Device for the cerclage of a bone fracture

Abstract

The invention relates to a device (1) configured to carry out the process of cerclage of a bone fracture. Said device comprises: a) an arm (2) and an open hollow ring (3) connected to a telescopic arm (7) that guides the material used to fix the bone by cerclage.

Description

[0001] DEVICE FOR CERCLATING A BONE FRACTURE

[0002] FIELD OF INVENTION

[0003] The present invention pertains to the medical field. Specifically, the present invention relates to a device designed to more effectively perform the process of cerclage of a bone fracture with a thread, tape, wire, or cable.

[0004] STATE OF THE ART

[0005] In the context of the present invention, the term cerclage refers to a therapeutic procedure that consists of enclosing a fractured bone with a thread, tape, wire, or cable to promote its reduction. It is used in traumatology for the treatment of some long bone fractures, such as those of the femur, by surrounding the bone with a thread, tape, wire, or cable to hold the displaced fragments together.

[0006] Conventional devices for cerclage of a bone fracture typically have a 240° open circumference. This feature is necessary to insert and slide a thread, tape, wire, or cable pin around a bone. However, this opening also makes it difficult to access the pin's entry and exit holes. Bone cerclage is typically performed through a small, unilateral incision, making it difficult to access the device's holes and often requiring soft tissue manipulation to improve vision and access the device.

[0007] Therefore, there is an unmet medical need to design a device useful for cerclage of a bone fracture with a thread, tape, wire or cable, which allows the configuration of an open circumference around the bone during the cerclage process, facilitating the introduction and guidance of the thread, tape, wire or cable to be used during the process.

[0008] The present invention focuses on solving this technical problem and relates to an improved device configured to carry out the process of cerclage of a bone fracture with a thread, tape, wire or cable in a simpler and more effective manner.

[0009] DESCRIPTION OF THE INVENTION

[0010] Brief description of the invention

[0011] The present invention solves the technical problems indicated above by providing a device (1) comprising an open and hollow ring (3) connected to a telescopic arm (7) that is deployed as a result of the pressure exerted using a multi-articulated plunger (15).

[0012] Therefore, the surgeon would use the device (1) of the invention to introduce and guide the thread, tape, wire or cable around the bone. Initially, the device (1) would be introduced through the incision keeping the telescopic arm (7) unextended. Once introduced, the surgeon can extend the telescopic arm (7) by pressing it by using a plunger (15). Therefore, this system, through the telescopic arm (7), allows the usual circumference to be closed up to 31 I o, which facilitates the insertion and removal of the thread, tape, wire or cable through the holes in the device, thus minimizing the need to use metal separators on the soft parts.

[0013] The ease of insertion and removal of the thread, tape, wire or cable within the device (1) of the invention with the telescopic arm (7) translates into a shorter surgical time and everything that derives from it (less intraoperative bleeding, less manipulation of soft tissues, less risk of infection).

[0014] Preferably, the device (1) of the invention is characterized by having an adequate friction or sliding profile to allow the correct functioning of the assembled parts. In addition, the interior of the open and hollow ring (3) and of the telescopic arm (7) must allow the introduction and sliding of a thread, tape, wire or cable inside. In addition, the device (1) must be manufactured with a sterilizable and, preferably, heat-resistant material in order to be able to undergo pre-surgical sterilization processes. Furthermore, the material must be mechanically strong and resistant to be able to be subjected to leverage and rotation forces to which it will be subjected during its normal use in the surgical field.

[0015] By way of example, the device of the invention can be manufactured using any material, such as resin or surgical stainless steel, that meets the conditions explained above.

[0016] Description of the figures

[0017] The device of the invention is illustrated more specifically in the Figures, where the following technical characteristics have been reflected according to the following numbering:

[0018] Figure 1. Generic view of the device of the invention (1) showing the arm of the device (2), the open and hollow ring of the device (3), the outlet mouth (4) of the telescopic arm (7), the inlet mouth (5) of the thread, tape, wire or cable and of the articulated plunger (15), the telescopic arm of the device (7) and the outlet mouth (9) of the articulated plunger (15).

[0019] Figure 2. Generic view of the device (1) showing the arm of the device (2), the open and hollow ring of the device (3), the outlet mouth (4) of the telescopic arm (7), the inlet mouth (5) of the thread, tape, wire or cable and of the articulated plunger (15), the retaining projections (6) present in the open and hollow ring of the device (3), the telescopic arm of the device (7) and the outlet mouth (9) of the articulated plunger (15).

[0020] Figure 3. View of the open and hollow ring of the device (3), the hollow duct (8) of the ring (3) and the sliding rail (8') of the telescopic arm (7) inside the open and hollow ring of the device (3).

