CN204293211U - Suture cutter - Google Patents

Abstract

Suture cutter.Suture cutter can comprise actuator, intermediate casing portion and movable cutting assembly.With actuator operable the cutting assembly that is coupled to comprising cutting element.The cutting window receiving slot zygonema of adjustable dimension.The cutting window of adjustable dimension can be bordered on cutting element at least one side, for cutting the suture be received in inside cutting window.Actuator moving cutter assembly is with cutting and stitching line.

Description

Suture cutter

Technical field

The utility model relates generally to for the equipment at intra-operative cutting and stitching line.Especially, the utility model relates to during Minimally Invasive Surgery, such as based on the surgery of conduit, for the equipment of cutting and stitching line.

Background technology

In the U.S., heart disease is dead first cause.Every day, about 2000 Americans die from heart disease.The pathology affecting heart has many kinds.A kind of modal pathology is mitral incompetence.Mitral incompetence occurs in heart shrinkage period bicuspid valve can not close fluid between atrium sinistrum and right ventricle when being communicated with completely.In this case, leaflet of mitral valve can not close tight completely or close, and oxygenated blood flows back to atrium sinistrum from left ventricle with retrograde manner.

Current, be open heart operation for repairing the most common methods of mitral incompetence.During open heart operation, the thoracic cavity of patient is opened to produce the enough large cavity for close to heart.A kind of common surgical comprises and being sewn on annulus of mitral valve from above via the otch in heart atrium sinistrum by valve forming ring.In addition, other operations using suture material in heart or around heart can also be used in.

Minimally Invasive Surgery, and especially through chamber or through skin delivery instrument in patient, in various operation application, become more and more common.Promising openheart surgery frontier comprises the Minimally Invasive Surgery based on conduit.The Minimally Invasive Surgery based on conduit for such as mitral valve repair reduces usually relevant with open heart operation risk, and will reduce because the wound to patient opened thoracic cavity and cut heart wall and cause.

Usually, in Minimally Invasive Surgery, a subject matter more specifically with the relevant Minimally Invasive Surgery of heart to use traditional suture cutting equipment.Such as, traditional hand-held scissors-type suture cutter is unsuitable for the Minimally Invasive Surgery based on conduit.Therefore, Minimally Invasive Surgery needs one of problem solved to be need Wicresoft's thread cutting knife of improvement and the method for cutting and stitching line in Minimally Invasive Surgery.

Summary of the invention

The utility model proposes one and be positioned at the sutural suture cutter of patient for cutting, it comprises: actuator, and it is handled by medical worker, intermediate casing portion, its operationally with actuator, and cutting assembly, its operationally with intermediate casing portion and actuator, wherein said cutting assembly comprises movable cutting element and adjustable dimension cutting window, described cutting element moves and comprises being formed at the opening of wherein through-hole form being formed in the slit in blade housing, described adjustable dimension cutting window is at least in part by described limited opening, wherein said slit ends at the blind end being positioned at blade housing distal nearside, and be positioned between cutting window and blade housing distal, the blind end of described slit limits the degree of advancing of the cutting element be arranged in wherein, described blade housing has the first aperture for allowing suture to forward blade housing to from outside, and the second aperture for allowing suture to forward blade housing to from outside, each outer surface along blade housing in first aperture and the second aperture is formed and opening, described first aperture longitudinally deviates from the second aperture and compared to the second aperture more near far-end, wherein said blade housing has the stationary conduit be formed in wherein, it connects and extends between the first aperture and the second aperture, described stationary conduit is defined by the hole wall of the angled hole formed in blade housing, slit intersects with stationary conduit, thus make the Part I of angled wall be positioned on the side of slit and cutting element, the Part II forming angled wall is positioned on the opposite side of slit and cutting element, wherein said cutting assembly reduces along with cutting the size of window when drive actuator, and cutting is received in the suture inside cutting window.

Further, described suture cutter, wherein said cutting element also comprises the blade with sharp cutting edge.

Further, described suture cutter, wherein said cutting element is on the side of cutting window, and at least part of slit is on the opposition side of cutting window, wherein said cutting window can receiving slot zygonema, and described suture moves into slit along with cutting element and is cut.

