CN109077798B

CN109077798B - Radio frequency ultrasonic knife with replaceable knife tube

Info

Publication number: CN109077798B
Application number: CN201811047924.1A
Authority: CN
Inventors: 邱学文; 孙魁; 朱卫国
Original assignee: Wuhan Banbiantian Medical Technology Development Co Ltd
Current assignee: Wuhan Banbiantian Medical Technology Development Co Ltd
Priority date: 2018-09-07
Filing date: 2018-09-07
Publication date: 2023-12-29
Anticipated expiration: 2038-09-07
Also published as: CN109077798A

Abstract

The invention discloses a radio frequency ultrasonic knife with a replaceable knife tube, which is characterized in that a knife tube assembly consisting of a clamp head, an outer tube, an inner tube and a flower knob nut is modularized, the knife tube assembly is connected with the inner tube of the knife tube assembly through a draw hook pipe fitting, the flower knob is fastened with the flower knob nut, the fastening connection of an ultrasonic knife handle and the knife tube assembly is realized, and the opening and closing of the ultrasonic knife handle spanner directly drives the linear motion of the inner tube, so that the opening and closing of the clamp head and a knife bar are controlled. The modularized knife tube assembly can realize quick disassembly, separation and replacement of the knife tube assembly part, and independently clean and disinfect the ultrasonic knife, so that the easy-to-wear knife tube and clamp head part can be updated and the knife part can be reused, and the medical cost is reduced.

Description

Radio frequency ultrasonic knife with replaceable knife tube

Technical Field

The invention relates to the technical field of medical appliances, in particular to a radio frequency ultrasonic knife with a replaceable knife tube, which is a device capable of conveniently replacing an inner tube and an outer tube in a surgical operation to enable a knife bar and a handle of the radio frequency ultrasonic knife to be reusable and capable of randomly switching a radio frequency working mode, an ultrasonic working mode and a radio frequency and ultrasonic working mode through different buttons. One medical appliance of two types of bipolar coagulation forceps and ultrasonic knife can be replaced by one appliance.

Background

Ultrasonic blades are commonly used in surgical procedures to convert and transmit ultrasonic energy into biological tissue, which produces the thermal effect of mechanical vibrations to break the hydrogen bonds of tissue proteins, denature and coagulate proteins, and in particular to coagulate, stop bleeding, cut tissue, etc. using the mechanical and thermal energy generated by the blades. In surgical instruments, an ultrasonic generator (ultrasonic device host) generates high frequency electrical energy, converts the high frequency electrical energy into mechanical vibrational energy through the piezoelectric or electromagnetically induced compression material of the transducer, and amplifies and transmits the vibrational energy to the active tip (or tool bit of the tool bar).

Surgery using the effect of radio frequency has also been a part of the history. Bipolar electric coagulation forceps are widely used in various surgical procedures. The tissue is dehydrated, coagulated, broken and separated by utilizing the thermal effect of high-frequency current (the frequency range is 200kHz-5 MHz) generated by a radio frequency generator (a radio frequency equipment host machine), so as to achieve the purpose of operation.

The inner and outer tube parts (including the binding clip) of the ultrasonic knife are inseparable from the knife bar and the handle, the inner and outer tube parts are fixed with the knife bar and the knob through the locating pin, and the knob is arranged in the mounting groove of the handle and can not be separated from the handle. If the handle is separated, the handle upper cover and the handle lower cover are opened only, so that the handle upper cover and the handle lower cover are destroyed. In addition, the reassembly process is complicated, and must be performed in a factory by using special equipment, and is not operable in clinical practice by being disassembled by a doctor. Because the cutter bar is not detachable, after one operation, the pollutants such as tissue residues, blood and the like between the forceps head and the cutter bar, between the inner tube and the outer tube and between the inner tube and the cutter bar are not easy to remove and clean, and the cutter tube and the handle cannot be separately disinfected and sterilized, because the whole disinfection and sterilization can damage the electric structure and the movement structure inside the handle. Incomplete sterilization and reuse as a procedure can cause cross-infection in the next patient. Thus, ultrasonic blades in common use today are regulated to be disposable only. The service lives of the cutter bar and the handle are often longer than once, and the cutter bar and the handle can be reused after being cleaned and sterilized. In contrast, the cost of the inner and outer tube parts with the forceps heads is lower, the whole ultrasonic knife, particularly the knife bar, is of a special-shaped structure, the knife bar surface is clamped and stuck with a silicone ring as shown in fig. 11 of patent 201420459779.9, the knife bar is made of titanium alloy materials, the processing difficulty is high, the price is high, the market selling price is more than 5000 yuan, and in most operations, the expensive medical cost generated by disposable use is finally transferred to a patient, and the patient bears the expensive medical cost, so that the medical burden of the patient is greatly increased.

The prior application 1, chinese patent number is: 201420459779.9, the invention name is: a detachable ultrasonic knife tube quick butt joint device. The device comprises a clamp head, an outer tube, an inner tube, a knob, a cutter bar and an ultrasonic cutter handle, wherein one end of the cutter bar is connected with the handle, the other end of the cutter bar penetrates through the inner tube to be matched with the clamp head, the outer tube and the inner tube are respectively divided into an outer tube and an inner tube which are connected to the clamp head part and an outer tube II and an inner tube which are connected to the ultrasonic cutter handle part, the outer tube is sleeved into an outer tube male sleeve to be fixed, the left end of the inner tube I is inserted into the outer tube, the right end of the inner tube is sleeved into an inner tube male sleeve, the outer diameter of the inner tube male sleeve is larger than the inner diameter of the outer tube, the outer tube is sleeved into an outer tube female sleeve and is fixedly connected with the right end of the outer tube female sleeve, the inner tube male sleeve is sleeved into the inner tube female sleeve and is fixedly connected with the right end of the inner tube female sleeve, a rotary pushing clamping groove is formed in the inner tube male sleeve, the inner tube male sleeve is sleeved into the inner tube female sleeve to enable the inner tube to be in butt joint with the inner tube, a pin is arranged on the inner tube female sleeve, the pin is clamped in the rotary pushing clamping groove of the inner tube male sleeve, the outer tube male sleeve is sleeved into the outer tube female sleeve is provided with a clamping groove, a threaded hole coaxial with the outer tube groove of the outer tube male sleeve, and the hemispherical clamping screw is screwed into the hemispherical end of the hemispherical clamping groove of the outer tube male sleeve, and the hemispherical screw is fixed into the hemispherical clamping groove; the right end of the outer tube sleeve is sleeved into the knob for internal fixation, the outer tube and the right end of the inner tube are radially and fixedly connected with the knob and the cutter bar through the bayonet lock, the pin hole of the inner tube connected with the bayonet lock is an axial sliding guide hole, and a space for axial sliding of the inner tube sleeve is arranged in the outer tube sleeve, namely, a certain stroke space exists between the inner tube and the outer tube in the axial direction.

The ultrasonic knife has the advantages that the disassembly and the replacement of the inner tube and the outer tube of the ultrasonic knife can be realized, the knife tube assembly is used as disposable consumable material to be used as replacement consumable material, the knife bar and the handle are repeatedly used, the ultrasonic knife can be utilized to the maximum extent, and the operation cost is reduced.

There are several disadvantages to this approach that seriously affect use: 1. the outer tube fixing screw is used for screwing, a doctor operates with the silica gel glove in actual postoperative cleaning, and once the doctor is stained with the liquid outer tube fixing screw, the doctor can slip, the operation is inconvenient, the fixing screw can not be guaranteed to be unscrewed, and the inner tube and the outer tube can be reliably disassembled. It is also impossible to ensure the tightening of the fixing screw after replacement and whether or not the inner and outer tubes are reliably fixed. 2. Because the fixing screw has a large volume and occupies a certain space, the torque wrench cannot be conveniently used, and therefore, the reliable connection between the cutter bar and the transducer is difficult to ensure. 3. The plurality of fixing screws on the ultrasonic knife are easy to hang other medical pipelines carelessly, so that the smooth operation is affected.

