Direction-controllable bone cement injector

Abstract

The utility model relates to the technical field of medical instruments, and provides a direction-controllable bone cement injector, which comprises a guide injection tube, a bone cement injection tube, a bone cement injection tube and a bone cement injection tube, the supporting tube is provided with a bone cement injection hole; the direction control pipe comprises a first hard pipe, a second hard pipe and a hose; the left pull wire penetrates through the left wire hole, and the lower end of the left pull wire is fixedly connected with the left side face of the middle of the hose; the right pull wire penetrates through the right wire hole, and the lower end of the right pull wire is fixedly connected with the right side face of the middle of the hose; and a tube cavity of the protective sleeve is in clearance fit with the guide injection tube. The bone cement injection device has the advantages that after the protective sleeve penetrates into a vertebral body, the guide injection tube is inserted into the protective sleeve, the bent shape of the hose and the direction of the bone cement injection hole are changed by operating the left pull wire and the right pull wire, the guide injection tube can be rotated, and the direction of the bone cement injection hole is changed, so that the bone cement is uniformly filled in the vertebral body; the effect of stabilizing the centrum by the bone cement is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a controllable bone cement injector. Background Art

[0002] Bone cement is the common name for bone adhesive, a medical material used in orthopedic surgery. It has such a common name because some of its physical properties and its appearance and properties after solidification are quite similar to white cement used in construction and decoration.

[0003] In vertebroplasty surgery, bone cement needs to be injected into the vertebral body. The medical technology of filling bone joints and gaps with bone cement can stabilize the vertebral body. Vertebroplasty surgery is roughly as follows: under the guidance of the C-arm machine, a puncture needle is first inserted into the vertebral body to obtain a puncture hole, and then the puncture hole is enlarged with a dilator, and the protective sleeve is left in the puncture hole as a working channel; a drill is inserted into the working channel to clear the bone channel, and a channel for the balloon to be placed in the vertebral body is established. The vacuum-drawn balloon catheter is inserted into the vertebral body through the protective sleeve, and the balloon is gradually enlarged and contrast agent is added to the balloon. Under the perspective of the C-arm machine, the changes of the balloon in the vertebral body are observed, osteoporosis is detected, and the balloon catheter is removed; the straight tube of the bone cement filler is inserted into the protective sleeve, and the push rod of the bone cement filler is pushed to push the bone cement in the straight tube directly into the vertebral body. Finally, the bone cement filler and the protective sleeve are removed and the wound is covered.

[0004] like Figure 1 As shown, the bone cement filler currently on the market includes a straight tube 11 and a push rod 12. The existing medical syringe first injects bone cement into the interior of the straight tube 11, removes the air in the straight tube 11, and then inserts the straight tube 11 into the protective sleeve, and then pushes the push rod 12 from the tube mouth of the straight tube 11 to push the bone cement in the straight tube 11 directly into the vertebral body. The injection direction of the straight tube of this bone cement filler is single, and it is difficult to change the injection direction of the bone cement through the straight tube, which makes it difficult to uniformly fill the bone cement inside the vertebral body, reducing the effect of bone cement in stabilizing the vertebral body.

[0005] Therefore, how to change the injection direction of bone cement is a technical problem that needs to be solved urgently in this field. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a controllable bone cement injector which can change the ejection direction of the bone cement.

[0007] The utility model is implemented as follows: a controllable bone cement injector, comprising:

[0008] A guide injection tube having a bone cement flow hole, a left guide wire hole and a right guide wire hole;

[0009] A support tube having a bone cement injection hole, the bottom end of the support tube is fixedly connected to the top end of the guide injection tube, and the bone cement injection hole is communicated with the bone cement flow hole;

[0010] The control tube comprises a first hard tube, a second hard tube and a soft tube, the top end of the first hard tube is fixedly connected to the bottom end of the guide injection tube, the bottom end of the first hard tube is fixedly connected to the top end of the soft tube, the bottom end of the soft tube is fixedly connected to the top end of the second hard tube, the second hard tube has a bone cement ejection hole, and the bone cement ejection hole is communicated with the bone cement flow hole;

[0011] A left traction wire passes through the left wire hole, and the lower end of the left traction wire is fixedly connected to the left side surface of the second rigid tube;

[0012] A right traction wire passes through the right wire hole, and the lower end of the right traction wire is fixedly connected to the right side surface of the second rigid tube;

[0013] A protective sleeve, wherein the lumen of the protective sleeve is in clearance with the guide injection tube, the support tube is exposed at the top end of the protective sleeve, and the second hard tube is exposed at the bottom end of the protective sleeve.