Further, described suture cutter, wherein said slit comprises the longitudinal slit be formed in blade housing.

Further, described suture cutter, wherein said first aperture setting is on the side of cutting element, and the second aperture setting is on the opposite side of cutting element, and wherein said channel reception is through cutting window from the first aperture through the suture to the second aperture.

Further, described suture cutter, wherein said intermediate casing portion also comprises the vascular system conduit being guided through patient.

Further, described suture cutter, wherein said actuator also comprises biased element, and it is configured to usually keep described cutting assembly to be biased into the home of non-cutting.

Further, described suture cutter, cutting assembly is moved to cutting position by the bias voltage that wherein said actuator is configured to provide against biased element.

Further, described suture cutter, wherein said actuator also comprises the trigger that can move to active position from un-activated position, when described un-activated position, described trigger can not be used for driving cutting assembly to carry out cutting and stitching line, when described active position, described trigger can be used in driving cutting assembly to carry out cutting and stitching line.

Further, described suture cutter, wherein said blade is located along the farthest side of opening, and this causes through hole to be formed at the nearside of blade.

The utility model also proposes one and is positioned at the sutural suture cutter of patient for cutting, and it comprises: actuator, and it is handled by medical worker, intermediate casing portion, it is operationally coupled to actuator, and cutting assembly, its operationally with intermediate casing portion and actuator, wherein said cutting assembly comprises blade housing and cutting element, described cutting element moves and comprises sharp cutting edge and opening being formed in the slit in blade housing, described opening is positioned at cutting edge nearside, described cutting edge is exposed along the side of opening, described slit ends at blind end, described blind end is positioned at the far-end nearside of blade housing, the blind end of described slit limits the degree of advancing of described cutting element, wherein said cutting assembly also comprises the cutting window of adjustable dimension, the cutting window of described adjustable dimension limits by described opening and by the inner surface of a passage at least in part, described passage is formed at the fixed position place in blade housing and allows to pass the suture through, wherein the bottom of slit is crossing with the inner surface of described passage, wherein said cutting assembly reduces along with the size of cutting window when drive actuator and contacts with sutural due to sharp cutting edge, and cutting is received in the suture inside cutting window.

Further, described suture cutter, wherein said passage comprises longitudinal component and angled portion, and described longitudinal component longitudinally runs and ends at the first aperture, described angled portion forms certain angle with vane body width, and ends at the second aperture.

Further, described suture cutter, the far-end of wherein said longitudinal component and slit is isolated by wall.

Further, described suture cutter, wherein said first aperture is formed in the far-end of blade housing.

Further, described suture cutter, wherein said cutting element has flat shape, and described slit comprises longitudinal slit with flat shape.

In an exemplary embodiment, for cut sutural suture cutter in patient body comprise handled by medical worker actuator, be operationally coupled to actuator for the intermediate casing portion that inserts in patient and the cutting assembly being operationally coupled to intermediate casing portion and actuator.In each embodiment, described sleeve pipe can be may not be configuration and size is appropriate to insert the intubate of the circulatory system of patient.

Specifically, described cutting assembly comprises the cutting window of adjustable dimension, and reduces when drive actuator along with the size of cutting window, and the suture that described cutting assembly will be received in inside cutting window cuts off.

Described cutting element self can comprise blade, described blade has sharp cutting edge, such as monocline face or double inclined plane cutting edge, or described cutting element can comprise the element of other types, can be such as sharp or stubbed but can be energized for blowing sutural element during cutting operation by radio frequency (RF).This suture can be cut by against the element as " anvil ", or suture can be moved to suitable reception space, such as slit by cutting element.Cutting element housing is included in the first aperture on cutting element first side and the second aperture on cutting element opposite side.In this embodiment, described suture passes cutting window to the second aperture by the first aperture.

