CN205988285U - The head end of belt sensor has the magnetic orientation Circumferential catheter conduit of coiled spiral structure - Google Patents

Abstract

The utility model discloses a kind of head end of belt sensor has the magnetic orientation Circumferential catheter conduit of coiled spiral structure, technical problem to be solved is to reduce the X-ray exposure time that traditional cardiac electrophysiology mapping produces, decrease the use of contrast agent, and reduce the difficulty of doctor's identification.Controlled circle is fixedly connected with the distal tip of this utility model conduit, controlled circle includes controlled delineation shaped steel wire, controlled delineation shaped steel wire is the helical structure of in one plane at least one loop of spiral surrounding, helical structure is plate-like, controlled delineation shaped steel wire is disposed on the same plane with the axis of conduit, it is coated with controlled delineation shaped steel wire trocar sheath and electrode end pipe successively outside controlled delineation shaped steel wire, at least provided with a ring electrode on the circle body surface of electrode end pipe, it is provided with sensor in the near-end of controlled circle, in conduit, be provided with bracing wire.Compared with prior art, improve the collection ability of signal, clinically considerably increase effectiveness and the operability of operation, save operating time.

Description

The head end of belt sensor has the magnetic orientation Circumferential catheter of coiled spiral structure Conduit

Technical field

This utility model is related to a kind of medical surgical instrument, and particularly one kind is used for cardiac electrophysiology field, and cooperation is three-dimensional The head end of the belt sensor that Mapping System uses has the magnetic orientation Circumferential catheter conduit of coiled spiral structure.

Background technology

In recent years, three-dimensional mapping system is due to its unique safety, accuracy and high efficiency, now international, domestic faces Bed cardiac electrophysiology field is widely used to various complicated ARR mappings and catheter ablation.Cardiac three-dimensional mapping Largely change traditional cardiac electrophysiology method.For at present, traditional cardiac electrophysiology method is all by X-ray Imaging or contrast imaging obtain the structural information in human body, this method one increased patient for the X-ray exposure time, two Increased the usage amount of contrast agent, easily patient to be damaged, three, become image is two dimensional image, increased doctor The difficulty of identification, operation is very inconvenient.

For the problems referred to above, number of patent application is：201210370788.6, invention entitled with spiral electrode assembly Mapping catheter, this disclosure of the invention is a kind of to be suitable for mapping catheter used in heart chamber and has the far-end with spiral belt Mapping assembly, described spiral belt can be by means of dilator radial dilatation and contraction so that the electrode on described belt can be many Contact heart wall, this have the far-end mapping assembly with spiral belt, and this spiral belt is arranged on conduit at individual position simultaneously On same axis, and spiral belt is that this structure is not easy to contact with wall of the heart around forming along its axis direction, and And it is also easy to cause the problem of signal overlap.

Content of the invention

The purpose of this utility model is the magnetic orientation ring-type providing a kind of head end of belt sensor to have coiled spiral structure Mapping electrode catheter, technical problem to be solved is to reduce the X-ray exposure time that traditional cardiac electrophysiology mapping produces, and More accurate three-dimensional mapping 3-dimensional image can be formed within the shorter time, decrease the use of contrast agent, and reduce The difficulty of doctor's identification, in combination with positioning in the chambers of the heart for the conduit, makes the operation technique of doctor convenient a lot.

For solving the above problems, this utility model employs the following technical solutions realization：A kind of head end of belt sensor has The magnetic orientation Circumferential catheter conduit of coiled spiral structure, handle apparatus including the near-end and tool of far-end is resilient leads Pipe, is provided with adapter on the near-end of handle apparatus, the distal tip of described conduit is fixedly connected with controlled circle, controlled circle bag Include controlled delineation shaped steel wire, controlled delineation shaped steel wire is the helical structure of in one plane at least one loop of spiral surrounding, This helical structure is plate-like, and controlled delineation shaped steel wire is disposed on the same plane with the axis of conduit, in controlled delineation shaped steel wire Outside is coated with controlled delineation shaped steel wire trocar sheath and electrode end pipe successively, at least provided with one on the circle body surface of electrode end pipe Individual ring electrode, is connected with adapter through the wire in conduit, handle apparatus in the inner side of ring electrode, in the near-end of controlled circle Inside it is provided with sensor, the wire of sensor is connected with adapter through conduit and handle apparatus；It is provided with bracing wire in conduit, bracing wire The welding of fixing end termination, the near-end of bracing wire and the handle apparatus of the inner chamber through electrode end pipe for the distal tip and controlled delineation shaped steel wire Connect.

