Stent conveying deviceTechnical field
The present invention relates to technical field of medical instruments, refer to a kind of conveyer device of the shape memory support for interventional therapy especially.
Background technology
Current, the support that shape memory material makes, with its excellent shape retention properties and good biocompatibility, has been widely used in the arteria covering membrane supporter of intervene operation, tremulous pulse plugging device, aortic valve etc.Various support all sends into operative region by conveyer device; Conveyer device generally includes sheath pipe and inner core, and support is rolled between the sheath pipe of conveyer device far-end and inner core by compressed package, after support is admitted to operative region, recalls sheath pipe, and support self-expanding discharges, and makes it restore to the original state and is fixed on operative region.But, the conveyer device of current use can not according to the rate of release of the practical situation adjusting pole of operation and position when recalling, easy generation stent migration, if and be subjected to displacement in support dispose procedure and cannot support be regained, this situation gently then causes adverse reactions of patients, heavy then cause operative failure and jeopardize patient vitals.The support inner core of current use is for plastic material is through extruding or injection moulding gained, and itself hardness is very high, and flexural property is very poor, is unfavorable for support smoothly by lesion locations, and easy injured patients's blood vessel wall, cause bad sequela; If mishandling, also the complication such as patient's cerebral thrombosis can be caused.
Summary of the invention
The present invention is directed to the defect that existing stent conveying device exists, a kind of conveyer device of adjustable support rate of release is provided.
For achieving the above object, the technical solution used in the present invention is: a kind of stent conveying device, comprises handle and conduit, and conduit comprises inner core and the sheath pipe of socket, and the far-end of inner core coordinates with sheath pipe and is used for placing rack; Described handle comprises the housing of hollow tubular, is located at the regulating module of housing proximal end, and is located at the screw rod in housing; Regulating module is planetary gear structure, and comprise sun gear, external toothing and several rows star-wheel, wherein the near-end of external toothing and screw rod is fixed; The far-end of housing is connected with the near-end of described inner core; The near-end of described sheath pipe also connects the buckle structure that can be snapped at screw rod.Mobile sheath pipe, exposes the support installing section of inner core, packages sheath pipe after support compression being inserted; Buckle structure is snapped at screw rod, after the far-end of device to be conveyed enters operative region location, rotates regulating module and sheath pipe can be made to withdraw, releasing bracket, it withdraws speed and regulates by rotation external toothing or sun gear, and external toothing realizes coarse adjustment, and sun gear can realize fine adjustment; In dispose procedure, if support has displacement, can regulating module be reversely rotated, support be regained, reorientates.
The sidewall of described housing of the present invention is provided with chute along the conduction orientation of described screw rod, and described buckle structure is the buckle stretching out chute, and the bottom of this buckle can mutually engage with screw rod or be separated.When buckle is separated with screw rod, sheath pipe can move freely, and the installation of support is more convenient; When buckle engages with screw rod, then control withdrawing or regaining of sheath pipe by regulating module.
The periphery of described inner core of the present invention is provided with helical cut groove.Helical cut groove can improve the bending property of inner core, enables conveyer device by complicated lesion locations, reduces induction system to the damage of blood vessel wall, reduces the complication such as thrombosis.
The far-end of described inner core of the present invention is provided with support bracket fastened fixed structure.
The two ends of the corresponding support of far-end of described sheath pipe of the present invention are respectively equipped with the Marking ring of development.
Described handle of the present invention is also provided with syringe pipe, this syringe pipe is connected with needle stand.
Beneficial effect of the present invention is: regulating module has two-stage speed-regulating function, precisely can regulate off-position and the rate of release of support, if be shifted a little in dispose procedure, also support can be regained conveyer device, to reorientate, to avoid in support dispose procedure because of the operative failure that causes of being shifted, drastically increase the success rate of operation; The core arrangement of helical cut can improve the bending property of system, enables conveyer device by complicated lesion locations, reduces induction system to the damage of blood vessel wall, reduces the complication such as thrombosis.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described further:
Fig. 1 is the unitary construction schematic diagram of conveyer device of the present invention;
Fig. 2 is the longitudinal profile structural representation of handle;
Fig. 3 is the Structure of cross section schematic diagram of regulating module;
Fig. 4 is the longitudinal profile structural representation of distal end of catheter.
Detailed description of the invention
With reference to figure 1, a kind of stent conveying device, comprise handle 1 and conduit 2, handle 1 is also provided with syringe pipe 3, this syringe pipe 3 is connected with needle stand 301, the longitudinal profile structure of distal end of catheter as shown in Figure 4, conduit 2 comprises inner core 201 and the sheath pipe 202 of socket, the far-end of inner core 201 coordinates with sheath pipe 202 and is used for placing rack, wherein the periphery of inner core 201 is provided with helical cut groove 203, and far-end is provided with support bracket fastened fixed structure 204, this fixed structure 204 is the terminal of one " T " shape, the two ends of the corresponding support of far-end of sheath pipe 202 are respectively equipped with the Marking ring (not shown) of development, handle longitudinal profile structure as shown in Figure 2, described handle 1 comprises the housing 101 of hollow tubular, is located at the regulating module 102 of housing 101 near-end, and is located at the screw rod 103 in housing 101, wherein, regulating module 102 is planetary gear structure, with reference to the regulating module Structure of cross section shown in figure 3, comprises sun gear 104, external toothing 105 and three planetary gears 106, and wherein external toothing 105 is fixed with the near-end of screw rod 103, the far-end of housing 101 is connected with the near-end of described inner core 201, the sidewall of described housing 101 is provided with chute 107 along the conduction orientation of described screw rod 103, the near-end of described sheath pipe 202 also connects the buckle 108 stretching out chute 107, the bottom of this buckle 108 can mutually engage with screw rod 103 or be separated, this buckle 108 can be snapped at screw rod 103 and form buckle structure, this buckle structure also can be a nut coordinated with screw rod 103 (not shown), nut and sheath pipe 202 in succession, form a buckle structure that can not be separated with screw rod 103.
During operation, first move sheath pipe 202, expose the support installing section of inner core 201, after support compression being inserted, package sheath pipe 202; Buckle structure is snapped at screw rod 103(nut and does not then need this step), after the far-end of device to be conveyed enters operative region location, rotating regulating module 102 can make sheath pipe 202 withdraw, releasing bracket, it withdraws speed and regulates by rotation external toothing 105 or sun gear 104, external toothing 105 realizes coarse adjustment, and sun gear 104 can realize fine setting; In dispose procedure, if support has displacement, regulating module 102 can be reversely rotated, support be regained, reorientates.
Certainly, above embodiment is merely illustrative and not limiting to the invention, the above is only preferred embodiment of the present invention, therefore all equivalences done according to the scheme described in patent claim of the present invention change or modify, and are included in patent claim of the present invention.