CN211534411U - Control mechanism capable of simultaneously controlling two bending shapes of electrode catheter head end - Google Patents
Control mechanism capable of simultaneously controlling two bending shapes of electrode catheter head end Download PDFInfo
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- CN211534411U CN211534411U CN201921066673.1U CN201921066673U CN211534411U CN 211534411 U CN211534411 U CN 211534411U CN 201921066673 U CN201921066673 U CN 201921066673U CN 211534411 U CN211534411 U CN 211534411U
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Abstract
The utility model discloses a control mechanism capable of simultaneously controlling two types of bending of the head end of an electrode catheter, which solves the technical problem of shortening the intracardiac operation time of an operating doctor. The utility model discloses an operating device of near-end is connected with the electrode pipe, and operating device is equipped with coupling mechanism, and the coaxial cover in coupling mechanism near-end is put and is connected with push-pull control mechanism, and the coaxial cover in coupling mechanism distal end is put and is connected with rotary control mechanism, and the electrode pipe distal end is connected with circle electrode, and the annular one section of next-door neighbour's ring is the straightway, and push-pull control mechanism control straightway is crooked, the annular diameter size of rotary control mechanism control ring. Compared with the prior art, the utility model, realize the two kinds of shape bendings of ring electrode of simultaneous control electrode pipe, straightway bending degree and the stepless regulation of ring diameter size have increased the reliability that electrode pipe and heart inner wall pasted when performing the operation, have improved the degree of accuracy of intracardiac signal of telecommunication collection, shorten the operation time, reduce the operation degree of difficulty, have greatly made things convenient for the doctor that performs the operation.
Description
Technical Field
The utility model relates to a medical surgical instrument, in particular to an electrophysiological electrode catheter for cardiac intervention mapping and treatment.
Background
The electrophysiological electrode catheter (electrode catheter) has very important function in the field of cardiac electrophysiology, many intracardiac electrophysiological diagnoses need to record or collect electrophysiological signals by using the electrode catheter, along with the development of intracardiac electrophysiological science, the application of the electrode catheter is more and more extensive, and higher requirements are placed on the safety, accuracy and high efficiency of the intracardiac electrophysiological diagnoses. The intracardiac structure of human body is complicated, and there is individual difference, and the single curved structure of prior art electrode catheter or size can not once only satisfy the demand of intracardiac electrophysiological diagnosis, for example cyclic mapping electrode catheter, because intracardiac structure is complicated and individual difference, when leaning on to the pulmonary vein wall, need adopt the electrode catheter of same kind different sizes to diagnose, just can guarantee that electrode catheter is good to lean on and accurate diagnosis. The electrode catheter control structure in the prior art can only effectively keep a far-end bent shape, the attaching difficulty and the accuracy of electric signal acquisition are increased, and the operation time and difficulty of doctors are also increased.
Disclosure of Invention
The utility model aims at providing a but control mechanism of two kinds of bendings of simultaneous control electrode catheter head end, the technical problem that solve shortens operation doctor's intracardiac operation time, reduces the operation degree of difficulty.
The utility model adopts the following technical scheme: a control mechanism capable of simultaneously controlling two bending shapes of the head end of an electrode catheter is characterized in that an operating mechanism at the near end is connected with the electrode catheter, the operating mechanism is provided with a connecting mechanism, the near end of the connecting mechanism is coaxially sleeved and connected with a push-pull control mechanism, and the far end of the connecting mechanism is coaxially sleeved and connected with a rotary control mechanism; the far end of the electrode catheter is connected with a ring electrode, the far end of the ring electrode in a free state is in an open circular ring shape, and a section adjacent to the circular ring shape is a straight line section; the push-pull control mechanism moves along the axis of the connecting mechanism to control the bending of the straight line section; the rotary control mechanism rotates around the axis of the connecting mechanism to control the diameter of the circular ring.