Controlled circle described in the utility model also include union joint on controlled delineation shaped steel wire movable end termination with And connect the changeover portion conduit of fixing end termination and the double-hole tube distal tip of controlled delineation shaped steel wire, the inner chamber of electrode end pipe with The inner chamber UNICOM of changeover portion conduit, sensor is in changeover portion conduit.

Conduit described in the utility model includes conduit pipe shaft located at handle apparatus far-end, located at conduit pipe shaft distal end Flexible double-hole tube on head, described double-hole tube has two tube chambers, the respectively first tube chamber, the second tube chamber, and changeover portion is led First tube chamber of the inner chamber of pipe and double-hole tube, the second tube chamber UNICOM；The inner side of ring electrode through located at double-hole tube the first tube chamber, lead Wire in pipe pipe shaft, handle apparatus is connected with adapter；Second tube chamber through double-hole tube for the distal tip of bracing wire, changeover portion are led Weld with the fixing end termination of controlled delineation shaped steel wire after the inner chamber of the inner chamber of pipe and electrode end pipe.

Ring electrode described in the utility model is disposed on the circle body of electrode end pipe.

The tube wall of conduit pipe shaft described in the utility model has been embedded in stainless steel cloth.

Handle apparatus described in the utility model include the handle casing with through hole, and through hole is arranged on handle casing axis On, threaded handle cover is provided with the distal tip of handle casing, the distal end Middle face of handle cover is provided with and through hole The handle cap bore of UNICOM, the far-end of described handle casing is provided with push rod, and the near-end of described push rod inserts in through hole from handle cap bore, One week raised handle is provided with push rod, push rod is divided into far-end bar portion, proximal stem portion, is provided with and passes through in push rod by handle Wear the push rod through hole of push rod far-end end face and proximal face, push rod through hole is arranged on the axis of push rod, conduit pipe shaft near End termination is fixed in the tube chamber of push rod through hole far-end；Guide groove is provided with the periphery wall of proximal stem portion, remote in handle casing Spacing post holes with through hole UNICOM is provided with guide groove position corresponding section on the perisporium at end, spacing post holes has female thread, in limit It is provided with, in the post holes of position, the spacing stud threadeded with it, the lower end of spacing stud is stretched in guide groove, and spacing stud is used for limiting The shift position of push rod；Threaded locking nut is cased with far-end bar portion；It is provided with handle in the near-end of described through hole Core, the axis of handle inner core is provided with inner core through hole, is provided with first connecting with inner core through hole on the periphery wall of handle inner core Fixation with steel wire post holes, the first fixation with steel wire post holes is provided with female thread, is provided with the second steel wire on the near-end perisporium of handle casing Fixing post hole, is provided with fixation with steel wire post, fixation with steel wire post and the first fixation with steel wire post holes screw thread are even in the second fixation with steel wire post holes Connect, be provided with after fixation with steel wire post is fully screwed in the second fixation with steel wire post holes with inner core through hole even in the lower end of fixation with steel wire post Logical steel wire locating dowel through hole, the proximal tips of described bracing wire are led to through push rod through hole, inner core through hole distal portions, steel wire locating dowel Behind hole and inner core through hole proximal part, turn fixation with steel wire post, so that steel wire locating dowel through hole is misplaced with inner core through hole, by bracing wire Fixing.

Pass through between the fixing end termination of the distal tip of bracing wire described in the utility model and controlled delineation shaped steel wire Riveting sealing of tube.

Riveting pipe surface described in the utility model coats riveting pipe-in-pipe.

