CN207532436U - A kind of minimally invasive replacement and fixation system of pelvis - Google Patents

Abstract

The utility model is related to a kind of minimally invasive replacement and fixation system of pelvis, the system includes at least assembled casing, straight peen probe and elbow bradawl；Assembled casing is made of outer tube and several inner sleeves being inserted in outer tube, and the pipe diameter size of several inner sleeves differs, and can be successively socketed to small sequence greatly by caliber, and tube wall is equipped with Handheld Division on the outside of the outer end of the outer tube；The inserting end end of straight peen probe is equipped with spherical propulsion end, and the bore of an inner sleeve is longer 0.1 0.5mm than the maximum radial length of the straight peen probe inserting end；The inserting end end of elbow bradawl is equipped with to the elbow of curving and promotes end, and the bore of an inner sleeve is longer 0.1 0.8mm than the maximum radial length of the elbow bradawl inserting end.The fixed system has the advantages of easy to operate, fine tuning is convenient, and perceptibility is strong, and protection soft tissue effect is good.

Description

A kind of minimally invasive replacement and fixation system of pelvis

Technical field

The utility model is related to medical instruments fields, and in particular to a kind of pelvis applied to pelvis acetabular bone and fracture is minimally invasive The application method of replacement and fixation system and the system.

Background technology

It after fracturing at pelvis, generally requires and carries out operative reduction and interior fixation, minimal invasive techniques are implemented to be closed multiple at present It is fixed in the cannulated screws of position, specific method to be placed in hollow nail guide pin first, after along guide pin be screwed into screw；But the bone of human body Basin have extremely complex 3 D anatomy structure, surrounding soft tissue is abundant, percutaneously put nail depth it is big, put needle operating difficulties, therefore, The ideal position that can guide pin be smoothly penetrated in bone is the key that operation success or failure.

At present, the minimally invasive replacement and fixation medical procedure of pelvis includes the minimally invasive interior fixation of computer navigation subpelvic and camber line needle skill Art (or caput medusae technology).But both methods is being promoted and is being had the shortcomings that in implementation process, under computer navigation The defects of pelvis minimally invasive internal fixation method is：1st, expensive, only a small number of Grade A hospitals are had ready conditions purchase；2nd, learning curve Long, technology requirement is high；3rd, after injecting, patient cannot have movement, otherwise put nail and will appear offset；4th, screw still cuts out etc. concurrent Disease；5th, operating time is long.

It is the defects of camber line needle technology for another example：1st, guide pin is because will pass through hollow nail, relatively thin, too soft, traveling process In be easily bent, hollow screw is caused to pass through difficulty；2nd, guide pin is thinner and softer, is easily bent in traveling process, also leads to it Because of the blocking of bone channel when advancing in bone channel, it is difficult to which guide pin is made to be rotated according to the direction of operation；3rd, the method is External handle taps merging, can not perceive whether there is breakthrough cortex of bone with feel；4th, because of caput medusae guide pin bent at its tip, cause hollow Nail can not be screwed into guide pin leading edge, and when guide pin is exited by hollow nail, and leading edge knee easily snaps off.

For above-mentioned technical problem, existing patent CN103239285A discloses a kind of minimally invasive pelvic fracture and percutaneously puts nail group Conjunction tool, including casing, straight peen probe and elbow probe, described sleeve pipe end is sharp, forms a tip.Tip can make set Pipe is accurately positioned in the smooth bone inclined-plane of pelvis, and drilling can be finely adjusted as needed, and most suitable nail is put to choose Position, when the stray of straight peen probe, encounter cortex bone blocking or wear out cortex bone accidentally when, using elbow probe instead can be with It prevents that end is promoted to fall into original screw way.But the technology is thin there are still the above problem, such as straight peen probe and elbow probe body Long solid cylindrical, diameter 2mm or 2.5mm are still easily bent in traveling process, it is difficult to which the direction according to operation rotates, make It must adjust and be inaccurate.In addition, in entire surgical procedure, the respective sleeve for not adapting to whole process carries out body tissue Protection.

Utility model content

The purpose of the utility model is to overcome in the prior art the defects of, design is a kind of to be applied to pelvis acetabular bone and fracture The minimally invasive replacement and fixation system of pelvis, the fixed system have it is easy to operate, fine tuning it is convenient, perceptibility is strong, protection soft tissue effect The advantages of fruit is good.

