CN216495497U - Flexible stone breaking device - Google Patents

Abstract

The utility model discloses a flexible stone breaking device which comprises a flexible pipe, wherein a driving mechanism is fixed at the far end of the flexible pipe, a cable of the driving mechanism penetrates through the flexible pipe and is connected with a control switch, a stone breaking part is arranged at the output end of the driving mechanism, and the stone breaking part makes linear reciprocating motion towards the extending direction of the flexible pipe. The flexible tube is convenient to bend, can be inserted by utilizing a guide sheath or a channel of an endoscope, can realize minimally invasive ballistic impact on broken stone, can greatly reduce the wound of a patient, reduces the risk of infection and improves the safety of the operation. Moreover, the flexible tube can be placed into the corners of the intestines and stomach or the renal pelvis, so that the stone can be crushed in various corners, and the stone crushing effect is better. Utilize actuating mechanism to drive the reciprocal stone that strikes of rubble portion and carry out the rubble, efficient wound is little, does not need extra auxiliary assembly to instruct, and the expense is still less, and is more friendly to patient.

Description

Flexible stone crushing device

Technical Field

The utility model relates to the field of medical equipment, in particular to a flexible stone breaking device.

Background

Urinary calculus is a general term for kidney, ureter and bladder calculus, and urinary calculus can cause urinary tract injury, obstruction and complicated infection, so that renal function is damaged, and great pain is brought to patients. At present, the international treatment method for urinary calculus is mainly divided into a laser lithotripsy technology, an air pressure trajectory technology or an external ultrasonic lithotripsy technology, but the methods have respective defects, and after the lithotripsy is performed by using laser surgery, the urethra of a patient is easy to be narrowed due to the fact that the human body is burnt by the laser at high temperature; the external ultrasonic lithotripsy has sequelae that the inner wall of the bladder of a patient is easy to bleed or inflame due to the shock wave effect, but the lithotripsy cannot be bent by using an air pressure trajectory, only a channel can be established by a percutaneous kidney, the wound is large, and the lithotripsy is difficult to be carried out by contacting stones in bent corners.

SUMMERY OF THE UTILITY MODEL

To overcome at least one of the above-mentioned problems of the prior art, the present invention provides a flexible lithotripsy apparatus that can be bent and inserted into an endoscope or guide sheath without the need for a percutaneous access port.

The utility model provides a flexible rubble device, including flexible tube, actuating mechanism and rubble portion, actuating mechanism fixes the distal end of flexible tube, actuating mechanism's control cable passes and is connected with control switch from the flexible tube, and rubble portion sets up the output at actuating mechanism, and actuating mechanism drives rubble portion and is straight reciprocating motion flexible tube along the extending direction of flexible tube.

The flexible stone breaking device at least has the following beneficial effects: the flexible tube is convenient to bend, can be inserted by utilizing a guide sheath or a channel of an endoscope, can realize minimally invasive ballistic impact on broken stone, can greatly reduce the wound of a patient, reduces the risk of infection and improves the safety of the operation. Moreover, the flexible tube can be placed into the corners of the intestines and stomach or the renal pelvis, so that the stone can be crushed in various corners, and the stone crushing effect is better. Utilize actuating mechanism to drive the reciprocal stone that strikes of rubble portion and carry out the rubble, efficient wound is little, does not need extra auxiliary assembly to instruct, and the expense is still less, and is more friendly to patient.

In some embodiments of the above flexible stone breaking device, the driving mechanism is a linear motor, the linear motor can be miniaturized, the size of the stone breaking device is greatly reduced, the stone breaking device can be conveniently inserted into a small-sized channel, and the linear motor is high in frequency, high in impact efficiency and capable of quickly breaking stones.

In some embodiments of the above flexible stone breaking device, the driving mechanism is an electromagnetic reciprocating mechanism, the electromagnetic reciprocating mechanism includes a hollow inner core bracket fixed at the end of the flexible tube, at least one set of coils wound on the bracket, the coils are all connected to an ac power supply, the stone breaking portion extends into the inner core of the bracket, the stone breaking portion has magnetism, and the coils drive the stone breaking portion to perform linear motion after being electrified; electromagnetic control can realize high-frequency impact, and can also carry out frequency modulation, carry out the impact rubble of different rates.