A diameter of 0.8mm-1mm of sensor described in the utility model；Length is 8mm-12mm, and described sensor is electricity Magnetic Sensor；The maximum outside diameter of controlled circle is 10mm-25mm, and the spacing between two neighboring loop is 1mm-6mm；Controlled delineation Shaped steel wire is provided with the loop of more than two, and the steel wire diameter of controlled delineation shaped steel wire is 0.2mm-0.4mm, controlled delineation shaped steel Silk is made using the material with elastic shape memory；The lumen diameter of controlled delineation shaped steel wire trocar sheath is 0.3mm-0.5mm, External diameter is 0.5mm-0.7mm, and controlled delineation shaped steel wire trocar sheath adopts PEBAX, polyurethane, block polyamide or nylon material system Become；The internal diameter of ring electrode is 1.3mm-1.8mm, and external diameter is 1.35mm-1.85mm, and width is 1mm-2mm, and ring electrode adopts platinoiridita Alloy or gold are made；Electrode tip bore is 0.8mm-1.2mm, and external diameter is 1mm-2mm, and length is 90mm-110mm, electrode End pipe is made using PEBAX, polyurethane, block polyamide or nylon material；The external diameter of double-hole tube is 1.6mm-4mm, and length is 30mm-50mm, a diameter of 0.75mm-0.85mm of the first tube chamber of double-hole tube, a diameter of 0.6mm-0.7mm of the second tube chamber, Double-hole tube is made using PEBAX, polyurethane, block polyamide or nylon material；The external diameter of changeover portion conduit is 1.6mm-4mm, Internal diameter is 1mm-3mm, and length is 5mm-25mm, and changeover portion conduit is made using polyurethane, block polyamide or nylon material；Lead The internal diameter of pipe pipe shaft be 1mm-3mm, external diameter be 1.6mm-4mm, length be 1100mm-1300mm, conduit pipe shaft adopt polyurethane, Block polyamide or nylon material are made；The copper cash of a diameter of 0.1-0.2mm of wire.

Controlled delineation shaped steel wire described in the utility model is made using Nitinol.

This utility model compared with prior art, the sensor that is provided with distal end of catheter, it is possible to achieve conduit is determined Position, the controlled circle of the helical structure of at least one loop of in one plane spiral surrounding of distal end of catheter end, in controlled circle On be provided with multiple ring electrodes, it can improve the contact between conduit and heart, improves the collection ability of signal, by computer Three-dimensional cardiac Electrophysiological mapping technology directly quickly can carry out the three-dimensional imaging of the chambers of the heart to patient, completes three-dimensional modeling, Clinically considerably increase effectiveness and the operability of operation, save operating time.

Brief description

Fig. 1 is structural representation of the present utility model.

Fig. 2 is conduit pipe shaft of the present utility model structural representation after bending.

Fig. 3 is the structural representation of the controlled circle of this utility model.

Fig. 4 is this utility model electrode end pipe and the internal structure schematic diagram of double-hole tube.

Fig. 5 is the internal structure partial enlarged drawing of this utility model electrode end pipe and double-hole tube

Fig. 6 is the internal structure schematic diagram of this utility model union joint and electrode end pipe

Fig. 7 is the internal structure schematic diagram of this utility model handle apparatus.

Fig. 8 is the sectional view of this utility model conduit pipe shaft.

Specific embodiment

With reference to the accompanying drawings and examples this utility model is described in further detail.

