阅读说明：本技术 一种用于植入圆窗激振式人工中耳作动器的手术器械 (Surgical instrument for implanting round window excitation type artificial middle ear actuator ) 是由 刘后广 王贺贺 郝敬宾 杨雅涵 杨建华 刘送永 江红祥 王思扬 张雨蒙 薛林 于 2019-09-18 设计创作，主要内容包括：本发明公开了一种用于植入圆窗激振式人工中耳作动器的手术器械,包括操纵装置、管状元件、驱动杆、可旋转支架和执行装置。操纵装置包括握柄、钳夹促动器、锁紧滑块和钳夹调节旋钮。锁紧滑块置于握柄的内部,并与握柄成移动副相连接。钳夹促动器固定于握柄内部,并能够绕其转动中心进行旋转；钳夹促动器置于握柄内部的一端与锁紧滑块相配合,钳夹调节旋钮为设于握柄外部侧面的可旋转构件。管状元件为一个细长的空心管件。驱动杆置于管状元件的内部,并与管状元件成移动副相接触。可旋转支架能够调整其位于管状元件上的轴向位置。优点：能够简化作动器在圆窗处植入的手术操作流程。(The invention discloses a surgical instrument for implanting a round window excitation type artificial middle ear actuator. The manipulating device comprises a grab handle, a jaw actuator, a locking slide block and a jaw adjusting knob. The locking slide block is arranged in the grab handle and is connected with the grab handle in a moving pair way. The jaw actuator is fixed inside the grab handle and can rotate around the rotation center of the jaw actuator; the forceps holder actuator is arranged at one end inside the grab handle and is matched with the locking slide block, and the forceps holder adjusting knob is a rotatable component arranged on the outer side surface of the grab handle. The tubular element is an elongated hollow tube. The drive rod is disposed within the tubular member and is in moving secondary contact with the tubular member. The rotatable support is capable of adjusting its axial position on the tubular element. The advantages are that: the operation flow of the actuator implanted at the round window can be simplified.)

1. A surgical instrument for implanting a round window excited artificial middle ear actuator, comprising: comprises a manipulating device (100), a tubular element (90), a driving rod (80), a rotatable bracket (200) and an executing device (300, 400);

the manipulation device (100) comprises a grip (110, 160), a jaw actuator (120, 170), a locking slider (130), and a jaw adjustment knob (140); the locking slider (130) is arranged inside the grab handle (110, 160) and is connected with the grab handle (110, 160) in a moving pair way; the jaw actuator (120, 170) is fixed inside the grip (110, 160) and can rotate around the rotation center thereof; the jaw actuator (120, 170) is arranged at one end inside the handle (110, 160) and is matched with the locking slide block (130), and the slide block (130) can be driven to move by gripping the jaw actuator (120, 170); the jaw adjusting knob (140) is a rotatable member provided on an outer side surface of the grip (110, 160);

the tubular element (90) is an elongated hollow tube, and the rear end of the tubular element (90) is in threaded connection with the operating device (100); the rotatable bracket (200) and the executing devices (300, 400) are respectively screwed on the outer side and the inner side of the front end of the tubular element (90);

the driving rod (80) is arranged inside the tubular element (90) and is in moving pair contact with the tubular element (90), the driving rod (80) extends out from two ends of the tubular element (90), the rear end of the driving rod is fixed inside the operating device (100), the front end of the driving rod is hinged with the executing device (300, 400),

the rotatable support (200) is capable of adjusting its axial position on the tubular element (90), the rotatable support (200) being simultaneously capable of any angular adjustment of its support angle,

the actuating device (300, 400) clamps the actuator (60) and adjusts the axial displacement of the actuator (60) through the cooperation of the operating device (100) and the driving rod (80); the actuating device (300, 400) is connected with the jaw adjusting knob (140) through a steel wire rope (70), the steel wire rope (70) is restrained on the outer side of the tubular element (90), and the opening and closing of the actuating device (300, 400) can be adjusted by rotating the jaw adjusting knob (140).

