CN114343779A - Device for dispersing bone cement - Google Patents
Device for dispersing bone cement Download PDFInfo
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- CN114343779A CN114343779A CN202210024515.XA CN202210024515A CN114343779A CN 114343779 A CN114343779 A CN 114343779A CN 202210024515 A CN202210024515 A CN 202210024515A CN 114343779 A CN114343779 A CN 114343779A
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- cutter
- inner core
- bone cement
- sleeve
- cutters
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Abstract
The invention discloses a device for bone cement dispersion, which belongs to the field of orthopedic surgery instruments and comprises a sleeve, an inner core, a plurality of cutters arranged in the end part of the inner core and an adjusting mechanism for adjusting the positions of the cutters; the adjusting mechanism can drive the cutter to rotate, so that one end of the cutter is exposed out of the cutter groove; the end part of the inner core is provided with the cutter, so that a hardening belt on the inner surface of a vertebral cavity fractured by a patient can be punched, the dispersion of bone cement is facilitated, the anchoring of the bone cement is increased, the loosening condition of the bone cement after operation is reduced, and the strength of the fractured vertebral body can be improved due to the uniform dispersion and distribution of the bone cement; the end part of the inner core is provided with a plurality of cutters, so that holes with different angles can be left on the inner surface of the cavity of the vertebral body, and the dispersion and anchoring points of bone cement are increased; the sleeve is also provided with the limiting cylinder, so that the insertion depth of the inner core can be limited, the accurate and safe implementation of the operation is ensured, and the operation is safer.
Description
Technical Field
The invention relates to the field of orthopedic surgical instruments, in particular to a device for bone cement dispersion.
Background
In the vertebral fracture reduction operation, bone cement is used to fill the cavity in the vertebral body so as to achieve the aim of stabilizing the vertebral body, in the actual operation process, because patient fails in time to seek medical advice, form one deck sclerosis area in the centrum fracture crack, sclerosis area is more smooth, directly fill bone cement can make bone cement can not be to bone trabecula dispersion distribution on every side, form a more smooth lump, it is not hard up easily because of bone cement does not have the anchoring with bone trabecula on every side, can not reach better supporting effect, in addition centrum fracture is often in the old people crowd, senile osteoporosis, the sclerotin is relatively poor, the less massive bone cement of dispersion can add the destruction of heavy bone trabecula, lead to healing the back relatively poor, need the secondary operation even, the dispersion distribution of bone cement in the centrum is crucial to patient's healing, consequently, need design a device that can improve bone cement dispersion effect.
Disclosure of Invention
The invention provides a device for bone cement dispersion, which can solve the problem of poor bone cement dispersion effect in the prior art when filling bone cement.
A device for bone cement dispersion comprises a sleeve, an inner core arranged in the sleeve, a plurality of cutters arranged in the end part of the inner core and an adjusting mechanism for adjusting the positions of the cutters;
the end part of the inner core is provided with a plurality of cutter grooves for accommodating a plurality of cutters, and articulated shafts connected with the middle positions of the cutters are arranged in the cutter grooves; both ends of the cutter are conical;
the middle position of the cutter is also provided with a connecting rod which is used for being connected with the adjusting mechanism, and the adjusting mechanism can drive the cutter to rotate, so that one end of the cutter is exposed out of the cutter groove.
Preferably, the adjusting mechanism comprises a pull rod arranged in the inner core, a pull ring arranged at the end part of the pull rod and a plurality of spring groups corresponding to the cutters one by one;
a through hole for yielding the pull rod is formed in the inner core;
the spring group comprises two springs which are respectively positioned on two sides of the connecting rod, one end of each spring is connected with the pull rod, and the other end of each spring is connected with the connecting rod.
Preferably, a driving rod for driving the inner core to move in the length direction of the inner core is arranged in the sleeve, an external thread sleeve is arranged on the driving rod, and an internal thread matched with the external thread sleeve is arranged in the sleeve;
the inner core is square column shape, the tip of actuating lever with the tip of inner core is rotated and is connected.