As shown in figure 1, the magnetic orientation Circumferential catheter of the head end coiled spiral structure of belt sensor of the present utility model Conduit includes the handle apparatus 1 of near-end and the resilient conduit of tool 2 of far-end, and described conduit 2 is included located at handle apparatus 1 far-end Conduit pipe shaft 3, the flexible double-hole tube 4 with two tube chambers in conduit pipe shaft 3 distal tip, in double-hole tube 4 Distal tip is provided with controlled circle 5, and the tube chamber of double-hole tube 4 is respectively the first tube chamber 41, the second tube chamber 42, and conduit 2 can pass through handss Handle device 1 carries out adjustable bending to the double-hole tube 4 of distal end of catheter, and the near-end of conduit pipe shaft 3 is connected with the far-end of handle apparatus 1 Connect, adapter 6 is provided with the near-end of handle apparatus 1；Controlled circle 5 includes controlled delineation shaped steel wire 51, controlled delineation shaped steel wire 51 is the helical structure of in one plane at least one loop of spiral surrounding, and this helical structure is plate-like, controlled delineation shaped steel Silk 51 is disposed on the same plane with the axis of conduit 2, is coated with controlled delineation type outside controlled delineation shaped steel wire 51 successively Steel wire trocar sheath 56 and electrode end pipe 54, at least provided with a ring electrode 52 on the circle body surface of electrode end pipe 54, in ring electricity The inner side of pole 52 is connected with adapter 6 through the wire in the first tube chamber 41 of double-hole tube 4, conduit pipe shaft 3, handle apparatus 1, Described controlled delineation shaped steel wire 51 has the movable end located at distal medial and the fixing end located at proximal lateral, movable end it be Positioned at the helical structure center of the plate-like of controlled delineation shaped steel wire 51, and fixing end it be in controlled delineation shaped steel wire 51 At proximal end.

As shown in Figure 3 and Figure 4, controlled circle 5 also includes the movable end end of the distal medial located at controlled delineation shaped steel wire 51 Union joint 53 on head and the distal tip by the fixing end termination of the proximal lateral of controlled delineation shaped steel wire 51 and double-hole tube 4 The changeover portion conduit 55 connecting, the inner chamber UNICOM of the inner chamber of electrode end pipe 54 and changeover portion conduit 55, changeover portion conduit 55 interior The Liang Ge tube chamber UNICOM of chamber and double-hole tube 4, ring electrode 52 is provided with several, is respectively separated the circle body being arranged on electrode end pipe 54 On, the current potential of mapping so can be made more uniform, and the covering of ring electrode 52 is more comprehensively, for example, general normal ducts In heart, unit area can only cover 5 electrodes, and this utility model can cover 10 even more in equal unit area Many.

As shown in Figure 4 and Figure 5, it is provided with bracing wire 7 in conduit pipe shaft 3, bracing wire 7 Surface coating has bracing wire outer tube 71, main mesh Be to prevent wire and bracing wire from producing interference, the second tube chamber 42 through double-hole tube 4 of the distal tip of bracing wire 7, changeover portion conduit 55 Inner chamber and electrode end pipe 54 the near-end of inner chamber and controlled delineation shaped steel wire 51 the welding of fixing end termination, lead between the two Cross riveting pipe 8 to weld, riveting pipe 8 is coated by riveting pipe-in-pipe 81 located at changeover portion conduit 55 tube chamber bottom, riveting pipe 8 surface, prevents riveting Pipe 8 surface produces and contacts with wire, sensor 9, and the near-end of bracing wire 7 is connected with handle shape 1.It is provided with biography in changeover portion conduit 55 Sensor 9, the wire of sensor 9 is through changeover portion conduit 55, the first tube chamber 41 of double-hole tube 4, conduit pipe shaft 3 and handle apparatus 1 It is connected with adapter 6.

As shown in fig. 6, union joint 53 and electrode end pipe 54 pass through the hierarchic structure on union joint 53 near-end and electrode end pipe The 54 tight grafting of far-end is connected, and is provided with the work that union joint cavity supplies the distal medial of controlled delineation shaped steel wire 51 in union joint 53 Moved end termination is stretched into, and the movable end termination of controlled delineation shaped steel wire 51 distal medial polishes smooth process, prevents from damaging union joint Internal.

