Venous cavity closing deviceTechnical Field
The invention relates to the technical field of medical appliances, in particular to a venous cavity closing device.
Background
Varicose veins of the lower extremities are common diseases in surgery, which are usually caused by venous valve insufficiency, leading to venous return. At present, the methods for treating varicose veins mainly comprise high-level ligation and suction stripping operation, laser/radio frequency ablation, foam hardener treatment and venous gel (biological gel or tissue gel) treatment, and the methods have the advantages and disadvantages respectively, for example, the high-level ligation and suction stripping operation has thorough treatment, but the surgical injury is large, the scars are more, the recurrence rate is high, the heat treatment technologies such as laser or radio frequency ablation have good closing effect, but the damage to skin and saphenous nerves is easy, and the thin varicose veins or the varicose veins with buckling clusters cannot be treated, the foam hardener treatment is not thorough enough, especially the treatment effect on the thick varicose veins is poor, the recurrence rate is high, chang Jifa thrombophlebitis is not needed, the venous gel treatment does not need general anesthesia and has no thermal injury, but the treatment effect depends on biological gel preparations, and the treatment effect is poor for the thicker blood vessels.
Accordingly, there remains a need for improved devices and methods to mitigate or eliminate the adverse effects of current varicose vein therapies.
Disclosure of Invention
The invention aims to provide a venous cavity closing device which aims to solve the technical problems existing in the existing varicose vein treatment mode.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The invention provides a venous cavity closing device which comprises a handle, and a catheter and a cable assembly which are respectively connected with the handle;
The catheter comprises a coil section and a non-coil section, wherein a plurality of sections of heating wires are arranged outside the coil section, each section of heating wire has a preset distribution length, and a space is formed between every two adjacent heating wires;
An adhesive injection mechanism is arranged in the handle and is used for injecting adhesive into the vein cavity through the catheter.
Optionally or preferably, the coil section comprises a PI pipe, a supporting PEEK pipe, an FEP heat shrinkage pipe and a ball head, wherein the supporting PEEK pipe is sleeved outside the PI pipe, the ball head is arranged at the front ends of the PI pipe and the supporting PEEK pipe, a plurality of sections of heating wires are sequentially wound outside the supporting PEEK pipe, and the FEP heat shrinkage pipe is sleeved outside a plurality of sections of heating wires;
The non-coil section comprises a PI pipe and a ring-printed PEEK pipe sleeved outside the PI pipe, one end of the ring-printed PEEK pipe is connected with the tail end of the supporting PEEK pipe, and scale marks are arranged on the outer surface of the ring-printed PEEK pipe.
Optionally or preferably, the multiple sections of heating wires are wound outside the support PEEK tube in a double-row parallel winding mode;
The PEEK support tube is characterized in that a plurality of groups of single-side holes are formed in the PEEK support tube, each group of single-side holes comprises two single-side holes, the two single-side holes in each group of single-side holes are arranged at different positions in the circumferential direction of the PEEK support tube, the single-side holes among the groups are distributed in a staggered manner in the circumferential direction of the PEEK support tube, and two tail ends of each heating wire pass through the corresponding single-side holes in the corresponding groups respectively and are arranged in a gap between the PEEK support tube and the P I tube.
Through being provided with unilateral hole near every section heater terminal department on supporting PEEK pipe to make the heater terminal that double set up pass unilateral hole respectively and get into supporting PEEK intraductal, can avoid increasing the diameter of pipe under the prerequisite that is provided with multistage heater strip.
Optionally or preferably, the multi-section heating wire comprises a first section heating wire, a second section heating wire and a third section heating wire which are sequentially arranged, wherein the first section heating wire is wound on one side of the supporting PEEK tube far away from the handle, and a thermocouple temperature sensing head is arranged in the first section heating wire.
Optionally or preferably, a PCB board is arranged in the handle, and the multi-section heating wire and the thermocouple temperature sensing head are respectively and electrically connected with the PCB board;
The handle is provided with a via hole, and a button sleeve is arranged in the via hole and used for triggering a micro button switch on the PCB;
One end of the second section heating wire is connected with one end of the first section heating wire, and the other end of the second section heating wire is connected with one end of the third section heating wire.