The prior application 2, chinese patent number is: 201520038104.1, the invention name is: an ultrasonic knife with high-frequency hemostatic function. The device comprises an ultrasonic cutter bar, a clamp head, an inner tube, a pin, an outer tube, a rotary handle, a handle and a conductive polytetrafluoroethylene gasket, wherein the clamp head is provided with a T-shaped clamping groove, the conductive polytetrafluoroethylene gasket with fine teeth is clamped in the T-shaped clamping groove of the clamp head, the clamp head is connected with the outer tube through the pin, the clamp head rotates by taking the pin as an axis, two protruding points are clamped in holes on the inner tube, and the inner tube axially moves to drive the clamp head to open and close.

According to the scheme, the ultrasonic cutter bar is arranged in the middle of the inner tube, a plurality of silica gel rings are arranged on the ultrasonic cutter bar to support, and proper gaps are kept between the ultrasonic cutter bar and the inner wall of the inner tube by using the support of the silica gel rings, so that electrical insulation is formed. Therefore, the cutter bar can be used as one pole of the electric circuit of the bipolar coagulation forceps. The outer wall of the outer tube is sleeved with a polytetrafluoroethylene insulating sleeve or sprayed with a polytetrafluoroethylene coating for insulation, the clamp head and a conductive polytetrafluoroethylene gasket on the clamp head are used as the other pole of the electric loop of the bipolar electric coagulation forceps, the middle ultrasonic cutter bar is used as one pole of the bipolar electric coagulation forceps, the two poles are electrified with the outside of the high-frequency operation equipment, and the high-frequency bioelectricity effect is utilized for realizing the cutting and coagulation functions of tissues, so that the functions of the bipolar electric coagulation forceps are realized on the basis of a common ultrasonic cutter.

The ultrasonic knife handle is connected with the transducer, the tail of the transducer is provided with an electric wire, the ultrasonic transducer is powered, a channel can be provided for a high-frequency loop, and the details of the transducer can be referred to in the literature: sandwich type low-frequency ultrasonic transducer design, sichuan soldier school of things, 2012.7. The transducer is provided with two conducting rings which are contacted with conducting sheets in the handle, a control loop is formed through a button of the handle, and the switch value of the ultrasonic host is mainly transmitted, and the low voltage and the low current are used for controlling the 55.5kHz electric output of the ultrasonic host. The output end of the high-frequency operation equipment is connected with the cutter bar through one of the conducting rings in the transducer, and the cutter bar and the ultrasonic transducer are switched on and off together, so that the high-frequency can be controlled while the ultrasonic is controlled.

There are also several disadvantages to this solution that seriously affect the promotion: 1. compared with the common ultrasonic knife, the ultrasonic knife with the high-frequency hemostatic function has the same irremovable problem, and can clean after actual operation, and the residual pollutants such as tissues, blood and the like between the inner pipe and the outer pipe and the knife bar can cause cross infection of the next patient once the ultrasonic knife is not thoroughly cleaned and is unreliable in sterilization. 2. The ultrasonic knife is discarded after being used once according to the requirements of regulations, and the whole cost is spread on one operation, so that the medical burden can be increased for patients. 3. The clamp head tetrafluoro pad on the ultrasonic knife is a consumable product, and the service life of the knife bar and the handle on the ultrasonic knife is not finished by one operation, so that the disposable use can cause resource waste, increase the quantity of medical wastes and form environmental pollution. 4. The conductive polytetrafluoroethylene generally reaches a conductive function by doping graphite powder in the material, and the conductive polytetrafluoroethylene is practically applied to antistatic occasions. The material is suitable for electrostatic discharge, and the conductivity of the material cannot meet the practical requirement for high-frequency operation. 5. The ultrasonic electric signal and the high-frequency electric signal are input by the same circuit, and the high-frequency (radio frequency) 550kHz high voltage passes through the conducting ring, so that the switching value of low-voltage small current is interfered, and the normal work of each circuit is affected. 6. The two working source signal inputs are bundled together, so that a doctor can not conveniently select to work in a single ultrasonic mode or a single high-frequency mode or the two modes to work together according to the operation requirement. 7. This solution does not have a separate high frequency operation mode. Both schemes have disadvantages. In order to solve the defects, the applicant provides a better and more advanced technical scheme.

Disclosure of Invention

The invention aims at providing a radio frequency ultrasonic knife with a replaceable knife tube, which has a simple structure and convenient use, and a knife tube assembly (comprising a clamp head, an inner tube, an outer tube and a knob nut) of the radio frequency ultrasonic knife is modularized and is taken as an integral part. The invention also innovates the knife tube component structure, realizes quick disassembly, separation and replacement of the knife tube component, and ensures that the knife tube component is simple and convenient to operate and easy to maintain. The radio frequency ultrasonic knife can be disassembled, cleaned, disinfected and sterilized conveniently and reliably, or a knife tube assembly which is easy to wear and consume is updated in time, or the knife tube assembly is replaced by one time, so that the repeated utilization of the radio frequency ultrasonic knife (knife bar, handle and the like) is completed, and the cost is reduced.

The second purpose of the invention is to provide a radio frequency ultrasonic knife with a replaceable knife tube, wherein a radio frequency button is arranged on a handle of the radio frequency ultrasonic knife. The radio frequency ultrasonic knife has two functions of the bipolar electric coagulation forceps and the ultrasonic knife, integrates the functions, and avoids the complicated operation of frequently replacing the surgical instruments by doctors. The control circuit of the ultrasonic low-frequency circuit and the control circuit of the radio-frequency high-frequency circuit are improved, signal interference is avoided, and a doctor can select an independent radio-frequency working mode or an ultrasonic working mode or a mode of radio-frequency and ultrasonic combined working according to operation requirements conveniently.

The invention further aims at providing a radio frequency ultrasonic knife with a knife changing tube, wherein a waist round cleaning groove is arranged at one end of an outer tube of the radio frequency ultrasonic knife. So that the radio frequency ultrasonic knife has the function of convenient cleaning.

The invention aims at providing a torque wrench assembly which is used for installing or detaching a cutter bar and a transducer in a handle, so that the gloves or hands of medical staff are prevented from directly contacting the cutter tube assembly, and surgical tools are prevented from being polluted.

In order to achieve the above object, the present invention adopts the following technical measures:

a radio frequency ultrasonic knife with a knife-changing tube comprises a knife tube assembly, a knife bar, a clamp head, an ultrasonic knife handle, a flower knob and a draw hook pipe fitting, wherein one end of the knife bar penetrates through the draw hook pipe fitting and is fixed with the flower knob through a pin, the flower knob is clamped at the end part of the ultrasonic knife handle, and the other end of the knife bar penetrates through the knife tube assembly and is matched with the clamp head;

one end of the draw hook pipe fitting is provided with a clamping groove, the other end is hooked with the interior of the ultrasonic knife handle, a pin penetrates through a draw hook pipe fitting chute in the middle of the draw hook pipe fitting and moves linearly and reciprocally along the axial direction along with the opening and closing of the ultrasonic knife handle wrench,

the cutter tube assembly consists of an outer tube, an inner tube, a flower knob and a flower knob nut, one ends of the inner tube and the outer tube are respectively hinged with the clamp head, the other end of the inner tube is provided with a positioning pin which is arranged in a radial protruding way, the other end of the outer tube is outwards turned and folded to be variable in diameter, an axial sliding guide groove is formed at a position close to the end face, the positioning pin of the inner tube is limited and slides in the axial sliding guide groove of the outer tube, meanwhile, the inner tube is hooked with a drag hook pipe fitting through the positioning pin, so that the opening and closing actions of the clamp head and the head part of the cutter bar can be controlled, and the flower knob nut is in threaded connection with the flower knob and is used for axially locking the outer tube, so that one end of the outwards turned and folded diameter of the outer tube is axially fixed;

The flower knob is fixedly connected with the cutter bar and simultaneously is rotationally connected with the ultrasonic cutter handle, the cutter bar is axially fixed, and the flower knob and the cutter tube synchronously rotate in the circumferential direction;

the L-shaped rotary pushing guide groove is arranged between the axial sliding guide groove and the end surface of the outer tube or between the axial sliding guide groove and the end surface of the outer tube sleeve;

the outer tube is located the outside turn-out reducing section initiating terminal and still is equipped with the bulge loop for cooperate the turn knob nut and inject the outer tube removal in the axial, bulge loop and turn knob are in the outer periphery of inner tube and are closed and form the space that supplies the locating pin to follow axial slip.