Preferably, a limiting pipe is arranged in the pipe wall of the sleeve, an annular groove for accommodating the limiting pipe is formed in the inner wall of the sleeve, and an internal thread and an external thread which are matched with each other are respectively arranged on the annular groove and the limiting pipe;
and a pointer is further fixed outside the sleeve, and the end part of the limiting pipe is further provided with scale marks.
Preferably, the device also comprises a fixing rod for fixing the pull rod; the inner core is provided with a yielding groove for yielding the fixing rod;
the dead lever sets up in the cover pipe, the wedge groove has been seted up on the spacing inside pipe wall, the spring has been cup jointed on the dead lever under the effect of spring, the one end of dead lever can be contradicted the wedge inslot, works as when spacing pipe rotates, the other end of dead lever can be contradicted on the pull rod.
Preferably, the end of the cutter is conical and has a maximum diameter of 2 mm.
Preferably, the cutter is in an arc shape bending towards the inner core.
Compared with the prior art, the invention has the beneficial effects that: the end part of the inner core is provided with the cutter, so that a hardening belt on the inner surface of a vertebral cavity fractured by a patient can be punched, the dispersion of bone cement is facilitated, the anchoring of the bone cement is increased, the loosening condition of the bone cement after operation is reduced, and the strength of the fractured vertebral body can be improved due to the uniform dispersion and distribution of the bone cement;
the end part of the inner core is provided with the plurality of cutters, so that holes with different angles can be reserved on the inner surface of the cavity of the vertebral body, the dispersion and anchoring points of bone cement are increased, and the dispersion effect of the bone cement is improved;
the sleeve is also provided with the limiting cylinder, so that the insertion depth of the inner core can be limited, the accurate and safe implementation of the operation is ensured, and the operation is safer.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 in accordance with the present invention;
FIG. 4 is an enlarged view of a portion of the present invention at B of FIG. 2;
FIG. 5 is a schematic view of the end of the restraining tube of the present invention;
fig. 6 shows another tool shape according to the invention.
Description of reference numerals:
1. the device comprises a sleeve, 2, an inner core, 3, a cutter, 4, a cutter groove, 5, a connecting rod, 11, a pull rod, 12, a pull ring, 21, a driving rod, 22, an external thread sleeve, 31, a limiting pipe, 32, a pointer, 33 and a fixing rod.
Detailed Description
An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.
As shown in fig. 1 to 6, an embodiment of the present invention provides a device for bone cement dispersion, which includes a casing 1, an inner core 2 disposed in the casing 1, a plurality of cutters 3 disposed in an end of the inner core 2, and an adjusting mechanism for adjusting positions of the plurality of cutters 3;
the end part of the inner core 2 is provided with a plurality of cutter grooves 4 for accommodating a plurality of cutters 3, and articulated shafts connected with the middle positions of the cutters 3 are arranged in the cutter grooves 4; both ends of the cutter 3 are sharp;
a connecting rod 5 used for being connected with the adjusting mechanism is further arranged in the middle of the cutter 3, the adjusting mechanism can drive the cutter 3 to rotate, one end of the cutter 3 is exposed out of the cutter groove 4, as shown in fig. 1, one end of the cutter 3 is exposed out of the cutter groove 4 at the moment, the cutter 3 can swing back and forth by taking a hinge shaft as a center through the adjusting mechanism, two ends of the cutter 3 are respectively exposed out of the cutter groove 4, the orientations of the two ends of the cutter 3 are different, and thus two holes in opposite directions can be punched on a hardening belt on the inner wall of the cavity of the vertebral body, so that bone cement can be dispersed into the holes, the dispersion effect of the bone cement is improved, and the bone cement is prevented from being displaced;
as shown in fig. 6, the cutter 3 is curved toward the axial center of the core 2; this design allows for an increased angle of elevation of the tool 3 compared to the outwardly curved arc shape of fig. 4;