2. A surgical instrument for implantation of a round window excited artificial middle ear actuator as claimed in claim 1, wherein: the grab handle (110, 160) is a hollow shell with the size and the shape suitable for being held by hands, and a guide rail (112) and a fixed shaft (111, 161) are arranged inside the grab handle; the middle position of the locking sliding block (130) is a cylinder, square bodies with the same thickness are arranged at two ends of the cylinder respectively, the square bodies are matched with the guide rail (112) and are in contact with the moving pairs, the circumferential rotation of the locking sliding block (130) can be limited, and the locking sliding block (130) slides along the guide rail (112); the central point of locking slider (130) puts and is equipped with the circular through-hole that matches with actuating lever (80), one side of locking slider (130) is equipped with a locking screw (131), the circular through-hole of the central point that locking slider (130) was put is passed to actuating lever (80) rear end to it fixes actuating lever (80) to adjust locking screw (131) through screw regulation hole (113) externally, locking screw (131) can not influence the motion of locking slider (130).

3. A surgical instrument for implantation of a round window excited artificial middle ear actuator as claimed in claim 2, wherein: the upper parts of the jaw actuators (120, 170) are vertically provided with square through holes (122), the square through holes (122) are matched with the driving rod (80) and the locking slider (130) respectively, the jaw actuators (120, 170) are connected with the fixed shafts (111, 161) on the handles (110, 160) through rotating pairs, the jaw actuators (120, 170) are provided with elastic bodies (121), the elastic bodies (121) can enable the jaw actuators (120, 170) to be kept at fixed positions, the locking slider (130) can be driven to slide along the guide rail (112) when the jaw actuators (120, 170) are gripped, and after the gripping force of the jaw actuators (120, 170) is removed, the elastic bodies (121) provide restoring force for the jaw actuators (120, 170), so that the jaw actuators (120, 170) and the locking slider (130) can restore to the original positions; the square through hole (122) does not interfere with movement of the lock slide (130) and the drive rod (80) relative to the counter-jaw actuator (120, 170).

4. A surgical instrument for implantation of a round window excited artificial middle ear actuator as claimed in claim 1, wherein: the outer side of the tubular element (90) is provided with a plurality of positioning rings (91) for passing through and restraining the position of the steel wire rope (70), the rear end of the tubular element (90) is provided with internal threads, and the front end of the tubular element (90) is respectively provided with internal threads and external threads.

5. A surgical instrument for implantation of a round window excited artificial middle ear actuator as claimed in claim 1, wherein: the rotatable support (200) comprises a special bearing (210), a support (220) and a locking nut (230), wherein an inner thread matched with an outer thread at the front end of the tubular element (90) is arranged on the inner side of an inner ring of the special bearing (210), a support rod (211) is arranged on one side of an outer ring of the special bearing (210), a thread is arranged at the outer end of the support rod (211), the support (220) is connected with the support rod (211) in a rotating pair mode, and the locking nut (230) is in threaded connection with the support rod (211) so as to limit the axial displacement of the support (220).

6. A surgical instrument for implantation of a round window excited artificial middle ear actuator as claimed in claim 1, wherein: execution apparatus (300) includes base (330), jaw components (310), ratchet (320), pawl (340), base (330) are hollow cylinder type structure, and the rear end is equipped with the external screw thread with tubular element (90) front end internal thread matched with, base (330) front end is the symmetric position and is equipped with a pair of bow-shaped cantilever (331), bow-shaped cantilever (331) top is equipped with an annular through hole (332), annular through hole (332) are the contralateral circular through-hole that is the plane, stretch out and articulate with pawl (340) in actuating lever (80) from base (330), pawl (340) cooperate with ratchet (320).

7. A surgical instrument for implantation of a round window excited artificial middle ear actuator as claimed in claim 6, wherein: the ratchet wheel (320) is characterized in that a through hole with internal threads is formed in the center of the ratchet wheel (320), the diameter of the internal threads is equal to that of the annular through hole (332), the ratchet wheel (320) is arranged in the middle of the arched cantilever (331) and is arranged on the same axis with the annular through hole (332), and the thickness of the ratchet wheel (320) is equal to the spacing distance of the arched cantilever (331).

