CN107126636B - Leg fixing bracket for lithotomy position radiotherapy - Google Patents

Abstract

The invention discloses a leg fixing bracket for radiotherapy in lithotomy position, which includes a base plate, two support frames and a support rod, the base plate is mortised between the two support frames, and each support frame includes a bottom column and a support plate A, support plate B, the lower ends of support plate A and support plate B are tenoned on the bottom column respectively, and the support rod connects the upper ends of support plate A and support plate B to form a complete triangular structure. The invention has the advantages of simple structure, convenient use, safety and comfort, low cost and price, and can achieve good fixing effect.

Description

A leg fixing bracket for radiotherapy in lithotomy position

technical field

The invention belongs to the field of medical devices, in particular to a leg fixing bracket for radiotherapy in lithotomy position.

Background technique

Vulvar cancer accounts for about 3% to 5% of primary malignant tumors of the female reproductive tract and 1% of female malignant tumors. Radiotherapy plays an important role in the treatment of vulvar cancer. Postoperative radiotherapy can improve the prognosis of vulvar cancer patients with advanced clinical stage or inguinal lymph node metastasis. For the radiotherapy of vulvar cancer, the traditional body position fixation method cannot well avoid the normal tissue so that the tumor part can be fully exposed, and the lithotomy position is a good method. However, the lithotomy position needs to raise the legs, and the fixation of the legs is a difficult problem. Domestic hospitals mostly use vacuum negative pressure bag heating plastic film fixation technology, but the legs are not easy to fix, which affects the positioning accuracy and poor position repeatability.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention provides a leg fixing bracket for radiotherapy in lithotomy position, which is simple in structure, convenient to use, safe and comfortable, low in cost and price, and can achieve good fixing effect.

Technical scheme of the present invention is as follows:

The leg fixing bracket for lithotomy position radiotherapy of the present invention includes a base plate, a support frame I, a support frame II and a support rod, and the support frame I includes a bottom column I, a support plate AI, and a support plate BI. The front and rear parts of the upper surface of the bottom column I are respectively provided with a plurality of mortises I at intervals, and the lower end of the support plate AI is mortised in the mortise I at the front of the bottom column I, and the support plate BⅠ The lower end is mortised in the tenon groove I at the rear of the bottom column I; the upper part of the support plate BI is provided with a support rod hole I, and the upper end of the support plate AI is provided with a support rod hole II; the support plate There is a distance between the upper end of BI and the support rod hole Ⅱ;

The support frame II includes a bottom column II, a support plate AII, and a support plate BII. The front and rear parts of the upper surface of the bottom column II are respectively provided with a plurality of tongue and groove II at intervals, and the lower end of the support plate AII is Tenon-jointed in the tenon groove II at the front of the bottom column II, the lower end of the support plate BII is tenon-jointed in the tenon groove II at the rear of the bottom column II; the upper part of the support plate BII is provided with a support rod hole III , the upper end of the support plate AII is provided with a support rod hole IV; there is a distance between the upper end of the support plate BII and the support rod hole III;

The rear parts of the bottom column I and the bottom column II are connected together through the bottom plate, and the support rods penetrate into the support rod hole I, the support rod hole II, the support rod hole III, and the support rod hole IV to form Complete triangular structure support; the two ends of the support rod respectively pass through the support rod hole Ⅰ, the support rod hole Ⅱ, the support rod hole Ⅲ, the support rod hole Ⅳ, and go out between the support plate AⅠ and the support plate BⅠ and the support plate AⅡ and the support plate BⅡ. and extend outward;

Further, the distance between the upper end of the support plate BI and the support rod hole I is equal to the distance between the upper end of the support plate BII and the support rod hole III, and the length of the distance is 8-12 cm.

The bottom column I, the bottom column II are connected with the bottom plate through mortise and tenon.

Further, the lower surfaces of the bottom pillar I and the bottom pillar II are respectively provided with a plurality of slots evenly spaced along their longitudinal direction, and the slots on the bottom pillar I and the bottom pillar II correspond to each other.

Further, the number of the card slots on the bottom pillar I and the bottom pillar II are 6 respectively, and the opening direction is downward.

Further, two rows of holes are set at intervals in the middle of the bottom plate.

Further, the number of the holes is 3 in each row.

The use process of the present invention is:

After the present invention is installed, place the card slots on the bottom surface of the bottom pillar I and the bottom pillar II on the radiotherapy board for fixing, the holes on the bottom plate are aligned with the fixing nails of the thermoplastic omentum, and the present invention is fixed Finally, the patient's legs are raised and placed on the support rod, and the raised parts of the support board BI and the support board BII are clamped on the inner sides of the legs respectively for fixation.

