CN103877660A

CN103877660A - Adjustable bent sheath

Info

Publication number: CN103877660A
Application number: CN201410099311.8A
Authority: CN
Inventors: 张庭超; 陈奕龙; 符伟国
Original assignee: Lifetech Scientific Shenzhen Co Ltd
Current assignee: Lifetech Scientific Shenzhen Co Ltd
Priority date: 2012-02-10
Filing date: 2012-02-10
Publication date: 2014-06-25

Abstract

The invention discloses an adjustable bent sheath. The adjustable bent sheath comprises a sheath body, a traction wire and a handle, wherein the traction wire can slide in the sheath body and the handle, the sheath body is provided with a near end and a far end, the near end of the sheath body is connected with the handle, the handle comprises a branch, the branch is located on one side close to the near end of the sheath body and is provided with a movable component capable of horizontally moving along the branch, the near end of the traction wire is fixed to the movable component, the far end of the traction wire is fixed to the far end of the sheath body, an elastic section is arranged close to the far end of the sheath body, the bending angle of the elastic section is changed when the movable component horizontally moves on the branch, and the movable component is in threaded connection with the branch. Compared with the prior art, the adjustable bent sheath has the advantages that the effective length of the handle is decreased, the accuracy of angle control is improved, and the operation process is convenient and can be controlled easily.

Description

Adjustable bending sheath tube

Technical field

The present invention relates to medical sheath Manifold technology field, be specifically related to a kind of far-end adjustable bending sheath tube, for the intervention diagnosis and treatment operation of human body Wicresoft, set up passage, import or derive medical instruments, medicine or body fluid.

Background technology

At present, getting involved class diagnosis and treatment sheath pipe has been widely used in human body interventional programs, conventionally need to set up by the intervention class diagnosis and treatment sheath pipe of various different structures, shape, size the passage of diseased region and external operation end in patient body, to import various medical instrumentss, medicine or the implantation instrument diseased region to sufferer, or derive the body fluid of diseased region etc., reach and avoid using surgical operation can arrive the object of diseased region.Sheath pipe is made up of body and handle, and body is longer, and has an inner chamber as passage, and body has far-end and near-end, and far-end can conveniently enter body lumen (as blood vessel), and near-end operates for operator for connecting handle.For example: guiding catheter, delivery sheath, guiding sheath pipe etc.

In use, the far-end of sheath pipe is generally first inserted in blood vessel, then continues to insert body and makes far-end arrive precalculated position (as diseased region), and medicine, body fluid or apparatus etc. pass through from the inner chamber of sheath pipe.The intracavity diameter of body is easier delivery instrument and medicine, and the external diameter of body is less less to the wound of body lumen.Operation technique person generally need to, under the guiding of X-ray machine, deliver to precalculated position to the operation of handle by the far-end of sheath pipe by external.Due to the full of twists and turns characteristic of the pipeline in human body with externally often bring larger difficulty to operation under remote operated impact in body, and the range of application that makes Wicresoft get involved sheath Manifold technology is restricted.Therefore, preferably sheath pipe design should possess simultaneously: good guidance quality, turn round control property, enough axially and the maximization of radial support power and internal diameter and outer diameter ratio be thin-walled property.

In addition, in the Design and manufacturing process of sheath pipe, understand according to the difference of sheath pipe desired use, and sheath pipe far-end preformed is formed to different curved shapes, the anatomy form of itself and specific diseased region is adapted, be convenient to sheath pipe far-end and in human body, aim at this diseased region.In recent years, the pre-moulding intervention class diagnosis and treatment sheath pipe of the far-end of various shapes and angle is developed successively, and is devoted to use clinically.The warehouse of this institute of will seeking medical advice must be got all the shape and the specification of all sheath pipes ready, has increased undoubtedly stock model and the quantity of hospital, has increased the use cost of hospital.

But, even if develop the pre-moulding intervention class diagnosis and treatment sheath pipe of the far-end of various shapes and angle, in clinical use, also frequently there is following situation: in the time that the situation of individuation difference appears in Human Physiology anatomical structure, even the pre-moulding sheath pipe of the far-end designing according to specific Human Physiology anatomical structure, also cannot adapt to one by one with the dissect physiology structure of individuation, and then affect surgical effect.In the time there is problems in operation process; doctor can withdraw from sheath pipe and again select the pre-moulding sheath pipe of other shape conventionally, so, has increased undoubtedly the expense that sufferer is born; also increase the probability that the lumen organization of sufferer sustains damage, even can extend patient's raying time.

In addition, at operative site, sometimes also need the dissect physiology structure according to sufferer, by sheath pipe far-end by heat treated mode, again the required general shape of moulding one-tenth, but this is not the operation skill that each doctor can grasp, and this moulding operation meeting again causes damage to sheath pipe, such as fractureing, inner chamber loss etc.In addition, sheath pipe need to just can accurately arrive diseased region by the help of seal wire and dilator conventionally, and seal wire is because its soft characteristic can more easily enter into diseased region; The dilator that is moulded in advance definite shape inserts the inner chamber of body, and sheath pipe and dilator be when seal wire advances and arrive diseased region, can be subject to the positive action of seal wire and points to target position.But after dilator and seal wire are extracted out from sheath pipe, sheath pipe far-end cannot keep pre-moulding shape, and made the far-end of sheath pipe depart from target position.In this process, first sheath pipe can give torsion of seal wire, and the sheath pipe after seal wire is withdrawn from there will be a bounce, and above-mentioned two kinds of active forces all can cause damage to target position tissue around.

Based on above-mentioned condition, develop at present sheath pipe far-end adjustable bending technology, can make sheath pipe far-end changing repeatedly between different angles by external adjustment operation, to be adapted to different Physiological Anatomy forms.