the end part of the cutter 3 is a conical cutter head, one end of the cutter head is a tip, the other end of the cutter head is circular, and the diameter of the circular end is 1.5mm-2 mm;
as shown in fig. 4, the adjusting mechanism includes a pull rod 11 disposed in the inner core 2, a pull ring 12 disposed at an end of the pull rod 11, and a plurality of spring sets corresponding to the plurality of cutters 3 one by one;
a through hole for yielding the pull rod 11 is formed in the inner core 2;
the spring set comprises two springs which are respectively positioned at two sides of the connecting rod 5, one end of each spring is connected with the pull rod 11, and the other end of each spring is connected with the connecting rod 5;
the cutter 3 can be driven to rotate by pulling and pushing the pull rod 11, one end of the cutter 3 close to the end part of the inner core 2 can be exposed out of the cutter groove 4 when the pull rod 11 is pushed, and the other end of the cutter 3 can be exposed out of the cutter groove 4 when the pull rod 11 is pulled;
because the head of the inner core 2 is provided with the plurality of cutters 3, the inner surface of the cavity of the vertebral body is not uniform, the end part of one part of the cutters 3 is abutted against the inner surface of the cavity of the vertebral body, while the other part is not contacted with the inner wall of the cavity of the vertebral body, at the moment, the inner core 2 is moved to punch holes, and a plurality of holes can not be punched, so that the pull rod 11 is connected with the connecting rod 5 through the spring, when one cutter 3 is abutted against the inner surface of the cavity of the vertebral body, the rest cutters 3 can continue to rotate until all the cutters 3 are abutted against the inner surface of the cavity of the vertebral body, and the inner core 2 is moved again, so that the holes with the same number as the cutters 3 can be reserved on the inner surface of the cavity of the vertebral body;
as shown in fig. 3, a driving rod 21 for driving the inner core 2 to move in the length direction is arranged in the sleeve 1, an external thread sleeve 22 is arranged on the driving rod 21, and an internal thread matched with the external thread sleeve 22 is arranged in the sleeve 1;
the inner core 2 is in a square column shape, the end part of the driving rod 21 is rotatably connected with the end part of the inner core 2, and the driving rod 21 is rotated to drive the inner core 2 to axially move;
a limiting pipe 31 is arranged in the pipe wall of the sleeve 1, an annular groove for accommodating the limiting pipe 31 is formed in the inner wall of the sleeve 1, and internal threads and external threads which are matched with each other are respectively arranged on the annular groove and the limiting pipe 31; the limiting pipe 31 can be moved in the axial direction of the sleeve 1 by rotating the limiting pipe 31, so that the movable distance and stroke of the driving rod 21 can be adjusted, the hole depth of a drilled hole can be adjusted according to requirements, and the condition that a patient is accidentally injured due to excessive stress is prevented;
the limiting tube 31 is only used for limiting the depth of the inner core 2 inserted into the patient body, so that the condition that the patient vertebral body is injured due to too deep insertion is prevented;
as shown in fig. 5, a pointer 32 is further fixed outside the casing 1, and the end of the limiting tube 31 is further provided with scale marks, where the specific scale marks are based on actual requirements.
The device also comprises a fixing rod 33 used for fixing the pull rod 11; the inner core 2 is provided with an abdicating groove for abdicating the fixing rod 33;
the fixing rod 33 is arranged in the sleeve 1, the inner wall of the limiting pipe 31 is provided with a wedge-shaped groove 34, the fixing rod 33 is sleeved with a spring, one end of the fixing rod 33 can be abutted against the wedge-shaped groove 34 under the action of the spring, and when the limiting pipe 31 rotates, the other end of the fixing rod 33 can be abutted against the pull rod 11;
the wedge-shaped groove 34 is a cavity structure with a conical shape;
when rotating spacing pipe 31, dead lever 33 can contradict on pull rod 11, can prevent the reseing of pull rod 11 when loosening pull ring 12, also can remind the doctor to go to rotate spacing pipe 31 and adjust the maximum stroke that inner core 2 removed in addition, avoids stretching into the condition emergence that the patient was injured by mistake to the distance overlength because of forgetting to adjust the stroke.