8. A surgical instrument for implantation of a round window excited artificial middle ear actuator as claimed in claim 6, wherein: the clamp assembly (310) comprises a clamp main body (311), a side clamp (312), a pressing piece (313) and a threaded rod (315), the threaded rod (315) is arranged on the side face of the upper portion of the clamp main body (311), the cross section of the threaded rod (315) is matched with an annular through hole (332), the threaded rod (315) penetrates through the annular through hole (332) and is connected with a ratchet wheel (320) through a thread pair, the annular through hole (332) can limit circumferential rotation of the threaded rod (315), the side clamp (312) is hinged to the thread main body (311), one end of the pressing piece (313) is fixedly connected with the clamp main body (311), the other end of the pressing piece presses the side clamp (312) to provide clamping force for the side clamp (312), and a clamping ring (314) used for fixing the steel wire rope (70) is arranged on the pressing piece (313).

9. A surgical instrument for implantation of a round window excited artificial middle ear actuator as claimed in claim 1, wherein: execution device (400) includes base (430), connecting rod (420), jaw components (410), base (430) are hollow cylinder type structure, and the rear end is equipped with the external screw thread with tubular element (90) front end internal thread matched with, the front end rear side of base (430) is equipped with backup pad (431), the top of backup pad (431) is equipped with guide bar (432) of cylinder type, stretch out and articulate with the one end of connecting rod (420) in actuating lever (80) from base (430).

10. A surgical instrument for implantation of a round window excited artificial middle ear actuator as claimed in claim 1, wherein: the clamp assembly (410) comprises a clamp main body (411), a side clamp (312) and a pressing piece (313), wherein a circular through hole matched with the guide rod (432) is formed in the middle upper portion of the clamp main body (411), the clamp main body (411) is in contact with the guide rod (432) through a moving pair, the upper portion of the clamp main body (411) is hinged to the other end of the connecting rod (420), the side clamp (312) is hinged to the clamp main body (411), one end of the pressing piece (313) is fixedly connected with the clamp main body (411), the other end of the pressing piece (312) provides clamping force for the side clamp, and a clamping ring (314) used for fixing the steel wire rope (70) is arranged on the pressing piece (313).

Technical Field

The present invention relates to a medical instrument device for otology surgery. More particularly, the present invention relates to a surgical instrument for implanting a round window excited artificial middle ear actuator.

Background

Hearing impairment is one of the common diseases affecting human daily life, and is classified into conductive hearing impairment, sensorineural hearing impairment and mixed hearing impairment according to different mechanisms of hearing impairment. With the continuous deepening of otology research and the rapid development of ear microsurgery, most of patients with conductive hearing impairment can improve the hearing through operations, but the hearing is generally improved by wearing a traditional hearing aid for sensorineural hearing impairment at present. However, the conventional hearing aid has the problems of small output gain (unable to compensate for high-degree hearing impairment), accompanying acoustic feedback, blocked auditory canal and the like, many patients are unwilling to wear the hearing aid, and people with external auditory canal infection are even unable to wear the hearing aid. Therefore, many research institutes at home and abroad compete to research the implantable hearing aid device, and the artificial middle ear is one of the devices.

The artificial middle ear is mainly composed of four parts, namely a microphone, a signal processing module, a power supply and an actuator implanted in a human body. Wherein the actuator is a component of the middle core of the artificial middle ear. In the working process of the artificial middle ear, firstly, an external sound signal is collected by a microphone, then the sound signal collected by the microphone is converted into an electric signal after being subjected to noise reduction, amplification, filtering and the like by a signal processing module, the electric signal is applied to an actuator to serve as a driving source of the actuator, the actuator vibrates under the action of an input driving electric signal, and ear tissues coupled with the actuator are driven to vibrate, so that a patient can sense the sound. Artificial middle ear is classified into various types such as an incus excitation type, a tympanic excitation type, and an incus long process excitation type according to the difference of the tissues of human ears driven by actuators. The artificial middle ear needs the patient to have a perfect ossicular chain and provides excitation tissue for an actuator. However, many patients are clinically accompanied with auditory ossicle diseases such as auditory ossicle erosion and auditory ossicle malformation. This prevents many patients from using the artificial middle ear described above to compensate for hearing impairment. In order to solve the problem, round window excitation type artificial middle ear is researched at home and abroad in recent years, namely, an actuator is adopted to directly excite a round window membrane of a cochlea to compensate hearing impairment. The excitation position directly avoids the ossicular chain of the patient, and provides a reliable treatment scheme for the patient with the damaged ossicular chain.