As shown in fig. 7, handle apparatus 1 include the handle casing 11 with through hole 12, through hole 12 is arranged on handle casing 11 On axis, threaded handle cover 13, the distal end Middle face of handle cover 13 are provided with the distal tip of handle casing 11 It is provided with the handle cap bore 14 with through hole 12 UNICOM, the far-end of described handle casing 11 is provided with push rod 15, the near-end of described push rod 15 Insert in through hole 12 from handle cap bore 14, one week raised handle 151 is provided with push rod 15, push rod 15 is split by handle 151 For far-end bar portion 152, proximal stem portion 153, it is provided with push rod 15 and runs through pushing away of push rod 15 far-end end face and proximal face Rod through-hole 154, push rod through hole 154 is arranged on the axis of push rod 15, and the proximal tips of conduit pipe shaft 3 are fixed on push rod through hole In the tube chamber of 154 far-ends；Guide groove 155 is provided with the periphery wall of proximal stem portion 153, on the perisporium of the far-end of handle casing 11 It is provided with the spacing post holes 111 with through hole 12 UNICOM with guide groove 155 position corresponding section, spacing post holes 111 has female thread, in limit It is provided with, in the post holes 111 of position, the spacing stud 16 threadeded with it, the lower end of spacing stud 16 is stretched in guide groove 155, spacing spiral shell Post 16 is used for limiting the shift position of push rod 15；Threaded locking nut 17 is cased with far-end bar portion 152；Described logical It is provided with handle inner core 18, the axis of handle inner core 18 is provided with inner core through hole 181 in the near-end in hole 12, outer in handle inner core 18 Perisporium is provided with the first fixation with steel wire post holes 182 connecting with inner core through hole 181, and the first fixation with steel wire post holes 182 is provided with interior Screw thread, is provided with the second fixation with steel wire post holes 112 on the near-end perisporium of handle casing 11, sets in the second fixation with steel wire post holes 112 There is fixation with steel wire post 19, fixation with steel wire post 19 is threadeded with the first fixation with steel wire post holes 182, in the lower end of fixation with steel wire post 19 It is provided with the steel wire positioning connecting after fixation with steel wire post 19 is fully screwed in the second fixation with steel wire post holes 112 with inner core through hole 181 Post through hole 191, the proximal tips of described bracing wire 7 are through push rod through hole 154, inner core through hole 181 distal portions, steel wire locating dowel through hole 191 and inner core through hole 181 proximal part after, turn fixation with steel wire post 19, make steel wire locating dowel through hole 191 and inner core through hole 181 dislocation, bracing wire 7 is fixing.

When promoting push rod 15, the degree of crook (shown in Fig. 2) of scalable double-hole tube 4, the bending direction of this double-hole tube 4 is edge Controlled circle 1 place plane is bent downwardly.Its cardinal principle is as follows：

Bracing wire steel wire 7 passes through the second tube chamber 42 of double-hole tube 4 due to being the eccentric orfice deviateing conduit 2 axle center, when bracing wire steel After the head end of silk 7 and riveting pipe 8 are connected, after tail end and handle inner core 18 are connected, the length of bracing wire 7 Tensile in conduit Degree is fixing.When promoting push rod 15, because double-hole tube 4 can bend, therefore the thrust of push rod 15 will be led to Crossing bracing wire 7 forces double-hole tube 4 to eccentric curving, by controlling the offset of the second tube chamber 42 of double-hole tube, goes to realize The degree of crook of double-hole tube.

As shown in figure 8, the tube wall in conduit pipe shaft 3 has been embedded in stainless steel cloth 31.

A diameter of 0.8mm-1mm of sensor 9 of the present utility model；Length is 8mm-12mm, preferred electromagnetic sensor；Can The maximum outside diameter of control circle 5 is 10mm-25mm, and the spacing between two neighboring loop is 1mm-6mm；Controlled delineation shaped steel wire 51 is excellent Elect the loop of more than two as, the steel wire diameter of controlled delineation shaped steel wire 51 is 0.2mm-0.4mm, remembers using having resilient shapes The material recalled, preferably Nitinol；The lumen diameter of controlled delineation shaped steel wire trocar sheath 56 is 0.3mm-0.5mm, and external diameter is 0.5mm-0.7mm, material is PEBAX, polyurethane, block polyamide or nylon material.The internal diameter of ring electrode 52 is 1.3mm- 1.8mm, external diameter is 1.35mm-1.85mm, and width is 1mm-2mm, and the making material of ring electrode 52 is preferably platinumiridio or Huang Gold；Electrode end pipe 54 internal diameter is 0.8mm-1.2mm, and external diameter is 1mm-2mm, and length is 90mm-110mm, using PEBAX, poly- ammonia Ester, block polyamide or nylon material；The external diameter of double-hole tube 4 is 1.6mm-4mm, and external diameter is preferably 2mm-3mm, and length is 30mm-50mm, the length of double-hole tube 4 can determine the length of double-hole tube 4, diplopore according to the shape of the helical buckling of controlled circle 5 A diameter of 0.75mm to 0.85mm of the first tube chamber of pipe 4, a diameter of 0.6mm-0.7mm of the second tube chamber, using PEBAX, gather Urethane, block polyamide or nylon material；The external diameter of changeover portion conduit 55 is 1.6mm-4mm, and external diameter is preferably 2mm-3mm, interior Footpath is 1mm-3mm, preferably 1mm-2mm, and length is 5mm-25mm, preferably 10mm-20mm, the making material of changeover portion conduit 55 It is polyurethane, block polyamide or nylon；The internal diameter of conduit pipe shaft 3 is 1mm-3mm, and internal diameter is preferably 2mm-3mm, and external diameter is 1.6mm-4mm, external diameter is preferably 2mm-3mm, and length is 1100mm-1300mm, the making material of conduit pipe shaft 3 is polyurethane, Block polyamide or nylon；The copper cash of a diameter of 0.1-0.2mm of wire.