The handle of adjustable bending sheath tube of the prior art has different features.The adjustable bending sheath tube that document US6945956 introduces has the handle of Y type bifurcated, as shown in Figure 1, wherein, adjustable bending sheath tube has the handle of Y type bifurcated, this handle comprises main 82 and side shoot 79, traction fiber 78 wears out from the sidewall that approaches near-end of body 77, the near-end of traction fiber 78 passes handle side shoot 79 and is connected with lock control slide block 80, pull or loosen drawing silk 78 by lock control slide block 80 just to change the curved shape of sheath pipe far-end stretch section 76, but must directly control lock control slide block 80 with hands.Because handle can not enter human body, body 77 inserts that segment length of handle and must stay beyond human body, therefore imports the also corresponding length of necessary prolongation of apparatus of human body from body 77.The master of Y-shaped handle props up 82 does not need to provide the position of holding, and has therefore shortened that segment length that body 77 inserts handle (the shortest can to 2cm left and right), is conducive to the shorter apparatus of coupling.

The adjustable bending sheath tube of introducing in document US7678074 has straight shape handle, as shown in Figure 2, wherein, adjustable bending sheath tube has straight shape handle, traction fiber 55 extracts and is fixed on a lock control devices that can slide from the sidewall that approaches near-end of body 51, this lock control devices comprises trigger 52, fixed block 57, lower tooth piece 59 and shell fragment 58, tooth bar 56 interlocks on lower tooth piece 59 and handle.Press trigger 52 and separate with tooth bar 56 to promote lower tooth piece 59, at this moment can before and after slip trigger 52, whole lock control devices can be along the moving axially of body 51, tractive or loosen traction fiber 55 and realize and adjust curved function.If unclamp trigger 52, shell fragment 58 is upspring lower tooth piece 59, tooth bar 56 interlocks of lower tooth piece 59 and handle, and lock control devices is fixed on the precalculated position of handle, thereby has locked the angle of sheath pipe far-end, facilitates doctor to carry out other operation technique.

Document US7402151 has described another kind of far-end adjustable bending sheath tube, and its handle adopts leverage to carry out tractive traction fiber, thereby makes the far-end of sheath pipe adjust curved.

Adjustable bending sheath tube of the prior art is all the variations that realize far-end angle of bend by the operation of handle.Most of length of body need insert human vas or other pipelines could arrive preposition, operator must come tubular form in monitoring human at any time and position to ensure safety and effect by radioscopy, if the inconvenient operation of adjustable bending sheath tube or accurate not, can extend patient and be exposed to the time in X ray, increase patient and operator's risk.There is following defect in above-mentioned adjustable bending sheath tube of the prior art:

The handle of the adjustable bending sheath tube in document US6945956 lacks station location marker and self-locking device, operator on one side regulating handle observes the variation of body far-end angle on one side under X ray, so that body far-end points to target position, and the pulling force that must keep traction fiber stablizes constantly, could keep the tune bending angle of sheath pipe far-end constant.The pulling force of traction fiber generally can, up to 40N, directly pull and just be difficult to steadily control with hands, affects the accurate location of sheath pipe far-end.Because handle can not accurate adjustment angle can not lock angle, the pulling force of traction fiber changes a little, adjust bending angle will larger variation occur, operator needs carefully firmly could keep angle constant all the time, import or derive other apparatuses or medicine is just very inconvenient, certainly will extend the x-ray irradiation time.

For the adjustable bending sheath tube described in document US7678074, although having auto-lock function, handle adjusts bending angle with stationary remote, but straight shape decreased food must long (being at least 10cm), just can be suitable for stable button and the slip lock control devices of holding and remain enough length and install convenient operation, and long straight shape handle is unfavorable for that coupling carries shorter apparatus.In addition, because the tooth pitch of the ratcheting mechanism in handle causes differentially, the angle of bend of body far-end can not regulate continuously, moves to adjacent teeth from teeth, will cause the saltatory of body far-end angle of bend to change, and is not easy to operation.The pulling force of traction fiber generally can, up to 40N, press the button on one side and also want movable button to pull traction fiber with finger, and this multidirectional operation is very difficult steady control also, affects the accurate location of sheath pipe far-end.After sheath pipe enters in body, due to the roundabout pipeline of bending, in the process of advancing or after arriving diseased region, may need body curved distal to different directions, that just needs axial torsion handle.Although the button positions of handle can be pointed out the camber angle of sheath pipe far-end, but button is positioned at a side of handle, once handle forwards the one side that hinders operator's sight line to, be not easy to judge sheath pipe far-end angle of bend by observing handle, must open radioscopy could judge, now operator's the finger distance that also inconvenient control knob moves.

In addition, the adjustable bending sheath tube of available technology adopting lever handle, contributes to the stability of operation although reduced hand pulling force, be difficult to accurately control the angle of body far-end, the angle of bend that can not tentatively judge by observing handle sheath pipe far-end, can extend the x-ray irradiation time.

Known by above-mentioned analysis, adjustable bending sheath tube of the prior art is adjusting firmly inhomogeneous when angle, and seriality and accuracy are bad; Adjust curved inconvenient operation, be unfavorable for observing and calibrating the tune turn of bilge part of handle; For the adjustable bending sheath tube of straight shape handle, straight shape handle is oversize, is not suitable for carrying shorter apparatus.

Summary of the invention

Main purpose of the present invention is to provide a kind of far-end adjustable bending sheath tube, is ensureing that handle has under the prerequisite of the little effective length of trying one's best, and improves the degree of accuracy of sheath pipe far-end angle of bend control, makes the convenient easily control of operating process, to improve the safety of operation.

