PFNA operation special upper limb fixing device

Abstract

The utility model relates to medical instrument technical field, specifically disclose a PFNA operation special upper limb fixing device, include: forearm fixed part, the forearm fixed part includes two fit sections, one end of two fit sections is fixedly connected and forms elbow positioning area, and the other end forms wrist positioning area, connecting band, the connecting band is along the outside ring of wrist positioning area and is equipped, ring buckle, the ring buckle sets up on connecting band, neck part holds up subassembly, the bandage of wrist positioning area outside can along operating bed side guide rail sliding and realizes the second level regulation through the lock of daughter buckle and female buckle, under the premise of ensuring C type arm machine's intraoperative perspective passage unobstructed, limit the clearheaded patient to lift the arm, the soft pad of fit section inside adds and absorbs the point pressure and disperses shear force in the process of tightening and intraoperative micro-motion, significantly reduce the risk of nerve compression, realize the comprehensive technical effect of upper limb stable fixing position, weight even transfer, fast fine adjustment and high comfort degree coexist as a whole.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an upper limb fixation device for PFNA surgery. Background Technology

[0002] Current PFNA (proximal femoral nail antirotation) surgeries commonly employ simple upper limb suspension or restraint methods: Medical staff first wrap the affected forearm one or two times with cotton or polyester-cotton bandages, tying a knot at the elbow or wrist, and then leading the bandage behind the patient's neck or onto the headboard of the traction bed. The bandage is then suspended or secured using metal hooks or IV stands on the side of the traction bed. Another common practice is to add a soft strap to the headboard, suspending the forearm below it with loops or Velcro fasteners to prevent upper limb slippage during femoral traction and C-arm fluoroscopy. These devices are simple in structure and inexpensive, relying solely on the tension and friction of the bandages themselves to maintain the forearm's position during surgery, and are widely used in orthopedic traction tables or ordinary operating room settings.

[0003] However, these traditional methods have revealed several shortcomings in clinical use: the weight of the upper limb is mainly concentrated on a single strap or a single hook, which can easily create a high-pressure zone at the neck, back, or head frame contact point, causing skin indentations, soft tissue pain, or even compression of the radial and ulnar nerves; the length and tension of the straps are usually adjusted by knotting or simple hooks, which is time-consuming and makes it difficult to quickly adapt to different body types or changes in intraoperative positioning; the wrist lacks coordinated restraint with the side rails of the operating table, and conscious patients may unconsciously raise their arms during surgery, causing deviations in the traction angle or affecting intraoperative fluoroscopy of the C-arm machine; in addition, if it is necessary to immediately release the upper limb restraints in an emergency, the straps must be cut or the knots untied layer by layer, which poses a risk of operation delay and secondary traction. These problems all restrict the safety and efficiency of the surgical procedure. Utility Model Content

[0004] The purpose of this invention is to provide an upper limb fixation device specifically for PFNA surgery to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a PFNA surgical upper limb fixation device, comprising: a forearm fixation part, the forearm fixation part including two fitting sections, one end of the two fitting sections being fixedly connected to form an elbow positioning area, and the other end forming a wrist positioning area; a connecting strap, the connecting strap being arranged around the outside of the wrist positioning area; a buckle, the buckle being disposed on the connecting strap; and a neck support component, one end of the neck support component being fixedly connected to the elbow positioning area and detachably overlapped with the buckle.

[0006] In one feasible embodiment, the neck support assembly includes: a support strap, the fixed end of which is connected to the elbow positioning area, and the free end which passes through a buckle and is detachably overlapped with itself; a closed force loop is formed between the support strap and the forearm fixation part, the closed force loop being used to circumferentially distribute the weight of the affected upper limb to the neck and shoulder area, reduce local pressure and balance the force on the cervical spine; and a flexible buffer layer 7, which is disposed on the inner side of the support strap, the flexible buffer layer 7 being used to support the cervical spine and distribute cervical spine pressure.

[0007] In one feasible implementation, the support strap is provided with Velcro along its length, and the length of the support strap can be quickly adjusted and detachably connected through the cooperation of the Velcro.

[0008] In one feasible implementation, the wrist positioning area is detachably connected to the side of the operating table via a strap and slides along the side guide rail of the operating table to restrict the conscious patient from raising the affected upper limb.

[0009] In one feasible implementation, the strap is provided with a plurality of male buckles and female buckles. The female buckles are fixed to the fixed end of the strap, and the male buckles are provided at the free end of the strap. The strap length can be quickly adjusted and detachably connected by the insertion and engagement of the male buckles and female buckles.

