CN2936163Y

CN2936163Y - Quick speed changing regulator for surgical anastomat

Info

Publication number: CN2936163Y
Application number: CN 200620123334
Authority: CN
Inventors: 陈飚; 理查德·格兰特; 方云才; 高旭宏
Original assignee: REACH SURGICAL INSTRUMENT (BEIJING) CO Ltd
Current assignee: Reach Surgical Inc
Priority date: 2006-08-03
Filing date: 2006-08-03
Publication date: 2007-08-22
Anticipated expiration: 2016-08-03

Abstract

The utility model relates to a quick variable speed regulating device for surgical anastomat, wherein, a regulating screw(2) is arranged on back casing of the anastomat body(1) and is connected with a nail anvil tie bar(7) by transmission means; a tailpiece knob(5) axially aligned with the casing is sleeved over the regulating screw(2), on which a pin(4) is movably fitted in a spiral flute(8). The device is characterized in that the spiral flute(8) on the regulating screw(2) is a variable pitch spiral flute for which the screw pitch reduces from the rear end to the front. The device can not only satisfy the quick regulating need at the starting time of the anastomat, but also can fulfill slow-speed regulation need and self-locking function at the time the anastomat approaches to stop; comparing with the single pitch advancing means, the efficiency of the device multiples more than one time; and compares with double pitch advancing means, the total rotation numbers of the utility model can be reduced for more than one third, thereby improving the operation efficiency.

Description

The quick speed changing devices of a kind of surgical anastomat

Technical field

This utility model belongs to a kind of surgical apparatus, is specifically related to a kind of disposable end-end anastomat speed changing devices.

Background technology

Digestive tract end-end anastomat is to be used for esophagus, stomach, and the pipeline broken ends of fractured bone and the broken ends of fractured bone in the surgical operations such as intestinal, lumen organizations such as the pipeline broken ends of fractured bone and cavity side fracture coincide.Referring to Fig. 1, during clinical operation, anastomat device body is inserted from a side pipe chamber, the pocket of this side-to-side anastomosis port is tightened up in the anvil pull rod (7) of stretching out nail casket (B), (A) imbeds the opposite side tube chamber with the hat nail anvil, and the pocket of this side-to-side anastomosis end tightened up in hat nail anvil (A) center connecting rod, again with the center connecting rod inserter body opposite side anvil pull rod (7) of hat nail anvil, regulate empennage turn-knob (5), making anvil pull rod (7) drive hat nail anvil (A) retreats, until hat nail anvil (A) near the nail casket (B) of device body head and clamp the pocket shape tissue of both sides, when the tissue thickness that clamps arrives safety percussion interval, depress firing handle (9), titanium seam nail in the nail casket is released, kiss is sewed up by the lumen organization of both sides connect, release the unnecessary tissue that endless knife is excised center, annular suture site simultaneously, the both sides tube chamber is communicated with, extracts anastomat from body lumen again.

In the aforesaid operations process, nail anvil (A) is with after the anvil pull rod of device body is connected, by rotating the advance and retreat of empennage turn-knob (5) drive anvil pull rod, usually the drive mechanism of anvil pull rod and empennage turn-knob is (referring to Fig. 2): in the housing of portion (1) adjusting screw(rod) (2) is housed after one's death at device, adjusting screw(rod) is with the adjusting nut (3) with the axial relative localization of housing (1) outward, fixed shank (4) embeds the helicla flute (8) on the adjusting screw(rod) (2) movingly on the adjusting nut, the empennage turn-knob (5) of device body afterbody and adjusting nut relative fixed; When rotating empennage turn-knob (5), the circumferential thereupon rotation of adjusting nut (3) (axial location), the shank on it (4) slides along the helicla flute on the adjusting screw(rod) (8), screw rod is advanced or retreats, and screw rod advances or the speed that retreats depends on spiral fluted pitch.

Usually when the nail anvil of anastomat is far away with device body distance, can advance fast, be closing the distance as early as possible, and nail anvil, then need be regulated at a slow speed when close with device body nail casket, the adjusting screw(rod) that has surgical anastomat now adopts uniform pitch or two pitch airscrew regulation technology more.The governing speed of single speed is slower, once performs the operation and will repeatedly regulate back and forth, need expend the more time, and medical personnel are very inconvenient when operation.Though the two pitch airscrew regulation technology improves to some extent, for guarantee double pitch joining place be unlikely to suddenly change excessive, total travel of its screw rod still need rotate 6～8 the circle, still be not very convenient.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned deficiency, provide a kind of surgical anastomat quick speed changing devices, this adjusting device can be accelerated the governing speed of anastomat anvil pull rod greatly, shorten operating time, and can satisfy the requirement that needs are regulated at a slow speed when nail anvil and device body end nail casket are close again.

The technical scheme that addresses the above problem is (referring to implementing illustration): this utility model is equipped with the adjusting screw(rod) (2) that is in transmission connection with anterior anvil pull rod (7) in portion's housing (1) after one's death at device, be enclosed within outside the adjusting screw(rod) (2) with the rotatable empennage turn-knob (5) of the axial relative localization of housing (1), embed helicla flute (8) on the adjusting screw(rod) (2) movingly with the relatively-stationary shank of empennage turn-knob (4), it is characterized in that: the helicla flute (8) on the described adjusting screw(rod) (2) is for from the afterbody variable-pitch auger groove that reduces gradually of pitch forward.