Using method of the present utility model：The head end of belt sensor had the magnetic orientation ring-type mapping of coiled spiral structure Electrode catheter pushes in the heart chambers of the heart from femoral artery, controls double-hole tube 4 bending to make on the controlled circle of far-end 5 by handle apparatus 1 The ring electrode 52 in face and chambers of the heart inwall recline, and obtain each point position information, feed back to three-dimensional mapping system modelling.This utility model Compared with prior art, head end has the controlled circle of the in one plane helical structure of at least one loop of spiral surrounding, above Have multiple ring electrodes 52, inside changeover portion conduit 55, be placed with sensor 9, three-dimensional mapping system can be coordinated quickly to realize the heart The mapping of dirty 3 D anatomy structure and modeling, and realize catheter positioning and navigation.

This utility model increases mapping area and the signals collecting quantity of each catheter manipulation on the basis of existing technology, And so that the current potential of mapping is more uniform on traditional assignment test method, cover more comprehensive, conduit such as of the present utility model Increased the mapping of inner ring, the distal end of catheter termination of prior art is individual pen circulus, compared with existing circulus, this Utility model has more loops to go to place ring electrode, thus reaching the purpose of mapping.Secondly, this in one plane spiral The design of the helical structure of the plate-like of cincture, can preferably contact the inwall of heart, and cannot be easily caused the overlap of signal, And operate the method for mapping catheter similar with traditional operation, it is easily understood.The increase of the mapping current potential of operation every time, modeling Data just in further detail, considerably increases the accuracy of modeling, simultaneously it is also possible to reduce the number of times of doctor's operation, saves operation Time；From the point of view of the helical structure of conduit header terminal design, compared with conventional circular structure, increase the contact with wall of the heart for the conduit Area, meanwhile, helical structure can make the more uniform, because standoff distance is all between ring electrode of the Potential distribution of conduit mapping It is uniform.Secondly, in one plane the helical structure of spiral surrounding can help conduit preferably to receive in operation process Enter sheath, and reduce the resistance between conduit and sheath, facilitate operation technique, make operation more safe and efficient.

Claims (10)

1. a kind of head end of belt sensor has the magnetic orientation Circumferential catheter conduit of coiled spiral structure, including the handss of near-end The resilient conduit of the tool (2) of handle device (1) and far-end, is provided with adapter (6), its feature on the near-end of handle apparatus (1) It is：Controlled circle (5) is fixedly connected with the distal tip of described conduit (2), controlled circle (5) includes controlled delineation shaped steel wire (51), controlled delineation shaped steel wire (51) is the helical structure of in one plane at least one loop of spiral surrounding, and this spiral is tied Structure is plate-like, and controlled delineation shaped steel wire (51) is disposed on the same plane with the axis of conduit (2), in controlled delineation shaped steel wire (51) outside is coated with controlled delineation shaped steel wire trocar sheath (56) and electrode end pipe (54), successively in the circle body of electrode end pipe (54) At least provided with a ring electrode (52) on surface, in the inner side of ring electrode (52) through in conduit (2), handle apparatus (1) Wire is connected with adapter (6), is provided with sensor (9), the wire of sensor (9) is through conduit (2) in the near-end of controlled circle (5) And handle apparatus (1) are connected with adapter (6)；It is provided with bracing wire (7), the distal tip of bracing wire (7) is through electrode tip in conduit (2) The inner chamber of pipe (54) is welded with the fixing end termination of controlled delineation shaped steel wire (51), and the near-end of bracing wire (7) is with handle apparatus (1) even Connect.