The beneficial effects of the present invention are:

1. The support frame of the present invention adopts the principle of triangular stability as a load-bearing structure, which has the advantages of less consumables, small volume, light weight, high strength, good firmness, and convenient use. The inner side of the legs is placed close to the higher part of the support plate, so that the height, opening angle, and distance of the supporting legs are consistent each time, and the positioning repeatability is good.

2. The present invention designs 6 downward card slots on the two bottom columns respectively, and the corresponding card slots on the two bottom columns form three gears respectively and are placed on the radiotherapy board to prevent the bracket from Sliding in the direction of the patient's head and feet, the positions of the three gears can be adjusted to suit the height of the patient. There are pins in the card slots in the middle of each bottom column, which can be inserted into the card holes on the bottom plate to prevent the bracket from sliding left and right . This design can ensure that the bracket and the bottom plate are relatively fixed on the patient's head and feet and in the left and right directions, and the movement error range is small.

3. The left and right rows of 6 holes on the bottom plate of the present invention correspond to three stalls. The holes are compatible with the fixing nails of the improved thermoplastic mesh for radiotherapy, and can firmly fix the thermoplastic mesh. membrane. This design combined with the fixation of the improved thermoplastic omentum can ensure that the patient is relatively fixed in the front-back direction, and the movement error range is small.

4. The present invention is used for radiotherapy, and can also be used on CT machines, magnetic resonance, linear accelerators and affiliated CBCTs, and the present invention has a certain distance from the tumor site and is not within the scanning range. Calculation has little impact; it can be used for lithotomy position fixation in the radiotherapy of superficial perineal tumors, such as vulvar cancer, perianal cancer and inguinal lymphoma.

5. Accurate positioning of tumor radiotherapy is the foundation, and the mechanical positioning device is the core to ensure the accuracy of treatment. The structure integrated with the treatment bed in the present invention has the advantage of accurate positioning. At the same time, the structural design of detachable installation is adopted, which is It is a relatively fixed coordinate reference and carrier relative to the patient during precise radiotherapy.

6. The present invention can effectively control the patient's movement in the front-back, left-right, and head-to-foot directions, with simple operation, small positioning error, and good body position repeatability. It is small in size, light in weight and has little attenuation effect on X-rays, and the calculation of dose to patients is negligible, and it can be placed on a conventional fixed base without purchasing any additional equipment, with good economic benefits.

Description of drawings

Fig. 1 is the front view of the present invention;

Fig. 2 is a side view of the present invention;

Fig. 3 is a bottom sectional view of the present invention;

The serial numbers and names in the figure are as follows:

1-bottom plate; 2-support frame Ⅰ; 3-support frame Ⅱ; 4-support rod; 5-card slot; 6-hole;

21-bottom column Ⅰ; 22-support plate AⅠ; 23-support plate BⅠ; 24-mortise and groove Ⅰ;

31-bottom column II; 33-support plate BII; 34-mortise II.

Implementation

The present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

Example

As shown in Figures 1 and 2, the leg fixing bracket for radiotherapy in the lithotomy position of the present invention includes a base plate 1, a support frame I2, a support frame II3 and a support rod 4, and the support frame I2 includes a bottom column I21, Support plate AI22, support plate BI23, the front and rear parts of the upper surface of the bottom column I21 are respectively provided with a plurality of tenon grooves I24 at intervals, and the lower end of the support plate AI22 is tenon-jointed with the tenon grooves on the front part of the bottom column I21 In I24, the lower end of the support plate BI23 is tenon-jointed in the tenon groove I24 at the rear of the bottom column I21; the upper part of the support plate BI23 is provided with a support rod hole I, and the upper end of the support plate AI22 is provided with Support rod hole II; there is a distance between the upper end of the support plate BI23 and the support rod hole II;

The support frame II3 includes a bottom column II31, a support plate AII, and a support plate BII33. The front and rear parts of the upper surface of the bottom column II31 are respectively provided with a plurality of grooves II34 at intervals, and the lower end of the support plate AII is Tenon-jointed in the tenon groove II34 at the front of the bottom column II31, the lower end of the support plate BII33 is tenon-jointed in the tenon groove II34 at the rear of the bottom column II31; the upper part of the support plate BII33 is provided with a support rod hole III , the upper end of the support plate AII is provided with a support rod hole IV; there is a distance between the upper end of the support plate BII33 and the support rod hole III;