Described actuator also can comprise biased element, and it is configured to cutting element be remained on usually the home being biased into non-cutting, or in other words, non-actuated position.Cutting assembly is moved to cutting position by the bias voltage that then actuator provides against biased element.Described biased element self such as can comprise disc spring.Described actuator also can comprise trigger, it is movable to active position from un-activated position, such as pass through transverse to the rotation on the direction of tractive trigger, at described un-activated position, wherein trigger can not be used for moving cutter assembly and carrys out cutting and stitching line, at described active position, wherein said trigger may be used for moving cutter assembly and carrys out cutting and stitching line.

The utility model additionally provides a kind of cutting and is placed in sutural method in patient body, the method comprises and is positioned in patient body by suture cutter, wherein suture cutter comprises cutting element and the second element, and described second element limits the cutting window of adjustable dimension at least in part.Described suture is guided through described cutting window, and the size of cutting window is reduced because at least one in cutting element or the second cutting element moves to suture.Then, described suture is cut element cutting.

Understand following exemplary embodiment detailed description after, various other or alternative technical characteristic will become apparent to those skilled in the art.

Accompanying drawing is sketched

Accompanying drawing forms a description part, and is used for being described in more detail exemplary embodiment of the present utility model.

Fig. 1 is the perspective view of the suture cutter of an exemplary embodiment;

Fig. 2 is the enlarged perspective at the tip axially movable far away of the suture cutter of Fig. 1;

Fig. 3 is the profile of suture cutter along the longitudinal axis of suture cutter actuator or proximal end of Fig. 1.

Fig. 4 A is the amplification profile front view at the tip axially movable far away of the suture cutter of anticipating shown in Fig. 1, wherein passes the suture through cutting window.

Fig. 4 B is the amplification profile front view at the tip axially movable far away of the suture cutter of anticipating shown in Fig. 4 A, is wherein axially moveable tip and before cutting and stitching line, proximal direction is moved.

Fig. 4 C is the amplification profile front view being axially moveable tip far away of the suture cutter of anticipating shown in Fig. 4 B, and it further illustrates suture and is cut.

Fig. 5 be the suture cutter of anticipating shown in Fig. 1 be axially moveable amplification profile front view far away most advanced and sophisticated, which illustrate cooperating of cutting blade and chopping block.

Fig. 6 is that the line of cut stitching unstrument of schematic diagram 1 inserts the interior also cutting of conduit close to the mitral sutural perspective view of heart.

Fig. 7 is the front view of the suture cutter conduit illustrated according to another embodiment, and cuts the many sutures or sutured portion that extend from suture lock during illustrating folding or annuloplasty.

Fig. 8 A, 8B and 8C are the profiles of suture cutter distal portions, and show suture cutting operation.

Fig. 9 is the perspective view of the suture cutter conduit according to another embodiment, and illustrates cutting many sutures or sutured portion.

Figure 10 is the zoomed-in view of the actuation part of the suture cutter conduit shown in Fig. 9.

Figure 11 is the profile got along the line 11-11 of Fig. 9, and shows the trigger mechanism being in un-activated position.

Figure 12 is the profile being similar to Figure 11, but shows the trigger mechanism being in active position.

Figure 13 is the profile of handle and the actuation part got along the line 13-13 of Figure 12.

The detailed description of exemplary embodiment

Fig. 1 and 2 illustrates suture cutter 10, and it is configured to pipe guide, comprises the proximal portion 12 be made up of Handleset 14 and the distal portion be made up of cutting assembly 18.Suture cutter 10 can be used for any Minimally Invasive Surgery, the Minimally Invasive Surgery comprising by or must do not introduced by the guide bushings of such as percutaneous catheter in patient body.Any other rigidity or flexible guide bushings also can accept suture cutter.Flexible intermediate conductor portion or other rigidity or flexible sleeve portion 20 extend between the proximal portion 12 and distal portion 16 of suture cutter 10.The example provided herein is flexible heart conduit part 20, its size and being configured to for introducing the vascular system leading to such as patient's heart.But it should be noted that, by rigid casing portion, such as some endoscope or laparoscopic technique, also may implement other Minimally Invasive Surgery technology better.As used herein, term " conduit " is used in reference to minor diameter casing-type, and it inserts in body cavity, in the artery of such as vascular system.There is the conduit of interruption centre shown in Fig. 1, its object is just conveniently illustrated, in fact the whole length in intermediate conductor portion 20 can be such as about 80cm to about 140cm, when therefore using together with other pipe guides, doctor can guide catheter device from the femoral artery of patient to the heart of patient.Described conduit, such as repairing the intra-operative of heart based on conduit, such as during the Supramitral annuloplasty of heart or folding operation, uses during suture cutter 10 and just can play a role.Such as, such prosthesis at U.S. Patent application 11/174,951 and the patent application U.S. Patent application 11/685,240 that had previously been incorporated to have and describe in further detail, the disclosure of above patent application is contained in this by introducing.

