the vein.

In this embodiment, the structures described in all the previous embodiments may be adopted for the remaining structures except for defining the via passivation. In this embodiment, it is not limited how many cannulas the vein denuder specifically includes, but only the passivation of the through hole of the tube body for denuding the blood vessel.

Example 4

The vein stripper comprises a tube body for stripping blood vessels, wherein one end of the tube body is a blood vessel separating part, the blood vessel separating part is provided with a through hole penetrating through the tube wall, and the front end wall of the through hole is provided with a blade, as shown in figure 6. When the vein stripping operation is performed, the tube body is moved to a preset position and is withdrawn backwards, the blade of the through hole cuts off the blood vessel, the blood vessel is taken out, and the tube body is withdrawn from the human body. The distal end during operation is used as the anterior, and the proximal end is used as the posterior.

The wall of the through hole is a plane, and the adjacent edges of the through hole are in arc transition. When the through hole is machined, the cutting edge enters from the direction perpendicular to the pipe body, the cutting edge feeds to the center of the pipe body along an arc path, after the cutting depth reaches the position, the cutting edge feeds along a straight line, then the cutting edge feeds to the outside of the pipe body along the arc path, and the cutting edge leaves from the direction perpendicular to the pipe body. Therefore, the hole wall of the through hole can be flat.

The walls of the through-hole except the front end wall are passivated. When the blood vessel penetrates out, the wall of the through hole is prevented from cutting the blood vessel, the integrity of the blood vessel is kept, and no cut is generated due to the through hole. When the through hole is passivated, the blood vessel is cut off by controlling the advancing angle of the tube body when necessary by means of the blade of the blood vessel separating part. In the case of a varicose vein operation, the separated vein may be cut and then withdrawn. Or the blood vessel separation part can be directly withdrawn without cutting off the blood vessel after running in place and cutting off the connection of the target blood vessel and the side branch thereof. After the target blood vessel is cut off from the side branch blood vessel, no blood vessel delivers blood to the target blood vessel, and the target blood vessel with varicose veins naturally shrinks, thereby achieving the purpose of treating varicose veins.

Or when the through hole is processed, the cutting edge is cut in from an oblique direction, and is fed forwards along the arc line, and then is separated from the pipe body in an oblique direction. The hole wall of the bevel of the through hole processed in the way is equivalent to a blade and can be used for cutting off blood vessels. The front end wall and the rear end wall of the through hole are both inclined planes, but the inclined planes of the rear end wall are parallel to the blood vessel, so that the blood vessel is not cut.

In this embodiment, the structure described in all the embodiments can be adopted as the remaining structure except for the edge of the front end wall defining the through hole. In this embodiment, it is not limited how many cannulas the vein denuder specifically includes, but only the front end wall of the through hole of the tube body for denuding the blood vessel has a blade for cutting off the blood vessel.

Example 5

vein stripper, including being used for peeling off the vascular body, body one end is vascular separation portion, and the internal diameter lower limit of vascular separation portion is 2mm, and the external diameter upper limit is 10 mm.

The body divide into blood vessel separation portion, connecting portion and handheld end, and connecting portion are located between blood vessel separation portion and the handheld end, and the external diameter of connecting portion equals with the external diameter of blood vessel separation portion. The blood vessel separation part comprises an expanding section and a cylindrical section, the outer diameter of the connecting part is equal to that of the cylindrical section, and the inner diameter of the connecting part is equal to that of the cylindrical section. The pipe body is a stainless steel pipe, and the flaring section is formed by stamping at one end of the pipe body. The surface of the flaring section is ground to form a blade.

The area of the through hole is larger than the radial sectional area of the blood vessel separating part. The cutting depth of the through hole accounts for half of the diameter of the pipe body. The through holes are formed by cutting off a part of the pipe wall from the radial direction, and the radial dimension of the cut-off pipe wall is used as the cutting depth. The through hole is used for penetrating out the blood vessel from one side of the tube body, so that the blood vessel can conveniently penetrate out according to the size of the through hole, and extrusion injury caused by the through hole are avoided. The through hole can also be used for passivating the hole wall, so that the cutting of blood vessels is avoided.

