CN103876822B - Medical minimally-invasive broken screw taking-out device - Google Patents

Abstract

The invention relates to a medical minimally invasive broken nail removal device, comprising: a first handle and a second handle, the middle part of the first handle and the middle part of the second handle are movably connected by a rotating shaft; the first handle and the second A locking device is movably arranged between the same ends of the handle, and a plurality of anti-slip tooth grooves are arranged on the inner side of the other end. The invention can conveniently unscrew the screw in the bone, so that the bone damage around the screw can be minimized. At the same time, the medical minimally invasive broken nail removal device has a locking function, the locking device can be disassembled, and has strong practicability.

Description

A medical minimally invasive device for removing broken nails

technical field

The invention belongs to the field of medical devices, and in particular relates to a medical minimally invasive device for removing broken nails.

Background technique

After internal fixation of extremity fractures with plates and screws, due to the high stress between the plates and screws, long-term retention in the body often leads to breakage at the contact between the tail of the screws and the plates. It is difficult to remove the broken screw. At present, it is usually necessary to remove a large amount of bone around the broken screw in clinical practice, and use tools such as rongeurs to remove the screw. This method is more serious to bone destruction, and local refracture may occur after operation. At present, there is no medical minimally invasive broken nail removal tool that can conveniently take out the broken nail and can destroy the bone at least.

Contents of the invention

The invention provides a medical minimally invasive device for removing broken nails, which aims to solve the problem of difficulty in taking out broken nails and at the same time solve the problem of serious bone destruction during the process of taking out broken nails.

The invention can conveniently unscrew the broken bone nail, and can minimize bone damage around the broken nail. At the same time, the medical minimally invasive broken nail removal device has a locking function, the locking device can be disassembled, and has strong practicability.

Description of drawings

Fig. 1 is a structural diagram of the present invention;

Fig. 2 is the use state figure of the present invention;

Fig. 3 is the A direction view of Fig. 1;

Fig. 4 is a cross-sectional view along B-B direction in Fig. 1 .

The serial numbers and their corresponding names in the figure are:

1. The first handle; 11. The first through hole; 2. The second handle; 21. The second through hole; 3. Locking device; 31. Locking screw; 32. Nut; 33. Washer; 34. Butterfly Nut; 4, rotating shaft.

detailed description

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

A device for taking out medical minimally invasive broken nails, comprising: a first handle and a second handle, the middle part of the first handle and the middle part of the second handle are movably connected through a rotating shaft; A locking device is movable between the ends, and a number of anti-slip tooth grooves are arranged on the inner side of the other end.

Specifically, referring to FIG. 1 , the rotating shaft 4 is arranged in the middle of the first handle 1 and the second handle 2 and connects the first handle 1 and the second handle 2 . The first handle 1 and the second handle 2 take the rotating shaft 4 as the center of rotation, and can be opened and closed in a plane, so as to achieve the purpose of clamping broken nails by the take-out device. Specifically, the rotating shaft 4 can be a pin or other rods. The locking device 3 is arranged between the same side of the first handle 1 and the second handle 2 . The first handle 1 is provided with a first through hole 11 , the second handle 2 is provided with a second through hole 21 , and the locking device 3 is disposed between the first through hole 11 and the second through hole 21 .

Specifically, the locking device 3 includes a locking screw 31 , a nut 32 , a washer 33 and a wing nut 34 . The locking screw 31 passes through the first through hole 11 and the second through hole 21 . The nut 32 is set on the locking screw 31 and is located on the inner end surface of the first handle 1 ; the washer 33 is also set on the locking screw 31 and is located on the outer end surface of the second handle 2 . Wing nut 34 is sleeved on the end of locking screw rod 31, and meanwhile, it is pressed tightly on washer 33. The function of the washer 33 is to prevent the second handle 2 from being damaged by the wing nut 34 during the operation of the medical minimally invasive broken nail removal device.

Referring to FIG. 4 , in this embodiment, the section of the locking screw 31 is oblate.

Referring to Fig. 2, Fig. 2 is an open state diagram of the medical minimally invasive broken nail removal device mentioned in the present invention. The diameter of the second through hole 21 is larger than the cross-sectional diameter of the locking screw 31, and the advantage of this design is that the locking device 3 can swing left and right. That is to say, the large diameter of the second through hole 21 provides space for the left and right movement of the locking device 3 . When the locking screw 31 is swung left and right, the locking device 3 drives the first handle 1 to rotate relative to the second handle 2 with the rotating shaft 4, thereby realizing the clamping and loosening functions of the medical minimally invasive broken nail removal device.

Referring to FIG. 1 and FIG. 3 , the insides of the front ends of the first handle 1 and the second handle 2 are both provided with a number of anti-slip tooth grooves. The cross-sections of the front ends of the first handle 1 and the second handle 2 constitute a circular shape as a whole. The cross section of the front end of the first handle 1 forms an upper semicircle, and the cross section of the front end of the second handle 2 forms a lower semicircle. The inner sides of the front ends of the first handle 1 and the second handle 2 are symmetrically provided with two rows of anti-slip tooth grooves, and the two rows of anti-skid tooth grooves are arranged in an arched shape. The purpose of setting the anti-slip tooth groove is: since the screw to be pulled out and the anti-slip tooth groove are all metal, the friction coefficient is small. Alveolar, improving the effect of opening and pulling.

The invention can conveniently pull out the screw or broken nail stuck in the bone, and can minimize the bone damage near the screw in the bone. At the same time, the medical minimally invasive broken nail removal device has a locking function. It can be disassembled and has strong practicability.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention .

Claims (3)

1. a kind of medical minimally invasive broken nail withdrawing device it is characterised in that: include: first handle and second handle, It is flexibly connected by a rotating shaft in the middle part of described first handle and in the middle part of described second handle；Described first handle and It is movably set with locking device, other end tip inside is provided with some anti-between same one end of second handle Slip teeth groove, described anti-skidding teeth groove is in triangular shape；Same one end of described first handle and described second handle is respectively It is provided with first through hole and the second through hole；Described locking device is by described first through hole and described second through hole It is movably arranged between described first handle and described second handle；Described locking device includes: tie down screw, Nut, plain cushion and wing nut；Described tie down screw passes through described first through hole and described second through hole；Institute State nut to pass through described tie down screw and be arranged on the inner side end of described first handle；Described plain cushion is set in Described tie down screw and be arranged on second handle end face outside；Described wing nut is arranged on described tie down screw Outer end and be attached on described plain cushion；The section of described tie down screw is in oblate shape；Described second through hole Overall diameter with diameter greater than described tie down screw.

2. as claimed in claim 1 medical minimally invasive broken nail withdrawing device it is characterised in that: described first-hand The section of the end being provided with some anti-skidding teeth groove of handle and second handle is respectively the semicircle of two same specifications Shape；Described some anti-skidding teeth groove are arranged on described semicircular inner side.

3. as claimed in claim 2 medical minimally invasive broken nail withdrawing device it is characterised in that: described in each The domed distribution of some anti-skidding teeth groove of semicircular section.