In order to achieve the above object, the present invention proposes a kind of adjustable bending sheath tube, comprise body, traction fiber and handle, described traction fiber can slide in described body and described handle, described body has near-end and far-end, the near-end of described body is connected with described handle, described handle comprises a branch, described branch is positioned near the side of near-end of described body, described branch is provided with one can be along the movable part of this branch's translation, the near-end of described traction fiber is fixed on described movable part, and the far-end of described traction fiber is fixed on the far-end of described body; Near the far-end of described body, have a stretch section, described movable part changes the angle of bend of described stretch section when translation in described branch, between described movable part and described branch, is threaded connection.

Preferably, described movable part keeps self-locking state when without External Force Acting; While movement, remove self-locking state under external force drives.

Preferably, described movable part is lock control slide block, and the one-sided or bilateral of described lock control slide block has teeth; Described branch comprises lateral brace and is enclosed within on described lateral brace and the free to rotate cylinder that revolves, and described lateral brace is provided with the guide groove along its axis, described in being placed in, described lock control slide block revolves in cylinder and described guide groove, and can be along described guide groove translation; The described inwall that revolves cylinder is provided with the spiral teeth groove mating with the teeth of described lock control slide block.

Preferably, described guide groove has a pair of smooth sidewall, and described lock control slide block has a pair of smooth side, the pair of sidewalls of described guide groove respectively with a pair of smooth contacts side surfaces of described lock control slide block, described lock control slide block can slide in described guide groove.

At least a portion of revolving cylinder preferably, is that transparent material is made.

Preferably, the root of described lateral brace is provided with a stopping means, described in revolve cylinder internal diameter be less than the maximum gauge of described stopping means.

Preferably, described movable part is the mobile cylinder that revolves, and the inwall that cylinder is revolved in described movement is provided with screw thread, and described movement is revolved cylinder and had afterbody; Described in described handle, branch into screw rod, described screw rod mates with the screw thread that cylinder is revolved in described movement, and described movement is revolved jacket casing on described screw rod; Described screw rod is provided with line chamber, and the near-end of described traction fiber passes described line chamber and be fixed on described movement the afterbody that revolves cylinder.

Preferably, the center that the afterbody of cylinder is revolved in described movement is provided with the pin that can freely rotate, and the near-end of described traction fiber is fixed on described pin.

Preferably, comprise the free to rotate cylinder that revolves if described movable part is lock control slide block and described branch, revolve cylinder described in and be provided with the scale of the position that is used to indicate described lock control slide block; If described movable part for mobile revolve cylinder and described in branch into screw rod, described screw rod is provided with and is used to indicate described movement and revolves the scale of the position of cylinder.

Preferably, if being lock control slide block and described branch, described movable part comprises the free to rotate cylinder that revolves,, revolve the inner diameter D of cylinder and the pitch d of screw thread on it and meet and be related to d< π μ D, wherein μ be described lock control slide block and described in revolve the coefficient of maximum static friction of the contact surface between cylinder; If described movable part for mobile revolve cylinder and described in branch into screw rod, described movement is revolved the inner diameter D of cylinder and the pitch d of screw thread on it and is met and be related to d< π μ D, and wherein μ is the coefficient of maximum static friction that the contact surface between cylinder is revolved in described screw rod and described movement.

A kind of adjustable bending sheath tube that the present invention proposes, the operating grip of sheath pipe adopts bifurcation structure, can shorten to greatest extent decreased food, ensure the suitability of adjustable bending sheath tube and other apparatuses, and can carry more other apparatuses of big-length scope, and be more suitable for grasping operation than Y-shaped handle of the prior art, meet ergonomics requirement, on handle, be provided with the movable part for regulating sheath pipe far-end angle of bend, utilize inclined-plane static friction principle, movable part is connected with traction fiber, the short distance rectilinear motion of traction fiber is converted to the continuous big angle rotary of easy control, screw-threaded engagement between other parts of movable part and handle has realized auto-lock function, automatically lock at any time the angle of bend of body far-end, even if the pulling force of traction fiber is very large, the cylinder that revolves on turning handle gets final product release gently, not needing to carry out any additional operations can freely change between locking and release two states, can body shake or angle of bend not suddenlyd change because of exerting oneself excessive, and the angle that regulates or lock can continuously and smoothly change, convenient operation person carries the operation of other apparatus or medicine, improve the convenient and levels of precision of operation, in addition, the present invention further adopts transparent material to make the cylinder that revolves of handle, adopt the eye-catching material of color to make the lock control slide block of handle, and can on tube outer surface, identify the visual scale of omnidirectional revolving, the distance that instruction lock control slide block moves, in order to conveniently to judge the relative size of the angle of bend of the far-end stretch section of body, even if do not open X ray, no matter the coil on handle is rotated great angle, operator easily observes distance that lock control slide block moves to infer the general curved angle of sheath pipe far-end stretch section, reduce patient and the open-assembly time of doctor in X ray, harm reduction.

Therefore, compared to existing technology, adjustable bending sheath tube of the present invention can shorten handle effective length, improve the degree of accuracy of angle control and make the convenient easily control of operating process.