To achieve the above object, technical solution is a kind of minimally invasive replacement and fixation system of pelvis used by the utility model, The system includes at least assembled casing, straight peen probe and elbow bradawl；

The assembled casing is made of outer tube and several inner sleeves being inserted in outer tube, several described inner sleeves The pipe diameter size of pipe differs, and can be successively socketed to small sequence greatly by caliber, tube wall on the outside of the outer end of the outer tube It is equipped with Handheld Division；

The inserting end end of the straight peen probe is equipped with spherical propulsion end, and the bore of an inner sleeve is than the straight peen The long 0.1-0.5mm of maximum radial length of probe inserting end；

The inserting end end of the elbow bradawl is equipped with to the elbow of curving and promotes end, in the pipe of an inner sleeve Diameter is longer 0.1-0.8mm than the maximum radial length of the elbow bradawl inserting end.

Wherein preferred scheme, tube wall is equipped with circular base on the outside of the outer end of the outer tube, and the Handheld Division is along ring Shape pedestal radially extends the long handle construction of rear outward bending.

Wherein preferred scheme, each inner sleeve are equipped with the limited block set on tube body end；Any two is nested In the inner sleeve connect, the internal diameter of the inner sleeve in outside is bigger 0.1-0.5mm than the outer diameter of the inner sleeve of inside；The outer tube Internal diameter is bigger 0.1-0.5mm than the outer diameter of outermost inner sleeve；In the inner sleeve to socket-connect, the outer path length of the limited block is than set It is connected to the big 2-5mm of caliber of the inner sleeve of its outer wall.

Further, after the outer tube and several inner sleeves are mutually socketed combination, the limiting of outermost inner sleeve Block exposes to housing pipe end just, and the limited block side of the inner sleeve pipe end offsets successively.

Further, after the outer tube and several inner sleeves are mutually socketed combination, the front end point of the inner sleeve It does not stretch out in outside the outer tube or inner sleeve in its socket outside.

In another preferred embodiment, the elbow bradawl is the stock construction being gradually reduced from end to point diameter, Stock end is equipped with hand holding handle.Preferably, the maximum value of the long shank diameter of the elbow bradawl is 4.5mm, minimum value 2mm； It is 4.2mm that the elbow, which promotes the maximum radial length at end,

In another preferred embodiment, the stock that the straight peen probe is gradually reduced from end to point diameter constructs, length Bar end is equipped with holding rod.Preferably, a length of 190-210mm of stock of the straight peen probe；The stock of the straight peen probe is straight The maximum value of diameter is 3.5mm, minimum value 1.5mm；The bulb diameter at the spherical propulsion end is 2.5mm

The minimally invasive replacement and fixation system of pelvis described in the utility model has the following advantages that compared to the prior art：

(1) instrument in replacement and fixation system is simple, and cost of manufacture is cheap so that complicated pelvis acetabular bone and fractures Simplify；

(2) without very long learning curve, technology requirement is low, reduces to the clinical experience doctor that performs the operation for the use of the instrument Requirement, make related surgical that can also carry out in basic hospital；

(3) it during the use of the utility model instrument, reduces to patient compliance's degree, patient is allowed to have in surgical procedure micro- It is dynamic, and the ease of Use feature of instrument shortens operating time；

(4) the utility model replacement and fixation system in operation, by the cooperation of assembled casing and other each instruments, The precision of positioning can be improved, preferably protects soft tissue；

(5) the stock construction of elbow bradawl and straight peen probe from thick to thin, makes it have enough intensity, hollow opening During nail channel, channel can be avoided to be bent well；Convenience during fine tuning positioning is improved simultaneously, excludes bone blocking；

(6) hand-held of each instrument promotes in replacement and fixation system, can preferably perceive instrument whether there is breakthrough cortex of bone, Make surgical procedure safe and reliable；

(7) convenience of the more casing replacing of assembled casing so that when channel is opened, the device that will can open its channel easily Tool is converted into guide pin, and hollow screw is being placed in by guide pin.

Description of the drawings

Fig. 1 is the diagrammatic cross-section of the outer tube of the minimally invasive replacement and fixation system of pelvis；

Fig. 2 is the diagrammatic cross-section of the inner sleeve 11 of the minimally invasive replacement and fixation system of pelvis；

Fig. 3 is the diagrammatic cross-section of the inner sleeve 12 of the minimally invasive replacement and fixation system of pelvis；

Fig. 4 is the diagrammatic cross-section of the inner sleeve 13 of the minimally invasive replacement and fixation system of pelvis

Fig. 5 is the combining structure schematic diagram of the assembled casing of the minimally invasive replacement and fixation system of pelvis；

Fig. 6 is the composite structure front view of the assembled casing of the minimally invasive replacement and fixation system of pelvis；

Fig. 7 is the structure diagram of the elbow bradawl of the minimally invasive replacement and fixation system of pelvis；

Fig. 8 is the structure diagram of the straight peen probe of the minimally invasive replacement and fixation system of pelvis.

