CN201303995Y

CN201303995Y - Intracavity bracket transporting system with preset front sacculus

Info

Publication number: CN201303995Y
Application number: CNU2008200515135U
Authority: CN
Inventors: 王于; 向贤宏
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-31
Filing date: 2008-07-31
Publication date: 2009-09-09
Anticipated expiration: 2018-07-31

Abstract

The utility model belongs to the field of medical appliance, wherein, a sacculus is in an integrated design, i.e. a bracket. The sacculus is arranged on the far end of the bracket, which is arranged on an inner core and is separated from the bracket, however, the sacculus is end to end with the bracket; the near end and the far end of the sacculus are respectively provided with radiopaque heavy metal marks. The bracket is arranged on the near end of the sacculus and is arranged in the clearance between the inner core and an outer sleeve; the near end of the outer sleeve is provided with a safety lock; the outer sleeve is dropped back corresponding to the inner core, then the safety lock is unlocked, the inner core is fixed and the outer sleeve is dropped back, so that the bracket is released. In the intracavity support transporting system with preset front sacculus, the sacculus is capable of expanding the aimed lesion before releasing the bracket; the inner core is anchored during the process of releasing the bracket; and the bracket can be expended further after releasing the bracket. By adopting the intracavity support transporting system with preset front sacculus, the bracket can be imbedded easily, thus saving the medical expenses, shortening the operation time and decreasing the complicating disease. The sacculus is capable of anchoring the inner core of the transporting system during the operation, so that the bracket is released exactly.

Description

The intracavity stent conveying system of pre-implanting saccule at front end

Technical field

The invention belongs to medical instruments field, particularly a kind of intracavity stent conveying system of pre-implanting saccule at front end.

Background technology

European scholar Gruntzig invention catheter with double-cavity saccule began from 1974, Percutaneous Transluminal Angioplasty, promptly adopt the angiostenosis due to microcatheter technology expansion or logical again atherosclerosis or other reason or the method for occlusive pathological changes, very fast medical institutions in some advanced technology countries are used for clinical one after another, and obtained the effect that makes medical circle attract attention, become the first-selected treatment means of angiostenosis-occlusive pathological changes.Subsequently, many scholars have carried out many researchs with regard to material, configuration, the structure of conduit and sacculus and have improved, and with its from the application extension of vascular system to non-vascular system.

Along with the increase of case, the maturation of empirical accumulation and intracavity sacculus forming technique, vascular and non-vascular balloon dilatation expose some drawbacks aspect curative effect, wherein high the most outstanding with the incidence rate of postoperative restenosis.The incidence rate of restenosis becomes the impassable obstacle of intracavity sacculus plasty due to the high intracavity sacculus plasty, has also influenced it and has deeply used further.Under above-mentioned background, in the eighties in 20th century middle and late stage several new techniques such as laser angioplasty, tremulous pulse medicated porridge sample material excision and vascular and non-vascular stent forming art have appearred successively, through clinical practice, vascular and non-vascular stent forming art become current main intracavity forming operation.

Along with extensive, the extensive application of intracavity stent, expose its many weak points again:

1. have any problem during the accurate location of support in dispose procedure, for the operator who is lacking in experience, for with inserting of the inserting of biliary tract rack in bigger position of respiratory movement amplitude such as the liver, airway stent etc., for ill-matched patient such as child, old man or coma patient etc., unit for the X line camera installation that high quality graphic can't be provided, support usually can't discharge accurately, and this means sorry and malpractice for the operator, then means disaster for the patient.

2. foley's tube and support packing, the outside of one its support casing of class foley's tube at sacculus arranged at present, balloon inflation before support discharges, support is expanded to a sizing value and attaches in the tube chamber, this system can't an actor's rendering of an operatic tune before support discharges in balloon expandable, support discharges the nonelastic tension force in back, fully by elasticity of blood vessels retraction force fixed support, need in the art to exchange sacculus and support repeatedly with exchange guidewire, increased operating time, the dosage of increased the doctor, suffering from contact with X-ray, medical expense correspondingly reach with the operation complications associated with arterial system also to be increased.

Summary of the invention

The purpose of the intracavity stent conveying system of described pre-implanting saccule at front end is to overcome the deficiency of existing stent delivery system, provides a kind of and can accurately locate and the intracavity stent conveying system of sacculus-rack integral.

The intracavity stent conveying system of described pre-implanting saccule at front end improves existing stent delivery system; go up a design sacculus (2) at the inner core (1) of support front end; this sacculus is separated from one another but join end to end with support (3) on inner core, is positioned at long protecting tube (4).