The connecting mechanism of the utility model is provided with a cylindrical push rod, the outer edge of the middle part of the push rod protrudes outwards along the radial direction to form a circle of first bulges, and the push rod 22 is divided into a proximal part and a distal part by the first bulges;
the cylinder at the proximal part is provided with a limiting groove parallel to the axis;
the cylinder of the distal part is provided with a groove along the axial direction, two sides of the groove are positioned on the plane of the axis, the bottom edge is lower than the plane of the axis, a cylindrical sliding block is coaxially arranged in the groove, a sliding block cover is arranged on the other side of the plane of the axis, the groove and the sliding block cover form a cylindrical space for the axial movement of the sliding block, and the bottom edge of the groove and the linear edge of the sliding block cover form a long groove parallel to the axis of the cylindrical space;
the sliding block is provided with a through hole along the axis, the middle part of the sliding block is provided with two radial screw holes and through holes which are distributed in 90 degrees and are vertical to the axis, the screw holes are spirally filled with pull wire fixing columns, small shafts which protrude outwards are arranged in the through holes, the through holes which are vertical to the axis are arranged near the tail ends of the pull wire fixing columns, and the pull wire fixing columns are communicated with the axial through holes of the sliding block after being screwed into the screw holes of the sliding block; the small shaft extends out of a long groove of the cylindrical space;
the far end of the push rod is a chuck, the chuck is in a cylinder shape, four symmetrical long grooves are formed in the far end portion of the cylinder along the axis to form a chuck capable of being folded inwards, sawteeth are formed in the inner surface of the chuck along the circumferential direction, and external threads are arranged at the root of the chuck.
The outer edge of the near end of the push rod of the utility model is provided with an annular first sealing groove along the circumferential direction, and a first damping ring is embedded in the first sealing groove; one side of the far end of the groove protrudes outwards in the radial direction to form a circle of second protrusion, the outer edge of the second protrusion is provided with an annular second sealing groove in the circumferential direction, and a second damping ring is embedded in the second protrusion.
The utility model discloses a push rod adopts polyformaldehyde resin.
The push-pull control mechanism of the utility model is provided with a cylindrical handle shell, and a section of the far end of the handle shell is coaxially sleeved on the near-end part of the push rod;
the outer edge of the distal end part of the handle shell is in threaded connection with a locking nut, and the distal end part of the internal thread of the locking nut is in an internal cone shape with a small head facing the distal end; a screw hole along the radial direction is formed at the far end section of the handle shell and is screwed into a limit screw, and the limit screw extends into a limit groove of the near end part of the push rod, which is parallel to the axis;
the handle comprises a handle shell, a steel wire fixing column and a handle inner core, wherein a cylindrical handle inner core is coaxially arranged in a hole at one section of the near end of the handle shell, a through hole is formed in the handle inner core along the axial direction, a screw hole is formed in the middle of the handle inner core along the radial direction, a hole is formed in one section of a cylinder at the near end of the handle shell along the radial direction, the steel wire fixing column is screwed into the screw hole of the handle inner core through the hole, a through hole perpendicular to the axis of the steel wire fixing column is formed in.
The utility model discloses a handle shell distal end tip is equipped with annular damping circle.
The rotation control mechanism of the utility model is provided with a circle adjusting knob, the inner wall of the circle adjusting knob is provided with a double-end thread groove, and the thread groove is connected with a small shaft connected with the slide block in a sliding fit way; the ring adjusting knob is coaxially sleeved at the distal end part of the push rod and is in sliding fit connection with a cylindrical space formed by the groove at the distal end of the push rod and the slide block cover; the root of the push rod chuck is in threaded connection with a fixing nut, the distal end part of the internal thread of the fixing nut is in an inner cone shape with a small head facing the distal end, and the distal end face of the fixing nut is provided with a through hole.
The near end of the tube body of the electrode catheter of the utility model extends into the center of the four clamping heads at the far end of the push rod.
The utility model discloses an electrode catheter's pipe shaft is provided with two stay wire steel wires, the distal end of the stay wire steel wire controlling the bending of the ring electrode straight-line section is connected with the distal end part of the ring electrode straight-line section, the near end passes through the axial through hole of the handle inner core and the through hole of the steel wire fixing column, and is fixed on the push-pull control mechanism; the far end of the stay wire steel wire for controlling the diameter of the ring at the far end of the ring electrode is connected to the far end part of the ring electrode, and the near end of the stay wire steel wire passes through the axial through hole of the sliding block and the through hole of the stay wire fixing column and is fixed on the rotation control mechanism.
