The present invention relates to a technology in the field of medical devices, in particular to an in-situ implanted bionic artificial anal sphincter system with an independent swing arm structure.
Artificial anal sphincter prosthesis simulates the physiological function of normal anal sphincter by sensing rectal pressure through pressure sensor, and remodels rectal sensory in combination with control system to realize autonomous control of defecation, thus treating fecal incontinence. The complexity of the existing fully closed anal sphincter prosthesis and the large number of parts lead to the large weight of the sphincter, which will lead to biocompatibility and safety problems after implantation; the difficulty in adjusting the installation position of Hall switch commonly used in the system makes it difficult to guarantee the normal working range of middle ring, which affects the normal opening or closing of the intestinal tract by the sphincter system; in addition, these prosthetic mechanisms generally have more middle rings and accessory components, and the assembly difficulty leads to the reduction of assembly accuracy, which affects the transmission effect, and then results in the energy consumption imbalance of sphincter system, affecting the normal operation of the system; the movable seal of the middle ring is difficult to guarantee, which may cause safety problems.
In view of the above shortcomings existing in the existing technology, an in-situ implanted bionic artificial anal sphincter system with an independent swing arm structure is proposed in the present invention. A planetary gear reducer is used in the present invention, which has a simpler and smaller structure and reduces the risk of surgical transplantation; the simple middle ring structure with independent rotating shaft reduces the installation difficulty; Hall switch is arranged within the upper ring compartment to facilitate wiring; the external gear meshing transmission torque is simple and reliable.
The present invention is realized by the following technical scheme:
The present invention comprises: an energy transmission control unit and a sphincter prosthesis unit. The energy transmission control unit comprises a master control module and a percutaneous wireless energy transmission module while the sphincter prosthesis unit comprises a wireless energy receiving module, a micro power supply, a sensor, an execution unit and a slave control module, wherein: master control module that is connected with the slave control module through wireless communication transmits the control command signal to the internal slave control module. The percutaneous wireless energy transmission module is connected with the wireless energy receiving module through electromagnetic coupling, of which the internal receiving module that is connected with the micro power supply transfers the external energy to the micro power supply for charging. The sensor and the actuator that are connected with the slave control module transmits the information on intestinal pressure, temperature and the position of the actuator, and the internal information is transmitted by the slave control module to the external control module.
The execution unit comprises the upper and lower ring mechanisms which are fixedly connected and opposite arranged, and the middle ring mechanism which is rotationally arranged between the upper ring mechanism and the lower ring mechanism, wherein: the fixed connection is realized by the driving mechanism which is connected with the upper ring mechanism and the lower ring mechanism respectively at each ends, and the middle ring mechanism can rotate through an independent rotating shaft connected between the upper and lower ring mechanisms. At least one end of the rotating shaft is meshed with the driving mechanism, and the output torque of the driving mechanism drives the swing arm movement of the middle ring mechanism through the rotating shaft.
The driving mechanism comprises a motor with a reduction box arranged inside the motor sleeve, wherein the output shaft of the reduction box is connected with at least one end of the rotating shaft through gear engagement.
The middle ring mechanism is fixedly connected with the rotating shaft, and a magnet is arranged in the magnet support which rotates synchronously with the rotating shaft, and a Hall element is arranged on the gear diaphragm in the corresponding upper ring mechanism bin. When the magnet rotates to the set position with the hall element, a limit signal is triggered to control the driving mechanism to stop working; when the driving mechanism reverses to drive the middle ring mechanism to rotate in the opposite direction, the position sensing of the hall element is also used to realize the limit. Furthermore, the exact position of the middle ring mechanism can be further determined by providing two hall elements.
Compared with the existing technology, the technical effects of the invention include:
1) Simple mechanism, less number of parts, reduced the weight of the mechanism, strong compatibility and safety after implantation;
2) The hall element is arranged in the upper ring mechanism and is sealed by the sealing ring and the installation position of the Hall switch is easy to be adjusted to ensure the normal operation of the Hall switch, thus ensuring the normal opening or closing of the intestinal tract by the sphincter system.
3) The magnet matched with the hall element is arranged in the magnet support that rotates synchronously with the rotation axis, and the position can be adjusted according to the opening angle required by the swinging middle ring;
4) The overall size of the mechanism is reduced by using planetary gear reducer, and the motor sleeve can both fix the motor gear reducer and facilitate wiring.
5) Greatly shortened assembly time due to the fixed connection of middle ring mechanism with the rotating shaft and modular installation of the associated part the actuator, and the final integration into the upper and lower ring mechanism.
6) Movable sealing is guaranteed by adopting sealing ring for the middle ring mechanism.
Where: 1 upper ring cover plate, 2 upper fixed ring, 3 gear cover plate, 4 gear diaphragm, 5 transmission gear train, 6 magnet support, 7 upper bearing sleeve cover plate, 8 upper bearing sleeve, 9 upper ring support, 10 reducer, 11 motor sleeve, 12 motor, 13 rotating shaft, 14 middle ring mechanism, 15 middle ring cover plate, 16 lower ring support, 17 lower bearing sleeve, 18 lower bearing sleeve cover plate, 19 lower fixed ring, 20 control communication module, 21 lower ring cover plate.
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One side of the gear diaphragm 4 is provided with the position bin 23 for installing the Hall element. After the installation of the hall element, the hall element switch is formed by cooperating with the magnet at the position hole 22 to limit the middle ring mechanism: when the middle ring mechanism rotates, the magnets in the magnet position hole 6 will rotate together; when the magnet rotates to the position overlapped with the hall element, the hall element will generate a limit signal to prevent the driving mechanism from continuing to rotate, thus realizing the limit of the middle ring mechanism limit. Wherein, the design position of the magnet mounting position hole 6 and Hall element bin 23 is more open, which is convenient for adjusting and positioning.
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The Mode of Carrying out the Invention above may be partially adjusted in different ways by a person skilled in the art on the premise of not deviating from the principle and purpose of the invention. The protection scope of the invention is subject to the claim and is not limited by the Mode of Carrying out the Invention above. Each Carrying out scheme within the scope of the invention is subject to the restriction of the invention.
Number | Date | Country | Kind |
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201711264462.4 | Dec 2017 | CN | national |
Filing Document | Filing Date | Country | Kind |
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PCT/CN2017/117895 | 12/22/2017 | WO | 00 |