As an alternative, optionally, the axial sliding guide groove is arranged on the surface of the outer tube male sleeve, and the outer tube male sleeve is connected with one end of the outer tube into a whole.

Alternatively, the positioning pin is arranged on the surface of the transition piece male sleeve, and the transition piece male sleeve is connected with one end of the inner tube into a whole. By the scheme, the locating pin is rotationally inserted into the axial sliding guide groove on the outer tube or the outer tube male sleeve through the L-shaped rotary pushing guide groove. Further, one end of the L-shaped rotary pushing guide groove extends to the end face along the radial direction of the outer tube or the outer tube sleeve, and the other end of the L-shaped rotary pushing guide groove extends to the axial sliding guide groove along the circumferential direction corner of the outer tube or the outer tube sleeve.

By the scheme, the locating pin is rotationally inserted into the clamping groove on the drag hook pipe fitting through the L-shaped rotary pushing guide groove, and the inner pipe is fixedly connected in the axial direction. By the above preferred scheme, further, L type rotatory propelling movement guide way one end extends to the terminal surface along drag hook pipe fitting radial, and L type rotatory propelling movement guide way other end extends to the draw-in groove along drag hook pipe fitting circumferencial direction corner.

Preferably, the L-shaped rotary pushing guide groove is an L-shaped slit.

Preferably, the positioning pin is fixedly connected to the inner pipe or the transition piece male sleeve, and protrudes outwards from the surface of the inner pipe or the transition piece male sleeve or protrudes inwards and outwards from the surface of the inner pipe or the transition piece male sleeve at the same time.

Alternatively, the connecting end of the outer tube and the clamp head is provided with a circular through hole, and the outer tube is hinged with the clamp head through a pin.

Specifically, the length of the axial sliding guide groove is longer than the movement stroke of the inner tube, and the length of the sliding space is longer than the length of the sliding guide groove.

Further, the diameter of the outer tube or the outer tube male sleeve at the outwards turned reducing section is larger than that of the outer tube, and the outer tube or the outer tube male sleeve is used for limiting the outer tube to move in the axial direction in cooperation with the knob and is used for sleeving a draw hook pipe fitting.

The ultrasonic knife capable of quickly replacing the knife tube is characterized in that the inner tube is provided with a square through hole at the hinged end of the clamp head, and the square through hole is movably hinged with the clamp head hook.

Preferably, the drag hook pipe fitting is located one end of the ultrasonic knife handle side and is provided with a limited force component hooking hole, the ultrasonic knife handle is internally provided with a limited force component, and the limited force component is hooked with the drag hook pipe fitting through the limited force component hooking hole and is used for driving the inner joint to move in an axial limiting manner through the drag hook pipe fitting.

Further, one end of the knob is provided with threads, and the threads are connected with the knob nut in a threaded manner, so that the cutter tube assembly is fixed on the ultrasonic cutter handle, the other end of the cutter tube assembly is provided with a through hole, and the cutter bar is fixed in a matched manner by penetrating the through hole and a positioning hole of the cutter bar through a pin.

Further, one end of the outer tube, which is close to the clamp head, is provided with a plurality of cleaning tanks, wherein the cleaning tanks are waist-shaped tanks or round windows and are used for high-pressure flushing and cleaning tissues or foreign matters between the inner tube and the outer tube.

Further, the end part of the cutter bar, which is positioned at the ultrasonic cutter handle side, is provided with a transducer coupling hole.

Further, the cutter bar is adhered with the silica gel ring, the silica gel ring of the cutter bar keeps a gap with the inner wall of the inner tube and forms insulation, and the cutter bar is made of a titanium alloy material and serves as one pole of the bipolar coagulation forceps.

Further, the outer tube is sleeved with a polytetrafluoroethylene insulating sleeve or sprayed with a polytetrafluoroethylene coating for insulation, and the clamp head and the conductive polytetrafluoroethylene gasket on the clamp head are used as one pole of the bipolar electrocoagulation clamp.

Further, the draw hook pipe fitting is provided with a polytetrafluoroethylene insulating sleeve or a polytetrafluoroethylene coating sprayed on the inner side of the draw hook pipe fitting chute for insulation

Further, a first conducting ring, a second conducting ring, a third conducting ring, a transducer, a radio frequency socket, a radio frequency button switch, a radio frequency and ultrasonic button and an ultrasonic button are arranged in the ultrasonic knife handle, one end of the first conducting ring is communicated with the knife bar through a pin, and the other end of the first conducting ring is connected with the radio frequency socket; one end of the second conducting ring is sequentially communicated with the drag hook pipe fitting, the locating pin, the inner pipe/transition piece male sleeve, the inner pipe and the clamp head through the force limiting assembly, and the other end of the second conducting ring is connected with the radio frequency button switch and the radio frequency and ultrasonic button in parallel; one end of the third conducting ring is connected with the ultrasonic equipment host through an ultrasonic button, and the other end of the third conducting ring is connected with the ultrasonic equipment host and the radio frequency plug through a radio frequency and ultrasonic button; the radio frequency plug and the radio frequency socket are used for connecting radio frequency equipment.

Specifically, the radio frequency ultrasonic knife is isolated through the cutter bar silica gel ring, the outer tube is coated with an insulating coating to prevent electric leakage, the outer surface of the clamp head is coated with the insulating coating, the inner surface is conductive, the radio frequency loop is electrically connected with the inner tube, the cutter bar is grounded, and the clamp head and the cutter head form a loop through control of the radio frequency switch.

Further, one end of the transducer is provided with a screw, the other end of the transducer is sleeved with an insulating sleeve, a piezoelectric ceramic ring and an electrode slice ring are arranged on the surface of the insulating sleeve at intervals, the screw is in threaded connection with the cutter bar and used for transmitting mechanical vibration, and the electrode slice ring is insulated from the cutter bar.

Further, the torque wrench conversion device is detachably connected with the knob nut, one end of the torque wrench conversion device is provided with a nut matching notch matched with the knob nut in shape, the other end of the torque wrench conversion device is provided with a nut matching notch matched with the torque wrench in shape, the torque wrench comprises a matching nut and a handle, and the matching through hole penetrates through the matching nut and the handle and is used for enabling the outer tube to penetrate through.

The torque wrench is characterized in that the matching through holes of the torque wrench are circular, the inner sides of the matching through holes are provided with limited force grooves, at least two force limiting grooves are arranged, the force limiting grooves are uniformly distributed along the circumferences of the matching through holes, and the bottoms of the force limiting grooves face the center of the matching through holes; the nut matching notch of the torque wrench conversion device extends along the axial direction, the top end of the nut matching notch is outwards turned to form a boss, and at least two U-shaped grooves are symmetrically arranged at the top end of the nut matching notch along the axial direction, so that symmetrical hooks are formed at the top end of the nut matching notch; an anti-slip nut is sleeved and fixed at one end of the nut matching notch and one end of the torque wrench conversion device, and convex strips are uniformly distributed on the periphery of the anti-slip nut; after the nut matching notch is sleeved with the matching nut, the convex strips are inserted into the trapezoid grooves, and the torque wrench is in force-limited rotary connection relative to the torque wrench conversion device.

