CN209713095U - A kind of anti-rotation hollow screw - Google Patents
A kind of anti-rotation hollow screw Download PDFInfo
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- CN209713095U CN209713095U CN201920118007.1U CN201920118007U CN209713095U CN 209713095 U CN209713095 U CN 209713095U CN 201920118007 U CN201920118007 U CN 201920118007U CN 209713095 U CN209713095 U CN 209713095U
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- Prior art keywords
- slot
- hollow
- hole
- worm screw
- screw
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- 239000002184 metal Substances 0.000 claims abstract description 29
- 210000000515 tooth Anatomy 0.000 claims abstract description 14
- 238000010079 rubber tapping Methods 0.000 claims abstract description 13
- 238000005553 drilling Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 238000003780 insertion Methods 0.000 claims abstract description 7
- 230000037431 insertion Effects 0.000 claims abstract description 7
- 210000003781 tooth socket Anatomy 0.000 claims description 5
- 206010017076 Fracture Diseases 0.000 description 21
- 210000000988 bone and bone Anatomy 0.000 description 14
- 238000010586 diagram Methods 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000035876 healing Effects 0.000 description 4
- 208000010392 Bone Fractures Diseases 0.000 description 3
- 230000036770 blood supply Effects 0.000 description 3
- 206010053962 Epiphyseal fracture Diseases 0.000 description 2
- 206010028851 Necrosis Diseases 0.000 description 2
- 210000002391 femur head Anatomy 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000017074 necrotic cell death Effects 0.000 description 2
- 108010048734 sclerotin Proteins 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 210000001694 thigh bone Anatomy 0.000 description 2
- 210000001604 vasa vasorum Anatomy 0.000 description 2
- 241000202814 Cochliomyia hominivorax Species 0.000 description 1
- 206010031264 Osteonecrosis Diseases 0.000 description 1
- 206010034246 Pelvic fractures Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 210000002745 epiphysis Anatomy 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 210000003189 scaphoid bone Anatomy 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
The utility model discloses a kind of anti-rotation hollow screws, including hollow rivet nut, several first through hole are arranged in interval in hollow nail body exterior side wall, inner core is inserted into hollow nail body, innercore sidewall corresponds to and is respectively arranged with the second through-hole at each first through hole position, guide rod is arranged in inner core inner wall, one side nail is installed respectively on each guide rod, side nail includes turbine end and self drilling tapping screw head, pilot hole is provided in the middle part of turbine end, guide rod is inserted into pilot hole, turbine end space outside is provided with several turbo tooths, the thread that helical structure is provided at each screw thread tooth slot position is corresponded on worm screw, worm screw is provided with adjusting block close to hollow rivet nut head one end；Lower bearing and upper bearing (metal) are embedded in lower bearing slot and upper bearing (metal) slot respectively, the interior embedding sealing lid above upper bearing (metal) of upper bearing (metal) slot, interior outer core two sides are symmetrically arranged the limited block in an insertion card slot；Adjusting block is connect with spanner, and hollow rivet nut head is provided with a limited cover.
Description
Technical field
The utility model relates to medical instruments field, specially a kind of anti-rotation hollow screw.
Background technique
Hollow rivet nut is to be used in the dry epiphysis of four limbs for internal fixation device fixed to fracture site pressurization in fracture operation
End, pelvic fracture, the interior fixation irregularly fractured, different-diameter hollow nail are used for different classification of fracture, and diameter 3.0mm is usual
For fracture of the scaphoid bone, small fracture avulsion, 4.0mm diameter is commonly used in epiphyseal fracture, and it is close that 6.5mm and 7.3mm are usually used in femur
End fracture and fracture of femoral condyle.Closed reduction is fractured first when use, and percutaneous merging positioning guide pin, fluoroscopic observation is led under C wall
If desired pin position is placed in more hollow rivet nuts and is then screwed into remaining in parallel using the parallel guider with adjustable casing and is led
Needle is open using hollow boring bit, and hollow screwdriver is screwed into the hollow rivet nut of pulling force.