In some embodiments of the above flexible stone breaking device, the stone breaking portion is a permanent magnet, and the stone breaking portion is inserted into an inner core of the bracket; the rubble portion of permanent magnet structure can be under the influence of magnetic field motion by oneself, and whole rubble portion simple structure, small quality is light.

In some embodiments of the above flexible lithotripter device, the lithotripter portion is provided with a permanent magnet, the permanent magnet is located in an inner core of the bracket; the added permanent magnet can be suitable for the gravel parts with different structures, and the cost of the independently arranged permanent magnet is low.

In some embodiments of the above flexible stone breaking device, the end of the stone breaking part is set to be conical, and stones are more easily broken when the stones are impacted by the conical shape, so that the stone breaking efficiency is improved, the pain of a patient is relieved, and the operation time is shortened.

In some embodiments of the above flexible stone breaking device, the proximal end of the flexible tube is provided with a locking structure, so that the flexible tube is convenient to operate and control, and the driving mechanism can be better held during operation.

In some embodiments of the above flexible stone breaking device, the rigidity of the distal end of the flexible tube is greater than the rigidity of other positions of the flexible tube, so that the flexible tube cannot be bent and displaced randomly during movement of the stone breaking part, and the accuracy and the safety of breaking the stone are ensured.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. Obviously, the described figures are only some embodiments of the utility model, not all embodiments, and other designs and figures can be obtained by those skilled in the art without inventive effort, based on these figures:

FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 2 is an enlarged partial cross-sectional view taken at A in FIG. 1;

FIG. 3 is a cross-sectional view of a drive mechanism according to a second embodiment of the present invention;

fig. 4 is a sectional view of a driving mechanism according to a third embodiment of the present invention.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It should be noted that unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and include, for example, fixed or removable connections or integral connections; the connection can be mechanical connection or electrical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Disclosed is a flexible lithotripter, which is schematically shown in fig. 1, and which comprises a flexible tube 1, wherein the flexible tube 1 is in the form of a flexible elongated tube, and a distal end of the flexible tube 1 is inserted into a body cavity of a living body when in use, a drive mechanism 2 is fixed to the distal end of the flexible tube 1, a cable for controlling the drive mechanism 2 is connected to the drive mechanism 2, the cable is passed through the interior of the flexible tube 1 and is connected to a control switch (not shown), and the control switch of the lithotripter may be provided outside the flexible tube 1 or at a proximal end of the flexible tube 1. The output end of the driving mechanism 2 is provided with a gravel part 3, and the gravel part 3 can be driven to do linear reciprocating motion towards the extending direction of the flexible pipe 1 after the driving mechanism 2 is started.

The lithotripsy device is used for various stone ablation operations such as urinary calculus, gallstone, gastric calculus and the like, various medical instruments such as a guide sheath or a soft endoscope (hereinafter referred to as a soft lens) and the like are firstly used for entering a body cavity to establish a channel, then an instrument working channel of the bendable flexible tube 1, which is led into the guide sheath or the soft lens, is used for aligning the lithotripsy part 3 to the calculus, the lithotripsy part 3 can carry out ballistic impact lithotripsy on the calculus, the calculus can be grasped by matching with instruments such as a grabbing basket and the like, accurate lithotripsy is carried out, and lithotripsy can be carried out after the calculus.

The lithotripsy device realizes minimally invasive ballistic impact lithotripsy, can greatly reduce the wound of a patient, improves the safety of the operation, reduces the risk of infection and accelerates the postoperative recovery speed. And the flexible tube 1 can be bent and inserted into various bent corners in body cavities such as intestines and stomach or renal pelvis and the like by matching with the soft lens, thereby solving the problem that the hidden calculus is difficult to melt by the original hard calculus smashing device. Utilize actuating mechanism 2 to drive 3 reciprocal impact calculi of rubble portion and carry out the rubble, efficient wound is little, does not need extra auxiliary assembly to instruct, and the expense is still less, and is more friendly to patient.

