CN110623722B - A device for removing the broken nail of the main intramedullary nail - Google Patents

Abstract

The invention provides a broken intramedullary nail main nail taking-out device, which belongs to the technical field of medical instruments and comprises a handle, a handle ejector rod, a handle pull sleeve, a connecting nut, a spring, an expansion pull rod, a thrust tube and an expansion tube, wherein the left end of the handle ejector rod is connected with the handle, the right end of the handle ejector rod extends into the handle pull sleeve, the rightmost ends of the handle ejector rod and the handle pull sleeve are aligned, the connecting nut is sleeved on the handle ejector rod and then connected with the left end of the handle pull sleeve, the spring is sleeved on the handle ejector rod and arranged in a space enclosed by the handle ejector rod and the handle pull sleeve, one end of the expansion pull rod is arranged inside the handle ejector rod, the other end of the expansion pull rod is arranged outside the handle ejector rod, the thrust tube is sleeved at one end outside the ejector rod, the expansion tube is sleeved at the right end of the expansion pull rod, and the left end of the expansion tube is contacted with the right end of the thrust tube. The invention can simply and safely take out the broken nail at the far end of the intramedullary nail on the basis of not increasing the surgical wound of a patient.

Description

A device for removing the broken nail of the main intramedullary nail

technical field

The invention belongs to the technical field of medical devices, and in particular relates to a device for taking out a broken main nail of an intramedullary nail.

Background technique

At this stage, femoral-tibial intramedullary nailing has become the gold standard for the treatment of lower extremity long shaft fractures. It will be very difficult to remove the distal end of the broken nail, and the removal of the broken nail often brings great damage to the patient, and will increase the surgical trauma to the patient.

SUMMARY OF THE INVENTION

In view of this, the present invention aims to provide a simple and practical device for removing the broken main nail of the intramedullary nail without adding additional trauma to the patient.

In order to achieve the above purpose, the technical scheme of the present invention is achieved as follows: a device for removing a broken main nail of an intramedullary nail, comprising a handle, a handle ejector, a handle pull sleeve, a connecting nut, a spring, an expansion rod, a thrust tube and an expansion rod. The left end of the handle top rod is connected to the handle, the right end of the handle top rod extends into the inside of the handle pull sleeve, and the rightmost ends of the two are aligned, and the connecting nut is sleeved on the top of the handle and then connected to the left end of the handle pull sleeve, the spring is sleeved on the handle top rod, and is arranged in the space enclosed by the handle top rod and the inside of the handle pull sleeve, the One end of the expansion rod is set inside the handle top rod, and the other end is set outside the handle top rod. The thrust tube is sleeved on the end of the expansion rod outside the handle top rod. At the right end of the expansion rod, while the left end of the expansion tube is in contact with the right end of the thrust tube;

The handle top rod comprises a connecting rod, a baffle plate and a chute, the baffle plate is arranged in the middle of the connecting rod, and the sliding slot is arranged at the right end of the connecting rod;

The handle pull sleeve includes a handle, a matching tube, a fixing hole, a first through hole, a second through hole and a third through hole, the handle is connected to the left end of the matching tube, the first through hole, The second through hole and the third through hole are arranged in the matching tube in sequence from left to right, and the fixing hole is arranged on the side wall of the matching tube;

The position space where the spring is located is the space enclosed by the baffle plate and the second through hole.

Further, the connection nut includes a portable hole and a nut body, and the portable hole is provided at the top of the nut body.

Further, the expansion rod includes a cylindrical head, a guide wire and an expansion head, the left end of the guide wire is connected with the cylindrical head, and the axes of the two are orthogonal, and the right end of the guide wire is connected with the expansion head, and the two axes coincide.

Further, the outer wall of the thrust tube is provided with several equally spaced incisions along both sides of the center line, and the positions of the upper incisions and the positions of the lower incisions are horizontally staggered.

Further, the expansion tube includes a tube body, four first incisions and four second incisions, the first incisions and the second incisions are both arranged on the sidewall of the tube body, and the two The slits are evenly distributed along the axis and circumferential direction of the pipe body, while the opening of the first slit is provided at the right end of the pipe body, and the opening of the second slit is provided at the left end of the pipe body.

Further, the included angle between the plane formed by the two oppositely disposed first incisions and the plane formed by the two oppositely disposed second incisions is 45 degrees.

Compared with the prior art, the device for removing the broken main nail of the intramedullary nail according to the present invention can simply and safely remove the broken nail at the distal end of the intramedullary nail without increasing the surgical trauma of the patient, without increasing the difficulty of the operation. and additional trauma to the patient.