Existing hollow rivet nut is mostly column structure, and single hollow nail can provide pressurization to fracture, to perpendicular to fracture line
Direction provides fixation, and anti-torsion is relied primarily on and is rubbed between frictional force and hollow nail and bone block between fracture site
Power, anti-torsion effect are unreliable.Since bone amount is limited in scaphoid, small bone block avulsion, epiphyseal fracture, fracture of tibial plateau,
Sometimes a hollow nail can only be implanted into and carry out pressurization fixation, there may be swing offsets for fracture site, lead to malunion,
Influence function of joint.Larger distorting stress is born near end of thighbone, often uses three hollow nails of Chinese character pin-shaped merging in fracture
Screw, to provide stable anti-rotation effect, implantation hollow nail quantity is more, and blood supply is destroyed big, it is possible to create nonunion,
Caput femoris necrosis.Existing hollow rivet nut nail middle section and tail portion are non-threaded, and threaded end can only be fixed when fixed, and non-threaded end is solid
It is poor to determine effect, hollow nail is fixed to be fixed by pulling force pressurization, and after the reduction of the fracture, persistent pressure may cause fracture site blood supply and answer,
There is a possibility that false healing in the fracture short time, surrounding sclerotin do not heal absorption, after a period of time around fracture line
Bone absorption healing, causes bone amount to reduce, and hollow nail length is constant, so that hollow nail be caused to deviate from.
Utility model content
The purpose of this utility model is to provide a kind of anti-rotation hollow screws, to solve mentioned above in the background art ask
Topic.
To achieve the above object, the utility model provides the following technical solutions: a kind of anti-rotation hollow screw, including hollow nail
Body, hollow rivet nut tail portion appearance are provided with flank, and two sides have been symmetrically arranged a card slot, hollow rivet nut at head opening
Several first through hole are arranged in interval in exterior side wall, are inserted into inner core in hollow nail body, innercore sidewall corresponds to each first through hole position
Place is respectively arranged with the second through-hole, is respectively set at inner wall of the inner core far from the second through-hole side and each second through-hole face position
One guide rod installs a side nail on each guide rod respectively；
Side nail includes turbine end and self drilling tapping screw head, and pilot hole, guide rod insertion guiding are provided in the middle part of turbine end
In hole, turbine end space outside is provided with several turbo tooths, the second through-hole of self drilling tapping screw head face and in the second through-hole
Wall is threadedly coupled；Interior in-core is provided perpendicular to the worm screw slot in side nail direction in side nail side, corresponds to each turbine end in worm screw slot
A screw thread tooth socket is respectively arranged at position, worm screw slot is embedded in a worm screw, is corresponded at each screw thread tooth slot position on worm screw
It is provided with the thread of helical structure, thread is mutually twisted with the turbo tooth of corresponding turbine end, and worm screw is close to hollow rivet nut head
Portion one end is provided with the adjusting block of cube structure；Hollow rivet nut head one end is provided with lower bearing slot in worm screw slot, leans on
Near-space heart rivet nut head one end is provided with upper bearing (metal) slot, is embedded with lower bearing and upper axis respectively in lower bearing slot and upper bearing (metal) slot
It holds, worm screw both ends are each passed through inside lower bearing and upper bearing (metal), the interior embedding sealing lid above upper bearing (metal) of upper bearing (metal) slot, outside inner core
Wall two sides are symmetrically arranged the limited block in an insertion card slot；
Hollow rivet nut is provided with limited cover close to one end of card slot, is provided with limiting slot in the middle part of limited cover, and spanner is from limit
It is clamped in lid insertion hollow nail body with adjusting block, spanner includes the adjusting rod parallel with worm screw, the one end of adjusting rod far from worm screw
The handlebar vertical with worm screw is installed, adjusting rod is internally provided with the clamping limit being adapted to adjusting block with adjusting block joint end
Slot, outside are provided with plum blossom burr.
Preferably, inner core is fixedly connected by the symmetrical dimidiation in middle part by screw between two halves.
Preferably, the size of first through hole is identical as the size of the second through-hole, and the central point of the two is on the same line.
Preferably, turbo tooth is parallel with worm screw.
Preferably, it is connected through a screw thread between upper bearing (metal) inner wall and worm screw.
Preferably, it seals and is connected through a screw thread between cover outer wall and upper bearing (metal) slot inner wall, be provided with and adjust in the middle part of sealing cover
The adjustment hole of plum blossom burr adaptation on pole.
Compared with prior art, the utility model has the beneficial effects that
1. the use of the new type after being implanted into hollow nail, is placed in anti-medial rotation core in hollow nail, pass through worm screw worm gear drive system
System, is screwed into from hollow nail side and is screwed into anti-rotation self tapping self-drilling screw perpendicular to hollow nail, provide anti-rotation holding power, can only make
With the anti-rotation performance for enhancing hollow nail in the fracture of a hollow rivet nut.
2. reducing the quantity for using hollow rivet nut in fractured near end of thighbone, protection reduces the damage of bone vasa vasorum system
Wound protects blood supply, reduces nonunion, caput femoris necrosis risk.