The basic idea of the invention is that the knife tube component and the ultrasonic knife handle are easy to connect and detach:

when in connection, the drag hook pipe fitting is close to the transition piece male sleeve connected with the inner pipe, and is close to one end provided with the positioning pin, the transition piece male sleeve is pushed in, so that the positioning pin enters the L-shaped rotary pushing guide groove of the drag hook pipe fitting and then rotates, and the positioning pin is clamped into the clamping groove; then the outer pipe male sleeve connected with the outer pipe passes through the inner pipe and is close to the transition piece male sleeve, the outer pipe male sleeve is pushed in, the positioning pin enters the L-shaped rotary pushing guide groove of the drag hook pipe fitting, and then the positioning pin rotates, so that the positioning pin enters the axial sliding guide groove; penetrating the knob and the knob nut from one side of the outer tube and one side of the draw hook pipe fitting respectively, and tightly closing and screwing to assemble the cutter pipe assembly; then the cutter bar passes through the cutter tube assembly, so that a positioning hole of the cutter bar is aligned with a through hole of the knob nut, the cutter bar is fixed by penetrating a pin, and the force limiting assembly passes through the cutter bar and is clamped into a force limiting assembly hooking hole of the draw hook pipe fitting; and finally, installing the knob nut and the force limiting assembly in the ultrasonic knife handle, holding the handle wrench to open and close for several times, and connecting the knife tube assembly and the radio frequency ultrasonic knife handle after the clamp head and the knife head are inspected to open and close normally. When the tool is disassembled, the knob nut is rotated and loosened, the tool bar is rotated by 90 degrees anticlockwise, the outer tube and the inner tube are pulled out from the tool bar, and the separation of the tool tube assembly and the handle part of the radio frequency ultrasonic tool can be realized; when the transducer needs to be connected, the transducer is inserted into an ultrasonic slot at the rear part of the ultrasonic knife handle, the torque wrench conversion device and the torque wrench penetrate through the knife tube assembly in sequence to be clamped with the knob nut, the knife tube assembly can be driven to rotate in the ultrasonic knife handle by rotation, a screw of the transducer is aligned with a transducer coupling hole of a knife bar, installation can be completed by rotation fastening, in order to prevent the knife bar from connecting with the transducer, sliding wires are uniformly distributed in a matched through hole of the torque wrench, the rotation direction of a bevel edge of the trapezoid is opposite to the screw rotation direction of the screw on the transducer, the convex strips of the anti-slip nuts are matched with the relative positions of the trapezoid, the knife bar can be prevented from being damaged by overlarge screwing force when the knife bar is connected with the transducer, and if a radio frequency function is needed, a radio frequency plug is required to be inserted into a radio frequency socket.

The electrodes of the radio frequency plug are respectively connected with the cutter bar through pins, and are connected with the binding clip through the force limiting assembly, the drag hook pipe fitting, the transition piece male sleeve, the positioning pin and the inner pipe, so that an electrocoagulation loop is formed when the binding clip and the cutter bar clamp the conductive medium.

The cutter bar is insulated from the piezoelectric ceramic piece at the tail part of the transducer and the negative/positive conductive piece of the transducer, the piezoelectric ceramic piece is positioned between the negative/positive conductive pieces of the transducer, and converts electric energy into mechanical vibration when the power is on, and the mechanical vibration is transmitted to the cutter bar through the screw, so that the function of the ultrasonic cutter bar is realized.

Through the technical measures: solves the following technical problems and difficulties and brings certain technical effects and advantages: the radio frequency ultrasonic knife with the replaceable knife tube changes the loading and unloading mode of the knife tube assembly, so that the processing of parts is more convenient, and the operation is simpler and more convenient. The radio frequency signal input is separated from the ultrasonic signal input, so that the mutual interference of the two signals is avoided, and the radio frequency buttons are independently arranged, so that a doctor can conveniently select a radio frequency working mode, an ultrasonic working mode and a working mode of jointly outputting radio frequency and ultrasonic according to operation requirements. The slotted outer tube is convenient for cleaning and sterilizing.

The invention has the technical characteristics that:

1. The disposable knife tube component is invented, secondary cross infection is avoided, the cost of surgical materials is reduced, and the utilization efficiency of the knife bar (head) and the handle of the radio frequency ultrasonic knife is improved. The clamp head tetrafluoro pad on the radio frequency ultrasonic knife is a consumable product, once damaged, the metal knife head and the metal clamp head directly rub, so that the work of the whole radio frequency ultrasonic knife can be influenced, even the radio frequency ultrasonic knife is damaged, the service life of the knife bar is shortened, and the knife bar needs to be replaced in time.

2. The invention relates to a knob nut. The purpose of conveniently replacing the cutter tube assembly is achieved by screwing and unscrewing the knob nut. The shape of the knob nut can be hexagonal or other shapes.

3. The invention relates to a knob capable of being connected with a knob nut. The screw thread is arranged on the turn knob, so that the turn knob nut is conveniently screwed on and loosened and becomes a whole, on one hand, the turn knob nut and the turn knob form a space for limiting and sliding of the cutter tube assembly, on the other hand, the axial displacement of the cutter bar and the outer tube is limited, and meanwhile, the turn knob nut, the torque wrench and the torque wrench conversion device are matched to be used for connecting the cutter bar with the energy converter.

4. The invention can make the knob nut screw up the switching device of the torque spanner of the cutter arbor transducer. And is universal with the undetachable ultrasonic knife.

5. The L-shaped rotary pushing guide groove realizes quick replacement of the cutter tube assembly, is convenient for a user to detach and install, and is convenient for cleaning, disinfection and sterilization.

6. The slotting structure at the front end of the outer tube prevents residual tissues and blood water after operation from continuously polluting the inner tube and the outer tube, and is convenient for high-pressure flushing and cleaning of tissues or foreign matters between the inner tube and the outer tube.

7. According to the radio frequency ultrasonic knife, the silicon rubber ring is arranged to insulate the knife bar from the inner tube, and the front end knife head of the knife bar is used as the first stage of radio frequency. The outer surface of the outer tube and the outer surface of the clamp head are coated with insulating coatings to prevent electric leakage, and the inner surface is not coated with insulating coatings and can be used as the other conductive electrode. The clamp head is conductive through the inner tube and serves as the other pole. The radio frequency ultrasonic knife can be used as a bipolar coagulation forceps by supplying power to a radio frequency equipment host. ( Description: both high frequency and radio frequency refer to electromagnetic waves in a range of frequencies, both of which can be said to be equivalent in a broad sense. In the medical and electrical field, high frequencies are defined as devices operating in the frequency range 200kHz-5MHz, radio frequencies being said to be another term of high frequency. )

8. The radio frequency ultrasonic knife is provided with the independent radio frequency plug, radio frequency signals do not pass through the inside of the transducer, and mutual interference of ultrasonic and radio frequency signals is avoided. And a doctor can select which ultrasonic or radio frequency equipment to connect according to the operation requirement.

9. The radio frequency ultrasonic knife is provided with the independent radio frequency buttons, so that doctors can select the independent radio frequency working mode according to operation requirements.

Compared with the prior art, the invention has the following advantages and effects:

1. the invention has the greatest progress that the connecting structure of the prior application 1 in the background technology is optimized, so that the operation is simple and convenient, the maintenance is easy, the practicability is stronger, the push button nut is rotated and taken down, the outer tube is rotated to draw, the replacement of the outer tube and the inner tube in the disposable knife tube assembly can be rapidly completed under the condition that professional training and guidance are not needed, the push button nut can also be matched with a torque spanner and a torque spanner conversion device to limit force to screw the knife bar and the transducer, and the functions which cannot be realized in the prior application 1 are realized.