[0014] Furthermore, it also includes:

[0015] A left horizontal axis, fixedly connected to the left side wall of the support tube;

[0016] A right horizontal axis, fixedly connected to the right side wall of the support tube;

[0017] The upper end of the left traction line is tied to the left horizontal axis, and the upper end of the right traction line is tied to the right horizontal axis.

[0018] Furthermore, it also includes:

[0019] A left adjusting wheel, wherein a central hole of the left adjusting wheel is rotationally connected to the left horizontal axis;

[0020] A left knob, fixedly connected to the left adjusting wheel;

[0021] A right adjusting wheel, wherein a center hole of the right adjusting wheel is rotationally connected to the right transverse axis;

[0022] A right knob, fixedly connected to the right adjusting wheel;

[0023] The upper end of the left traction line is wound around the left adjusting wheel, and the upper end of the right traction line is wound around the right adjusting wheel.

[0024] Furthermore, it also includes:

[0025] A left positioning pin, the left knob is provided with a plurality of circumferentially spaced left positioning holes, the left horizontal axis is provided with a left positioning slot, and the left positioning pin can pass through one of the left positioning holes and then be inserted into the left positioning slot;

[0026] The right positioning pin, the right knob is provided with a plurality of right positioning holes arranged at intervals in a circumference, the right horizontal axis is provided with a right positioning groove, and the right positioning pin can pass through one of the right positioning holes and then be inserted into the right positioning groove.

[0027] Furthermore, the top end of the guide injection tube has a stop shoulder, and the stop shoulder can abut against the top end of the protective sleeve.

[0028] Furthermore, the hose is a corrugated metal hose, and the first hard tube and the second hard tube are both metal hard tubes.

[0029] Furthermore, it also includes: a handle, wherein the handle is fixedly connected to the protective sleeve.

[0030] The advantages of the utility model are as follows: after the protective sleeve is inserted into the vertebral body, the guide injection tube is inserted into the interior of the protective sleeve, and the bending shape of the hose is changed by operating the left traction line and the right traction line, thereby changing the direction of the bone cement injection hole, and the guide injection tube can be rotated to change the direction of the bone cement injection hole, so that the bone cement is filled in the vertebral body more evenly, thereby improving the effect of bone cement in stabilizing the vertebral body. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0032] Figure 1 It is a structural schematic diagram of a bone cement filler in the background technology.

[0033] Figure 2 It is a schematic diagram of the external structure of the controllable bone cement injector of the utility model.

[0034] Figure 3 It is a schematic diagram of the push rod being inserted into the support tube in the utility model.

[0035] Figure 4 It is a schematic diagram of the positions of the guide injection tube, the support tube and the hose in the utility model.

[0036] Figure 5 yes Figure 4 Schematic diagram from top view.

[0037] Figure 6 It is a schematic diagram of the positions of the support tube, the left adjusting wheel, the left knob, the right adjusting wheel and the right knob in the utility model.

[0038] Figure 7It is a connection diagram of the left horizontal axis, the left adjusting wheel, the left knob and the left positioning pin in the utility model.

[0039] Figure 8 It is a schematic diagram showing that the left positioning holes in the utility model are arranged at intervals on the circumference of the left knob.

[0040] Fig. 9 It is an internal schematic diagram of the protective sleeve in the utility model.

[0041] Fig.10 It is an internal schematic diagram of the guide injection tube, the support tube and the hose in the utility model.

[0042] Fig.11 It is an internal schematic diagram of the controllable bone cement injector in the utility model.

[0043] Fig.12 It is a schematic diagram of the bending of the hose in the utility model.

[0044] Fig.13 It is a structural schematic diagram of the metal hose in the utility model.

[0045] Fig.14 This is a schematic diagram of the shape of the galvanized steel strip and the PVC surface layer in the utility model. Figure 1 .