3. reducing hollow nail deviates from risk, the holding of anti-torsion can be not only provided perpendicular to the side nail in hollow nail direction
Power, and the bone as caused by bone absorption can be avoided to shorten healing after the reduction of the fracture, avoid bone shortening and hollow nail de-
Out.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the inside concrete structure schematic diagram of the utility model；
Fig. 3 is the concrete structure schematic diagram of the hollow rivet nut of the utility model；
Fig. 4 is the internal cross section figure of the inner core of the utility model；
Fig. 5 is that the inside of the inner core of the utility model has the sectional view of guide rod；
Fig. 6 is the concrete structure schematic diagram for the turbine end that the side of the utility model is followed closely；
Fig. 7 is the concrete structure schematic diagram for the self drilling tapping screw head that the side of the utility model is followed closely；
Fig. 8 is the concrete structure schematic diagram of the worm screw of the utility model；
Fig. 9 is the concrete structure schematic diagram of the lower bearing of the utility model；
Figure 10 is the concrete structure schematic diagram of the upper bearing (metal) of the utility model；
Figure 11 is the concrete structure schematic diagram of the spanner of the utility model；
Figure 12 is the concrete structure schematic diagram of the sealing cover of the utility model；
Figure 13 is the concrete structure schematic diagram of the limited cover of the utility model.
In figure: 1, hollow rivet nut；2, flank；3, card slot；4, first through hole；5, inner core；6, the second through-hole；7, it is oriented to
Bar；8, side is followed closely；9, turbine end；10, self drilling tapping screw head；11, pilot hole；12, turbo tooth；13, worm screw slot；14, thread
Slot；15, worm screw；16, thread；17, adjusting block；18, lower bearing slot；19, upper bearing (metal) slot；20, lower bearing；21, upper bearing (metal)；
22, lockset drive module；23, limited block；24, spanner；25, adjusting rod；26, handlebar；27, it is clamped limiting slot；28, it limits
Lid；29, plum blossom groove；30, plum blossom burr.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
In the description of the present invention, it should be noted that the instructions such as term "vertical", "upper", "lower", "horizontal"
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model and simplification
Description, rather than the device or element of indication or suggestion meaning must have a particular orientation, constructed and grasped with specific orientation
Make, therefore should not be understood as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
Fig. 1-13 is please referred to, the utility model provides a kind of technical solution: a kind of anti-rotation hollow screw, including hollow rivet nut
1, hollow 1 tail portion appearance of rivet nut is provided with flank 2, and two sides have been symmetrically arranged a card slot 3, hollow nail at head opening
Several first through hole 4 are arranged in interval in 1 exterior side wall of body, inner core 5 are inserted into hollow rivet nut 1, it is logical that 5 side wall of inner core corresponds to each first
The second through-hole 6, inner wall of the inner core 5 far from 6 side of the second through-hole and the just contraposition of each second through-hole 6 are respectively arranged at 4 position of hole
A guide rod 7 is respectively set in the place of setting, and installs a side nail 8 on each guide rod 7 respectively；
Side nail 8 includes turbine end 9 and self drilling tapping screw head 10, is provided with pilot hole 11, guide rod 7 in the middle part of turbine end 9
It is inserted into pilot hole 11,9 space outside of turbine end is provided with several turbo tooths 12,10 the second through-hole of face of self drilling tapping screw head
It 6 and is connect with 6 inner thread of the second through-hole；8 sides, which are followed closely, in side in inner core 5 is provided perpendicular to the worm screw slot 13 that 8 directions are followed closely in side,
It is corresponded in worm screw slot 13 and is respectively arranged with a screw thread tooth socket 14 at each 9 position of turbine end, worm screw slot 13 is embedded in a worm screw
15, correspond to the thread 16 that helical structure is provided at each 14 position of screw thread tooth socket on worm screw 15, thread 16 and corresponding turbine
The turbo tooth 12 at end 9 is mutually twisted, and worm screw 15 is provided with the adjusting block 17 of cube structure close to hollow 1 head one end of rivet nut；
Hollow 1 head one end of rivet nut is provided with lower bearing slot 18 in worm screw slot 13, is provided with close to hollow 1 head one end of rivet nut
Lower bearing 20 and upper bearing (metal) 21,15 both ends of worm screw difference are embedded in bearing groove 19, lower bearing slot 18 and upper bearing (metal) slot 19 respectively
Inside lower bearing 20 and upper bearing (metal) 21, interior embedding sealing lid 22,5 outer wall two of inner core above upper bearing (metal) 21 of upper bearing (metal) slot 19
Side is symmetrically arranged the limited block 23 in an insertion card slot 3；
Hollow rivet nut 1 is provided with limited cover 28 close to one end of card slot 3, and limiting slot 29 is provided in the middle part of limited cover 28, is pulled
Hand 24 is inserted into hollow rivet nut 1 from limited cover 28 and is clamped with adjusting block 17, and spanner 24 includes the adjusting rod 25 parallel with worm screw 15,
Adjusting rod 25 is equipped with the handlebar 26 vertical with worm screw 15, adjusting rod 25 and 17 joint end of adjusting block far from one end of worm screw 15
It is internally provided with the clamping limiting slot 27 being adapted to adjusting block 17, outside is provided with plum blossom burr 30.
