CN205514865U

CN205514865U - Become rail formula bone cement filled device

Info

Publication number: CN205514865U
Application number: CN201521047861.1U
Authority: CN
Inventors: 张兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-12-14
Filing date: 2015-12-14
Publication date: 2016-08-31
Anticipated expiration: 2025-12-14

Abstract

The utility model discloses a become rail formula bone cement filled device belongs to the medical instrument field, and the device is including becoming rail formula expander subassembly, becoming rail formula bone cement filled ware subassembly, soft brill, and its unique design lies in passageway front end arc track and have an area of the shape pore with the communicating side of track that fixed track and side square duct have restricted the direction behind the injection hose stand out channel, make it cross central line arrival centrum offside along specific direction. Through the length of adjusting injection hose vomitorium, can make bone cement reach our required position on request, reduced operation time when improving the operation curative effect, avoided the relapse perspective and to patient and doctor's radiation, simultaneously, reduced because of the misery that two side punctures brought for patient, wanted to reach good bone cement distribution effect because of the unilateral, and adjust needle angle and cross that high pressure injects bone cement and the probability of the bone cement seepage that causes has reduced complication such as the damage of neural blood vessel, embolism repeatedly.

Description

A kind of change rail Cement fixation device

Technical field

This utility model relates to medical instruments field, injects service aisle device in particular to a kind of bone cement.

Background technology

Along with China steps into aging society, senile osteoporosis spinal vertebral fracture just drastically influence the quality of life of old people, according to statistics, without under external force or slight external force, the crowd of more than 70 years old has 20% compression fracture of vertabral body can occur, causes patient's lumbago and backache, difficulty of standing up and get up.Vertebroplasty (Percutaneous Vertebro Plasty, PVP) is a kind of percutaneous puncture, pathological changes vertebral body injection bone cement, by reinforcing pathological changes vertebral body thus lenitive Minimally Invasive Surgery.It can significantly alleviate elderly patient occur because of long-term bed osteoporosis increase the weight of, the severe complication such as hypostatic pneumonia, lower limb vein thrombus, pressure ulcer, PVP is to alleviating acute pain, getting up early out-of-bed activity has very great help, clinical practice at present is quite varied, and operate under local anaesthesia, greatly reduce the operation risk of gerontal patient.

Traditional PVP Centesis instrument is craspedodrome passage, vertebral body can be entered from one or both sides vertebral pedicle puncture, but no matter set up passage from one or both sides, there are the shortcomings and limitations that it is certain: one side enters, restriction because of pedicle of vertebral arch angle, passage is only capable of reaching homonymy hemivertebra, very difficult cross center line reaches offside, after so causing bone cement to inject, it is only capable of being distributed in one side, and can not be uniformly distributed around vertebral body center, there are some researches show that bone cement mal-distribution in vertebral body can cause the load-bearing of vertebral body one side to cause unstable spine, puncture offside Vertebral Compression deformation is caused under constant load, especially when patient's lateral movement, the probability that adjacent vertebral bodies can be made to fracture due to the bone cement seepage of bone cement skewness or one side increases；Bilateral pedicle of vertebral arch sets up passage, although problem symmetrical in solving bone cement vertebral body, but add operation wound, need to complete under X-ray guides because of this operation simultaneously, too increase the X-ray radiation quantity X of doctor and patient, so being not a kind of good modus operandi.

Utility model content

Based on above problem, if although a kind of service aisle of design enters from one side, but bone cement can be evenly distributed to whole vertebral body, it not only solves single respective drawback of the dual pathways, and decreases the misery of patient and reduce the amount of radiation that doctor is chronically exposed under ray.

The purpose of this utility model is that providing a kind of becomes rail Cement fixation device, mainly solve existing craspedodrome passage to be difficult to arrive offside, injected bone cement is substantially distributed in homonymy, it is uniformly and symmetrically distributed to reach bone cement, passage need to be increased at offside, which not only adds the misery of patient, extend operating time, and add x-ray radiation.