The utility model discloses a steel wire fixed column with the adoption aluminum alloy of the fixed column of acting as go-between, the handle inner core with the adoption polyformaldehyde resin of slider.
Compared with the prior art, the utility model, adopt push-and-pull control mechanism and rotation control mechanism, realize the curved shape of two kinds of shapes of ring electrode of simultaneous control electrode pipe, straightway bending degree and the stepless regulation of ring diameter size, the reliability that electrode pipe and heart inner wall pasted when having increased the operation has improved the degree of accuracy that intracardiac signal of telecommunication gathered, shorten the operation time, reduce the operation degree of difficulty, make the operation process safe more swift, the one hand can be operated, greatly made things convenient for the doctor that performs the operation.
Drawings
Fig. 1 is a schematic view of the present invention.
Fig. 2 is a schematic diagram of the initial state of the ring electrode of the electrode catheter of the present invention.
Fig. 3 is a schematic view of the ring electrode bending of the electrode catheter of the present invention.
Fig. 4 is a schematic structural diagram of the present invention.
Fig. 5 is an exploded view of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. As shown in fig. 1, the utility model discloses a but control mechanism (control mechanism) of two kinds of bendings of simultaneous control electrode catheter head end is equipped with the appearance for columniform coupling mechanism 2 for electrode catheter's near-end operating device, and the coaxial cover of coupling mechanism 2 near-end is put and is connected with push-pull control mechanism 1, and the coaxial cover of coupling mechanism 2 distal end is put and is connected with rotary control mechanism 3. The push-pull control mechanism 1 can move along the axis of the connecting mechanism 2, and the rotary control mechanism 3 can rotate around the axis of the connecting mechanism 2. The push-pull control mechanism 1 and the connecting mechanism 2 are connected with a ring electrode 4 at the distal end of the electrode catheter.
As shown in fig. 2, the distal end of the ring electrode 4 at the distal end of the electrode catheter is in an open circular ring shape in a free state (initial shape), and a segment of the ring electrode adjacent to the proximal end of the circular ring is in a straight line shape.
As shown in fig. 3, when the push-pull control mechanism 1 is pulled back proximally in the axial direction of the connection mechanism 2, the straight line segment of the coil electrode 4 is bent proximally, and when the push-pull control mechanism 1 is pushed distally in the axial direction of the connection mechanism 2, the straight line segment of the coil electrode 4 is straightened distally, and the original straight line shape is restored. The ratio of the pull-back distance of the push-pull control mechanism 1 to the straight line section (after the bent part is straightened) of the coil electrode 4 is 1: 1. The push-pull control mechanism 1 operates the moving distance of the push-pull control mechanism 1 within the set moving range, the straight line section of the ring electrode 4 can be adjusted to be bent randomly, the push-pull control mechanism 1 stops being pulled back or pushed at any position, and the bent shape of the straight line section of the ring electrode 4 can be fixed. For convenience of illustration, in fig. 3, the left side bending is a shape in which the straight line segment of the coil electrode 4 is bent when the push-pull control mechanism 1 is pulled back, the right side is a shape in which the straight line segment is not bent, and the size of the circular ring shape is controlled by the operation of the rotation control mechanism 3.
When the rotation control mechanism 3 is rotated in one direction around the axis of the connecting mechanism 2, the far end circle of the ring electrode 4 is inward rolled around the center of the circle, and the outer diameter of the outermost ring is reduced. The rotating radian of the rotating control mechanism 3 is within the set radian range, the ring of the ring electrode 4 can be randomly reduced or increased along with the rotating radian of the rotating control mechanism 3, the rotating control mechanism 3 is stopped to rotate at any position, and the size of the outer diameter of the outermost ring of the ring electrode 4 can be fixed.
The push-pull control mechanism 1 and the rotation control mechanism 3 can be operated by a single hand simultaneously or independently without mutual interference, so that the operation convenience is greatly improved.