Preferably, inner core 5 is fixedly connected by the symmetrical dimidiation in middle part by screw between two halves, convenient for inside inner core 5
The installation of part.
Preferably, the size of first through hole 4 is identical as the size of the second through-hole 6, and the central point of the two is on the same line
Convenient for passing through for side nail 8.
Preferably, turbo tooth 12 is parallel with worm screw 15.
Preferably, it is connected through a screw thread between 21 inner wall of upper bearing (metal) and worm screw 15.
Preferably, it is connected through a screw thread between 19 inner wall of 22 outer wall of sealing cover and upper bearing (metal) slot, is arranged in the middle part of sealing cover 22
There is the adjustment hole being adapted to the plum blossom burr 30 on adjusting rod 25.
Working principle: utilizing turbine and worm transmission principle, using the clamping limiting slot 27 of spanner 24 by the adjusting of worm screw 15
Block 17 connects and fixes, then rotating handle bar 26 rotates worm screw 15, the turbine of the thread 16 on worm screw 15 and corresponding turbine end 9
Tooth 12 is mutually twisted, thus 8 rotation of driving side nail, the self drilling tapping screw head 10 of side nail 8 is logical to first along 6 inner wall of the second through-hole
4 direction of hole is mobile, to be pierced by hollow rivet nut 1 and be inserted into bone, then is screwed into sealing cover 22 in inner core 5 admittedly by spanner 24
It is fixed, to improve the anti-torsion ability of hollow rivet nut 1, reduces and rotate position using fracture site when fixing in hollow rivet nut 1
It moves, malunion risk；1 quantity of hollow rivet nut that need to be used is reduced, bone vasa vasorum is protected, reduces nonunion
It closes, osteonecrosis risk, and nail 8 can provide support to sclerotin on rear side of the reduction of the fracture, avoid the bone as caused by bone absorption
Shorten healing, bone shortening and hollow rivet nut 1 is avoided to deviate from.The hollow 1 tail portion tip design of rivet nut of the utility model is from boring from bending
Type, tail portion tip are also designed to tapping screw, self drilling tapping screw, general type screw etc.；The sky of the utility model
Heart rivet nut 1 and 5 relative position of inner core are fixed by card slot 3 and limited block 23, herein can also be by arc chute, and buckle etc. reaches
Structure to same effect is realized；First through hole 4 in the utility model, the position of the second through-hole 6 and side nail 8, quantity without fixation,
And position can be designed in hollow rivet nut 1 and the corresponding any position of inner core 5, any direction.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of anti-rotation hollow screw, which is characterized in that including hollow rivet nut (1), hollow rivet nut (1) tail portion appearance is provided with spiral shell
Line face (2), two sides have been symmetrically arranged a card slot (3) at head opening, are spaced setting in hollow rivet nut (1) exterior side wall
Several first through hole (4), hollow rivet nut (1) is interior to be inserted into inner core (5), and inner core (5) side wall corresponds to the punishment of each first through hole (4) position
It is not provided with the second through-hole (6), at inner wall and each second through-hole (6) face position of the inner core (5) far from the second through-hole (6) side
A guide rod (7) is respectively set, a side nail (8) is installed respectively on each guide rod (7)；
Side nail (8) includes turbine end (9) and self drilling tapping screw head (10), is provided with pilot hole (11) in the middle part of turbine end (9), leads
Into bar (7) insertion pilot hole (11), turbine end (9) space outside is provided with several turbo tooths (12), self drilling tapping screw head
(10) it the second through-hole of face (6) and is connect with the second through-hole (6) inner thread；It is provided in side nail (8) side in inner core (5) vertical
The worm screw slot (13) in (8) direction is directly followed closely in side, is corresponded in worm screw slot (13) and is respectively arranged with a spiral shell at each turbine end (9) position
Line tooth socket (14), worm screw slot (13) are embedded in a worm screw (15), correspond on worm screw (15) and set at each screw thread tooth socket (14) position