Description of drawings

The accompanying drawings constituting a part of the present invention are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic structural diagram of a device for removing a broken main nail of an intramedullary nail according to an embodiment of the present invention;

Fig. 2 is the assembly schematic diagram of A part in Fig. 1;

3 is a schematic structural diagram of a handle ejector rod according to an embodiment of the present invention;

Fig. 4 is B-B schematic diagram in Fig. 3;

5 is a schematic structural diagram of a handle pull sleeve according to an embodiment of the present invention;

Fig. 6 is the C-C schematic diagram in Fig. 5;

7 is a schematic structural diagram of a connecting nut according to an embodiment of the present invention;

8 is a schematic structural diagram of an expansion rod according to an embodiment of the present invention;

9 is a schematic structural diagram of a thrust tube according to an embodiment of the present invention;

Fig. 10 is the structural representation of D part in Fig. 9;

11 is a schematic structural diagram of an expansion tube according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of E-E in FIG. 11 .

Description of reference numbers:

1. Handle; 2. Handle ejector rod; 3. Handle pull sleeve; 4. Connecting nut; 5. Spring; 6. Expansion rod; 7. Thrust tube; 8. Expansion tube; 9. Connecting rod; 10. Baffle plate; 11. Chute; 12. Handle; 13. Fitting tube; 14. Fixing hole; 15. First through hole; 16. Second through hole; 17, Third through hole; 18, Portable hole; 19, Nut body 20, cylindrical head; 21, guide wire; 22, expansion head; 23, tube body; 24, first incision; 25, second incision.

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

In the description of the present invention, it should be understood that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right", " The orientation or positional relationship indicated by vertical, horizontal, top, bottom, inner, outer, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and The description is simplified rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", etc., may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in Figures 1-12, the present invention is an intramedullary nail main nail broken nail removal device, including a handle 1, a handle push rod 2, a handle pull sleeve 3, a connecting nut 4, a spring 5, an expansion pull rod 6, a thrust force Tube 7 and expansion tube 8, the left end of the handle push rod 2 is connected with the handle 1, the right end of the handle push rod 2 extends into the inside of the handle pull sleeve 3, and the rightmost ends of the two are aligned, so The connecting nut 4 is sleeved on the handle ejector rod 2, and then connected with the left end of the handle pull sleeve 3, and the spring 5 is sleeved on the handle ejector rod 2, and is arranged between the handle ejector rod 2 and the handle ejector rod 2. In the space enclosed by the handle pull sleeve 3, one end of the expansion pull rod 6 is arranged inside the handle ejector bar 2, and the other end is arranged outside the handle ejector bar 2, and the thrust tubes are 7 sleeves. At the end of the expansion rod 6 located outside the handle top rod 2 , the expansion tube 8 is sleeved on the right end of the expansion rod 6 , and the left end of the expansion tube 8 is in contact with the right end of the thrust tube 7 . .

The handle top rod 2 includes a connecting rod 9 , a baffle 10 and a chute 11 , the baffle 10 is provided in the middle of the connecting rod 9 , and the chute 11 is set at the right end of the connecting rod 9 .

The handle pull sleeve 3 includes a handle 12 , a matching tube 13 , a fixing hole 14 , a first through hole 15 , a second through hole 16 and a third through hole 17 . The handle 12 is connected to the matching tube 13 . At the left end, the first through hole 15 , the second through hole 16 and the third through hole 17 are arranged in the matching tube 13 in order from left to right, and the fixing hole 14 is arranged in the on the side wall of the matching pipe 13 .

The space where the spring 5 is located is the space enclosed by the baffle 10 and the second through hole 16 .

The connection nut 4 includes a portable hole 18 and a nut body 19 , the portable hole 18 is provided at the top of the nut body 19 , and the presence of the portable hole 18 facilitates the installation or removal of the connection nut 4 .

The expansion rod 6 includes a cylindrical head 20, a guide wire 21 and an expansion head 22. The left end of the guide wire 21 is connected to the cylindrical head 20, and the axes of the two are orthogonal, and the right end of the guide wire 21 is connected to the cylindrical head 20. The expansion heads 22 are connected, and the axes of the two are coincident.

The outer wall of the thrust tube 7 is provided with several equally spaced incisions along both sides of the center line, and the position of the upper incision and the position of the lower incision are horizontally staggered. The existence of the incision makes the thrust tube 7 into an elastic piece, which is convenient Squeeze or bend.

