CN103690157A - Uniformly-transmitting pressure sensor used for artificial anal sphincter system - Google Patents
Uniformly-transmitting pressure sensor used for artificial anal sphincter system Download PDFInfo
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Abstract
A uniformly-transmitting pressure sensor used for an artificial anal sphincter system and in the technical field of medical instruments comprises a closed cavity formed by a hemispheric wrapping layer and a fixing plate, a sensor bare chip arranged inside the closed cavity, and a liquid or gaseous medium used for uniformly transmitting pressure. The sensor bare chip is fixedly arranged on the inner side of the fixing plate, a signal leading-out welding pad is arranged on the outer side of the fixing plate correspondingly, and a micro circuit board is arranged on the fixing plate and comprises a bridge-type compensation circuit which is connected with the sensor bare chip. The uniformly-transmitting pressure sensor is mainly applied to elastic scaling-type artificial anal sphincter prostheses, finger-lock-type artificial anal sphincter prostheses and the like and is suitable for implanted systems which need to contact with intestinal walls to collect pressure, uniform transmitting of pressure value is realized, measuring effect of the pressure sensor is improved, and effective measuring of biotic pressure signals in-vivo intestinal tracts in complex intestinal tract environment is realized.
Description
Technical field
What the present invention relates to is a kind of device of intestines and stomach technical field of medical instruments, specifically, for an even delivery type pressure transducer for artificial anal sphincter system, this sensor is entrenched in artificial anal sphincter prosthese for measuring the organism pressure value to the interlock pressure of intestinal and intestinal.
Background technology
Disorder of gastrointestinal tract is common clinical disease, and according to statistics adult's fecal incontinence sickness rate, up to 2%, over-65s person sickness rate can reach 7%.Aspect treatment intestinal tract disease, there is the medical device of many implanteds both at home and abroad, as artificial anal sphincter, GI irritation device etc., these implant devices can provide safer therapeutic scheme easily to patient, have a good application prospect.Many implant devices need to gather gastrointestinal pressure signal, to realize corresponding function, but how effectively to gather colonic pressure, are that educational circles is in a difficult problem for research always.
Through the literature search of prior art is found: China Patent No.: CN103393480A, open day 2013-11-20, a kind of elasticity pantographic artificial anal sphincter prosthese is disclosed, it realizes the open and close controlling of prosthese by gathering colonic pressure, but its not depicted in greater detail how to gather colonic pressure, it does not relate to the making of the pressure transducer that gathers colonic pressure.
Chinese patent literature number: CN201514275U, open day 2010-06-23, a kind of high-sensitivity contact-type vibration monitoring piezoelectric sensor is disclosed, comprise a contact shaking head, a piezoelectric membrane sensing element, a signal leading-out piece and a fixture, described contact shaking head and piezoelectric membrane sensing element closely connect into an assembly, the periphery of described assembly is fixed by described fixture, and described piezoelectric membrane sensing element is electrically connected to described signal leading-out piece.During use, the head of contact shaking head contacts with testee, the vibration of testee passes to piezoelectric membrane sensing element by contact shaking head, thereby realize the on-line monitoring to object vibration, but this technology does not possess the requirement of implanted equipment, can not implant into body detect the force value of intestinal.
Chinese patent literature CN103284710A, open day 2013-09-11, a kind of implanted lung vascular pressure sensor is disclosed, comprise super olive shape support, pressure transducer, pintle, the pressure reader that plays B alloy wire composition of titanium nickel, after design is implanted, be held on testee, by the real-time detected pressures data of external reader.Possesses the requirement of implanted, the design concept that remote control is transmitted is worth praising highly, but its design is comparatively coarse, its pressure transducer does not possess the ability of even transmission of pressure, the force value of measuring may be lost in accurately, and the mode of its remote-control pressure value transmission is not specifically described, it is more a kind of theory method.
In sum, the pressure sensor application prospect of implanted is extensive, but the existing sensor overwhelming majority does not meet implantation requirement, possesses the theory that the rests on stage of implanting more multi-layered of required pressure sensor, and the function that does not possess even transmission of pressure, measurement data accuracy is still to be tested.