It is equipped with the thread (16) of helical structure, thread (16) is mutually twisted with the turbo tooth (12) of corresponding turbine end (9), worm screw
(15) adjusting block (17) of cube structure is provided with close to hollow rivet nut (1) head one end；Far from hollow in worm screw slot (13)
Rivet nut (1) head one end is provided with lower bearing slot (18), and hollow rivet nut (1) head one end is provided with upper bearing (metal) slot (19),
Lower bearing (20) and upper bearing (metal) (21), worm screw (15) both ends difference are embedded in lower bearing slot (18) and upper bearing (metal) slot (19) respectively
It is internal across lower bearing (20) and upper bearing (metal) (21), the interior embedding sealing lid (22) above upper bearing (metal) (21) of upper bearing (metal) slot (19),
Inner core (5) outer wall two sides are symmetrically arranged the limited block (23) in insertion card slot (3)；
Hollow rivet nut (1) is provided with limited cover (28) close to the one end of card slot (3), is provided with limiting slot in the middle part of limited cover (28)
(29), spanner (24) is inserted into hollow rivet nut (1) from limited cover (28) and is clamped with adjusting block (17), and spanner (24) includes and worm screw
(15) parallel adjusting rod (25), adjusting rod (25) are equipped with the handlebar vertical with worm screw (15) far from the one end of worm screw (15)
(26), adjusting rod (25) is internally provided with the clamping limiting slot (27) being adapted to adjusting block (17) with adjusting block (17) joint end,
Outside is provided with plum blossom burr (30).
2. a kind of anti-rotation hollow screw according to claim 1, it is characterised in that: inner core (5) is symmetrically divided into two by middle part
Half, it is fixedly connected between two halves by screw.
3. a kind of anti-rotation hollow screw according to claim 1, it is characterised in that: the size and second of first through hole (4)
The size of through-hole (6) is identical, and the central point of the two is on the same line.
4. a kind of anti-rotation hollow screw according to claim 1, it is characterised in that: turbo tooth (12) and worm screw (15) are flat
Row.
5. a kind of anti-rotation hollow screw according to claim 1, it is characterised in that: upper bearing (metal) (21) inner wall and worm screw (15)
Between be connected through a screw thread.
6. a kind of anti-rotation hollow screw according to claim 1, it is characterised in that: sealing cover (22) outer wall and upper bearing (metal) slot
(19) it is connected through a screw thread between inner wall, is provided in the middle part of sealing cover (22) and is adapted to the plum blossom burr (30) on adjusting rod (25)
Adjustment hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920118007.1U CN209713095U (en) | 2019-01-24 | 2019-01-24 | A kind of anti-rotation hollow screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920118007.1U CN209713095U (en) | 2019-01-24 | 2019-01-24 | A kind of anti-rotation hollow screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209713095U true CN209713095U (en) | 2019-12-03 |
Family
ID=68681002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920118007.1U Active CN209713095U (en) | 2019-01-24 | 2019-01-24 | A kind of anti-rotation hollow screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209713095U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109700515A (en) * | 2019-01-24 | 2019-05-03 | 陈志伟 | A kind of anti-rotation hollow screw |
| CN112155703A (en) * | 2020-10-23 | 2021-01-01 | 江佩师 | Internal fixation device for axial fusion of lumbosacral vertebrae with built-in lock pins |
-
2019
- 2019-01-24 CN CN201920118007.1U patent/CN209713095U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109700515A (en) * | 2019-01-24 | 2019-05-03 | 陈志伟 | A kind of anti-rotation hollow screw |
| CN112155703A (en) * | 2020-10-23 | 2021-01-01 | 江佩师 | Internal fixation device for axial fusion of lumbosacral vertebrae with built-in lock pins |
| CN112155703B (en) * | 2020-10-23 | 2022-09-02 | 江佩师 | Internal fixation device for axial fusion of lumbosacral vertebrae with built-in lock pins |
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Effective date of registration: 20200117 Address after: 421001 No. 69 ship Hill Road, Shigu District, Hunan, Hengyang Patentee after: FIRST AFFILIATED HOSPITAL OF NANHUA UNIVERSITY Address before: 421001 Chuanshan Road 69, Hengyang City, Hunan Province Co-patentee before: Jiang Peishi Patentee before: Chen Zhiwei |