2. The invention discloses a knife tube assembly of a radio frequency ultrasonic knife replaceable structural member, which is characterized in that the structural design of the joint of an inner tube and an outer tube of a core component, a drag hook pipe fitting and other parts is optimized, simple parts are adopted, the structure is simple, the processing is convenient, the structure can be realized by various technological methods such as machining, laser cutting, electric spark machining and the like, and the parts are simpler than the scheme of the prior application 1.

3. The clamp head, the inner pipe and the outer pipe which are contacted with the human body part and the ultrasonic knife handle which is not contacted with the human body part of the radio frequency ultrasonic knife can be quickly disassembled, so that the knife tube assembly can be separated from the handle, and the radio frequency ultrasonic knife is convenient for a user to disassemble and install and is convenient for cleaning, disinfection and sterilization. The disposable knife tube assembly can ensure the continuous use of the ultrasonic knife handle in the service life by directly replacing the knife tube assembly with the clamp head part (the damage of the radio frequency ultrasonic knife is mostly clamp head damage), thereby avoiding secondary cross infection, reducing medical cost of patients, facilitating operation of the instrument by a surgeon, and improving the utilization efficiency of the knife bar (head) and the handle of the radio frequency ultrasonic knife.

4. The knob screw cap of the invention is provided with threads. The purpose of conveniently replacing the cutter tube assembly is achieved by screwing and unscrewing the knob nut. The shape of the knob nut is hexagonal, and other shapes such as square, octagon or other special shapes can be adopted. The adverse factors that the fixing screw affects the operation in the scheme of the prior application 1, such as hooking the medical pipeline, are avoided.

5. The turn knob capable of being connected with the turn knob nut has the advantages that the turn knob nut can be conveniently connected with the screw thread structure, the installation and the disassembly are convenient, the defect that the operation of the fixing screw is inconvenient in the scheme of the prior application 1 is avoided, because the diameter of the outer tube is 5mm at most, the diameter of the inner tube is only 3-4 mm, the diameter of the fixing screw matched with the outer tube sleeve and the inner tube is smaller than 2mm, the tail end of the screw cannot be too large and is about 5mm, the screw is extremely inconvenient for a doctor to wear the glove to rotate, and the operation difficulty is increased in a loose state after the fixing screw is screwed out of the threaded hole for a certain distance.

6. The torque wrench conversion device capable of using the knob nut to screw the cutter bar and the transducer is added to the torque wrench of the transducer, so that the torque wrench conversion device can be universal with the non-detachable ultrasonic cutter in the scheme of the prior application 2. One end of the conversion device corresponds to the torque wrench in shape, can be connected with the original torque wrench, and the other end corresponds to the knob nut in shape, and can be connected with the knob nut.

7. The cleaning tank structure at the front end of the outer tube prevents residual tissues and blood water after operation from continuously polluting the inner tube and the outer tube, and is convenient for high-pressure flushing and cleaning of tissues or foreign matters between the inner tube and the outer tube. Is a structure which is not provided in the original proposal, and has great benefit for cleaning the cutter tube assembly.

8. The handle of the radio frequency ultrasonic knife is provided with the independent radio frequency socket structure, the independent radio frequency plug, the wires and the respective conducting rings are attached, radio frequency signals do not pass through the internal wiring of the transducer, the structure of the ultrasonic transducer is prevented from being complex, and the mutual interference of ultrasonic and radio frequency signals is avoided. And a doctor can select which ultrasonic or radio frequency equipment to connect according to the operation requirement. The defects existing in the original scheme are avoided.

9. According to the radio frequency ultrasonic knife, the independent radio frequency buttons are arranged on the left and right sides of the handle, so that a doctor can select an independent radio frequency working mode according to operation requirements, and the doctor who is left-handed can select the radio frequency ultrasonic knife suitable for self operation.

10. According to the radio frequency ultrasonic knife, through the optimal design of the switch wiring mode, a doctor can select an ultrasonic working mode, a radio frequency working mode and a radio frequency and ultrasonic working mode through three different buttons.

Drawings

FIG. 1 is a schematic view of a RF ultrasonic knife with a replaceable knife tube, showing a torque wrench 12 engaged with a torque wrench transducer 13 through an outer tube and then engaged with a knob nut 6 for rotating a knob 5;

FIG. 2 is an enlarged schematic view of the layout of FIG. 2;

fig. 3 is a schematic top view of fig. 1 with the rf plug 10 and transducer 11 removed;

fig. 4 is a schematic view of the connection of the left front end outer tube 3 and the clamp head 1 in fig. 1;

fig. 5 is a schematic view of the connection of the inner tube 4 at the left front end of fig. 1 with the binding clip 1;

FIG. 6 is a schematic view of the left front part of the handle 7, the knob 5, the right rear part of the cutter bar 2 and the drag hook of FIG. 1;

fig. 7 is a schematic view of a blade tube assembly portion of a radio frequency ultrasonic blade with a replaceable blade tube.

Fig. 8 is a schematic perspective view of the connection mode and the installation direction between the outer tube 3, the inner tube 4 and the draw hook pipe fitting 8 in fig. 7;

fig. 9 is a perspective view of the retractor tube 8;

FIG. 10 is a schematic view of a force limiting assembly 32 for driving the retractor tube 8 axially within the handle in a tube-replaceable RF ultrasonic blade;

Fig. 11 is a schematic diagram of a torque wrench 12 and a torque wrench converting device 13 according to an embodiment;

fig. 12 is a schematic view of the cleaning hole 19 of the outer tube 3 in the embodiment;

FIG. 13 is a schematic diagram of circuit wiring patterns of RF, ultrasonic, RF plus ultrasonic modes of operation in an embodiment;

fig. 14a, 14b, 14c are schematic structural views of another embodiment of a torque wrench and torque wrench switching device according to the examples.

Wherein: 1-binding clip, 2-knife bar, 2-1-silicone ring, 3-outer tube, 4-inner tube, 5-knob, 6-knob nut, 7-ultrasonic knife handle, 8-draw hook tube, 9-pin, 10-radio frequency plug (with wire), 11-transducer (with wire), 111-piezoceramic wafer, 112-screw, 151-transducer negative electrode conductive wafer, 152-transducer positive electrode conductive wafer, 12-torque wrench, 12-1-mating through hole, 12-2-mating nut, 123-handle, 124-dovetail groove, 125-dovetail groove bottom edge, 13-torque wrench conversion device, 13-1-nut mating notch, 13-2 nut mating notch, 133-U-groove, 134-boss, 135-hook, 136-anti-slip nut, 137-rib, 14-radio frequency device host, 15-ultrasonic device host, 16-radio frequency push button switch (both sides), 17-ultrasonic push button, 18-radio frequency plus ultrasonic push button, 19-cleaning hole, 20-transducer plug, 21-transition piece male sleeve, 22-knife tube assembly { clip, 23-female clip, 23-nut, 23-female clip, 25-male die, 25-female die, and 8-female die, 25-female die, and female die, axial die-coupling, and positioning tube fitting, axial positioning of the outer tube, and positioning tube fitting and axial positioning of the tube and tube fitting, 2-9-round holes at one end of the inner tube, 30-clamp head pins, 31-clamp head protruding cylinders, 32-force limiting component inner sleeves, 33-force limiting component hooking holes, 34-JD 1-inner closing conducting rings, JD 3-cutter bar conducting rings, 40-convex rings, 41-outer tube male sleeves, 111-piezoelectric ceramics and 112-screws.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

example 1:

as can be seen from fig. 1, 2, 3, 4, 5, 6, 7 and 11, the rf ultrasonic blade capable of rapidly replacing the blade tube comprises a blade tube assembly 22, a drag hook pipe fitting 8, an ultrasonic blade handle 7, an rf plug (with wire) 10, a transducer (with wire) 11, a torque wrench 12 and a torque wrench conversion device 13. The knife tube assembly 22, the drag hook pipe fitting 8 and the pin 9 are all made of medical stainless steel materials through machining. The cutter bar 2 is made of titanium alloy material through machining. The clamp head 1 is embedded with a polytetrafluoroethylene material for polytetrafluoroethylene pad and is manufactured by mechanical processing or compression molding. The ultrasonic knife handle 7, the radio frequency plug 10, the torque wrench 12, the torque wrench conversion device 13, the radio frequency button switch 16 (two sides), the ultrasonic button 17, the radio frequency and ultrasonic button 18, the handle wrench 23 and the like are formed by injection molding of plastic materials such as PC or ABS through a mold. The round holes 28, the square holes 29, the axial sliding positioning guide grooves 24 and the L-shaped rotary pushing guide grooves 25 in the inner tube and the outer tube, the clamping grooves 26 and the like are formed by laser cutting, electric spark or fine blanking.