This utility model adjusting screw(rod) has been taked the gradual change type helicla flute, initiating terminal is a coarse pitch, reduce gradually, arrive destination terminal and become fine pitch, whole stroke transition does not gradually have catastrophe point, initial quick adjustment needs had both been satisfied in such design, the adjusting at a slow speed and the auto-lock function of needs when satisfying again near terminal point, compare with the propulsion mode of single-lead, efficient can be enhanced about more than once at least, compare with the two pitch airscrew propulsion mode, its total rotating cycle also can reduce more than 1/3, has improved the efficient of operation greatly.

Description of drawings

Fig. 1, surgical stapling overall schematic

Fig. 2, the quick speed changing devices example structure of this utility model anastomat sketch map figure

The D-D of Fig. 3, Fig. 2 embodiment is to empennage knob 5 and adjusting nut 3 and adjusting screw(rod) 2 sketch map that is in transmission connection

The structural representation of Fig. 4, the quick speed changing devices adjusting screw(rod) 2 of anastomat

1-housing 2-adjusting screw(rod) 3-adjusting nut 4-shank 5-empennage knob 6-flat key 7-anvil pull rod 8-helicla flute 8a-helicla flute clearing end (fine pitch end) 8b-helicla flute initiating terminal (coarse pitch end) 9-firing handle

Specific embodiments

This routine adjusting screw(rod) 2 is contained in device after one's death in the housing 1 of portion, be in transmission connection with the anvil pull rod 7 in the device body front shell, described empennage turn-knob 5 is in transmission connection by adjusting nut 3 and adjusting screw(rod) 2, concrete structure is: adjusting nut 3 is enclosed within outside the adjusting screw(rod) 2, adjusting nut 3 front ends axially are stuck on the step 1a of housing 1 inwall, empennage turn-knob 5 is enclosed within outside the adjusting nut, circumferential mutually fixing by flat key 6 and adjusting nut 3, shank 4 interference fit is installed is set in the adjusting nut by extruding, adjusting nut endoporus hole wall is stretched out in shank the inner, embed 8 li of the helicla flutes of adjusting screw(rod) 2 outside wall surface movingly, revolving force from empennage knob 5 can be delivered on the shank 4 by adjusting nut like this, because adjusting nut axially is stuck on the step of housing 1 inwall, can only rotate, axially motionless, so make the slip of shank 4 in the adjusting screw(rod) helicla flute be converted to the propulsive force that seesaws, promote the screw pitch screw rod and seesaw;

Helicla flute 8 is reduced gradually by the coarse pitch of initiating terminal 8b on the adjusting screw(rod), and to the fine pitch of clearing end 8a, whole stroke smooth transition does not have catastrophe point.Such design both can have been satisfied initial quick adjustment needs, the adjusting at a slow speed and the auto-lock function of needs in the time of can satisfying near termination again.

Compare with the propulsion mode of original single-lead, present embodiment efficient can be enhanced about more than once at least, compares with some two pitch airscrew propulsion modes, and its total rotating cycle also can reduce more than 1/3, improved the efficient of operation greatly, and whole operation process velocity variations is even.

Gradual change helicla flute 8 on this routine adjusting screw(rod) 2 can adopt and begin at present to popularize four machine toolings using, can well be guaranteed on processing technique.

Claims

1, the quick speed changing devices of a kind of surgical anastomat, in portion's housing (1) adjusting screw(rod) (2) that is in transmission connection with anterior anvil pull rod (7) is housed after one's death at device, be enclosed within outside the adjusting screw(rod) (2) with the rotatable empennage turn-knob (5) of the axial relative localization of housing (1), embed helicla flute (8) on the adjusting screw(rod) (2) movingly with the relatively-stationary shank of empennage turn-knob (4), it is characterized in that: the helicla flute (8) on the described adjusting screw(rod) (2) is for from the afterbody variable-pitch auger groove that reduces gradually of pitch forward.

2, the quick speed changing devices of surgical anastomat according to claim 1, it is characterized in that: described empennage turn-knob (5) is in transmission connection by adjusting nut (3) and adjusting screw(rod) (2), adjusting nut (3) is enclosed within outside the adjusting screw(rod) (2), adjusting nut (3) front end axially is stuck on the step (1a) of housing 1 inwall, empennage turn-knob (5) is enclosed within outside the adjusting nut, circumferential mutually fixing by flat key (6) and adjusting nut (3), embed helicla flute (8) lining of adjusting screw(rod) (2) outside wall surface movingly with the relatively-stationary shank of adjusting nut (3) (4).

3, the quick speed changing devices of surgical anastomat according to claim 2, it is characterized in that: described shank (4) is installed the interference fit leading thread in being set in adjusting nut (3) by extruding, adjusting nut endoporus hole wall is stretched out in shank the inner, embeds helicla flute (8) lining of adjusting screw(rod) (2) outside wall surface movingly.