Brief description of the drawings

Fig. 1 is the schematic diagram of a kind of adjustable bending sheath tube of the prior art;

Fig. 2 is the sectional structure chart of the straight shape handle of another kind of adjustable bending sheath tube of the prior art;

Fig. 3 is the body schematic diagram of the adjustable bending sheath tube of first embodiment of the invention;

Fig. 4 is the schematic diagram of the far-end of the body shown in Fig. 3 when bending;

Fig. 5 is the schematic diagram of the adjustable bending sheath tube of first embodiment of the invention;

Fig. 6 is the schematic diagram after the far-end bending of the adjustable bending sheath tube shown in Fig. 5;

Fig. 7 is the assembling decomposing schematic representation of the adjustable bending sheath tube shown in Fig. 5;

Fig. 8 is the handle arrangement schematic diagram of the adjustable bending sheath tube shown in Fig. 5;

Fig. 9 is the generalized section of the lateral brace of the handle shown in Fig. 8;

Figure 10 is the generalized section of the breeches joint of the handle shown in Fig. 8;

Figure 11 is breeches joint and the lock control slide block assembling schematic diagram of the handle shown in Fig. 8;

Figure 12 is the handle scale schematic diagram of the adjustable bending sheath tube shown in Fig. 5 in the time of original state;

Figure 13 is the handle scale schematic diagram of the far-end bent angle of the adjustable bending sheath tube shown in Fig. 5 while reaching 60 °;

Figure 14 is that the far-end of the adjustable bending sheath tube shown in Fig. 5 curves the handle scale schematic diagram when U-shaped;

Figure 15 is the schematic diagram of the adjustable bending sheath tube of second embodiment of the invention;

Figure 16 is that the handle of the adjustable bending sheath tube shown in Figure 15 is in the generalized section of original state;

Figure 17 is that the handle of the adjustable bending sheath tube shown in Figure 15 is in the generalized section of the curved state of tune.

In order to make technical scheme of the present invention clearer, clear, be described in further detail below in conjunction with accompanying drawing.

Detailed description of the invention

The solution of the embodiment of the present invention is mainly: the handle of adjustable bending sheath tube adopts bifurcation structure, in the branch of handle, arrange and there is with this branch the movable part being threaded, can shorten to greatest extent the effective length (along the longitudinal length of body) of handle, and can improve the degree of accuracy of sheath pipe far-end angle of bend control, make the convenient easily control of operating process by auto-lock function.

A kind of adjustable bending sheath tube that the present invention proposes, comprise body, traction fiber and handle, body has near-end and far-end, the near-end of body is connected with handle, and handle comprises a branch, and this branch is positioned at a side of body, body is provided with the filament chamber for wearing traction fiber, branch is provided with one can be along the movable part of this branch's translation, and the near-end of traction fiber is fixed on movable part, and the far-end of traction fiber is fixed on the far-end of body; The far-end of body has a stretch section, and movable part can change the angle of bend of stretch section when translation in branch, wherein, between movable part and branch, is threaded connection.And movable part keeps self-locking state in the time not being subject to External Force Acting; While movement, can remove self-locking state under external force drives.

Particularly, please refer to shown in Fig. 1～Figure 14, it is a kind of adjustable bending sheath tube that first embodiment of the invention proposes, and the movable part in the present embodiment is lock control slide block 18, and the adjustable bending sheath tube in the present embodiment comprises body 1, traction fiber 4 and handle 8.Body 1 is mainly made with macromolecular material, and in prior art, existing its manufacture method and dimensional requirement, do not repeat them here.

As shown in Figure 3, the original state of body 1 is long straight tube.Near the far-end 2 of the body of described body 1, having within the scope of certain radian can free bend and the stretch section 5 of Active recovery original state.It between the near-end 3 of stretch section 5 and body, is long and harder hard section 7.The far-end 2 of described body is provided with a head 6 with smooth contour, the damage with the far-end 2 that reduces body to body lumen.Body 1 comprises at least one delivery lumen and at least one traction fiber tract.Delivery lumen extends through the near-end 3 of body continuously from the far-end 2 of body.Traction fiber 4 passes traction fiber tract and is embedded in the middle of the tube wall of body 1, and at least one anchor 31 is embedded near in the tube wall of head 6, and the far-end of traction fiber 4 is fixed on described anchor 31, and the near-end of traction fiber 4 extracts near the sidewalls near-end 3 of body.Near the near-end 3 of body, firmly strain traction fiber 4, realize the function of stretch section 5 bending within the scope of certain angle, as shown in Figure 4.If cancel the pulling force to traction fiber 4, stretch section 5 will return to the straight shape original state shown in Fig. 3 under the elastic effect of plastics self.

Handle 8 comprises breeches joint 9, revolves cylinder 12, end cap 14 and T connector 10, as shown in Figure 5.Optionally, T connector 10 is connected with flexible pipe 15 and three-way valve 16, at the near-end of T connector 10, a ring cowling 11 is set, can be by syringe or other apparatus connecting tee valves 16 to filling liquid or extracting bodily fluid in the delivery lumen of body 1.The bent angle that cylinder 12 can drive traction fiber 4 and change stretch section 5 is revolved in manipulation, as shown in Figure 6.

Breeches joint 9 has one for the long tube chamber of 1～2cm of body 1 is installed, extend the approximately lateral brace 24 of 5～10cm and diameter 0.5～1cm of length from a side of breeches joint 9, between the axis of the tube chamber of breeches joint 9 and the axis of lateral brace 24, have the angle of 10 °～70 °.Along the axis of lateral brace 24, the approximately guide groove 22 of 0.2～0.5cm of a width is set, preferably the length of guide groove 22 accounts for 30%～90% of lateral brace 24 length, and guide groove 22 preferably penetrates the relative both sides of lateral brace 24 and forms long and narrow frame shape.Lock control slide block 18 is placed in this 22 guide groove, and can be along guide groove 22 translations.

Tube chamber, lateral brace 24 and the guide groove 22 of described breeches joint 9 can single injection-molded, as shown in Figure 7.Wherein, the branch of the handle 8 of the present embodiment mainly 12 is made up of above-mentioned lateral brace 24 and the cylinder that revolves that is enclosed within on this lateral brace 24, and revolves between cylinder 12 and lock control slide block 18 and is threaded connection.