Handleset 14 comprise fixing grasping part 22 and along slit 26 be mounted to fixing grasping part 22 slidably or removable grasping part or trigger 24.Fig. 3 illustrates slidably grasping part 24 and is coupled to silk thread 28 rigidly, maintenance in the tubular sheath 30 that described silk thread 28 is encapsulated in slit 26 place and intermediate conductor portion 20 in and slidably.The near-end 32 of tubular sheath 30 is fixed to the threaded assembly 34 being positioned at slidably grasping part 24 cylindrical portion 38 cavity.In one embodiment, pin 34 can promote the connection with energy source, thus provides the energy of such as heat energy or RF (radio frequency) energy to silk thread 28.As being shown in Fig. 4 A-4C best, silk thread 28 is divided into or is coupled to two independent silk threads 40,42, they have far-end 40a, 42a of being fixed to and being axially moveable distal incision element or blade housing 46, the blade 48 that described housing load extends between silk thread 40,42.

Referring again to Fig. 1, the fixing grasping part 22 of Handleset 14 comprises ring 50, and it is suitable for the thumb receiving user, and the slidably grasping part 24 of Handleset 14 comprises finger-like opening 52,53.Therefore, Handleset 14, except being produced on slidably grasping part 24 by traction action in proximal direction and driving, is similar to injector operations to a certain extent.Referring again to Fig. 1 and 2, distad move in the slidably portion 24 of Handleset 14, distal incision element 46 leaves from the far-end 54 of middle conduit part 20, and then the region exposed between two silk threads 40,42 or window 56.In institute's exemplary embodiment, this region is limited by the window 56 between two fine rules or other components 40,42.In another embodiment, the window 56 that this region can also be defined by means of only a rhizoid line or other components, or the window of the other types that it will be apparent to those skilled in the art that.Or, Handleset 14 movably or slidably grasping part 24 is along slit 26 proximal motion time, silk thread 40,42 also proximad is pulled, and then proximad moves distal incision element 46 to the movement of one or more suture 58 (for illustrative purpose, only illustrating a suture).

In exemplary embodiment, distal incision element or blade housing 46 are connected to Handleset 14 by two rhizoid lines 40,42, but other embodiments only can use the connecting elements of a rhizoid line or other types.Distal incision element 46 comprises the blade 48 towards nearside, for cut be included in adjustable dimension window 56 in suture 58, described window 56 is limited between blade 48 and intermediate conductor portion 20.In institute's exemplary embodiment, blade 48 is bow, but in other embodiments, blade 48 can have different geometries.In institute's exemplary embodiment, the window of adjustable dimension 56 by silk thread 40,42, the far-end 54 in intermediate conductor portion 20 and the sharp knife edges of blade 48 limit.One of skill in the art will appreciate that such as blade 48 can be positioned at far-end 54 place in intermediate conductor portion 20 and stretch to distally in other embodiments.Cutting element 46 comprises the soft outer cover 60 be usually made up of elastomeric material, such as foam or other soft polymer or elastomeric material.Outer cover 60 help prevent such as suture cutter to be introduced during heart and during the cutting of suture 58 to the infringement of heart tissue.

As further illustrated by FIG. 1, intermediate conductor portion 20 have proximal portion 62, distal portion 64 and between proximal portion 62 and distal portion 64 extend tube chamber 66 (Fig. 4 A-4C).Intermediate conductor portion 20 generally includes tubular flexible sheath.In one embodiment, tubular sheath can be formed by the Web materials being coated with bio-compatible material, the silicones of such as surgical grade or polymer.In other implementations, tubular sheath can use other materials to make by those skilled in the art according to actual needs.Tubular sheath can be level and smooth and have low fluid friction coefficient, thus allows the vascular system being introduced through patient easily, such as, through suitable guiding catheter (not shown).