nullThis utility model provides a kind of change rail Cement fixation device，Including becoming rail dilator assembly、Become rail Cement fixation device assembly，Described change rail dilator assembly includes trocar sheath and is sheathed on the inner core within this trocar sheath，The centrage of this trocar sheath overlaps with the centrage of this inner core，The side of described trocar sheath is bullet end，Described bullet end is the hollow structure leaving inside guide pin passage，Above described bullet end, pipeline has inside arc track and tube wall side opening，This tube wall side opening is the extension of the tube wall of described arc track sleeve A outside，This arc track ensures that with this tube wall side opening above-mentioned change rail Cement fixation device assembly head end is after contacting arc track，Skid off from tube wall side opening by definitive orbit，To side, orientation extends，Wherein，The diameter of tube wall side opening is identical with the internal diameter of trocar sheath，The internal diameter of described trocar sheath is more than the diameter of this guide pin passage，And tube wall side opening position is marked in trocar sheath tail end same plane，With clearly work middle tube wall side opening towards；The head end of the inner core of described change rail dilator assembly is inner core extrados, mate completely with the arc track in described trocar sheath, described interior in-core is provided with guide pin passage, its described guide pin passage with this trocar sheath head end is point-blank, this inner core is inserted in described trocar sheath A, trocar sheath side opening can be blocked by the head end of described inner core B, prevents sclerotin from entering.

Further, described change rail Cement fixation device assembly includes trocar sheath and is placed in the piston within this trocar sheath, first 1/3 section of this trocar sheath and this piston is soft, latter 2/3 section is rigid, the overall diameter of this trocar sheath is identical with the inner core diameter of described change rail dilator assembly, this trocar sheath described and this piston front 1/3 section for soft to ensure when described change rail Cement fixation device assembly is inserted in the trocar sheath of described change rail dilator assembly, head end smooth break-in when touching arc track when described change rail Cement fixation device assembly, described tube wall side opening along described trocar sheath skids off smoothly, this trocar sheath described and this piston rear 2/3 section for rigid to ensure when injecting bone cement, hand-held stablizes and controllable property.

Further, this change rail Cement fixation device also includes soft brill, when this soft brill can not break through sclerotin for the tube wall side opening when the described change rail Cement fixation device assembly head end described change rail dilator assembly trocar sheath of arrival, it is achieved get out passage in sclerotin.

Above-mentioned change rail Cement fixation device, side punctures, bone cement can be uniformly injected into vertebral body both sides.This device becomes rail dilator assembly, becomes rail Cement fixation device assembly, soft brill part composition, the design of its uniqueness is the trocar sheath front end arc track becoming rail dilator assembly and the sidewall circle duct communicated with track, fixing track and sidewall duct, limit and become the direction after the soft position of trocar sheath of rail Cement fixation device assembly goes out to become the trocar sheath of rail dilator assembly so that it is arrive vertebral body offside along specific direction cross center line.The length of rail Cement fixation device assembly Vomitory is become by regulation, bone cement can be made to reach the position that we are required on request, so it is possible not only to make bone cement be uniformly and symmetrically distributed in vertebral body, improve operative effect, and greatly reduce operating time, it is to avoid repeatedly perspective and to patient and the radiation of doctor；Simultaneously, reduce because bilateral punctures the misery brought to patient, because good bone cement distributed effect is wanted to reach in one side, and repeatedly adjust needle angle and the probability of bone cement seepage that excess pressure is injected bone cement and caused, decrease the complication such as neural blood vessel damage, thromboembolism.

Inner core head end uses cambered design, not only matches with passage inner orbit, and side opening also can completely be blocked by its dorsal part, prevents sclerotin from entering in passage, by channel blockage, becomes rail Cement fixation device assembly and is difficult to stretch out.

The design of soft brill, is to bore, by it, the matter that opens seam, and makes change rail Cement fixation device assembly reach preferable purpose smoothly.And change rail Cement fixation device assembly is designed to front 1/3 into flexible pipe, its object is to when becoming rail Cement fixation device assembly head end when touching passage arc track, direction along ng a path skids off from duct, side and reaches vertebral body offside smoothly, rear 2/3 is hard tube, its object is to when application inject piston inject bone cement time, operation is sane, is beneficial to control.Leave guide pinhole at the trocar sheath and inner core body becoming rail dilator assembly, its objective is that making passage enter direction along guide pin enters vertebral body.

The beneficial effects of the utility model are, by the arc track of the trocar sheath front end of change rail dilator assembly being provided with and matched side-wall hole, can make change rail Cement fixation device assembly head end after contact arc track, change rapidly original direction, stretch out until vertebral body offside from trocar sheath sidewall, so have only to puncture in vertebral body side just to arrive the purpose that bone cement is uniformly and symmetrically distributed in vertebral body, improve operative effect, and greatly reduce operating time, it is to avoid repeatedly perspective and to patient and the radiation of doctor；Simultaneously, reduce because bilateral punctures the misery brought to patient, because good bone cement distributed effect is wanted to reach in one side, and repeatedly adjust needle angle and the probability of bone cement seepage that excess pressure is injected bone cement and caused, decrease the complication such as neural blood vessel damage, thromboembolism.