Revolve cylinder 12 and be one than guide groove 22 slightly long or isometric cylinders, it can be enclosed within and on lateral brace 24, freely rotates and guide groove 22 is sealed.Be fixed with an end cap 14 at the end of lateral brace 24, prevent from revolving cylinder 12 and depart from lateral brace 24, revolve freely rotating of cylinder 12 but do not hinder.Be embedded in one end of the traction fiber 4 in body 1 from the sidewall of body 1 passes, be connected with lock control slide block 18.As shown in Figure 9, lock control slide block 18 is installed in guide groove 22, and lock control slide block 18 surfaces have teeth 25.The inwall that revolves cylinder 12 is provided with the spiral teeth groove 26 mating with the teeth 25 of lock control slide block 18, lock control slide block 18 does straight reciprocating motion by cylinder 12 drivings of revolving of rotating, pull the traction fiber 4 being connected with lock control slide block 18, the angle of bend of the stretch section 5 of body 1 is changed.

Preferably, revolve cylinder 12 and adopt transparent materials to make, such as transparent plastics such as PC, PS, PET, can see through and revolve cylinder and 12 see lateral brace 24, and ensure can see through from different directions and revolve cylinder 12 and see the lock control slide block 18 revolving in cylinder 12.

Can adopt dyeing, injection molding or machining mode, make scale 17(such as point, line or other symbol at the transparent side surface that revolves cylinder 12), be used to indicate the position of lock control slide block 18 in guide groove 22.In order to observe from different directions scale 17, each scale 17 is preferably with the circle-shaped side surface that revolves cylinder 12 that is distributed in.

Preferably, when scale 17 with the pitch of teeth groove 26 of revolving cylinder 12 at once, lock control slide block 18 moves a scale 17, revolves cylinder 12 and just revolves and turn around, and makes more convenient operation.Alternatively, pitch is the integral multiple of the spacing of scale 17, the distance that can observe more accurately lock control slide block 18 move.

Lock control slide block 18 can use metal (as rustless steel) or macromolecular material to make.The color of lock control slide block 18 differs from the color of lateral brace 24.Preferably, lateral brace 24 use light color (as white or light blue) materials are made; Lock control slide block 18 uses the material of color dark (as redness, black or navy blue) to be made, and the plastics (POM, PA, ABS etc.) that preferably hardness is higher, adopt machining or the molding of injection molding mode.

T connector 10 is about 1～2cm, has the longitudinal inner chamber for docking body 1.Optionally, cross connection flexible pipe 15 on the intracavity sidewall of T connector 10, described longitudinal inner chamber forms three way type with flexible pipe 15 and is connected.Body 1 in Fig. 7, breeches joint 9 and T connector 10 can fit together by the following method, the near-end of body 3 is expanded into horn mouth 19, described tube chamber by the far-end of body 2 through breeches joint 9, make the tube chamber near-end of breeches joint 9 entangle horn mouth 19, then the far-end of T connector 10 is pressed into the tube chamber near-end of breeches joint 9, the conical surface 20 of T connector 10 far-ends compresses the inner surface of horn mouth 19, producing thrust is fixed on body 1 on breeches joint 9, make the delivery lumen of body 1 dock and be communicated with the inner chamber of T connector 10, play the effect of the anti-side leakage of sealing simultaneously.The intracavity diameter of T connector 10 is preferably consistent with the diameter of the delivery lumen of body 1, is convenient to passing through of apparatus or medicine.Optionally, the porose ring cowling 11 in middle part is fixed on the near-end of T connector 10, for example: ring cowling 11 by buckle or be threaded, and clamps silica gel pad 21 with T connector 10 between the two, silica gel pad 21 only seals up the near-end of the inner chamber of T connector 10.But there is crack the centre of silica gel pad 21 is conventionally kept closed, the dilator coordinating with adjustable bending sheath tube or other apparatuses can enter into through the crack of ring cowling 11 and silica gel pad 21 delivery lumen of body 1, in the time that dilator or other apparatuses are withdrawn from body 1 and silica gel pad 21, silica gel pad 21 plays the effect of sealing because self elasticity can return to original closure state.

Fig. 8 is the partial sectional view of breeches joint 9, wherein, the root of lateral brace 24 has one substantially along the axial line hole 29 of lateral brace 24, the tube chamber of breeches joint 9 is communicated with the one end in line hole 29, the other end in line hole 29 leads to guide

groove

22, and 4 of traction fibers that pass from the sidewall of body 1 can lead to cable-through hole 29 and enter guide groove 22 and be fixed on lock control slide block 18 again.When mounted, before one end of traction fiber 4 is connected with lock control slide block 18, first body 1 is inserted to the tube chamber of breeches joint 9, then make traction fiber 4 wear cable-through hole 29.

As shown in Figure 9, its section is along the axis of lateral brace 24 and through whole guide groove 22 for lateral brace 24 and the local vertical section of revolving cylinder 12.As shown in Figure 9 and Figure 10, lateral brace 24 is the sidewall of guide groove 22 substantially, within lock control slide block 18 is positioned at and revolves cylinder 12 and guide groove 22.Fixing hole 23, teeth 25 and pin 28 are set respectively on the not ipsilateral of lock control slide block 18.Traction fiber 4 inserts fixing hole 23 and contacts with pin 28, by pin 28, one end of traction fiber 4 and lock control slide block 18 is fixed.The fixed form of pin 28 can be that screw thread or its are equal to replacement, can bear the maximum pull of traction fiber 4.Fixing hole 23 preferably faces line hole 29 so that traction fiber 4 inserts, pin 28 preferably perpendicular to fixing hole 23 so that fixed traction silk 4.Revolve on cylinder 12 inwall and have spiral teeth groove 26, described teeth 25 are mated with teeth groove 26, rotate to revolve 12, cylinder and can drive lock control slide block 18 to do straight reciprocating motion, thereby lock control slide block 18 pull the angle of bend of traction fiber 4 change stretch sections 5.

