A kind of embedded device of prostate bracketTechnical field
The present invention relates to urological department the field of medical instrument technology, and in particular to a kind of embedded device of prostate bracket.
Background technique
Hyperplasia of prostate is elderly men common disease, is a kind of progressive disease, can cause ankylurethria, and urine is unsmooth,It even entirely shuts, as aging of population develops, disease incidence is risen year by year, domestic relevant information statistics, 50 years old or more maleMiddle about 35~50% people has different degrees of hyperplasia of prostate.Mainly use per urethra prostate electric to hyperplasia of prostate at presentArt is cut, because of its body surface hurtless measure, restores very fast feature, is 60~90% in developed country's treatment hyperplasia of prostate ratio,It is most important treatment means, however this method still belongs to invasive surgery, highly by the proficiency of operative doctor and patientPhysical qualification influence, and this method learning curve is long, expensive.
Urethra rack (or prostate bracket) implantation has obtained biggish development in China in recent years.At present clinicallyCommon method is the placement urethra rack at ankylurethria, will be strutted at ankylurethria or obstruction.This bracket is by stainlessMade of steel, synthetic fibers silica gel or Nitinol, it can be put into ankylurethria position by cystoscope, make original narrow closurePosterior urethral expansion get up, most of dysuric patients can be made to restore urinary function after placing urethra rack.
Nitinol is a kind of marmem, is that can automatically restore at a certain temperature the plastic deformation of itselfThe special alloy of original-shape, corrosion resistance can satisfy all kinds of engineerings and medicine better than medical stainless steel best at presentApplication demand, be a kind of very outstanding functional material.
The urethra rack of Ultimum Ti can be wound in spring by Ultimum Ti silk as emerging alternative medicineShape, wherein one or both ends are processed into slightly thicker than rack body, such as are designed to bell mouth shape, are used for auxiliary positioning.NiTi noteThe urethra rack for recalling alloy has the function of temperature memory, can be in low temperature (generally 0~10 DEG C) deformation retract, at a certain temperatureIt can restore shape again.It can be made to be contracted on delivery sheath with coolant cooling on bracket when use, then be delivered to from urethraLesion.Injection hot water makes its expansion after being delivered to lesion, so that dilating urethra keeps urinary tract unobstructed, furthermore can also terminate in the course for the treatment ofWhen selection take out or stay in the body and be chronically implanted, realize that hurtless measure, no pain, surgical procedure are more easily treated.
The group Chengdu of Ultimum Ti prostate bracket is that memory alloy stent is mounted on delivery system currently on the marketOn system, transportation system is then to cover to use on endoscope, its advantage is that existing endoscopic system is utilized, facilitates mating, lacksPoint be when cover used on rigid endoscope when, hard mirror itself is just bigger to the damage of tissue, and matches with soft endoscopeWhen set, one carrys out the rigidity that sheath of transportation system itself increases endoscope, increases the risk of injury tissue, and twoGeneral diameter of soft lens itself is with regard to larger, and the exocuticle of soft lens is relatively soft material, this causes between soft lens and sheathCoefficient of friction can be very big, it is necessary to coating lubricating oil such as silicone oil could cover transportation system on soft lens, and once have holidayPosition, it is easy to cause it is stuck between transportation system and soft lens, to bring great trouble to the dismounting of transportation system, evenThere is the event of damage endoscope.
Summary of the invention
The purpose of the present invention is overcoming the deficiencies of existing technologies, a kind of prostate bracket that will not be stuck with endoscope is providedEmbedded device.
To achieve the goals above, the present invention provides a kind of embedded device of prostate bracket, the prostate bracketIt is made with the embedded device of shape memory alloy material, the embedded device includes first support seat；DescribedEmbedded device conveys the prostate bracket using endoscope；When the conveying prostate bracket, described theOne carrier base and the prostate bracket are sheathed on side by side on the endoscope, and the proximal end of the prostate bracketIt is resisted against the distal end of the first support seat；The prostate bracket, being capable of band tightener when temperature is lower than its transformation temperatureDue on the endoscope, when temperature is higher than its transformation temperature, it can expand and be loosened from the endoscope；DescribedFirst support seat when temperature is higher than its transformation temperature, can band tightener on the endoscope, be lower than its phase transformation in temperatureWhen point, it can expand and be loosened from the endoscope.