Specific embodiment

With reference to the accompanying drawings and examples, specific embodiment of the present utility model is further described.Implement below Example is only used for clearly illustrating the technical solution of the utility model, and the protection model of the utility model cannot be limited with this It encloses.

A kind of minimally invasive replacement and fixation system of pelvis applied to pelvis acetabular bone and fracture of the utility model, the system is extremely Include assembled casing 1, straight peen probe 2 and elbow bradawl 3 less.The assembled casing 1 is by outer tube 10 and is inserted in outer tube 10 Several interior inner sleeves 11,12,13 are formed, and the pipe diameter size of several inner sleeves 11,12,13 differs, and can It is socketed successively to small sequence greatly by caliber, tube wall is equipped with Handheld Division 101 on the outside of the outer end of the outer tube 10.This is covered successively The construction connect makes it in surgical procedure, and corresponding to corresponding casing according to the different instruments of operating procedure carries out compounding practice.

The inserting end end of the straight peen probe 2 be equipped with it is spherical promote end 20, described in the bore ratio of an inner sleeve The long 0.1-0.5mm of maximum radial length of 2 inserting end of straight peen probe；Straight peen probe 5 is made to ensure that it can when stretching into inner sleeve It keeps straight on, and will not shift along circuits diameter.The inserting end end of the elbow bradawl 3 is equipped with to the elbow of curving and pushes away Inlet side 30, the bore of an inner sleeve are longer 0.1-0.8mm than the maximum radial length of 3 inserting end of elbow bradawl；Make Elbow bradawl 3 ensures that it can keep straight on, and will not shift along circuits diameter when stretching into inner sleeve.

Fig. 1 shows the construction of the outer tube 10 of the minimally invasive replacement and fixation system of the utility model pelvis, the outer tube 10 Outer end on the outside of tube wall be equipped with circular base 100, the Handheld Division 101 is along circular base 100 to radially extend rear outward bending Long handle construction.Angle between the 101 bending segment axis of Handheld Division and the axis of the outer tube 10 is 120-135 °, excellent It is selected as 127 °.

In the utility model embodiment, each inner sleeve is equipped with the limited block set on tube body end.It is specifically, interior The quantity of casing is 3, and the tube body end of the inner sleeve 11 of Fig. 2 is equipped with limited block 111；The tube body end of the inner sleeve 12 of Fig. 3 Equipped with limited block 121；The tube body end of the inner sleeve 13 of Fig. 4 is equipped with limited block 131.

In the inner sleeve to socket-connect, 11 internal diameter of inner sleeve in outside is bigger 0.1-0.5mm than the outer diameter of inner sleeve 12；Outside 12 internal diameter of inner sleeve of side is bigger 0.1-0.5mm than the outer diameter of inner sleeve 13；The internal diameter of the outer tube 10 is than outermost inner sleeve The big 0.1-0.5mm of outer diameter of pipe 11.

In the inner sleeve to socket-connect, the caliber of inner sleeve 11 that the 121 outer fineness ratio of limited block is socketed on its outer wall is big 2-5mm.The 131 outer fineness ratio of limited block is socketed on the big 2-5mm of caliber of the inner sleeve 12 of its outer wall.

As seen in figs. 5-6, it is outermost interior after the outer tube 10 and 3 inner sleeves 11,12,13 are mutually socketed combination The limited block 111 of casing 11 exposes to 10 end of outer tube just, and 111 side of limited block offsets with 121 side of limited block, limiting 121 opposite side of block offsets with 131 side of limited block.In a further preferred embodiment, the front end of the inner sleeve 11 point It does not stretch out in outside the outer tube 10 in its socket outside, the front end of the inner sleeve 12 stretches out in the inner sleeve in its socket outside respectively Outside 11, the front end of the inner sleeve 13 is stretched out in respectively outside the inner sleeve 12 in its socket outside.