During implantation of the round window excitation type artificial middle ear actuator, the part of the tympanic cavity next to the round window membrane is a common position for implantation of the actuator. However, since these implant sites are located in the body and the tympanic space is small, positioning and mounting of the actuator during the surgical implantation procedure is difficult. More specifically, the main position of implanting of round window excitation formula artificial middle ear actuator is round window niche department, is located the lower part of drum indoor wall, compares in the artificial middle ear actuator of other forms, and the position of implanting of round window excitation formula artificial middle ear actuator is comparatively deep, and the implantation environment is comparatively complicated, and the operation is difficult.

The round window excitation type artificial middle ear which is widely used clinically at present is a Vibrating Sound Bridge (VSB) produced by austria MED-EL company, and the outline structure of an actuator (Floating Mass Transducer, FMT) of the round window excitation type artificial middle ear is similar to a cylinder. When the implantation operation of the vibration acoustic bridge is carried out, firstly, the epidermis needs to be cut at the back of an ear, an otology electric drill is used for grinding a channel leading to a drum chamber on a mastoid, then, the ear electric drill is used for grinding redundant bone around the round window niche, an actuator FMT of the vibration acoustic bridge is placed in a narrow space in the round window niche, and the output end of the actuator is coupled with the round window membrane, so that the actuator can excite the round window membrane, and a patient with hearing damage can obtain hearing compensation. Finally, the actuator is fixed by wrapping it around the fascia.

However, in the whole operation process, the pose of the actuator is difficult to accurately adjust, and the coupling degree of the actuator and the round window film cannot be controlled. Clinical reports show that due to uncertainty caused in the operation process, the postoperative effect of the round window excitation type artificial middle ear after implantation has larger difference, and the postoperative hearing compensation effect is not ideal. In particular, the reasons for these problems in the clinic mainly include the following:

firstly, the position and the angle of the actuator can not be accurately adjusted when the actuator is implanted in the operation. The actuator used clinically at present is a tiny cylinder, the diameter of the circular section of the cylinder is 1.8mm, and the height of the cylinder is 2.3 mm. In performing the surgical implantation of the actuator, a conventional facial recess approach is typically used to create a passageway to the posterior tympanic cavity by abrading a portion of the mastoid process behind the ear. And the actual physiological structure shows that the round window membrane is wrapped by the round window niche, the round window niche is an inward recess of the inner side wall of the drum chamber positioned at the rear lower part of the drum promontory, and the bottom of the round window niche is provided with a similar round window which is the round window, so that part of sclerotin of the front edge and the rear edge of the round window niche needs to be ground firstly, and the actuator is placed in a narrow space ground in the round window niche. In the process, in order to reduce the influence of surgical trauma on human bodies as much as possible, the mastoid passage opening milled out in the operation is small, so that the adjustment of the orientation of the actuator by using a conventional surgical instrument becomes extremely difficult, and the posture of the actuator is adjusted by shifting the actuator by using forceps in the operation process. And because the actuator has smaller mass and the surface of the bone in the round window niche is uneven, the actuator is easy to slide and deviate when being stirred by using tweezers, so that the pose of the actuator is extremely difficult to adjust. Research shows that (factory stimulating transfer of the flowing mass transfer. oxygen & neurology, 2009.) when the actuator is perpendicular to the round window membrane, the traditional surgical process has difficulty in accurately adjusting the actuator in the ideal pose and reduces the post-operation hearing compensation performance of the actuator.