[0046] Fig.15 This is a schematic diagram of the shape of the galvanized steel strip and the PVC surface layer in the utility model. Figure 2 .

[0047] Figure numerals: bone cement filler 1; straight tube 11; push rod 12; guide injection tube 2; bone cement flow hole 21; left wire hole 22; right wire hole 23; shoulder 24; support tube 3; bone cement injection hole 31; left horizontal axis 32; right horizontal axis 33; left adjusting wheel 34; right adjusting wheel 35; left knob 36; left positioning pin 361; left positioning hole 362; right knob 37; right positioning pin 371; control tube 4; first hard tube 41; second hard tube 42; hose 43; galvanized steel strip 431; PVC surface layer 432; bone cement injection hole 44; left traction line 5; right traction line 6; protective sleeve 7; handle 71. DETAILED DESCRIPTION

[0048] The embodiment of the utility model provides a controllable bone cement injector, the purpose of which is to provide a medical device tool that can change the direction of the bone cement injection hole. Compared with the single bone cement injection direction of the background technology, the utility model allows the bone cement to be evenly filled in the vertebral body, thereby improving the effect of bone cement in stabilizing the vertebral body.

[0049] The overall idea of ​​the technical solution in the embodiment of the utility model is as follows:

[0050] The lumen gap of the guide injection tube and the protective sleeve are matched, so that the guide injection tube can slide and rotate in the lumen of the protective sleeve. The bone cement enters the bone cement injection hole of the support tube from the medical syringe, and then enters the bone cement injection hole of the control tube through the bone cement flow hole of the guide injection tube. By operating the left traction line and the right traction line, the bending shape of the hose is changed, thereby changing the direction of the bone cement injection hole. When the guide injection tube is rotated, the control tube and the bone cement injection hole also rotate accordingly, so that the bone cement is more evenly filled in the vertebral body. A push rod is inserted from the bone cement injection hole of the support tube to push the bone cement in the tube into the vertebral body. The length of the push rod shall not exceed the sum of the lengths of the support tube, the guide injection tube and the first hard tube.

[0051] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0052] See also Figures 1 to 15 , a preferred embodiment of the utility model.

[0053] A controllable bone cement injector, comprising:

[0054] The guide injection tube 2 has a bone cement flow hole 21, a left guide wire hole 22 and a right guide wire hole 23;

[0055] The support tube 3 has a bone cement injection hole 31, the bottom end of the support tube 3 is fixedly connected to the top end of the guide injection tube 2, and the bone cement injection hole 31 is communicated with the bone cement flow hole 21; the bone cement injection hole of the support tube 3 is used to connect to an existing medical syringe and to receive a push rod.

[0056] The control tube 4 includes a first hard tube 41, a second hard tube 42 and a soft tube 43. The top end of the first hard tube 41 is fixedly connected to the bottom end of the guide injection tube 2, the bottom end of the first hard tube 41 is fixedly connected to the top end of the soft tube 43, the bottom end of the soft tube 43 is fixedly connected to the top end of the second hard tube 42, and the second hard tube 42 has a bone cement injection hole 44, which is communicated with the bone cement flow hole 21; the bone cement coming out of the medical syringe passes through the bone cement injection hole 31, the bone cement flow hole 21, and the bone cement injection hole 44 in sequence.

[0057] The left traction wire 5 passes through the left wire hole 22, and the lower end of the left traction wire 5 is fixedly connected to the left side of the second hard tube 42; when the left traction wire 5 is pulled, the left traction wire 5 drives the second hard tube 42 to make the hose 43 bend to the left, and the right traction wire 6 is in a relaxed state.

[0058] The right traction line 6 passes through the right wire hole 23, and the lower end of the right traction line 6 is fixedly connected to the right side surface of the second hard tube 42; when the right traction line 6 is pulled, the right traction line 6 drives the second hard tube 42 to make the hose 43 bend to the right, and the left traction line 5 is in a released state.

[0059] The protective sleeve 7 has a lumen that is gap-matched with the guide injection tube 2 , the support tube 3 is exposed at the top of the protective sleeve 7 , and the second hard tube 42 is exposed at the bottom of the protective sleeve 7 . The guide injection tube 2 can slide and rotate in the protective sleeve 7 .