1 above-described embodiment of the utility model assembled casing is described as the citing description of the utility model, wherein inner sleeve number It measures to illustrate preferably, and not exclusive restriction；The numerical values recited gap of casing inner diameter outer diameter its realization mutually socket can pull and It is adjusted, is not specifically limited on the basis of not shaking；Limited block outer diameter size with adjacent limited block based on it can mutually support It can carry out the adjustment of actual numerical value.In following specific embodiments, preferable examples are carried out to 1 each casing of assembled casing.

The quantity of the utility model inner sleeve is 3, by outer to the interior sequence of socket relationship, the outer diameter of the inner sleeve 11 A length of 14.8mm, interior path length 8.5mm；The a length of 8.3mm of outer diameter of inner sleeve 12, a length of 5mm of internal diameter；The outer diameter of inner sleeve 13 is a length of 4.8mm, a length of 2.8mm of internal diameter.The a length of 18mm of outer diameter of the outer tube 10, a length of 15mm of internal diameter.

Fig. 7 shows the structure of the elbow bradawl 3 of the minimally invasive replacement and fixation system of the utility model pelvis.The elbow bradawl 3 be the stock construction being gradually reduced from end to point diameter, and stock end is equipped with hand holding handle 31.Hand holding handle 31 is preferably ring Shape stock constructs.In a particularly preferred embodiment, a length of 190-210mm of stock of the elbow bradawl 3；The elbow bradawl The maximum value of 3 long shank diameter is 4.5mm, minimum value 2mm；It is 4.2mm that the elbow, which promotes the maximum radial length at end 30,. The elbow promotes the curved interior at end 30 to be additionally provided with a section, makes propulsion end Integral bending curved surface smoother, and section side is not easy It slides.

Fig. 8 shows the structure of the straight peen probe 2 of the minimally invasive replacement and fixation system of the utility model pelvis.The straight peen probe The 2 stock constructions being gradually reduced from end to point diameter, stock end is equipped with holding rod 21.In specific preferred embodiment In, the stock a length of 190-210mm, 21 a length of 90-100mm of holding rod of the straight peen probe 2；The straight peen probe 2 The maximum value of long shank diameter is 3.5mm, minimum value 1.5mm；The bulb diameter at the spherical propulsion end 20 is 2.5mm.

The basic operation process of the minimally invasive replacement and fixation system of the utility model pelvis is as follows：

1st, under C-arm perspective, bone entry point at pelvis acetabular bone is determined, under the protection of combined sleeve 1, with 2.8mm points Cone is percutaneously open in bone entry point；

2nd, the inner sleeve 13 of 2.8mm pointed cones and internal diameter for 2.8mm is taken out, elbow bradawl 3 is in the inner sleeve 12 that internal diameter is 5mm Protection is lower to be advanced by soft tissue into property opening to the marrow, and in the bone channel that C-arm perspective lower edge makes a reservation for；

3rd, perspective is lower observes, if channel is estimated in direction of travel deviation, can rotate bradawl handle 3, make the curved of 3 tip of bradawl Head promotes end 30 to continue to move ahead backwards to offset direction, then deviates can be corrected

4th, continue to move ahead, 31 adjustment direction of rotating hand handle, which is allowed to return, if offset estimates channel；

If the 5, fracture end has displacement, elbow can be adjusted and end 30 is promoted to be allowed to the Contralateral fracture end towards displacement, and with hand It agitates handle to assist to reset, be completed until resetting, 3 tip of elbow bradawl enters Contralateral fracture end and continues to move ahead；

6th, into elbow bradawl 3 can be extracted out after fracture end offside a distance, entered in channel with straight peen probe and detected This channel whether there is breakthrough cortex of bone.Again the inner sleeve 13 that internal diameter is 2.8mm is inserted in combined sleeve 1, and sky is placed in along sleeve The heart follows closely guide pin；

7th, the hollow nail for being suitble to length is selected according to measurement result, takes out the inner sleeve 13 and internal diameter 5mm of internal diameter 2.8mm Inner sleeve 12, by hollow nail along internal diameter be 8.5 inner sleeve along guide pin guiding under be screwed into；

8th, guide pin and sleeve are exited, is sewed up the incision.

The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art For art personnel, under the premise of the utility model technical principle is not departed from, several improvements and modifications can also be made, these change The scope of protection of the utility model is also should be regarded as into retouching.