As shown in fig. 4 and 5, the connecting mechanism 2 is provided with a cylindrical push rod 22, the outer edge of the middle part of the push rod 22 protrudes outwards in the radial direction to form a circle of first protrusions, the first protrusions divide the push rod 22 into a proximal part and a distal part, the proximal part is used for installing the push-pull control mechanism 1, the distal part is used for installing the rotation control mechanism 3, and the first protrusions are also used as references of the push-pull control mechanism 1 and the rotation control mechanism 3, so that a doctor can conveniently hold the push rod with hands.
The outer edge of the proximal end of the push rod 22 is circumferentially provided with an annular first sealing groove for embedding and arranging the first damping ring 21. The cylinder at the proximal part is provided with a limiting groove parallel to the axis, and a limiting screw 16 for the push-pull control mechanism 1 extends into the limiting groove to limit the axial moving range of the push-pull control mechanism 1 along the connecting mechanism 2, namely the moving range of the set ring electrode 4.
The barrel of the distal portion of the push rod 22 is axially provided with a groove (limit catch) located on one side of the plane passing through the axis (below the plane passing through the axis of the distal portion of the push rod 22 in fig. 5), the two sides of the groove are located on the plane of the axis, the bottom edge of the groove is lower than the plane of the axis, and a cylindrical slider 23 of the coupling mechanism 2 is coaxially arranged in the groove. On the other side of the transaxial plane (above the transaxial plane of the distal end portion of the push rod 22 in fig. 5), there is provided a slider cover 25, the groove and the slider cover 25 form a cylindrical space in which the slider 23 moves axially, and the bottom edge of the groove and the straight edge of the slider cover 25 form an elongated slot parallel to the axis of the cylindrical space.
The slider 23 is provided with a through hole along the axis, the middle part of the slider is provided with two radial screw holes and through holes which are distributed at 90 degrees and are vertical to the axis, the screw holes are used for being spirally arranged in the stay wire fixing columns 24, and the through holes are used for arranging small shafts which protrude outwards. A through hole vertical to the axis of the pull wire fixing column 24 is formed near the tail end of the pull wire fixing column 24, and the pull wire fixing column 24 is screwed into the screw hole of the sliding block 23 and then is communicated with the axial through hole of the sliding block 23. The small shaft extends out of the long groove of the cylindrical space, the end part of the small shaft extends into the internal thread groove of the adjusting knob 31, the periphery of the end part of the small shaft is connected with the thread groove in a sliding fit mode, the axial moving range of the sliding block 23 is limited, and the sliding block 23 can be prevented from rotating around the axis of the sliding block 23.
One side of the far end of the groove protrudes outwards along the radial direction to form a circle of second protrusion, the outer diameter of the second protrusion is the same as that of the cylindrical space, and the outer edge of the second protrusion is provided with an annular second sealing groove along the circumferential direction for embedding and arranging a second damping ring 26. The second damping ring 26 is provided between the inner wall of the ring adjustment knob 31 and the push rod 22 for increasing a frictional force between the ring adjustment knob 31 and the push rod 22, and when the rotation control mechanism 3 is stopped from being rotated, the outer diameter of the outermost ring of the ring electrode 4 is fixed via the frictional force.
The far end of the second bulge of the push rod 22 is a chuck, the chuck is in a cylinder shape, the far end part of the cylinder is provided with four symmetrical long grooves along the axis, the long grooves divide the cylinder at the end part into four pieces to form a chuck which can be folded inwards, the inner surface of the chuck is provided with sawteeth along the circumferential direction, and external threads are arranged between the root part of the chuck and the second bulge and are used for being in threaded connection with a fixing nut 32 of the rotation control mechanism 3. The push rod 22 is made of polyoxymethylene resin.
The push-pull control mechanism 1 is provided with a cylindrical handle shell 13, and a far end section of the handle shell 13 is coaxially sleeved on a near end part of a push rod 22. The distal end of the handle housing 13 is provided with an annular damping band 17. The outer edge of the distal end of the handle housing 13 is connected with a locking nut 18 by screw threads, and the distal end of the internal thread of the locking nut 18 is in an internal conical shape with a small head facing the distal end. A screw hole in the radial direction is formed on a section of the far end of the handle shell 13, and a limit screw 16 is screwed into and extends into a limit groove parallel to the axis of the near end part of the push rod 22 to limit the axial movement range of the push-pull control mechanism 1 along the connecting mechanism 2.