In this embodiment, the structures described in all the embodiments can be adopted as the remaining structures except that the outer diameter and the inner diameter of the blood vessel separating portion are defined so as to be suitable for the great saphenous vein. In this embodiment, it is not limited how many cannulas the vein stripper specifically includes, but only the size of the blood vessel separation portion on the tube body for stripping the blood vessel is limited to be capable of fitting the great saphenous vein.

The utility model shown and described herein may be implemented in the absence of any element, limitation, or limitations specifically disclosed herein. The terms and expressions which have been employed are used as terms of description and not of limitation, and there is no intention in the use of such terms and expressions of excluding any equivalents of the features shown and described or portions thereof, and it is recognized that various modifications are possible within the scope of the invention. It should therefore be understood that although the present invention has been specifically disclosed by various embodiments and optional features, modification and variation of the concepts herein described may be resorted to by those skilled in the art, and that such modifications and variations are considered to be within the scope of this invention as defined by the appended claims.

The contents of the articles, patents, patent applications, and all other documents and electronically available information described or cited herein are hereby incorporated by reference in their entirety to the same extent as if each individual publication was specifically and individually indicated to be incorporated by reference. Applicants reserve the right to incorporate into this application any and all materials and information from any such articles, patents, patent applications, or other documents.

Claims

1. Vein stripper, its characterized in that: the vein stripper is provided with only one tube body, one end of the tube body is provided with a handheld end, the other end of the tube body is a blood vessel separation part, the handheld end is provided with a liquid medicine injection interface, and an inner cavity of the tube body is used as a liquid medicine conveying flow passage; the blood vessel separation part comprises a cutting edge and a through hole penetrating through the tube wall, the blood vessel separation part is provided with a flaring section, the cutting edge is positioned at the end part of the flaring section, the flaring section is formed by gradually flaring a plurality of rows of circular rings from a cylindrical section along an outward-flaring arc line, the hole wall of the through hole is passivated, and the area of the through hole is larger than the minimum radial sectional area of the blood vessel separation part.

2. The vein stripper of claim 1, wherein: the blood vessel separation part is provided with a cylindrical section, the inner diameter of the cylindrical section of the blood vessel separation part is 3.5-5 mm after the flaring section, and the outer diameter of the cylindrical section of the blood vessel separation part is 4.3-5.8 mm.

3. The vein stripper of claim 2, wherein: the through hole is arranged on the cylindrical section; or the through hole is arranged at the flaring section; or one part of the through hole is positioned in the flaring section, and the other part of the through hole is positioned in the cylindrical section.

4. The vein stripper of claim 1, wherein: the body divides into blood vessel separation portion, connecting portion and handheld end, and connecting portion are between blood vessel separation portion and handheld end, and the external diameter upper limit of connecting portion is 10 mm.

5. The vein stripper of claim 4, wherein: the diameter of the connecting part is equal to that of the cylindrical section of the blood vessel separating part, and the diameter comprises an inner diameter and an outer diameter; or the outer diameter of the connecting part is equal to the outer diameter of the cylindrical section of the blood vessel separation part, and the inner diameter of the connecting part is smaller than the inner diameter of the cylindrical section of the blood vessel separation part; or the connecting part is a transition section and a cylindrical section, the transition section is arranged between the blood vessel separating part and the cylindrical section of the connecting part, and the diameter of the cylindrical section of the connecting part is smaller than that of the cylindrical section of the blood vessel separating part.

6. The vein denuder of one of claims 1-5 wherein: the cutting depth of the through hole accounts for half of the diameter of the pipe body.

7. The vein stripper of claim 6, wherein: the hole wall of the far-end of the through hole is provided with a blade.

8. The vein stripper of claim 1, wherein: the body is the stainless steel pipe of integral type.

9. The vein stripper of claim 1, wherein: the pipe body is a plastic pipe, and the cutting edge is a metal cutting edge partially embedded into the plastic pipe.

10. The vein stripper of claim 1, wherein: the liquid medicine injection interface is connected with the one-way valve.