As Fig. 2 illustrates better, intermediate conductor portion 20 comprises neck 70, and it is transitioned into from the small diameter of middle conduit part 20 larger diameter ending at cutting assembly 18.Major part silk thread 40,42 remains on the inner side in tubular sheath or intermediate conductor portion 20, thus convenient sliding motion inside tubular sheath tube chamber.But as shown in figs. 4 a-4 c, neck 70 represents and is transitioned into from hollow tubular sheath the distal portion 71 being generally solid.Common solid distal portion 71 supports silk thread 40,42 along with silk thread 40,42 motion or slip during blade movement.Solid distal portion 71 can also stop body fluid to enter tube chamber 66 in large quantities.In addition, during cutting operation described below, the distally solid part 71 in tubular sheath or intermediate conductor portion 20 provides quite flat cutting surfaces or chopping block 72 (Fig. 2 and 4A) at far-end 54.Intermediate conductor portion 20 is connected to conduit tube component 14 by connector, described connector before extending to Handleset 14 gradual change to larger diameter.In institute's exemplary embodiment, proximal portion 12 and intermediate conductor portion 20 can have the length of about 80cm to about 140cm.It will be understood by those skilled in the art that and can use longer or shorter nearside and intermediate conductor portion in various embodiments.

Fig. 4 A-4C illustrate in more detail the cutting of suture 58.In Figure 4 A, suture 58 is through window 56.Blade 48 is positioned in guard shield 72, and described guard shield 74 limits the inner space in cutting element 46.Blade 48 is rigidly fixed in substrate 78, and then is held in place by blade 48 during cutting.The motion that Fig. 4 B illustrates silk thread 40,42 proximad guides cutting element 46 into far-end 54.Guard shield 74 is contact suture 58 before blade 48 contacts stitching money 48, and is therefore located by suture 58, keeps or stablize, and ensures effective cutting action.Fig. 4 C illustrates blade 48 and contacts and cutting and stitching line 58.Along with blade 48 cuts off suture 58 and the flat cut surface contacted on tubular sheath 68 or chopping block 72, guard shield 74 is slightly compressed.

Fig. 5 provides the CONSTRUCTED SPECIFICATION of more blade 48 and cutting element 46.Fig. 5 rotates 180 ° of acquisitions by the view of Fig. 4 A-4C.The shape of blade 48 is conducive to during suture 58 cuts, the encapsulation of cutting surfaces or chopping block 72.Flat surfaces or chopping block 72 are formed by elastomeric material, such as elastic polymeric material, thus allow blade 48 to penetrate and/or slightly oppress chopping block 72.

Fig. 6 illustrates an illustrative application of suture cutter 10.Start, in this illustrative example, guiding catheter 80 is weaving through vascular system, thus makes it eventually extend through sustainer, aorta petal enter the left ventricle 86 of patient's heart 82.Suture 58 extends from anchor log or securing member 84, or such as only extends from tissue, and extends much further into guiding catheter 80, leaves patient at the near-end (not shown) to guiding tube 80.Although suture 58 is preferably but without the need to the window 56 through suture cutter 10 before patient introduced by suture cutter 10.Suture cutter 10 inserts guiding catheter 80 and is leaving guiding catheter 80 close to inside patient's heart 82 left ventricle 86 of bicuspid valve 88.Medical worker is by being placed in finger-like opening 52,53 respectively and their thumb being carried out the suture cutter 10 at joystick assembly 14 (Fig. 1) place through ring 50 by their middle finger and forefinger.Cutting element 46 can be positioned at desired locations by control crank assembly 14 by medical worker.Medical worker then by retracting their middle finger and forefinger, and slidably grasping part 24 along fixing grasping part 22 proximal motion.Described by composition graphs 4A-4C, slidably the proximad of grasping part 24 motion drive cutting element 46 and guide blade 48 into cutting surfaces 72, and cutting and stitching line 58.

