CN102370516B - Sterile sleeve device applied to orthopedic external fixation needle - Google Patents

Abstract

The invention discloses a sterile cannula device applied to orthopedic external fixation needles, which is composed of a cannula and an external fixation needle. The sleeve is a tubular structure, mainly composed of a head sponge, a sleeve grip area, a sleeve spring area, a positioning piece, a tail cap, and a tail sponge. The sleeve spring area can be stretched, and one end of the sleeve spring area is the sleeve grip area, the head area of the sleeve pipe is close to the sleeve grip area, its diameter expands, and the head sponge is bonded inside. The other end of the spring area of the casing is threadedly connected with the tail cap, and the positioning piece is sleeved on the outer fixing pin. The exterior of the tail cap is bonded with a tail sponge. The device has the advantage of maintaining the sterility of the external fixation needle at the emergency scene.

Description

A sterile cannula device applied to orthopedic external fixation needles

technical field

The invention relates to the field of medical instruments, in particular to a sterile sleeve device applied to orthopedic external fixation needles.

Background technique

At present, external fixators have played an increasingly important role in orthopedic trauma first aid, because of their simple structure and not limited by fracture types and wounds, and at the same time, the fixation effect on fractures is significantly better than traditional equipment such as splints and plasters, so in It has outstanding advantages in field surgery, large-scale natural disasters and fracture first aid in serious traffic accidents. The core link of external fixator fixation is the accurate placement of external fixation needles. However, due to the dirty environment and poor air cleanliness at the emergency site, it is also impossible to sterilize related orthopedic equipment, and it is difficult to ensure the sterility of external fixation needles. Therefore, patients only Only when it can be delayed and sent to a clean operating room with complete equipment can it be possible to implement external fixator fixation, which greatly limits the first-line treatment efficiency of external fixator for fracture first aid.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the present invention provides a sterile cannula device applied to external fixation needles in orthopedics, so that the external fixation needles can maintain a sterile state at the emergency scene.

The technical solution of the present invention is: a sterile cannula device applied to external fixation needles in orthopedics, which consists of a cannula and an external fixation needle. The sleeve is a tubular structure, mainly composed of a head sponge, a sleeve grip area, a sleeve spring area, a positioning piece, a tail cap, and a tail sponge. The sleeve spring area can be stretched, and its minimum inner diameter is slightly larger than the inner diameter of the outer fixation pin. One end of the sleeve spring area is a sleeve gripping area, and its inner diameter is slightly larger than the diameter of the outer fixation pin. The holding area is adjacent, its diameter is expanded, and the head sponge is bonded inside. The other end of the casing spring area is threadedly connected with the tail cap. The tail cap is a cap-shaped structure with one end open and hollow in the middle. The inner surface of the side wall of the tail cap has internal threads, and there is a hole in the center of the bottom surface, and the hole diameter is slightly larger than that of the external fixation pin. There is a positioning piece inside the tail cap. The positioning piece is an elastic flat cylinder with a hole in the center. Its outer diameter is slightly smaller than the inner diameter of the tail cap but larger than the diameter of the tail end of the casing spring area. The diameter of the needle, the positioning piece is sleeved on the external fixation needle. The exterior of the tail cap is bonded with a tail sponge. The external fixation pin is an elongated cylindrical structure with a pointed end.

The interior of the head and tail sponges will contain disinfectant.

The cannula wraps the outer fixation needle in a series configuration, and the tip of the outer fixation needle is located in the gripping area of the cannula, and remains at this position before use.

The working principle of the device is: when in use, take out the cannula and external fixation pin as a whole from the aseptic package, inject disinfectant into the head sponge and tail sponge of the cannula, connect the tail of the external fixation pin to an orthopedic drill, and place the cannula The head is pressed against the skin entry point and the orthopedic drill is activated. The tip of the external fixation needle penetrates the sponge of the head, enters the body and bone tissue to complete the insertion of the external fixation needle, and the orthopedic drill is released. After the inspection confirms that the external fixation pin is in a good position, the cannula can be pulled out backwards, and the cannula can also be kept to protect the external fixation pin, and the nail tail is connected to the external fixator. Under the isolation protection of the cannula, the part where the external fixation needle enters the body is always in a sterile state. The external fixator, orthopedic drill and related orthopedic equipment are in the external environment, and the sterile state of the external fixation pin has no effect, and strict sterilization is not required.

The advantage that this invention has:

1. The use environment of external fixation needles has been expanded, and it is more suitable for first aid use in non-sterile conditions such as trauma first aid scene, field surgery, bedside of ward, emergency department, etc.;

2. The operation is simple, the structure is simple, and there is no strict requirement for the disinfection of drape, which saves the time and cost of equipment preparation, and has outstanding advantages in the first aid of fractures of a large number of patients.