Secondly, the coupling degree of the actuator and the round window film can not be controlled in the conventional operation. In the implantation operation process of the actuator, after the actuator is placed to a proper position through the subjective judgment of a doctor, the doctor uses forceps to clamp prepared fascia and places the back end of the actuator to support and fix the actuator, and the actuator and the round window membrane are kept in a coupling contact state. However, the surgeon inserts the end of the actuator behind the fascia during the procedure, the amount of fascia inserted being subjectively controlled by the surgeon, which makes the degree of coupling between the actuator and the round window membrane uncontrollable. When the amount of fascia inserted into the rear end of the actuator is too small, the actuator may not be sufficiently coupled to the round window membrane, and when the amount of fascia inserted into the rear end of the actuator is too large, the initial pressure of the actuator on the round window membrane is inevitably increased. Studies have shown that maintaining a suitable initial pressure between the actuator and the round window membrane is beneficial for enhancing the hearing compensation effect. Furthermore, according to Ishii et al (mechanical properties of human round window, basilar and Reissner's membranes, ActaOtolaryngol,1995.), when the force applied to the round window membrane reaches 564mN, the round window membrane is pierced, and intracochlear lymph flows out along the pierced hole of the round window membrane, resulting in further deterioration of the residual hearing of the patient. Therefore, in the traditional operation process, the coupling degree between the actuator and the round window membrane cannot be controlled, the compensation performance of the round window excitation type artificial middle ear is reduced, and the residual hearing of a patient can be further deteriorated.

Thirdly, the pose of the actuator cannot be fixed when the fascia is used for fixing the actuator, so that the pose of the actuator is deviated. In the operation process, after the actuator is placed to a proper position through the subjective judgment of a doctor, fascia is inserted into the rear end of the actuator to support the actuator, and the fascia is wrapped around the actuator to fix the actuator. However, in this process of using fascia to secure the actuators, the actuators are placed in an unconstrained state at predetermined locations within the round window niche, since there are no special surgical instruments or members to limit the attitude of the actuators. When fascia is used for fixing, the fascia inevitably touches the actuator to force the preset pose of the actuator to shift, so that the actuator is difficult to vertically excite the round window membrane to achieve the optimal hearing compensation effect.

The factors are combined, the implantation complexity of the round window excitation type artificial middle ear actuator and the variability of the hearing compensation effect after implantation are considered, and no special surgical instrument is used for auxiliary installation in the implantation process of the round window excitation type artificial middle ear actuator. Therefore, it is of great significance to develop a surgical instrument for a round window excitation type artificial middle ear actuator.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a surgical instrument for implanting a round window excitation type artificial middle ear actuator, which can adjust the actuator at any angle so that the actuator can be vertically coupled with a round window membrane. And the surgical instrument can adjust the axial position of the actuator, so that the coupling degree of the actuator to the round window membrane is adjusted, and the problem that the coupling degree is not ideal due to the fact that the amount of fascia plugged into the rear end of the actuator is not easy to control is solved. In addition, the surgical instrument can fix the actuators at predetermined positions by a mechanical structure without shifting the postures of the actuators when the actuators are fixed using fascia.

The invention is realized by the following technical scheme: a surgical instrument for implanting a round window excited artificial middle ear actuator, comprising an operating device, a tubular element, a driving rod, a rotatable support and an actuating device;

the operating device comprises a grab handle, a jaw actuator, a locking slide block and a jaw adjusting knob; the locking sliding block is arranged in the grab handle and is connected with the grab handle in a moving pair way; the jaw actuator is fixed inside the grab handle and can rotate around the rotation center of the jaw actuator; one end of the jaw actuator, which is arranged in the grab handle, is matched with the locking sliding block, and the sliding block can be driven to move by tightly holding the jaw actuator; the forceps holder adjusting knob is a rotatable component arranged on the outer side surface of the grab handle;

the tubular element is an elongated hollow pipe fitting, and the rear end of the tubular element is in threaded connection with the operating device; the rotatable support and the executing device are respectively screwed on the outer side and the inner side of the front end of the tubular element;

the driving rod is arranged in the tubular element and is in contact with the tubular element in a moving pair, the driving rod extends out of two ends of the tubular element, the rear end of the driving rod is fixed in the operating device, and the front end of the driving rod is hinged with the executing device;

the rotatable bracket can adjust the axial position of the rotatable bracket on the tubular element, and the rotatable bracket can simultaneously adjust the supporting angle of the rotatable bracket at any angle;

the actuator is clamped by the executing device, and the axial displacement of the actuator is adjusted through the matching of the operating device and the driving rod; the executing device is connected with the jaw adjusting knob through a steel wire rope, the steel wire rope is restrained on the outer side of the tubular element, and the opening and closing of the executing device can be adjusted by rotating the jaw adjusting knob.