According to another embodiment, as shown in Figure 7, suture cutter 100 passes along the many sutures 102,104,106 through guiding catheter 108.In this, suture cutter 100 comprises intermediate conductor portion 110 and comprises the distal portion of cutting assembly 112.Signal as best in Fig. 8 A, 8B and 8C institute, the reciprocal male contact type blade 116 that cutting assembly 112 generally includes blade housing 114 and is slidably mounted in wherein, described blade 116 has cutting edge 116a.Blade 116 is arranged in blade housing 114, can reciprocatingly slide, move.Slit 118 ends at the blind end 119 of blade housing 114 far-end 115 nearside, and for limiting the degree of advancing of the cutting element (blade 116) be arranged in wherein.As shown, slit 118 is with the form of longitudinal slit, and it has with plane blade 116 complementation and the planar configuration of receiving plane blade 116.Blade 116 comprises opening 120, and suture 102,104,106 extends the blade 116 crossed in housing 114 through opening 120.As shown in Figure 8 C, to be that blade obtains a part of for opening 120.Blade 116 also comprises the link 122 be coupled with actuation element 124, described actuation element 124 such as can comprise silk thread in conduit part 110 tube chamber 110a or other components.Described actuation element 124 can in fig. 8 a in the direction of arrow tractive so that blade 116 is moved in a proximal direction.As described by first embodiment, user can be realized by the suitable handle that is coupled with actuation element 124 or trigger elements (by being positioned at the trigger mechanism (not shown) outside patient).It should be understood that and the actuator of any other type can be used to substitute shown and to describe.Blade housing 114 comprises first aperture 126 at its far-end 115 (far most advanced and sophisticated) place and second aperture 128 relative with the first aperture 126 along its side.As shown in figures 8 a-8 c, in blade housing 114, (in position) forms inner passage or passageway (opening) the first aperture 126 to be connected to the second aperture 128 (the first aperture and the second aperture 126,128 have fixed position).First aperture and the second aperture 126,128 are formed along the inner surface of blade housing.Inner passage has the Part I ending at the first aperture 126 and the Part II ending at the second aperture 128.Signal as best in Fig. 8 A and 8B institute, Part II is an angled passages, and the width along blade housing 114 extends, and wherein Part I is passage extending longitudinally, ends at the first aperture 126.In blade housing 114, have one to be formed in blade housing 114 also along the hole that the width of blade housing 114 extends, this hole is angled with blade casing centerline, and the hole wall of this hole forms one with the angled logical road of blade casing centerline.Wherein slit 118 (namely, its bottom surface sections 125) intersect with angled passages, thus angled passages is divided into two parts, be positioned at the first wall portion 121 on slit 118 and cutting element side and be positioned at the second wall portion 123 on slit 118 and cutting element opposite side.Part I is separated by the wall shown in Fig. 8 A and 8B and slit 118.Like this, suture 102,104,106 can pass aperture 126, through blade 116 opening, extend into blade housing 113 through aperture 128 subsequently, as shown in Figure 8 A.As Fig. 8 B and 8C illustrates further, tractive actuation element 124 causes blade 116 to move in a proximal direction, thus make cutting edge 116a by or do not intersected with sword 118a by shear action, as Fig. 7 the immediately nearside point place of the suture lock 132 for the tissue fold 140 between suture tissue anchor 142 that illustrates suture 102,104,106 is cut off.Cutting edge 116a can design as required, can also be double inclined plane design except shown single inclined design.As shown in Figure 8 C, cutting edge 116a is positioned at the farthest side along blade openings 120, and this causes blade openings 120 (being formed in the through hole in blade) near cutting edge 116a.Therefore cutting edge 116a is positioned at the side of opening 120 and is exposing along the side of opening 120.