A radio frequency ultrasonic knife capable of quickly replacing a knife tube comprises a knife tube assembly 22, a draw hook pipe fitting 8, an ultrasonic knife handle 7, a radio frequency plug (with a wire) 10, a transducer (with a wire) 11, a torque wrench 12 and a torque wrench conversion device 13. The force limiting assembly 32 and the first, second, third and handle wrenches JD3, JD1, JD4, 23 inside the rf ultrasonic blade handle 7 are consistent with the prior application 1 solution. The radio frequency socket 27, the radio frequency button switch 16 (on both sides of the ultrasonic knife handle) and the redefined ultrasonic buttons 17, the radio frequency plus ultrasonic buttons 18 and their wiring patterns are added by improving the ultrasonic knife handle 7 as shown in fig. 13. A radio frequency plug 10 is added. The scheme of the invention innovates the connection mode of the knife tube assembly 22 and the drag hook pipe fitting 8, so that the knife tube is more convenient to replace, the operation of the small fixing screw is not needed, the radio frequency button switch 16 and the radio frequency plug 10 are innovatively provided, the doctor can increase the selection of the operation mode in operation, and the defects of the scheme of the prior application 2 are abandoned (the radio frequency signal input is separated from the ultrasonic signal input, the mutual interference of the two signals is avoided, and the radio frequency button is independently arranged, so that the doctor can conveniently select the radio frequency operation mode, the ultrasonic operation mode and the operation mode of the common output of radio frequency and ultrasonic according to the operation requirement). Referring to fig. 1, 6 and 13, one end of a first conductive ring JD3 is communicated with a cutter bar 2 through a pin 9, and the other end is connected with a radio frequency socket 2-7; one end of the second conductive ring JD1 is sequentially connected with the drag hook pipe fitting 8, the positioning pin 27 and the inner pipe 4 (when the transition piece male sleeve and the inner pipe are arranged as a whole as an embodiment)/the transition piece male sleeve 21, the inner pipe 4 and the clamp head 1 through the force limiting group 32, and the other end is connected with the radio frequency push button switch 16 and the radio frequency and ultrasonic push button 18; one end of the third conductive ring JD4 is connected with an ultrasonic equipment host 20 through an ultrasonic button 17, and the other end is connected with the ultrasonic equipment host 20 and a radio frequency plug 10 in parallel through a radio frequency and ultrasonic button 18; the rf plug 10 and the rf sockets 2-7 are used for connecting to the rf device 14. In fig. 13, the rf plus ultrasonic button 18 is closed to make the rf device and the ultrasonic device host operate simultaneously, and because the ultrasonic device host transmits an electrical signal to the transducer negative electrode conductive sheet 151 and the transducer positive electrode conductive sheet 152 through wires, the piezoelectric ceramic 111 located between the transducer negative electrode conductive sheet 151 and the transducer positive electrode conductive sheet 152 is driven to vibrate, and according to the principle structure of the transducer 11, the transducer negative electrode conductive sheet 151, the transducer positive electrode conductive sheet 152 and the piezoelectric ceramic are insulated from the transducer, the current does not pass through the transducer 11, and after the screw 112 of the transducer is connected with the cutter bar 2, the cutter bar can be driven to vibrate. The RF and ultrasonic button 18 is a linkage switch, so that the circuit of the RF equipment is insulated from the circuit of the ultrasonic equipment host, and the RF equipment 14 is also connected with the inner tube 4 and the cutter bar 2 through the RF and ultrasonic button 18 and the first conductive ring JD3 to form a bipolar electrocoagulation circuit; when the radio frequency plus ultrasonic button 18 is opened, only the ultrasonic button 17 or the radio frequency button switch 16 is closed, and only the function of ultrasonic vibration or radio frequency electric coagulation is realized.

In fig. 4 to 5, the inner tube 4 of the cutter tube assembly 22 concentrically passes through the outer tube 3, the front ends of the inner tube 4 and the outer tube 3 are respectively hinged with the clamp head 1, as shown in fig. 6 to 7, the cutter tube assembly 22 is a detachable independent assembly, one end of the cutter bar 2 is connected with the handle 7, the other end passes through the inner tube 4 to be matched with the clamp head 1, and the clamp head 1 is hinged with a round hole 29 at the front end (the left end in fig. 4) of the inner tube 4 through a clamp head pin 30. The binding clip 1 is hinged with a square hole 28 at the front end (left end in fig. 5) of the outer tube 3 through a binding clip protruding cylinder 31. The clamp head 1 is rotated around the square hole 28 to be matched with the cutter bar 2 by moving the inner tube 4.

As shown in fig. 8 and 9, the following embodiments are preferred because of the advanced industry specifications, the outer tube diameter is about 5 mm: the rear end of the outer tube 3 is sleeved into the outer tube male sleeve 41 for fixation, the inner tube 4 is sleeved into the transition piece male sleeve 21 for fixation, a continuous L-shaped rotary pushing guide groove 25 and an axial sliding guide groove 24 are sequentially formed from the right end of the outer tube male sleeve 40 to the left, a pair of positioning pins 27 are symmetrically arranged on the circumferential surface of the right end of the transition piece male sleeve 21 outwards and inwards, the height of each positioning pin is 0.5mm, a continuous clamping groove 26 and the L-shaped rotary pushing guide groove 25 are formed from the left end of the draw-hook pipe fitting 8 to the right, during assembly, the positioning pins on the transition piece male sleeve 21 are pushed into the draw-hook pipe fitting 8 from the L-shaped rotary pushing guide groove 25 and then clamped into the clamping grooves 26 after rotating, so that the draw-hook pipe fitting 8 is fixedly matched with the inner tube 4 along the axial direction, the diameter of the draw-hook pipe fitting 8 is smaller than that of the transition piece male sleeve, the sleeve is sleeved on the inner side of the transition piece male sleeve, the positioning pins 27 on the transition piece male sleeve 21 are pushed into the axial sliding guide grooves 24 in the outer tube male sleeve 41 from the L-shaped rotary pushing guide groove 25, the inner tube 4 is sleeved in the inner tube 3 along the axial sliding guide groove 24, the inner tube 4 is axially sliding guide grooves 24 in the axial sliding guide grooves 24 in the inner tube sliding guide grooves, the inner tube 4 sliding guide grooves 4 are axially, the inner tube 4 sliding guide grooves 4 sliding the outer tube 4 sliding guide grooves 4 and the inner tube 4 sliding the outer tube 4 and the outer tube 4 sliding the inner tube 4 and the outer tube 4 sliding the outer tube 4 and the outer tube 4 sliding the outer tube 4 and the outer rod 4, the outer tube 4 and the outer rod 4 body 4 and the outer rod 4 are the outer rod.

As an implementation mode, the predictable locating pin is arranged to protrude out of the transition piece male sleeve only by 1-2 mm, the retractor pipe fitting is designed to be larger than the transition piece male sleeve and smaller than the outer pipe male sleeve in diameter, and the connection mode can be realized.