2. the head end of belt sensor according to claim 1 has the magnetic orientation Circumferential catheter of coiled spiral structure and leads Pipe it is characterised in that：Described controlled circle (5) also includes the union joint on controlled delineation shaped steel wire (51) movable end termination (53) and connect controlled delineation shaped steel wire (51) fixing end termination and double-hole tube (4) distal tip changeover portion conduit (55), the inner chamber UNICOM of the inner chamber of electrode end pipe (54) and changeover portion conduit (55), sensor (9) is located at changeover portion conduit (55) Interior.

3. the head end of belt sensor according to claim 2 has the magnetic orientation Circumferential catheter of coiled spiral structure and leads Pipe it is characterised in that：Described conduit (2) includes conduit pipe shaft (3) located at handle apparatus (1) far-end, located at conduit pipe shaft (3) Flexible double-hole tube (4) in distal tip, described double-hole tube (4) has two tube chambers, the respectively first tube chamber (41), First tube chamber (41) of two tube chambers (42), the inner chamber of changeover portion conduit (55) and double-hole tube (4), the second tube chamber (42) UNICOM；Ring The inner side of electrode (52) is through the wire in first tube chamber (41) of double-hole tube (4), conduit pipe shaft (3), handle apparatus (1) It is connected with adapter (6)；Second tube chamber (42) through double-hole tube (4) for the distal tip of bracing wire (7), changeover portion conduit (55) interior Weld with the fixing end termination of controlled delineation shaped steel wire (51) after the inner chamber of chamber and electrode end pipe (54).

4. the head end of the belt sensor according to claims 1 to 3 any one has the magnetic orientation ring of coiled spiral structure Shape mapping electrode catheter it is characterised in that：Described ring electrode (52) is disposed on the circle body of electrode end pipe (54).

5. the head end of belt sensor according to claim 4 has the magnetic orientation Circumferential catheter of coiled spiral structure and leads Pipe it is characterised in that：The tube wall of described conduit pipe shaft (3) has been embedded in stainless steel cloth (31).

6. the head end of belt sensor according to claim 5 has the magnetic orientation Circumferential catheter of coiled spiral structure and leads Pipe it is characterised in that：Described handle apparatus (1) include the handle casing (11) with through hole (12), and through hole (12) is arranged on handss On handle shell (11) axis, threaded handle cover (13), handle cover are provided with the distal tip of handle casing (11) (13) distal end Middle face is provided with the handle cap bore (14) with through hole (12) UNICOM, and the far-end of described handle casing (11) is provided with Push rod (15), the near-end of described push rod (15), in handle cap bore (14) insertion through hole (12), is provided with one week on push rod (15) Raised handle (151), push rod (15) is divided into far-end bar portion (152), proximal stem portion (153) by handle (151), in push rod (15) the push rod through hole (154) being provided with and running through push rod (15) far-end end face and proximal face, push rod through hole (154) is arranged On the axis of push rod (15), the proximal tips of conduit pipe shaft (3) are fixed in the tube chamber of push rod through hole (154) far-end；Near The periphery wall in side pole portion (153) is provided with guide groove (155), with guide groove (155) position on the perisporium of the far-end of handle casing (11) Put corresponding section to be provided with and the spacing post holes (111) of through hole (12) UNICOM, spacing post holes (111) has female thread, in limited post It is provided with the spacing stud (16) threadeded with it, the lower end of spacing stud (16) is stretched in guide groove (155), limit in hole (111) Position stud (16) is used for limiting the shift position of push rod (15)；Far-end bar portion (152) is cased with threaded locking nut (17)；It is provided with handle inner core (18), the axis of handle inner core (18) is provided with inner core through hole in the near-end of described through hole (12) (181), the first fixation with steel wire post holes being connected with inner core through hole (181) is provided with the periphery wall of handle inner core (18) (182), the first fixation with steel wire post holes (182) is provided with female thread, is provided with the second steel on the near-end perisporium of handle casing (11) Silk fixing post hole (112), is provided with fixation with steel wire post (19) in the second fixation with steel wire post holes (112), fixation with steel wire post (19) and the One fixation with steel wire post holes (182) is threaded, the lower end of fixation with steel wire post (19) be provided with when fixation with steel wire post (19) completely stubborn Enter steel wire locating dowel through hole (191) connecting after in the second fixation with steel wire post holes (112), described bracing wire with inner core through hole (181) (7) proximal tips are through push rod through hole (154), inner core through hole (181) distal portions, steel wire locating dowel through hole (191) and interior After core through hole (181) proximal part, turn fixation with steel wire post (19), make steel wire locating dowel through hole (191) and inner core through hole (181) Dislocation, bracing wire (7) is fixing.