Summary of the invention
The present invention is directed to prior art above shortcomings, a kind of even delivery type pressure transducer for artificial anal sphincter system is proposed, this sensor is mainly used in artificial anal sphincter system, as elasticity pantographic artificial anal sphincter prosthese, refer to button artificial anal sphincter prosthese etc., be adapted to contact the embedded system that intestinal wall gathers pressure, on the basis at microminiature pressure transducer nude film, design sealed envelope layer, in its sealed envelope layer, inject liquid silicon gel, realize even transmission of pressure value, improve the measurement effect of pressure transducer, realize the organism pressure signal of effectively measuring intestinal in body under intestinal complex environment.
The present invention is achieved by the following technical solutions, the present invention includes: the airtight cavity consisting of hemispherical integument and fixing head and the medium that is arranged at airtight cavity inside and sensor die.
Described sensor die is fixedly installed on the inner side of fixing head, and the outside of corresponding fixing head is provided with signal and draws pad;
Described fixing head is provided with micro-circuit board, and it comprises bridge-type compensating circuit, and this compensating circuit is connected with described sensor die.
Described fixing head is provided with pin hole injection port, for injecting aqueous silica gel.
Described fixing head is made by medical titanium alloy, has good biocompatibility and histocompatibility.
Described integument is the membrane structure of thickness <0.5mm, for wrapping up aqueous silicon gel, by medical silica-gel, is made, and has good draftability and is applicable to transmission of pressure, has good biological safety and histocompatibility.
Under described aqueous silicon gel room temperature, being liquid, selecting Medical silicone gels material to make, is good pressure transmission medium, guarantees that the pressure that wrap film is subject to is evenly passed to sensor die.
Accompanying drawing explanation
Fig. 1 is generalized section of the present invention;
Fig. 2 is schematic perspective view of the present invention;
In figure: wrap film 1, sensor die 2, retainer ring 3, fixed disc 4, injection orifice 5, liquid medium 6.
the specific embodiment
Below embodiments of the invention are elaborated, the present embodiment is implemented take technical solution of the present invention under prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, the present embodiment comprises: wrap film 1, sensor die 2, retainer ring 3, fixed disc 4, injection orifice 5, liquid medium 6, wherein: sensor die 2 is fixed on fixing head 4, wrap film 1 merges with fixing head 4 outer walls, retainer ring 3 is for clamping thin film 1 end, be convenient to thin film expansion stressed, medium 6 is realized filling by the mode of injecting.
The pressure transducer of the present embodiment is contact pressure sensor, and specification is 2.2mm*2.7mm, and range is 1～10bar, and contact surface can be soaked for a long time.
The sensor fixation plate of the present embodiment, comprises sensor compensation treatment circuit, and specifications control is in φ 4mm, and fixing head is provided with injection orifice 5, for injecting liquid medium, after having injected, with expanding stopper, clogs.
The wrap film thickness of the present embodiment is 0.5, adopts special silica gel to make, and has good draftability and biological safety.
Medium in the present embodiment adopts fruit jelly shape gel, and even transmission of pressure is also not easy to seepage.
Retainer ring in the present embodiment mates with fixing head outside dimension, mates thin film clamping with fixing head, stressed while being convenient to thin film expansion.
In the present embodiment, the stationary plane specification of sensor is φ 5mm, and the distance of stationary plane and thin film top is 3mm, and sensor thickness is 3mm.Volume is small, is convenient to realize embedding sphincter prothesis and measures intestinal organism pressure.
In the present embodiment, sensor is after processing, and the pressure of output voltage signal and contact surface is linear.
The present invention is used for measuring related pressure, be mainly used in and in artificial anal sphincter system, measure intestinal and press, as embed elasticity pantographic artificial anal sphincter prosthese, refer to button artificial anal sphincter prosthese etc., can be used for gathering prosthese when prosthese opens and closes the interlock of intestinal is pressed, for the switching of prosthese provides closed loop control parameter; After implanting for prosthese, gather because intestinal contents increases the colonic pressure causing and change the pressure pulse producing with intestinal peristalsis promoting, for awareness of defecation, rebuild biological parameter is provided.