[0060] It also includes: a left horizontal axis 32, fixedly connected to the left side wall of the support tube 3;

[0061] The right horizontal axis 33 is fixedly connected to the right side wall of the support tube 3;

[0062] The upper end of the left traction line 5 is tied to the left horizontal axis 32, and the upper end of the right traction line 6 is tied to the right horizontal axis 33. After operating the left traction line 5 and the right traction line 6 to bend the hose 43, after determining the direction of the bone cement injection hole 44, the upper end of the left traction line 5 is tied to the left horizontal axis 32, and the upper end of the right traction line 6 is tied to the right horizontal axis 33, and the bending state of the hose 43 is maintained at this time. When it is necessary to adjust the direction of the bone cement injection hole 44 again, the left traction line 5 and the right traction line 6 are untied and operated again.

[0063] It also includes: a left adjusting wheel 34, the center hole of the left adjusting wheel 34 is rotatably connected to the left horizontal shaft 32;

[0064] A left knob 36, fixedly connected to the left adjusting wheel 34;

[0065] A right adjusting wheel 35, wherein a central hole of the right adjusting wheel 35 is rotatably connected to the right transverse shaft 33;

[0066] A right knob 37, fixedly connected to the right adjusting wheel 35;

[0067] The upper end of the left traction line 5 is wound around the left adjustment wheel 34, and the upper end of the right traction line 6 is wound around the right adjustment wheel 35. The staff operates the left knob 36 to drive the left adjustment wheel 34, so that the left traction line 5 is wound around the left adjustment wheel 34 or released from the left adjustment wheel 34; the staff operates the right knob 37 to drive the right adjustment wheel 35, so that the right traction line 6 is wound around the right adjustment wheel 35 or released from the right adjustment wheel 35. When the left adjustment wheel 34 is in the winding state, the right adjustment wheel 35 is in the releasing state; when the left adjustment wheel 34 is in the releasing state, the right adjustment wheel 35 is in the winding state.

[0068] It also includes: a left positioning pin 361, the left knob 36 is provided with a plurality of left positioning holes 362 arranged circumferentially at intervals, the left horizontal axis 32 is provided with a left positioning slot, the left positioning pin 361 can pass through one of the left positioning holes 362 and then be inserted into the left positioning slot; after the left positioning pin 361 is inserted, the left knob 36 is fixed, and after the left positioning pin 361 is pulled out, the left knob 36 can be operated to rotate.

[0069] The right positioning pin 371, the right knob 37 is provided with a plurality of right positioning holes arranged at intervals in a circumference, the right horizontal axis 33 is provided with a right positioning slot, the right positioning pin 371 can pass through one of the right positioning holes and then be inserted into the right positioning slot. After the right positioning pin 371 is inserted, the right knob 37 is fixed, and after the right positioning pin 371 is pulled out, the right knob 37 can be operated to rotate.

[0070] The top end of the guide injection tube 2 has a stop shoulder 24, and the stop shoulder 24 can abut against the top end of the protection sleeve 7. The stop shoulder 24 prevents the support tube 3 from entering the protection sleeve 7.

[0071] The hose 43 is a corrugated metal hose, and the first hard tube 41 and the second hard tube 42 are both metal hard tubes. The corrugated metal hose 43 is a high-quality flexible pipe in modern industrial pipelines, which has many characteristics such as good flexibility, fatigue resistance, high pressure bearing, good temperature resistance, corrosion resistance, strong sealing, etc., and has a much longer life than other hoses (rubber hoses, plastic hoses). The hose 43 can also be Figures 13 to 15 The metal hose shown has a galvanized steel strip 431 and a PVC surface 432 layer, and has higher strength.

[0072] It also includes a handle 71, which is fixedly connected to the protective sleeve 7. The handle 71 facilitates the taking and operation of the protective sleeve 7. The diameter of the protective sleeve 7 is equivalent to the diameter of a common chopstick.