Fig. 9-13 illustrates another embodiment of the suture cutter 150 passed along many sutures 102,104,106.In this embodiment, there is for the given like reference numerals in aforementioned figures the similar structural element of identity function.Suture cutter 150 comprises intermediate conductor portion 110 and distal portion, and it comprises cutting assembly 112 and blade housing 114.Cutting assembly 112 and intermediate conductor portion 110 configurable and be designed to meaning as indicated previously and description, be not further described at this.The near-end of suture cutter 150 comprises handle 152 and trigger mechanism 154.As best illustrated in figure 9, connector 155 is fixed to distal handle portion 152a.Fluid flushing mouth 156 is parts of connector 155, and connects intermediate conductor portion 110 by connector 157, to allow intermediate conductor portion 110 to pass through such as normal saline flushing, thus before entering patient, discharges any air in intermediate conductor portion 110.For this purpose, as shown in figure 13, the tube chamber 156a of part 156 is communicated with tube chamber 156b.

Trigger mechanism 154 is designed to rotatable and longitudinally-slidable trigger 158.The design permission suture cutter 150 of trigger mechanism 154 can in latched position " locking " and " unblock ".When latched position, trigger 158 can not drive cutting assembly 112 to carry out cutting and stitching line, and at non-locked position, trigger 158 can be pulled with and then usually drive cutting assembly 112 with above-mentioned about the same way described in Fig. 8 A-8C.The best illustrates as described in Figure 10, and trigger 158 comprises ring part 160, and it remains on the distal portion of handle 152 slidably.The distal portion 152a of handle 152 comprises groove 162a, 162b, 162c, and the pin 164 of trigger 158 end is fixed by they.When pin 164 is in the first short groove 162a be contained in distal handle portion 152a, trigger 158 can not be pulled in a proximal direction and can not be used for driving the blade associated with cutting assembly 112 (Fig. 9).But, trigger 158 rotate about 90 ° to make pin 164 be rotated through transverse groove 162b and to be aligned to longer longitudinal slit 162c time, trigger 158 can be pulled on nearside.Figure 11 shows inactive or locking trigger position, and Figure 12 shows activity or unlocks trigger position.

Actuation element 170 to be positioned in handle 152 and usually by fexible bias pressure in wind spring 172 distal direction, thus blade 116 is remained on non-cutting position (Fig. 8 A).As Figure 11 and 12 the best illustrates, actuation element 170 is positioned at the eccentric position of rotating shaft 174 relative to trigger 158 and ring part.Therefore, when trigger 158 rotates about 90 °, the tip of pin 164 by from shown in Figure 11, the position that is separated with actuation element 170 rotate to shown in Figure 12, the position of engaging with the external tooth be formed on actuation element 170 or ridge 170a.Therefore, as best seen in figure 13, once the tip of pin 164 with in tooth or ridge 170a one aim at, the proximal direction that trigger 159 can be illustrated at arrow 176 is pulled.This is by the mobile actuation element 170 comprising connected silk thread portion 124, for previously described object.

Figure 13 also illustrate at the storage of suture cutter 150 and In transit by the detachable locking element 180 of actuation element 170 locks in place.In this, locking member 180 can be inserted through the corresponding hole 182,184 in ring part 160 and distal handle portion 152a, thus makes pin portion 180a prevent trigger 158 and ring part 160 to leave the locking shown in Figure 11 or passive position to rotate to the position shown in Figure 12.User removes pin 180, thus allows to rotate and driving trigger mechanism 154 as just mentioned.

Although the utility model is described by the description of each preferred embodiment, although and for some details of these embodiments, also done description to a certain degree herein, but the scope of appended claims has been imposed any restrictions by the description meaning of preferred embodiment and some details by any way.There is many other advantages apparent and amendment to those skilled in the art.Various feature of the present utility model can be used alone based on the demand of user and preference, also can be combined use.This enforcement method for optimizing of the present utility model being communicated with currently known road forms description of the present utility model.But the utility model self should be as the criterion with appending claims.

