CN102525588A - Tubular anastomat - Google Patents

Abstract

The invention discloses a tubular anastomat. The tubular anastomat comprises a lead screw and a regulating mechanism connected with the tail of the lead screw, wherein the regulating mechanism comprises an inner nut, a ratchet wheel, an outer nut and an elastic element. The inner nut is connected with the tail of the lead screw, and the inner nut is provided with annular teeth; the ratchet wheel is sleeved on the inner nut, and the ratchet wheel is provided with ratchets opposite to the annular teeth; the outer nut is sleeved at the tail of the inner nut and fixed with the inner nut, and the outer nut is sleeved on the periphery of the ratchet wheel; and the elastic element is sleeved at the tail of the inner nut and positioned between the inner nut and the ratchet wheel. The pressure borne by tissues required to be sutured is transferred to the regulating mechanism in a mechanical mode, and a user is prompted whether the tissues have already entered a proper engagement position by matching of the annular teeth and the ratchets, so that the tissues can be effectively prevented from being over compacted or over relaxed, and the suturing firmness is ensured.

Description

Tube type anastomat

Technical field

The present invention relates to a kind of operation and use equipment, especially a kind of tube type anastomat.

Background technology

Various tube type anastomats just are being widely used in can reducing operating time in the surgical operation, improve the operation quality.For example, Pipy digestive tract stapler often is used to be specially adapted to appear and operate comparatively difficult position in end such as esophagus, stomach, duodenum, small intestinal, colon and the rectum in digestive tract end, the distolateral and side to side anastomosis operation, and the scope of use is comparatively extensive.

Common Pipy digestive tract stapler; Its main body comprises the firing handle at forward bend pipe, middle part and is arranged on the governor motion on the rear handle; Wherein be provided with the screw mandrel that links to each other with governor motion in the bend pipe, the end of screw mandrel connects the axis of guide, and axis of guide end connects extends the outer nail supporting base of bend pipe; The bend pipe head is provided with nail bin and endless knife, and firing handle connects endless knife and pushing slice of nail through curved push rod.When operation, rotation regulating mechanism makes nail supporting base overhanging, and tissue holder to be sewed up is held between nail supporting base and the nail bin; Adjust back screw mandrel then, make spacing minimizing between nail supporting base and the nail bin, till compressing; Firing handle is released curved push rod rapidly forward then, and the interior suturing nail of promotion nail bin passes tissue and is against on the nail supporting base; Make U groove part dowel become B shape, the excess tissue of endless knife excision simultaneously part is accomplished coincideing between the tissue.After completion coincide, rotation regulating mechanism made nail supporting base overhanging, unclamping the tissue that coincide, withdrawed from Pipy digestive tract stapler.

The operator understands the spacing between nail supporting base and the nail bin for ease, is connected with pointer on the screw mandrel, on Pipy digestive tract stapler, offers indication window, and demarcation can be pulled the trigger the green area of operation.When having only in pointer gets into the green area scope, the ability firing handle is accomplished the operation that coincide; Pointer can not be opened firing handle when other zones.

Common tube type anastomat all is to come suture tissue with the minimum clearance between nail supporting base and the nail bin at present, but different tissue site thickness differs, and minimum clearance neither a fixed numeric values.Therefore when indicating the green area that supply to pull the trigger; Also tend to set a segment distance, for example, when pointer just gets into green area; Gap between nail supporting base and the nail bin is 2.5mm; When pointer will leave green area, the gap between nail supporting base and the nail bin was 1mm, differed 1.5mm between these two positions.For can better suture tissue, can only rely on clinician's experience and feel, judge whether tissue is compressed or do not get into suitable identical position, in green area, finely tune.Such operation too relies on experience, is easy to occur that the gap is too small makes tissue be stressed excessive and cause secondary damage, perhaps organizes oozing of blood because excesssive gap causes, clinical application risk is bigger, and result of use is unstable.

Summary of the invention

The purpose of this invention is to provide a kind of tube type anastomat, it can overcome the deficiency of prior art, improves the reliability of tube type anastomat, and easy to operate.