Optionally or preferably, the adhesive injection mechanism comprises an adhesive chamber, an adhesive injection assembly, and a hose;
one end of the hose is communicated with the adhesive bin, and the other end of the hose is communicated with the guide pipe after passing through the adhesive injection assembly.
Optionally or preferably, the adhesive injection assembly comprises a knob, a turntable portion and a fixed seat;
the knob comprises a screwing cap and a screwing rod, and a plurality of first convex clamping blocks are symmetrically arranged on the side wall of the lower part of the screwing rod;
The rotary table part comprises a disc and a receiving column arranged on the lower end surface of the disc, wherein the receiving column is provided with a connecting hole with a waist-shaped section;
the screwing rod passes through the connecting hole, and the plurality of first protruding clamping blocks can be clamped with the plurality of first gaps under the action of external force;
The knob and the turntable part are rotatably arranged in the fixed seat through the bearing column;
the upper end face of the disc is provided with a plurality of convex columns, and the hose is arranged in the spaces of the outer sides of the convex columns and the inner sides of the fixing seats.
Optionally or preferably, a spring is sleeved on the screwing rod, a convex ring is arranged on the side wall of the screwing cap, a plurality of second convex clamping blocks are symmetrically arranged on the convex ring, and the second convex clamping blocks and the first convex clamping blocks are staggered in the circumferential direction;
the handle shell is internally prevented from being provided with an annular protruding part facing the inside, and a plurality of second notches are symmetrically arranged on the annular protruding part;
When the spring is in an uncompressed state, the plurality of second protruding clamping blocks are clamped with the plurality of second gaps, and the plurality of first protruding clamping blocks are positioned in the connecting hole;
when the spring is in a compressed state, the plurality of first protruding clamping blocks are clamped with the plurality of first notches.
According to the invention, the knob is rotated to drive the turntable part to rotate together, so that the adhesive in the hose is pressed into the P I pipe under the extrusion of the plurality of convex columns and the inner wall of the fixed seat, finally flows out of the front end of the P I pipe, acts on the target treatment position to adhere the diseased vein, and can be in an unlocking/locking state by pressing/releasing the knob, thereby being convenient for an operator to control the extrusion of the adhesive.
Optionally or preferably, a hose closing mechanism is further provided between the adhesive chamber and the adhesive injection assembly;
The hose closing mechanism comprises a screw, a transverse through hole and a longitudinal through hole, wherein the transverse through hole is communicated with the longitudinal through hole;
The inner surface of the longitudinal through hole is provided with threads, and the screws are in threaded connection with the longitudinal through hole and are used for controlling the on-off of the hose in the transverse through hole.
Optionally or preferably, the adhesive chamber comprises an adhesive injection port, an air inlet port, and an air outlet port;
The adhesive injection port for injecting adhesive therethrough into the adhesive plenum;
The air inlet is used for providing a smooth atmosphere passage in the process of injecting the adhesive by the adhesive injection assembly;
the exhaust port is used to provide a smooth atmosphere path during injection of the adhesive into the adhesive plenum.
Based on the technical scheme, the invention at least has the following technical effects:
The venous cavity closing device integrates the radio frequency closing function and the adhesive treatment function, can fully utilize the advantages of the two operations, can realize better closing effect for saphenous veins with larger diameters and veins with smaller diameters (such as traffic branches), and widens the use scenes;
The multi-section heating wire coils wound outside the coil sections enable the shorter coils to be used for small-range ablation closing independently in the process of radio frequency ablation closing, and the multi-section heating wire coils can be used for large-range ablation closing;
the number of wire harnesses positioned in a cavity between the P I pipe and the supporting PEEK pipe can be reduced by designing the connection mode of the lines of the multi-section heating wires, namely the wire ends and the ends, so that the diameter of the catheter is prevented from being increased;
through seting up single side hole in the end department that is close to every section heater strip on supporting PEEK pipe, can avoid increasing the diameter of pipe under the prerequisite that is provided with multistage heater strip.