Preferably, the transformation temperature of the prostate bracket is 37~60 DEG C.
Preferably, the transformation temperature of the first support seat is 10~20 DEG C.
Preferably, the first support seat is the braiding structure of tubulose or the engraved structure of laser engraving.
Preferably, the embedded device also includes: the second support seat made of shape memory alloy material；DescribedSecond support seat when temperature is higher than its transformation temperature, can band tightener on the endoscope, be lower than its phase transformation in temperatureWhen point, it can expand and be loosened from the endoscope；When prostate bracket described in conveying, the second support seat hoopIt is tightly fixed on the endoscope, the proximal end of the second support seat is resisted against the distal end of the prostate bracket.
Preferably, the transformation temperature of the second support seat is 10~20 DEG C.
Preferably, the second support seat is the braiding structure of tubulose or the engraved structure of laser engraving.
Preferably, the material of the first support seat and the second support seat selects Nitinol.
Preferably, the prostate bracket spiral winding is at spring-like structures.
Preferably, the one or both ends of prostate bracket structure in the shape of a trumpet.
Compared with prior art, the present invention having the following beneficial effects:
(1) the embedded device structure design of prostate bracket of the invention is simple；
(2) embedded device of the invention conveys prostate bracket using endoscope, will not increase considerably the curved of endoscopeStiffness；
(3) there is no the long sheaths being possible to and endoscope is completely stuck by the present invention, therefore can greatly facilitate operationProcess reduces the risk of injury tissue.
Detailed description of the invention
Fig. 1 is the schematic diagram of the use state of the embedded device of the first embodiment of the invention.
Fig. 2 is the schematic diagram of the phase transition process of first support seat.
Fig. 3 is the schematic diagram of the use state of the embedded device of second of embodiment of the invention.
Specific embodiment
Below in conjunction with drawings and examples, the following further describes the technical solution of the present invention.
In the present invention, when using endoscope, one end far from operator is " distal end ", is " close by one end of proximal operatorEnd ", but direction is not used to limit the invention.
Prostate bracket is delivered to urethra using endoscope by embedded device of the invention.Prostate bracket is by shape memoryAlloy material is made, and may be designed as spring-like structures.
As shown in Figure 1, prostate bracket 1 is bound round on endoscope 2 when conveying.The first embodiment of the invention is setEntering device includes: the first support seat 3 made of shape memory alloy material, and first support seat 3 is tubulose.Utilize endoscope 2When being fed forward the prostate bracket 1, the first support seat 3 and the prostate bracket 1 are sheathed on institute side by sideOn the endoscope 2 stated, and the proximal end of the prostate bracket 1 is resisted against the distal end of the first support seat 3.DescribedProstate bracket 1 when temperature is lower than its transformation temperature, can band tightener on the endoscope 2, be higher than its phase in temperatureWhen height, it can expand and be loosened from the endoscope 2.The first support seat 3 is then on the contrary, be higher than its phase in temperatureWhen height, can band tightener on the endoscope 2, when temperature is lower than its transformation temperature, can expand and from describedIt is loosened on endoscope 2.
The proximal end of the prostate bracket 1 is resisted against the distal end of the first support seat 3, during transportation, reallyProtecting the prostate bracket 1 being coated on the outside of endoscope 2 will not shift.
Prostate bracket 1 and embedded device are inserted into urethra using endoscope 2, the position of lesion is observed by endoscope 2,After the completion of positioning, the hot water that temperature is higher than 3 transformation temperature of prostate bracket 1 and first support seat, prostate branches are injected into urethraThe meeting expanded by heating of frame 1, unclamps endoscope 2, is fixed on lesion.Due to hot water temperature also above first support seat 3 phase transformationPoint, first support seat 3 can keep band tightener to schedule the state of endoscope 2, and endoscope 2 can be from the prostate bracket of expansion at this timeIt is withdrawn in 1, prostate bracket 1 stays in lesion, is used for dilating urethra.After the completion of positioning, prostate bracket 1 discharges, in extractionSight glass 2, then dismantle and abandon first support seat 3 and operation can be completed.Compared to existing transportation system, embedded device of the inventionThe bending stiffness of endoscope 2 will not be increased considerably, and there is no the long sheaths being possible to and endoscope 2 is completely stuck, thereforeThe process that operation can greatly be facilitated, reduces the risk of injury tissue.When needing to dismantle first support seat 3, it is dipped in lowMake its expansion in the liquid of 3 phase point temperature of first support seat, endoscope 2 is extracted out.