As an embodiment, the outer tube male sleeve and the outer tube in the above scheme can be designed as a whole, the end of the outer tube is provided with an outwards turned reducing section, the diameter of the section is larger than that of the non-turned part of the outer tube, and a convex ring is arranged at the starting end of the outwards turned reducing section, which is substantially the same as the scheme.

As an implementation scheme, the inner pipe and the transition piece male sleeve in the scheme can be designed into an integral inner pipe, symmetrical positioning pins are arranged on the inner surface and the outer surface of the end part of the inner pipe, or the positioning pins are arranged on the outer surface of the end part of the inner pipe, and on the basis of the scheme, or the end part of the inner pipe is provided with a variable-diameter section which is turned inwards or outwards, so that the hook connection of a draw hook pipe fitting and the positioning pins can be realized, and the draw hook pipe fitting is substantially the same as the scheme.

As an embodiment, the direction A-A in 14a is the direction A-A in fig. 11, fig. 14b is a perspective view of the torque wrench converting device, fig. 14c is a cross-sectional view of the torque wrench converting device, the profile through hole 12-1 of the torque wrench is circular, and a force limiting groove 124 is disposed inside the profile through hole, the force limiting groove is preferably a trapezoid groove, the inclined edges are 28 degrees, four force limiting grooves are uniformly distributed along the circumference of the profile through hole, and the lower bottom of the force limiting groove faces the center of the profile through hole; the nut matching notch 13-1 of the torque wrench conversion device extends along the axial direction, the top end of the nut matching notch is outwards turned to form a boss 134, and two U-shaped grooves 133 are symmetrically arranged along the axial direction at the top end of the nut matching notch, so that symmetrical hooks 135 are formed at the top end of the nut matching notch; the anti-slip nut 136 is sleeved and fixed at one end of the nut matching notch and one end of the torque wrench conversion device 13, and convex strips 137 are uniformly distributed along the periphery of the anti-slip nut; after the nut matching notch is sleeved with the matching nut 12-2, the convex strip is inserted into the trapezoid groove, the torque wrench is in force-limited rotation connection with the torque wrench conversion device relatively, when the screwing force is overlarge, the convex strip can slide out from the inclined edge of the trapezoid groove, the screwing direction of the inclined edge of the trapezoid groove is opposite to that of the screw of the transducer, when the torque wrench and the torque wrench conversion device are used for rotating the knob nut, the tool bar and the transducer can be prevented from sliding, the nut matching notch 13-1 is in a circular column shape, the matching nut 12-2 is also in a circular column shape, the matching nut and the nut matching notch are in clearance fit, and the hook 135 is used for preventing the torque wrench from reversing relatively to the torque wrench conversion device.

The right end of the inner tube 4 and the transition piece male sleeve 21 can be fixed by adopting a medical stainless steel material in a welding mode (such as laser welding, brazing welding and the like) or can be fixed by adopting a riveting mode. The knob nut can be manufactured by PC, ABC or other plastic injection molding.

As shown in fig. 8, the middle part of the right end of the draw-hook pipe fitting 8 is provided with a draw-hook pipe fitting chute 28, the right end of the draw-hook pipe fitting chute is also provided with a force limiting component hooking hole 33, insulating paint is coated on the inner side of the draw-hook pipe fitting chute 28, polytetrafluoroethylene is put in, fig. 2 and 8, the cutter bar 2 passes through the draw-hook pipe fitting, after the draw-hook pipe fitting is sleeved with the turn knob 5, the pin 9 passes through the through hole at the rear end of the turn knob, the draw-hook pipe fitting chute 8 and the positioning hole 34 in sequence, the turn knob 5 is fixedly connected with the cutter bar, the draw-hook pipe fitting is only in limited sliding connection in the draw-hook pipe fitting chute 28 in the axial direction, the pin 9 and the cutter bar 2 are not insulated in the positioning hole 34, as shown in fig. 10, the right side of the draw-hook pipe fitting 8 is provided with a force limiting component hooking hole 33, the force limiting component 32 is connected into a whole, the force limiting component 32 can be installed inside the ultrasonic cutter handle 23, the turn, the force limiting component 32 is connected with the handle 23, the handle 8 is opened and closed with the handle 23, and the transition piece 21 and the inner pipe 4 are driven to reciprocate linearly in the turn. The right end of the cutter bar 2 concentrically passes through the drag hook pipe fitting 8 and the force limiting component 32, as shown in fig. 2 and 6, the knob 5 can be fixed on the ultrasonic cutter handle 7; the knob 5 is fixed on the ultrasonic knife handle 7 and can rotate 360 degrees circumferentially. The drag hook pipe fitting 8 can be made of medical stainless steel materials, and the handle 7 and the structural components inside the drag hook pipe fitting can be made of PC, ABC or other plastic injection molding.

The axial sliding guide groove 24, the clamping groove 26 and the L-shaped rotary pushing guide groove 25 can be processed by laser cutting, spark machining, fine blanking machining and other technological methods. Compared with the original scheme, the processing is simpler, and the loading and unloading are more convenient. The movement of the inner tube 4 is achieved by hooking with the retractor tube 8.

The knob nut 6 is provided with a thread. The purpose of conveniently replacing the cutter tube assembly 22 is achieved through screwing and unscrewing the knob nut 6. The knob nut 6 has a hexagonal shape, but may have other shapes such as square, octagon or other special shapes. The disadvantage of the fixation screw affecting the procedure in the solution of the prior application 1 is avoided. The male outer tube sleeve 41 is provided with a convex ring 40, the diameter of the male outer tube sleeve is larger than the diameter of the male transition piece sleeve 21 and smaller than the sum of the height sum of a pair of positioning pins 27 outside the male transition piece sleeve 21 and the diameter sum of the male transition piece sleeve, so that after the male outer tube sleeve is sleeved with the male transition piece sleeve, the positioning pins are exposed outside the circumference of the male outer tube sleeve, as shown in fig. 2, the convex ring 40, the pin 9 and the knob nut 6 connected with the knob 5 enable the outer tube 3 not to move leftwards in the axial direction, and the male outer tube sleeve stop knob 5 enables the outer tube 3 not to move leftwards and rightwards in the axial direction and the cutter bar cannot move leftwards and rightwards in the axial direction.

When in connection, the drag hook pipe fitting is close to the transition piece male sleeve connected with the inner pipe, and is close to one end provided with the positioning pin, the transition piece male sleeve is pushed in, so that the positioning pin enters the L-shaped rotary pushing guide groove of the drag hook pipe fitting and then rotates, and the positioning pin is clamped into the clamping groove; then the outer pipe male sleeve connected with the outer pipe passes through the inner pipe and is close to the transition piece male sleeve, the outer pipe male sleeve is pushed in, the positioning pin enters the L-shaped rotary pushing guide groove of the drag hook pipe fitting, and then the positioning pin rotates, so that the positioning pin enters the axial sliding guide groove; penetrating the knob and the knob nut from one side of the outer tube and one side of the draw hook pipe fitting respectively, and tightly closing and screwing to assemble the cutter pipe assembly; then the cutter bar passes through the cutter tube assembly, so that a positioning hole of the cutter bar is aligned with a through hole of the knob nut, the cutter bar is fixed by penetrating a pin, and the force limiting assembly passes through the cutter bar and is clamped into a force limiting assembly hooking hole of the draw hook pipe fitting; and finally, installing the knob nut and the force limiting assembly in the ultrasonic knife handle, holding the handle wrench to open and close for several times, and connecting the knife tube assembly and the radio frequency ultrasonic knife handle after the clamp head and the knife head are inspected to open and close normally. When the tool is disassembled, the knob nut is rotated and loosened, the tool bar is rotated by 90 degrees anticlockwise, the outer tube and the inner tube are pulled out from the tool bar, and the separation of the tool tube assembly and the handle part of the radio frequency ultrasonic tool can be realized; when the transducer needs to be connected, the transducer is inserted into an ultrasonic slot at the rear part of the ultrasonic knife handle, and simultaneously the torque wrench conversion device and the torque wrench penetrate through the knife tube assembly in sequence to be clamped with the knob nut, the knife tube assembly can be driven to rotate in the ultrasonic knife handle by rotation, the screw of the transducer is aligned with the transducer coupling hole of the knife bar, and the installation can be completed by rotation and fastening.