Drawings
FIG. 1 is a schematic view of the overall structure of the venal cavity closure device of the present invention;
FIG. 2 is a schematic view of the structure of a catheter coil segment in the venal cavity closure device of the present invention;
Fig. 3 is a partial enlarged view of a portion a in fig. 2;
fig. 4 is a partial enlarged view of a portion B in fig. 2;
FIG. 5 is a cross-sectional view of a catheter coil segment in the venal cavity closure device of the present invention;
FIG. 6 is an enlarged view of a portion C of FIG. 1;
FIG. 7 is a circuit connection diagram of a multi-segment heating wire in the vena cava closure device of the invention;
FIG. 8 is a schematic view of the adhesive injection mechanism of the venal cavity closure device of the present invention;
FIG. 9 is a schematic view of an adhesive injection assembly (with the upper cover of the holder omitted) in the venal cavity closure device of the present invention;
FIG. 10 is a schematic view of the structure of a knob in the venal cavity closing device of the present invention;
FIG. 11 is a bottom view of a knob in the venal cavity closure device of the present invention;
FIG. 12 is a schematic view of the structure of the turntable portion of the vena cava closure device of the invention;
FIG. 13 is a bottom view of the dial portion of the venal cavity closure device of the present invention;
FIG. 14 is a schematic view of the assembly of the knob and handle of the venal cavity closure device of the present invention;
FIG. 15 is a schematic view of the overall structure of the handle of the venal closure device of the present invention;
FIG. 16 is a schematic view of the overall structure of the handle of the venal closure device of the present invention;
FIG. 17 is a cross-sectional view of the handle of the venal cavity closure device of the present invention;
fig. 18 is a partial enlarged view of a portion D in fig. 17.
100, A catheter, 110, a coil section, 111, P I, 112, a supporting PEEK tube, 113, a heating wire, 1131, a first heating wire, 1132, a second heating wire, 1133, a third heating wire, 114, a ring-printed PEEK tube, 115, a single-sided hole, 116, a thermocouple temperature sensing head, 117, a FEP heat shrinkage tube, 118, a ball head, 120, a non-coil section, 200, a handle, 210, an adhesive injection mechanism, 211, an adhesive bin, 212, an adhesive injection assembly, 213, a hose, 214, an adhesive injection port, 215, an air inlet, 216, an air outlet, 217, a knob, 2171, a screw cap, 2172, a screw rod, 2173, a bulge loop, 2175, a first bulge clamp, 2174, a second bulge clamp, 218, a spring, 219, a turntable portion, 2191, a disc, 2192, a receiving post, 2193, a connecting hole, 2194, a first notch, 2195, a boss, 2110, a fixing base, 220, a plate, 230, a ring-shaped bulge, 231, a second button, 241, a wire clamp, 240, a horizontal cable assembly, a horizontal notch, a cable assembly, and a cable assembly.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without making any inventive effort are within the scope of the present invention.
Examples
Referring to fig. 1, a venous lumen closure device includes a handle 200, a catheter 100, and a cable assembly 300, wherein one end of the catheter 100 is connected to the handle 200, the other end acts on a surgical site, and one end of the cable assembly 300 is connected to the handle 200, and the other end is connected to a host.
Referring to fig. 2 to 6, in the present embodiment, the catheter 100 includes a coil section 110 and a non-coil section 120, wherein the coil section 110 is disposed at a front end portion of the catheter 100, and includes a P I tube 111, a support PEEK tube 112 sleeved outside the P I tube 111, and an oval bulb 118 disposed at a front end of the coil section 100, and a plurality of heating wires 113 are wound around the support PEEK tube 112, and the heating wires 113 are connected to an energy host through a handle 200 and a cable assembly 300 for performing radio frequency treatment on an operation site.