Preferably cuboid of lock control slide block 18, the side of its pair of parallel respectively with the sidewall contact of guide groove 22, the side of its another pair of parallel arranges respectively teeth 25, and therefore lock control slide block 18 can and revolve the cylinder 12 orbital direction smooth sliding that jointly limit and can not rotate along guide groove 22.Guide groove 22 also can only have a side opening, now the bottom of guide groove 22 keeps smooth with the bottom (without teeth) of lock control slide block 18 and contacts, only teeth 25 are set at the top of lock control slide block 18 (one-sided) and mate with teeth groove 26, but, teeth 25 stress balances of aforesaid bilateral setting and be more conducive to the steady movement of lock control slide block 18.In addition, at the root of lateral brace 24, a stopping means can be set, this stopping means can be position-arresting disk 27, the internal diameter that revolves cylinder 12 is less than the maximum gauge of position-arresting disk 27, rotation is revolved cylinder at 12 o'clock, and position-arresting disk 27 is held and revolved the pulling force of cylinder 12 with opposing traction fiber 4, ensures to revolve steadily rotating freely of cylinder 12.

On the other hand, the original shape of body 1 is generally that nature is straight, now traction fiber 4 can not relax and only have faint pulling force, a little firmly pull traction fiber 4 just to start to change near the bent angle of the stretch section 5 far-end 2 of body, this can realize by the pilot hole 30 on pin 28 and lateral brace 24.When lock control slide block 18 is in one end of guide groove 22 and when the most close position-arresting disk 27, just can pin 28 be installed suitably to set the original state of traction fiber 4 by pilot hole 30, as shown in the section of the breeches joint 9 of Figure 10, see as shown in figure 11 from the front of pilot hole 30.In fixed traction silk 4, lock control slide block 18 should the most close position-arresting disk 27, then traction fiber 4 is inserted in fixing hole 23, slightly firmly pull traction fiber 4 to keep the natural its straight state of body 1 on one side simultaneously, use small instruments and tools (as screwdriver), through pilot hole 30, pin 28 fixed traction silk 4, now the pulling force minimum of traction fiber 4 are installed on one side.

Preferably, teeth groove 26 extends to continuously and revolves cylinder 12 two ends, and guide groove 22 extends to the position of position-arresting disk 27, and the lock control slide block 18 installing is also pasting position-arresting disk 27, now lateral brace 24 can directly insert and revolve in cylinder 12, makes the teeth 25 of lock control slide block 18 directly embed the entrance of teeth groove 26.Before position-arresting disk 27 props up and revolves cylinder 12, lock control slide block 18 can not contact teeth groove 26, just can not hinder the movement of revolving cylinder 12 opposite side pillars 24 yet, after installation as shown in figure 12.

Operator only needs to revolve cylinder 12, now teeth groove 26 keeps interlock with the teeth 25 of lock control slide block 18, moving axially of cylinder 12 revolved on lock control slide block 18 edge under the restriction of guide groove 22, limited dish 27 and end cap 14 limit respectively to revolve cylinder 12 two ends, teeth groove 26 is along with revolving that cylinder 12 rotates but cannot be along revolving cylinder 12 axial translation, that is to say, along revolving cylinder 12 axis translations, teeth groove 26 rotates around revolving cylinder 12 axis teeth 25, teeth 25 with respect to teeth groove 26 spin shape slide, the pitch d that revolves cylinder 12 inner diameter D and teeth groove 26 has determined teeth groove 26(and has revolved cylinder 12) rotational angle and teeth 25(and lock control slide block 18) synchronized relation between translational movement.When revolving cylinder 12 while doing forward rotation, lock control slide block 18 is shifted to end cap 14 from position-arresting disk 27, and the pulling force in traction fiber 4 increases, and forces the bent angle of stretch section 5 to increase.It is far away that lock control slide block 18 leaves position-arresting disk 27, and the bent angle of stretch section 5 is larger.When revolving cylinder 12 while rotating backward, lock control slide block 18 returns to position-arresting disk 27, and the pulling force in traction fiber 4 reduces, and due to the elastic-restoring force of stretch section 5, the bent angle of stretch section 5 reduces.Lock control slide block 18 is got back to position-arresting disk 27, and stretch section 5 recovers initial naturalness automatically.

According to known bevel friction statics Analysis, for the coefficient of maximum static friction μ between teeth 25 and teeth groove 26, meet physical relation formula as long as revolve the inner diameter D of cylinder 12 and the pitch d of teeth groove 26: d< π μ D, the pulling force in traction fiber 4 can make to keep static friction state between teeth 25 and teeth groove 26, now, revolve cylinder 12 and all static balances of lock control slide block 18, Here it is self-locking state.In the time that the far-end 2 of body bends to required state, operator can directly unclamp revolves cylinder 12, and near far-end 2 bent angles of body remain unchanged, do not need other auxiliary movement just can realize auto-lock function, this is convenient to doctor and operates other supporting apparatus simultaneously very much.Rotate and revolve cylinder 12 when external force, break the static friction balance between teeth 25 and teeth groove 26, just can change near the bent angle of far-end 2 of body.Be not subject to the cylinder that revolves of external force 12 to have at an arbitrary position auto-lock function, and rotate and revolve cylinder 12 and just can remove at any time self-locking, this brings very large facility to operation technique.

