Artificial anal sphincter prosthesis based on elastic contraction and release

Abstract

An artificial anal sphincter prosthesis based on elastic contraction and release belongs to the technical field of medical instruments and comprises an elastic mechanism which is annularly arranged and a retractable mechanism, wherein the elastic mechanism penetrates through the retractable mechanism; the telescopic end of the retractable mechanism is connected with the tail end of the elastic mechanism; the elastic mechanism is linked through the retraction of the telescopic end so as to realize change of the inner diameter of the ring. The artificial anal sphincter prosthesis successfully solves the problem that a water sac type structure prosthesis performs mutual leakage with human body interstitial fluid in a human body; a pressure sensor arranged in the prosthesis senses the change of intestinal pressure, when a user needs to defecate, the prosthesis is automatically opened through a driving device, the prosthesis is opened to the appropriate extent through pressure sensing, and the user starts to defecate; when defecation is completed, and bowel control is needed, the prosthesis is automatically closed, and through the sensing pressure and closed-loop control, the prosthesis is closed to the appropriate extent, so that bowel control is realized. The artificial anal sphincter prosthesis is easy to miniaturize and light in weight, facilitates prosthesis implantation, and can efficiently improve the success rate of prosthesis implantation; the novel mechanical artificial anal sphincter prosthesis based on elastic contraction and release is arc-shaped and simple in structure, and facilitates clinical realization.

Description

technical field [0001] The invention relates to a device in the technical field of medical devices, in particular to an artificial anal sphincter prosthesis based on elastic scaling. Background technique [0002] Fecal incontinence is a clinically common disease. According to statistics, the incidence rate of adults is as high as 2%, and the incidence rate of people over 65 years old can reach 7%. underestimated. Fecal incontinence refers to the loss of the anal sphincter's ability to control the excretion of feces and gas. It is easy to cause a variety of complications, which not only brings great pain to patients, but also brings many difficulties to nursing work. With the aging trend of the population With the development, fecal incontinence has become one of the clinical diseases that urgently need to be solved. [0003] Severe fecal incontinence is caused by the loss of function of the anal sphincter or the removal of the anal sphincter. The surgical treatment of this...

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Problems solved by technology

[0004] Found through literature search to prior art: U.S. Patent No.: US7,022,622B2, discloses a kind of Artificial Anal Sphincter (for the treatment of fecal incontinence artificial anal sphincter), this technology is by Pressure Regulating Ballon (pressure regulating ball) , Control Pump (control pump) and Cuff (clamp pouch) are composed of three parts. The control pump is the key component of this artificial anal sphincter. Its working principle is to manually squeeze to work, which makes this artificial anal sphincter The disadvantages are: 1. The pressure regulation of the liquid capsule is easy to penetrate with the interstitial fluid in the human body, which leads to the gradual increase of the liquid capsule. There was a patient in the United States who was caused by the increase of the pressure regulating ball fluid storage bag. The ABS is forced to be transplanted out of the body; 2. The patient must manually squeeze the control pump to drain the liquid in the clamp pouch to the fluid storage pouch, and the control pump is implanted into the scrotum (male) or labia (female). It has an impact on the life of the patient, and due to the complexity of the system, the implantation success rate is only 53%;

[0005] Chinese patent CN102871773A, on the publication date, discloses an "electromagnetically controlled artificial anal sphincter device based on rectal sensing function". The actuator pair passes through the transmission mechanism, so that the arc-shaped closing mechanism tightens and clamps the intestinal tract. However, the disadvantages of this mechanism are: 1. The shape of the actuator is triangular, which is not an ideal shape for an implantable prosthesis. The sharp corners are easy to cause damage to other tissues and organs in the body; 2. When the circular arc actuator is closed, due to the existence of the two circular arc shape mechanisms, there must be a small circular space in the clamping state, which may not be able to completely clamp Living in the intestinal tract, whether it can effectively control the bowel movement remains to be verified

[0006] In summary, although the artificial anal sphincter system is an effective solution for the treatment of severe fecal incontinence, the water bladder prosthesis structure cannot effectively solve the problem of interstitial fluid penetration in the human body; the electromagnetically controlled artificial anal sphincter with rectal sensing function The design of the device is ingenious, but in terms of structural shape and structural design, it is difficult to apply it clinically

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