In order to improve the treatment effect on veins with different lengths, in the embodiment, the treatment with different lengths and ranges is realized by arranging the multi-section heating wire 133, the multi-section heating wire 133 is sequentially a first-section heating wire 1131, a second-section heating wire 1132 and a third-section heating wire 1133, and it can be understood that an operator can realize at least three using modes through the multi-section heating wire 133 in the embodiment by respectively independently using the first-section heating wire 1131, combining the first-section heating wire 1131 with the second-section heating wire 1132, combining the first-section heating wire 1131, combining the second-section heating wire 1132 with the third-section heating wire 1133.
Because the vein intracavity radio frequency closing operation is carried out in a mode of retracting a catheter while burning, when the catheter with a section of heating wire is adopted for treatment, the common problem is that when the catheter is retracted to the tail end of a varicose vein, the varicose vein with the length of 2-3cm still needs to be treated, but if the heating wire with the length of 7cm is continuously adopted for burning, excessive damage is caused to burnt tissues, or the heating wire possibly can be withdrawn from a wound and cannot meet the safety requirement of the operation, therefore, the current practice is to discard the treatment of the rest 2-3cm varicose vein, or replace the catheter with the heating wire with the shorter length, but the multi-section heating wire adopting the scheme can be directly switched to the burning of the rest 2-3cm varicose vein with the first section of heating wire, so that the treatment is more thorough, and the closing catheter with different specifications does not need to be replaced in the operation, and the operation time is saved.
Compared with the arrangement of single-section heating wires, in the embodiment, in order to avoid the increase of the diameter of the catheter 100, the multi-section heating wires 113 are wound around the outer part of the support PEEK tube 112 in a double-row and winding manner, two single-side holes 115 with a certain interval are arranged on the PEEK support tube corresponding to the tail end position of each section of heating wire 133, the tail ends of the heating wires 133 arranged in double rows respectively pass through the two single-side holes 155 and penetrate into the support PEEK tube 112 and are finally connected with the inner part of the handle 200, and three groups (two groups) of single-side holes 115 are arranged on the support PEEK tube 112 in total due to the three sections of heating wires 133, and the three groups of single-side holes 115 are distributed in a staggered manner on the circumference of the support PEEK tube 112.
Because the two staggered unilateral holes 115 are arranged at the tail end of each section of heating wire 133, the condition that the two tail ends of each section of heating wire 113 enter from the same unilateral hole 115 (the pipe diameter of the supporting PEEK pipe 112 is required to be increased at the moment) is avoided, the gap between the supporting PEEK pipe 112 and the PI pipe 111 is fully utilized, and the diameter of the whole catheter 100 is not increased compared with that of a catheter of a one-section heating wire.
It should be noted that the end of the third section of heating wire 1133 may not penetrate into the support PEEK tube 112 through the single-sided hole 115, but may extend directly back into the ring-printed PEEK tube 114 through the outside of the support PEEK tube.
In addition, since the wires of the multi-stage heating wire 113 extend back into the handle 200 around the P I pipe 111, the connection mode of the wires of the heating wire 113 is designed in this embodiment in order to avoid the increase of the diameter of the non-coil section 120 due to the increase of the wires.
Referring to fig. 7, specifically, two wire ends of the first section heating wire 1131 are a1、a2 respectively, two wire ends of the second section heating wire 1132 are b1、b2 respectively, two wire ends of the third section heating wire 1133 are c1、c2 respectively, b1 is connected with c1, b2 is connected with c2, a1、a2、c1、c2 extends backwards and is electrically connected with the PCB 220, and therefore 6 wires are combined into 4 wires in the ring-printed PEEK tube, so that the increase of the diameter of the non-coil section 120 is avoided.
Referring to fig. 14 and 17, in this embodiment, the PCB 220 is fixed on the upper case of the handle 200, the end of the multi-section heating wire 133 is welded on the PCB 220, a via hole is provided on the upper case of the handle 200, a button sleeve 250 is provided in the via hole, and the micro button switch on the PCB can be indirectly started by pressing the button sleeve 250, so as to realize the start and stop of the energy output of the rf closed catheter in the venous cavity, and in addition, an indicator lamp is further provided on the PCB 220, so that the lamp can flash to remind the operator when the energy is excited.