Preferably, the grab handle is a hollow shell with size and shape suitable for being held by hands, and a guide rail and a fixed shaft are arranged in the grab handle; the middle position of the locking sliding block is a cylinder, square bodies with the same thickness are arranged at two ends of the cylinder respectively, the square bodies are matched with the guide rail and are in contact with the moving pair, the circumferential rotation of the locking sliding block can be limited, and the locking sliding block slides along the guide rail; the locking mechanism is characterized in that a circular through hole matched with the driving rod is formed in the center of the locking sliding block, a locking screw is arranged on one side of the locking sliding block, the rear end of the driving rod penetrates through the circular through hole in the center of the locking sliding block, the locking screw is adjusted through a screw adjusting hole to fix the driving rod, and the locking screw cannot influence the movement of the locking sliding block.

Preferably, the upper part of the forceps holder actuator is vertically provided with square through holes respectively, the square through holes are matched with the driving rod and the locking slide block respectively, the forceps holder actuator is connected with the fixed shaft on the handle through a rotating pair, the forceps holder actuator is provided with an elastic body, the elastic body can enable the forceps holder actuator to be kept at a fixed position, the locking slide block can be driven to slide along the guide rail when the forceps holder actuator is gripped, and after the gripping force of the forceps holder actuator is cancelled, the elastic body provides restoring force for the forceps holder actuator, so that the forceps holder actuator and the locking slide block can restore to the original positions; the square through hole does not interfere with the movement of the locking slide and the drive rod relative to the counter-jaw actuator.

Preferably, the outer side of the tubular element is provided with a plurality of positioning rings for passing and restraining the position of the steel wire rope, the rear end of the tubular element is provided with internal threads, and the front end of the tubular element is respectively provided with internal threads and external threads.

Preferably, the rotatable support comprises a special bearing, a support and a locking nut, wherein an inner thread matched with an outer thread at the front end of the tubular element is arranged on the inner side of the special bearing inner ring, a support rod is arranged on one side of the characteristic bearing outer ring, a thread is arranged at the outer end of the support rod, the support is connected with the support rod in a rotating pair mode, and the locking nut is in threaded connection with the support rod, so that the axial displacement of the support is limited.

Preferably, the actuating device includes base, forceps holder subassembly, ratchet, pawl, the base is hollow cylinder type structure, and the rear end is equipped with the external screw thread with tubulose component front end internal thread matched with, the base front end is the symmetric position and is equipped with a pair of bow-shaped cantilever, bow-shaped cantilever top is equipped with an annular through hole, the annular through hole is the opposite side circular through hole for the plane, the actuating lever stretches out and articulates with the pawl in the base, the pawl cooperatees with the ratchet.

Preferably, a through hole with internal threads is formed in the center of the ratchet wheel, the diameter of the internal threads is equal to that of the annular through hole, the ratchet wheel is arranged in the middle of the arched cantilever and is arranged on the same axis with the annular through hole, and the thickness of the ratchet wheel is equal to the spacing distance of the arched cantilever.

Preferably, the jaw assembly comprises a jaw main body, a side jaw, a pressing piece and a threaded rod, the threaded rod is arranged on the side face of the upper portion of the jaw main body, the cross section of the threaded rod is matched with the annular through hole, the threaded rod penetrates through the annular through hole and is connected with the ratchet wheel through a thread pair, the annular through hole can limit circumferential rotation of the threaded rod, the side jaw is hinged with the thread main body, one end of the pressing piece is fixedly connected with the jaw main body, the other end of the pressing piece presses the side jaw to provide clamping force for the side jaw, and a clamping ring used for fixing the steel wire rope is arranged on.

Preferably, the actuating device comprises a base, a connecting rod and a clamp assembly, wherein the base is of a hollow cylindrical structure, the rear end of the base is provided with an external thread matched with the internal thread at the front end of the tubular element, the rear side of the front end of the base is provided with a supporting plate, the top end of the supporting plate is provided with a cylindrical guide rod, and the driving rod extends out of the base and is hinged to one end of the connecting rod.