The present invention is achieved in that

A kind of tube type anastomat, the governor motion that it includes screw mandrel and is connected with said screw mandrel afterbody, said governor motion includes:

Inner nut, said inner nut are connected with the afterbody of said screw mandrel, and said inner nut is provided with annular tooth, and the flank of tooth of said annular tooth is obliquely installed;

Ratchet, said ratchet sleeve are located on the said inner nut, and said ratchet is provided with the ratchet relative with said annular tooth, and the flank of tooth of said ratchet is obliquely installed, and its incline direction is identical with the incline direction of said annular tooth;

Outer nut, said outer nut is sheathed on the afterbody of said inner nut, and fixes with said inner nut, and said outer nut is placed in the periphery of said ratchet;

And elastic component, said elastic component is sheathed on the afterbody of said inner nut, and between said inner nut and said ratchet.

Under the effect of said elastic component, ratchet on the said ratchet is cooperated with annular tooth on the said inner nut but do not mesh, when the said outer nut of turn; Driving said ratchet rotates synchronously; Under function of friction,, make said ratchet drive said inner nut and rotate through the effect of said ratchet and said annular tooth; Rotate the gap between adjustment nail supporting base and the nail bin thereby drive said screw mandrel.

When nail supporting base and nail bin begin extrusion tissue; The resistance that said screw mandrel moves is delivered on the said inner nut, and when the frictional force between said annular tooth and the said ratchet was not enough to this clothes resistance of gram, said ratchet skidded on said annular tooth surface and produces click sound; At this moment; Even continue the rotation outer nut inner nut is rotated, just can move firing handle this moment, accomplish the cutting operation that coincide.

Among embodiment, the periphery of said ratchet is provided with the sour jujube draw-in groove therein, said outer nut interior week be provided with positioning edge, said sour jujube draw-in groove cooperates with said positioning edge.Said outer nut and said ratchet are fixed, thereby when the said outer nut of rotation, said ratchet can be rotated synchronously.

Among embodiment, the tail end of said inner nut is provided with inner card cage therein, and said outer nut is provided with the buckle that cooperates with said inner card cage.Said inner nut and said outer nut are fixed, avoided when the said outer nut of rotation, said outer nut and said inner nut break away from.

Therein among embodiment, said inner nut be provided with the screw thread that cooperates with said screw mandrel interior week.Through the cooperation of screw thread, said inner nut is socketed on outside the said screw mandrel.

Among embodiment, the screw thread of said screw mandrel outer surface is a variable pitch screw therein, the speed of the said screw mandrel motion of scalable.

Tube type anastomat of the present invention compared with prior art has following beneficial effect:

The suffered pressure of organizing that tube type anastomat of the present invention will be sewed up through mechanical system is delivered to said governor motion place; And the cooperation through said annular tooth and said ratchet; The prompting user is organized and whether is got into suitable identical position; Can effectively avoid tissue too to be compressed or too loosen, guarantee the firmness of sewing up; Simultaneously, avoid the phenomenon of oozing of blood to take place again, reduce artificial factor, improve the effectiveness of operation, use safety and reliability.

Description of drawings

Fig. 1 is the structural representation of tube type anastomat of the present invention;

Fig. 2 is the cutaway view of governor motion of the present invention.

Fig. 3 is the structural representation of inner nut of the present invention;

Fig. 4 is the structural representation of ratchet of the present invention;

Fig. 5 is the structural representation that inner nut of the present invention, ratchet and elastic component cooperate;

Fig. 6 is the structural representation of outer nut of the present invention.

Description of reference numerals:

Bend pipe 10,firing handle 20, handle 30,screw mandrel 11, the axis ofguide 12 is replacedseat 13; Nail bincover 14, suturingnail 15,nail bin 16,endless knife 17, indicatingwindow 18,curved push rod 23; Pushing slice ofnail 25,inner nut 31,annular tooth 311,screw thread 312,inner card cage 313,ratchet 32; Ratchet 321, sour jujube draw-ingroove 322,outer nut 33,buckle 331,elastic component 34,positioning edge 332.