Accompanying drawing explanation

With embodiment, this utility model is further illustrated below in conjunction with the accompanying drawings.

Fig. 1, change rail dilator assembly split figure (trocar sheath A, inner core B).

Fig. 2, change rail dilator assembly constitutional diagram.

Fig. 3, change rail Cement fixation device assembly split figure (trocar sheath C, piston D).

Fig. 4, change rail Cement fixation device assembly constitutional diagram.

Fig. 5, change rail Cement fixation device operating diagram.

Fig. 6, change rail Cement fixation device schematic diagram in vertebroplasty.

In figure: 1, tube wall side opening；2, arc track；3, guide pin passage；4, bullet end；5, inner core extrados；6, inner core guide pin passage；7, latter 2/3 section of trocar sheath C；8, first 1/3 section of trocar sheath C；9, latter 2/3 section of piston D；10, first 1/3 section of piston D.

Detailed description of the invention

Below by specific embodiment and combine accompanying drawing this utility model is further elaborated.

nullAs Fig. 1-6 shows change rail Cement fixation device，Including becoming rail dilator assembly、Become rail Cement fixation device assembly，Described change rail dilator assembly includes trocar sheath A and is sheathed on the inner core B within this trocar sheath A，The centrage of this trocar sheath A overlaps with the centrage of this inner core B，The side of described trocar sheath A is bullet end 4，Described bullet end 4 is the hollow structure leaving inside guide pin passage 3，Above described bullet end 4, pipeline has inside arc track 2 and tube wall side opening 1，This tube wall side opening 1 is the extension of the tube wall of described arc track 2 sleeve A outside，This arc track 2 ensures that with this tube wall side opening 1 above-mentioned change rail Cement fixation device assembly head end is after contacting arc track 2，Skid off from tube wall side opening 1 by definitive orbit，To side, orientation extends，Wherein，The diameter of tube wall side opening 1 is identical with the internal diameter of trocar sheath A，The internal diameter of described trocar sheath A is more than the diameter of this guide pin passage 3，And tube wall side opening 1 position is marked in trocar sheath tail end same plane，With clearly work middle tube wall side opening towards；The head end of the inner core B of described change rail dilator assembly is inner core extrados 5, mate completely with the arc track 2 in described trocar sheath A, inner core guide pin passage 6 it is provided with in described inner core B, its described guide pin passage 3 with this trocar sheath A head end is point-blank, in this inner core B is inserted described trocar sheath A, trocar sheath side opening can be blocked by the head end of described inner core B, prevents sclerotin from entering；nullDescribed change rail Cement fixation device assembly includes trocar sheath C and is placed in the piston D within this trocar sheath C，First 1/3 section 8 of this trocar sheath C and this piston D，10 be soft，Latter 2/3 section 7 of this trocar sheath C and this piston D，9 is rigid，The overall diameter of this trocar sheath C is identical with the inner core B diameter of described change rail dilator assembly，First 1/3 section 8 of this trocar sheath C and this piston D，10 for soft to ensure when being inserted in the trocar sheath A of described change rail dilator assembly by described change rail Cement fixation device assembly，Head end smooth break-in when touching arc track 2 when described change rail Cement fixation device assembly，Described tube wall side opening 1 along described trocar sheath A skids off smoothly，Latter 2/3 section 7 of this trocar sheath C and this piston D，9 for rigid to ensure when injecting bone cement，Hand-held stablizes and controllable property；This change rail Cement fixation device also includes soft brill, when this soft brill can not break through sclerotin for the tube wall side opening 1 as the described change rail Cement fixation device assembly head end described change rail dilator assembly trocar sheath A of arrival, it is achieved get out passage in sclerotin.