Description of drawings

The figure is a structural schematic diagram of the present invention.

In the figure, 1 is a head sponge, 2 is a sleeve grip area, 3 is a sleeve spring area, 4 is a positioning piece, 5 is a tail cap, 6 is a tail sponge, and 7 is an external fixation pin.

Detailed ways

As shown in the figure, a sterile cannula device applied to orthopedic external fixation needles is composed of a cannula and an external fixation needle 7 . The sleeve is a tubular structure, mainly composed of a head sponge 1, a sleeve grip area 2, a sleeve spring area 3, a positioning piece 4, a tail cap 5, and a tail sponge 6. The sleeve spring area 3 can be stretched, and its minimum inner diameter is slightly larger than the inner diameter of the outer fixation pin 7. One end of the sleeve spring area 3 is the sleeve grip area 2, and its inner diameter is slightly larger than the diameter of the outer fixation pin 7. The head of the sleeve The upper area is adjacent to the gripping area 2 of the sleeve, and its diameter is expanded, and the head sponge 1 is bonded inside. The other end of the casing spring area 3 is threadedly connected with the tail cap 5, the tail cap 5 is a hat-shaped structure with one end open and the middle hollow, the inner surface of the side wall of the tail cap 5 has internal threads, and the center of the bottom surface has a hole with a diameter of approximately Greater than the diameter of the outer fixing pin 7, there is a positioning piece 4 inside the tail cap 5, and the positioning piece 4 is an elastic flat cylinder with a hole in its center, and its outer diameter is slightly smaller than the inner diameter of the tail cap 5 but larger than the sleeve spring area 3 The diameter of the tail end, its internal diameter is slightly smaller than the diameter of the outer fixation pin 7, and the spacer 4 is sleeved on the outer fixation pin 7. The outside of tail cap 5 is bonded with tail sponge 6.

The casing material is medical plastics, the main body is a spring design suitable for the depth of the external fixation needle 7, and the stretchable casing spring area 3 is adapted to the change of the length of the external part of the body when the external fixation needle 7 is drilled.

The cannula head has a cannula gripping area 2, which is convenient for clinicians to operate and is beneficial to control the axis of the external fixation needle 7.

There is a positioning piece 4 at the end of the sleeve. The positioning piece 4 is made of rubber and fastened to the rear of the outer fixation pin 7 by friction, which not only maintains the relative position of the sleeve and the outer fixation pin 7, but also allows the sleeve to rotate relatively and reduce torsion out of shape.

The sponge 1 at the head of the cannula can hold disinfectant, and when it is close to the skin, it can sterilize the skin and the external fixation needle 7, forming a sterile and sterile interface without dead ends; the sponge 6 at the tail can also hold disinfectant, improving the sealing and sterility of the cannula tail Wrap the outer fixation needle 7 with a sterile sleeve to keep the working area of the outer fixation needle 7 in a sterile state, and the inner diameter of the sleeve is adapted to the corresponding needle diameter.

The external fixation pin 7 is an elongated cylindrical structure with a pointed end at one end, and the external fixation pin 7 includes current commodity types such as various Kirschner wires, Steiner wires and half-pins for clinical use.

Claims (1)

1. be applied to a sterile sleeve device for orthopedic external fixation needle, it is characterized in that: it is made up of sleeve pipe and External fixation screw (7), described sleeve pipe is tubular structure, holds district (2), sleeve pipe spring region (3), spacer (4), tail cap (5), afterbody sponge (6) composition primarily of head sponge (1), sleeve pipe, described sleeve pipe spring region (3) can be stretched, its minimum diameter is slightly larger than External fixation screw (7) internal diameter, one end of sleeve pipe spring region (3) is that sleeve pipe holds district (2), its internal diameter is slightly larger than the diameter of External fixation screw (7), the head zone of sleeve pipe and sleeve pipe hold district (2) and are close to, its expanded in diameter, viscous has head sponge (1), the other end and the tail cap (5) of sleeve pipe spring region (3) are threaded connection, tail cap (5) is open at one end, the cap-like structure of central hollow, the side wall inner surface of tail cap (5) has internal thread, its bottom center is porose, aperture is slightly larger than the diameter of External fixation screw (7), there is spacer (4) tail cap (5) inside, spacer (4) is resilient oblate cylinder, its center is porose, its external diameter is slightly less than the internal diameter of tail cap (5) but is greater than the diameter of sleeve pipe spring region (3) tail end, its internal diameter is slightly less than the diameter of External fixation screw (7), spacer (4) is enclosed within External fixation screw (7), the outside of tail cap (5) is bonded with afterbody sponge (6).