Revolve each scale 17 position for corresponding lock control slide block 18 respectively on cylinder 12, therefore near the angle of bend of the stretch section 5 far-end 2 of scale 17 and body forms certain corresponding relation, thereby can roughly judge near the tune bending angle of the stretch section 5 far-end 2 of body by revolving scale 17 on cylinder 12.Preferably, when the stretch section 5 of body 1 has original shape, lock control slide block 18 is positioned at the initial point of scale 17, just produces faint tension force in traction fiber 4.When the degree of crook of stretch section 5 is adjusted to proper states, write down the now scale 17 of lock control slide block 18 correspondences, just can continue to adjust sheath pipe, as long as position and the shape invariance of the other parts of sheath pipe, lock control slide block 18 is moved back to the scale 17 of originally writing down, just can make the degree of crook of stretch section 5 get back to proper states later.

The preferable range of pitch d is 0.5～5mm.If when body 1 is long or its internal diameter is larger, or when the bent angle excursion of stretch section 5 is very large, can select relatively large pitch d, revolving like this cylinder 12 does not just need to rotate the too many number of turns, then selects suitable to revolve an inner diameter D to meet the requirement of static friction.If body 1 is shorter or its internal diameter hour, or the bent angle excursion of stretch section 5 hour, can select relatively little pitch d and revolve an inner diameter D, to improve the controllable precision of bent angle, at this moment, judge that by revolving cylinder 12 number of turns that turn over the tune bending angle of stretch section 5 can be more convenient.

For example, when the internal diameter of body 1 is that 3mm and length are 1000mm, when stretch section 5 length are 50mm, selecting pitch d is 2mm, make lock control slide block 18 move about 6mm with respect to the initial value of scale 17, revolve cylinder 12 and rotate approximately three circles from initial position, the far-end 2 of body is with respect to 60 ° of body 1 deflections, as shown in figure 13.If lock control slide block 18 moves about 10mm with respect to the initial value of scale 17, revolve cylinder 12 and rotate approximately five circles from initial position, the far-end 2 of body becomes 0 ° with the angle of body 1, and bent angle has changed 180 °, and stretch section 5 bends to U-shaped, as shown in figure 14.Like this, can give clear and definite indication information of operator, facilitate operation technique, also reduce X-radiation harm.Near the far-end 2 of body is positioned to target area in human body time, operator rotates revolves cylinder 12 and observes the scale 17 of rotating cycle or lock control slide block 18 correspondences, do not need to open the far-end 2 of the body in radioscopy human body, just the far-end of body 2 can be adjusted to the position with X ray check and correction in advance.

The present embodiment has following beneficial effect: the operating grip 8 of adjustable bending sheath tube adopts bifurcation structure, can shorten to greatest extent the effective length of handle 8, ensure the suitability of adjustable bending sheath tube and other apparatuses, be more suitable for carrying some other shorter apparatuses than straight shape handle, and be more suitable for grasping operation than Y-shaped handle of the prior art, meet ergonomics requirement, on handle 8, be provided with for the lock control slide block 18 of the angle of bend of adjustable elastic section 5 and revolve cylinder 12, the short distance rectilinear motion of traction fiber 4 is converted to the easily continuous big angle rotary of control of any finger, can not only significantly reduce manually operated exerting oneself, and there is the auto-lock function of angular adjustment, particularly, utilize inclined-plane static friction principle, lock control slide block 18 is connected with traction fiber 4, lock control slide block 18 and the screw-threaded engagement of revolving between cylinder 12 realize this auto-lock function, automatically lock at any time the angle of bend of stretch section 5, even if the pulling force of traction fiber 4 is very large, rotate gently and revolve cylinder and 12 get final product release, not needing to carry out any additional operations can freely change between locking and release two states, can not make body 1 shake or make the angle of bend sudden change of stretch section 5 because of exerting oneself excessive, and the angle of bend of the stretch section 5 that regulates or lock can continuously and smoothly change, convenient operation person carries the operation of other apparatus or medicine, improve the convenient and levels of precision of operation, in addition, the present embodiment further adopt transparent material make handle 8 revolve cylinder 12, adopt the eye-catching material of color to make the lock control slide block 18 of handle 8, and can identify the distance that the visual scale of omnidirectional 17 moves with instruction lock control slide block 18 on 12 outer surfaces revolving cylinder, in order to the relative size of the convenient angle of bend that judges stretch section 5, even if do not open X ray, no matter which direction handle 8 is rotated to, operator easily observes distance that lock control slide block 18 moves to infer the general curved angle of stretch section 5, reduce patient and the open-assembly time of doctor in X ray, harm reduction.

Please refer to shown in Figure 15～Figure 17, a kind of adjustable bending sheath tube that second embodiment of the invention proposes, the movable part in the present embodiment is the mobile cylinder 35 that revolves, and this moves and revolves cylinder 35 and have afterbody, and in the present embodiment, the critical piece of the branch of handle 8 is screw rod 37.

The present embodiment and above-mentioned the first embodiment are substantially similar, and main difference part is the structure of its handle 8.In the present embodiment, a side of breeches joint 34 is screw rods 37, screw thread is set to be enclosed within on screw rod 37 at the mobile inwall that revolves cylinder 35, when mobile revolving just moved vertically when cylinder 35 rotates and made body 1 bending, as shown in figure 15.Tighten traction fiber 4 to drive body 1 bending in order to make the mobile cylinder 35 that revolves, along the axis of screw rod 37, a line chamber 32 is set, the near-end of traction fiber 4 is through line chamber 32 and be fixed on mobile bottom of revolving cylinder 35, mobilely revolves cylinder 35 and screw rod 37 in the vertical section of original position as shown in figure 16.