The expansion tube 8 includes a tube body 23 , four first incisions 24 and four second incisions 25 , and the first incisions 24 and the second incisions 25 are both provided on the side wall of the tube body 23 . and the two are evenly distributed along the axis and circumferential direction of the tube body 23, while the opening of the first incision 24 is set at the right end of the tube body 23, and the opening of the second incision 25 is set at the right end of the tube body 23. The left end of the tube body 23, the first cutout 24 and the second cutout 25 are located at the two ends of the tube body 23, respectively, so that the expansion tube 8 becomes an elastic member, and the expansion tube can be realized. 8 radial expansion.

The included angle between the planes formed by the two oppositely disposed first incisions 24 and the planes formed by the two oppositely disposed second incisions 25 is 45 degrees, so that the expansion tube 8 is affected when radially expanding. Even force.

In the actual working process, first hold the device of the present invention so that the end including the expansion tube 8 enters the inner diameter of the broken nail, and then hold the handle 1 while holding the handle 12 with your fingers, so as to press the handle pull sleeve 3 , the handle pull sleeve 3 drives the expansion rod 6 to slide in the chute 11 of the handle top rod 2, so that the expansion head 22 of the expansion rod 6 enters the expansion tube 8, and the expansion tube 8 expands radially, thereby realizing the expansion of the broken nail Fastening, and finally the broken nails can be taken out by taking out the device of the present invention slowly.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (6)

1. An intramedullary nail main nail broken nail removal device, characterized in that: comprising a handle (1), a handle ejector (2), a handle pull sleeve (3), a connecting nut (4), a spring (5), an expansion A pull rod (6), a thrust pipe (7) and an expansion pipe (8), the left end of the handle top rod (2) is connected with the handle (1), and the right end of the handle top rod (2) extends into the Inside the handle pull sleeve (3), at the same time the rightmost ends of the two are aligned, the connecting nut (4) is sleeved on the handle top rod (2), and then connected with the left end of the handle pull sleeve (3), The spring (5) is sleeved on the handle top rod (2), and is arranged in the space enclosed by the handle top rod (2) and the inside of the handle pull sleeve (3), and the expansion pull rod (6) One end is arranged inside the handle ejector rod (2), the other end is arranged outside the handle ejector bar (2), and the thrust tube (7) is sleeved on the expansion rod (6) where the The outer end of the handle ejector rod (2), the expansion pipe (8) is sleeved on the right end of the expansion rod (6), and the left end of the expansion pipe (8) and the right end of the thrust pipe (7) are at the same time. contact; The handle top rod (2) includes a connecting rod (9), a baffle plate (10) and a chute (11), the baffle plate (10) is arranged in the middle of the connecting rod (9), and the chute (11) is arranged on the right end of the connecting rod (9); The handle pull sleeve (3) includes a handle (12), a matching tube (13), a fixing hole (14), a first through hole (15), a second through hole (16) and a third through hole (17) , the handle (12) is connected to the left end of the matching tube (13), the first through hole (15), the second through hole (16) and the third through hole (17) are in accordance with are arranged in the matching tube (13) in sequence from left to right, and the fixing holes (14) are arranged on the side wall of the matching tube (13); The position space where the spring (5) is located is the space enclosed by the baffle plate (10) and the second through hole (16). 2 . The device for removing the broken main nail of an intramedullary nail according to claim 1 , wherein the connecting nut ( 4 ) comprises a portable hole ( 18 ) and a nut body ( 19 ), and the portable hole ( 18) is arranged on the top end of the nut body (19). 3. The device for taking out a broken main nail of an intramedullary nail according to claim 1, wherein the expansion rod (6) comprises a cylindrical head (20), a guide wire (21) and an expansion head (22) , the left end of the guide wire (21) is connected with the cylindrical head (20), and the axes of the two are orthogonal, and the right end of the guide wire (21) is connected with the expansion head (22), and the axes of the two are connected coincide. 4. The device for taking out the broken main nail of the intramedullary nail according to claim 1, wherein a plurality of equally spaced incisions are arranged on the outer wall of the thrust tube (7) along both sides of the centerline, and The position of the upper incision is horizontally staggered from the position of the lower incision. 5. The device for removing the broken main nail of the intramedullary nail according to claim 1, wherein the expansion tube (8) comprises a tube body (23), four first incisions (24) and four a second incision (25), the first incision (24) and the second incision (25) are both disposed on the side wall of the pipe body (23), and both are along the pipe body respectively The axes of (23) are evenly distributed in the circumferential direction, while the opening of the first cutout (24) is provided at the right end of the tube body (23), and the opening of the second cutout (25) is set at the tube body The left end of (23). 6 . The device for taking out the broken nail of the main intramedullary nail according to claim 5 , wherein the plane formed by the two oppositely arranged first incisions ( 24 ) and the two oppositely arranged said first incisions ( 24 ) The included angle between the planes formed by the second cuts (25) is 45 degrees.

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