In some embodiments, the transformation temperature of the prostate bracket 1 is 37~60 DEG C, the first support seat 3Transformation temperature is 10~20 DEG C.
Prostate bracket 1, first support seat 3 and the second support seat 4 can be prepared by two-way memory alloy.Certain conjunctionsRestore high-temperature-phase shape when gold heating, low-temperature phase shape, referred to as double-pass memory effect can be restored again when cooling.Two-way memory alloyCertain shape is automatically restored in heating and the Shi Douhui that cools down.
As shown in Fig. 2, the phase transition process of first support seat 3 is illustrated.At 0 DEG C, temperature is lower than firstThe transformation temperature of stand 3, first support seat 3 expands, and at 15 DEG C, temperature is higher than the transformation temperature of first support seat 3, first support seat3 can shrink.Temperature is reduced to 0 DEG C again, and 3 volume of first support seat can reexpand.
In the present invention, the transformation temperature of first support seat 3 is lower than body temperature, during conveying prostate bracket 1, first supportSeat 3 can keep banding stationary state.And the phase point temperature of prostate bracket 1 is higher, hot water, which need to be added, makes its expansion.
As shown in figure 3, the embedded device of second of embodiment of the invention also includes: by shape memory alloy material systemAt second support seat 4.Second support seat 4 is identical as 3 structure of first support seat.The second support seat 4 is higher than in temperatureWhen its transformation temperature, can band tightener on the endoscope 2, the second support seat 4 is lower than its transformation temperature in temperatureWhen, it can expand and be detached from from endoscope 2.When being fed forward the prostate bracket 1, the second support seat 4 is bound roundIt being tightly fixed on the endoscope 2, the proximal end of the second support seat 4 is resisted against the distal end of the prostate bracket 1,That is the two sides of prostate bracket 1 are respectively equipped with first support seat 3 and second support seat 4.
The distal end of the prostate bracket 1 is equipped with second support seat 4, is conducive to further limit prostate bracket 1,When ensuring to need to position repeatedly in transmission process, it is not close to withdraw prostate bracket 1 not and will lead to the winding of prostate bracket 1.
The transformation temperature of the second support seat 4 is 10~20 DEG C.
In above two embodiment, the material of the first support seat 3 and the second support seat 4 selects nickelTitanium alloy is the engraved structure of two-way Ultimum Ti braiding structure or laser engraving.Manufacturing process are as follows: first use memorial alloyThen silk braiding or memory alloy pipes laser engraving, 600 DEG C of shape setting heat treatments after carrying out strut carrier base from center,It is impregnated in 0 DEG C of water, then loosens it again, in room temperature underwater soaking, 50~150 times repeatedly.
The prostate bracket 1 is also made of Ultimum Ti, and Ni content is 55-56%, and surface covers biofaciesCapacitive coating covers one layer of polymeric film, organized hyperplasia or formation calculus in the gap for preventing bracket.
For 1 spiral winding of prostate bracket at spring-like structures, wherein one or both ends, which can be processed into, compares prostate1 main body of bracket is slightly thick, such as is designed to bell mouth shape, is used for auxiliary positioning.
The application method of embedded device of the invention is exemplified below: first support seat impregnated in ice water, makes its expansion,Then it covers on endoscope, waits endoscope to rise again, or being immersed in the water of room temperature makes it rise again, carrier base can be received at this timeContracting is bound round on endoscope.The prostate bracket of spring like is also packed into endoscope, is withstood on first support seat.According to clinical needIt asks, also can choose and second support seat is installed in endoscope distal end.Whole system is inserted into urethra, passes through endoscopic observation lesionPosition, after the completion of positioning, 40~60 DEG C of hot water is injected into urethra, the pipeline that hot water can be carried by endoscope is infusedEnter.Prostate bracket meeting expanded by heating, is fixed on lesion.Endoscope with carrier base is withdrawn into (second support when withdrawingSeat passes through the prostate bracket of expansion), it is immersed in ice water, carrier base is made to reexpand, dismantle, complete operation.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentionedDescription is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the inventionA variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.