[0010] In one feasible implementation, the inner sides of both of the fitting segments are provided with padding to reduce the risk of nerve compression.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This device forms an encircling fulcrum in the elbow positioning area and a circumferential tightening area in the wrist positioning area through two fitting sections. Subsequently, the connecting strap on the outside of the fitting section wraps around the wrist positioning area to bear part of the circumferential stress and introduces the load into the neck support component with the help of the buckle. The closed force circuit formed by the support strap and the elbow positioning area disperses the remaining weight circumferentially to the neck and shoulder. The flexible buffer layer 7 deforms instantaneously with the curvature of the cervical spine to amplify the force area, weaken the peak pressure and maintain the left and right force balance. At the same time, the strap on the outside of the wrist positioning area can slide along the side guide rail of the operating table and achieve second-level tension adjustment by locking the male and female buckles. Under the premise of ensuring the unobstructed intraoperative fluoroscopic channel of the C-arm machine, it restricts the conscious patient from raising their arm. The soft pad added on the inside of the fitting section continuously absorbs point pressure and disperses shear force during tightening and intraoperative micro-movement, significantly reducing the risk of nerve compression. The overall device achieves a comprehensive technical effect of stable upper limb positioning, uniform weight transfer, rapid micro-adjustment and high comfort. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of the present invention from a first angle;

[0013] Figure 2This is a structural schematic diagram of the present invention from a second angle;

[0014] Figure 3 This is a structural schematic diagram of the present invention from a third angle.

[0015] In the diagram: 1. Forearm fixation part, 2. Connecting strap, 3. Buckle, 4. Support strap, 5. Velcro, 6. Strap, 7. Flexible buffer layer. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1 to 3 This utility model provides a technical solution: a PFNA surgical upper limb fixation device, comprising: a forearm fixation part 1, a connecting strap 2, a buckle 3, and a neck support component. The forearm fixation part 1 includes two fitting sections, one end of which is fixedly connected to form an elbow positioning area, and the other end forms a wrist positioning area. The connecting strap 2 is arranged around the outside of the wrist positioning area. The buckle 3 is disposed on the connecting strap 2. One end of the neck support component is fixedly connected to the elbow positioning area and is detachably overlapped with the buckle 3.

[0018] It should be noted that during use, the patient's forearm is first positioned completely between the two fitting sections, with the elbow positioning area fitting against the patient's elbow and the wrist positioning area fitting against the patient's wrist, thus completing the circumferential positioning of the forearm; then, the free end of the neck support component is passed along the back of the patient's neck and detachably overlapped with the buckle 3, so that a continuous closed force circuit is formed between the neck support component and the elbow positioning area. Thus, when the affected upper limb hangs naturally, the load generated by the wrist is sequentially transferred to the elbow positioning area through the connecting strap 2 and further distributed to the neck and shoulder, achieving weight distribution and upper limb elevation restriction, and maintaining intraoperative positional stability.

[0019] In some examples, the neck support component further includes: a support strap 4 and a flexible buffer layer 7. The fixed end of the support strap 4 is connected to the elbow positioning area, and the free end passes through the buckle 3 and is detachably overlapped with itself. A closed force loop is formed between the support strap 4 and the forearm fixation part 1. The closed force loop is used to distribute the weight of the affected upper limb circumferentially to the neck and shoulder, reduce local pressure and balance the force on the cervical spine. The flexible buffer layer 7 is disposed on the inner side of the support strap 4. The flexible buffer layer 7 is used to support the cervical spine and distribute the pressure on the cervical spine.

[0020] It should be noted that during installation, the fixed end of the support strap 4 is first reliably connected to the elbow positioning area. Then, the support strap 4 is wrapped around the back of the neck, and its free end passes through the buckle 3 and is folded back to detachably overlap itself. The closed force circuit is established by adjusting the tension. The weight of the upper limb is transmitted from the forearm fixing part 1 to this force circuit and then evenly distributed to the neck and shoulder by the support strap 4. The flexible buffer layer 7 on the inner side of the support strap 4 supports the neck, thereby preventing cervical discomfort caused by the neck being suspended during surgery. Thus, support is achieved during continuous surgery while taking into account weight distribution and wearing comfort. The width of the support strap 4 can be widened according to the actual situation to meet the actual use needs.

[0021] In some examples, the support band 4 is further equipped with Velcro 5 along its length, allowing for quick adjustment and detachable connection of the support band 4's length. During operation, medical personnel first wrap the support band 4 around the target area and adjust the overlap length according to the patient's body shape. Then, the hook side of the Velcro 5 at the free end of the support band 4 is aligned with the corresponding rough side of the Velcro 5 on the outer side of the band. Pressing the Velcro 5 instantly locks the band in place. For minor adjustments, simply lift the attached Velcro 5, slide the support band 4 back and forth to change its effective loop length, and then re-attach it to re-secure it. Removal is achieved by simply lifting the Velcro 5, releasing all adhesions at once. This allows for quick assembly and disassembly, and multiple reuses, all without tools and taking only a few seconds.