Claims (11)

1. a kind of minimally invasive replacement and fixation system of pelvis, which is characterized in that the system includes at least assembled casing (1), straight peen is visited Needle (2) and elbow bradawl (3)；

The assembled casing (1) is by outer tube (10) and several inner sleeve (11, the 12,13) structures being inserted in outer tube (10) Into the pipe diameter size of several inner sleeves (11,12,13) differs, and can successively be covered to small sequence greatly by caliber It connects, tube wall is equipped with Handheld Division (101) on the outside of the outer end of the outer tube (10)；

The inserting end end of the straight peen probe (2) is equipped with spherical propulsion end (20), the bore ratio of an inner sleeve (13) The long 0.1-0.5mm of maximum radial length of straight peen probe (2) inserting end；

The inserting end end of the elbow bradawl (3) is equipped with to the elbow of curving and promotes end (30), and the elbow promotes end (30) curved interior is equipped with a section；The bore of one inner sleeve (12) is than elbow bradawl (3) inserting end most The long 0.1-0.8mm of big radical length.

2. the minimally invasive replacement and fixation system of pelvis as described in claim 1, which is characterized in that outside the outer end of the outer tube (10) Side pipe wall is equipped with circular base (100), and the Handheld Division (101) is to radially extend rear outward bending along circular base (100) Long handle constructs.

3. the minimally invasive replacement and fixation system of pelvis as claimed in claim 2, which is characterized in that Handheld Division (101) bending segment Angle between the axis of axis and the outer tube (10) is 120-135 °.

4. the minimally invasive replacement and fixation system of pelvis as claimed in claim 3, which is characterized in that Handheld Division (101) bending segment Angle between the axis of axis and the outer tube (10) is 127 °.

5. the minimally invasive replacement and fixation system of pelvis as described in claim 1, which is characterized in that each inner sleeve (11,12, 13) it is equipped with the limited block (111,121,131) set on tube body end；

In the inner sleeve (11,12,13) that any two socket-connects, the internal diameter of the inner sleeve (11,12) in outside is than the inner sleeve of inside Manage the big 0.1-0.5mm of outer diameter of (12,13)；The internal diameter of the outer tube (10) is bigger than the outer diameter of outermost inner sleeve (11) 0.1-0.5mm；

In the inner sleeve (11,12,13) to socket-connect, the outer path length of the limited block (121,131) is than being socketed in its outer wall The big 2-5mm of caliber of casing (11,12).

6. the minimally invasive replacement and fixation system of pelvis as claimed in claim 5, which is characterized in that the outer tube (10) and several After inner sleeve (11,12,13) mutually socket combination, the limited block (111) of outermost inner sleeve (11) exposes to housing just (10) end is managed, limited block (111,121,131) side of inner sleeve (11, the 12,13) end offsets successively.

7. the minimally invasive replacement and fixation system of pelvis as claimed in claim 6, which is characterized in that the outer tube (10) and several After inner sleeve (11,12,13) mutually socket combination, the front end of the inner sleeve (11,12,13) stretches out in its socket outside respectively Outer tube (10) or inner sleeve (11,12) outside.

8. the minimally invasive replacement and fixation system of pelvis as claimed in claim 5, which is characterized in that the inner sleeve (11,12,13) Quantity is 3, by outer to the interior sequence of socket relationship, the outer path length of the inner sleeve (11,12,13) be followed successively by 14.8mm, 8.3mm, 4.8mm, interior path length are followed successively by 8.5,5mm, 2.8mm；

The a length of 18mm of outer diameter of the outer tube (10), a length of 15mm of internal diameter.

9. the minimally invasive replacement and fixation system of pelvis as described in claim 1, which is characterized in that the elbow bradawl (3) is from end The stock construction being gradually reduced to point diameter is held, stock end is equipped with hand holding handle (31).

10. the minimally invasive replacement and fixation system of pelvis as described in claim 1, which is characterized in that the stock of the elbow bradawl (3) A length of 190-210mm；The maximum value of the long shank diameter of the elbow bradawl (3) is 4.5mm, minimum value 2mm；The elbow pushes away The maximum radial length of inlet side (30) is 4.2mm.

11. the minimally invasive replacement and fixation system of pelvis as described in claim 1, which is characterized in that the straight peen probe (2) is from end The stock construction being gradually reduced to point diameter, stock end is equipped with holding rod (21)；

The a length of 190-210mm of stock of the straight peen probe (2), a length of 90-100mm of the holding rod (21)；The straight peen is visited The maximum value of the long shank diameter of needle (2) is 3.5mm, minimum value 1.5mm；It is described it is spherical promote end (20) bulb diameter be 2.5mm。