According to fig. 2, the driving mechanism 2 in the first embodiment is a linear motor, and the linear motor is fixed in the flexible tube 1 through dispensing or embedded in the mounting seat, and the mounting seat is clamped into the flexible tube 1 for fixing. Linear motors are also referred to as linear motors, linear motors or linear motors. The common linear motor types include a flat plate type, a U-shaped groove type and a tubular type, and various types can be selected according to thrust and load on the basis of ensuring the linear reciprocating motion of the output end of the motor. The linear motor is mature in technology and widely applied to the medical field. The linear motor is small in size and light in weight, can achieve the purpose of reducing the size of the stone breaking device, and is convenient to insert into small-sized instrument channels. And linear electric motor's acceleration is fast, and the friction is little, can produce high-speed impact frequency, realizes quick rubble, improves the efficiency of rubble.

The lithotripsy portion 3 of tip formula as an organic whole of linear electric motor output shaft, the tip of lithotripsy portion 3 set up to the toper, and the toper structure calculus is more cracked when striking the calculus to improve lithotripsy efficiency, alleviate patient's misery, shortened operation time. The crushed stone part 3 is also subjected to local hardening treatment, and has the performance of more enduring stones and abrasion than the rest part.

In other embodiments, not shown, the stone-breaking portion 3 is an external stone-breaking rod, and the material of the stone-breaking portion 3 is different from that of the output shaft of the driving mechanism 2, or the same material is hardened differently, so as to improve the strength of the stone-breaking portion 3 and improve the stone-breaking efficiency.

The near-end of flexible pipe 1 still is provided with hasp structure 4, and hasp structure 4 is the stereoplasm cyclic annular, and the surface of hasp structure 4 is provided with the screw thread, and after 1 distal end of flexible pipe placed in place, hasp structure 4 spiral is fixed on the working channel of sheath or soft mirror, can fix flexible pipe 1, and actuating mechanism 2 need not hold flexible pipe 1 during operation, and fixed back flexible pipe 1 also can not shift. Besides the hard ring, the locking structure 4 can be a split lantern ring, the lantern ring can be flexibly and movably sleeved outside the flexible tube 1, threads are arranged outside the lantern ring, and the lantern ring is fixed on a working channel of a guide sheath or a soft lens through the threads and used for screwing and fixing the flexible tube 1.

The distal end of flexible pipe 1 has carried out the rigidity reinforcing and has handled, make the rigidity of distal end be greater than the rigidity of flexible pipe 1 other positions, the flexible pipe 1 end that shows in figure 2 is provided with the positioning seat 8 of stereoplasm, positioning seat 8 is cylindricality and imbeds inside the flexible pipe 1 distal end, be provided with the hole site that holds actuating mechanism 2 in the positioning seat, make positioning seat 8 can not only install actuating mechanism 2, can also strengthen the rigidity of the flexible pipe 1 distal end, make the flexible pipe 1 of installing actuating mechanism 2 part not easily crooked. The distal end of the flexible tube 1 can ensure that the gravel part 3 can not bend and shift randomly when moving, the movement direction of the gravel part 3 is kept straight, and the accuracy and the safety of gravel are ensured. In addition to the rigid positioning socket, a hard material, such as pvc material, may be used at the end of the flexible tube 1, or a surface hardening treatment, such as applying a chemical coating to the distal end of the flexible tube 1, may be performed to form a hardened coating.

Referring to the second embodiment and the third embodiment in fig. 3 and 4, the driving mechanism 2 is an electromagnetic reciprocating mechanism, the electromagnetic reciprocating mechanism includes a support 5 fixed at the end of the flexible pipe 1 and having a hollow inner core, at least one set of coils 6 wound on the support 5, the coils 6 are all connected to an alternating current power supply, the lithotripsy portion 3 extends into the inner core of the support 5, the lithotripsy portion 3 has magnetism, and the coils 6 drive the lithotripsy portion 3 to perform linear motion after being electrified.

The tail end of the gravel part 3 extends into an inner core of the support 5, the gravel part 3 has polarity, one end of a magnetic field generated by the two groups of coils 6 simultaneously attracts the gravel part 3, and the other end of the magnetic field repels the gravel part 3, so that the gravel part 3 moves to one attracted side. After the half period, the current is reversed, the gravel part 3 is attracted by the magnetic force to move to the other side, and the two groups of coils 6 drive the gravel part 3 to do linear reciprocating motion together. Electromagnetic control can realize high-frequency impact, and can also carry out frequency modulation, adjust different rates and carry out the rubble.