[0022] In some examples, the wrist positioning zone is further detachably connected to the side of the operating table via a strap 6, and slides along the side rail of the operating table to restrict conscious patients from raising their affected upper limb. In use, medical staff first wrap the wrist positioning zone around the patient's wrist and tighten it as necessary; then, the distal end of the strap 6 is led to the side of the operating table and detachably connected to the side rail; before the connection is complete, the strap 6 can be slid back and forth along the rail to allow the wrist positioning zone to achieve a suitable position and tension in the horizontal plane, until a state is reached that both inhibits the patient from actively raising their arm and does not restrict intraoperative fine-tuning is achieved. Throughout the process, the operating table remains stable while the patient's upper limb is effectively restricted.

[0023] In some examples, the strap 6 is further equipped with several female and male buckles. The female buckle is fixed to the fixed end of the strap 6, and the female buckle is located at the free end of the strap 6. The length of the strap 6 can be quickly adjusted and detached by the insertion and engagement of the female and male buckles. During operation, medical staff first hold the free end of the strap 6 and pass it through the guide rail on the side of the operating table. Then, they select any female buckle arranged at a preset interval and insert it into the corresponding position of the female buckle on the fixed end to lock it. If it is necessary to shorten or loosen the strap 6, simply press the unlocking spring on the side of the female buckle to instantly disengage it from the female buckle. Then, move the free end of the strap 6 forward or backward, select a new combination of female and male buckles, and re-insert it to complete the length fine adjustment within a few seconds. To remove it, simply press the locked female buckle spring and pull out the free end. The strap 6 will then be released as a whole, achieving quick disassembly and reassembly without affecting reuse.

[0024] In some examples, the inner sides of both fitting segments are further padded to reduce the risk of nerve compression. When worn, the two fitting segments are attached to the palmar and dorsal sides of the patient's forearm, respectively. The inner padded segments reduce local pressure on superficial nerves in the forearm; provide stable cushioning during prolonged surgical positions, preventing numbness and pressure marks; and upon removal, the tension on the fitting segments is released, and the padded segments quickly spring back to their initial thickness, avoiding pulling on the skin during removal and improving overall comfort and safety.

[0025] This fixation device can replace traditional drape suspension in cases where a radial external fixator has been placed and a second femoral intramedullary nailing (PFNA) surgery is required on the same side. Through a closed force circuit formed by connecting straps 2 and support straps 4, the weight of the upper limb is evenly distributed circumferentially to the neck and shoulder, preventing secondary compression of the external fixation pin tract and soft tissue. The wrist positioning area is quickly locked to the operating table side rail via a sliding strap 6, ensuring stable upper limb positioning and allowing for fine-tuning at any time, preventing the risk of falling due to loose drapes or poor knotting. The male and female buckles or Velcro 5 support minute tension adjustment and one-button release, meeting the needs of intraoperative fluoroscopy, debridement, repositioning, and emergency treatment. The flexible buffer layer 7 and inner soft pad continuously absorb shear force and reduce local pressure, significantly alleviating pressure on surrounding nerves and blood vessels and reducing pain and discomfort. Therefore, while ensuring safety, comfort, and operational efficiency, it provides a more reliable upper limb fixation solution for ipsilateral dual-site surgery.

[0026] In the description of this utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," and "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. At the same time, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "fixed installation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction relationship between two elements. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A PFNA surgical upper limb fixation device, characterized in that, include: The forearm fixing part includes two fitting sections, one end of which is fixedly connected to form an elbow positioning area, and the other end forms a wrist positioning area. A connecting strap is provided around the outer side of the wrist positioning area; A buckle, wherein the buckle is disposed on the connecting strip; A neck support assembly, one end of which is fixedly connected to the elbow positioning area and is detachably overlapped with a buckle.

2. The upper limb fixation device for PFNA surgery according to claim 1, characterized in that: The neck support component includes: The support strap has a fixed end connected to the elbow positioning area and a free end that passes through a buckle and is detachably connected to itself. The support strap and the forearm fixation part form a closed force circuit, which is used to distribute the weight of the affected upper limb circumferentially to the neck and shoulder area, reduce local pressure and balance the force on the cervical spine. A flexible buffer layer is disposed on the inner side of the support belt, which is used to support the cervical spine and distribute cervical spine pressure.

3. The upper limb fixation device for PFNA surgery according to claim 2, characterized in that: The support strap is provided with Velcro along its length, which allows for quick adjustment and detachable connection of the support strap length.

4. The upper limb fixation device for PFNA surgery according to claim 1, characterized in that: The wrist positioning area is detachably connected to the side of the operating table via a strap and slides along the side guide rail of the operating table to restrict conscious patients from raising the affected upper limb.

5. The upper limb fixation device for PFNA surgery according to claim 4, characterized in that: The strap is provided with several male and female buckles. The female buckle is fixed to the fixed end of the strap, and the male buckle is set at the free end of the strap. The strap length can be quickly adjusted and detached by the insertion and cooperation of the male and female buckles.

6. The upper limb fixation device for PFNA surgery according to claim 1, characterized in that: Both of the fitting sections have pads on their inner sides to reduce the risk of nerve compression.

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