Described sacculus is positioned at the head end of induction system inner core, with be opened on induction system inner core near-end side on unique the communicating of liquid injection pipe (5), there are two radiopaque heavy metal labellings at its far and near two ends or are called Marker (6), and this sacculus can be designed to different length and shape according to the different parts that support uses.Be placed on after the sacculus, and join end to end with sacculus, support is compressed in the lacuna of inner core and trocar sheath (7).Same, also there is radiopaque heavy metal labelling (6) at the far and near two ends of support, so that under perspective, accurately locate, the far-end of trocar sheath is concordant with the far-end of support, trocar sheath near-end side connects the liquid injection pipe (8) of a belt switch, in it when injecting normal saline or contrast agent, liquid only can be from the far-end of trocar sheath or support unobstructed outflow, the near-end of trocar sheath is a safety lock (9), and the outer sleeve pipe of the release of support is with respect to the recession of inner core, when discharging support, unclamp safety lock, fix inner core, return and remove trocar sheath, support can discharge fully.

The inner core of the intracavity stent conveying system of described pre-implanting saccule at front end is the inner chamber of hollow, its far-end is the tip of chap gradually, near-end is Rule adapter (10), and intracavity can be by the seal wire of corresponding specification, so that this stent delivery system is introduced in the body smoothly in this.

The liquid injection pipe (5) that the intracavity stent conveying system of described pre-implanting saccule at front end is positioned at inner core near-end belt switch only communicates with sacculus; The liquid injection pipe (8) that is positioned at the trocar sheath near-end only communicates with lacuna between the inner core with trocar sheath.

The stent delivery system of described pre-implanting saccule at front end comprises and is used for vascular system, air ducting system, gi system, biliary system, urethra system and through jugular vein liver interior door cavities venous shunt art support.In view of the particularity of coronary artery intracavity lesion, the present invention does not comprise the stent delivery system that is used for coronary angioplasty.

The present invention has following beneficial effect:

1. described support-sacculus integrated design, the sacculus that presets in the system and the specification of support are complementary, and it is more convenient that the operator is used, and can save medical expense, can shorten operating time, can reduce complication.Support-sacculus integrated, can avoid the exchange repeatedly of sacculus and support in the art, shorten the time of operation technique, shorten the doctor, suffer from the time of exposing, alleviate the injury of lonizing radiation to doctor, trouble both sides, reduce the consumption of contrast agent, reduce complication long because of the operating time and that the contrast agent consumption is too much relevant; Compare with the support and the sacculus of independent packing, induction system production cost of the present invention and transportation carrying cost reduce greatly, thereby have reduced medical expense; Comprise the sacculus and the support that are complementary in the induction system of the present invention simultaneously, make the expansion of support discharge more reliable, can avoid sacculus excessive expansion removing blood stasis pipe or form dissecting aneurysm, sacculus crossing the situation that small rack can't expand fully and taking place, only support be arranged in the time of also can avoiding the emergency treatment of part medical institutions and do not have the difficult situation of deposit sacculus.

Described pre-implanting saccule at front end can be in art the inner core of grappling induction system, in case support is accurately located, after the balloon inflation, the inner core of induction system just is difficult to displacement, because it is the object of reference of target lesion and support, the release of support also changes with regard to the change with patient posture not, so need not consider patient's breathing, cough, singultus, the influence of displacement factor such as speak in the support dispose procedure.Even also can operate calmly for child, old man, coma patient etc.

Description of drawings

First kind of structure chart of the intracavity stent conveying system of the described pre-implanting saccule at front end of Fig. 1, before stent delivery system discharged: sacculus was in closed condition, and support is in closure state, and support and sacculus outside are with protecting tube.

Second kind of structure chart of the intracavity stent conveying system of the described pre-implanting saccule at front end of Fig. 2, during stent delivery system discharged: the protecting tube outside the system removed, and sacculus is inflation, the outer sleeve portion recession, correspondingly, support also part discharges.

Application first sketch map of the intracavity stent conveying system of the described pre-implanting saccule at front end of Fig. 3 in biliary tract stenosis, narrow positions have been gone balloon expandable, and support accurately is positioned target lesion, i.e. narrow positions, and sacculus is inflation grappling inner core.

Use second sketch map of the intracavity stent conveying system of the described pre-implanting saccule at front end of Fig. 4 in biliary tract stenosis, support accurately is released to target lesion, narrow positions.

Use three sketch map of the intracavity stent conveying system of the described pre-implanting saccule at front end of Fig. 5 in biliary tract stenosis returns and to remove sacculus to support and discharge the position, and the balloon expandable part is the support of expansion not as yet.