Specifically, in the second embodiment, two sets of coils 6 are wound around the bracket 5 in parallel, the housing 7 is sleeved outside the bracket 5, and the housing 7 is assembled with the bracket 5 to hermetically fix the coils 6 on the bracket 5. And a wire outlet hole is reserved on the shell 7, and after the cables of the coil 6 are connected in series, the head end and the tail end of each cable extend out of the wire outlet hole and are connected to an alternating current power supply together. The macadam part 3 is externally sleeved with a permanent magnet, and the permanent magnet moves under the action of a magnetic field. Two groups of coils 6 are connected in series to an alternating current power supply, the alternating current power supply generates pulse current, two magnetic fields with the same magnetic pole are simultaneously generated in the two coils 6, and the two magnetic fields are superposed to attract the gravel part 3 in the inner core of the bracket 5 to reciprocate.

Specifically, in the third embodiment, three sets of coils 6 are wound around the support 5 in parallel, the support 5 is sleeved with the housing 7, and the housing 7 is assembled with the support 5 to hermetically fix the coils 6 on the support 5. The shell 7 is provided with wire outlet holes, the head end and the tail end of the cable of each group of coils 6 extend out of the wire outlet holes, and each coil 6 is connected to a respective alternating current power supply. The gravel part 3 is made of a permanent magnet material, and the gravel part 3 has magnetism and can move under the action of a magnetic field. Different alternating current power supplies supply alternating currents with phase differences, and each coil 6 supplies magnetic fields with time differences, so that the magnetic poles at the two ends of each coil 6 are regularly changed.

To explain the operation state of embodiment 3 in fig. 4, the stone-crushing portion 3 is initially located in the leftmost coil 6, the left end of the stone-crushing portion 3 is the S pole, the right end is the N pole, the leftmost coil 6 is energized, the left side is the N pole, and the right side is the S pole, and the stone-crushing portion 3 is attracted to move to the right. At this time, the middle coil 6 is energized, the left side is an S pole, the right side is an N pole, the rightmost coil 6 is energized, the left side is an N pole, and the right side is an S pole. When the lithotripsy portion 3 moves inside the middle coil 6, the alternating current in the leftmost coil 6 now makes the coil 6 have N poles on the left and S poles on the right, the alternating current in the middle coil 6 makes the coil 6 have S poles on the left and N poles on the right, and the alternating current in the leftmost coil 6 makes the coil 6 have S poles on the left and N poles on the right. And by analogy, the alternating current power supply which is changed ceaselessly causes the stone crushing part 3 to reciprocate in the coil 6.

While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.

Claims (8)

1. A flexible lithotripsy device characterized by: comprises that

A flexible tube (1);

the driving mechanism (2) is fixed at the far end of the flexible pipe (1), and a control cable of the driving mechanism (2) penetrates through the flexible pipe (1);

rubble portion (3), rubble portion (3) set up the output in actuating mechanism (2), and actuating mechanism (2) drive rubble portion (3) are straight reciprocating motion along the extending direction of flexible pipe (1).

2. The flexible lithotripter device of claim 1, wherein: the driving mechanism (2) is a linear motor.

3. The flexible lithotripter device of claim 1, wherein: the driving mechanism is an electromagnetic reciprocating mechanism, the electromagnetic reciprocating mechanism comprises a support (5) fixed to the tail end of a flexible pipe (1) and an inner core hollow, at least one group of coils (6) are wound on the support (5), the coils (6) are connected to an alternating current power supply, a gravel part (3) stretches into the inner core of the support (5), the gravel part (3) has magnetism, and the gravel part (3) is driven to perform linear motion after the coils (6) are electrified.

4. The flexible lithotripter device of claim 3, wherein: the gravel part (3) is a permanent magnet, and the gravel part (3) is inserted into an inner core of the support (5).

5. The flexible lithotripter device of claim 3, wherein: the gravel part (3) is provided with a permanent magnet, and the permanent magnet is positioned in an inner core of the bracket (5).

6. The flexible lithotripter device of claim 1, wherein: the end part of the gravel part (3) is arranged to be conical.

7. The flexible lithotripter device of claim 1, wherein: the near end of the flexible pipe (1) is provided with a locking structure (4).

8. The flexible lithotripter device of claim 1, wherein: the rigidity of the far end of the flexible pipe (1) is higher than that of the other positions of the flexible pipe (1).

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