A cylindrical handle inner core 15 is coaxially arranged in a hole at one section of the near end of the handle shell 13, and a through hole is axially formed in the handle inner core 15 and used for allowing a pull wire to pass through. A screw hole is formed in the middle of the handle inner core 15 along the radial direction, a section of cylinder at the near end of the handle shell 13 is provided with a hole along the radial direction, the steel wire fixing column 14 is screwed into the screw hole of the handle inner core 15 through the hole, a through hole vertical to the axis of the steel wire fixing column 14 is formed near the tail end of the steel wire fixing column 14, and the steel wire fixing column 14 is screwed into the screw hole of the handle inner core 15 and then is communicated with the axial through.
The inner hole of the proximal end part of the handle shell 13 is provided with a built-in handle cover 11, and the handle cover 11 is axially provided with a through hole for the lead of the connecting ring electrode 4 to pass through.
The rotation control mechanism 3 is provided with a circle adjusting knob 31, the circle adjusting knob 31 is cylindrical, the inner wall of the circle adjusting knob 31 is provided with a double-end thread groove, the thread groove is matched with a small shaft connected with the sliding block 23, and the circle adjusting knob 31 is rotated to drive the sliding block 23 to move along the axial direction of the push rod 22. The proximal part of the cylinder of the circle adjusting knob 31 is provided with six symmetrical long grooves along the axis, so that the friction force of a user when rotating the circle adjusting knob 31 is increased, and the rotation is easier. The adjusting knob 31 is coaxially sleeved on the distal end part of the push rod 22 and forms a sliding fit connection with a cylindrical space formed by the groove at the distal end of the push rod 22 and the slider cover 25. The fixing nut 32 is connected between the root of the chuck of the push rod 22 and the second protrusion through a thread, the distal end part of the internal thread of the fixing nut 32 is in an internal cone shape with a small head facing the distal end, and the distal end surface of the fixing nut 32 is provided with a through hole. The proximal end of the retaining nut 32 defines the position of the adjustment knob 31, and the inner cone compresses the four jaws of the push rod 22, gripping the electrode catheter.
The proximal end of the tube body of the electrode catheter extends into the center of the four chucks at the distal end of the push rod 22, the fixing nut 32 is screwed, the inner cone inside the fixing nut 32 extrudes the four chucks at the distal end of the push rod 22, the four chucks deform and fold towards the axial center position, and the sawteeth on the inner surface of the chucks clamp the proximal end of the tube body of the electrode catheter, so that the connecting mechanism 2 is fixedly connected with the tube body of the electrode catheter.
Two stay wire steel wires are arranged in the tube body of the electrode catheter, one stay wire steel wire is used for controlling the straight-line section of the ring electrode 4 to be bent, and the other stay wire steel wire is used for controlling the diameter of the far end circular ring of the ring electrode 4.
The far end of the stay wire steel wire for controlling the bending of the straight section of the ring electrode 4 is welded and connected to the far end part of the straight section of the ring electrode 4 through a riveting pipe, the near end of the stay wire steel wire passes through an inner hole of a push rod 22 and an inner hole of a handle shell 13, passes through an axial through hole of a handle inner core 15 and a through hole of a steel wire fixing column 14, and the steel wire fixing column 14 is rotated to fix the stay wire steel wire. The initial curvature of the straight section of the ring electrode 4 can be adjusted by rotating the wire fixing post 14.
The far end of the stay wire steel wire for controlling the diameter of the ring at the far end of the ring electrode 4 is welded and connected with the far end part of the ring electrode 4 through a riveting pipe, the near end passes through an inner hole of a push rod 22, passes through an axial through hole of a slide block 23 and a through hole of a stay wire fixing column 24, and the stay wire steel wire is fixed on a rotary control mechanism 3 by rotating the stay wire fixing column 24. The initial diameter of the ring electrode 4 can be adjusted by rotating the pull wire fixing post 24.