[0073] The working mode of the controllable bone cement injector of the utility model is as follows:

[0074] The protective sleeve 7 is punctured at the specified position of the vertebral body. The existing medical syringe first fills the cement into the bone cement injection hole 31, the bone cement flow hole 21, and the bone cement injection hole 44 of the utility model; then the guide injection tube 2 is slid into the protective sleeve 7 until the shoulder 24 is against the top of the guide injection tube 2. At this time, the second hard tube 42 is exposed at the bottom end of the protective sleeve 7, and the support tube 3 is at the top end of the protective sleeve 7. When the left traction line 5 and the right traction line 6 are operated, the hose 43 will bend accordingly, thereby changing the direction of the bone cement injection hole 44 of the second hard tube 42. The guide injection tube 2 can be rotated so that the control tube 4 also rotates accordingly, and the direction of the bone cement injection hole 44 is further adjusted. The push rod 12 is inserted from the bone cement injection hole 31 of the support tube 3, and the push rod 12 pushes the bone cement in the tube to push the bone cement in the tube into the vertebral body. The length of the push rod 12 does not exceed the sum of the lengths of the support tube 3, the guide injection tube 2 and the first hard tube 41. After bone cement is injected at a certain position, the orientation of the bone cement ejection hole 44 is adjusted so that the bone cement is more evenly filled in the vertebral body, thereby improving the effect of bone cement in stabilizing the vertebral body.

[0075] Although the specific implementation methods of the present invention are described above, those skilled in the art should understand that the specific embodiments described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A controllable bone cement injector, characterized in that: include: A guide injection tube having a bone cement flow hole, a left guide wire hole and a right guide wire hole; A support tube having a bone cement injection hole, the bottom end of the support tube is fixedly connected to the top end of the guide injection tube, and the bone cement injection hole is communicated with the bone cement flow hole; The control tube comprises a first hard tube, a second hard tube and a soft tube, the top end of the first hard tube is fixedly connected to the bottom end of the guide injection tube, the bottom end of the first hard tube is fixedly connected to the top end of the soft tube, the bottom end of the soft tube is fixedly connected to the top end of the second hard tube, the second hard tube has a bone cement ejection hole, and the bone cement ejection hole is communicated with the bone cement flow hole; A left traction wire passes through the left wire hole, and the lower end of the left traction wire is fixedly connected to the left side surface of the second rigid tube; A right traction wire passes through the right wire hole, and the lower end of the right traction wire is fixedly connected to the right side surface of the second rigid tube; A protective sleeve, wherein the lumen of the protective sleeve is in clearance with the guide injection tube, the support tube is exposed at the top end of the protective sleeve, and the second hard tube is exposed at the bottom end of the protective sleeve.

2. A controllable bone cement injector according to claim 1, characterized in that: Also includes: A left horizontal axis, fixedly connected to the left side wall of the support tube; A right horizontal axis, fixedly connected to the right side wall of the support tube; The upper end of the left traction line is tied to the left horizontal axis, and the upper end of the right traction line is tied to the right horizontal axis.

3. A controllable bone cement injector according to claim 2, characterized in that: Also includes: A left adjusting wheel, wherein a central hole of the left adjusting wheel is rotationally connected to the left horizontal axis; A left knob, fixedly connected to the left adjusting wheel; A right adjusting wheel, wherein a center hole of the right adjusting wheel is rotationally connected to the right transverse axis; A right knob, fixedly connected to the right adjusting wheel; The upper end of the left traction line is wound around the left adjusting wheel, and the upper end of the right traction line is wound around the right adjusting wheel.

4. A controllable bone cement injector according to claim 3, characterized in that: Also includes: A left positioning pin, the left knob is provided with a plurality of circumferentially spaced left positioning holes, the left horizontal axis is provided with a left positioning slot, and the left positioning pin can pass through one of the left positioning holes and then be inserted into the left positioning slot; The right positioning pin, the right knob is provided with a plurality of right positioning holes arranged at intervals in a circumference, the right horizontal axis is provided with a right positioning groove, and the right positioning pin can pass through one of the right positioning holes and then be inserted into the right positioning groove.

5. The controllable bone cement injector according to claim 3, characterized in that: The top end of the guide injection tube is provided with a stop shoulder, and the stop shoulder can abut against the top end of the protective sleeve.

6. The controllable bone cement injector according to claim 1, characterized in that: The hose is a corrugated metal hose, and the first hard tube and the second hard tube are both metal hard tubes.

7. The controllable bone cement injector according to claim 1, characterized in that: Also includes: A handle is fixedly connected to the protective sleeve.

Images