[0021] Figure 4. View of the device arm (2), the open and hollow ring of the device (3) and the retaining projections (6) present in the open and hollow ring of the device (3).

[0022] Figure 5. View of the open and hollow ring of the device (3), of the outlet mouth (4) of the telescopic arm (7), of the inlet mouth (5) of the thread, tape, wire or cable and of the articulated plunger (15), of the retaining projections (6) present in the open and hollow ring of the device (3), of the telescopic arm of the device (7), of the hollow conduit of the ring (8), of the outlet mouth (9) of the articulated plunger (15), of the safety projection (10) of the telescopic arm (7) that fits into the retaining projections (6) present in the open and hollow ring of the device (3) and of the inlet (14) of the thread, tape, wire or cable.

[0023] Figure 6. View of the open and hollow ring of the device (3) and the telescopic arm of the device (7).

[0024] Figure 7. View of the device of the invention showing the arm of the device (2), the open and hollow ring of the device (3), the outlet mouth (4) of the telescopic arm (7), the inlet mouth (5) of the thread, tape, wire or cable and of the articulated plunger (15), the retaining projections (6) present in the open and hollow ring of the device (3), the telescopic arm of the device (7) and the outlet mouth (9) of the articulated plunger (15).

[0025] Figure 8. View of the open and hollow ring of the device (3), the retaining projections (6) present in the open and hollow ring of the device (3), the telescopic arm of the device (7), the hollow conduit (8) of the ring (3), the sliding rail (8') of the telescopic arm (7) inside the open and hollow of the device (3), the safety projection (10) of the telescopic arm (7) that fits into the retaining projections (6) present in the open and hollow ring of the device (3), the safety strap (11) of the telescopic arm (7), the projection (12) of the telescopic arm (7) to slide along the sliding rail (8') present in the open and hollow ring (3), the stop (13) of the telescopic arm of the device (7) and the inlet (14) of the thread, tape, wire or cable.

[0026] Figure 9. A) View of the telescopic arm of the device (7), the outlet mouth (9) of the articulated plunger (15), the safety projection (10) of the telescopic arm (7) that fits into the retaining projections (6) present in the open and hollow ring of the device (3) and the safety strap (11) of the telescopic arm (7). B) View of the telescopic arm of the device (7), the outlet mouth (9) of the articulated plunger (15), the safety projection (10) of the telescopic arm (7) that fits into the retaining projections (6) present in the open and hollow ring of the device (3), the safety strap (11) of the telescopic arm (7), the projection (12) of the telescopic arm (7) to slide along the sliding rail (8') present in the open and hollow ring (3) and the inlet (14) of the thread, tape, wire or cable into the telescopic arm (7).

[0027] Figure 10. View of the safety projection (10) of the telescopic arm (7) that fits into the retention projections present in the open and hollow ring of the device (3), the safety strap (11) of the telescopic arm (7), the projection (12) of the telescopic arm (7) to slide along the sliding rail (8') present in the open and hollow ring (3) and the inlet (14) of the thread, tape, wire or cable in the telescopic arm (7).

[0028] Figure 11. View of the articulated plunger (15) showing the fixed arm (16) of the articulated plunger (15), the articulated sectors (17), the extension of the joint (17') of the articulated plunger (15), the end (18) of the articulated area of ​​the plunger (15) and the axis of rotation (19) of the joint of the articulated plunger (15).

[0029] Figure 12. Top view of the articulated plunger (15) showing the fixed arm (16) of the articulated plunger (15) and the articulated sectors (17).

[0030] Figure 13. View of the articulated plunger (15) showing the articulated sectors (17), the extension of the joint of the articulated plunger (15), the opening (17") to receive the extension of the joint (17) of the articulated plunger (15), the end (18) of the articulated area of ​​the plunger (15) and the axis of rotation (19) of the joint of the articulated plunger (15).

[0031] Figure 14. View of the fixed arm (16) of the articulated plunger (15), the articulated sectors (17), the end (18) of the articulated area of ​​the plunger (15) and the axis of rotation (19) of the joint of the articulated plunger (15).

[0032] Figure 15. View of the articulated plunger (15), the fixed arm (16) of the articulated plunger (15), the articulated sectors (17), the extension of the joint (17) of the articulated plunger (15), the opening (17") to receive the extension of the joint of the articulated plunger (15), the end (18) of the articulated area of ​​the plunger (15) and the axis of rotation (19) of the joint of the articulated plunger (15).