Preferably, the mobile afterbody that revolves cylinder 35 has a bottom surface, a pin 33 free to rotate is set at the center of described bottom surface, the near-end of traction fiber 4 is fixed on pin 33, so not only be convenient to assembling, revolve that cylinder 35 rotates and near-end and the pin 33 of traction fiber 4 do not rotate when mobile, can also avoid traction fiber 4 to be reversed under hightension very and twist disconnected.

Preferably, remove the sub-fraction screw thread of screw rod 37 sides, form the smooth and long and narrow scale plane 36 shown in Figure 16, start to mark a series of scales 17 from position-arresting disk 27 vertically, be used to indicate the mobile apical position that revolves cylinder 35.

Preferably, can multiple identical scale planes 36 be set at the axisymmetric position of screw rod 37, to all see from different directions scale 17, also not affect the mobile cylinder 35 that revolves simultaneously and coordinate with the stable of screw rod 37.

If need to strengthen the bent angle of body 1, need firmly to pull traction fiber 4, cylinder 35 is revolved in namely movement will be away from position-arresting disk 27, the scale 17 coming out can show the mobile bent angle that revolves the apical position of cylinder 35 and can be used for inferring body 1, therefore the mobile cylinder 35 that revolves needn't be by transparent material, as shown in figure 17.

Adjust the orientation of body 1 if operator need to reverse handle 8, owing to all observing from multiple directions scale 17 and the mobile translation distance that revolves cylinder 35, therefore can be convenient to judge the angle of bend of stretch section 5.

It should be noted that the theory and design requirement that the teeth 25 of the lock control slide block 18 in aforementioned the first embodiment adopt is also applicable to the teeth 25 on screw rod 37.By the static friction between the teeth 25 on screw rod 37 and the mobile teeth groove 26 that revolves cylinder 35 inwalls, realize and mobilely revolve the self-locking of cylinder 35 and keep the bent angle of body 1 constant, more slightly firmly rotate and can remove again self-locking state.When mobile while revolving cylinder 35 toward revolution, due to the elastic restoring force of body 1, traction fiber 4 is also toward rollback, and adjustable bending sheath tube is can auto back straight.

Compared with prior art, the adjustable bending sheath tube of the embodiment of the present invention is realized multiple technologies effect simultaneously: shorten handle 8 effective length, improve the degree of accuracy of angle control and make the convenient easily control of operating process.It is specific as follows,

The first, because the traction adjustment mechanism of the handle 8 of Y type is by the oblique side that is placed in body 1, with respect to straight shape handle, the longitudinal component of the handle 8 of Y type can be very short, so the assistive device that adjustable bending sheath tube of the present invention can be carried can have larger length range;

Second, handle 8 has utilized inclined-plane static friction principle, movable part is connected with traction fiber 4, screw-threaded engagement between other parts on movable part and handle 8 has realized auto-lock function, automatically lock at any time near the angle of bend of the stretch section 5 far-end 2 of body, even if the pulling force of traction fiber 4 is very large, rotate gently and revolve cylinder 12 or the mobile cylinder 35 that revolves gets final product release, not needing to carry out any additional operations can freely change between locking and this two states of release, can body 1 not shaken or the angle of bend sudden change of stretch section 5 because of exerting oneself excessive, and the angle that regulates or lock can continuously and smoothly change, convenient operation person carries the operation of other apparatus or medicine, improve the convenient and levels of precision of operation,

The 3rd, in the branch of handle 8, be provided with scale 17, even reverse handle 8 towards, all easily observe from different directions physical location and the displacement of movable part, to infer near the angle of bend of the stretch section 5 far-end 2 of body when the temporary close X ray, reduce patient and the open-assembly time of doctor in X ray, harm reduction.

The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or flow process conversion that utilizes description of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.

Claims

1. an adjustable bending sheath tube, comprise body, traction fiber and hands handle, described traction fiber can slide in described body and described handle, described body has near-end and far-end, the near-end of described body is connected with described handle, described handle adopts bifurcation structure, described handle comprises a branch, described branch is connected with the handle remainder except branch, described branch is positioned near the side of near-end of described body, described branch is provided with one can be along the movable part of this branch's translation, the near-end of described traction fiber is fixed on described movable part, the far-end of described traction fiber is fixed on the far-end of described body, near the far-end of described body, have a stretch section, described movable part changes the angle of bend of described stretch section when translation in described branch, it is characterized in that, between described movable part and described branch, is threaded connection.

2. adjustable bending sheath tube according to claim 1, is characterized in that, described movable part keeps self-locking state when without External Force Acting; While movement, remove self-locking state under external force drives.

3. adjustable bending sheath tube according to claim 1, is characterized in that, described movable part is the mobile cylinder that revolves, and the inwall that cylinder is revolved in described movement is provided with screw thread, and described movement is revolved cylinder and had afterbody; Described in described handle, branch into screw rod, described screw rod mates with the screw thread that cylinder is revolved in described movement, and described movement is revolved jacket casing on described screw rod; Described screw rod is provided with line chamber, and the near-end of described traction fiber passes described line chamber and be fixed on described movement the afterbody that revolves cylinder.

4. adjustable bending sheath tube according to claim 3, is characterized in that, the center that the afterbody of cylinder is revolved in described movement is provided with the pin that can freely rotate, and the near-end of described traction fiber is fixed on described pin.

5. according to the adjustable bending sheath tube described in claim 3 or 4, it is characterized in that, described screw rod is provided with the scale of position that is used to indicate described movement and revolves cylinder.

6. according to the adjustable bending sheath tube described in any one in claim 3 or 4, it is characterized in that, described movement is revolved the inner diameter D of cylinder and the pitch d of screw thread on it and is met and be related to d< π μ D, and wherein μ is the coefficient of maximum static friction that the contact surface between cylinder is revolved in described screw rod and described movement.