The push-pull control mechanism 1 and the rotation control mechanism 3 respectively control the bending of the straight line section of the ring electrode 4 and adjust the diameter of the far end circular ring of the ring electrode 4 by controlling the axial movement of the two stay wires.
In this embodiment, the steel wire fixing post 14 and the pull wire fixing post 24 are made of aluminum alloy, and the handle inner core 15 and the slider 23 are made of polyoxymethylene resin.
The utility model discloses a working process does:
when the control mechanism is not operated, the straight line section is bent and the far end circular ring is in an initial state, at this time, the limit screw 16 is positioned at the farthest side of the limit groove of the push rod 22 (the rightmost side of the limit groove in fig. 4), and the slide block 23 is positioned at the farthest side of the limit slot of the push rod 22 (the rightmost side of the limit slot in fig. 4).
The control mechanism controls the straight line section of the ring electrode 4 to be bent, when the push-pull control mechanism 1 is pulled towards the near end and pushed towards the far end along the axial direction of the connecting mechanism 2, the push-pull control mechanism 1 and the connecting mechanism 2 generate axial relative movement, the limiting screw 16 moves in the length range of the limiting groove of the push rod 22, and the handle inner core 15 drives the pull wire steel wire for controlling the straight line section of the ring electrode 4 to be bent to generate relative displacement with the catheter tube body, so that the straight line section of the ring electrode 4 is bent.
The diameter of a far-end ring of the control mechanism overrides the ring electrode 4, when the rotation control mechanism 3 is rotated to one direction around the axis of the connecting mechanism 2, the rotation control mechanism 3 and the connecting mechanism 2 generate relative movement in the circumferential direction, the ring adjusting knob 31 is rotated, a double thread groove in the ring adjusting knob drives the sliding block 23 to move along the axis of the connecting mechanism 2 through a small shaft, the rotation of the ring adjusting knob 31 is converted into axial movement of the sliding block 23, the sliding block 23 moves in the range of a limiting clamping groove of the push rod 22, and the sliding block 23 drives a stay wire steel wire for controlling the diameter of the ring electrode 4 to generate relative displacement with a catheter tube body, so that the diameter of the ring electrode 4 is changed.
After the desired loop electrode 4 linear segment curvature and circle diameter is achieved, the surgeon stops manipulating the control mechanism and the loop electrode 4 maintains the desired loop electrode 4 linear segment curvature and circle diameter.
When the internal thread of the locking nut 18 is in threaded connection with the external thread at the far end of the handle shell 13 and is screwed, the internal taper at the far end part of the internal thread of the locking nut 18 extrudes the damping ring 17 between the locking nut 18 and the handle shell 13, so that the damping ring 17 deforms, along with the gradual increase of the deformation, the friction force between the far end inner wall of the handle shell 13 and the outer edge of the push rod 22 also gradually increases, the friction force between the inner wall of the handle shell 13 and the outer edge of the push rod 22 can be adjusted by rotating the locking nut 18, when the friction force is greater than the resilience force generated after the straight line section is bent, if an operator stops operating the control mechanism, the friction force between the handle shell 13 and the push rod 22 can keep the straight line section of the handle shell 13 and the. The first damping ring 21 is used for increasing the friction force between the handle housing 13 and the push rod 22, and after the push rod 22 is pushed to the far end, the operator releases his hand to stop operating the control mechanism, and the push rod 22 is kept from moving back to the near end.
Similarly, the second damping ring 26 is disposed between the inner wall of the ring adjusting knob 31 and the push rod 22 for increasing the friction force between the inner wall of the ring adjusting knob 31 and the push rod 22, when the friction force is greater than the resilience force generated after the reduction of the distal ring of the ring electrode 4, if the operator stops operating the control mechanism, the friction force between the ring adjusting knob 31 and the push rod 22 keeps the relative rotation between the two, and the shape of the distal ring of the ring electrode 4 is kept unchanged, so that the reduced ring is kept stable.
The utility model discloses realize the curved simultaneous control of two kinds of shapes of ring electrode of electrode catheter, straightway bending degree and the stepless regulation of ring diameter size have increased the reliability that electrode catheter and heart inner wall pasted when performing the operation and have leaned on, have improved the degree of accuracy of intracardiac signal of telecommunication collection, shorten the operation time, reduce the operation degree of difficulty, make the operation process safe swift more, provide a new solution for controlling of electrode catheter.