Claims (15)

1. be positioned at the sutural suture cutter of patient for cutting, it comprises:

Actuator, it is handled by medical worker;

Intermediate casing portion, its operationally with actuator;

And cutting assembly, its operationally with intermediate casing portion and actuator, wherein said cutting assembly comprises movable cutting element and adjustable dimension cutting window, described cutting element moves and comprises being formed at the opening of wherein through-hole form being formed in the slit in blade housing, described adjustable dimension cutting window is at least in part by described limited opening, wherein said slit ends at the blind end being positioned at blade housing distal nearside, and be positioned between cutting window and blade housing distal, the blind end of described slit limits the degree of advancing of the cutting element be arranged in wherein, described blade housing has the first aperture for allowing suture to forward blade housing to from outside, and the second aperture for allowing suture to forward blade housing to from outside, each outer surface along blade housing in first aperture and the second aperture is formed and opening, described first aperture longitudinally deviates from the second aperture and compared to the second aperture more near far-end, wherein said blade housing has the stationary conduit be formed in wherein, it connects and extends between the first aperture and the second aperture, described stationary conduit is defined by the hole wall of the angled hole formed in blade housing, slit intersects with stationary conduit, thus make the Part I of angled wall be positioned on the side of slit and cutting element, the Part II forming angled wall is positioned on the opposite side of slit and cutting element, wherein said cutting assembly reduces along with cutting the size of window when drive actuator, and cutting is received in the suture inside cutting window.

2. suture cutter according to claim 1, wherein said cutting element also comprises the blade with sharp cutting edge.

3. suture cutter according to claim 1, wherein said cutting element is on the side of cutting window, and at least partly slit is on the opposition side of cutting window, wherein said cutting window can receiving slot zygonema, and described suture moves into slit along with cutting element and is cut.

4. suture cutter according to claim 1, wherein said slit comprises the longitudinal slit be formed in blade housing.

5. suture cutter according to claim 3, wherein said first aperture setting is on the side of cutting element, and second aperture setting on the opposite side of cutting element, wherein said channel reception through cutting window from the first aperture through to the suture in the second aperture.

6. suture cutter according to claim 1, wherein said intermediate casing portion also comprises the vascular system conduit being guided through patient.

7. suture cutter according to claim 1, wherein said actuator also comprises biased element, and it is configured to usually keep described cutting assembly to be biased into the home of non-cutting.

8. suture cutter according to claim 7, cutting assembly is moved to cutting position by the bias voltage that wherein said actuator is configured to provide against biased element.

9. suture cutter according to claim 1, wherein said actuator also comprises the trigger that can move to active position from un-activated position, when described un-activated position, described trigger can not be used for driving cutting assembly to carry out cutting and stitching line, when described active position, described trigger can be used in driving cutting assembly to carry out cutting and stitching line.

10. suture cutter according to claim 2, wherein said blade is located along the farthest side of opening, and this causes through hole to be formed at the nearside of blade.

11. 1 kinds are positioned at the sutural suture cutter of patient for cutting, and it comprises:

Actuator, it is handled by medical worker;

Intermediate casing portion, it is operationally coupled to actuator;

And cutting assembly, its operationally with intermediate casing portion and actuator, wherein said cutting assembly comprises blade housing and cutting element, described cutting element moves and comprises sharp cutting edge and opening being formed in the slit in blade housing, described opening is positioned at cutting edge nearside, described cutting edge is exposed along the side of opening, described slit ends at blind end, described blind end is positioned at the far-end nearside of blade housing, the blind end of described slit limits the degree of advancing of described cutting element, wherein said cutting assembly also comprises the cutting window of adjustable dimension, the cutting window of described adjustable dimension limits by described opening and by the inner surface of a passage at least in part, described passage is formed at the fixed position place in blade housing and allows to pass the suture through, wherein the bottom of slit is crossing with the inner surface of described passage, wherein said cutting assembly reduces along with the size of cutting window when drive actuator and contacts with sutural due to sharp cutting edge, and cutting is received in the suture inside cutting window.

12. suture cutters according to claim 11, wherein said passage comprises longitudinal component and angled portion, described longitudinal component longitudinally runs and ends at the first aperture, and described angled portion forms certain angle with vane body width, and ends at the second aperture.

13. suture cutters according to claim 12, the far-end of wherein said longitudinal component and slit is isolated by wall.

14. suture cutters according to claim 12, wherein said first aperture is formed in the far-end of blade housing.

15. suture cutters according to claim 11, wherein said cutting element has flat shape, and described slit comprises longitudinal slit with flat shape.