With continued reference to fig. 2 and 3, in this embodiment, a thermocouple temperature sensing head 115 is further disposed between the first heating wires 1131, and extends from the gap between the support PEEK tube 112 and P I tube 111 through a small hole, and finally is clamped in the double-row parallel winding heating wires, and an insulating layer is also disposed outside the thermocouple wires and electrically connected to the PCB 229 through the wires.
In this embodiment, the multi-section heating wire 113 and the thermocouple temperature sensing head 115 are bonded and supported on the PEEK pipe 112 through UV glue, and the FEP heat shrinkage pipe 117 is sleeved outside the multi-section heating wire 113.
In this embodiment, the non-coil section 120 includes a ring-printed PEEK tube 114, wherein the ring-printed PEEK tube 114 is sleeved on the outer side of the end of the supporting PEEK tube 112 and is fixed by UC glue. The outer surface of the ring-printed PEEK tube 114 is provided with graduation marks.
In this embodiment, P I tube 111 is used as a guide wire channel and an adhesive injection channel, and is disposed in support PEEK tube 122 and extends into ring-printed PEEK tube 114, the end of P I tube 111 passes through ring-printed PEEK tube 114 and enters into handle 200, and is communicated with the guide wire inlet on handle 200 and adhesive injection mechanism 210, the joint is sealed by UV glue, in addition, oval bulb 118 at the front end of coil section 100 is molded by UV glue, which is used for fixing PI tube 111 and support PEEK tube 112, and oval bulb 118 can avoid damage to blood vessel caused by the front end of catheter 100.
The venous cavity closing device integrates the radio frequency closing function and the adhesive treatment function, so that the use scene is widened, and a better treatment effect is achieved.
Referring to fig. 8 to 18, in the present embodiment, an adhesive injection mechanism 210 is further disposed in the handle 200, and the adhesive injection mechanism 210 can inject the adhesive into the vein lumen through the catheter 100.
Specifically, the adhesive injecting mechanism 210 includes an adhesive chamber 211, an adhesive injecting assembly 212 and a hose 213, wherein the adhesive chamber 211 includes an adhesive inlet 214, an air inlet 215 and an air outlet 216, and in actual operation, the adhesive is injected into the adhesive chamber 211 through the adhesive inlet 214, wherein the air outlet 216 facilitates smooth injection of the adhesive into the adhesive chamber 211, and the air inlet 215 facilitates smooth discharge of the adhesive from the adhesive chamber 211. The adhesive chamber 211 may be fixedly disposed in the handle 200 or may be detachably disposed in the handle 200.
The adhesive injection assembly 212 comprises a knob 217, a spring 218, a turntable part 219 and a fixing base 2110, wherein the knob 217 comprises a screwing cap 2171 and a screwing rod 2172, a convex ring 2173 is arranged on the lower side wall of the screwing cap 2171, two second convex clamping blocks 2174 are symmetrically arranged on the convex ring 2173, two first convex clamping blocks 2175 are symmetrically arranged on the lower side wall of the screwing rod 2172, and the two second convex clamping blocks 2174 and the two first convex clamping blocks 2175 are staggered in the circumferential direction.
It should be noted that fig. 9 shows a schematic structural view of the adhesive injection assembly, and the upper cover portion of the fixing base 2110 is omitted to embody the internal structure of the adhesive injection assembly, and in general, the upper end of the spring 218 abuts against the lower portion of the knob 217, and the lower end of the spring 218 abuts against the upper cover of the fixing base 2110.
The turntable 219 includes a disc 2191, a hollow receiving post 2192 is disposed on a lower end surface of the disc 2191, the receiving post 2192 is a hollow connecting hole 2193 with a oval cross section, two symmetrical first notches 2194 are disposed on a bottom side surface of the receiving post 2192, bearings are disposed outside a middle portion of the receiving post 2192, and the disc 2191 is rotatably connected to the fixing base 224 through the receiving post 2192 and the bearings disposed on the receiving post 2192.