The utility model discloses a control mechanism adopts 1 control ring electrode 4 straightways of push-pull control mechanism crooked, and 4 ring diameters of rotary control mechanism 3 regulation ring electrode, and the image is directly perceived, and the one hand can be operated, has greatly made things convenient for the doctor of performing the operation.
Claims (10)
1. The utility model provides a but control mechanism of two kinds of bendings of simultaneous control electrode catheter head end, the operating device of near-end is connected with electrode catheter, its characterized in that: the operating mechanism is provided with a connecting mechanism (2), the near end of the connecting mechanism (2) is coaxially sleeved and connected with a push-pull control mechanism (1), and the far end of the connecting mechanism (2) is coaxially sleeved and connected with a rotary control mechanism (3); the distal end of the electrode catheter is connected with a ring electrode (4), the distal end of the ring electrode (4) is in an open circular ring shape in a free state, and a section adjacent to the circular ring shape is a straight line section; the push-pull control mechanism (1) moves along the axis of the connecting mechanism (2) to control the bending of the straight line section; the rotary control mechanism (3) rotates around the axis of the connecting mechanism (2) to control the diameter of the circular ring.
2. The control mechanism of claim 1, wherein the two bending shapes of the tip of the electrode catheter can be controlled simultaneously, and the control mechanism comprises: the connecting mechanism (2) is provided with a cylindrical push rod (22), the outer edge of the middle part of the push rod (22) protrudes outwards along the radial direction to form a circle of first protrusions, and the first protrusions divide the push rod (22) into a proximal part and a distal part;
the cylinder at the proximal part is provided with a limiting groove parallel to the axis;
a groove is axially formed in the cylinder of the distal end part, two sides of the groove are positioned on the plane of the axis, the bottom edge of the groove is lower than the plane of the axis, a cylindrical sliding block (23) is coaxially arranged in the groove, a sliding block cover (25) is arranged on the other side of the plane of the axis, the groove and the sliding block cover (25) form a cylindrical space for the axial movement of the sliding block (23), and the bottom edge of the groove and the linear edge of the sliding block cover (25) form a long groove parallel to the axis of the cylindrical space;
the sliding block (23) is provided with a through hole along the axis, the middle part of the sliding block is provided with two radial screw holes and through holes which are distributed in 90 degrees and are vertical to the axis, the screw holes are spirally filled with pull wire fixing columns (24), small shafts which protrude outwards are arranged in the through holes, the through holes which are vertical to the axis are arranged near the tail end of each pull wire fixing column (24), and the pull wire fixing columns (24) are communicated with the axial through holes of the sliding block (23) after being screwed into the screw holes of the sliding block (23); the small shaft extends out of a long groove of the cylindrical space;
the far end of the push rod (22) is a chuck, the chuck is in a cylinder shape, four symmetrical long grooves are formed in the far end portion of the cylinder along the axis to form a chuck capable of being folded inwards, sawteeth are formed in the inner surface of the chuck along the circumferential direction, and external threads are arranged at the root of the chuck.
3. The control mechanism of claim 2, wherein the two bending shapes of the electrode catheter tip can be controlled simultaneously, and the control mechanism comprises: an annular first sealing groove is formed in the outer edge of the near end of the push rod (22) along the circumferential direction, and a first damping ring (21) is embedded in the annular first sealing groove; one side of the far end of the groove protrudes outwards in the radial direction to form a circle of second protrusion, the outer edge of the second protrusion is provided with an annular second sealing groove in the circumferential direction, and a second damping ring (26) is embedded in the second sealing groove.
4. The control mechanism of claim 3, wherein the two bending shapes of the electrode catheter tip can be controlled simultaneously, and the control mechanism comprises: the push rod (22) is made of polyformaldehyde resin.