The specific embodiment

Below in conjunction with accompanying drawing embodiments of the invention are elaborated:

As shown in Figure 1, tube type anastomat of the present invention, it includes thefiring handle 20 that is positioned at itsforward bend pipe 10, middle part and is located at the adjustment structure on the rear handle 30.

Wherein, Be provided with thescrew mandrel 11 that is connected with said governor motion in the saidbend pipe 10; The end of saidscrew mandrel 11 is connected with the axis ofguide 12; The afterbody of saidscrew mandrel 11 is connected with said governor motion, is provided with indicatingwindow 18 at saidbend pipe 10 rear portions, and said indicatingwindow 18 is used to show the movement position of said screw mandrel 11.The end of the said axis ofguide 12 connect extend saidbend pipe 10outer replace seat 13, the head of saidbend pipe 10 is provided withnail bin cover 14, said nail binoverlaps 14 inside and is provided with nail bin 16 and theendless knife 17 that is used to hold suturingnail 15; Said firinghandle 20 connects saidendless knife 17 and pushing slice ofnail 25 throughcurved push rod 23.

As shown in Figure 2, said adjustment structure includes:inner nut 31,ratchet 32,outer nut 33 andelastic component 34.

Wherein, as shown in Figure 3, saidinner nut 31 is connected with the afterbody of saidscrew mandrel 11, and the periphery of saidinner nut 31 is provided withannular tooth 311, and the flank of tooth of saidannular tooth 311 is obliquely installed.For saidinner nut 31 can be connected with saidscrew mandrel 11, the inwall of saidinner nut 31 is provided with the screw thread that cooperates with saidscrew mandrel 11, and saidinner nut 31 is nested with said screw mandrel 11.Screw thread 312 on the saidscrew mandrel 11 is variable pitch screw (as shown in Figure 2), wherein between pitch big, both sides pitch is little.

Saidratchet 32 is sheathed on the saidinner nut 31; As shown in Figure 4; The periphery of saidratchet 32 is provided with theratchet 321 relative with saidannular tooth 311, and the flank of tooth of saidratchet 321 is obliquely installed, and the incline direction of saidratchet 321 is identical with the incline direction of saidannular tooth 311.

Like Fig. 2 and shown in Figure 6, saidouter nut 33 is sheathed on the afterbody of saidinner nut 31, and fixes with saidinner nut 31, and saidouter nut 33 is placed in the periphery of said ratchet 32.For avoiding in the process of the saidouter nut 33 of rotation; Saidouter nut 33 breaks away from saidinner nut 31; Saidinner nut 31 tail ends are provided withinner card cage 313; Saidinner card cage 313 can be preferably annular slot, and saidouter nut 33 is provided with thebuckle 331 that cooperates with saidinner card cage 313, and saidbuckle 331 with saidouter nut 33 of saidinner card cage 313 engagement limits and saidinner nut 31 axially-movable takes place.

Saidelastic component 34 is sheathed on the afterbody of saidinner nut 31, and between saidinner nut 31 and said ratchet 32.In this preferred embodiment, saidelastic component 34 is the compression spring, and saidelastic component 34 compresses saidratchet 32, makes theratchet 321 of saidratchet 32 and theannular tooth 311 of saidinner nut 31 support and not mesh.

In addition; In order to make the saidratchet 32 can be fixing with saidouter nut 33, the periphery of saidratchet 32 be provided with sour jujube draw-ingroove 322, saidouter nut 33 be provided with positioningedge 332 interior week; Said sour jujube draw-ingroove 322 cooperates with saidpositioning edge 332; Saidouter nut 33 is fixing with saidratchet 32, thus when the saidouter nut 33 of rotation, saidratchet 32 can be rotated synchronously.