The rear parts of the bottom column I21 and the bottom column II31 are connected together through the bottom plate 1 through mortise and tenon, and the support rod 4 penetrates into the support rod hole I, the support rod hole II, the support rod hole III, the support rod In the hole IV, a complete triangular structure support is formed; the two ends of the support rod 4 respectively pass through the support rod hole I, the support rod hole II, the support rod hole III, and the support rod hole IV to pass through the support plate AⅠ22, the support plate BⅠ23 and the support plate AII and support plate BII33 outside and extending outward;

The distance between the upper end of the support plate BI23 and the support rod hole I is equal to the distance between the upper end of the support plate BII33 and the support rod hole III, and the length of the distance is 8-12 cm.

The lower surfaces of the bottom pillar I21 and the bottom pillar II31 are respectively provided with six slots 5 with the opening direction downward at intervals along their longitudinal direction, and the slots 5 on the bottom pillar I21 and the bottom pillar II31 correspond to each other.

Two rows of holes 6 are provided in the middle of the bottom plate 1 at intervals, each row has 3 holes.

The use process of the present invention is:

After the present invention is installed, the slots 5 on the bottom surface of the bottom column I21 and the bottom column II31 are placed on the radiotherapy board for fixing, and the holes 6 on the bottom plate 1 are aligned with the fixing nails of the thermoplastic omentum. After the invention is fixed, the patient's legs are raised and placed on the support rod 4, and the parts higher than the support plate BI23 and the support plate BII33 respectively block the inner sides of the legs for fixation.

Claims (1)

1. Leg fixing bracket for lithotomy position radiotherapy comprises a bottom plate (1), a support frame I (2), a support frame II (3) and a support rod (4), and is characterized in that:

the support frame I (2) comprises a bottom column I (21), a support plate AI (22) and a support plate BI (23), wherein a plurality of mortises I (24) are respectively arranged on the front part and the rear part of the upper surface of the bottom column I (21) at intervals, the lower end of the support plate AI (22) is joggled in the mortises I (24) on the front part of the bottom column I (21), and the lower end of the support plate BI (23) is joggled in the mortises I (24) on the rear part of the bottom column I (21); the upper part of the supporting plate BI (23) is provided with a supporting rod hole I, and the upper end of the supporting plate AI (22) is provided with a supporting rod hole II; the upper end of the supporting plate BI (23) is separated from the supporting rod hole II by a certain distance;

the support frame II (3) comprises a bottom column II (31), a support plate AII and a support plate BII (33), wherein a plurality of mortises II (34) are respectively arranged on the front part and the rear part of the upper surface of the bottom column II (31) at intervals, the lower end of the support plate AII is joggled in the mortises II (34) on the front part of the bottom column II (31), and the lower end of the support plate BII (33) is joggled in the mortises II (34) on the rear part of the bottom column II (31); the upper part of the supporting plate BII (33) is provided with a supporting rod hole III, and the upper end of the supporting plate AII is provided with a supporting rod Kong; a distance is reserved between the upper end of the supporting plate BII (33) and the supporting rod hole III;

the rear parts of the bottom column I (21) and the bottom column II (31) are connected together through the bottom plate (1), and the support rods (4) penetrate into the support rod holes I, the support rod holes II, the support rod holes III and the support rods Kong to form a complete triangular structural support; the two ends of the supporting rod (4) respectively pass through the supporting rod hole I, the supporting rod hole II, the supporting rod hole III and the supporting rod Kong to penetrate out of the supporting plate AII (22) and the supporting plate BI (23) and extend outwards from the supporting plate AII and the supporting plate BII (33);

the distance between the upper end of the supporting plate BI (23) and the supporting rod hole I is equal to the distance between the upper end of the supporting plate BII (33) and the supporting rod hole III, and the length of the distance is 8-12cm;

the bottom column I (21) and the bottom column II (31) are connected with the bottom plate (1) through mortise and tenon joints;

the lower surfaces of the bottom column I (21) and the bottom column II (31) are respectively and uniformly provided with a plurality of clamping grooves (5) along the longitudinal interval, and the clamping grooves (5) on the bottom column I (21) and the bottom column II (31) correspond to each other;

the number of the clamping grooves (5) on the bottom column I (21) and the bottom column II (31) is 6 respectively, and the opening direction is downward;

two rows of holes (6) are formed in the middle of the bottom plate (1) at intervals;

the number of the holes (6) is 3 in each row.

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