5. The control mechanism of claim 4, wherein the two bending shapes of the electrode catheter tip can be controlled simultaneously, and the control mechanism comprises: the push-pull control mechanism (1) is provided with a cylindrical handle shell (13), and a section of the far end of the handle shell (13) is coaxially sleeved on the proximal part of the push rod (22);
the outer edge of the far end part of the handle shell (13) is in threaded connection with a locking nut (18), and the far end part of the internal thread of the locking nut (18) is in an internal cone shape with a small head facing to the far end; a section of the far end of the handle shell (13) is provided with a screw hole along the radial direction, a limit screw (16) is screwed in, and the limit screw (16) extends into a limit groove of the near end part of the push rod (22) which is parallel to the axis;
a cylindrical handle inner core (15) is coaxially arranged in a hole at one section of the near end of the handle shell (13), a through hole is formed in the handle inner core (15) along the axial direction, a screw hole is formed in the middle of the handle inner core (15) along the radial direction, a hole is formed in one section of a cylinder at the near end of the handle shell (13) along the radial direction, a steel wire fixing column (14) is screwed into the screw hole of the handle inner core (15) through the hole, a through hole vertical to the axis of the steel wire fixing column (14) is formed near the tail end of the steel wire fixing column (14), and the steel wire fixing column (14) is communicated with the axial through hole.
6. The control mechanism of claim 5, wherein the two bending shapes of the electrode catheter tip can be controlled simultaneously, and the control mechanism comprises: an annular damping ring (17) is arranged at the far end of the handle shell (13).
7. The control mechanism of claim 6, wherein the two bending shapes of the electrode catheter tip can be controlled simultaneously, and the control mechanism comprises: the rotation control mechanism (3) is provided with a circle adjusting knob (31), the inner wall of the rotation control mechanism is provided with a double-end thread groove, and the thread groove is in sliding fit connection with a small shaft connected with the sliding block (23); the ring adjusting knob (31) is coaxially sleeved at the distal end part of the push rod (22) and forms sliding fit connection with a cylindrical space formed by the groove at the distal end of the push rod (22) and the slide block cover (25); the root of the chuck of the push rod (22) is in threaded connection with a fixing nut (32), the end part of the far end of the internal thread of the fixing nut (32) is in an inner conical shape with a small head facing the far end, and the far end face of the fixing nut (32) is provided with a through hole.
8. The control mechanism of claim 7, wherein the two bending shapes of the electrode catheter tip can be controlled simultaneously, and the control mechanism comprises: the proximal end of the tube body of the electrode catheter extends into the center of the four-piece chuck at the distal end of the push rod (22).
9. The control mechanism of claim 8, wherein the two bending shapes of the tip of the electrode catheter can be controlled simultaneously, and the control mechanism comprises: two pull wire steel wires are arranged in the tube body of the electrode catheter, the far end of the pull wire steel wire for controlling the straight section of the ring electrode (4) to bend is connected to the far end part of the straight section of the ring electrode (4), and the near end of the pull wire steel wire for controlling the straight section of the ring electrode (4) to bend passes through an axial through hole of a handle inner core (15) and a through hole of a steel wire fixing column (14) and is fixed on; the far end of a stay wire steel wire with the diameter of the far end ring of the ring electrode (4) is connected to the far end part of the ring electrode (4), and the near end of the stay wire steel wire passes through the axial through hole of the sliding block (23) and the through hole of the stay wire fixing column (24) and is fixed on the rotation control mechanism (3).
10. The control mechanism of claim 9, wherein the two bending shapes of the tip of the electrode catheter can be controlled simultaneously, and the control mechanism comprises: the steel wire fixing column (14) and the pull wire fixing column (24) are made of aluminum alloy, and the handle inner core (15) and the sliding block (23) are made of polyformaldehyde resin.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110251123A (en) * | 2019-07-09 | 2019-09-20 | 深圳市惠泰医疗器械有限公司 | Can simultaneously coordination electrode conduit two kinds of bendings of head end control mechanism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110251123A (en) * | 2019-07-09 | 2019-09-20 | 深圳市惠泰医疗器械有限公司 | Can simultaneously coordination electrode conduit two kinds of bendings of head end control mechanism |
| CN110251123B (en) * | 2019-07-09 | 2024-05-24 | 深圳惠泰医疗器械股份有限公司 | Control mechanism capable of simultaneously controlling two bending shapes of electrode catheter head end |
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