7. the head end of belt sensor according to claim 6 has the magnetic orientation Circumferential catheter of coiled spiral structure and leads Pipe it is characterised in that：Pass through between the distal tip of described bracing wire (7) and the fixing end termination of controlled delineation shaped steel wire (51) Riveting pipe (8) welds.

8. the head end of belt sensor according to claim 7 has the magnetic orientation Circumferential catheter of coiled spiral structure and leads Pipe it is characterised in that：Described riveting pipe (8) Surface coating has riveting pipe-in-pipe (81).

9. the head end of belt sensor according to claim 8 has the magnetic orientation Circumferential catheter of coiled spiral structure and leads Pipe it is characterised in that：A diameter of 0.8mm-1mm of described sensor (9)；Length is 8mm-12mm, and described sensor (9) is electricity Magnetic Sensor；The maximum outside diameter of controlled circle (5) is 10mm-25mm, and the spacing between two neighboring loop is 1mm-6mm；Controlled Delineation shaped steel wire (51) is provided with the loop of more than two, and the steel wire diameter of controlled delineation shaped steel wire (51) is 0.2mm-0.4mm, can Control delineation shaped steel wire (51) is made using the material with elastic shape memory；The tube chamber of controlled delineation shaped steel wire trocar sheath (56) Internal diameter be 0.3mm-0.5mm, external diameter be 0.5mm-0.7mm, controlled delineation shaped steel wire trocar sheath (56) adopt PEBAX, polyurethane, Block polyamide or nylon material are made；The internal diameter of ring electrode (52) is 1.3mm-1.8mm, and external diameter is 1.35mm-1.85mm, wide Spend for 1mm-2mm, ring electrode (52) is made using platinumiridio or gold；Electrode end pipe (54) internal diameter is 0.8mm-1.2mm, outward Footpath is 1mm-2mm, and length is 90mm-110mm, and electrode end pipe (54) adopts PEBAX, polyurethane, block polyamide or nylon material Material is made；The external diameter of double-hole tube (4) be 1.6mm-4mm, length be 30mm-50mm, the first tube chamber of double-hole tube (4) a diameter of 0.75mm-0.85mm, a diameter of 0.6mm-0.7mm of the second tube chamber, double-hole tube (4) adopts PEBAX, polyurethane, block polyamides Amine or nylon material are made；The external diameter of changeover portion conduit (55) is 1.6mm-4mm, and internal diameter is 1mm-3mm, and length is 5mm- 25mm, changeover portion conduit (55) is made using polyurethane, block polyamide or nylon material；The internal diameter of conduit pipe shaft (3) is 1mm-3mm, external diameter is 1.6mm-4mm, and length is 1100mm-1300mm, and conduit pipe shaft (3) adopts polyurethane, block polyamide Or nylon material makes；The copper cash of a diameter of 0.1-0.2mm of wire.

10. the head end of belt sensor according to claim 9 has the magnetic orientation Circumferential catheter of coiled spiral structure Conduit it is characterised in that：Described controlled delineation shaped steel wire (51) is made using Nitinol.