The working principle is as follows: when in use, a doctor inserts the device into a working sleeve, so that the head of the inner core 2 reaches the inner surface of a fractured vertebral body of a patient, then pushes the pull rod 11, the pull rod 11 drives the cutter 3 to rotate through a spring, one end of the cutter 3 tilts and abuts against the inner surface of the vertebral body cavity, then screws the limiting tube 31, firstly adjusts the maximum stroke (generally 5mm-10mm) according to requirements, secondly extrudes the fixed rod 33 through the wedge-shaped groove 34 to fix the pull rod 11, then screws the driving rod 21 to enable the inner core 2 to move inwards, the cutter head of the cutter 3 ejects a small hole on a hardened band on the inner surface of the vertebral body cavity, then reversely screws the driving rod 21 to enable the inner core 2 to reset, then screws the limiting tube 31 to enable the fixed rod 33 to reset, and then pulls the pull rod 11 outwards to enable the other end of the cutter 3 to tilt and abut against the inner surface of the other angle of the vertebral body cavity, and then, completing the punching work according to the steps, and finally resetting and taking out the device, thereby carrying out the filling work of the bone cement.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art.
Claims (7)
1. The device for dispersing bone cement is characterized by comprising a sleeve, an inner core arranged in the sleeve, a plurality of cutters arranged in the end part of the inner core and an adjusting mechanism for adjusting the positions of the cutters;
the end part of the inner core is provided with a plurality of cutter grooves for accommodating a plurality of cutters, and articulated shafts connected with the middle positions of the cutters are arranged in the cutter grooves; both ends of the cutter are conical;
the middle position of the cutter is also provided with a connecting rod which is used for being connected with the adjusting mechanism, and the adjusting mechanism can drive the cutter to rotate, so that one end of the cutter is exposed out of the cutter groove.
2. The device for bone cement dispersion according to claim 1, wherein the adjustment mechanism comprises a pull rod disposed in the core, a pull ring disposed at an end of the pull rod, and a plurality of spring sets corresponding to a plurality of the cutters one by one;
a through hole for yielding the pull rod is formed in the inner core;
the spring group comprises two springs which are respectively positioned on two sides of the connecting rod, one end of each spring is connected with the pull rod, and the other end of each spring is connected with the connecting rod.
3. The device for dispersing bone cement according to claim 2, wherein a driving rod for driving the inner core to move in the length direction is provided in the sleeve, an external thread sleeve is provided on the driving rod, and an internal thread matched with the external thread sleeve is provided in the sleeve;
the inner core is square column shape, the tip of actuating lever with the tip of inner core is rotated and is connected.
4. The device for dispersing bone cement according to claim 3, wherein a limiting pipe is arranged in the wall of the sleeve, an annular groove for accommodating the limiting pipe is formed in the inner wall of the sleeve, and an internal thread and an external thread which are matched with each other are respectively arranged on the annular groove and the limiting pipe;
and a pointer is further fixed outside the sleeve, and the end part of the limiting pipe is further provided with scale marks.
5. The device for bone cement dispersion of claim 4, further comprising a fixation rod for fixing the pull rod; the inner core is provided with a yielding groove for yielding the fixing rod;
the dead lever sets up in the cover pipe, the wedge groove has been seted up on the spacing inside pipe wall, the spring has been cup jointed on the dead lever under the effect of spring, the one end of dead lever can be contradicted the wedge inslot, works as when spacing pipe rotates, the other end of dead lever can be contradicted on the pull rod.
6. A device for bone cement dispersion according to claim 1 wherein the end of the cutter is conical and has a maximum diameter of 2 mm.
7. A device for bone cement dispersion according to claim 1 wherein the cutter is arcuate in shape curving towards the inner core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210024515.XA CN114343779A (en) | 2022-01-11 | 2022-01-11 | Device for dispersing bone cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210024515.XA CN114343779A (en) | 2022-01-11 | 2022-01-11 | Device for dispersing bone cement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114343779A true CN114343779A (en) | 2022-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210024515.XA Pending CN114343779A (en) | 2022-01-11 | 2022-01-11 | Device for dispersing bone cement |
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| Country | Link |
|---|---|
| CN (1) | CN114343779A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116421260A (en) * | 2023-06-14 | 2023-07-14 | 北京医院 | Bone cement cleaner |
-
2022
- 2022-01-11 CN CN202210024515.XA patent/CN114343779A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116421260A (en) * | 2023-06-14 | 2023-07-14 | 北京医院 | Bone cement cleaner |
| CN116421260B (en) * | 2023-06-14 | 2023-10-03 | 北京医院 | Bone cement cleaner |
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