Meanwhile, four protruding columns 2195 are further arranged on the upper end face of the disc 2191, one end of the hose is communicated with the adhesive bin 211, and the other end of the hose is wound along the outer sides of the four protruding columns 2195 and finally communicated with the PI pipe 111.
In this embodiment, an annular protrusion 230 is disposed on the inner surface of the upper case of the handle 200, two second notches 231 are symmetrically disposed on the annular protrusion 230, when the operator does not press the knob 217 downward, i.e. when the spring 218 is in an uncompressed state, the two second protruding clamping blocks 2174 are engaged with the second notches 231, the first protruding clamping blocks 2175 are located inside the kidney-shaped connecting hole 2193, when the operator presses and rotates the knob 217 downward, i.e. when the spring 218 is in a compressed state, the first protruding clamping blocks 2175 located at the lower portion of the screwing rod 2172 are engaged with the two first notches 2194 at the lower portion of the receiving post 2192, and when the knob 217 can drive the turntable 219 to rotate together, so that the adhesive in the hose 213 is pressed into the tube P I under the compression of the plurality of posts 2195 and the inner wall of the fixing base 2110, and finally flows out of the front end of the tube 111 to act on the target treatment site, thereby bonding the vein of the lesion.
In addition, in order to avoid that the adhesive overflows from the hose 213 when the adhesive is replenished into the adhesive chamber 211 through the adhesive injection port 214, a hose closing mechanism 240 is further provided in the adhesive chamber 211 and the adhesive injection assembly 212 in the present embodiment.
Specifically, the hose closure mechanism 240 includes a screw 243, a transverse port 241 and a longitudinal port 242, which are in communication, the hose 213 is disposed through the transverse port 241, the inner surface of the longitudinal port 242 is provided with threads, and the screw 243 is in threaded connection with the longitudinal port 242 and acts on the hose 213 in the transverse port 241. To avoid adhesive spillage, the operator may rotate the screw 243 to the bottom while replenishing the adhesive, thereby temporarily closing the hose 213, thereby preventing adhesive spillage.
The specific usage mode of the venous lumen closing device provided by the embodiment is as follows:
(1) The radio frequency function is used alone to close the varicose vein, when the varicose vein with a smaller diameter is not present or is present in a small quantity, the radio frequency function can be used alone to close the varicose vein, specifically, the cable assembly 300 is connected with an energy host, heating wires 113 with different sections can be selected according to the length of the vein to be closed, the lengths of the first heating wire 1131 and the second heating wire 1132 are 2.5cm, and the length of the third heating wire 1133 is 3cm, therefore, the length of the varicose vein which can be treated by one-time radio frequency energy excitation can be 2.5cm, 5cm and 8cm, and compared with the traditional one-section heating wire (the heating wires are usually 3cm and 7 cm), the small range and the large range can be realized by only adopting one catheter.
(2) The adhesive is used alone to close the varicose vein when there are more varicose veins of finer diameter, specifically, the knob 217 on the handle 200 is first unlocked outside the human body, the knob 217 is rotated, the adhesive in the adhesive chamber 211 is pumped into the P I tube 111 and the air that may be present in the P I tube 111 is expelled, then the catheter 100 is inserted into the varicose vein to be treated through an incision in the human body, the knob 217 is rotated, the adhesive is injected into the varicose vein, and pressed to close the varicose vein, more specifically the adhesive application method is described herein without reference to the prior art.
(3) The radio frequency function is used first, and then the adhesive is used to close the varicose vein, and when the varicose vein with a thicker diameter exists and more varicose veins with a thinner diameter exist, the two operation modes can be used together. That is, the varicose vein with larger diameter is burned by radio frequency heating, and the rest varicose vein with smaller diameter can be closed by using an adhesive.
In actual surgery, the utility model is not limited to the above-mentioned use scenario, and the doctor can freely select the functions according to the actual situation of the patient.
In the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and include, for example, "connected to," whether fixedly connected to, detachably connected to, or integrally connected to, mechanically connected to, electrically connected to, directly connected to, indirectly connected to, and in communication with each other via an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.