As shown in fig. 1 and 11, the torque wrench 12 is matched with the torque wrench conversion device 13, the knob nut 6 drives the knob 5 to screw the cutter bar 2 to rotate, and the torque wrench is connected with the screw of the transducer 11, the knob conversion device 13 is provided with a matching notch 13-2 of the torque wrench with different ends, and one end of the torque wrench is the same as the matching nut 12-2 in cross section like a hexagon, and the torque wrench and the matching notch are mutually corresponding and can be matched. The other end is the same as the cross section of the matching through hole 12-1 of the torque wrench 12, and corresponds to each other, and can be matched. The shape of the matching notch 13-1 of the knob nut used for transmitting force at one end of the torque wrench conversion device 13 corresponds to the shape of the matching nut 12-2a of the torque wrench 12, so that the torque wrench conversion device can be connected with the original torque wrench 12, and the shape 13-2 of the matching notch of the torque wrench used for transmitting force at the other end corresponds to the shape of the knob nut 6, so that the knob nut 6 can be connected. See fig. 11. The knob nut 6 has a hexagonal shape, but may have other shapes such as square, octagon or other special shapes.

As can be seen from fig. 12, in order to facilitate cleaning and sterilizing the knife tube assembly 22, a plurality of waist-shaped cleaning tanks 19 are opened at one end of the outer tube 3 close to the forceps head 1, so as to avoid the continuous pollution of residual tissues and blood water after operation to the inner tube and the outer tube, and facilitate high-pressure cleaning and cleaning of tissues or foreign matters between the inner tube and the outer tube. The cleaning tank can adopt round, square or other special-shaped windows, and can be obtained by means of laser cutting, electric spark machining or the like.

The clamp head 1 on the RF ultrasonic knife tube assembly 22 insulates the outer surface thereof through a surface insulation treatment process, the inner surface is conductive, the inner surface of the clamp head 1 is electrically connected with the inner tube 4, the RF plug 10 is inserted into the RF socket 27 on the handle 7, and an RF loop is formed with the knife bar 2 (also through the RF socket 27 and the RF plug 10 on the handle 7), as shown in fig. 13. In the tissue clamped by the inner surface of the forceps head 1 and the cutter bar 2, the tissue is coagulated and cut under the action of the radio frequency current. The surface insulation treatment mode is obtained by spraying polytetrafluoroethylene paint, and can also be spraying epoxy paint, ceramic paint and the like.

The radio frequency ultrasonic knife handle 7 is provided with a radio frequency button switch 16 (both the left side and the right side) which is convenient for a user with a left hand or a right hand to select which hand is more convenient for holding the radio frequency ultrasonic knife for operation, and the radio frequency button switch 16 is pressed by the thumb.

In summary, the radiofrequency ultrasonic knife of the invention can realize quick separation between the knife tube assembly 22 formed by the clamp head 1, the inner tube 4, the outer tube 3 and the flower knob nut 6 and the ultrasonic knife handle 7 contacting with the human body, and can be conveniently cleaned, disinfected and sterilized afterwards, or the knife tube assembly 22 formed by the clamp head 1, the inner tube 4 and the outer tube 3 is replaced for disposal as medical waste, thereby realizing the repeated use of the ultrasonic knife handle 7.

In summary, the RF ultrasonic blade of the present invention is provided with an individually controlled RF button switch 16. And the ultrasonic button 17 and the ultrasonic adding button 18 arranged at the front part of the ultrasonic knife handle 7 can be used for realizing that a doctor can select a radio frequency working mode, an ultrasonic working mode or an ultrasonic adding radio frequency working mode according to the operation requirement by selecting a button mode. The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the teachings of the present invention, should make improvements and modifications within the scope of the present invention.

Claims

1. The radio frequency ultrasonic knife with the replaceable knife tube comprises a knife tube assembly, a knife bar, a clamp head, an ultrasonic knife handle, a flower knob and a draw hook pipe fitting, and is characterized in that one end of the knife bar penetrates through the draw hook pipe fitting and is fixed with the flower knob through a pin, the flower knob is clamped at the end part of the ultrasonic knife handle, and the other end of the knife bar penetrates through the knife tube assembly and is matched with the clamp head;

One end of the draw hook pipe fitting is provided with a clamping groove, the other end of the draw hook pipe fitting is hooked with the interior of the ultrasonic knife handle, a pin penetrates through a draw hook pipe fitting sliding groove in the middle of the draw hook pipe fitting, and the pin moves linearly and reciprocally along the axial direction along with the opening and closing of the ultrasonic knife handle wrench; an ultrasonic slot is arranged at the rear part of the ultrasonic knife handle, and the ultrasonic slot can be matched with the transducer;

the torque wrench comprises a matched nut and a handle, wherein a matched through hole penetrates through the matched nut and the handle and is used for enabling an outer tube to penetrate through;

The torque wrench is characterized in that the matching through holes of the torque wrench are circular, the inner sides of the matching through holes are provided with limited force grooves, at least two force limiting grooves are arranged, the force limiting grooves are uniformly distributed along the circumferences of the matching through holes, and the bottoms of the force limiting grooves face the center of the matching through holes; the nut matching notch of the torque wrench conversion device extends along the axial direction, the top end of the nut matching notch is outwards turned to form a boss, and at least two U-shaped grooves are symmetrically arranged at the top end of the nut matching notch along the axial direction, so that symmetrical hooks are formed at the top end of the nut matching notch; an anti-slip nut is sleeved and fixed at one end of the nut matching notch and one end of the torque wrench conversion device, and convex strips are uniformly distributed on the periphery of the anti-slip nut; after the nut matching notch is sleeved with the matching nut, the convex strip is inserted into the trapezoid groove, and the torque wrench is in force-limited rotary connection relative to the torque wrench conversion device;

2. The rf ultrasonic blade of claim 1, wherein the outer tube has a diameter at the outwardly turned diameter-reducing section that is larger than the diameter of the outer tube for axially defining the movement of the outer tube in cooperation with the knob and for engaging the retractor tube.

3. The radio frequency ultrasonic knife with the replaceable knife tube according to claim 1, wherein the drag hook pipe fitting is provided with a limited force component hooking hole at one end of the ultrasonic knife handle side, the limited force component is arranged in the ultrasonic knife handle, and the limited force component is hooked with the drag hook pipe fitting through the limited force component hooking hole and used for driving the inner joint to move along the axial limit through the drag hook pipe fitting.

4. The ultrasonic knife of the replaceable knife tube according to claim 1, wherein one end of the knob is provided with threads, and the knob is in threaded connection with a knob nut, so that the knife tube assembly is fixed on the handle of the ultrasonic knife, and the other end of the knife tube assembly is provided with a through hole, and the knife bar is fixed by passing a pin through the through hole and a positioning hole of the knife bar in a matched manner.

5. The ultrasonic blade of the interchangeable blade tube of claim 1, wherein the end of the blade bar on the handle side of the ultrasonic blade is provided with a transducer coupling aperture.

6. The radio frequency ultrasonic knife with the replaceable knife tube according to claim 1, wherein one end of the transducer is provided with a screw, the other end of the transducer is sleeved with an insulating sleeve, a piezoelectric ceramic ring and an electrode slice ring are arranged on the surface of the insulating sleeve at intervals, the screw is in threaded connection with a knife bar and used for transmitting mechanical vibration, and the electrode slice ring is insulated from the knife bar.