Claims (6)
1. the even delivery type pressure transducer for artificial anal sphincter system, it is characterized in that, comprising: the airtight cavity being formed by hemispherical integument and fixing head and the sensor die that is arranged at airtight cavity inside and for evenly liquid state or the gaseous medium of transmission of pressure;
Described sensor die is fixedly installed on the inner side of fixing head, and the outside of corresponding fixing head is provided with signal and draws pad;
Described fixing head is provided with micro-circuit board, and it comprises bridge-type compensating circuit, and this compensating circuit is connected with described sensor die.
2. sensor according to claim 1, is characterized in that, described fixing head is provided with pin hole injection port, for injecting aqueous silica gel.
3. sensor according to claim 1 and 2, is characterized in that, described fixing head is made by medical titanium alloy.
4. sensor according to claim 1, is characterized in that, described integument is the membrane structure of thickness <0.5mm, for wrapping up aqueous silicon gel; This integument is made by medical silica-gel.
5. sensor according to claim 1, is characterized in that, is liquid under described aqueous silicon gel room temperature, and this aqueous silicon gel is made by Medical silicone gels material.
6. sensor according to claim 1, is characterized in that, described signal refers to: the pressure pulse that the intestinal that the interlock pressure of intestinal, intestinal are caused because content increases is intrinsic pressure, intestinal peristalsis promoting signal produces of sphincter prothesis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310746716.1A CN103690157A (en) | 2013-12-30 | 2013-12-30 | Uniformly-transmitting pressure sensor used for artificial anal sphincter system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310746716.1A CN103690157A (en) | 2013-12-30 | 2013-12-30 | Uniformly-transmitting pressure sensor used for artificial anal sphincter system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104665851A (en) * | 2015-01-06 | 2015-06-03 | 上海交通大学 | Miniature pressure sensor and packaging method thereof |
| CN104720931A (en) * | 2015-03-30 | 2015-06-24 | 上海交通大学 | Puborectalis-imitated dual-ring artificial anal sphincter prosthesis |
| CN105030194A (en) * | 2015-04-22 | 2015-11-11 | 上海交通大学 | System and method for detecting content in intestinal tract based on flexible pressure transducers and infrared detection |
| CN107049557A (en) * | 2017-06-01 | 2017-08-18 | 上海交通大学 | Totally enclosed type anal sphincter prosthese |
| CN109674559A (en) * | 2017-10-18 | 2019-04-26 | 上海交通大学 | Imitative pubis artificial anal sphincter prosthese |
| CN110720936A (en) * | 2019-09-09 | 2020-01-24 | 浙江省北大信息技术高等研究院 | Implanted pressure sensor and method for measuring internal pressure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104665851A (en) * | 2015-01-06 | 2015-06-03 | 上海交通大学 | Miniature pressure sensor and packaging method thereof |
| CN104720931A (en) * | 2015-03-30 | 2015-06-24 | 上海交通大学 | Puborectalis-imitated dual-ring artificial anal sphincter prosthesis |
| CN105030194A (en) * | 2015-04-22 | 2015-11-11 | 上海交通大学 | System and method for detecting content in intestinal tract based on flexible pressure transducers and infrared detection |
| CN105030194B (en) * | 2015-04-22 | 2018-01-02 | 上海交通大学 | Intestinal contents detecting system and method based on pliable pressure sensor and infrared acquisition |
| CN107049557A (en) * | 2017-06-01 | 2017-08-18 | 上海交通大学 | Totally enclosed type anal sphincter prosthese |
| CN109674559A (en) * | 2017-10-18 | 2019-04-26 | 上海交通大学 | Imitative pubis artificial anal sphincter prosthese |
| CN110720936A (en) * | 2019-09-09 | 2020-01-24 | 浙江省北大信息技术高等研究院 | Implanted pressure sensor and method for measuring internal pressure |
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Application publication date: 20140402 |