[0033] Detailed description of the invention

[0034] Therefore, the first aspect of the present invention refers to a device (1) configured to carry out the process of cerclage of a bone fracture with a thread, tape, wire or cable comprising: a) an arm (2) and b) an open and hollow ring (3) connected to a telescopic arm (7) that serves as a guide for the thread, tape, wire or cable used to cerclage the bone, characterized in that the open and hollow ring (3) has an inlet (5) for the thread, tape, wire or cable used to cerclage the bone and for the articulated plunger (15) that activates the telescopic arm (7) by pressure, and an outlet (4) for the telescopic arm (7).

[0035] In a preferred aspect of the invention, the open and hollow ring (3) has retention projections (6) where the safety projections (10) of the telescopic arm (7) fit.

[0036] In a preferred aspect of the invention, the open and hollow ring (3) has a hollow conduit (8) that houses the telescopic arm (7) and receives the articulated piston (15).

[0037] In a preferred aspect of the invention, the open and hollow ring (3) has a sliding rail (8') to allow the telescopic arm (7) to slide inside the open and hollow ring (3) when pushed by the action of the articulated plunger (15).

[0038] In a preferred aspect of the invention, the telescopic arm (7) has an outlet (9) for the articulated plunger (15). In a preferred aspect of the invention, the telescopic arm (7) has a safety projection (10) that fits into the retention projections (6) present in the open and hollow ring (3), a safety strap (11), a projection (12) for sliding along the sliding rail (8') of the open and hollow ring (3), a stop (13) and an inlet mouth for the thread, tape, wire or cable (14). In a preferred aspect of the invention, the articulated plunger (15) has a fixed arm (16), articulated sectors (17), axes of rotation of the joint (19) and a rounded end of the articulated area of ​​the plunger (18).

[0039] In a preferred aspect of the invention, the articulated sectors (17) of the articulated plunger (15) comprise extensions of the articulation (17) and an opening to receive the extension of the articulation of the articulated plunger (17').

[0040] The present invention further relates to an articulated plunger (15) configured to actuate by pressure the telescopic arm (7) of the device (1) comprising a fixed arm (16), articulated sectors (17), joint rotation axes (19) and a rounded end of the articulated area of ​​the plunger (18). In a preferred aspect of the invention, the articulated plunger (15) is characterized in that the articulated sectors (17) of the articulated plunger (15) comprise extensions of the joint (17) and an opening to receive the extension of the joint of the articulated plunger (17").

Claims

CLAIMS 1. Device (1) configured to carry out the process of cerclage of a bone fracture with a thread, tape, wire or cable comprising: a. An arm (2) and b. An open and hollow ring (3) connected to a telescopic arm (7) that serves as a guide for the thread, tape, wire or cable used to surround the bone, characterized in that the open and hollow ring (3) has an input mouth (5) of the thread, tape, wire or cable used to surround the bone and of the articulated plunger (15) that activates the telescopic arm (7) by pressure, and an output mouth (4) of the telescopic arm (7).

2. Device (1) according to claim 1, wherein the open and hollow ring (3) has retention projections (6) where the safety projections (10) of the telescopic arm (7) fit.

3. Device (1) according to any of the preceding claims, characterized in that the open and hollow ring (3) has a hollow duct (8) that houses the telescopic arm (7) and receives the articulated piston (15).

4. Device (1) according to any of the preceding claims, characterized in that the open and hollow ring (3) has a sliding rail (8') to allow the telescopic arm (7) to slide inside the open and hollow ring (3) when it is pushed by the action of the articulated piston (15).

5. Device (1) according to any of the preceding claims, characterized in that the telescopic arm (7) has an outlet (9) of the articulated piston (15).

6. Device (1) according to any of the preceding claims, characterized in that the telescopic arm (7) has a safety projection (10) that fits into the retention projections (6) present in the open and hollow ring (3), a safety strap (11), a projection (12) to slide along the sliding rail (8') of the open and hollow ring (3), a stop (13) and an entry mouth for the thread, tape, wire or cable (14).

7. Device (1) according to any of the preceding claims, characterized in that the articulated plunger (15) has a fixed arm (16), articulated sectors (17), axes of rotation of the joint (19) and a rounded end of the articulated area of ​​the plunger (18).

8. Device (1) according to any of the preceding claims, characterized in that the articulated sectors (17) of the articulated plunger (15) comprise extensions of the joint (17) and an opening to receive the extension of the joint of the articulated plunger (17”).

9. Articulated plunger (15) configured to actuate by pressure the telescopic arm (7) of the device (1) comprising a fixed arm (16), articulated sectors (17), axes of rotation of the joint (19) and a rounded end of the articulated area of ​​the plunger (18).

10. Articulated plunger (15), according to claim 9, characterized in that the articulated sectors (17) of the articulated plunger (15) comprises extensions of the joint (17) and an opening to receive the extension of the joint of the articulated plunger (17”).

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