nullBefore thrusting vertebral body with bone cone percutaneous along pedicle of vertebral arch direction after 1/3，Indwelling guide pin，Before the change rail dilator assembly that trocar sheath A in Fig. 1 and inner core B combine is inserted vertebral body along guide pin direction 1/3，Adjust tube wall side opening 1 direction，It is made to be directed at vertebral body center line，Extract inner core B，Trocar sheath A is made to stay in vertebral body，Soft boring is inserted in trocar sheath A，Arrive after tube wall side opening 1 has resistance when soft brill touches arc track 2 break-in，Rotate tail end handle，Vertebral body offside is pierced by center line，Extract soft brill，The change rail Cement fixation device assembly being made up of trocar sheath C and internal piston D is inserted along passage，After trocar sheath C front end flexible pipe arrives precalculated position，One hand-held hard tube，Inject piston D on the other hand，The bone cement poured in advance is slowly injected in vertebral body，Rail Cement fixation device assembly length outside trocar sheath A is become by regulation，Bone cement is made to be uniformly distributed in offside and the homonymy of vertebral body.

Change rail Cement fixation device of the present utility model passes through track and the side opening of passage of Channel front end arc, ensure that becoming rail Cement fixation device assembly can orient arrival vertebral body offside, so have only to puncture in vertebral body side just to arrive the purpose that bone cement is uniformly and symmetrically distributed in vertebral body, improve while operative effect and greatly reduce operating time, it is to avoid repeatedly perspective and to patient and the radiation of doctor；Simultaneously, also reduce because bilateral punctures the misery brought to patient, because good bone cement distributed effect is wanted to reach in one side, and repeatedly adjust needle angle and the probability of bone cement seepage that excess pressure is injected bone cement and caused, decrease the advantages such as complication such as neural blood vessel damage, thromboembolism.

Claims

null1. one kind becomes rail Cement fixation device，Including becoming rail dilator assembly、Become rail Cement fixation device assembly，It is characterized in that，Described change rail dilator assembly includes trocar sheath A and is sheathed on the inner core B within this trocar sheath A，The centrage of this trocar sheath A overlaps with the centrage of this inner core B，The side of described trocar sheath A is bullet end (4)，Described bullet end (4) is the hollow structure leaving inside guide pin passage (3)，Described bullet end (4) top pipeline has inside arc track (2) and tube wall side opening (1)，This tube wall side opening (1) is the extension of the tube wall of described arc track (2) sleeve A outside，This arc track (2) ensures that with this tube wall side opening (1) above-mentioned change rail Cement fixation device assembly head end is after contacting arc track (2)，Skid off from tube wall side opening (1) by definitive orbit，To side, orientation extends，Wherein，The diameter of tube wall side opening (1) is identical with the internal diameter of trocar sheath A，The internal diameter of described trocar sheath A is more than the diameter of this guide pin passage (3)，And tube wall side opening (1) position is marked in trocar sheath tail end same plane，With clearly work middle tube wall side opening towards；The head end of the inner core B of described change rail dilator assembly is inner core extrados (5), mate completely with the arc track (2) in described trocar sheath A, inner core guide pin passage (6) it is provided with in described inner core B, its described guide pin passage (3) with this trocar sheath A head end is point-blank, this inner core B is inserted in described trocar sheath A, trocar sheath side opening can be blocked by the head end of described inner core B, prevents sclerotin from entering.
nullA kind of change rail Cement fixation device the most according to claim 1，It is characterized in that，Described change rail Cement fixation device assembly includes trocar sheath C and is placed in the piston D within trocar sheath C，Front 1/3 section (8) of trocar sheath C and front 1/3 section (10) of piston D are soft，Rear 2/3 section (7) of trocar sheath C and rear 2/3 section (9) of piston D are rigid，The overall diameter of trocar sheath C is identical with the inner core B diameter of described change rail dilator assembly，Front 1/3 section (8) of described trocar sheath C and front 1/3 section (10) of piston D are soft to ensure when being inserted in the trocar sheath A of described change rail dilator assembly by described change rail Cement fixation device assembly，Head end smooth break-in when touching arc track (2) when described change rail Cement fixation device assembly，Described tube wall side opening (1) along described trocar sheath A skids off smoothly，Rear 2/3 section (7) of described trocar sheath C and rear 2/3 section (9) of piston D are rigid to ensure when injecting bone cement，Hand-held stablizes and controllable property.
A kind of change rail Cement fixation device the most according to claim 1, it is characterized in that, this change rail Cement fixation device also includes soft brill, when this soft brill can not break through sclerotin for the tube wall side opening (1) as the described change rail Cement fixation device assembly head end described change rail dilator assembly trocar sheath A of arrival, it is achieved get out passage in sclerotin.