When using said anastomosis ring applicator, be rotated counterclockwise saidouter nut 33 earlier, because the effect of saidratchet 321 and saidannular tooth 311, saidratchet 32 drivesinner nut 31 and rotates counterclockwise; Screwthread 312 on the saidscrew mandrel 11 is a variable pitch screw, but fast moving, and it is overhanging to promote the said axis ofguide 12, makes saidnail supporting base 13 away from outside the saidbend pipe 10; At this moment, can smoothly the tissue that needs to coincide be embedded between saidnail supporting base 13 and the said nail bin 5, the tissue that needs are sewed up carries out pretreatment.

After organized processing that needs are sewed up is good, the saidouter nut 33 that turns clockwise, under the elastic force effect of saidelastic component 34, saidratchet 32 still is against on the saidannular tooth 311, drives saidinner nut 31 through frictional force and clockwise rotates; The saidouter nut 33 that continues to turn clockwise, saidnail supporting base 13 moves towards said nail bin 16 directions, and saidnail supporting base 13 slowly begins to push needs the tissue sewed up.When the tissue of needs stitching is extruded to a certain degree; Pointer on the saidscrew mandrel 11 gets in the green area in the said indicatingwindow 18; Expression can be pulled the trigger saidfiring handle 20, and the tissue that still need sew up is not extruded and puts in place, if this moment, oozing of blood may appear in stitching.Continue to clockwise rotate saidouter nut 33; The pressure that the tissue of sewing up along with needs is extruded is increasing; The also corresponding increase of the resistance that saidscrew mandrel 11 moves; When this resistance surpasses the frictional force between saidratchet 32 and the saidannular tooth 311, skidding appears between saidannular tooth 311 and the saidratchet 32, and continue the saidouter nut 33 of rotation saidinner nut 31 is rotated; Distance remains unchanged between saidnail supporting base 13 and the said nail bin 16; Need organizing of stitching also to be under the comparatively safe squeeze pressure, can hear the click sound that saidratchet 321 skids and produces this moment on saidannular tooth 311, and the pointer in the said indicatingwindow 18 also is positioned at green area.At this moment; Move saidfiring handle 20; Saidcurved push rod 23 promotes saidendless knife 17 and said pushing slice ofnail 25 fast moving, promotes suturingnails 15 in the saidnail bin 16 and passes and need the tissue of sewing up and be against on the saidnail supporting base 13, makes the shape of suturingnail 15 become Type B by the U type; Simultaneously saidendless knife 17 excision excess tissue parts are accomplished coincideing between the tissue.

The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.

Claims (5)

1. tube type anastomat, the governor motion that it includes screw mandrel and is connected with said screw mandrel afterbody is characterized in that said governor motion includes:

Inner nut, said inner nut are connected with the afterbody of said screw mandrel, and said inner nut is provided with annular tooth, and the flank of tooth of said annular tooth is obliquely installed;

Ratchet, said ratchet sleeve are located on the said inner nut, and said ratchet is provided with the ratchet relative with said annular tooth, and the flank of tooth of said ratchet is obliquely installed, and its incline direction is identical with the incline direction of said annular tooth;

Outer nut, said outer nut is sheathed on the afterbody of said inner nut, and fixes with said inner nut, and said outer nut is placed in the periphery of said ratchet;

And elastic component, said elastic component is sheathed on the afterbody of said inner nut, and between said inner nut and said ratchet.

2. tube type anastomat according to claim 1 is characterized in that the periphery of said ratchet is provided with the sour jujube draw-in groove, said outer nut interior week be provided with positioning edge, said sour jujube draw-in groove cooperates with said positioning edge.

3. tube type anastomat according to claim 1 is characterized in that the tail end of said inner nut is provided with inner card cage, and said outer nut is provided with the buckle that cooperates with said inner card cage.

4. tube type anastomat according to claim 1 is characterized in that, said inner nut be provided with the screw thread that cooperates with said screw mandrel interior week.

5. tube type anastomat according to claim 4 is characterized in that, the screw thread of said screw mandrel outer surface is a variable pitch screw.

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