Among the figure: 1.a-inner core 1.b back handle 2-sacculus 3-support 4-protective casing, 5-sacculus liquid injection pipe 6-sacculus or stent markers 7-trocar sheath 8-trocar sheath liquid injection pipe 9-safety lock 10-Rule adapter

The specific embodiment

1. from protective casing, take out the intracavity stent conveying system of pre-implanting saccule at front end of the present invention;

2. heparin saline washes the each several part of induction system, and it is no abnormal to check that sacculus and support have, and screws safety lock;

3. percutaneous is introduced seal wire through chamber puncture or through human body natural's pipeline as urethra, digestive tract, air flue or lacrimal passage etc., introduces the intracavity stent conveying system of described pre-implanting saccule at front end along seal wire, in target lesion, crosses narrow section according to radiography Place capsule before the art;

4. inject the intracavity sacculus plasty of contrast agent balloon inflation row routine from the sacculus liquid injection pipe, after sacculus liquid injection pipe pumpback contrast agent to sacculus recovery is linear structure, before push away described intracavity stent conveying system and make support be positioned at the narrow of an actor's rendering of an operatic tune sacculus plasty, sacculus has then been crossed narrow positions in normal tube chamber, re-injects the inner core of contrast agent balloon inflation grappling induction system in normal tube chamber from the sacculus liquid injection pipe;

5. further understand the scope of target lesion from trocar sheath liquid injection pipe injection of contrast medium, the contrast agent in the pumpback sacculus is wire as required, and the position of adjusting inner core discharges the position to ideal support, the inner core of balloon inflation grappling once again, as shown in Figure 3;

6. the safety lock of outwarding winding, back removing supporters trocar sheath discharges support, as shown in Figure 4;

7. contrast agent to the sacculus in the pumpback sacculus is linear recession sacculus to the expert support expansion of support, as shown in Figure 5, withdraw from the intracavity stent conveying system of described pre-implanting saccule at front end, radiography once more, understand target lesion and improve situation, go balloon dilatation or insert an other support in case of necessity once more.

Claims

1. the intracavity stent conveying system of a pre-implanting saccule at front end, it is characterized by: in this stent delivery system, sacculus and support are positioned on the same inner core, support is a self-expandable stent, sacculus can expansion cavity before support discharges in lesion region be narrow section, can the grappling inner core in support discharges, can expandable stent after support discharges.

2. the intracavity stent conveying system of a kind of pre-implanting saccule at front end according to claim 1; it is characterized in that: go up a design sacculus (2) at the inner core (1) of support front end; this sacculus is not the inboard that is positioned at support on inner core; but separated from one another but join end to end with support (3), be positioned at long protecting tube (4).

3. the intracavity stent conveying system of a kind of pre-implanting saccule at front end according to claim 1 and 2, it is characterized in that: sacculus is positioned at the head end that pushes the releasing device inner core, there is the radiopaque labelling of heavy metal its rear and front end or is called Marker (6), and this sacculus can be designed to different length and shape according to the different parts that support uses; Support is positioned at after the sacculus, and join end to end with sacculus, support is compressed in the lacuna between inner core and the trocar sheath (7), same, also there is heavy metal labelling (6) rear and front end of support, so that accurately locate under perspective, the front end of trocar sheath is concordant with the front end of support, trocar sheath tail end side connects the liquid injection pipe (8) of a belt switch, in it when injecting normal saline or contrast agent, liquid only can be from the front end of trocar sheath unobstructed outflow, the afterbody of trocar sheath has a safety lock (9), the outer sleeve pipe of the release of support is removed with respect to returning of inner core, when discharging support, unclamp safety lock, fix inner core, return and remove trocar sheath, support can discharge fully.

4. the intracavity stent conveying system of a kind of pre-implanting saccule at front end according to claim 1 and 2, it is characterized in that: the liquid injection pipe (5) that the described intracavity stent conveying system that presets sacculus is positioned at inner core rear end belt switch only communicates with sacculus; To be positioned at trocar sheath rear end liquid injection pipe (8) be trocar sheath with shelf layer only communicates with lacuna between the inner core.

5. the intracavity stent conveying system of a kind of pre-implanting saccule at front end according to claim 1 and 2 is characterized in that: the intracavity stent conveying system of described pre-implanting saccule at front end comprises and is used for vascular system, air ducting system, gi system, biliary system, urethra system and through the support of jugular vein liver interior door cavities venous shunt art; In view of the particularity of coronary artery intracavity lesion, the present invention does not comprise the stent delivery system that is used for coronary angioplasty.