Preferably, the jaw assembly comprises a jaw main body, a side jaw and a pressing piece, a circular through hole matched with the guide rod is formed in the middle upper portion of the jaw main body, the jaw main body is in contact with the guide rod through a moving pair, the upper portion of the jaw main body is hinged to the other end of the connecting rod, the side jaw is hinged to the jaw main body, one end of the pressing piece is fixedly connected with the jaw main body, the other end of the pressing piece presses the side jaw to provide clamping force for the side jaw, and a clamping ring used for fixing a steel wire rope is arranged on the pressing piece.

Compared with the prior art, the invention has the following beneficial effects: the invention provides a surgical instrument for implanting a round window excitation type artificial middle ear actuator, which comprises an elongated tubular element, an actuating device at the front end of which can clamp the actuator to penetrate into a round window niche through a narrow mastoid passage. The front end of the tubular element is provided with a rotatable bracket which can abut against the bone near the round window niche to prevent the surgical instrument from shaking in the operation process. At the same time, the rotatable support is adjustable in its position outside the body on the tubular element, so that the actuator is in the same axial position as the round window membrane at the round window niche. In addition, the rotatable support can adjust the pose of the actuator at any angle in the ear, so that the actuator is in a vertical state and is coupled with the round window film, and the problem that the pose of the actuator is not easy to adjust in the existing operation process is solved.

The invention provides a surgical instrument for implanting a round window excitation type artificial middle ear actuator, which comprises a clamping assembly for clamping the actuator, wherein an operating device can adjust the clamping assembly of an executing device in vitro, namely, the axial position of the actuator can be adjusted in vitro through the operating device, so that the actuator is in contact coupling with a round window membrane and proper initial pressure is maintained. This kind of mode through mechanical structure regulation actuator and round window membrane coupling degree, its coupling degree is by mechanical structure direct control, can avoid effectively causing the actuator to the too big round window membrane damage or the initial pressure of leading to the fact the insufficient problem of coupling of initial pressure to the round window membrane because of the difficult control of the fascia volume of stuffing in the actuator rear end.

The invention provides a surgical instrument for implanting a round window excitation type artificial middle ear actuator, wherein a front end jaw assembly is provided with a side jaw, and the side jaw is provided with firm clamping force by a pressing sheet, so that the jaw assembly can reliably clamp the actuator. Therefore, after the surgical instrument adjusts the position of the actuator relative to the round window membrane, the actuator can be fixed at the preset position without deviation, namely, the actuator is not forced to deviate from the preset position when the rear end and the periphery of the actuator are covered with fascia. This can effectively avoid the problem that the actuator deviates from the preset position during the process of using fascia to fix the actuator, so that the hearing compensation effect is not ideal.

The invention provides a surgical instrument for implanting a round window excitation type artificial middle ear actuator, and an executing device for clamping the actuator adopts a translation mechanism. In the actual human anatomy, the round window membrane is an extremely fragile thin-film structure. Therefore, in the process of implanting the actuator, if a problem such as relative rotation or displacement occurs between the actuator phase and the round window film, the round window film may be damaged. Therefore, the surgical instrument provided by the invention pushes the actuator to establish coupling contact with the round window film in a translation mode, so that the actuator can be effectively prevented from damaging the round window film in the adjusting process.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of an external appearance according to a first embodiment of the present invention;

FIG. 3 is a schematic view of a side grip and a steel cable removed according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a clamp actuator according to the first embodiment of FIG. 2;

FIG. 5 is a schematic diagram of the first embodiment of FIG. 2 including a wireline, a tubular member, a rotatable support, and an actuator;

FIG. 6 is an exploded view of the rotatable mount of the first embodiment of FIG. 2;

FIG. 7 is an exploded view of the actuator of the first embodiment of FIG. 2;

FIG. 8 is a schematic view of the second embodiment of the present invention with one side of the handle and the wire rope removed;

FIG. 9 is an exploded view of the actuator in the second embodiment of FIG. 7;

fig. 10 is a diagrammatic illustration of the surgical instrument of the first embodiment of fig. 2 in operation with actuator implantation, wherein the lighter gray areas represent the bone wall adjacent the round window membrane.

The specific implementation mode is as follows:

in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.

Referring to fig. 1, a surgical instrument for implanting a round window excitation type artificial middle ear actuator comprises a manipulating device 100, a tubular element 90, a driving rod 80, a rotatable bracket 200 and an actuating device 300.